Apple ImageWriter II Owner`s manual

 Apple Technical Procedures
ImageWriter II
Section 1 – Basics
o CONTENTS
1.2
1.2
1.3
1.4
1.4
1.4
1.5
1.6
1.7
1.8
1.9
1.11
1.13
1.14
1.14
1.14
1.14
ImageWriter II
Introduction
New Features
Changed Features
Setup
Power On and Off
Load Paper
Remove Paper
Load the Ribbon Cartridge
Remove the Ribbon Cartridge
Self-Test
Configuration DIP Switches
Periodic Maintenance
Maintenance Schedule
Theory of Operation
Introduction
Before You Begin
Flow of Information
rev. Aug 87
Basics / 1.1
o INTRODUCTION
The ImageWriter ® II printer is an improved version of the
ImageWriter. The following two lists discuss the new
features of the ImageWriter II and its differences from the
original ImageWriter.
New Features
ImageWriter II
Multiple Fonts
Draft—240 characters per second
Standard—180 characters per second
Near Letter Quality—25 characters per second
Auto Paper Load
Automatically loads paper when the form-feed button is
pressed.
Color Capability
Provides color-option printing with a four-color ribbon.
Sheet Feeder
Accepts a single-bin sheet feeder.
Option Card
Will accept one of the two option cards available—the
AppleTalk card or the Expanded Buffer card.
MouseText
The character set contains 32 special characters for use
on Apple II computers.
Self-Identification
The printer automatically determines its operational mode
by checking to see if there is a color ribbon, a sheet
feeder, or an option card installed.
New DIP Switches
The Option Card Enable function is switch 2-4. The
Perforation Skip is switch 1-5.
1.2 / Basics
rev. Aug 87
ImageWriter II
Changed Features
ImageWriter
ImageWriter II
Interface Port
RS-232
RS-422/423
7/8 Bit Protocol
Hardware selection.
DIP switch 1-5.
Software control only.
No DIP switch control.
Head Dot Diameter
Wire diameter is
.35 mm.
Wire diameter is .30 mm.
Placement of dots is 50%
more accurate.
Speed
Print mode is
120 characters per
second.
Print mode is
180 characters per second.
Deselect Action
The entire buffer is
printed before stopping.
printer stops.
At the most, 2 more lines
are printed before the
Tractor Feed
Disengagement
Paper must be removed
from tractors.
If you select the frictionfeed mode, tractors are
automatically disengaged.
Paper Bail
Must be pulled away
from the platen to load
paper.
Automatically loads paper.
Printing Area
Requires a 3-line top
margin.
Entire length of paper.
Vertical Paper
Feeds paper at 1.67
inches per second.
Feeds paper at 4.0 inches
per second.
ImageWriter II
rev. Aug 87
Basics / 1.3
o SETUP
Power On
and Off
1. Connect the power cord to the printer.
2. Plug the power cord into an electrical outlet.
3. Press the power switch on.
4. Check the switch panel. Make sure the power light
comes on.
5. Press the power switch off.
Load Paper
1. Make sure the power is off.
1
2
FIGURE 1
2. Pull the paper release lever forward (Figure 1, #1).
3. Lift up and remove the tractor cover (Figure 1, #2).
1.4 / Basics
rev. Aug 87
ImageWriter II
ILLUSTRATION NOT AVAILABLE
FIGURE 2
4. Lift up the clamps on both forms tractors (Figure 2, #1).
5. Make sure that the left forms tractor is positioned all
the way to the left. (To move the forms tractor, pull the
tractor release lever [Figure 2, #2] forward.) Lock the
forms tractor in place by pushing back the tractor release lever.
6. Place the paper over the forms tractor pins. If the
paper doesn't line up with the pins, move the right
forms tractor until it does. Lock the right forms tractor
in place.
7. Push down the clamps on both of the forms tractors.
8. Turn the platen knob until the paper comes through.
9. Put the back cover on.
Remove Paper
1. Make sure the power is off.
2. Check to be sure the release lever is set to tractor
feed.
3. Turn the platen knob and back the paper out.
ImageWriter II
rev. Aug 87
Basics / 1.5
Load the
Ribbon Cartridge
1. Make sure the power is off.
1
FIGURE 3
2. Lift up and remove the paper cover (Figure 3, #1).
3. Get a ribbon cartridge.
4. Place the cartridge on the ribbon plate.
1
2
FIGURE 4
5. Push down on the cartridge until it snaps into place
(see Figure 4, #2).
1.6 / Basics
rev. Aug 87
ImageWriter II
1
FIGURE 5
6. On the cartridge, turn the knob (see Figure 5, #1)
clockwise until you hear it "click" and the ribbon is taut.
7. Replace the paper cover.
Note: Be sure to replace the paper cover before
attempting to operate the printer. The printer will not
print without the paper cover in place.
Remove the
Ribbon Cartridge
1. Make sure the power is off.
2. Lift up and remove the paper cover (Figure 3, #1).
3. While pushing down on the cartridge latch arms
(Figure 4, #1), lift up the cartridge (Figure 4, #2).
ImageWriter II
rev. Aug 87
Basics / 1.7
o SELF-TEST
1. Make sure the power is off.
2. Load the paper.
3. Hold down the form-feed button while you press the
on/off button; then release both buttons.
The first part of the printout shows the ROM revision
number, the DIP switch settings, and whether an
option card is installed. Then the printer prints the
character set continuously. (If you are using a colored
ribbon, the printer alternates the color of each line.)
If you want to test the printer in all print quality modes
(draft, normal, and NLQ) continue with the following
steps. If not, skip to step 7.
4. While the printer is printing the character set, press the
line feed button to stop the printing.
5. Use the print quality button to select the desired print
quality mode (if necessary, refer to the owner's
manual for complete instructions).
6. Press the select button to resume printing the
character set. The printer continues printing in the
previous print quality mode for another two or three
lines and then changes to the newly selected print
quality mode.
7. To end the self-test, turn the power off.
Note: If you press the select button during power-up,
the ImageWriter prints a hexadecimal dump. If this
occurs, power the ImageWriter off and then back on.
The printer will power up in the proper mode.
1.8 / Basics
rev. May 91
ImageWriter II
o CONFIGURATION DIP SWITCHES
Configuration DIP switches provide variations in the ways
the printer may be operated. For additional information
on switch settings, refer to the Peripheral Interface Guide .
Materials Required
Jeweler's flatblade screwdriver
Setting the
Switches
1. Make sure the power is off.
2. Remove the paper cover.
2
1
FIGURE 6
3. Slide the carrier all the way to the right
(Figure 6, #1).
4. Locate switches SW 1 and SW 2 (Figure 6, #2).
Note: SW 2-5 and SW 2-6 are used only when
performing the firing hammer adjustment (refer to
Section 4, Adjustments).
ImageWriter II
rev. Aug 87
Basics / 1.9
5. Use a small screwdriver to move the switch handles
as desired.
6. Replace the paper cover.
7. Run the self-test.
1.10 / Basics
rev. Aug 87
ImageWriter II
o PERIODIC MAINTENANCE
Clean the printer as often as required. Lubricate it once a
year, or more often if it is being used heavily. To perform
maintenance tasks:
1. Make sure the power is off.
2. Remove the tractor cover and the paper cover.
3. Remove the paper and ribbon cartridge.
Note: For the next two steps, refer to Section 3, Take Apart, for complete instructions on removing the
carrier assembly and carrier shaft.
4. Using gauze or absorbent cotton, wipe the dirt off of
the carrier shaft.
5. Apply four drops of tellus lubrication oil to each of the
felt wipers, which are located under the carrier
assembly.
2
1
TOP
COVER
OPERATION PANEL
FIGURE 7
6. Find the detector plate. It is on the right side of the
printer, hidden just below the on/off switch (Figure 7,
#1).
7. Use a brush to remove any paper dust (Figure 7, #2).
ImageWriter II
rev. Aug 87
Basics / 1.11
1
FIGURE 8
8.
Clean the dot head (Figure 8, #1) with a lint-free cloth
and a low-residue cleaner such as isopropyl alcohol
or Freon.
9.
Replace the ribbon cartridge.
10. Perform the self-test to verify optimum printing
performance.
1.12 / Basics
rev. Aug 87
ImageWriter II
Maintenance
Schedule
ImageWriter II
The following table summarizes the manufacturer's
recommended maintenance intervals:
rev. Aug 87
Basics / 1.13
o THEORY OF OPERATION
Introduction
Troubleshooting can be approached in different ways;
Apple usually recommends both module swapping and
logical troubleshooting. But random module swapping is
impractical for printers because they have so many parts.
