SERVICE MANUAL

SERVICE MANUAL

SERVICE MANUAL

®

CADJET

®

T-200

COLOR INKJET

PRINTER/PLOTTER

SERVICE MANUAL

Part Number 219863-00

CadJet T-200 Service Manual

Copyright Eastman Kodak Company, 2002

KODAK, ENCAD

®

and CadJet

®

are trademarks of

Eastman Kodak Company.

Other trademarks and registered trademarks are the property of their respective owners.

Except as provided below, no part of this manual may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated in any human or computing language, in any form or by any means, electronic, mechanical, magnetic or otherwise, or disclosed to a third party without the express written permission of

ENCAD, Inc., 6059 Cornerstone Court West, San Diego,

CA 92121, U.S.A.

Certain manuals developed by ENCAD are in an electronic format to be distributed on CDs or over the internet. The registered user of an ENCAD product whose manual is distributed in this fashion may print one copy for their personal use only.

Printing history

1st Edition Rev A October 2002 iii

CadJet T-200 Service Manual

FCC Statement (U.S.A.)

The United States Federal Communications Commision has specified that the following notice be brought to the attention of the users of the CADJET

T-200 printer.

FEDERAL COMMUNICATIONS COMMISION RADIO AND TELEVISION

INTERFERENCE FOR CLASS B DEVICE

This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.

User Instructions:

If the equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Changes or modifications not expressly approved by ENCAD, Inc. could void the user’s authority to operate the equipment.

iv

CadJet T-200 Service Manual

VDE Statement

Hiermit wird bescheinigt, daß der CADJET T-200 in Übereinstimmung mit den Bestimmungen der BMPT-AmstbIVfg 234/1991 funkentstört ist. Der vorschriftsmäßige Betrieb mancher Geräte (z.B. Meßsender) kann allerdings gewissen Einschränkungen unterliegen. Beachten Sie deshalb die Hinweise in der Bedienungsanleitung.

Dem Zentralamt für Zulassungen im Fernmeldewesen würde dan

Inverkehrbringen dieses Gerätes angezeigt und die Berechtigung zur

Überprüfung der Serie auf die Einhaltung der Bestimmungen eingeräumt.

ENCAD, Inc. U.S.A

v

CadJet T-200 Service Manual

Material Safety Data Sheet

ENCAD QIS (Quality Imaging Supplies) ink is nonhazardous, requiring no special disposal handling. It can be harmful if swallowed and should be kept away from children.

To obtain a Material Safety Data Sheet, contact ENCAD, Inc. at:

6059 Cornerstone Court West

San Diego, CA 92121-3734

( 858) 452-4350

International users should contact their local dealer or distributor.

vi

CadJet T-200 Service Manual

WARRANTY OR DAMAGE CLAIMS

United States

ENCAD

®

, Inc., warrants its printers ("P

RODUCT

") to be free from defects in workmanship and materials for a period of one year from the date of purchase. In order to submit a

Warranty claim, please contact the ENCAD Help Desk at (619) 452-4350.

ENCAD reserves the right to make changes or improvements to Products, without incurring any obligation to similarly alter Products previously purchased.

Buyer's sole and exclusive rights pursuant to this Warranty shall be for the repair or replacement of defective Product. ENCAD specifically disclaims any and all other warranties, expressed or implied, including but not limited to, implied warranties of merchantability and fitness for a particular purpose. In no event shall ENCAD be liable for any loss of profit or other commercial damages, special, incidental or consequential damages, or any other damages or claims, whatsoever.

This Warranty gives Buyer specific legal rights, and Buyer may also have other rights that vary from state to state.

This Warranty applies only to printers purchased from ENCAD, or authorized ENCAD distributors or dealers. The intent of this Warranty is to repair or replace defective Products subjected to normal wear and tear, when operated according to ENCAD instructions.

This Warranty does not cover damage to the Product resulting from the following:

• Accident or negligence.

• Unauthorized modification of the Product.

• Adverse environmental conditions.

• Service of the Product by other than an ENCAD authorized service provider.

• Unauthorized or improper use, including but not limited to:

– Use in applications for which the Product was not designed.

– Using cartridges or ink other than those supplied by ENCAD or authorized

ENCAD resellers.

– Using media other than that supplied by ENCAD or authorized ENCAD resellers.

– Lubricating any part of the printer.

Internationally: Contact your dealer or distributor for warranty information.

vii

CadJet T-200 Service Manual

Table of Contents

Chapter 1 General Description ............................................................ 1-1

Introduction ............................................................................................................... 1-1

Overview ................................................................................................................... 1-3

Related Publications .......................................................................................... 1-3

Electrostatic Discharge (ESD) Sensitivity ................................................................. 1-3

Warnings, Cautions and Notes ................................................................................. 1-4

Printer Specifications ................................................................................................ 1-5

Contents of this Service Manual ................................................................................ 1-6

Technical Support ..................................................................................................... 1-8

Chapter 2 Theory of Operation ............................................................ 2-1

Introduction ............................................................................................................... 2-1

CadJet T-200 Printer General Block Diagram ............................................................ 2-1

Paper (Media) Axis Drive .......................................................................................... 2-3

The Carriage Axis Drive............................................................................................. 2-4

Main Printed Wiring Assembly (MPWA) ................................................................... 2-5

Microprocessor .................................................................................................. 2-6

Gate Array ......................................................................................................... 2-6

Memory Circuits ................................................................................................. 2-7

Flash EEPROM ........................................................................................... 2-7

DRAM .......................................................................................................... 2-8

Serial EEPROM ........................................................................................... 2-8

Stepper Motor Controller..................................................................................... 2-9

Servo Motor Controller ...................................................................................... 2-11

Control Panel ................................................................................................... 2-13

Interface Circuits: Serial & Parallel ................................................................... 2-14

Carriage Assembly Circuits ..................................................................................... 2-15

Display Assembly ................................................................................................... 2-16

Power Supply ......................................................................................................... 2-17

Fan Operation ......................................................................................................... 2-17

Chapter 3 Maintenance ........................................................................ 3-1

Introduction ............................................................................................................... 3-1

Scheduled Maintenance ........................................................................................... 3-1

Cleaning Procedures .......................................................................................... 3-2

External Cleaning ......................................................................................... 3-2 viii

CadJet T-200 Service Manual

Table of Contents (cont)

Chapter 3 Maintenance (cont)

Slide Shaft Cleaning..................................................................................... 3-2

Service Station Cleaning .............................................................................. 3-3

Linear Encoder Strip Cleaning ...................................................................... 3-4

Cartridge Dimples Cleaning .......................................................................... 3-5

Flex Cable Contact Cleaning ........................................................................ 3-6

Clean and Inspect Stepper Motor Gears....................................................... 3-7

Clean and Inspect MPWA ............................................................................ 3-7

Clean and Inspect Carriage Assembly ......................................................... 3-8

Reseat Connectors on MPWA and Carriage Board ............................................. 3-8

Replace Carriage Bushings .............................................................................. 3-11

Servo Motor Winding Resistance Check ................................................................. 3-12

Stepper Motor Winding Resistance Check .............................................................. 3-13

Banding: Hardware vs Software ............................................................................... 3-14

Common Banding Causes ......................................................................... 3-15

Alignments/Adjustments ......................................................................................... 3-17

Slide Shaft Profile Adjustment .......................................................................... 3-17

Head Height Alignment Procedure .................................................................... 3-20

Paper Skew Adjustment ................................................................................... 3-24

Paper Skew Adjustment Sequence ............................................................ 3-24

Mounting Screw Information ....................................................................... 3-25

Other Functional Requirements .................................................................. 3-28

Adjustment of Pinch Roller Supports .......................................................... 3-29

Visual Verification ................................................................................ 3-29

Observation of Paper Skew at Rear Media Alignment Mark .................. 3-30

Observation of Paper Skew at Front Media Alignment Mark ................. 3-31

Adjustment of the Mounting Screws .................................................... 3-32

Paper Axis Calibration ...................................................................................... 3-33

Deadband Alignments ....................................................................................... 3-35

Color Deadband Alignment ......................................................................... 3-36

Color Calibration ............................................................................................... 3-38

Diagnostics Menu ................................................................................................... 3-40

Clearing the NVRAM ............................................................................................... 3-42

Firmware Download/Upgrading for the PC ............................................................... 3-43

Internal Cabling and Signal Flow Diagrams ............................................................. 3-44 ix

CadJet T-200 Service Manual

Table of Contents (cont)

Chapter 4 Troubleshooting.................................................................. 4-1

Introduction ............................................................................................................... 4-1

No Power ........................................................................................................... 4-1

Initialization Failure............................................................................................. 4-2

Media Does Not Move ........................................................................................ 4-2

Internal ERROR “Carriage Axis Failure” .............................................................. 4-3

Internal ERROR “Encoder Sensor Failure” .......................................................... 4-5

Internal ERROR “Paper Sensor Failure” .............................................................. 4-5

Internal ERROR “Auto-Sensor Failure” ................................................................ 4-6

Internal ERROR “MPCB Failure” ......................................................................... 4-6

Unrecognized Cartridges Error ............................................................................ 4-6

Image Skews or Moves ...................................................................................... 4-7

Does Not Print.................................................................................................... 4-7

Ink Cartridge Misfiring ......................................................................................... 4-7

Paper Skewing ................................................................................................... 4-9

Printer Output is Banding (Horizontal) ................................................................ 4-9

Printer Output is Banding (Vertical) .................................................................. 4-11

Printer Output is Banding (Horizontally and Vertically) ...................................... 4-12

Keypad Locked-Up or Not Functioning Properly ............................................... 4-12

Noisy Operation ............................................................................................... 4-13

Line Quality Degraded ...................................................................................... 4-14

Fan Does Not Power Up ................................................................................... 4-15

Media is Not Measured Properly ...................................................................... 4-15

Initialization Troubleshooting ................................................................................... 4-16

Chapter 5 Assembly\Disassembly ...................................................... 5-1

Introduction ............................................................................................................... 5-1

Removing the Right Cover Assembly ......................................................................... 5-2

Removing the MPWA Connectors ............................................................................. 5-4

Removing the MPWA ............................................................................................... 5-5

Removing the Right SidePlate ................................................................................... 5-6

Reinstalling the Right SidePlate ................................................................................ 5-7

Reinstalling the MPWA............................................................................................. 5-7

Reinstalling the MPWA Connectors .......................................................................... 5-7 x

CadJet T-200 Service Manual

Table of Contents (cont)

Chapter 5 Assembly/Disassembly (cont)

Memory Module Removal .......................................................................................... 5-8

Memory Module Installation ...................................................................................... 5-9

Reinstalling the Right Cover Assembly ...................................................................... 5-9

Removing the Left Cover ........................................................................................... 5-9

Reinstalling the Left Cover ....................................................................................... 5-10

Removing the Servo Motor ...................................................................................... 5-10

Reinstalling the Servo Motor ................................................................................... 5-12

Removing the Display Assembly ............................................................................. 5-13

Reinstalling the Display Assembly .......................................................................... 5-14

Removing the Service Station Assembly ................................................................. 5-14

Reinstalling the Service Station Assembly .............................................................. 5-15

Removing the Carriage Assembly, Carriage Belt and the Frame Tensioner ............. 5-16

Removing the Carriage PWA................................................................................... 5-20

Reinstalling the Carriage PWA ................................................................................ 5-21

Remove the Paper Sensor or the Encoder Sensor .................................................. 5-21

Install the Paper Sensor or the Encoder Sensor ...................................................... 5-23

Replacing the Carriage Bushings ............................................................................ 5-24

Reinstalling the Carriage Assembly, Carriage Belt and the Frame Tensioner .......... 5-26

Removing the Trailing Cable .................................................................................... 5-28

Reinstalling the Trailing Cable ................................................................................. 5-29

Removing the Power Supply and ON/OFF Switch ................................................... 5-30

Reinstalling the Power Supply and ON/OFF Switch ................................................ 5-32

Remove the Stabilizer Bracket and Encoder Strip ................................................... 5-33

Install the Stabilizer Bracket and Encoder Strip ....................................................... 5-34

Disassembly of Plotter Before Removing the Inner Platen Parts .............................. 5-35

Removing the Inner Platen Parts ............................................................................. 5-37

Removing the Stepper Motor ................................................................................... 5-39

Reinstalling the Stepper Motor ................................................................................ 5-41

Reinstalling the Inner Platen Parts .......................................................................... 5-41

Reassembly of Plotter After Reinstalling the Inner Platen Parts ............................... 5-43

Removing the Upper Pinch Roller Supports ............................................................. 5-44

Reinstalling the Upper Pinch Roller Supports .......................................................... 5-46

Chapter 6 Parts List .............................................................................. 6-1

xi

CadJet T-200 Service Manual

List of Illustrations

Figure Page

Chapter 1 General Description

1-1. CadJet T-200 Inkjet Printer/Plotter ................................................................... 1-1

Chapter 2 Theory of Operation

2-1. General Block Diagram ................................................................................... 2-2

2-2. Paper (Media) Axis Drive ................................................................................. 2-3

2-3. Carriage Axis Drive .......................................................................................... 2-4

2-4. Main Printed Wiring Assembly ........................................................................ 2-5

2-5. Gate Array ...................................................................................................... 2-6

2-6. Stepper Motor Controller ................................................................................. 2-9

2-7. Servo Motor Controller ................................................................................... 2-11

2-8. Quadrature Signal Generation ....................................................................... 2-12

2-9. Control Panel ................................................................................................ 2-13

2-10. Interface Circuits ........................................................................................... 2-14

2-11. Carriage Assembly Circuits ........................................................................... 2-15

2-12. Display Assembly ......................................................................................... 2-16

Chapter 3 Maintenance

3-1. Encoder Strip Cleaning ................................................................................... 3-5

3-2. Cartridge Dimple Region .................................................................................. 3-5

3-3. Flex Cable Contacts ....................................................................................... 3-6

3-4. Main PWA Connection Locations .................................................................... 3-9

3-5. Carriage PWA Connection Locations............................................................. 3-10

3-6. Ribbon Connector Locking Mechanism ......................................................... 3-11

3-7. Servo Motor ................................................................................................... 3-12

3-8. Stepper Motor ............................................................................................... 3-13

3-9. Examples of Banding .................................................................................... 3-14

3-10. Dial Gauge Micrometer Assembly ................................................................. 3-18

3-11. Measurement Positions for Slide Shaft .......................................................... 3-19

3-12. Slide Shaft Profile Adjustment ....................................................................... 3-19

3-13. Carriage Head Height Tolerance .................................................................... 3-20

3-14. Setting Up Tools from Height Gauge Kit ........................................................ 3-21

3-15. Zeroing the Micrometer Gauge ...................................................................... 3-21 xii

CadJet T-200 Service Manual

List of Illustrations (cont)

Figure Page

Chapter 3 Maintenance (cont)

3-16. Test Cartridge Installed .................................................................................. 3-22

3-17. Pinch Roller Supports Numbering Sequence ................................................. 3-24

3-18. Pinch Roller Support and Mounting Screws ................................................... 3-26

3-19. Correct Positioning of the Spring in the Pinch Roller Support ......................... 3-27

3-20. Test for Minimum Acceptance Gap ................................................................ 3-28

3-21. Visual Verification of Gap between Roller and Y-Arm ..................................... 3-29

3-22. Paper Skew Acceptance Range for Rear Media Alignment Mark ................... 3-30

3-23. Paper Skew Acceptance Range for Front Media Alignment Mark .................. 3-31

3-24. Motion of Rollers and Adjustment of Mounting Screws .................................. 3-32

3-25. Paper Axis Test ............................................................................................. 3-34

3-26. Slow Deadband ............................................................................................. 3-35

3-27. Color Calibration ............................................................................................ 3-38

3-28. MPWA Connections Diagram ........................................................................ 3-45

3-29. Carriage PWA Connections Diagram ............................................................. 3-46

Chapter 4 Troubleshooting

4-1. Carriage Board LED D2 and D5 Locations ..................................................... 4-17

Chapter 5 Assembly/Disassembly

5-1. Removal of Right Cover Assembly ................................................................... 5-3

5-2. MPWA Connection and Screw Locations ........................................................ 5-4

5-3. Removal of Right Side Plate ............................................................................ 5-6

5-4. Removal of Left Cover .................................................................................... 5-10

5-5. Removal of the Servo Motor ........................................................................... 5-11

5-6. Compression of Frame Tensioner .................................................................. 5-12 xiii

CadJet T-200 Service Manual

List of Illustrations (cont)

Figure Page

Chapter 5 Assembly/Disassembly (cont)

5-7. Removal of Display Assembly ....................................................................... 5-13

5-8. Service Station Removal ................................................................................ 5-14

5-9. Electronics Cover Removal ............................................................................ 5-16

5-10. Strain Relief Removal/Installation ................................................................... 5-17

5-11. Frame Tensioner ........................................................................................... 5-18

5-12. Carriage Belt Clamp ...................................................................................... 5-19

5-13. Carriage PWA Removal/Installation ............................................................... 5-20

5-14. Paper and Encoder Sensor Removal ............................................................. 5-22

5-15. Paper and Encoder Sensor Installation .......................................................... 5-23

5-16. Carriage Bushing Removal ............................................................................ 5-25

5-17. Carriage Bushing Installation ......................................................................... 5-26

5-18. Revealing the Power Supply Screws ............................................................. 5-31

5-19. Inner Platen Parts ......................................................................................... 5-32

5-20. Stabilizer Bracket Removal............................................................................ 5-34

5-21. Disassembly of Plotter Prior to Removing the Inner Platen Parts ................... 5-36

5-22. Removal of Lower Drive Shaft Screws ............................................................ 5-37

5-23. Removing the Foam Block ............................................................................ 5-38

5-24. Lower Drive Shaft Assembly and Stepper Motor Assembly ............................ 5-40

5-25. Removing the Upper Pinch Roller Support ..................................................... 5-45

Chapter 6 Parts List

6-1. Left Side Parts Breakdown .............................................................................. 6-3

6-2. Platen and Above Parts Breakdown ................................................................ 6-5

6-3. Right Side Parts Breakdown ........................................................................... 6-7

6-4. Inner Platen Parts Breakdown ......................................................................... 6-9

6-5. Carriage Assembly Parts Breakdown ............................................................ 6-11

6-6. Service Station Assembly Parts Breakdown .................................................. 6-13 xiv

CadJet T-200 Service Manual

List of Tables

Table

Chapter 1 General Description

Page

Chapter 2 Theory of Operation

Chapter 3 Maintenance

3-1. Main PWA Connections Table ......................................................................... 3-9

3-2. Carriage PWA Connections Table .................................................................. 3-10

Chapter 4 Troubleshooting

4-1. Troubleshooting Table ...................................................................................... 4-1

Chapter 5 Assembly/Disassembly

Chapter 6 Parts List

xv

General Description 1

Figure 1-1. CadJet T-200 Inkjet Printer/Plotter.