So, to troubleshoot the ImageWriter II, you will usually
want to use the logical troubleshooting method. A
description and diagram of the flow of information in the
ImageWriter II are given below as aids to this method.
Before You Begin
Before you begin to troubleshoot the ImageWriter II,
attempt to run the self-test before you connect the printer
to a computer. Then, if the self-test does not run correctly,
you can observe where it stops working. Knowing the
flow of information, you will be able to isolate the problem
to the faulty module.
Flow of Information
Figure 9 is a block diagram of an ImageWriter II printer.
The numbers on the diagram indicate the order in which
the self-test takes place and correspond to the following
descriptions.
1. The AC power cord is plugged into a wall socket and
into the power inlet on the right support leg.
2. The power switch on the operation panel is turned on
and the form feed switch is held down. The AC
voltage and current are passed through the filter to
reduce radio frequency interference (RFI) to FCC
standards. The 120 volts are sent to the transformer,
where they are reduced to 40 volts.
3. The 40 volts are sent to the drive PCB. Here the
voltage is broken down and sent to the various parts
that need it. The drive PCB contains the power supply
and all of the motor and print head drive circuitry. The
drive circuitry controls the firing of the hammer and
limits the current to the print head.
1.14 / Basics
rev. Aug 87
ImageWriter II
4. The necessary voltages are sent to the logic board,
and the startup sequence (stored in ROM on the logic
board) is accessed. The logic board sends startup
instructions to the drive PCB.
5. The drive PCB accesses the carrier motor. The carrier
motor centers the carrier assembly and moves it back
and forth when printing.
6. The form-feed switch is released, notifying the main
CPU board that the self-test is to be performed.
7. The main CPU board notifies the drive PCB that the
self-test is to be performed. The drive PCB notifies the
carrier motor.
8. The drive PCB takes the self-test information and
sends it to the print head PCB mounted underneath
the carrier assembly.
9. The print head PCB activates the print head and the
self-test is performed. The printer will continue to run
the self-test until powered off.
ILLUSTRATION NOT AVAILABLE
FIGURE 9
ImageWriter II
rev. Aug 87
Basics / 1.15
 Apple Technical Procedures
ImageWriter II
Section 2 – Take-Apart
o CONTENTS
2.2
2.4
2.6
2.8
2.10
2.12
2.14
2.18
2.20
2.22
2.24
2.26
2.31
2.32
2.33
2.34
2.36
2.38
2.40
2.46
2.52
2.54
2.56
2.58
Top Cover
Operation Panel
Option Card
Main CPU PCB
Print Head
Color Ribbon Assembly
Ribbon Wire and Ribbon Assembly
Flexible Ribbon Cable
Ribbon Motor Assembly
Left Support Leg
Right Support Leg
Bottom Cover
Fuses
Transformer
Drive PCB
Mechanical Assembly
Noise Filter PCB Assembly
Carrier Motor and Carrier Belt
Carrier Block Assembly and Print Head PCB
Platen and Platen Assembly
Paper-Feed Motor
Paper Guide
Paper-Out Sensor
Tractor Assembly
Note: To keep track of where cables and connectors go
during a take-apart procedure, label them using
numbered adhesive dots.
WARNING: For all take-apart procedures, the printer
should be off and the AC power cord should be
disconnected.
ImageWriter II
rev. Nov 88
Take-Apart / 2.1
o TOP COVER
Materials Required
#2 Phillips screwdriver
Remove
1. Remove the paper cover and ribbon cartridge.
2. Push the carrier assembly to the far left.
1
1
2
3
FIGURE 1
3. Loosen the two screws (Figure 1, #1) as far as they
will go.
4. Place your fingers over the edge designated by Figure
1, #2, and place your thumbs at the location
designated by Figure 1, #3. Gently pull the cover up
and toward you until it snaps free. Do not yet remove
the cover.
5. Lift the right side of the cover to gain access to the
connector.
2.2 / Take-Apart
rev. Aug 87
ImageWriter II
6. Unplug the connector that runs from the control panel
board to the main CPU PC board. Remove the
connector from the main CPU PC board.
7. Remove the top cover.
Replace
1. Push the carrier assembly to the left.
2. Lay the cover in place and lift the right side. Plug in
the connector to the main CPU PC board.
3. Tilt the cover toward you till the front edge is in place.
4. Push down the cover. You will hear a "snap" as it
goes into place.
5. Tighten the two screws (Figure 1, #1).
6. Replace the ribbon cartridge and the paper cover.
7. Perform the self-test.
ImageWriter II
rev. Nov 88
Take-Apart / 2.3
o OPERATION PANEL
Materials Required
#2 Phillips screwdriver
Small Phillips screwdriver
Remove
1. Remove the paper cover.
2. Remove the top cover.
3. Remove the four screws holding the operation panel
(Figure 2, #1).
4. Lift the operation panel from the top cover. Remove
the power button and spring (Figure 2, #2).
5. Unplug the cable from the switch assembly panel
(Figure 2, #3).
2.4 / Take-Apart
rev. Aug 87
ImageWriter II
2
3
1
FIGURE 2
ImageWriter II
rev. Nov 88
Take-Apart / 2.5
Replace
1. Place the top cover upside down.
2. Connect the power button and spring
(Figure 2,
#2) by placing the coiled half of the spring over the
outer-corner screw mount, and over the button in the
top opening on the cover.
3. Plug the cable into the operation panel
(Figure 2, #3).
4. Line up the screw mounts with the holes on the panel,
switch side down.
5. Replace the four screws (Figure 2, #1).
6. Replace the top cover.
7. Replace the paper cover.
8. Perform the self-test.
2.6 / Take-Apart
rev. Aug 87
ImageWriter II
o OPTION CARD
Materials Required
Small pair of curved needlenose pliers
Remove
1. Remove the paper cover.
2. Remove the top cover.
3. Squeeze the plastic retainers (see Figure 3) together
one at a time with the pliers, and gently lift the corners
of the option card.
4. Lift out the option card.
RETAINERS
OPTION CARD
BOTTOM VIEW
OF OPTION
CARD
MAIN CPU PCB
FIGURE 3
ImageWriter II
rev. Nov 88
Take-Apart / 2.7
Replace
1. Position the option card above the plastic retainers,
and line up the connector from the option board with
the one on the main CPU PCB (see Figure 3).
2. Push down the option card. It will snap into place.
3. Replace the top cover.
4. Replace the paper cover.
5. Perform the self-test.
2.8 / Take-Apart
rev. Aug 87
ImageWriter II
o MAIN CPU PCB
There are two main CPU PCBs available for the
ImageWriter II. For information on identification and
compatibility, refer to Section 5, Additional Procedures.
Materials Required
Magnetized, #2 Phillips screwdriver
Remove
1. Remove the paper cover.
2. Remove the top cover.
3. Remove option card, if installed.
4
1
2
5
4
3
FIGURE 4
4. Remove the three connectors. (Figure 4, #1 is a two pin; #2 is an 8-pin; and #3 is a 50-pin ribbon cable.)
a) The 50-pin connector is difficult to remove. Use a
small screwdriver and gently pry it loose from one
side; then gently rock the connector back and forth
until it comes free.
b) On new main CPU boards, the connector with the
tabs is used to make it easier to remove.
ImageWriter II
rev. Nov 88
Take-Apart / 2.9
5. Remove the five screws (Figure 4, #4).
6. Remove the sixth screw, which holds the grounding
strap (Figure 4, #5).
7. Tilt the front half of the board up. Lift the board out of
the printer.
Replace
1. Tilt the front half of the board up. Lower the board
onto the screw mounts.
2. Install the five screws (Figure 4, #4).
3. Install the sixth screw, which holds the grounding
strap (Figure 4, #5).
4. Plug in the three connectors (Figure 4, #1, #2,
and #3).
5. Install the option card, if included.
6. Replace the top cover.
7. Replace the paper cover.
8. Perform the self-test.
2.10 / Take-Apart
rev. Aug 87
ImageWriter II
o PRINT HEAD
Remove
1. Remove paper cover.
2. Remove ribbon cartridge.
3. Locate the print head (Figure 5, #1).
4. Gently push aside the white clamp (Figure 5, #2).
Grasp the print head and slowly lift it straight up and
out of the connector.
1
5
2
4
3
FIGURE 5
ImageWriter II
rev. Nov 88
Take-Apart / 2.11
Replace
1. Line up the metal connector "fingers" of the print head
with the connector (Figure 5, #3).
2. Align the front oblong portion so that it goes between
the clear plastic card holder covering the platen
(Figure 5, #4) and the print-head clamp (Figure 5, #2).
The print-head clamp goes over the indentations on
the print head (Figure 5, #5).
3. Gently push the print head down until it is firmly
seated.
4. Replace the ribbon cartridge.
5. Replace the paper cover.
6. Perform the self-test.
2.12 / Take-Apart
rev. Aug 87
ImageWriter II
o COLOR RIBBON ASSEMBLY
Materials Required
Small needlenose pliers
Remove
1. Remove the paper cover.
2. Remove the top cover.
1
4
2
5
SPRING IS
LOCATED UNDER
RIBBON CAM
3
FIGURE 6
3. Remove the lock nut (Figure 6, #1).
4. Remove the retaining clip (Figure 6, #2) with a pair of
small needlenose pliers, and take off the two washers.
5. Lift off the ribbon cam (Figure 6, #3), turning it until it is
free from the ribbon plate.
6. Remove the adjustment nut (Figure 6, #4).
7. Remove the spring (Figure 6, #5).
Replace
ImageWriter II
1. Replace the spring (Figure 6, #5).
rev. Nov 88
Take-Apart / 2.13
2. Replace the adjustment nut (Figure 6, #4).
3. Slide on the ribbon cam (Figure 6, #3) so that the
ridge on the cam is between the two tabs on the
ribbon plate. Improper positioning of the cam can
cause poor-quality printing or no printout.
WARNING: Verify that the two tabs are riding on the
ridge. Improper positioning of the cam can cause poor
quality or no printout.
4. Replace the two washers and the retaining clip
(Figure 6, #2).
5. Replace the lock nut (Figure 6, #1).
6. Perform the color printing adjustment. Refer to
Section 4, Adjustments.
2.14 / Take-Apart
rev. Aug 87
ImageWriter II
o RIBBON WIRE AND RIBBON ASSEMBLY
Materials Required
#3 jeweler's flathead screwdrivers
Remove
1. Remove paper cover.
2. Remove top cover.
3. Remove ribbon cartridge.
RIGHT END IS
MIRROR IMAGE
OF LEFT SIDE
5
SIDE
3
2
1
LEFT END,
SIDE VIEW
LEFT END,
FRONT VIEW
LEFT END,
FRONT VIEW
FIGURE 7
4. Locate the holes on the sides of the carrier assembly
(Figure 7, #1).
5. Gently insert a jeweler's flathead screwdriver into the
hole (Figure 7, #1). The black catch will come out
(Figure 7, #2). Gently pry the catch upward at a slight
angle with another jeweler's flathead screwdriver.
IMPORTANT: Do not use force when removing the black
plastic catches or you will break them.
ImageWriter II
rev. Nov 88
Take-Apart / 2.15
6. Move the small catch to the top (Figure 7, #3). Gently
pull the plastic piece straight out.
7. Repeat for the right side. The catches are not
interchangeable.
8. Remove the color ribbon selector wires from the
plastic clamp (Figure 8, #1) by gently prying the clamp
away from the carrier assembly.
9. Using a jeweler's flathead screwdriver, push the tabs
toward the center of the ribbon plate
(Figure 8, #2).
10. Slowly lift the entire plate up. If the ribbon wire (Figure
7, #5) comes with it, repeat step 9. The gears are
located under the plate.
Not Available
FIGURE 8
11. Lay the ribbon plate upside down to remove the color
ribbon detect switch (Figure 8, #3). Do not remove the
switch unless replacing the ribbon plate.
12. Insert a jeweler's flathead screwdriver under the tab
on each side of the detect switch (Figure 8, #4).
13. Gently push the switch down with a third jeweler's
flathead screwdriver.
14. Remove the wires from the retainers on the front of the
ribbon plate.
2.16 / Take-Apart
rev. Aug 87
ImageWriter II
15. Put the ribbon plate aside.
16. Disconnect and remove the ribbon wire (Figure 9, #1).
1
FIGURE 9
Replace
1. Rewrap the ribbon wire as shown in Figure 9. Be sure
the wire crosses at the front of the gear. Verify that the
spring under the spindle gear is in position before you
continue.
SIDE VIEW
3
4
1
5
2
FIGURE 10
2. Gently position and push the ribbon-detect switch into
the top of the ribbon plate (Figure 10, #3).
3. Reinstall the wires under the retainers and the bracket
(Figure 10, #1).
ImageWriter II
rev. Nov 88
Take-Apart / 2.17
4. Position the ribbon plate so that the front two tabs on
the side have the ridge of the color ribbon assembly
between them. Line up the tabs on the gear plate with
the top of the ribbon plate (Figure 10, #2), and push
the ribbon plate down. It will click into position.
WARNING: Verify that the two tabs are riding on the
ridge of the color ribbon assembly. If they are not, you
may get poor print quality or no printout at all.
5. Replace the two small plastic pieces with the catches
on them. Slide the piece for the left side (Figure 10,
#4) over the left side of the ribbon plate and carrier
assembly. Rotate the piece until the black catch pops
into the hole on the carrier assembly (Figure 10, #5).
Repeat this step for the other piece on the right side.
6. Replace the ribbon cartridge.
7. Replace the top cover.
8. Replace the paper cover.
9. Perform the self-test.
2.18 / Take-Apart
rev. Aug 87
ImageWriter II
o FLEXIBLE RIBBON CABLE
Materials Required
1/8-inch flathead screwdriver
Remove
1. Remove the ribbon wire and ribbon assembly. There
are two kinds of ribbon retainers:
a) One is held in position by a screw
(Figure 12, #1).
b) The other is held by a metal tab that is part of the
frame (Figure 12, #3).
The following procedures refer to screw-fastened
retainers. If you are working with the tab-fastened
kind, ignore references to the screw. (The tab fastened retainer can simply be pulled free and
removed.)
2. Insert the flathead screwdriver into the notch on the
flexible cable connector (Figure 11, #1). Gently turn
the screwdriver, and the connector will pop out about
1/4 inch.
CAUTION: Do not force the flexible cable to come loose
or you will damage the cable.
3. Remove the flexible cable from the connector.
4. Push the carriage assembly to the far left. Remove the
screw that holds the ribbon retainer in place (Figure
12, #1).
5. Insert the flathead screwdriver in the notch on the
connector on the drive PCB (Figure 12, #2). Gently
turn the screwdriver, and the connector will pop out
about 1/4 inch.
6. Remove the flexible cable from the connector and set
it aside.
2. 18 / Take-Apart
rev. Aug 87
ImageWriter II
CARRIAGE ASSEMBLY
WITH RIBBON WIRE AND ASSEMBLY REMOVED
DRIVE BELT
`
1
FIGURE 11
2
1
1
FIGURE 12
Replace
1. Insert the flexible cable in the connector on the drive
PCB (Figure 12, #2). Push the connector in.
2. Replace the ribbon retainer and the screw that holds
down the retainer for the flexible cable
(Figure 12, #1).
3. Push the carriage assembly to the middle. Insert the
other end of the flexible cable in the connector (Figure
11, #1). Push the connector in.
4. Replace the ribbon wire and the ribbon assembly.
5. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.19
o RIBBON MOTOR ASSEMBLY
Materials Required
Jeweler's flathead screwdriver
#2 Phillips screwdriver, magnetized
Remove
1. Remove the ribbon wire and the ribbon assembly.
1
2
MOTOR
RIBBON DETECT
SWITCH
FIGURE 13
FIGURE 13
2. Remove the two screws that hold the motor in place
(Figure 13, #1).
2. 20 / Take-Apart
rev. Aug 87
ImageWriter II
3. Position the jeweler's flathead screwdriver behind the
small black plastic extension as shown in Figure 13,
#2. Gently pry the motor out. Note the position of the
connector and the wires on the ribbon motor
assembly.
Replace
1. Slide the ribbon motor into position (Figure 13).
2. Replace the two screws that hold the motor in place
(Figure 13, #1).
3. Replace the ribbon wire and the ribbon assembly.
4. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.21
o LEFT SUPPORT LEG
Materials Required
#2 Phillips screwdriver, magnetized
Remove
1. Remove the paper cover.
2. Turn the machine upside down.
LEFT LEG
UNDERSIDE
OF LEFT LEG
1
FIGURE 14
3. Remove the Phillips screw at the base of the left leg
(Figure 14, #1).
4. Turn the machine right side up.
5. The interface cable connector slides in and out of two
notches on the inside of the leg. Push down on the
leg and slide it off the plastic frame. The interface
connector will slide off as the leg is removed.