Introduction

This manual provides service information for the ENCAD

®

, Inc. 36 inch CadJet T-200 Color Inkjet Printer/Plotters.

It is written for service personnel who possess analog and digital circuitry experience. Chapter 2, Theory of Operation, should be read and thoroughly understood before troubleshooting/calibrating the printers.

The printers support both pre-cut and roll media. Media size is automatically determined and hardclip limits are set accordingly. Pre-cut

1-1

CadJet T-200 Service Manual media uses different maximum plotting areas than roll media. See the

Printer Specifications in the User Guide for more details on the media size printable area.

A Centronics parallel connection is provided to interface with the host computer. Network connections are made possible through the optional

SEH print server. Commands sent from the host computer can be in several forms including HP-GL/2, HP-RTL and EN-RTL formats.

Drivers are supplied to support Windows-based PC’s (3.XX, 95/98, and

NT) as well as Macintosh and Power PC computers.

These printers expand upon ENCAD’s tradition of delivering fast, highquality color or monochrome graphics for a variety of applications.

ENCAD has made significant advances in designing these printers to respond to and anticipate our customers’ needs. Principal features are summarized below.

Locally or Remotely Configured via Host Computer

Take-Up Basket

PowerPC 33 MHz Microprocessor

8 User Configurable Settings

208 Jet Foam Filled Ink Cartridges

Ink Priming System

Snap On Ink Cartridge Caddies for longer print times between refilling

Smart Cartridges

Odometer Function

Electronic Jet Compensation

Fast CAD printing speeds

General Description 1-2

CadJet T-200 Service Manual

Overview

Printers draw according to instructions issued from a “host” computer.

Every printer is engineered to understand a specific set of instructions and to execute each instruction in a precise manner. In addition, most printers are designed to execute predetermined characters automatically without a specific line-by-line instruction from the program.

These characters are part of the printer’s permanent memory.

Related Publications

The following publication contains additional information which may be useful in servicing the ENCAD, Inc. CadJet T-200 Color Inkjet

Printers:

ENCAD Quick Start Guide for the CadJet T-200,

P/N 217892-xx

ENCAD CadJet T-200 CD-ROM,

P/N 217893-xx

Copies of these and other ENCAD, Inc. publications may be obtained by contacting your nearest authorized ENCAD, Inc. dealer or by contacting ENCAD’s Technical Support and Service Department.

Electrostatic Discharge (ESD) Sensitivity

All PWAs (Printed Wiring Assemblies) associated with the printers have components sensitive to ESD (electrostatic discharge). Care must be taken to avoid damage to any of the components by following current ESD handling procedures and practices.

Always use an approved ESD grounding strap when handling or working with PWAs.

General Description 1-3

CadJet T-200 Service Manual

Warnings, Cautions and Notes

Warnings, cautions and notes are used when additional information, instructions or care should be observed. In this manual warnings, cautions and notes precede the text to which each applies. The definition of each is provided below.

WARNINGS - Warnings are used to stress that the following steps or procedures has the potential to cause serious harm or death to service personnel. Extreme care should be observed when following the procedures and to exercise standard safety procedures. They are indicated by:

Followed by a paragraph describing the concern.

CAUTIONS - Cautions depict that the following steps or procedures can cause damage to the equipment if not properly followed. Extreme care should be observed when following the procedures and to exercise standard safety procedures. They are indicated by:

CAUTION

Followed by a paragraph describing the concern.

NOTES - Notes are placed before a procedure to inform the service personnel of specific details to improve quality, to give reminders of interrelated parts and to provide other helpful information. They are indicated by:

NOTE

Followed by a paragraph describing the concern.

General Description 1-4

CadJet T-200 Service Manual

Printer Specifications

The specifications and performance characteristics of the CadJet

T-200 Color Inkjet Printers are as follows:

Max Printing Area:

Norm 34.8”

884 mm

Extend 35.61”

904 mm

Resolution:

600x600 dpi or

300x600 dpi

Language Emulation:

HP-RTL

EN-RTL

HP GL/2

Interface:

Centronics parallel

(IEEE 1284)

Network: via 100 Base T

Print Server

Buffer:

32 MB installed upgradeable to 128 MB

Power Requirements:

Input Voltage:

90-246 VAC

47-63 Hz

Output Power:

20 W idle

50 W typical

100 W maximum

Accuracy:

Dot Placement: 0.0017

+/- 0.0008

Cut sheet feed accuracy, edge shift: +/- 0.065

inches as measured over

36 inches

Certifications:

Safety

CSA, CSE/NRTL

(equivalent to UL1950)

TUV GS

EN 50 082-1

EN 60 950

UL1950

NOM-019-SCFI-1993

IEC 950

EMI

AS/NZS 3260

FCC Class B

CSA C108.8

EN 55 022 Class B

CISPR 22- Class B

AS/NZS 3548

GB9254-98

General Description 1-5

CadJet T-200 Service Manual

Environment:

Operating:

41° to 85° F

(5° to 30° C)

20% to 80% RH non-condensing

Storage:

-5° to 140° F

(-21° to 60° C)

5% to 80% RH non-condensing

Weight:

70 lbs(31 kg)

Dimensions:

Height 48” (1210 mm)

Width 54” (1370 mm)

Depth 30” (710 mm)

Contents of this Service Manual

Figures are used in this manual to clarify procedures. They are for illustrative purposes only and may not necessarily be drawn to scale.

Material in this manual may be repeated in various chapters so that each chapter can “stand alone”. This allows information to be located without having to refer back and forth between chapters.

Figures and tables are easily located and cross-referenced, and are listed in the front of the manual under List of Illustrations and List of Tables.

This manual is divided into six chapters as:

Chapter 1 GENERAL DESCRIPTION - Contains a general description of the ENCAD CadJet T-200 printer. This includes printer specifications, and related materials. Also included is a description of the use of Warnings, Cautions and Notes as used in this manual and chapter contents.

Chapter 2 THEORY OF OPERATION - Functional descriptions of the overall printer and major assemblies are contained in this chapter.

General Description 1-6

CadJet T-200 Service Manual

Chapter 3 MAINTENANCE - This chapter covers the scheduled maintenance, cleaning procedures and alignment/adjustments recommended to perform on the printers. Diagnostics and a signal flow diagram are also listed.

Chapter 4 TROUBLESHOOTING - A table containing problems that could occur and possible causes and repairs is found in this chapter. This table is not intended to be a complete listing of troubleshooting procedures. It will isolate the problem down to the lowest replacable assembly. If the problem happens to be the wiring between assemblies, standard troubleshooting techniques will have to be implemented to correct the problem.

Chapter 5 ASSEMBLY/DISASSEMBLY - Contains detailed procedures to remove and replace printer parts and assemblies.

Chapter 6 PARTS LIST - Contains a complete listing of all field replacable parts and assemblies for the color inkjet printers. Illustrated parts breakdown drawings are included to help clarify and identify parts for ordering.

Special kits and adjustment jigs may also be required.

ORIENTATION - Instructions in this manual are based on the assumption that the service person is facing the front of the printer.

References to top view, back view, and so forth are consistent with this engineering standard. References to the X Axis and Y Axis

(Paper Axis and Carrier Axis, respectively) follow the standard of

AutoCAD™ absolute coordinates: up and down for X, left to right for

Y.

General Description 1-7

CadJet T-200 Service Manual

Technical Support

ENCAD offers full technical support and service for its various products. If you are unable to find the answer to your question in either the

User’s Guide, Service Manual, or other related publications, check out

ENCAD’s Knowledge Base located on ENCAD’s website support:

ENCAD Website: http://www.encad.com

Additional information is available though our Technical Support and

Service Department’s Help Desk.

ENCAD, Inc.

Technical Support & Service Dept.

6059 Cornerstone Court West

San Diego, CA 92121

Help Desk Telephone:

Help Desk FAX:

(858) 452-4350 or

(877) ENCAD-TS (362-2387)

(858) 558-4672

International users contact your local ENCAD service provider. See details on your ENCAD registration card.

General Description 1-8

Theory of Operation

Introduction

This chapter explains the mechanical and electrical theory of operation of the ENCAD CadJet T-200 color inkjet printers.

The CadJet T-200 is a PowerPC 33MHz microprocessor-based digital printer that receives plotting instructions from a host computer through the Centronics parallel interface. This interface is either connected directly to a computer or through a network print server.

CadJet T-200 Printers General Block

Diagram

Figure 2-1 illustrates the major functional areas of the printers.

The CadJet T-200 printers consist of two mechanical assemblies:

1. Paper (Media) Axis Drive

2. Carriage Axis Drive and four main electrical assemblies:

1. MPWA (Main Printed Wiring Assembly)

2. Carriage Assembly

3. Display Assembly

4. Power Supply

2

2-1

CadJet T-200 Service Manual

DISPLAY

CIRCUITS

POWER

SUPPLY

LEGEND

ELECTRICAL CONNECTION

MECHANICAL CONNECTION

MAIN DATA BUS

SERVO

MOTOR

CARRIAGE AXIS DRIVE

MICRO-

PROCESSOR

GATE

ARRAY

MEMORY

CIRCUITS

MPWA

STEPPER

MOTOR

PAPER

SENSOR

ENCODER

SENSOR

CARRIAGE

PWA

CARRIAGE

ASSEMBLY

PAPER AXIS DRIVE

LOWER

DRIVE

ASSEMBLY

Figure 2-1. General Block Diagram.

Theory of Operation 2-2

Paper (Media) Axis Drive

PINCH ROLLERS

CadJet T-200 Service Manual

STEPPER MOTOR

LOWER ROLLER SHAFT ASSY

Figure 2-2. Paper (Media) Axis Drive.

REDUCTION GEAR

The Paper (Media) Axis Drive moves the plotting media in a direction perpendicular to the length of the printer. This friction drive utilizes a micro-step drive technology and consists of a stepper motor, reduction gears, lower drive shaft assembly, and pinch rollers. This can be seen in Figure 2-2.

The reduction gear meshes the stepper motor to the lower drive shaft assembly which allows the media to advance or retract. The purpose of the pinch rollers is to apply pressure to the media onto the drive shaft assembly to reduce the chance of slipping.

Misaligned pinch wheels is a main cause of skewing the media. When skewing occurs, pinch roller alignment may be required.

Theory of Operation 2-3

The Carriage Axis Drive

CadJet T-200 Service Manual

Figure 2-3. Carriage Axis Drive.

The Carriage Axis Drive moves the printer’s carriage assembly along the length of the printer. The drive consists of a servo motor, linear encoder strip, drive belt, and tensioning assembly. These items are illustrated in Figure 2-3.

The servo motor, drive belt, and tensioning assembly are the components that actually drive the carriage assembly. The servo motor drives the belt back and forth allowing the attached carriage assembly to be repositioned as required. The tensioning assembly is spring controlled and allows the proper amount of tension on the belt.

The linear optical encoder strip is used to obtain the printers accuracy along the axis of the printer. It is made with 150 parallel lines per inch etched into it. By utilizing two optical encoder sensors that are slightly off set from each other, and reading the leading and trailing edges of the lines, a resolution of 600 dpi can be obtained.

The stepper and servo motors are controlled from the main printed wiring assembly by the microprocessor.

Theory of Operation 2-4

CadJet T-200 Service Manual

Main Printed Wiring Assembly (MPWA)

OSC

Y1

MICRO-

PROCESSOR

(CPU)

STEPPER MOTOR

CONTROLLER

FLASH

EEPROM

DATA BUS

SERIAL

EEPROM

DYNAMIC

RAM

MEMORY CIRCUITS

GATE

ARRAY

SERVO MOTOR

CONTROLLER

CONTROL

PANEL

CARRIAGE

PWA

PARALLEL

Figure 2-4. Main Printed Wiring Assembly.

The Main Printed Wiring Assembly (MPWA) consists of seven functional areas:

1.

Microprocessor (CPU)

2.

Gate Array

3.

Memory Circuits

4.

Stepper Motor Controller

5.

Servo Motor Controller

6.

Control Panel

7.

Interface Circuits: Parallel

Theory of Operation 2-5

CadJet T-200 Service Manual

Microprocessor

The microprocessor (an IBM PowerPC) is the central processor unit which supervises system functions, executes the printer firmware, manipulates data, and controls input/output data busses. It has two built-in serial ports, a two channel DMA (Direct Memory Access) controller, a timer module, clock generator, and an on-board chip select generator. One serial port connects to the Mini-DIN connector which can be used to communicate with the host computer; the other serial port interfaces to the Control Panel. One DMA channel supplies data to the gate array for jet firing; the other DMA channel is used to receive data through the parallel port via the gate array, or the serial port when using a high speed serial mode. One timer generates a servo interrupt every millisecond; the other is used for timing the Stepper

Motor.

The system is timed by a 33MHz system clock from an oscillator (Y1).

The chip select generator is programmed to generate chip selects at the appropriate addresses, with the appropriate data size (byte, word) and with the appropriate number of wait states.

Gate Array

PARALLEL

PORT

GATE

ARRAY

STATIC

RAM

Figure 2-5. Gate Array.

SERVO

CONTROLLER

MICROSWITCHES

TO

CARRIAGE

PWA

Theory of Operation 2-6

CadJet T-200 Service Manual

The gate array contains the hardware logic for dot firing, monitoring changes in the Carriage Assembly position, controlling DMA through the parallel port, receiving commands from the microswitches and generating the PWM (Pulse Width Modulation) waveforms for the servo controller.

The gate array is a Xilinx device. It is a static RAM-based field programmable gate array. This means that the logic that it implements is determined by configuration information in internal RAM storage. Each time power is turned on, this information must be downloaded from the system ROM. This type of gate array allows for the flexibility of upgrading the logic by simply downloading the new system software.

Memory Circuits

Memory is used to retain large amounts of information. This information is stored in the device memory in the form of binary bits.

Printer memory consists of Flash, DRAM, and EEPROM.

Maximum installable memory is as follows:

DRAM = 32 MB

Flash = 1 MB

Serial EEPROM = 1KB

Flash EEPROM

Flash EEPROM is Electrically Erasable, Programmable, Read Only

Memory used to store instructions and data constants which the microprocessor can access and interpret, with no loss of information when power is off.

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CadJet T-200 Service Manual

The system firmware is stored in Flash EEPROM. The Flash

EEPROM allows the firmware to be upgraded by downloading the files containing the new firmware. It can be erased and reprogrammed more than 10,000 times. The term “Flash” means that bytes cannot be individually erased. A block or the whole device is erased at the same time and the block or whole device is then reprogrammed.

The normal method of downloading new firmware is to send the unit the files containing the code using either the GO.EXE utility or printing the file to the unit. This requires using an appropriate host utility and can be done through the serial port (for Macintosh users) or the parallel port

(for PC users). See Firmware Downloading in Chapter 3 for the procedures.

DRAM

DRAM is Dynamic Random Access Memory which provides temporary storage of the microprocessor calculation and input/output data. It is also a faster type of memory then the Flash EEPROM. That’s why the printer control program is also copied from the Flash EEPROM to RAM, where it can be executed faster.

The printer also has one 168-pin 64-bit DIMM socket for a DRAM memory module. The printer is supplied with a 32 Megabyte DIMM installed on the MPWA. The following DIMM sizes are supported:

32MB, 64MB and 128MB.

Serial EEPROM

Serial EEPROM is an Electrically Erasable, Programmable, Read Only

Memory which provides storage for calibration constants and user configuration data entered from the host computer.

An 8K bit serial nonvolatile EEPROM stores calibration and configuration information. It retains data while the unit is off.

Theory of Operation 2-8

Stepper Motor Controller

CadJet T-200 Service Manual

Figure 2-6. Stepper Motor Controller.

The media is driven by a Stepper Motor, which drives the media in a direction perpendicular to the width of the printer. The media in the printer can advance forward and backward, depending upon the commands which the Stepper Motor receives from the microprocessor.

The Stepper Motor Controller contains two identical circuits, one for each winding of the stepper motor. The circuit is a combination of two simpler types of circuits and can be thought of as a variation of either one.

A waveform generator receives digital data from the CPU and generates a sine wave output. This signal is fed into a comparator circuit that is measuring the current through the winding of the stepper motor. If the current is too low, a pulse of 24V is generated. When the current goes above the output of the waveform generator, the pulse turns off. Every time the output of the waveform generator is changed by the microprocessor, the motor moves 1 “micro-step”.

Each circuit contains four main functions (see Figure 2-6):

1. Reference waveform generator

The microprocessor uses a D/A (digital to analog) converter to set the desired level for the current in the stepper motor winding. The output of the D/A converter varies in time to create a reference waveform. This reference waveform is centered around 10V.

Theory of Operation 2-9

CadJet T-200 Service Manual

2. Motor current sense

The voltage across a series current sense resistor is measured and level shifted so that it is centered around 5V.

3. Comparator

This portion divides the output of the reference waveform generator by two and compares it to the output of the motor current sensor.

Logic inside the gate array generates the control signals for the power driver that applies voltage across the motor winding in order to make the actual current match the reference waveform.

4. Power driver

An H-bridge allows the supply voltage to be applied across the winding in either polarity used to drive the current level to the desired value.

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CadJet T-200 Service Manual

Servo Motor Controller

GATE

ARRAY

MOTOR

DRIVER

SERVO

MOTOR

ENCODER

SERVO

CONNECTOR

CARRIAGE

CONNECTOR

CARRIAGE

MAIN PWA

Figure 2-7. Servo Motor Controller.

The Carriage Assembly is driven by the Servo Motor. The speed of the

Carriage Assembly is controlled by varying the duty cycle of the signal applied to the controller. The microprocessor checks the position of the

Carriage Assembly approximately 1,000 times per second (during the servo interrupt). It then updates the PWM (pulse width modulator) register in the gate array which sets the duty cycle to make adjustments to the Carriage Assembly speed. A linear optical encoder is used to monitor the Carriage Assembly position.

The optical encoder strip runs the length of the Stabilizer Bracket and contains 150 lines and spaces per inch. Thus there are 300 edges per inch.

The detector circuit actually consists of two optical edge detectors. They are separated from each other by one half the width of one of the optical lines on the encoder strip. This allows 4 evenly spaced pulses to be developed for each line on the encoder strip.

This is known as quadrature signals. It gives an effective resolution of

600 lines per inch. See Figure 2-8 for a graphical representation of quadrature signals. For 300 dpi resolution, one of the detectors is not used.

Theory of Operation 2-11

CadJet T-200 Service Manual

Figure 2-8. Quadrature Signal Generation.

The direction that the Carriage Assembly is moving is known based upon the state of one detector’s output and the direction of the transition of the other detector’s output.