2. 22 / Take-Apart
rev. Aug 87
ImageWriter II
Replace
1. With the machine right side up, slide the interface
connector into the notches on the inside of the leg.
2. Push the leg into position.
3. Pull upward on the leg to lock it in place.
4. Turn the printer upside down and replace the Phillips
screw (Figure 14, #1).
5. Replace the paper cover.
6. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.23
o RIGHT SUPPORT LEG
Materials Required
#2 Phillips screwdriver, magnetized
Remove
1. Remove the paper cover.
2. Turn the machine upside down.
3. Remove the Phillips screw at the base of the right leg
(Figure 15, #1).
4. Turn the machine right side up. Grasp the platen knob
and gently pull it off (Figure 15, #2).
5. Slide the paper release lever off (Figure 15, #3).
6. The AC power inlet connector is located inside and is
not physically mounted to this leg. Push down and
slide the right leg off the plastic frame.
PAPER
RELEASE
PLATEN
KNOB
3
2
RIGHT LEG
UNDERSIDE
OF RIGHT LEG
1
FIGURE 15
2. 24 / Take-Apart
rev. Aug 87
ImageWriter II
Replace
1. With the printer right side up, slide the AC connector
into the notches. The wires on the AC connector are
short: be careful not to break them off.
2. Push the leg into position.
3. Pull upward on the leg to lock it in place.
4. Slide the paper release lever on (Figure 15, #3).
5. Line up the platen knob and push it into position
(Figure 15, #2).
6. Turn the machine upside down and replace the
Phillips screw (Figure 15, #1).
7. Replace the paper cover.
8. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.25
o BOTTOM COVER
Materials Required
#2 Phillips screwdriver, magnetized
Small Phillips screwdriver, magnetized
Flathead screwdriver
Remove
1. Remove the paper cover.
2. Remove the tractor cover.
3. Remove the left and right legs.
1
AC
CONNECTOR
2
3
FILTER
PCB
FIGURE 16
4. Remove the two screws located under the tractor
cover (Figure 16, #1).
5. Remove the grounding connector from the spade on
the drive PCB (Figure 16, #2).
6. Remove the two grounding screws, which hold three
grounding wires, located in the right support leg
(Figure 16, #3).
7. Push the carriage assembly to the far left. Remove the
flexible cable from the drive PCB.
8. Turn the printer upside down and loosen the four
screws as far as they will go (Figure 17, #1).
2. 26 / Take-Apart
rev. Aug 87
ImageWriter II
IMPORTANT: The power supply assembly has four
cable connectors and one plug connector, all of which
must be disconnected before you remove the bottom
cover.
1
..
FIGURE 17
9. Using a small flathead screwdriver, gently pry up the
left side of the bottom cover. Disconnect the three
connectors (Figure 18, #1) in one of two ways:
a) Some cables are long enough to allow you to lift
the left side of the access cover about 3 inches—
until you can reach the three connectors located
on that side of the board and disconnect them.
b) Using a pair of curved needlenose pliers, access
the connectors through the left support leg and
gently disconnect them.
10. Lift the front half of the bottom cover, and disconnect
the 50-pin ribbon cable. (Figure 18, #2).
The 50-pin connector is difficult to remove. Use a
small screwdriver to gently pry it loose from one side;
then gently rock the connector back and forth until it
comes free.
ImageWriter II
rev. Aug 87
Take-Apart / 2.27
TRANSFORMER
1
DRIVE PCB
2
FIGURE 18
2. 28 / Take-Apart
rev. Aug 87
ImageWriter II
11. Carefully lift the bottom cover from the back and flip
the bottom cover toward the front.
12. Disconnect the plug cable running from the right leg to
the transformer on the bottom cover (Figure 19, #2).
13. Remove the bottom cover.
TRANSFORMER
DRIVE PCB
3
2
1
4
FIGURE 19
Replace
1. Place the bottom cover face up on the bottom of the
printer.
2. Connect the plug cable running from the right leg to
the bottom cover (Figure 19, #2).
3. Lift the rear portion of the bottom cover, and connect
the 50-pin ribbon cable (Figure 19, #4).
4. Route the grounding strap from the transformer into
the right support leg.
5. Tilt the bottom cover toward you and lower it into
place. Check all the wires and cables: be sure they
are not crimped and are correctly routed.
ImageWriter II
rev. Aug 87
Take-Apart / 2.29
6. Connect the three cables on the left side
(Figure 19, #3). There are two ways to connect the
three cables:
a) Some cables are long enough to allow you to lift
the left side of the access cover about 3 inches—
until you can reach the three connectors located
on that side of the board and connect them.
b) Using a pair of curved needlenose pliers, access
the three connectors through the left support leg,
and then gently connect them with the pliers.
1
FIGURE 20
7. Replace the four screws that hold the bottom cover in
place (Figure 20, #1).
8. Turn the printer right side up.
9. Connect the grounding connector to the spade on the
corner of the drive PCB (Figure 19, #1).
2. 30 / Take-Apart
rev. Aug 87
ImageWriter II
10. Replace the two screws (Figure 21, #1).
11. Reconnect the three grounding straps and two screws
into the right support leg (Figure 21, #2).
12. Push the carrier assembly to the far left and connect
the flexible cable to the drive PCB.
13. Replace the left and right support legs.
14. Replace the tractor cover.
15. Replace the paper cover and run the self-test.
1
AC CONNECTOR
2
FILTER
PCB
FIGURE 21
ImageWriter II
rev. Aug 87
Take-Apart / 2.31
o FUSES
Materials Required
Fuse puller
Digital multimeter
There are two fuses on the drive board on the bottom
cover. Check the fuses to verify that they are good. If a
fuse is bad, replace it.
Remove
1. Remove the bottom cover.
2. Examine the fuses for burn marks. If possible, check
them with a multimeter (refer to Section 3,
Troubleshooting).
Fuse 1 (Figure 22, #1) is a 1-amp fuse.
Fuse 2 (Figure 22, #2) is a 5-amp fuse.
1
TRANSFORMER
2
DRIVE PCB
FIGURE 22
Replace
1. Replace any defective fuses.
2. Replace the bottom cover.
2. 32 / Take-Apart
rev. Aug 87
ImageWriter II
o TRANSFORMER
Materials Required
#2 Phillips screwdriver
Remove
1. Remove the bottom cover.
2. Disconnect the cable to the drive PCB (Figure 23, #1).
3. Remove the three screws (Figure 23, #2).
4. Lift out the transformer.
TRANSFORMER
DRIVE PCB
1
2
FIGURE 23
Replace
1. Place the transformer on the bottom cover so that the
screw holes line up.
2. Replace the three screws (Figure 23, #2).
3. Connect the cable to the drive PCB (Figure 23, #1).
4. Replace the bottom cover.
5. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.33
o DRIVE PCB
Material Required
#2 Phillips screwdriver
Remove
1. Remove the bottom cover.
2. Disconnect the cable from the transformer
(Figure 24, #1).
3. Remove the three screws from the drive PCB (Figure
24, #2).
4. Lift out the drive PCB.
TRANSFORMER
2
DRIVE PCB
1
FIGURE 24
Replace
1. Place the drive PCB on the bottom cover so the screw
holes line up.
2. Replace the three screws (Figure 24, #2).
3. Connect the cable from the transformer
(Figure 24, #1).
4. Replace the bottom cover.
5. Perform the self-test.
2. 34 / Take-Apart
rev. Aug 87
ImageWriter II
o MECHANICAL ASSEMBLY
Materials Required
#2 Phillips screwdriver, magnetized
Note: The mechanical assembly is not available as a
replacement part.
Remove
1. Remove the paper cover.
2. Remove the tractor cover.
3. Remove the top cover.
4. Remove the print head.
5. Remove the logic board.
6. Remove the left and right legs.
7. Remove the bottom cover.
3
2
1
FIGURE 25
8. Remove the two mounting screws (Figure 25, #1).
Note: If the mechanical assembly has a third
mounting screw (Figure 25, #3), remove it also.
ImageWriter II
rev. Mar 88
Take-Apart / 2.35
9. Lift the right side of the mechanical assembly, and
disconnect the two plug connectors (Figure 25, #2).
10. Lift the entire mechanical assembly from the plastic
case.
Replace
1. Position the 50-pin cable on the bottom of the plastic
case. Place the noise filter PCB in the right support
leg. Verify that the PCB is lying flat in the bottom of the
leg.
2. Tilt the mechanical assembly into the plastic case.
Keep the right side lifted and connect the two plug
connectors (Figure 25, #2). Make sure the assembly
sits under the three white plastic tabs on the rear of
the case. Make sure all wires and cables are routed
correctly. Check for any crimped wires or cables.
Slide the mechanical assembly into the plastic case.
Line up the screw holders.
IMPORTANT: On new models of the printer, the plug
connector is located in the right support leg. Be sure you
connect the top two cables from the power-on switch to
the noise PCB and the bottom two cables to the
transformer. Failure to make these connections will
cause all lights on the operation panel to remain lit.
3. Replace the two screws (Figure 25, #1).
4. Replace the bottom cover.
5. Replace the left and right legs.
6. Replace the logic board.
7. Replace the top cover.
8. Replace the print head.
9. Replace the tractor cover.
10. Replace the paper cover.
2.36 / Take-Apart
rev. Aug 87
ImageWriter II
o NOISE FILTER PCB ASSEMBLY
Remove
1. Remove the mechanical assembly.
2. Locate the noise filter PCB in the right support leg
(Figure 26, #1).
1
2
FRONT OF PRINTER CASE
FIGURE 26
3. Lift the tab (Figure 26, #2) and lift out the noise filter
PCB assembly (Figure 27).
4. Check the fuse on the noise filter PCB (Figure 27, #1)
with a multimeter. Refer to Section 3,
Troubleshooting, for more information.
1
FIGURE 27
ImageWriter II
rev. Feb 89
Take-Apart / 2.37
Replace
1. Lift the tab (Figure 26, #2) and slide the noise filter
PCB assembly into place.
2. Replace the mechanical assembly.
3. Perform the self-test.
2.38 / Take-Apart
rev. Aug 87
ImageWriter II
o CARRIER MOTOR AND CARRIER BELT
Materials Required
#2 Phillips screwdriver
Remove
1. Remove the mechanical assembly .
2. Remove the ribbon plate . (It is not necessary to
remove the entire ribbon wire assembly.)
3. Remove the screw that holds the black plastic carrier
belt guide (Figure 28, #1). Some guides are glued to
the belt: Do not pry the guide off the assembly unless
you are replacing the carrier belt.
4. Loosen the carrier belt adjustment screw
(Figure 28, #2).
5. Gently push in on the metal plate under the screw,
and remove the drive belt from the right carrier motor
pulley. Lift the carrier belt from the machine (Figure
28, #3).
6. Disconnect the three screws holding the carrier motor
in place (Figure 28, #4). The motor will drop out.
1
2
4
3
FIGURE 28
2.38 / Take-Apart
rev. Aug 87
ImageWriter II
Replace
1. Position the carrier motor with the connector and wires
toward the rear of the machine, and replace the three
screws (Figure 28, #4).
2. Replace the carrier belt on the left pulley and align it
(Figure 28, #3). Push in on the metal plate of the
carrier adjustment (Figure 28, #2), and replace the
carrier belt on the right pulley.
3. Place the plastic carrier belt guide in position and
replace the screw (Figure 28, #1).
4. Tighten the carrier belt adjustment screw.
5. Replace the ribbon assembly .
6. Replace the mechanical assembly .
7. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.39
o CARRIER BLOCK ASSEMBLY AND PRINT HEAD PCB
Materials Required
#2 Phillips screwdriver
Jeweler's flathead screwdriver
Remove
1. Remove the mechanical assembly .
2. Remove the ribbon wire and ribbon assembly .
3. Remove the color ribbon assembly .
4. Remove the ribbon motor assembly .
5. Remove the carrier drive belt .
1
4
LEFT SIDE
FRONT VIEW
5
CARRIER
SHAFT
2
6
RIGHT SIDE
METAL FRAME
FRONT VIEW
SIDE VIEW
IMPRESSION LEVER
CARRIER
SHAFT
METAL TAB
PLASTIC
TAB
METAL FRAME
3
FIGURE 29
2.40 / Take-Apart
rev. Aug 87
ImageWriter II
6. Remove the two screws holding the clear plastic
paper guide (Figure 29, #1).
7. Look at Figure 29, #2, for the connection of the right
side of the carrier shaft to the frame. Pry forward the
metal tab that is part of the frame.
8. Gently insert a jeweler's flathead screwdriver into the
hole in the frame containing the tab
(Figure 29, #3). Gently push the tab backward and lift
the right side of the carrier shaft free.
9. Look at Figure 29, #4, to see where to connect the left
side of the carrier shaft to the frame.
10. Gently push back the metal tab (Figure 29, #5), and
slide the carrier shaft to the right until it is free.
11. Pull the back of the carrier assembly (Figure 29, #6)
toward the front of the machine to release the tabs
holding the assembly in position, and lift up the carrier
assembly and the carrier shaft.
12. Remove the carrier cam (shaped like a washer) from
the left side of the carrier shaft.
13. Turn the carrier assembly and the carrier shaft over.
Slide the carrier shaft free of the carrier assembly.
There are two felt wipers (for lubrication purposes)
where the carrier shaft slides through the carrier
assembly. Remove them (Figure 30, #1).
CARRIER ASSEMBLY
CARRIER SHAFT
1
FIGURE 30
ImageWriter II
rev. Aug 87
Take-Apart / 2.41
14. Locate the black plastic clamp on the carrier assembly
holding the small connector in place (Figure 31, #1).
Pry the two tabs (Figure 31, #2) loose and gently pull
the clamp up and off.
15. Remove the two screws holding the print head PCB in
place (Figure 31, #3).
16. Gently lift the side of the board (Figure 31, #4). Slide it
out from the tabs and remove it from the carrier
assembly.
17. Slide out the small three-pin connector
(Figure 31, #5) mounted on the carrier assembly.
2
1
3
5
4
SIDE VIEW
OF BRACKET
FIGURE 31
2.42 / Take-Apart
rev. Aug 87
ImageWriter II
Replace
1. Slide the small three-pin connector, which is wired to
the print head PCB, onto the mount provided on the
carrier assembly (Figure 31, #5).
2. Position the print head PCB on the carrier assembly.
3. Replace the two screws (Figure 31, #3).
4. Position the bracket as shown in Figure 31, #1, and
snap it into place.
5. Slide the carrier shaft through one end of the carrier
assembly, replace the two felt wipers, and slide the
carrier shaft through the other side of the carrier
assembly (Figure 32, #1).
CARRIER ASSEMBLY
CARRIER SHAFT
1
FIGURE 32
ImageWriter II
rev. Aug 87
Take-Apart / 2.43
ILLUSTRATION NOT AVAILABLE
FIGURE 33
6. Place the carrier cam on the left side of the carrier
shaft. Be sure to position it as shown in Figure 33, #7,
with the smaller section as the top of the cam. The
wrong position will produce uneven printing.
IMPORTANT : To be sure you get even printing
intensity, be sure to position the carrier cam with the
smaller section as the top of the cam.
7. Position the carrier assembly so the tabs underneath
the assembly (Figure 33, #1) are in place.
8. Push back the tab (Figure 33, #2), and slide the left
side of the carrier shaft into place while making sure
the right side is lined up.
9. Slide the right side of the carrier shaft into position,
making sure that the tab is in the hole in the metal
frame and that the impression lever is in position
(Figure 33, #3).
2.44 / Take-Apart
rev. Aug 87
ImageWriter II
10. Push the metal tab back toward the rear of the
machine (Figure 33, #4).
11. Verify that the impression lever is pushed forward all
the way. Position the clear plastic paper guide and
replace the two screws (Figure 33, #5). (Refer to
Section 4, Adjustments, if you need more information.)
12. Replace the carrier drive belt .
13. Replace the ribbon motor assembly .
14. Replace the color ribbon assembly .
15.
Replace the ribbon wire and ribbon assembly .
16. Replace the mechanical assembl y.
17. Perform the self-test.
ImageWriter II
rev. Aug 87
Take-Apart / 2.45
o PLATEN AND PLATEN ASSEMBLY
Materials Required
Pin punch (1/16 inch)
Soldering iron, solder sucker, and solder
Remove
1. Remove the tractor cover.
2. Remove the top cover .
3. Remove the print head .
4. Remove left and right support legs .
5. Remove the paper bail assembly screws
(Figure 34, #1).
6. Remove the two screws (Figure 34, #2) that hold the
paper guide in place. Lift the paper guide out of the
machine.
1
6
2
4
3
5
B
A
7
FIGURE 34
2.46 / Take-Apart
rev. Aug 87
ImageWriter II
7. From the right side of the printer, remove the screw
(Figure 34, #3) that holds the metal plate in place. Set
the metal plate and screw aside.