A hardware counter in the gate array increments as the Carriage

Assembly moves left and decrements as the Carriage Assembly moves right. The hardware counter is only eight bits wide, so it cannot store a value large enough to represent an absolute Carriage Assembly position.

Instead, it is read during the servo interrupt and its value compared with that from the previous interrupt. This difference is used to update the absolute position value in the software.

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CadJet T-200 Service Manual

Control Panel

LOAD

ERROR

RESET

READY

SHORTCUTMENU

MENU

SELECT

Figure 2-9. Control Panel.

The Control Panel is located on the right side of the printer and contains two indictors

ERROR

READY and seven buttons

RESET resets all conditions to factory select settings

SHORTCUT MENU allows immediate access to common functions: cut, prime, feed media, access

MENU cartridge, pause and clean begins the main menu routine

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CadJet T-200 Service Manual

SELECT

UP ARROW

DOWN ARROW

LOAD when depressed, accepts the slection shown on the display cycles through the available options cycles through the available options loads the media

Interface Circuits: Parallel

MICRO-

PROCESSOR

GATE

ARRAY

PARALLEL

CONNECTOR

Figure 2-10. Interface Circuits.

Data from the host computer is received through the Centronics parallel port. The gate array provides the control signals for DMA transfers from the parallel port to DRAM.

The parallel port is the connection for sending print jobs to the printer.

This port can be connected to a wide variety of computers running various operating systems. It is also used to connect the printer to a network print server device such as the SEH Print Server that comes as an option with the printer.

Theory of Operation 2-14

CadJet T-200 Service Manual

Carriage Assembly Circuits

OPTICAL ENCODER

OPTICAL SENSOR

TRAILING

CABLE

TRAILING

CABLE

CONNECTION

FROM

MPWA

CARRIAGE

PWA

PAPER SENSOR

INKJET

DRIVERS

CARTRIDGE 1

CARTRIDGE 2

CARTRIDGE 3

CARTRIDGE 4

CARRIAGE ASSEMBLY

Figure 2-11. Carriage Assembly Circuits.

The Carriage Assembly contains:

1) Carriage PWA

2) Optical Sensors

3) Paper Sensor

4) Inkjet Cartridges

The Carriage PWA contains the logic and drive circuitry for the firing of the inkjet cartridges. It also establishes an interface path for the optical sensor and paper sensor to communicate with the MPWA.

The optical sensors receive their inputs from the optical encoder strip and sends this data to the MPWA. The MPWA uses this information to determine the horizontal position of the carriage assembly so that accurate printing can be established.

Theory of Operation 2-15

CadJet T-200 Service Manual

The paper sensor circuitry senses for the presence of loaded media. It does this automatically during the start-up and load sequences. It also constantly monitors the media during printing to determine if the media has run out.

If no paper is sensed, the paper sensor sends this information to the

MPWA, which immediately begins an ‘out of paper’ subroutine. This subroutine stops the printer from printing until more media is loaded.

The sensor also checks for the size of the media loaded so it can determine the proper printing parameters.

Display Assembly

The Display Assembly is located on the right side portion of the platen and displays information and menu options available for selection.

Figure 2-12. Display Assembly.

Theory of Operation 2-16

CadJet T-200 Service Manual

Power Supply

An internal UL recognized switching power module supplies power for the printers. It provides a constant 24VDC output from input voltage in the 90-132 VAC and 180-246 VAC ranges. A power switch turns the power on and off. The 24VDC is applied to the MPWA where it is further regulated and separated into 24VDC, 13VDC, and 5VDC. The

24V supply is used for: the stepper controller (which advances the paper); the servo controller (which moves the Carriage); and power to fire the inkjets. The 5V supply powers the logic circuits.

The power supply is fused using a 6.3A 250V fast blow type fuse.

The outputs share a common ground which is isolated from earth ground with in the supply itself. Earth ground and DC ground are connected external of the power supply.

The power supply will shut down under overload/short circuit conditions on any output over the full range of input voltage. Overvoltage protection is 20%-30% above nominal for the 24V output.

Fan Operation

A fan is located inside the platen with its fan vent seen from under the platen on the right side of the printer. This fan provides suction on the platen bed and holds the paper (media) flat during the printing process.

It also serves to cool the power supply since the power supply is located inside the platen.

Theory of Operation 2-17

Maintenance

Introduction

This chapter contains general maintenance and cleaning instructions for the CadJet T-200 printer.

Scheduled Maintenance

Scheduled maintenance consists of a list of checks that are planned to be performed on a regular basis or when conditions warrant it.

Scheduled maintenance can be thought of as preventive maintenance since its purpose is to prolong the life of the printer. It is not intended to repair or isolate an existing problem, though it can sometimes be helpful in detecting a condition due to a weakened component that has not yet completely failed.

Below is a list of scheduled maintenance checks and their recommended periodicity.

Clean external areas:

Clean slide shaft:

Clean service station:

Clean encoder strip:

Clean cartridge dimples:

Clean flex cable contacts:

Clean and inspect motor gears:

Clean and inspect MPWA:

Clean and inspect carriage assembly:

Reseat connectors on MPWA:

Reseat connectors on carriage board:

Replace carriage bushings:

Replace service station wipers semiannually, or as required weekly daily weekly weekly, of if prime fails weekly, or if prime fails, or cartridge is replaced bimonthly annually annually annually annually semiannually every 150 plot hours

3

3-1

CadJet T-200 Service Manual

Cleaning Procedures

Always turn the printer OFF, remove the power cord and the interface cable before cleaning the printer. An electrical shock hazard may be present if these procedures are not followed.

External Cleaning

CAUTION

Do not use abrasive cleansers of any sort on the surfaces of the printer. Damage to the surface may result.

The exterior surfaces of the printer may be cleaned with a soft cloth which has been dampened. For more persistent stains, a small amount of liquid detergent may be used. Cleaning intervals are determined by the environment in which the printer is used.

Slide Shaft Cleaning

CAUTION

Use only isopropyl alcohol on the slide shaft of the printer.

Damage to the stainless steel slide shaft may result if cleaned with water and not completely dried off.

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CadJet T-200 Service Manual

Printer problems can be caused by an accumulation of dirt or other contamination on the slide shaft. This contamination may lead to drag on the carriage. Extreme drag results in a “carriage axis failure” fault and will stop the carriage motion. These problems may be eliminated by maintaining and cleaning the slide shaft at intervals determined by the environmental conditions. Do not use any lubrication.

To clean the slide shaft:

1. Turn the printer OFF. Disconnect the power cord and interface cable.

2. Raise the printer lid.

3. Moisten a clean cloth or paper wipe with isopropyl alcohol.

4. Wipe the length of the slide shaft with the moistened cloth or wipe.

5. Manually move the carriage assembly from side to side.

6. Wipe the shaft again to remove any deposits left from the carriage.

7. Close the cover and reconnect the power cord and interface cable, turn the printer ON and perform the PRIME procedure.

Be sure that the carriage moves freely on the slide shaft.

Service Station Cleaning

Ink and dust may build up on the service station, resulting in contamination which may smear the prints. The service station is cleaned as follows:

1. Turn the printer OFF. Disconnect the power cord and interface cable.

2. Raise the printer lid.

3. Carefully move the carriage toward the center of the printer.

Maintenance 3-3

CadJet T-200 Service Manual

4. Using a cotton swab dampened with distilled water, wipe the seals and the rubber wiper in the service station until no more ink residue or dust can be removed.

5. With a dry swab, wipe all moisture from the seals and wipers.

6. Close the lid and reconnect the power cord and interface cable.

7. If the service station is filling with ink or very dirty it can be removed for cleaning. To remove, pull the tab on the right side of the service station and lift out. Replacement of the pads in the service station are recommended at this time. Wash, dry thoroughly and replace by placing the left side in first then pushing down on the right side until the tab locks it in place.

Linear Encoder Strip Cleaning

Clean the linear encoder strip weekly or as necessary to remove any buildup of debris. Distilled water or isopropyl alcohol may be used. You may notice that it tends to fog the encoder strip; however, no detrimental effect has been observed in the field.

To clean the Encoder Strip:

1. Disconnect the power cord and interface cable.

2. Slightly dampen a cotton swab with distilled water or isopropyl alcohol and wipe along the length of the encoder strip on both sides.

3. Reconnect the power cord and interface cable.

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CadJet T-200 Service Manual

Figure 3-1. Encoder Strip Cleaning.

Cartridge Dimples Cleaning

CARTRIDGE

DIMPLE

AREA

Figure 3-2. Cartridge Dimple Region.

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CadJet T-200 Service Manual

The cartridge dimple area can easily be contaminated by oils and dirt on fingers and hands or ink spilled onto them. This causes the cartridges to not receive some of the electrical signals for a proper firing of the jets.

This can be seen as a misfiring of the cartridge.

NOTE

Care should be used when handling the cartridges. Avoid touching the cartridges on the dimple area or on the inkjet holes on the bottom. The oils and dirt on fingers and hands can contaminate the area and result in misfiring of the inkjets.

Clean the cartridge dimple area by gently dabbing the area with a lint free cloth or cotton swab saturated with isopropyl alcohol.

Be sure to clean the yellow cartridge because it is not readily apparent that it is dirty. The yellow ink is hard to see and could be overlooked.

Flex Cable Contact Cleaning

Figure 3-3. Flex Cable Contacts.

FLEX CABLE

CONTACTS

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CadJet T-200 Service Manual

Cleaning the flex cable contact area is very important due to the ease of which this area can become dirty. The flex for the yellow cartridge is deceiving because it is not readily apparent that it is dirty. This also causes the cartridges to not receive all of the electrical signals for a proper firing of the jets. This can be seen as a misfiring of the cartridge.

NOTE

Care should be used when handling the flex cable contact area. Avoid touching the contact area because the oils on your skin can contaminate the area and result in misfiring of the inkjets.

Clean the flex cable contacts by gently dabbing the area with a cotton swab soaked with isopropyl alcohol.

Clean and Inspect Stepper Motor Gears

The stepper motor gears can become dirty and after time if not cleaned up, it could cause wide banding in the print. This will reduce the quality of the intended output. Clean the motor gears with a stiff brush to knock off any debris. A cotton swab soaked isopropyl alcohol can be used to remove any ink that may have accumulated on the gears.

Clean and Inspect MPWA

Foreign material on the MPWA could short out electrical signals being developed on the MPWA and cause erroneous prints or even damage to the MPWA. All electrical circuits should be free of foreign material, especially those materials with conductive properties.

Clean the MPWA by blowing the objects away or gently brush them aside with a soft brush if required.

Inspect the MPWA for any damage to the board, connections, or any of the components on the board. Replace board if inspection reveals any damage or flaws that could effect the function of the MPWA.

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CadJet T-200 Service Manual

Clean and Inspect Carriage Assembly

Foreign material on the carriage assembly could short out signals being developed on the carriage assembly and cause erroneous prints or even damage to the carriage assembly. A very common problem is where ink has been spilled onto the carriage assembly. All electrical circuits should be free of foreign material, especially those with conductive properties.

Clean the carriage assembly by blowing the objects away or gently brush them aside with a soft brush if required. Be careful not to let anything to fall into the printer as you clean or it could cause a new problem later.

Inspect the carriage assembly for any damage to the boards, connections, or any of the components on the assembly.

Reseat Connectors on MPWA and Carriage

Board

CAUTION

Integrated circuits may become weakened or damaged by electrical discharge. Do not touch or work near integrated circuits without wearing an ESD wrist strap.

CAUTION

Ribbon connectors can be easily damaged if incorrectly handled. Observe extreme caution when handling the ribbon connectors to avoid damage.

Many problems can be corrected simply by removing and reseating connections found in circuit assemblies. This process helps to clean the contacts and can dissipate any static electrical charges that might have developed.

Maintenance 3-8

CadJet T-200 Service Manual

Figure 3-4. Main PWA Connection Locations.

J1

J2

J3

J4

J5

Table 3-1. Main PWA Connections.

not used

Parallel Port

Display Circuits

DIMM socket

Vacuum/Cooling Fan

J6 Trailing Cable

J7 Servo Motor

J8 not used

J9 Power Supply

J10 Stepper Motor

J11 not used

Maintenance 3-9

CadJet T-200 Service Manual

Figure 3-5. Carriage PWA Connection Locations.

J1

J2

J3

Table 3-2. Carriage PWA Connections.

Yellow Drivers

Magenta Drivers

Cyan Drivers

J4 Black Drivers

J5 Encoder Sensor

J6 Trailing Cable

J7 Paper Sensor

Figures 3-4 & 3-5 and Tables 3-1 & 3-2 show the locations of all the connectors on the MPWA and carriage board respectively. To remove the ribbon cables from their connectors, lift the connector’s ribbon locking mechanism as shown in Figure 3-6. To reattach, depress the locking mechanism back into the locking position after inserting the ribbon cable end.

Maintenance 3-10

CadJet T-200 Service Manual

LOCKING

MECHANISM

RIBBON

UNLOCKED

LOCKED

CONNECTOR

ASSEMBLY

Figure 3-6. Ribbon Connector Locking Mechanism.

Replace Carriage Bushings

The carriage bushings are rated for approximately 1500 hours of operational usage. Many factors including, but not limited to, hours/ day used, cleanliness of the slide shaft and general ambient environment make it impossible to calculate the average time that the carriage bushings to last.

If not replaced, the wear on the bushings can result in erratic carriage motion and/or carriage axis failures. It can even cause the cartridge head height to become uneven.

To replace the carriage bushings, follow the procedures for Carriage

Bushing Replacement found in Chapter 5.

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CadJet T-200 Service Manual

Servo Motor Winding Resistance Check

Figure 3-7. Servo Motor.

1. Disconnect the servo motor connection from J7 on the MPWA.

2. Using a standard ohmmeter or multimeter, connect the meter leads to the two wires going to the motor.

3. While manually rotating the servo motor, monitor the readings on the meter. The acceptable range is 4-10 ohms. Typically, the reading is 5-8 ohms.

5. If the measurement is found to be unsatisfactory, replace the servo motor.

Maintenance 3-12

CadJet T-200 Service Manual

Stepper Motor Winding Resistance Check

7.2-8.0

ohms

7.2-8.0

ohms

RED

WIRE

Figure 3-8. Stepper Motor.

1. Disconnect the stepper motor connection from J10 on the

MPWA.

2. Using a standard ohmmeter or multimeter, measure between pins 1 (red wire) and 3.

3. The reading should indicate 7.2-8.0 ohms.

4. Continue by measuring between pins 4 and 6.

5. Reading should also indicate 7.2-8.0 ohms.

6. If either measurement is out of tolerance, replace the stepper motor.

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CadJet T-200 Service Manual

Banding: Hardware vs Software

The technician must be able to identify whether the banding that is being observed is related to either a hardware or a software problem.

The two examples in Figure 3-9 represent classic types of hardware and software banding errors.

HARDWARE SOFTWARE

Figure 3-9. Examples of Banding.

Hardware banding is usually characterized by consistent banding strips as shown. It signifies a slippage in the media’s normal movement that is possibly due to the stepper motor, lower drive shaft assembly, pinch rollers, or the rollguides on the back of the printer. All these possible faulty areas deal with a rotational movement that, if faulty, will generate a consistent banding pattern. The MPWA and Carriage PWA can also cause this type of error to incur.

Software banding is characterized by inconsistent banding lines. These banding lines are generated by the software when the application incorrectly interprets the media advancing/ink firing sequence of the expected print file. Because it is not directly tied to a mechanical movement, the bands become inconsistent in both frequency and duration. The possible causes are the printer driver, the original software package, or the RIP, if one is used. To eliminate the chance that it is the printer driver:

1) Remove any RIP or network systems and connect the printer directly to the computer.

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CadJet T-200 Service Manual

2) Print a test file approved by ENCAD that uses only the printer driver software and the ENCAD printer.

If the test file prints correctly, the problem lies in either the software package that generated the print or the RIP, if used.

A simple test to determine if the banding is caused by the computer/

RIP/application or the printer is to rotate the image 90 degrees and see if the banding rotates or remains in the same orientation as the previous print. If the banding does not rotate, then look for causes in the printer. If the banding does rotate with the image, then look for causes in the computer/RIP or application.

Common Banding Causes

1. The RIP (Raster Image Processor) and print cycles. We recommend printing to a file first and then queuing the file to the printer to avoid the RIP and print cycle delays that can cause banding while printing.

2. Uneven inkjet kogation (partial clogging or orifice restriction) on the inkjet cartridge head nozzles. Run the 100% color test and re-prime or replace the cartridge if necessary.

3. Lower quality print modes normally cause slight banding, to reduce this banding, switch to 4-pass printing mode.

4. Air bubbles in the ink delivery system (if installed). This indicates a loss of negative pressure within the ink cartridge or ink delivery system, check all quick release fittings and connections for possible leaks and ensure that the cartridge is primed properly.

5. Improper priming. The lower secondary chamber within the cartridge may de-prime and then temporarily recover after entering the service station causing a momentary color drop out in the print if the cartridge is improperly primed.

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CadJet T-200 Service Manual

6. Wiping during a print can sometimes cause a band of lighter density color in the image. Auto wipe may need to be temporarily turned off to prevent banding.

7. Operator intervention. If someone lifts up the media on the takeup side of the printer while it is printing, it can cause momentary banding in the print. Lifting up the media while printing changes the inkjet head-to-media distance and will effect the printed dot size and placement of the ink droplets.

8. Cartridge failures can cause banding — electrical cartridge failures and partial clogging of the inkjets can produce banding.

With Inkjet Detection and Compensation technology, electrical cartridge failures and clogging can be corrected for up to 20 failures per cartridge with minimal degradation of the output.

9. Media width variations causing the media to drag on the media guides can cause banding. Check the edges of the media for evidence of media drag and edge anomalies.

10. Lower quality dithering. Select the highest quality dithering pattern in the printer driver. i.e. stochastic dithering.

11. Deadband and cartridge calibrations. If the deadband calibration is off, or the cartridge calibration is off, it can effect banding.

Also, if one color seems to be causing the banding — shifting the color calibration of that color +/-1 unit may help.

12. Inkjet sputter. If the cartridge heater is set too high, inkjet sputter may occur causing intermittent white spots throughout the print.

13. Improper grounding or earthing. An improper A/C outlet power ground may cause banding due to excessive noise on the line between the neutral and ground. Ensure the outlet has a clean zero ground potential with minimal noise between the neutral and ground.

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CadJet T-200 Service Manual

14. Static electricity. Using certain types of media (i.e. polyesterbased media), static electricity buildup within the media roll may effect the un-roll resistance and cause momentary banding to occur. However this has not been tested.

15. Data corruption may also effect banding. If you are using a parallel cable that is too long or improperly shielded, the data being sent to the printer may get corrupted and cause artifacts in the print.

16. Overlapping images of different types on the same print may create color bands between the images at the overlaps (i.e. RGB images with CMYK images).

Alignments/Adjustments

The ENCAD CadJet T-200 printer is designed with a minimum of maintenance requirements in mind. Calibrations include: paper axis calibration, deadband alignment, and color calibration. The mechanical adjustment requirements include the slide shaft profile, cartridge head height and paper skew adjustments. They do not require any electrical alignments.

Slide Shaft Profile Adjustment

The CadJet T-200 printer Slide Shaft height is factory set and is firmly mounted on the outer sides and only has adjustments in the middle portion of the shaft, to remove any bowing of the shaft’s profile. The following procedure is to ensure that the Slide Shaft is relatively perpendicular to the surface of the Platen and to remove any bowing that may be present in the shaft’s profile.

The Slide Shaft is set to 1.418” (36cm) from the top of the Slide Shaft to the Platen surface for these printers. The normal operating range for the height of the Slide Shaft is between 1.390” (35.3cm) to 1.440”

(36.6cm).

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CadJet T-200 Service Manual

You will need the following:

· Height Gauge Kit Assembly

· 1/4" open and box end wrench (.110” thick)

Height Gauge (Alignment) Kit Contents are:

Dial Gauge Micrometer

Modified Novajet Cartridge for newer products

Modified Novajet 4/Pro/Pro 50 Cartridge - Not Used

Platen/Carriage Shaft Mounting Block

Calibration Jo Block (1.434”)

Plastic Gauge Card (0.011”)

- Not used

- Not used

There are two basic measurements that are to be made using this kit (ensure power is off prior to performing these procedures):

1. Slide Shaft Profile Adjustment

2. Carriage (Cartridge) Head Height Setting

1. Connect the dial gauge micrometer to the Shaft mounting block as shown in Figure 3-10.

ZERO

GAUGE

TIGHTEN SET

SCREW (NOT

SHOWN)

SHAFT

MOUNTING

BLOCK

Figure 3-10. Dial Gauge Micrometer Assembly.

2. Place gauge against left side of shaft assembly allowing micrometer tip to rest directly on top of shaft. See Figure 3-11.

Zero the gauge (this is to become the reference point).

Maintenance 3-18

MEASURE

FIRST

MEASURE

LAST

CadJet T-200 Service Manual

MEASURE

SECOND

ADJUST IF

NECESSARY

Figure 3-11. Measurement Positions for Slide Shaft.

3. Measure the right side (next to media alignment mark.) and note the difference. Divide this amount by two.

4. Measure just off the center of the slide shaft and adjust the center turnbuckle with an open ended wrench if required, for the average value (the value found in step 3.) See Figure 3-12.

THIS IS THE TURNBUCKLE

SCREW. POSITION GAUGE

AS CLOSE TO THE SCREW

AS POSSIBLE.

THIS IS THE INNER SCREW.

POSITION GAUGE DIRECTLY

IN FRONT OF IT.

Figure 3-12. Slide Shaft Profile Adjustment.

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CadJet T-200 Service Manual

For example: If the Left = 0, Right = +0.004”, then the center should be adjusted to + 0.002”. This will ensure a smooth plane of travel for the carriage assembly. There are no adjustments on either end of the shaft in all models.

Head Height Alignment Procedure

Perform this procedure only when the encoder strip stabilizer has been removed from the Y-Arm or whenever the alignment is in question.

The head height alignment procedure is to ensure that the correct amount of distance exists between the cartridge jet plate and the Platen.

See Figure 3-13.

CARTRIDGE

JET PLATE

PLATEN

HEAD HEIGHT

Figure 3-13. Carriage Head Height Tolerance.

1. Remove the lid and the right cover of the printer. See Chapter 5 for procedures.

2. Obtain the 3 tools (Micrometer Dial Gauge, Test Cartridge, and

Measuring Tip Extender) from the Height Gauge Kit. Assemble the tools as shown in Figure 3-14.

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CadJet T-200 Service Manual

SPIN HEAD ON

MICROMETER GAUGE

TO FACE BACKWARDS

MICROMETER

DIAL GAUGE

TIGHTEN SET

SCREWS

TEST CARTRIDGE

MEASURING

TIP EXTENDER

ENSURE TIP EXTENDS

BELOW CARTRIDGE

1/4" (6mm)

Figure 3-14. Setting Up Tools from Height Gauge Kit.

3. Place the test cartridge upright on a flat surface and ‘zero’ the gauge by loosening the knob near the top and turning the dial until the needle is at the ‘0’ position on the dial. Tighten the knob. See Figure 3-15.

0

ZERO

GAUGE

ENSURE PRESSURE IS

PLACED ON THE REAR

OF THE CARTRIDGE

Figure 3-15. Zeroing the Micrometer Gauge.

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CadJet T-200 Service Manual

4. Remove the Cyan ink cartridge. Snap the test cartridge with the micrometer gauge into the position vacated by the Cyan ink cartridge. See Figure 3-16. Ensure that the micrometer can be read from the BACK of the printer.

Figure 3-16. Test Cartridge Installed.

5. Slightly loosen the screws located on the back of the Y-arm that secures the stabilizer to the Y-arm.

CAUTION

Damage may occur to the micrometer gauge if the Carriage is moved without lifting up on the measuring tip. This action could also take the micrometer out of alignment and foul the results of the alignment.

6. While lifting up the measuring tip of the micrometer, slide the

Carriage to the left side of the stabilizer. Position it as close to the screw as possible and drop the measuring tip onto the platen. Do this a couple of times to ensure an accurate reading.

7. Move the left end of the stabilizer bracket until the reading below is observed. Read only the RED numbers on the micrometer gauge.

For these printers adjust for a reading of 67 +/- 3. This equates to a head height of 0.075”.

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CadJet T-200 Service Manual

NOTE

The actual measurement is different than the true head height due to the fact that the test cartridge does not contain a jet plate assembly. A difference had to be calculated to compensate for the lack of a jet plate assembly on the test cartridge.

9. Tighten the screw on the left side of the stabilizer.

10. While lifting up the measuring tip of the micrometer, slide the

Carriage to the right until the next stabilizer screw is lined up.

Position it as close to the screw as possible and drop the measuring tip onto the platen. Do this a couple of times to ensure an accurate reading.

11. Move the left end of the stabilizer bracket until a correct reading is observed. Read only the RED numbers on the micrometer gauge.

12. Tighten the screw on the stabilizer that is next to the Carriage.

13. Continue performing steps 10 through 12 until all four of the stabilizer screws have been adjusted.

14. Reposition the Carriage to all of the adjustment positions and verify that the measurements are correct.

15. Perform steps 6 through 14 as many times as necessary to correctly accomplish this adjustment.

16. Install the ink delivery system support bracket following the procedures located in Chapter 5.

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CadJet T-200 Service Manual

Paper Skew Adjustment

The purpose of the Paper Skew Adjustment is to make certain that the

Pinch Roller in the Upper Roller Support stays centered on its shaft and/or has a gap when the Lower Roller is rotated forward for approximately two full revolutions. In other words, the Pinch Roller should not drift rapidly to the left or to the right when the Lower Roller is rotated forward for two full revolutions. (Slow drifting is acceptable.)

Use the torque screwdriver with the P0 bit to adjust the Pinch Roller mounting screws.

NOTE

Read and follow ALL of the information in the following pages before you begin the actual ajustments.

Paper Skew Adjustment Sequence

It is very important that the sequence for the adjustment given in this section be observed. Refer to Figure 3-17 for the numbering sequence of the Pinch Roller Supports.

8

5

6

7

4

1

2

3

Figure 3-17. Pinch Roller Supports Numbering Sequence.

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CadJet T-200 Service Manual

NOTE

The rollers should be adjusted moving from the right

side of the Platen to the left side of the Platen.

1. Load a sheet of B-Size paper and adjust Rollers #8, #7, and #6, following the directions in the Adjustment of Pinch Roller

Supports section.

2. Load a sheet of D-Size paper and adjust Rollers #5 and #4, following the directions in the Adjustment of Pinch Roller

Supports section.

3. Load a sheet of E-Size paper and adjust Rollers #3, #2, and #1, following the directions in the Adjustment of Pinch Roller

Supports section.

Mounting Screw Information

1. The torque requirements for the Pinch Roller Support mounting screws is 3 In.-Lbs. ± 0.5.

2. Turning the mounting screw clockwise will tighten the screw.

Turning the mounting screw counterclockwise will loosen the screw.

3. Figure 3-18 shows the Pinch Roller, Pinch Roller Spacer and the mounting screws. You must stand behind the plotter in order to adjust the mounting screws on the Pinch Roller

Supports.

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CadJet T-200 Service Manual

ROLLER

PINCH ROLLER

ASSEMBLY

LEFT MOUNTING

SCREW

Y-ARM

PINCH ROLLER

SPACER

RIGHT MOUNTING

SCREW

ORIENTATION

STANDING BEHIND THE PLOTTER,

FACING THE BACK OF THE PLOTTER

Figure 3-18. Pinch Roller Support and Mounting Screws.

4. If the mounting screw on the right side is loosened (turned counterclockwise), the roller will move to the left. If the mounting screw on the left side is loosened (turned counterclockwise), the roller will move to the right. NEVER

LOOSEN OR TIGHTEN BOTH MOUNTING SCREWS AT

THE SAME TIME ON THE SAME UPPER ROLLER

SUPPORT.

5. If you have loosened one of the mounting screws and the roller has moved, and you need to move the roller in the opposite direction, you must tighten that mounting screw BEFORE loosening the other screw to move the roller in the opposite direction. When tightening the first screw, turn it clockwise with the torque screwdriver until the maximum torque is reached. Then loosen the other screw. AGAIN, NEVER

LOOSEN OR TIGHTEN BOTH MOUNTING SCREWS AT

THE SAME TIME ON THE SAME UPPER ROLLER

SUPPORT.

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CadJet T-200 Service Manual

6. It is extremely important that you maintain downward pressure (towards the floor) on the head of each screw at the same time as you tighten or loosen the screws. Each screw must be completely at the bottom edge of its hole in the back of the Y-Bracket. If this is not done, the Upper Roller

Support will not be perfectly level and will not perform its function properly.

7. Following all of the information in this section precisely will ensure that the Pinch Roller Support springs are deflected and the lower tail of the springs will always be pressed against the

Pinch Roller Spacer (without a gap) as shown in Figure 3-19.

Y-ARM

MOUNTING SCREW

PINCH ROLLER

SPACER

PINCH ROLLER

ASSEMBLY

PINCH ROLLER ASSEMBLY

MUST TOUCH SPACER

IN THE AREA SHOWN

Figure 3-19. Correct Positioning of the Spring in the Pinch

Roller Support.

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CadJet T-200 Service Manual

Other Functional Requirements

The paper skew has a tendency to increase as the size of paper increases

(B-Size through E-Size). When adjusting the skew, make sure that:

1. the skew for B-Size paper is as close to the low end of the range as possible; and

2. a minimum gap still remains between all Pinch Roller Supports and the Y-Arm. The test for acceptable gap is that a piece of bond paper can be inserted through the gap without interference; that is, the gap must be at least the thickness of a piece of bond paper. See Figure 3-20. Avoid adjusting the Pinch

Roller Supports so that they touch the Y-Arm’s cut outs.

THE MINIMUM ACCEPTABLE

GAP BETWEEN THESE TWO

POINTS EQUALS THE THICKNESS

OF A PIECE OF BOND PAPER.

THE MINIMUM ACCEPTABLE

GAP BETWEEN THESE TWO

POINTS EQUALS THE THICKNESS

OF A PIECE OF BOND PAPER.

Figure 3-20. Test for Minimum Acceptable Gap.

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CadJet T-200 Service Manual

Adjustment of Pinch Roller Supports

NOTE

Be sure to perform the adjustment according to the sequence given in Figure 3-17.

Visual Verification

Make sure that the roller is centered in the Y-Arm. The gap between the roller and the Y-Arm should be approximately equal on both sides of the roller. See Figure 3-21.

GAP GAP

Figure 3-21. Visual Verification of Gap between Roller and Y-

Arm.

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CadJet T-200 Service Manual

Observation of Paper Skew at Rear Media Alignment Mark

1. Position a sheet of the appropriate size paper for loading. The cut corner should be the top right corner of the paper as you load it. Make sure the correct side is up against the rollers, and the right-hand side is aligned with the Front Media Alignment

Mark on the front of the Platen.

NOTE

Make sure that there is no gap between the right edge of the paper and the left edge of the Front Media Alignment

Mark on the Platen.

2. Hold the media and press LOAD. The paper will be pulled in past the Platen’s groove. The paper will roll forward (out) and stop.

3. Check to make sure that the gap between the right edge of the paper and the left edge of the Rear Media Alignment Mark (on back of the Platen) is within 2 line widths (0.12”). See Figure 3-

22.

PAPER

PLOTTER'S REAR MEDIA ALIGNMENT MARK

(LOCATED ON THE BACK SIDE OF THE PLATEN)

PAPER

LEFT

0.00" - 0.12"

RIGHT

PAPER SLEW ACCEPTANCE RANGE = TWICE

THE WIDTH OF THE MEDIA ALIGNMENT MARK

Figure 3-22. Paper Skew Acceptance Range for Rear Media

Alignment Mark.

Maintenance 3-30

CadJet T-200 Service Manual

Observation of Paper Skew at Front Media Alignment Mark

1. Press FEED MEDIA and then the UP ARROW to move the media forward while you observe the paper skew at the Front

Media Alignment Mark.

2. The paper should be returning to its preloading location, preferably without any skew (gap). Engineering specification requires the skew to be within 0.00” 0.06” (approximately one width of Platen’s line). See Figure 3-23.

FRONT MEDIA ALIGNMENT MARK

OF THE PLATEN)

PAPER PAPER

LEFT

0.00" - 0.06"

PAPER SLEW ACCEPTANCE

RANGE = ONE LINE WIDTH

RIGHT

Figure 3-23. Paper Skew Acceptance Range for Front Media

Alignment Mark.

Maintenance 3-31

CadJet T-200 Service Manual

Adjustment of the Mounting Screws

Figure 3-24 shows how the motion (rapid drifting to the right or to the left) of the roller determines which mounting screw should be tightened in order to eliminate the motion of the roller so that the roller stays in the center of the shaft and/or there is a gap when the Lower Roller is rotated forward.

IF ROLLER MOVES

TO THE RIGHT

AND TOUCHES,

IF ROLLER MOVES

TO THE LEFT

AND TOUCHES,

NO GAP NO GAP

ORIENTATION

STANDING BEHIND THE PLOTTER,

FACING THE BACK OF THE PLOTTER

THEN TIGHTEN THE

LEFT MOUNTING SCREW

1/2 TURN AT A TIME.

THEN TIGHTEN THE

RIGHT MOUNTING SCREW

1/2 TURN AT A TIME.

Figure 3-24. Motion of Rollers and Adjustment of Mounting

Screws.

Once you have completed the adjustment of Rollers #8, #7, and #6, adjust Rollers #5 and #4, following the same procedures. After Rollers

#5 and #4 are adjusted, adjust Rollers #3, #2, and #1, following the same procedures.

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CadJet T-200 Service Manual

Paper Axis Calibration

The paper axis calibration procedure ensures that the processing that drives the stepper motor is correct to minimize line length accuracy errors.

To perform the paper axis procedure:

Depress the “Menu” key on the control panel to begin the main menu subroutine.

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Utility Menu

Paper Calib

Calib XY=(“On” or “Off”)

Ensure that Calib XY is set to ON and press “Select.” This allows the printer to store the data that is entered in the following steps.

Then select:

Paper Axis Test

This runs the paper axis test which prints out two “T” figures that are mirrored from each other and about 33” apart. See Figure 3-27.

Maintenance 3-33

CadJet T-200 Service Manual

33"

Figure 3-25. Paper Axis Test.

With a precision drafters measuring stick, measure the exact distance from each of the “T” intersections.

Select Paper Axis=XX. The XX will read “33.00” if the plotter is set in English units or “83.82” if in metric units.

Using either “Up Arrow” or “Down Arrow”, rotate through the selections until the exact value of the measurement found is selected. Press “Select” to accept the selection.

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CadJet T-200 Service Manual

Deadband Alignments

Deadband calibration compensates for minute differences created when bidirectional printing is used. Unidirectional printing is not affected by deadband. There are two types of deadband tests:

Fast Deadband

Slow Deadband

Figure 3-26. Slow Deadband.

Figure 3-26 shows what the display will look like when printing the slow deadband test if it is out of alignment. A correctly aligned printer will appear as if there is only a series of vertical lines printed. No difference between the top and bottom set of lines to the center set of lines would be apparent.

The SLOW DEADBAND calibration is a precision test that checks the firing time of the jets as related to the forward and reverse direction.

Allowable values for the Slow Deadband calibration is -2, -1, 0, 1 and 2.

The Fast Deadband test will print a display similiar to Figure 3-26 but will print the pattern for each of the four colors. This is a visual check of the color deadband alignment only. No adjustments can be made for this test. To make adjustments see the Color Deadband Alignment section.

Allowable values for the Color Deadband alignments are from 1 to 12.

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CadJet T-200 Service Manual

To perform the Slow Deadband Alignment

Depress the “Menu” key on the control panel to begin the main menu subroutine.

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Utility Menu

Db Calib

Slow Db Test

Selecting “Slow Db Test” will run the slow deadband test. This will print the color calibration plot as shown in Figure 3-26.

When the plot is complete, observe the plot and determine if an adjustment is required.

If an adjustment is required, select “slow Db=XX” and using either

“Up Arrow” or “Down Arrow”, choose a value that is either one less or one greater then the current value. Press “Select” to accept the selection and rerun the Slow Db Test.

Continue performing these steps until the slow deadband adjustment is correct.

Color Deadband Alignment

The color deadband alignments are necessary to ensure that the output images are being produced with the highest quality standards available while using the ENCAD printer in a bidirectional mode.

These adjustments help to compensate for any deviations that may have become apparent due to the carriage speed and/or the type of media loaded. Precise calculations are being performed to time the release of the ink drop so that they land on the media at the correct location.

Differences in media thickness make the distance that the ink has to fall vary and this variable needs to be compensated for in the calculations.

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CadJet T-200 Service Manual

To perform the Color Deadband Alignments

Depress the “Menu” key on the control panel to begin the main menu subroutine.

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Utility Menu

Db Calib

Color Db Test

Select “Color Db Test” to run the color deadband test.

The test consists of 12 default calibration settings. When the test is run it will print out a pattern of 5 calibration lines for each of the 12 settings. It will print this pattern in black first, followed by cyan, magenta and then yellow. Also printed will be the current settings for each of the four colors as well as the slow deadband setting.

When the plot is complete, select “K Fast DB=XX”.