8. From the left side, remove the screw (Figure 34, #4)
that holds the grounding strap in place.
9. From the left side, remove the two screws that hold the
metal plate in place (Figure 34, #5). Set the metal
plate and two screws aside.
10. Locate the metal plate attached to the platen (Figure
34, #6). The plate has a small black grounding wire
either soldered to it or attached with a screw: either
unsolder the wire or remove the screw.
11. Lift the platen left side first from the machine, and slide
the shaft free from the right side.
12. On the right side of the machine are two plastic
pieces, the platen bushing and the free lever. The
platen shaft slides into the bushing (Figure 34, #7).
Use a flathead screwdriver to gently snap the outer
piece free. Remove both pieces.
13. Locate the two pins on the platen (Figure 35, #1).
Remove both pins using a pin punch; then remove all
the black plastic pieces from the platen.
1
FIGURE 35
ImageWriter II
rev. Aug 87
Take-Apart / 2.47
Note: There is no paper-empty frame (Figure 36, #1)
when an optical paper-out sensor is installed.
3
2
1
4
LEFT SIDE
FIGURE 36
Replace
1. Assemble the left side of the platen (Figure 36). Slide
the paper-empty frame (Figure 36, #1) into place and
insert the pin (Figure 36, #2). Slide the platen gear
and then the platen bushing into place (Figure 36, #3
and #4).
Note: There is no paper-empty frame (Figure 36, #1)
when an optical paper-out sensor is installed.
2. Assemble the right side of the platen (Figure 37).
Slide the drive gear (Figure 37, #1) into position and
insert the pin (Figure 37, #2). Slide the platen spring
into position (Figure 37, #3).
2
1
3
RIGHT SIDE
FIGURE 37
2.48 / Take-Apart
rev. Aug 87
ImageWriter II
2
1
RIGHT SIDE
METAL FRAME
FIGURE 38
3. Position the platen bushing (Figure 38, #1) into the
frame on the right side of the printer. Slide the free
lever (Figure 38, #2) onto the bushing.
4. Slide the right side of the platen shaft into the bushing
and lever (Figure 39, #1). Line up the tab on the
paper-empty frame with the notch in the plastic frame
(Figure 39, #2). Drop the left side into place (Figure
39, #3).
2
3
1
METAL FRAME
METAL FRAME
FIGURE 39
ImageWriter II
rev. Aug 87
Take-Apart / 2.49
6
4
5
3
1
A
2
B
FIGURE 40
5. Position the metal plate on the right side of the platen
and replace the screw that holds it
(Figure 40, #1).
6. Position the metal plate on the left side of the platen
and replace the two screws that hold it (Figure 40, #2).
Note: The plate has an elongated hole in it. Be sure
to press the plate down as you tighten it; otherwise the
printer will have form feed problems on the left side.
7. Position the grounding strap and replace the screw
that holds it (Figure 40, #3).
2.50 / Take-Apart
rev. Aug 87
ImageWriter II
8. Locate the small black grounding wire. Solder the
wire to the metal plate on the paper empty frame, or
replace the screw (Figure 40, #4).
9. Position the paper guide and replace the two screws
that hold it (Figure 40, #5).
10. Replace the paper bail assembly (Figure 40, #6).
11. Replace the left and right support legs .
12. Replace the print head .
13. Replace the top cover .
14. Replace the tractor cover.
15. Perform the self-test .
ImageWriter II
rev. Aug 87
Take-Apart / 2.51
o PAPER-FEED MOTOR
Materials Required
#2 Phillips screwdriver, magnetized
Note: It is not necessary to remove the logic board
from the mechanical assembly for this procedure.
Remove
1. Remove the mechanical assembly .
1
2
LEFT
FIGURE 41
2.52 / Take-Apart
rev. Aug 87
ImageWriter II
2. Locate the paper-feed motor (Figure 41, #1).
3. Remove the two screws that hold the motor in place
(Figure 41, #2).
4. Gently pull the motor off the mechanical assembly.
Replace
1. Slide the paper-feed motor onto the mechanical
assembly.
2. Replace the two screws that hold the motor in place
(Figure 41, #2).
3. Replace the mechanical assembly .
ImageWriter II
rev. Aug 87
Take-Apart / 2.53
o PAPER GUIDE
Materials Required
#2 Phillips screwdriver, magnetized
Small flat-blade screwdriver
Remove
1. Remove the mechanical assembly .
2. Remove the platen and platen assembly .
ILLUSTRATION NOT AVAILABLE
FIGURE 42
3. Remove the three screws that hold the paper guide in
place (Figure 42, #1).
4. Push the carrier to the left; then gently unhook each of
the three tabs (Figure 42, #2) with a small flat-blade
screwdriver.
5. Push the carrier to the right; then gently unhook each
of the remaining two tabs (Figure 42, #3) with a small
flat-blade screwdriver.
6. Lift off the paper guide.
7. Lift the two pinch-rollers and pinch-roller spring plates
off the paper guide and set them aside.
2.54 / Take-Apart
rev. Aug 87
ImageWriter II
Replace
1. Position the two pinch-roller spring plates
(Figure 43, #1) on the paper guide.
ILLUSTRATION NOT AVAILABLE
FIGURE 43
2. Position the paper guide so that the tabs line up with
the assembly. Gently press the paper guide into
position.
3. Place the pinch-rollers (Figure 43, #2) on the paper
guide and replace the three screws.
4. Replace the platen and the platen assembly .
5. Replace the mechanical assembly .
ImageWriter II
rev. Aug 87
Take-Apart / 2.55
o PAPER-OUT SENSOR
Materials Required
#2 Phillips screwdriver
Small flat-blade screwdriver
Remove
There are two paper sensors: one is a mechanical
paper-out sensor (Figure 44, #1), and one is an optical
paper-out sensor (Figure 45, #1). For information on the
compatibility of these sensors with the main CPU PCBs,
refer to Section 4, Additional Procedures.
1. Remove the paper guide. Pay special attention to
how the sensor wires are routed to the front of the
machine.
2. Turn the paper guide upside down.
a) For the mechanical sensor:
Insert a small flat-blade screwdriver into the notch
that holds the sensor in place
(Figure 44, #2).
ILLUSTRATION NOT AVAILABLE
FIGURE 44
2.56 / Take-Apart
rev. Aug 87
ImageWriter II
b) For the optical sensor:
Gently push the sensor from the top of the paper
guide until it pops out.
ILLUSTRATION NOT AVAILABLE
FIGURE 45
3. Remove the paper sensor.
Replace
1. Put the paper-out sensor in place.
a) For the mechanical sensor: route the wires as
shown in Figure 44, #3.
b) For the optical sensor: route the black-and-yellow
wire (shown in Figure 45, #3) and route the single
wire (shown in Figure 45, #2).
2. Replace the paper guide .
ImageWriter II
rev. Aug 87
Take-Apart / 2.57
o TRACTOR ASSEMBLY
Materials Required
#2 Phillips screwdriver, magnetized
Small Phillips screwdriver, magnetized
Small flat-blade screwdriver
Remove
Two versions of the tractor assembly exist: one version is
fastened in place with screws, the other version has a
snap-to-fit assembly (no screws). To remove the tractor
assembly, follow the directions below for the correct
assembly.
Assemblies with
Screws
1. Remove the paper cover and the tractor cover.
2. Remove the left and right support legs .
3. Remove the top cover .
4. Remove the bottom cover .
Note: The bottom cover procedure mentioned here
takes apart the rear metal portion of the bottom cover.
Sections of the bottom cover are shown on the
Illustrated Parts List. The plastic portion of the bottom
cover will be removed in step 8.
5. If you have a late-model printer, disconnect the cable
that goes from inside the right leg to the power switch
assembly (attached to the frame).
Note: If you have an early model, the cable runs from
inside the right leg along the right side of the frame
and is joined by the extension from another cable that
connects to the transformer. (Both of these cables on
earlier models disconnect at the right front of the
printer, and will be disconnected in step 8.)
6. Turn the printer upright. Carefully move the carrier
assembly slightly left of center to give access to the
two large screws (Figure 46, #1) that hold the frame to
the remainder of the plastic bottom cover. Remove the
screws.
2.58 / Take-Apart
rev. Aug 91
ImageWriter II
2
1
FIGURE 46
7. If there is a screw (Figure 46, #2) between the stepper
motor and carrier motor housing, remove it.
Note: On earlier ImageWriter II models, this screw
does not exist.
ImageWriter II
rev. Aug 91
Take-Apart / 2.59
1
FIGURE 47
8. On later models, lift up the front of the frame and pull it
toward you until it is completely out of the plastic
portion of the bottom cover. If the frame does not clear
the top rear of the bottom cover, push slightly at the
top of the back edge above each of the three molded
plastic frame holders (Figure 47, #1) of the bottom
cover.
Note: On earlier models, before you can remove the
frame from the plastic portion of the bottom cover, you
must disconnect the two cables mentioned in step 5
(the cables run along the right side of the frame and
disconnect at the right front of the printer).
ILLUSTRATION NOT AVAILABLE
FIGURE 48
2.60 / Take-Apart
rev. Aug 91
ImageWriter II
9. Turn the printer so the rear is facing you and remove
the two small screws (Figure 48, #1) from the
SheetFeeder connector bracket.
10. Remove the SheetFeeder connector and the metal
bracket that holds the connector in place.
1
2
Stepper
Motor
Left Side
Right Side
3
FIGURE 49
11. Turn the printer so the stepper motor is facing you and
remove the screw (Figure 49, #1) that holds the tractor
assembly to the metal frame.
12. Turn the printer to the right side and remove the screw
(Figure 49, #2) that holds the tractor assembly to the
frame.
13. Turn the printer so the rear is facing you. Hold the
round rod and plastic end pieces (Figure 49, #3) of the
tractor assembly and carefully pull straight toward you
until the tractor assembly is free from the frame.
Assemblies
without
Screws
ImageWriter II
1. Remove the mechanical assembly .
2. Remove the paper bail assembly .
rev. Aug 91
Take-Apart / 2.61
3. Remove the cut-sheet feeder connector (Figure 50,
#1) and bracket (Figure 50, #2).
1
2
Stepper
Motor
Left Side
Right Side
FIGURE 50
4. Using a small flat-blade screwdriver, pry back the
black plastic tab inside the hole on the right-rear side
of the frame (Figure 50, #3), and gently pull back on
the tractor assembly about 1/4 of an inch.
5. Repeat step 4 to release the left side of the assembly.
6. When both sides have been released from the indents
on the metal frame, pull the tractor assembly straight
out the rear of the mechanical assembly (Figure 51).
2.62 / Take-Apart
rev. Aug 91
ImageWriter II
1
2
3
FIGURE 51
ImageWriter II
rev. Aug 91
Take-Apart / 2.63
Replace
1. Hold the plastic end pieces on each end of the tractor
assembly and slide the tractor assembly into the frame
slot until the black tabs snap into the indents on the
frame (Figure 51).
2. Place the connector bracket on top of the cut-sheet
feeder connector so that the extension of the
connector bracket (Figure 52, #2) faces the wide side
of the connector and extends up into the printer and
then down.
3. Place the cut-sheet connector onto the frame support
at the rear of the printer. Be sure the narrow edge of
the connector (Figure 52, #1) is facing away from the
printer head.
4. Replace the two screws through the bracket and cut sheet connector (Figure 52, #3).
2
1
FIGURE 52
2.64 / Take-Apart
rev. Aug 91
ImageWriter II
5. Place the frame into the plastic portion of the bottom
cover, being careful to feed the cables between the
left side of the frame and the left side of the bottom
cover. The cables attached to the bottom right side of
the frame, those that come from the SheetFeeder
connector, and the large gray ribbon cable should be
fed straight back into the opening for the metal portion
of the bottom cover (yet to be replaced).
Note: If you have an early-model printer, connect at
this time, at the right front of the printer, the cable that
runs to the inside of the right leg and the extension
cable that connects to the cable that comes from the
transformer.
ILLUSTRATION NOT AVAILABLE
FIGURE 53
6. Replace the two large screws (Figure 53, #1) that hold
the frame to the plastic portion of the bottom cover.
7. If the screw exists (it doesn't on earlier models),
replace the frame screw (Figure 53, #2) between the
stepper motor and carrier motor housing.
ImageWriter II
rev. Aug 91
Take-Apart / 2.65
 Apple Technical Procedures
ImageWriter II
Section 3 – Troubleshooting
o CONTENTS
3.2
3.2
3.2
3.4
3.6
3.10
3.10
3.12
3.14
3.16
3.18
3.20
3.22
ImageWriter II
Introduction
Before You Start
How to Use the Symptom Charts
Things to Check
Symptom Table
ImageWriter II Flow Charts
Power Light Not Lit
Power Light On, No Printing
No Paper Feed
Ribbon Color Selection Fails
Print Quality Problems
Option Card Malfunctioning
Final Test
rev. Aug 87
Troubleshooting / 3. 1
o INTRODUCTION
Before
You Start
Read the section entitled "Things to Check"
before you begin troubleshooting. You need the
information in that section to troubleshoot the
ImageWriter II effectively.
If the suggestions in "Things to Check" do not correct a
problem, run the self-test (see Section 1, Basics).
How to Use
the Symptom
Charts
First find the symptom that most nearly describes the
problem; then perform the first corrective action on the
solution list. If that corrective action does not fix the
problem, go to the next one. If you replace a module
and find that the problem remains, reinstall the
original module before you go on to the next
action.
If the symptoms displayed by the ImageWriter II are not
listed in the symptom charts, or if the system is not
displaying a clearly defined problem, use the "Flow
Chart" section.
3.2 / Troubleshooting
rev. Aug 87
ImageWriter II
How to Use
the Flow Charts
Examine the printer for the symptoms listed below, and
then turn to on of th seven troubleshooting flow charts for
instructions. If the flow chart asks you to make a
replacement or an adjustment, you can look up the
procedure in the table of contents.
Examine the printer for the symptoms listed below, and
turn to the appropriate flow chart for instructions. Step by-step instructions for recommended replacements and
adjustments can be found by consulting the table of
contents of the appropriate sections.
Note: Some of the flow charts have you use a
multimeter to check resistance and continuity on some
replaceable parts and modules. If you do not know
how to use the multimeter, you will have to exchange
the part in question to verify that the customer's part is
bad.
Indication
Flow Chart
Power Light Not Lit
1
Power Light On, No Printing
2
No Paper Feed
3
Ribbon Color Selection Fails
4
Print Quality Problems
5
Option Card Malfunctioning
6
Final Test
7
On the page facing each of the flow charts, there are
notes with additional instructions and references.
Starting at the top of a flow chart, answer the questions
and proceed down the chart. When you arrive at a
rectangular box containing a list of actions, perform the
actions in the sequence listed. On completion, return to
the preceding diamond box. If the problem remains,
reinstall the original module before you go on to
the next action.
ImageWriter II
rev. Aug 87
Troubleshooting / 3. 3
o THINGS TO CHECK
There are many problems that have simple corrections
listed on the following chart. It will save you time in the
long run if you try these remedies before you begin
troubleshooting.
Note: If an option card is installed, remove it before you
begin. Then verify that the dip switch, SW2-4, is open/off.
Symptom
Check
•
Error light blinks
1. Carrier cover securely in place.
2. Carrier cover magnet in place.
3. Left margin error occurs while printing. This error may
be a software problem: try other software.
4. Option card dip switch is open/off with no card
installed.
•
Select light off,
error light on
– No paper or improperly inserted paper.
•
No printing or
garbled printing
1. The interface cable between the printer and the
computer is loose or disconnected.
2. DIP switches (switches 2-1 through 2-4) are
improperly set.
•
Software-specific
problem
– Try a known-good piece of software.
•
Prints ok for a
while, then garbage
– Set DIP switch 2-3 to the correct serial protocol.
3.4 / Troubleshooting
rev. Mar 88
ImageWriter II
Symptom
Check
•
Overprinting
– Check that the program being used is set for the
correct line spacing and line length.
•
Light printing
1. Change ribbon cartridge.
2. Adjust the impression lever (see Section 4,
Adjustments).
•
Erratic carrier
motion, loud hum
– Remove black tube-shaped shipping protection
from the carrier shaft.
•
Printing has
squashed lines,
misregistration
problems when
using pin feed paper
1. For the best print quality, instruct the customer to
place the stack of paper behind the printer. The
paper should have a clear, unobstructed entry and
exit path.
2. Be sure that the power cord or printer cable does
not obstruct the paper path.
3. Check whether the manual paper sensor is exerting
too much pressure on the paper.
4. Check whether the paper guide is exerting too much
pressure on the paper.
5. Verify that the tractor assembly is not allowing paper
to slip.
6. Check that the printhead gap is correct (see "Shims"
in Section 5, Additional Procedures).
7. Check whether the paper bail is exerting too much
pressure on the paper.