Observe the plot and using either “Up Arrow” or “Down Arrow”, rotate through the selections until one that seems closest to the correct value is selected. Press “Select” to accept the selection.

Continue performing these steps until the all color deadband adjustments are correct.

Maintenance 3-37

CadJet T-200 Service Manual

Color Calibration

This procedure describes how to check that the cartridges are properly aligned for color plotting and should be followed each time the ink cartridges are installed. Figure 3-25 is a representation of how a color calibration looks when printed.

Y

M

C

COLOR VERTICAL HEAD-TO-HEAD CALIBRATION

Y

-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6

COLOR HORIZONTAL HEAD-TO-HEAD CALIBRATION

C

M

Current Heads (Y, M, C)

Figure 3-27. Color Calibration.

The “Current Heads (Y, M, C)” view represents the alignment of the heads as they are currently entered. This is just an overview of all heads and how they are aligned. Do not attempt to align the heads using this view.

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CadJet T-200 Service Manual

The “Color Horizontal Head-to-Head Calibration” checks the alignment of the nozzles horizontally and allows corrections when required. Just enter the value below the set of lines that are correctly aligned. Be careful that you are aligning the correct color by observing the C (cyan),

M (magenta), and Y (yellow) on the right side of the plot.

The “Color Vertical Head-to-Head Calibration” checks the alignment of the nozzles vertically and allows corrections when required. Just enter the value below the set of lines that are correctly aligned. Be careful that you are aligning the correct color by observing the C (cyan), M

(magenta), and Y (yellow) on the right side of the plot.

To perform the Color Calibration:

Depress the “Menu” key on the control panel to begin the main menu subroutine.

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Utility Menu

Color Calib

Print Test

This will print the color calibration plot as shown in Figure 3-25.

When the plot is complete, use the “Up Arrow”, Down Arrow” and

“Select” keys on the control panel to select “C Vert=XX”.

Observe the plot and using either “Up Arrow” or “Down Arrow”, rotate through the selections until the one that best aligns the cyan color on the plot is selected. Press “Select” to accept the selection and return to the Color Calib Subroutine.

Continue until all six calibrations on the Color Calib Menu have been accomplished.

Maintenance 3-39

CadJet T-200 Service Manual

Diagnostics Menu

To get to the Diagnostics Menu:

Depress the “Menu” key on the control panel to begin the main menu subroutine.

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Utility Menu

Service Menu

Diag. Menu

All tests under the Diagnostics Menu should be performed by competent technicians only. The types of tests that can be performed are: Servo

PWM Test, Servo Cycle Test, Carriage Test, Color Test and Continuous

Test.

Servo “PWM Test” - Monitors the PWM (pulse width modulation) signal applied to the servo motor from the driver on the MPWA to check the amount of force required to move the Carriage.

The test performs three complete cycles of the carriage assembly and lists the average PWM, the maximum PWM, and the position of the carriage where the maximum PWM occured.

Servo “Cycle Test” - Tests the servo motor by moving the carriage back and forth across the slide shaft. The number of cycles is selectable and the available options are:

10

100

1,000

10,000

100,000

1,000,000.

Maintenance 3-40

CadJet T-200 Service Manual

Carriage Test - Prints 5 sets of 3 parallel lines to test the vibration characteristics of the carriage assembly.

Color Test - The Color Test prints a wide swath of each color (total of four) to test for banding. The test is selectable in the amount of ink that is to be printed. The available are: 10%, 25%, 35%,

50%, 65%, 75%, and 100%.

Continuous Test - The Continuous Test sends the printer into a test loop that will perform a series of tests continuously. Powering down and restarting the printer is the only way of exiting this test loop.

The Continuous Test will first prime the cartridges, followed by a serial port test, parallel port test, a fast deadband display and a color calibration display.

The deadband and color calibration displays are used only as a visual inspection of the operating condition of the printer. No adjustments can be performed while in the Continuous Test mode.

A loopback Test Cable is required to correctly accomplish the serial and parallel port tests. Install both ends of the Loopback

Cable before running this test. The Loopback Test Cable is listed in Chapter 6.

After completing the deadband display, the test will begin again with the prime and continue until power is removed.

Maintenance 3-41

CadJet T-200 Service Manual

Clearing the NVRAM

NOTE

If you think that the printer is coming back to ENCAD for Failure Mode Analysis, do not clear the NVRAM as it will also clear out any additional information that FMA and Engineering may need to properly diagnose the cause of the failure.

Clearing the NVRAM is required anytime that a MPWA is to be permanently removed from a printer. The NVRAM is a section of nonvolatile memory that stores printer size information. The MPWA is the identical for both printers but it will have to learn which size printer it is installed in. Clearing the NVRAM allows the MPWA to relearn which size printer it is reinstalled into.

Clearing the NVRAM also resets all values to their default settings, including the clock. After clearing the NVRAM, all user settings and electrical calibrations will be lost and needs to be performed again.

To clear the NVRAM

Depress the “Menu” key on the control panel to begin the main menu subroutine.

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Utility Menu

Service Menu

Press either the “Up Arrow”, Down Arrow” key until a blank is displayed on the bottom line, then press the “Select” key

twice

.

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CadJet T-200 Service Manual

Using the “Up Arrow”, Down Arrow” and “Select” keys on the control panel select:

Code1 = 0

Code1 = 8

Code2 = 0

Code2 = 2

Code3 = 0

Code3 = 4

Code4 = 0

Code4 = 5

Hidden Menus

Clear NVRAM

After selecting “Clear NVRAM”, cycle the power on the printer.

Firmware Download/Upgrading

The normal method of downloading new firmware is to send the file as if it was a standard print job.

To perform the firmware download, follow the steps listed below:

1. Power OFF printer, wait 15 seconds.

2. Connect parallel printer cable between the printer and PC.

3. Turn the printer ON.

4. Obtain the latest firmware for your printer. Save both of the files to the same directory on the hard drive. Double click on

XXXX.EXE file to inflate the compressed files. The file name might be different then listed above.

5. Go to a DOS environment and from within that same directory type: GO XXXX.ROM and press Enter. The firmware is sent to the printer as an ordinary print job.

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CadJet T-200 Service Manual

NOTE

For NT3.5x or NT4.0 systems click on “Start” - “Programs”, “Command Prompt.” At the “dos” prompt go to the location of the .ROM (i.e.: if the .ROM file is on a floppy disk, type A: and press Enter.

Then type: PRINT /D:LPT1 A:\XXXX.ROM and press Enter.

6. Wait approximately 40 seconds.

7. Remove power from printer for 15-20 seconds. Apply power to the printer. The printer should initialize properly. Verify firmware revision by sequencing through Utility Menu -

Service Menu - About menu. Verify firmware has been incorporated.

8. If the firmware download is not successful you may hear more than 1 beep or complete silence. Check parallel port connections and return to step 5.

Internal Cabling and Signal Flow Diagrams

Figures 3-28 and 3-29 are schematics of the major components and the cabling associated between them. The diagrams depicts component boards or assemblies, jack connections, cables, and signal flow. It is to be used by the technician as an additional aid in troubleshooting and improve understanding of the printers theory of operation.

Figure 3-28 shows all cable connections to the MPWA and the power supply. Figure 3-29 shows all cable connections to the carriage PWA.

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CadJet T-200 Service Manual

Figure 3-28. MPWA Connections Diagram.

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Figure 3-29. Carriage PWA Connections Diagram.

Maintenance 3-46

Troubleshooting

Introduction

Chapter 4, Troubleshooting consists of a table that is intended to aide the technician in troubleshooting the CadJet T-200 printers. This table addresses symptoms with their possible causes and solutions.

Basic troubleshooting skills will be required to perform the symptom identification, troubleshooting, fault isolation, and repair of the printer when using this table.

Ensure that all applicable software diagnostic tests have been properly executed, all visual indications (including LED status) have been observed, and all applicable pushbuttons have been depressed to obtain a complete list of symptoms to be applied to the table below.

Use the table in conjunction with Chapter 3, Maintenance, whenever the table prompts you for additional information. This information may be in the form of an illustration, additional data, or a procedure that needs to be performed.

4

Symptoms

No Power

Table 4-1. Troubleshooting Table.

Possible cause Solution

• printer not ON depress power switch replace power cord • faulty power cord

• AC input not present at power supply replace AC entry module

4-1

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms

No Power (cont)

Possible cause

• DC output voltage not present (see

Figure 3-28 for pin-out)

Solution replace power supply

• DC voltage replace MPWA present at MPWA

Initialization

Failure

• DIMM unseated, reseat or replace defective or missing DIMM

• power supply defective replace power supply

• trailing cable defective replace trailing cable

Media Does Not

Move

• perform Stepper replace stepper

Motor Winding

Resistance check motor if out of tolerance

• rough motion while spinning stepper motor bad bearings replace stepper motor

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CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms

Media Does Not

Move (cont)

Possible cause

• media control switches are

Solution driver corrupted reload printer operating correctly driver reload firmware • firmware corrupted

• bad MPWA

• ESD (electrostatic discharge) replace MPWA ensure that all ESD components are properly installed then replace MPWA

Internal ERROR

“Carriage Axis

Failure”

• dirty (or lubricated) slide shaft

• perform Servo

Motor Winding

Resistance check

• check servo motor for smooth movement

• obstruction in path of carriage

(may or may not be visible) perform Slide Shaft

Cleaning procedure replace servo motor bad bearings replace servo motor remove obstruction

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Table 4-1. Troubleshooting Table (cont).

Symptoms

Internal ERROR

“Carriage Axis

Failure” (cont)

Possible cause

• dirty encoder strip

Solution perform Encoder

Strip Cleaning procedure

• dirt under the remove carriage carriage bushings bushings and clean

• damaged encoder strip replace encoder strip

• bad encoder sensor

• worn carriage bushings

• faulty trailing cable reseat or replace encoder sensor replace carriage bushings

• loose trailing cable connections remove power and reseat trailing cable connections at the

MPWA and the carriage assembly

• cutter assembly replace cutter malfunction assembly

• damaged carriage drive belt system

1) check idler/ tension assembly

2) check carriage belt replace trailing cable

Troubleshooting 4-4

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms

Internal ERROR

“Encoder Sensor

Failure”

Possible cause Solution

• encoder sensor cable unseated reseat encoder sensor cable

• bad encoder sensor replace encoder sensor

Internal ERROR

“Paper Sensor

Failure”

• servo motor and vacuum fan connections to

MPWA are switched

• paper sensor cable unseated

• bad paper sensor reattach connections correctly (use Figure

3-4 for reference) reseat paper sensor cable replace paper sensor

• servo motor disconnected

• trailing cable connection is faulty check servo motor connections reseat trailing cable

• bad trailing cable replace trailing cable

Troubleshooting 4-5

CadJet T-200 Service Manual

Symptoms

Table 4-1. Troubleshooting Table (cont).

Possible cause Solution

Internal ERROR

“MPCB Failure”

• bad MPWA replace MPWA

Unrecognized

Cartridges Error

• faulty connection check cartridges of cartridge ID chip to flex cable

• wrong cartridges check cartridges installed

• carriage flex check flex driver cable disconnected cable connections

• trailing cable connections

• faulty trailing cable reseat trailing cable replace trailing cable

• MB version incorrect

• faulty carriage

PWA verify correct MB version (ie 18-27-0) replace carriage

PWA

Image Skews or

Moves

• dirty encoder strip clean encoder strip (top and bottom)

• defective encoder replace encoder strip strip

Troubleshooting 4-6

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms

Does Not Print

Possible cause Solution

• no media loaded verify media is measured properly

• bad connection reseat cable between computer connections on and printer computer and printer

• firmware is corrupted

• faulty quad flex cable

• bad MPWA refresh EEPROM firmware with new download replace quad flex cable or complete carriage assembly replace MPWA

Ink Cartridge

Misfiring

• nozzles clogged

• cartridge filter clogged perform “clean”

• cartridge low on refill or replace ink cartridge replace cartridge

• ink drop out

(ink starvation resembling intermittent banding) replace ink caddy

Troubleshooting 4-7

CadJet T-200 Service Manual

Symptoms

Ink Cartridge

Misfiring (cont)

Table 4-1. Troubleshooting Table (cont).

Possible cause

• flex contacts dirty or damaged

Solution

1) perform Flex

Cable Contact

Cleaning procedures

2) replace carriage assembly

• cartridge dimple 1) perform area dirty or damaged

Cartridge Dimple

Cleaning procedure

2) replace cartridge reseat cartridge • cartridge not seated correctly

• bad cartridge

• service station dirty or not properly sealing cartridge jet area replace cartridge

1) perform Service

Station Cleaning procedures

• bad carriage assembly

• bad MPWA

2) replace service station replace carriage assembly replace MPWA

Troubleshooting 4-8

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms

Paper Skewing

Possible cause Solution

• stepper motor gearing dirty or damaged clean assemblies and perform Inspect

Stepper Motor

Gears procedure

• lower roller loose torque screws down securing lower roller

Printer Output is Banding

(Horizontal)

• low print pass mode

• if banding is consistent increase print pass mode

1) inspect and/or replace stepper motor (perform

Stepper Motor

Winding Resistance

Check)

2) inspect and/or replace stepper motor gears and/or lower roller assembly

3) replace MPWA

• check amount replace or refill of ink in cartridges cartridges

• cartridges need to be primed perform Prime, followed by Color

Test to ensure nozzles are clear

Troubleshooting 4-9

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms Possible cause Solution

Printer Output is • color calibration perform Color

Banding (Horizontal) required Calibration

(cont)

• paper axis calibration required perform Paper Axis

Test Calibration

• carriage bushings replace bushings worn or damaged

• defective carriage replace bushings bushings

• faulty or corrupt reload firmware firmware

• cartridge dimple 1) perform area dirty or damaged

Cartridge Dimple

Cleaning procedure

• flex cable contacts dirty or damaged

2) replace cartridge

1) perform Flex

Cable Contact

Cleaning

2) replace carriage assembly

• carriage assembly obstructed check carriage assembly for proper movement along

Y-arm

• carriage belt is loose, too tight, reinstall, check tension assembly, worn, or damaged and/or replace belt

Troubleshooting 4-10

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms Possible cause

Printer Output is • corrupted

Banding (Horizontal) NVRAM

(cont)

• carriage head height incorrect

Solution clear NVRAM check carriage head height and perform calibrations

• incompatable or replace memory defective memory module module

Printer Output is Banding

(Vertical)

• dirty carriage bushings clean bushings

• defective carriage replace bushings bushings

• trailing cable connections

• faulty trailing cable reseat trailing cable replace trailing cable check lower roller • lower roller height incorrect

• dirty encoder strip clean encoder strip

• defective encoder replace encoder strip strip

Troubleshooting 4-11

CadJet T-200 Service Manual

Symptoms

Table 4-1. Troubleshooting Table (cont).

Possible cause Solution

Printer Output is Banding

(Horizontally and Vertically)

• dirty encoder strip clean encoder strip

• defective encoder replace encoder strip strip

• bad MPWA replace MPWA

Keypad Locked-

Up or Not Functioning Properly

• firmware problem

1) reset printer

2) refresh or upgrade firmware

• keypad assembly replace keypad damaged assembly

• faulty connection reseat or replace between MPWA connector and keypad

• bad MPWA replace MPWA

Troubleshooting 4-12

CadJet T-200 Service Manual

Table 4-1. Troubleshooting Table (cont).

Symptoms

Noisy Operation

Possible cause Solution clean printer • ink or paper debris in printer

• obstruction in path of carriage

• carriage bushings worn

• debris or obstruction in fan remove obstruction/ clean printer replace carriage bushings clean fan assembly

• drive belt slipping on idler

• hardware or assemblies loose

• carriage height too low replace frame tensioner, spring, or idler

• lower drive shaft gears are clean and/or realign lower drive shaft dirty or misaligned gears

• noisy servo motor

• noisy stepper motor tighten hardware or assemblies perform Carriage

Head Height

Adjustment replace servo motor replace stepper motor

Troubleshooting 4-13

CadJet T-200 Service Manual

Symptoms

Line Quality

Degraded

Table 4-1. Troubleshooting Table (cont).

Possible cause Solution

• ink cartridges dirty or clogged clean and prime ink cartridges

• cartridge dimple clean or replace region dirty or cartridge damaged

• color calibration perform Color needed Calibration

• deadband perform Deadband calibration needed Calibration

(in bidirectional printing mode)

• debris or lubrication on slide shaft clean slide shaft

• leaks or bubbles 1) reseal/prime ink in ink delivery lines delivery lines on both sides

2) replace ink delivery lines clean encoder strip • dirty encoder strip

• defective encoder replace encoder strip strip

• carriage bushings worn replace carriage bushings

Troubleshooting 4-14

CadJet T-200 Service Manual

Symptoms

Line Quality

Degraded (cont)

Table 4-1. Troubleshooting Table (cont).

Possible cause

• drive belt worn

Solution replace drive belt

• drive belt slipping on idler replace frame tensioner, spring, or idler

• vacuum fan not replace fan operating assembly

Fan Does Not

Power Up

• MPWA has

24 VDC at J3 pins 1-2

1) reseat connection at MPWA to fan

2) replace fan

• power not being 1) reload firmware applied to fan

2) replace MPWA

Media is Not

Measured Properly

(normal carriage • dirty platen function is observed, surface but media reverses out the rear of • defective platen printer or continually surface advances forward)

• dirty paper sensor

• defective paper sensor clean platen surface recoat platen surface with applicable paint clean paper sensor replace paper sensor

Troubleshooting 4-15

CadJet T-200 Service Manual

Initialization Troubleshooting

The sequence that the printer follows during initialization (power up) is as follows:

1. Power supply turns on - LED D2 on carriage turns on then D5 turns on.

2. Reads the Flash ROM information.

3. Performs memory test with installed SIMMs.

4. Writes the Flash ROM data into RAM for quicker execution of the code. Starts executing instructions from RAM.

5. Loads MPWA gate array with boot code data.

6. Checks for a valid ROM. If the ROM is not valid, waits for a ROM image to be downloaded.

7. Steps 2 - 4 performed again.

8. Loads MPWA gate array with ROM code data.

9. Loads gate array on the carriage board. LED D2 goes out as soon as the carriage board gate array is programmed.

10. Turns on power supply cooling fan.

11. Moves carriage.

12. Checks and measures media size if loaded.

13. Turn on display.

To troubleshoot using the D2 and D5 LEDs:

With the power off, move the carriage away from the service station and snap the carriage cover off just enough to view the LEDs located in Figure 4-1.

Turn on the unit. After a short delay, the LED D2 will light.

This will be followed by D5 turning on (D5 will illuminate dimly).

After about 3-4 seconds LED D2 will extinguish. Ensure that the LED extinguishes after about 3-4 seconds. Approximately 4 seconds later LED D5 will illuminate brightly momentarily and then return to the dimly lit status.

move.

The fan will turn on and the carriage assembly will begin to

Troubleshooting 4-16

CadJet T-200 Service Manual

Turn the unit off immediately after the LED D5 returns to the dimly lit status to ensure no damage occurs to the carriage or carriage cover due to the carriage movement as stated in step 11.

Snap the cover back onto the carriage.

LED D5 signifies that bias voltage is available on the carriage board.

If LED D2 does not go out, setup the printer and download new firmware as discussed in Chapter 3. Repeat these procedures. If LED

D2 still does not go out, possible areas to suspect is the MPWA, carriage board, or the trailing cable.

D2

YELLOW

D5

GREEN

Figure 4-1. Carriage Board LED D2 and D5 Locations.

Troubleshooting 4-17

Assembly\Disassembly

5

Introduction

Chapter 5 contains the procedures for removal and replacement of the

CadJet T-200 printer assemblies and mechanisms. Illustrations are provided for clarity. Steps for each replacable part may depend on parts already removed in previous diassembly procedures. It is recommended that you read through each procedure before beginning the removal and replacement of any assemblies or mechenisms.

The following is a list of tools which are recommended to disassemble and reassemble the printer:

#1 Phillips Torque Screwdriver

#2 Phillips Torque Screwdriver

#1 Slotted Torque Screwdriver

#2 Slotted Torque Screwdriver

#1 Phillips Screwdriver

#2 Phillips Screwdriver

#1 Slotted Screwdriver

#2 Slotted Screwdriver

5/16 Hex Nut Driver

7/64 Hex Nut Driver

Wrench, 1/4”

Screwdriver, Socket Head, 1/4”

Wire Cutters

Needle Nose Pliers

X-ACTO Knife

ESD Wrist Strap

Fixture, Trailing Cable, Tape, Location, P/N 204142 (optional)

The following materials are also required:

Isopropyl Alcohol

Cotton Swabs

Lint Free Cloth or Tissue

Double Sided Tape (1/16’ thick, 3/4” wide)

Loctate Blackmax, P/N 200172

A Hardware Kit is available for the printers. See Chapter 6 of this manual for the part number.

5-1

CadJet T-200 Service Manual

Always turn the printer OFF, remove the power cord and the interface cable before beginning any disassembly procedures. An electrical shock hazard may be present if these precautions are not followed.

Removing the Right Cover Assembly

Removing the Right Cover Assembly provides access to the Memory

Module, MPWA, and all MPWA connectors (Stepper Motor, Servo

Motor, Fan, Display, Power Supply and Trailing Cable).

To remove the Right Cover Assembly:

1. Remove the Top Cover. Keep the right end of the Top Cover tilted up so that the Retracting Stop and Compression Spring don’t fall out.

2. You may find it helpful to wrap a rubberband around the connector clips on the parallel port to hold them out of the way while the

Right Cover Assembly is being removed.

3. Move the Carriage Assembly to the middle of the Platen.

Assembly\Disassembly 5-2

CadJet T-200 Service Manual

4. Using a #2 Phillips screwdriver, loosen the top and front captive fastener screws and remove the bottom back screw on the inside of the Right Cover. The front captive fastener screw can be accessed by inserting the screwdriver into the groove on the

Display Assembly as shown on the lower right side of Figure 5-1.

LOOSEN CAPTIVE

FASTENER SCREWS

REMOVE SCREWS

Figure 5-1. Removal of Right Cover Assembly.

5. Remove the Right Cover. Move the Right Cover towards the back of the unit as you remove it so that it clears the parallel port on the back of the unit. Be very careful when removing the

Right Cover so that the LED’s on the MPWA are not damaged.

Assembly\Disassembly 5-3

CadJet T-200 Service Manual

Removing the MPWA Connectors

CAUTION

Do not pull the cables from the connectors on the J3 location (Display Cable) and J6 location (Trailing Cable) ubtil they are unlocked. Doing so may cause damage to the cable. Do not pull the lock too hard as you unlock the connectors or the lock may break off.

Disconnect all 6 connectors on the MPWA so that the MPWA can be removed (see Figure 5-2 for positions of the connectors), as follows:

J10

STEPPER

MOTOR

CAPTIVE

FASTENER

J6

TRAILING

CABLE

CAPTIVE

FASTENER

SCREW

J9

POWER

SUPPLY

J3

DISPLAY

ASSEMBLY

SCREW

J7

SERVO

MOTOR

SCREW

J5

VACUUM/

COOLING FAN

Figure 5-2. MPWA Connection and Screw Locations.

Assembly\Disassembly 5-4

CadJet T-200 Service Manual

1. Disconnect the Display Cable connector at the J3 location. Pull forward on the connector lock and remove the flex cable from the connector.

2. Disconnect the Trailing Cable connector at the J6 location. Use the thumb and forefinger to pull forward on the connector lock and remove the Trailing Cable from the connector.

3. Disconnect the Servo Motor connector (Red and Blue wires) at the

J7 location. Grasp the Servo Motor connector with the thumb and forefinger and pull straight out.

4. Disconnect the Fan connector (Red and Black wires) at the J5 location. Grasp the Fan connector with the thumb and forefinger and pull straight out.

5. Disconnect the Stepper Motor connector at the J10 location. Grasp the Stepper Motor connector with the thumb and forefinger and pull straight out.

6. Disconnect the Power Supply connector at the J9 location. Grasp the Power Supply connector with the thumb and forefinger and pull straight out.

Removing the MPWA

CAUTION

Integrated circuits can be weakened or inactivated by electrical discharge. It is recommended that you be grounded to a static station by an ESD wrist strap to prevent ESD damage.

Assembly\Disassembly 5-5

CadJet T-200 Service Manual

To remove the MPWA:

1. Put on an ESD wrist strap.

2. Use a #2 6” Phillips screwdriver to remove the three remaining screws holding the MPWA onto the side plate. See Figure 5-2 for locations. Hold the top of the MPWA while removing the screws.

3. Place the MPWA in an ESD bag (anti-static bag) in preparation for shipment to ENCAD for replacement or repair, or if it is to be stored for repair at your facility.

Removing the Right Side Plate

Figure 5-3. Removal of the Right Side Plate.

To remove the Right Side Plate:

1. Remove the Top Cover.

2. Remove the Right Cover Assembly.

3. Disconnect the MPWA connections and remove the MPWA.

Assembly\Disassembly 5-6

CadJet T-200 Service Manual

4. While holding the Right Side Plate, remove the screws securing the side plate to the Platen. See Figure 5-3.

5. Slowly pull the Right Side Plate away from the Platen while feeding the cables through the side plate.

Reinstalling the Right Side Plate

To reinstall the Right Side Plate, reverse the steps followed when removing the Right Side Plate:

1. Feed the cables through the appropriate holes in the side plate then hold it in place against the Platen.

2. Reinstall the Right Side Plate to the Platen by securing with the screws. Torque to 15 in-lbs.

3. Reinstall the MPWA and all MPWA connections.

4. Reinstall the Right Cover Assembly and the Top Cover.

Reinstalling the MPWA

To reinstall the MPWA, reverse the steps followed when removing the

MPWA:

1. Put on an ESD wrist strap.

2. Remove the MPWA from the ESD bag.

3. Hold the MPWA in place on the Right Side Plate while putting in the correct three screws in the holes located on Figure 5-2. Use a

#2 Phillips screwdriver to torque the screws to 6 in-lbs.

Reinstalling the MPWA Connectors

1. Reinstall the Stepper Motor connector at J10.

2. Reinstall the Fan connector (Red and Black wires) at J5.

3. Reinstall the Servo Motor connector (Red and Blue wires) at J7.

Assembly\Disassembly 5-7

CadJet T-200 Service Manual

4. Reinstall the Trailing Cable at J6.

When inserting the Trailing Cable connector, apply pressure on the locking clip towards the MPWA in order to lock the connector in place. Test to make sure the connector is locked by pulling slightly on the cable to see if it comes out.

5. Reinstall the Display Cable at J3.

When inserting the Display Cable connector, apply pressure on the locking clip towards the MPWA in order to lock the connector in place. Test to make sure the connector is locked by pulling slightly on the cable to see if it comes out.

Memory Module Removal

This printer ships with a 32MB memory module installed on the

MPWA. If the MPWA is to be returned to ENCAD it will be returned with a factory installed 32MB module.

If a module of higher capacity has been installed by the customer, it is recommended that this memory module be replaced with the original module before returning the MPWA to ENCAD.

CAUTION

Integrated circuits can be weakened or inactivated by electrical discharge. It is recommended that you be grounded to a static station by an ESD wrist strap to prevent ESD damage.

The memory module is secured by locking tabs located at both of the narrow edges of the module. To remove the memory module, pry both tabs away from the module at the same time. This will unlock the module and lift it out of the slot for easy removal.

Assembly\Disassembly 5-8

CadJet T-200 Service Manual

Memory Module Installation

The memory module is secured by locking tabs located at both of the narrow edges of the module. To install the memory module, verify that the locking tabs are in the unlocked position then align the module over the slot, ensuring that the module is oriented properly. While applying equal pressure to both edges of the module press the module down into the slot until both tabs are locked into the module.

Reinstalling the Right Cover Assembly

1. Make sure that all wires are inside the Right Cover Assembly area as you begin to put the Right Cover Assembly back on so that none of the wires are pinched between the Right Cover Assembly and the

Right Side Plate.

2. Align the back of the Right Cover Assembly over the connector clips on the parallel port. Remove the rubber band holding the connector clips together.

3. Reinsert all three screws on the inside of the Right Cover Assembly.

See Figure 5-1. All three screws should be torqued to 15 in-lbs. Do

not overtighten.

4. Put the Top Cover back on.

Removing the Left Cover

Removing the Left Cover provides access to the Power Supply and the

Power Entry Module.

To remove the Left Cover, proceed as follows:

1. Remove the Top Cover. Keep the right end of the Top Cover tilted up so that the Retracting Stop and Compression Spring don’t fall out.

2. While holding the Left Cover, remove the three screws securing the

Left Cover. The three screws are removed from the the left side of the cover as shown on Figure 5-4.

Assembly\Disassembly 5-9

CadJet T-200 Service Manual

Figure 5-4. Removal of the Left Cover.

Reinstalling the Left Cover

To reinstall the Left Cover, proceed as follows:

1. While holding the Left Cover, reinstall the three screws that secure the Left Cover. The four screws are reinserted as shown on

Figure 5-4. All screws should be torqued to 15 in-lbs. Do not

overtighten.

2. Put the Top Cover back on.

Removing the Servo Motor

To remove the Servo Motor, proceed as follows:

1. Disconnect the power cord and the interface cables.

2. Remove the Top Cover.

3. Remove the Trailing Cable Cover from the Y-Arm Assembly in order to have easier access to the Frame Tensioner and to the screws that hold the Servo Motor in place.

Assembly\Disassembly 5-10

CadJet T-200 Service Manual

4. Remove the Right Cover, MPWA and Right Side Plate for removal of the Servo Motor.

SERVO MOTOR

PULLEY

CUT-OUT

REAR

SCREW

CARRIAGE

BELT

FRONT

SCREW

Figure 5-5. Removal of Servo Motor.

5. Use a #2 Phillips screwdriver to remove the back screw on the

Servo Motor. See Figure 5-5. While using extreme care not to damage the Trailing Cable, align the screwdriver through the cutout on the Stabilizer Bracket to get a good angle on the screwhead.

6. Loosen the front screw on the Servo Motor.

7. See Figures 5-5 and 5-6. While you compress the back of the

Frame Tensioner with your left index finger, use your right hand to gently remove the Carriage Belt from the Servo Motor pulley.

Assembly\Disassembly 5-11

CadJet T-200 Service Manual

PUSH IN HERE

TO SLACKEN

CARRIAGE BELT

Figure 5-6. Compression of Frame Tensioner.

8. Support the Servo Motor with one hand and remove the front screw.

9. Remove the ServoMotor out of the right side of the Platen.

Reinstalling the Servo Motor

1. Reinsert the Servo Motor inside the opening on the right of the

Platen.

2. Guide the Servo Motor into the Platen.

3. Push the Servo Motor pulley through the top of the Platen and Y-

Arm and, at the same time, rotate the Servo Motor so that the connector is facing the BACK side of the Platen. Align the screw holes with the screw hole openings.

4. Insert one screw into the Servo Motor and tighten it slightly.

5. Insert the second screw into the Servo Motor and tighten it. Make sure both screws are torqued to 15 in-lbs.

6. Compress the back of the Frame Tensioner with your left index finger and wrap the Carriage Belt over the Servo Motor pulley.

Make sure that the three guides on the inside of the belt are inserted in the three pulley grooves.

Assembly\Disassembly 5-12

CadJet T-200 Service Manual

7. Move the Carriage Assembly back and forth to check the Carriage

Belt tension.

8. Reinstall the Trailing Cable Cover and the Top Cover.

Removing the Display Assembly

1. Disconnect the power cord and the interface cables.

2. Remove the Right Cover Assembly.

3. Disconnect the Display Cable connector at the J3 location on the

MPWA. Pull forward on the connector lock and remove the flex cable from the connector.

Figure 5-7. Removal of Display Assembly.

4. Using a #1 Phillips screwdriver, remove the 2 screws from the bottom of the Display Assembly. See Figure 5-7.

Assembly\Disassembly 5-13

CadJet T-200 Service Manual

Reinstalling the Display Assembly

Reinstall Display Assembly by reversing the procedure used to remove it. When reinserting the Display Cable, make sure that the silver fingers on the end of the cable face the Display PWA. Route the

Display Cable over the groove on the top of the Right Side Plate, down between the Right Side Plate and the MPWA and around to the front of the MPWA near the J3 connector. Torque Display Assembly screws to 6 in-lbs.

Removing the Service Station Assembly

SERVICE

STATION

RELEASE

TAB

Figure 5-8. Service Station Removal.

1. Place the Top Cover in the open position.

2. Move the Carriage Assembly to the left side of the Slide Shaft.

Assembly\Disassembly 5-14

CadJet T-200 Service Manual

3. Reach into the Right Cover and pull back on the Service Station release tab located on the far side of the Service Station. See

Figure 5-8.

4. Raise the right side of the Service Station out of the Platen.

5. Lift out the left side of the Service Station from the Platen and remove the Service Station. Moving the Service Station farther to the right might be required to release the left side of the Service

Station.

Reinstalling the Service Station Assembly

1. To install the Service Station, position the Service Station inside the Right Cover and place the left side of the Service Station into the Platen.

2. Push down on the right side of the Service Station until the

Service Station snaps into place.

3. Slide the Carriage Assembly to the right and back into the home position. Lower the Top Cover.

Assembly\Disassembly 5-15

CadJet T-200 Service Manual

Remove the Carriage Assembly, Carriage Belt and the Frame Tensioner

1. Remove the Top Cover and Trailing Cable Cover.

2. Remove the Left and Right Covers.

Figure 5-9. Electronics Cover Removal.

Assembly\Disassembly 5-16

CadJet T-200 Service Manual

3. With a flathead screwdriver, press the Electronics Cover tab located in the upper slot on the left side of the Carriage Assembly. See

Figure 5-9. Lift up on the front left side of the Carriage Cover until it comes part way off of the Carriage Assembly. Then lift up on the front right side of the Carriage Cover and move the Carriage Cover slightly to the left so that the back of it clears the Back Support

Bracket.

4. Lift up on the connector lock to unlock the Trailing Cable connector

(J6) on the Carriage PWA and remove the end of the Trailing Cable.

LATCH

Figure 5-10. Strain Relief Removal/Installation.

5. Remove the Trailing Cable and Strain Relief from the Carriage

Assembly by releasing the latch on the left lower side of the Strain

Relief and lifting it off of the Carriage Assembly. See Figure 5-10.

6. Compress the back of the Frame Tensioner and use the end of a screwdriver to remove the Carriage Belt from the Servo Motor pulley. See Figures 5-5 and 5-6.

7. Remove the Compression Spring from the Frame Tensioner and set it aside.

Assembly\Disassembly 5-17

CadJet T-200 Service Manual

8. Push the Carriage Belt through the Frame Tensioner enough to remove the Idler Pulley Assembly from the Frame Tensioner, and then set aside the Idler Pulley Assembly and the Frame

Tensioner. See Figure 5-11.

COMPRESSION SPRING FITS OVER THIS POST

COMPRESSION SPRING

FRAME TENSIONER

CARRIAGE BELT

THIS NOTCH IN THE

FRAME TENSIONER

MUST FIT OVER ...

... THIS NOTCH IN

THE END OF THE

C-BRACKET

IDLER PULLEY ASSEMBLY (SIDE WITH

THICKER OUTER RING OF PLASTIC MUST

FACE UP.)

Figure 5-11. Frame Tensioner.

9. Slide the Carriage Assembly and Drive Belt off the left side of the

Slide Shaft.

10. Once the Carriage Assembly is removed from the Slide Shaft, turn it over so that you can see the Belt Clamp. See Figure 5-12.

11. To disengage the Carriage Belt from the Belt Clamp, push the

Carriage Belt away from the left post of the Belt Clamp and gently lift up until the bottom edge of the Carriage Belt clears the top of the left post.

Assembly\Disassembly 5-18

CadJet T-200 Service Manual

BUMP

CARRIAGE BELT

RIGHT POST OF

BELT CLAMP

LEFT POST OF

BELT CLAMP

Figure 5-12. Carriage Belt Clamp.

12. Push the Carriage Belt away from the right post of the Belt

Clamp and gently lift up to finish removing the Carriage Belt from the Belt Clamp.

CAUTION

Failure to use an approved antistatic bag for storage or shipment may cause damage to the MPWA and affect the Warranty.

13. Place the Carriage Assembly in an ESD (antistatic) bag in preparation for shipment to ENCAD for replacement or repair, or if it is to be stored for repair at your facility.

Assembly\Disassembly 5-19

CadJet T-200 Service Manual

Remove the Carriage PWA

CAUTION

Integrated circuits may become weakened or damaged by electrical discharge. Do not touch or work near integrated circuits without wearing an ESD wrist strap.

1. Perform the Carriage Assembly, Carriage Belt, and the Frame

Tensioner Removal procedures to remove the Carriage Assembly from the Slide Shaft.

2. Put on an ESD wrist strap.

3. Unlock the connectors and remove all flex cables on the Carriage

PWA.

LATCH

TAB

SLOT

Figure 5-13. Carriage PWA Removal/Installation.

Assembly\Disassembly 5-20

CadJet T-200 Service Manual

4. Unlock the latch on the right end of the Carriage Assembly and lift up the right end of the Carriage PWA. See Figure 5-13.

5. Slide the Carriage PWA to the right to remove the tab on the left end of the Carriage PWA from the slot in the Carriage Assembly.

CAUTION

Failure to use an approved antistatic bag for storage or shipment may cause damage to the Carriage PWA and affect the Warranty.

6. Place the Carriage PWA in an ESD bag (antistatic bag) in preparation for shipment to ENCAD for replacement or repair, or if it is to be stored at your facility for repair.

Install the Carriage PWA

1. Put the tab on the left end of the Carriage PWA into the slot in the left side of the Carriage Assembly. See Figure 5-13.

2. Ensure that no flex cables are underneath the Carriage PWA.

3. Push down the right end of the Carriage PWA until the latch snaps into place.

4. Reattach all flex cables on the Carriage PWA.

5. Perform the Install the Carriage Assembly, Carriage Belt, and the

Frame Tensioner procedures to reinstall the Carriage Assembly.

Remove the Paper Sensor or the Encoder Sensor

1. Perform the Remove the Carriage Assembly, Carriage Belt, and the

Frame Tensioner procedures to remove the Carriage Assembly from the Slide Shaft.

Assembly\Disassembly 5-21

CadJet T-200 Service Manual

TO REMOVE PAPER

SENSOR BOARD, GRASP

HERE AND PULL UP

PUSH DOWN ON

CLIP, PUSH DOWN

ON ENCODER,

THEN PULL OUT

THIS PIECE OF PLASTIC

(ONE ON EACH SIDE) MUST

CLEAR THE RIDGES ON THE

UNDERSIDE OF THE HOLDER

Figure 5-14. Paper and Encoder Sensor Removal.

2. To remove the Paper Sensor: a. Unlock the connector at J3 and remove the flex cable.

b. Turn the Carriage Assembly over and hold it while firmly grasping the Paper Sensor between thumb and index finger. See

Figure 5-14.

c. Pull straight up on the Paper Sensor and remove it from the

Carriage Assembly.

Assembly\Disassembly 5-22

CadJet T-200 Service Manual

3. To remove the Encoder Sensor: a. Unlock the connector at J2 and remove the flex cable.

b. Turn the Carriage Assembly over and lay it with the top side facing down.

c. Push down on the plastic clip and at the same time push down on the Encoder until the plastic pieces on each side of the Encoder clear the ridges which hold it in place. Then pull it straight out.

See Figure 5-14.

Install the Paper Sensor or the Encoder Sensor

GROOVES

2

ALIGN SIDES

OF PAPER

SENSOR

BOARD

BETWEEN

GROOVES

AND PUSH

STRAIGHT

DOWN

1

ROUTE FLEX

THROUGH SLOT

INSIDE THE

CARRIAGE ASSEMBLY

1

PUSH DOWN ON CLIP.

PUSH ENCODER IN OVER

CLIP. ENCODER MUST

SLIDE PAST THE RIDGES

AND SNAP INTO PLACE

Figure 5-15. Paper and Encoder Sensor Installation.

1. To install the Paper Sensor: a. Turn the Carriage Assembly so that the bottom side of it is facing up.

b. Route the flex on the Paper Sensor through the slot in the

Carriage Assembly. Make sure the flex cable goes all the way through and does not curl under the Carriage PWA.

Assembly\Disassembly 5-23

CadJet T-200 Service Manual c. Grasp the Paper Sensor between thumb and index finger and guide the sides of the board into the grooves on each side of the opening. See Figure 5-15.

d. Push the Paper Sensor board down into the Carriage Assembly until it snaps firmly into place.

e. Turn the Carriage Assembly over and insert the Paper Sensor flex cable into the connector at J7.

f. Push both sides of the connector lock shut at the same time.

2. To install the Encoder Sensor: a. Turn the Carriage Assembly so that the bottom side of it is facing up.

b. Push down on the plastic clip and slide the back of the Encoder

Sensor over it.

c. Push the Encoder Sensor in past the ridges until the Encoder

Sensor snaps into place.

d. Turn the Carriage Assembly over and insert the Encoder flex cable into the connector at J5.

e. Push both sides of the connector lock shut at the same time.

3. Perform the Carriage Assembly, Carriage Belt, and the Frame

Tensioner Reinstallation procedures to reinstall the Carriage

Assembly.

Replacing the Carriage Bushings

1. If there is not enough space on both sides of the Slide Shaft to remove the Carriage bushings, perform the Carriage Assembly,

Carriage Belt, and the Frame Tensioner Removal procedures to remove the Carriage Assembly from the Slide Shaft.

Assembly\Disassembly 5-24

CadJet T-200 Service Manual

CARRIAGE

BUSHING

LATCH

Figure 5-16. Carriage Bushing Removal.

2. Use a flat tip screwdriver to push up on the latch which holds the

Carriage Bushing in place. See Figure 5-16.

3. Pull the Carriage Bushing out of the Carriage Assembly.

4. Repeat Steps 2 and 3 for the other Carriage Bushing.

Assembly\Disassembly 5-25

TABS

CadJet T-200 Service Manual

Figure 5-17. Carriage Bushing Installation.

5. Orient the new Bushing as shown in Figure 5-17 so that the metal tab on top of the Bushing goes into the Carriage Assembly first.

6. Push the Bushings in until they snap into place.

7. Perform the Reinstall the Carriage Assembly, Carriage Belt, and the Frame Tensioner procedures to reinstall the Carriage Assembly if Carriage was removed.

Reinstalling the Carriage Assembly, Carriage Belt and the Frame Tensioner

1. To install the Belt onto the Carriage Assembly, the “bumps” on the belt (where the ends of the belt are joined together to make the belt continuous) must be positioned between the left and right posts of the Belt Clamp. See Figure 5-12.

2. Slide the Carriage Belt between the right post and the middle post and guide it down into the Belt Clamp. Then slide the Carriage Belt between the left post and the middle post and finish placing the

Carriage Belt into the Belt Clamp.

3. Check the position of the Carriage Belt to make sure it matches

Figure 5-12.

4. Make sure the left end of the Trailing Cable extends out beyond the left end of the Trailing Cable Support Assembly.

Assembly\Disassembly 5-26

CadJet T-200 Service Manual

5. Slide the Carriage Assembly onto the left end of the Slide Shaft, making sure that the Encoder Strip fits into the slot in the Slider and the Encoder on the Carriage PWA. Guide the belt while sliding the Carriage Assembly from left to right on the Slide

Shaft.

6. Move the Carriage Assembly to the left end of the Slide Shaft and align the left bushing on the Carriage Assembly with the left end of the Slide Shaft.

7. Insert the Strain Relief (with Trailing Cable) onto the Carriage

Assembly by sliding it onto the Strain Relief Support until it snaps firmly into place. See Figure 5-10.

8. Place the Trailing Cable into the J6 connector lock on the

Carriage PWA. Make sure the silver fingers on the Trailing

Cable are fully inserted into the lock and slide both sides of the connector lock shut at the same time.

9. Place the right side of the back of the Electronics Cover under the Trailing Cable Support Assembly and gently press down on the ends of the Electronics Cover until the latches snap into the

Carriage Assembly.

10. Slide the Carriage Assembly to about the middle of the Slide

Shaft and stretch out the Carriage Belt.

11. Insert the Carriage Belt into the Frame Tensioner so that the belt extends about an inch past the Frame Tensioner.

12. Holding the Carriage Belt and Frame Tensioner, insert the Idler

Pulley Assembly into the loop of the belt. Make sure that the side of the Idler Pulley Assembly with the thicker outer ring of plastic is facing up. See Figure 5-11.

13. Once the Idler Pulley Assembly is in position, pinch the belt to hold the Idler Pulley Assembly in place and pull it into the

Frame Tensioner so that the axle rests in the V-shaped groove in the Frame Tensioner.

14. Insert the Compression Spring into the opening in the back of the Frame Tensioner so that the end of the spring fits over the post inside the opening.

Assembly\Disassembly 5-27

CadJet T-200 Service Manual

15. Fit the Compression Spring over the post at the back of the Y-Arm

Assembly.

16. Fit the notch in the front end of the Frame Tensioner over the notch in the front of the Y-Arm Assembly.

17. Depress the back of the Frame Tensioner and slip the Carriage Belt over the Servo Motor pulley. Make sure that the guides in the

Carriage Belt are properly fitted over the Servo Motor pulley.

18. Gently move the Carriage Assembly from end to end and make sure that the Carriage Belt is not rubbing against any other parts.

Removing the Trailing Cable

1. Remove the Top Cover.

2. Remove the Trailing Cable Cover.

3. Remove the Right Cover Assembly.

4. Disconnect the Trailing Cable connector at the J6 location on the

MPWA. Use the thumb and forefinger to pull forward on the connector lock and remove the Trailing Cable from the connector.

5. With a flathead screwdriver, press the Electronics Cover tab located in the upper slot on the left side of the Carriage Assembly. See

Figure 5-9. Lift up on the front left side of the Carriage Cover until it comes part way off of the Carriage Assembly. Then lift up on the front right side of the Carriage Cover and move the Carriage Cover slightly to the left so that the back of it clears the Back Support

Bracket.

6. Lift up on the connector lock to unlock the Trailing Cable connector

(J6) on the Carriage PWA and remove the end of the Trailing Cable.

7. Remove the Trailing Cable and Strain Relief from the Carriage

Assembly by releasing the latch on the left lower side of the Strain

Relief and lifting it off of the Carriage Assembly. See Figure 5-10.

8. Pull the Trailing Cable away from the double-sided tape on the

Stabilizer Bracket. Remove the Trailing Cable from the plotter unit.

Assembly\Disassembly 5-28

CadJet T-200 Service Manual

Reinstalling the Trailing Cable

1. Apply two new pieces of double sided tape to the Stabilizer Bracket.

Ensure that the tape is in the same location as the original tape was. Do not remove the top protective cover on the tapes yet.

2. Place the Trailing Cable on the Stabilizer Bracket.

3. Route the right end of the Trailing Cable through the Right Side

Plate and connect the Trailing Cable connector at the J6 location on the MPWA. Be sure to slide both sides of the connector lock shut at the same time.

4. Insert the Trailing Cable into the Strain Relief Assembly. Insert the Strain Relief (with Trailing Cable) onto the Carriage Assembly by sliding it onto the Strain Relief Support until it snaps firmly into place.

5. Connect the Trailing Cable to the J6 connector on the Carriage

PWA. Slide both sides of the connector lock shut at the same time.

6. Press the Trailing Cable down onto the double-sided tape on the

Carriage PWA.

7. Move the Carriage Assembly to the very left end of the Slide Shaft.

8. Remove the top protective cover on the 2” double-sided tape on the right end of the Stabilizer Bracket and press the right end of the

Trailing Cable onto the tape.

9. With the Carriage Assembly still at the very left end of the Slide

Shaft and with the Trailing Cable still in line remove the top protective cover on the 2” double-sided tape in the center of the

Trailing Cable and press the Trailing Cable onto the tape.

10. Slide the Carriage Assembly back and forth several times to make sure that the Trailing Cable does not catch on anything and to make sure that the Carriage Assembly will travel the full length of the Slide Shaft.

11. Reinstall the Electronics Cover and Right Cover Assembly. Also reinstall the Trailing Cable Cover and Top Cover.

Assembly\Disassembly 5-29

CadJet T-200 Service Manual

Removing the Power Supply and ON/OFF Switch

NOTE

To gain access to all the screws that secure the Power

Supply to the Platen the left leg must be loosened and turned or removed entirely from the Platen. To the left leg assembly first remove the media basket. Then remove three screws and loosen the last screw (see Figure

5-18) that connects the left leg assembly to the platen.

While holding the plotter up, turn the leg assembly in a clockwise direction to reveal the other two Power Supply

Assembly screws. Once the screws are revealed, tighten the leg assembly to support the plotter.

1. Remove the Top Cover and the Left Cover.

2. Using a #2 Phillips screwdriver, remove the 4 screws on the bottom of the Platen which hold the Power Supply in place.

3. Pull the Power Supply part way out of the Platen, grasp the connector on the black and white ON/OFF Switch Cable, and remove the cable from the Power Supply.

4. Pull the Power Supply the rest of the way out of the Platen, grasp the connector on the Power Cable coming from the MPWA, and remove the Power Cable from the Power Supply.

5. If the ON/OFF Switch needs to be replaced, push the top of the switch out of the back of the Platen, pry up on the bottom of the switch with a screwdriver (from inside the Platen), and push the switch out of the Platen. Remove the ground wire from the Platen.

Assembly\Disassembly 5-30

REMOVE

CadJet T-200 Service Manual

LOOSEN

Figure 5-18. Revealing the Power Supply Screws.

Assembly\Disassembly 5-31

CadJet T-200 Service Manual

Reinstalling the Power Supply and ON/OFF Switch

LOWER ROLLER

DRIVE SHAFT

SUPPORT, DRIVE SHAFT

FOAM BLOCK

STEPPER MOTOR

ASSY

POWER ENTRY

MODULE

POWER SUPPLY

CABLE

FAN ASSEMBLY

POWER SUPPLY

CABLE

POWER

SUPPLY

ASSY,

BRACKET,

DRIVE SHAFT

EXHAUST

SNAP PLUG

Figure 5-19. Inner Platen Parts.

1. If the ON/OFF Switch was removed, push the new switch into place. Position it so the switch is on top and the prongs for the

Power Cord are on the bottom. Connect the ground wire to the inside of the Platen. Torque to 6 in-lbs.

NOTE

The ground wire from the power entry module must be on the bottom and make good contact with the platen surface.

Assembly\Disassembly 5-32

CadJet T-200 Service Manual

2. Connect the Power Cable coming from the MPWA to the connector on the Power Supply. Make sure that the ground from the Power Cable is still connected to the inside of the Platen, at the same location as the ground from the ON/OFF Switch.

3. Insert the Power Supply part way into the Platen.

4. Connect the Power Switch cable to the connector on the Power

Supply.

5. Position the Power Supply in place inside the Platen and insert the screws through the bottom of the Platen and into the Power

Supply. Use a #2 Phillips screwdriver to torque the screws to 6 in-lbs. (Do not overtighten them).

6. Reinstall the Left Cover and the Top Cover.

Removing the Stabilizer Bracket and Encoder

Strip

1. Remove the Cartridges and the Top Cover.

2. Remove the Left Cover.

3. Remove the Trailing Cable Cover, Frame Tensioner and Carriage

Assembly.

4. Remove the Trailing Cable from the tapes on the Stabilizer

Bracket. Discard the Trailing Cable, it cannot be reused.

Assembly\Disassembly 5-33

CadJet T-200 Service Manual

Figure 5-20. Stabilizer Bracket Removal.

5. Use a 7/64 Hex Nut Driver to remove the three screws from the back of the Y-Arm which hold the Stabilizer Bracket on the Y-Arm and remove the Stabilizer Bracket. See Figure 5-20.

Reinstalling the Stabilizer Bracket and Encoder

Strip

The new Stabilizer Bracket will already have the new Encoder Strip as well as new tapes for the Trailing Cable attached to it. Refer to Figure 5-20 during this procedure.

To reinstall the Stabilizer Bracket:

1. Attach the Stabilizer Bracket to the Y-Arm with the three screws which go through the back of the Y-Arm into the Stabilizer Bracket.

It is easier to do this if you first attach one end, then the other end, and then the center. Put the screws down to the bottom of the slot

Assembly\Disassembly 5-34

CadJet T-200 Service Manual in the Y-Arm and use the 7/64 Hex Nut Driver to tighten them.

(The exact positioning of the screws in the slot will be done later during the Carriage Height Adjustment in Chapter 3.)

2. Reinstall the Carriage Assembly. (The Trailing Cable Cover will be reattached later.)

3. Slide the Carriage Assembly back and forth a few times to make sure it moves easily. Make certain that it travels easily all the way to the left end of the Slide Shaft so that the Cutter activates.

4. Once you have checked the movement of the Carriage Assembly, follow the procedures for attaching the Trailing Cable to the tapes on the Stabilizer Bracket.

5. Reattach the Trailing Cable Cover.

6. Reattach the Left Cover.

7. Reinstall the Cartridges and the Top Cover.

8. Perform the Carriage Height Adjustment procedure located in

Chapter 3.

Disassembly of Plotter Before Removing the Inner

Platen Parts

Refer to previous sections of this chapter and Figure 5-21 as necessary during this procedure. To obtain access to the Inner Platen Parts:

1. Remove the Top Cover and the Left Cover.

2. Remove the Right Cover Assembly.

3. Disconnect all the connectors from the MPWA.

4. Remove the MPWA.

5. Remove the Right Side Plate.

6. Remove the Display Assembly.

Assembly\Disassembly 5-35

CadJet T-200 Service Manual

CAUTION

DO NOT REMOVE SCREWS

TO Y-ARM ASSY

RIGHT

ROLLGUIDE

LEFT

COVER

SCREWS

(4)

LEFT

ROLLGUIDE

RIGHT

SIDE PLATE

SCREWS

(4)

Figure 5-21. Disassembly of Plotter Prior to Removing the

Inner Platen Parts.

7. Remove the Left and Right Rollguides from the back of the Platen.

8. Remove the Trailing Cable Cover.

9. Remove the Power Supply.

10. Remove the Servo Motor.

11. Clean and remove the entire Service Station.

Assembly\Disassembly 5-36

CadJet T-200 Service Manual

Removing the Inner Platen Parts

Refer to Figure 5-20 and Figure 5-22 during this procedure.

REMOVE (2)

REMOVE (2)

REMOVE (2)

CENTER DRIVE SHAFT SUPPORT

LEFT DRIVE SHAFT SUPPORT

Figure 5-22. Removal of Lower Drive Shaft Screws.

1. Lay Platen on its back.

2. Use a flat screwdriver to pry out the Snap Plug on the bottom side of the Platen.

3. Using a #1 6” or 8” Phillips screwdriver, remove the four screws on the bottom of the Platen which hold the Exhaust in place.

4. Insert your left hand into the opening for the Exhaust and hold the

Fan Assembly in place while using a #2 6” or 8” Phillips screwdriver to remove the 3 flat-head screws on the bottom of the

Platen which hold the Fan Assembly in place. Do not allow the screws to come out at an angle.

5. Lay the Platen on its bottom.

Assembly\Disassembly 5-37

CadJet T-200 Service Manual

6. Using a #1 6” or 8” Phillips screwdriver, remove the 4 black flathead screws which hold the left and middle Drive Shaft Supports in place. There are two screws in the center of the Platen, and two screws approximately three inches to the left of the left brass bracket. See Figure 5-22.

7. Remove the left Drive Shaft Support through the left end of the

Platen and the middle Drive Shaft Support through the Snap Plug opening.

NOTE

Be very careful when removing the Foam Block so that it does not tear. If it does tear, however, it must be replaced with a new one so that the Inner Platen has sufficient vacuum.

8. Remove the Foam Block which is beside the Stepper Motor

Assembly by putting your index finger into the opening in the top of the Foam Block and pulling it towards you. See Figure 5-23.

FRONT OF

PLATEN

FOAM

BLOCK

ALL CABLES PASS THROUGH THE

FOAM BLOCK THROUGH THIS CORNER

Figure 5-23. Removing the Foam Block.

Assembly\Disassembly 5-38

CadJet T-200 Service Manual

9. Using a #1 6” or 8” Phillips screwdriver, loosen but do not

remove the 2 black flat-head screws which hold the Stepper Motor

Assembly. Hold the Stepper Motor Assembly with your right hand so it does not drop suddenly and use your left hand to finish unscrewing the two screws and remove them.

10. Reach into the Fan opening on the bottom of the Platen and use your fingertips to hold up the Fan Assembly so that it clears the openings, screws, and cap nuts on the inside of the Platen while simultaneously pulling the Stepper Motor Assembly and Lower

Drive Shaft Assembly out of the right end of the Platen.

Removing the Stepper Motor

NOTE

If removing only the Stepper Motor, do not remove the

Bowed Washer, Washer and Retaining Ring which are between the end of the Lower Drive Assembly and the

Stepper Motor Bracket.

NOTE

Do not remove the 20 Teeth Gear from the Stepper Motor.

NOTE

Do not remove the Oilite Bushing from the Stepper Motor

Bracket. (If it should happen to fall out, press it back in as far as it will go.)

NOTE

Do not clean the Oilite Bushing with alcohol. Wipe it with a clean, dry cloth only.

Assembly\Disassembly 5-39

CadJet T-200 Service Manual

PIVOT NUT

OILITE

BUSHING

RETAINER

SPRING

SCREW

BOWED WASHER

WASHER

RETAINING RING

SPRING

PIVOT SCREW

RETAINING RING

Figure 5-24. Lower Drive Assembly and Stepper Motor

Assembly.

1. Once the Inner Platen Parts have been removed, remove the

Stepper Motor from the Stepper Motor Bracket by unhooking the

Extension Spring from the post on the Stepper Motor Bracket. See

Figure 5-24.

2. Unscrew the Retainer Spring Post from the Spring Post and remove them from the Stepper Motor Bracket and Stepper Motor Assembly.

3. Unscrew the Pivot Screw and Pivot Nut and remove them from the

Stepper Motor Bracket and Stepper Motor Assembly.

4. Remove the Stepper Motor from the end of the Lower Drive

Assembly.

Assembly\Disassembly 5-40

CadJet T-200 Service Manual

5. If you are replacing the Stepper Motor Bracket, you will need to remove the Retaining Ring, Washer, and Bowed Washer which are between the end of the Lower Drive Assembly and the

Stepper Motor Bracket.

Reinstalling the Stepper Motor

1. If you are replacing the Stepper Motor, put the Stepper Motor

Bracket onto the Lower Drive Assembly and then put the Bowed

Washer, the Washer, and the Retaining Ring on over the end of the Lower Drive Assembly. Make sure that the Retaining Ring snaps into the groove in the end of the Lower Drive Assembly.

2. Gently place the Stepper Motor Assembly onto the Stepper Motor

Bracket. Be careful not to damage the gears. Make sure that the gears are meshing with each other.

3. Use the Pivot Screw and Pivot Nut to secure the Stepper Motor

Assembly to the Stepper Motor Bracket. Torque to 6 in-lb.

4. Hook the Extension Spring onto the Spring Post.

5. Place the Spring Post through the Stepper Motor Assembly and the Stepper Motor Bracket and secure it with the Retainer

Spring Post. Torque to 6 in-lb.

6. Hook the Extension Spring onto the post on the Stepper Motor

Bracket.

7. Complete the reinstallation of the Inner Platen Parts.

Reinstalling the Inner Platen Parts

Refer as needed to Figure 5-20, Figure 5-22 and Figure 5-23 during this procedure.

1. Insert the Lower Drive Shaft Assembly and Stepper Motor

Assembly part way into the right end of the Platen.

2. Place the Fan Assembly under the Lower Drive Shaft beside the right Lower Drive Gear. Make sure that the Fan Assembly wires face the right end of the Platen and the opening in the Fan

Assembly faces the left end of the Platen.

Assembly\Disassembly 5-41

CadJet T-200 Service Manual

3. Lay the Stepper Motor Assembly on the palm of your right hand and use your fingertips to hold up the Fan Assembly as you push the Lower Drive Shaft into the Platen. While inserting, you must lift the Fan Assembly over the cap nuts on the inside of the bottom of the Platen and make sure you do not strike the Lower Rollers or the Gear on the Lower Drive Shaft against the screws, cap nuts, or openings in the Platen.

4. Align the right Lower Drive Shaft Support with the screw holes and insert the screws. Using a #2 6” or 8” Phillips screwdriver, tighten them slightly.

5. Insert the middle Lower Drive Shaft Support through the Snap

Plug opening (see Figure 5-22), align it with the screw holes, and insert the screws. Using a #2 6” or 8” Phillips screwdriver, tighten them slightly.

6. Insert the left Lower Drive Shaft Support in the left end of the

Platen so that the shaft goes through the brass bushing in the support. The support should be oriented in the same manner as the support which is by the Stepper Motor. See Figure 5-22. Align it with the screw holes, and insert the screws. Using a #2 6” or

8” Phillips screwdriver, tighten them slightly.

7. Torque all the screws in the supports to 6 in-lbs.

8. Insert the Foam Block. Make sure that the Power Supply Cable is in the opening in the back of the Foam Block. Also make sure that the Stepper Motor Assembly and Fan Assembly cables are also at the back corner of the Foam Block. See Figure 5-23. Push the

Foam Block in until it is flush against the Stepper Motor Assembly.

Make sure it is not tilted at an angle.

9. Turn the Platen onto its back.

10. Reach through the opening for the Fan Assembly with your left hand, align the opening in the Fan Assembly with the right edge of the opening in the Platen, and align the three screw holes. If necessary, push the Power Supply Cable towards the back edge of the Platen so that it is out of the way of the Fan Assembly.

Assembly\Disassembly 5-42

CadJet T-200 Service Manual

11. Hold the Fan in place with your left hand and insert the screws.

Make sure that the screws go in straight. Using a #2 6” or

8” Phillips screwdriver, torque them to 15 in-lbs. Do not overtighten or the threads on the screw holes will strip.

12. Reinstall the Exhaust on the outside of the bottom of the Platen.

Using a #2 6” or 8” Phillips screwdriver, torque to 8 in-lbs.

13. Reinsert the Snap Plug in the bottom of the Platen and turn the

Platen onto its bottom side.

Reassembly of Plotter After Reinstalling the Inner

Platen Parts

1. Reinstall the Servo Motor.

2. Reinstall the Display Assembly.

3. Reinstall the Service Station Assembly.

4. Make sure the Ground from the Power Cable is still connected to the inside of the Platen, at the same location as the ON/OFF

Switch Ground. Reinstall the Power Supply.

5. Reinstall the Left and Right Rollguides.

6. Route all the wires from the Servo Motor Assembly, Stepper Motor

Assembly, Fan Assembly, and Power Supply through the bottom opening on the Right Side Plate. See Figure 5-23. Secure the

Right Side Plate to the Platen with four screws. See Figure 5-3.

8. Route the Trailing Cable (with the silver fingers facing up) through the top slot in the Right Side Plate.

9. Secure the MPWA to the Right Side Plate using three screws.

Make sure the Trailing Cable is not pinched between the stand off and the MPWA.

10. Bring the Trailing Cable around the bottom of the MPWA and connect it at the J6 connector. Make sure the silver fingers

face down when the Trailing Cable is inserted into the connector.

Assembly\Disassembly 5-43

CadJet T-200 Service Manual

11. Route the Display Cable through the top left edge in the Right Side

Plate. Bring the Display Cable down around the flat edge of the

MPWA. Connect the Display Cable at the J3 connector on the

MPWA. The silver fingers must face the back side of the

plotter when the Display Cable is inserted into the connector.

12. Reconnect the Servo Motor wire (Red and Blue) to the J7 connector, the Stepper Motor wire to the J10 connector, and the Fan wire (Red and Black) to the J5 connector. Reference Figure 5-2.

13. Reinstall the Trailing Cable Cover.

14. Reinstall the Right Cover Assembly. Make sure that none of the harnesses or cables are pinched between the cover assembly and the

Right Side Plate.

15. Reinstall the Left Cover.

16. Reinstall the Top Cover.

The entire plotter is now reassembled.

Removing the Upper Pinch Roller Supports

1. Remove the Top Cover and Left Cover.

2. Use the #1 Phillips Screwdriver to remove the 3 screws which secure the Trailing Cable Cover to the back of the Y-Bracket and remove the Trailing Cable Cover.

3. Depress the back of the Frame Tensioner (see Figure 5-6) and slip the Carriage Belt off the Servo Motor Pulley. (The Carriage Belt only needs to be loose during this procedure; it does not need to be removed. Lift both sides of the Carriage Belt out of the Y-Bracket and loop them over the front of the Slide Shaft.)

4. Use the #1 Phillips Screwdriver to remove the screws which hold the far left Upper Pinch Roller Support on the Y-Bracket. (The screws are located on the back of the Y-Bracket. See Figure 5-25.)

MAKE SURE YOU ARE LOOSENING THE CORRECT

SCREWS AND NOT THE ONES WHICH HOLD ON THE

STABILIZER BRACKET!

Assembly\Disassembly 5-44

CadJet T-200 Service Manual

5. Using your fingers, pull the Upper Pinch Roller Support forward.

Thie will seperate it from the Pinch Roller Spacer. Move the

Pinch Roller Spacer to the side.

6. Push the Upper Pinch Roller Support towards the back of the unit and turn it 90 degrees and carefully lift it away from the Y-Arm assembly. Guide the lower tab of the Upper Pinch Roller Support up past the front of the Stabilizer Bracket. Make sure the Upper

Pinch Roller Support does not catch on the front edge of the

Trailing Cable and that it does not damage the Slide Shaft or the encoder strip.

PINCH ROLLER SPACER

PINCH ROLLER SUPPORT

Figure 5-25. Removing the Upper Pinch Roller Support.

7. Working from the far left Upper Pinch Roller Support to the far right Upper Pinch Roller Support, follow Steps 4 through 7 for each of the remaining Upper Pinch Roller Supports. As you do so, be sure to keep the Carriage Belt looped over the front of the Slide

Shaft so it is not damaged. ALSO, MAKE SURE YOU ARE

LOOSENING THE CORRECT SCREWS AND NOT THE

ONES WHICH HOLD ON THE STABILIZER BRACKET!

Assembly\Disassembly 5-45

CadJet T-200 Service Manual

Installing the Upper Roller Supports

Make sure that the Carriage Belt is kept looped over the front of the

Slide Shaft while installing the new Upper Pinch Roller Supports, as follows:

1. Place the roller end of an Upper Pinch Roller Support behind the

Slide Shaft (between the back of the Slide Shaft and the front of the

Stabilizer Bracket) and push it forward as far as possible through the Upper Pinch Roller Support opening in the front of the Y-

Bracket. See Figure 5-25.

2. Insert and place the Pinch Roller Spacer into position. Ensure that the tab on the back of the spacer is inserted into the hole in the Y-

Bracket.

3. Move the Upper Pinch Roller Support into place. Make sure the point on top back of the Upper Pinch Roller Support is in its hole in the Pinch Roller Spacer. See Figure 5-25.

4. Keep pressure on the front of the Upper Pinch Roller Support while putting in the screws. Make sure the Upper Pinch Roller Support is centered in its opening. Tighten the screws until snug (no more than 3.0 In.-Lbs. + 0.5 if using a torque screwdriver). MAKE

SURE YOU ARE TIGHTENING THE CORRECT SCREWS

AND NOT THE ONES WHICH HOLD ON THE STABILIZER

BRACKET!

5. Repeat Steps 1 through 4 for the rest of the Upper Pinch Roller

Supports.

6. Put the Carriage Belt back into place in the Y-Bracket by installing the Frame Tensioner Assembly.

Assembly\Disassembly 5-46

CadJet T-200 Service Manual

NOTE

Make sure that the Carriage Belt is not twisted. One way to check this is by standing at the left end of the plotter and looking down the length of the inside of the Y-Bracket.

You can also check for twisting by moving the Carriage

Assembly as far as possible to the left end of the Slide

Shaft.

Once you are certain there is no twisting of the Carriage

Belt, slide the Carriage back and forth a few times to make sure that it slides smoothly.

7. Reattach the Trailing Cable Cover to the Y-Bracket.

8. Reattach the Left Cover.

9. Because you have replaced the Upper Pinch Roller Supports, it is necessary to perform the following portions of Chapter 3: z

“Paper Skew Setup” z

“Paper Skew Adjustment”

Because the Carriage Belt was loosened during this procedure, you will need to verify the Deadband Adjustment by performing the following portions of Chapter 3: z

“Deadband Calibration”

10. Replace the Top Cover after you have finished Step 9.

Assembly\Disassembly 5-47

Parts List 6

This chapter lists the items and their associated numbers for the parts and assemblies of the CadJet T-200 printers that are field replaceable.

The list is in order of part name as identified in the assembly/disassembly chapter.

This list is to be used in conjunction with the assembly/disassembly procedures to aquire the necessary parts and properly install them into the printer.

The parts and assemblies may be ordered through your local authorized dealer or ENCAD, Inc.’s Technical Support and Service department.

6-1

CadJet T-200 Service Manual

FIGURE ITEM

6-1

6-1

6-1

1

2

3

PART NAME PART #

ROLLGUIDE, RIGHT, ASSY .................. 206828-5

ROLLGUIDE, LEFT, ASSY .................... 204969-6

COVER ASSY, LEFT ............................... 217512-00

6-1

6-1

6-1

4 POWER ENTRY ASSY ............................ 207508

5 POWER SUPPLY ASSY, 150W ............... 218759-00

6 CABLE,

POWER SUPPLY TO MPWA .............. 218762-00

HARDWARE KIT ..................................... 205188

ASSY, HEIGHT GAGE KIT ..................... 209996-1

LOOPBACK TEST CABLE ...................... 205462

Parts List 6-2

CadJet T-200 Service Manual

Figure 6-1. Left Side Parts Breakdown.

Parts List 6-3

CadJet T-200 Service Manual

FIGURE ITEM

6-2

6-2

6-2

1

2

3

PART NAME PART #

SPRING, COMPESSION ......................... 209052

RETRACTING STOP, ASSEMBLY ......... 204246-1

COVER ASSY, TOP ................................. 217860-00

6-2

6-2

6-2

6-2

6-2

6-2

6-2

6-2

6-2

6-2

4

5

6

7

8

9

10

BELT ..................................................... 205678

SPRING, COMPRESSION (IDLER) ........ 203999

IDLER ASSEMBLY .................................. 203405-1

FRAME, TENSIONER ............................. 203870-1

TRAILING CABLE ASSY ........................ 209269-01

PINCH ROLLER ASSEMBLY ................. 204773

STABILIZER ASSY WITH

ENCODER STRIP................................. 204550

11 SLIDE SHAFT ......................................... 217506-01

12 KNIFE DAMPER ASSY ........................... 202000

13 PLATEN ASSY ........................................ 214495-02

Parts List 6-4

CadJet T-200 Service Manual

Figure 6-2. Platen and Above Parts Breakdown.

Parts List 6-5

CadJet T-200 Service Manual

FIGURE ITEM

6-3

6-3

6-3

6-3

6-3

6-3

1

2

3

4

5

PART NAME PART #

PRINT SERVER (OPTIONAL) ................ 218239-00

SIDE PLATE, RIGHT .............................. 217516-00

MAIN PCB, T-200, SERVICE .................. 2119668-025

DRAM DIMM, 32M .................................. 212456-00

COVER ASSEMBLY, WITH KEYPAD,

RIGHT ..................................................... 217510-00

6 DISPLAY, HOUSING, ASSY ................... 217543-00

Parts List 6-6

CadJet T-200 Service Manual

Figure 6-3. Right Side Parts Breakdown.

Parts List 6-7

CadJet T-200 Service Manual

FIGURE ITEM

6-4

6-4

1

PART NAME

MOTOR ASSY, SERVO,

PART #

W/FERRITE .......................................... 213674-04

2 BLOCK, RIGHT FOAM ........................... 217568-00

6-4

6-4

6-4

6-4

6-4

6-4

6-4

6-4

3 MOTOR ASSY, STEPPER,

W/FERRITE AND GEAR ...................... 210848-1

4 BRACKET ASSY, DRIVE SHAFT,

RIGHT .................................................. 204916-1

5 LOWER DRIVE E, ASSY, COMPLETE

WITH STEPPER MOTOR AND

RIGHT BRACKET ................................ 204845-1

6 BRACKET ASSY,

DRIVE SHAFT, LEFT .......................... 204916

7 SUPPORT, DRIVE SHAFT ..................... 203556-2

8 FAN ASSEMBLY, VACUUM ................... 210139

9 EXHAUST, GRILL .................................. 204976

10 PLUG, PLATEN ...................................... 203742

Parts List 6-8

CadJet T-200 Service Manual

Figure 6-4. Inner Platen Parts Breakdown.

Parts List 6-9

CadJet T-200 Service Manual

FIGURE ITEM

6-5

6-5

6-5

1

2

3

PART NAME PART #

COVER, CARRIER ELECTRONICS ........ 215111-02

CARRIAGE PWA ...................................... 212151-05

ENCODER SENSOR W/FLEX ................ 209578-101

6-5

6-5

6-5

6-5

6-5

6-5

6-5

6-5

4 STRAIN RELIEF ..................................... 215659-00

5 PEN CARRIER, 208, PARTIAL ............... 210004

6 CARRIAGE BUSHING SET (2) ............... 209568

7 PAD, BUSHING ...................................... 212426-00

8 SPRING PAD, 208 JET ........................... 207572

9 FERRITE, FLEX CABLE ......................... 210809

10 PWB, FLEX, QUAD................................. 215174-00

11 PAPER SENSOR W/FLEX ...................... 207180

PEN CARRIER ASSY,

COMPLETE ASSEMBLY ..................... 217619-00

Parts List 6-10

CadJet T-200 Service Manual

Figure 6-5. Carriage Assembly Parts Breakdown.

Parts List 6-11

CadJet T-200 Service Manual

FIGURE ITEM

6-6

6-6

1

2

PART NAME PART #

SEAL, 104/208 .......................................... 206502

WIPER ..................................................... 209276

SERVICE STATION,

COMPLETE ASSEMBLY ..................... 207611-03

Parts List 6-12

CadJet T-200 Service Manual

Figure 6-6. Service Station Assembly Parts Breakdown.

Parts List 6-13

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