8. Avoid printing in the top and bottom one inch of the
paper (the areas where the squashed line and
misregistration problems will be the most apparent).
9. Try using 20-pound paper.
ImageWriter II
rev. May 91
Troubleshooting / 3. 5
o SYMPTOM TABLE
Print Quality Problems
Solutions
•
Compressed first or
second line when
printing
– Replace CPU PCB.
•
Print is darker or
lighter on one side
– Refer to Section 5, Additional Procedures, for
removing and installing shims.
•
Top row of dots
missing on printout
– Perform Ribbon Adjustment (refer to Section 4,
Adjustments).
•
When printing from a
– Verify that the ImageWriter II driver software
Macintosh, characters
is the most current version. If it is not, run the
sometimes appear
run the most current Install program and
smudged, or the top of
select the ImageWriter as the print driver.
form gradually creeps
down the page in oneline increments
•
Power light on,
no printing
1. Verify that the ribbon frame assembly is riding on
the spiral ridge on the color ribbon cam (see Section
4, Adjustments).
2. Remove the dot head, and verify that the pins in the
connector on the dot head PCB are not bent.
3. Go to Troubleshooting Table 2.
•
Missing dots
1. Verify that the flexible cable is connected properly.
2. Remove the dot head, and verify that the pins in the
connector on the dot head PCB are not bent.
3. Go to Troubleshooting Table 5.
3.6 / Troubleshooting
rev. May 91
ImageWriter II
Carriage Movement
Problems
Solutions
•
Carriage doesn't
move; LEDs are not
lit
1. Replace the drive PCB.
2. Replace the transformer.
3. Replace the filter assembly.
•
Carriage doesn't
move; LEDs are lit
1. Replace the CPU PCB.
2. Replace the drive PCB.
•
Carriage assembly
moves to the left and
does not return
to center
1. Check the switch on the print head PCB. If the
switch is frozen, replace the print head PCB.
2. Replace the CPU PCB.
3. Replace the print head PCB.
4. Replace the flexible ribbon cable.
5. Replace the drive PCB.
•
Carriage moves to
the left and
hums very loudly
1. Ensure that the flexible ribbon cable is properly
connected to the drive PCB and to its connector
under the carriage assembly.
2. Replace the flexible ribbon cable.
3. Replace the print head PCB.
•
Self-test after
take-apart produces
no carrier movement
(panel lights on)
1. Remove the bottom cover to ensure that the wires
to the carrier motor are not pinched. If wires to the
carrier motor are worn, replace the carrier motor.
2. Replace the fuse on the drive PCB.
3. Replace the drive PCB.
•
Carriage assembly
grinds or is
hard to move
1. Remove the bottom cover to ensure that the wires
to the carrier motor are not pinched. If wires to the
carrier motor are worn, replace them.
2. Replace the fuse on the drive PCB.
3. Replace the drive PCB.
ImageWriter II
rev. Jul 91
Troubleshooting / 3. 7
Paper Feed
Problems
Solutions
•
Grinding during
paper feed
2.
1. Remove the platen knob to verify that there are
no obstructions in the gearing beneath the knob.
Adjust the paper guide (refer to Section 4,
Adjustments).
3. Replace the paper feed motor.
4. Replace the drive PCB.
•
Paper-out sensor is
– Bend the mechanical paper sensor slightly
interfering with paper
lower into the platen cradle.
path; left side of paper
fits "tighter" under the
platen than does the
right side
3.8 / Troubleshooting
rev. Apr 88
ImageWriter II
Miscellaneous
Problems
Solutions
•
Hexadecimal data
is printed
– Power the printer off then on.
•
IC3 on Drive PCB
is visibly blown
– Replace linefeed motor, drive PCB, and CPU PCB.
WARNING : Check IC3 on the Drive PCB. If it is visibly
blown, replace the linefeed motor, drive PCB, and CPU
PCB. Failure to replace all three modules may result in
additional blown modules.
•
Power supply keeps
going bad
ImageWriter II
– Verify that the cut sheet feeder wires are not
pinched. If the wires are pinched, lift the chassis and
reposition them.
rev. Aug 87
Troubleshooting / 3. 9
o IMAGEWRITER II FLOW CHARTS
Power Light Not Lit
1. To check the fuses (printer should be off):
IMPORTANT : Remove the mechanical assembly from
the printer before you check the fuse on the noise filter
PCB assembly.
a) Set the digital multimeter to measure 200 ohms
resistance.
b) Remove and check the fuses on the drive PCB one
at a time.
c) All fuses should measure 0.00 (indicating
continuity).
2. To check the power switch before removal (printer
should be off):
a) Disconnect the plug-in connectors running from
the power switch to the right support leg.
b) Set the digital multimeter to measure 200 ohms
resistance.
c) Insert the probes into the connectors, making sure
you test white wire with white wire, and black wire
with black wire.
When the switch is up or in the off position, you
should get a reading of 1, indicating there is no
connection. When the switch is down or in the on
position you should get a reading of 0 for
continuity.
d) Insert the probes into the connectors, checking
black wire with white wire. A reading of 1,
regardless of the position of the switch, should be
displayed.
3.10 / Troubleshooting
rev. Jul 88
ImageWriter II
TABLE
1
CARRIER MOVEMENT PRESENT
NO CARRIER MOVEMENT
IS THE
AC POWER
CORD
CONNECTED?
REPLACE
OPERATION PANEL.
NO
CONNECT THE POWER CORD.
YES
POWER
LIGHT ON?
NO
REMOVE AND CHECK
5A AND 1A FUSES
ON THE DRIVE PCB
(SEE TABLE 1 NOTES, #1).
NO
POWER
LIGHT ON?
YES
GO TO TABLE 2.
YES
GO TO TABLE 2.
FUSES
OK?
NO
REPLACE FUSES.
YES
REPLACE
TRANSFORMER.
NO
POWER
LIGHT ON?
YES
GO TO TABLE 2.
YES
POWER
LIGHT ON?
GO TO TABLE 2.
NO
REPLACE
DRIVE PCB.
GO TO TABLE 2.
YES
POWER
LIGHT ON?
NO
REPLACE FILTER BOARD.
REMOVE AND CHECK 2A FUSE.
SEE TABLE 1 NOTES, #1.
GO TO TABLE 2.
YES
POWER
LIGHT ON?
NO
REPLACE POWER SWITCH.
(SEE TABLE 1 NOTES, #2).
GO TO TABLE 2.
ImageWriter II
YES
POWER
LIGHT ON?
rev. Aug 87
NO
RETURN TO
BEGINNING OF TABLE 1.
Troubleshooting / 3. 11
Power Light On,
No Printing
1. To check the Form Feed switch on the operation
panel (printer should be off):
a) Set the multimeter to measure 200 ohms
resistance.
b) Place the probes on pin 12 and pin 13 of the
operation panel connector. The reading should
show no connection (1).
c) Depress the Form Feed switch. The reading
should show continuity (0.00).
2. To check the flexible cable and the Head PCB:
a) Detach the flexible cable from the drive board.
b) Locate the home position switch (under the left
side of the ribbon carrier on the Head PCB).
c) Set the digital multimeter to measure 200 ohms
resistance.
d) Place the probes on pin 10 and pin 12 on the
flexible cable.
e) Push the home position switch on the Head PCB.
The reading should be 0.00 when the switch is
depressed. When the switch is released, the
reading should be 1.
3. Manually move the carrier back and forth. If it will not
move, inspect the following:
a) Check the ribbon cartridge to be sure the ribbon is
wound when the knob is turned in the direction of
the arrow.
b) Check the carrier shaft and carrier belt for damage
and foreign materials.
c) Check the ribbon wire for dislocation and damage.
d) Perform carrier shaft maintenance (see Section 1,
Basics ).
4. To check for correct jumper position on the PCB
board, see "Paper Sensor and Logic Board
Compatibility" in Section 5, Additional Procedures.
3.12 / Troubleshooting
rev. Jul 88
ImageWriter II
TABLE 2
Power Light On
No Printing
RUN SELF-TEST.
CHECK FORM FEED SWITCH
ON OPERATION PANEL.
(SEE TABLE 2 NOTES, #1.)
NO
PRINTS
SELF-TEST?
NOTE
IF SELF-TEST SHOWS POOR
QUALITY PRINT, GO TO
TABLE 5 AS INSTRUCTED.
YES
YES
SWITCH
OK?
GO TO TABLE 5.
NO
REPLACE
OPERATION PANEL.
PRINTS
SELF-TEST?
NO
CHECK FLEXIBLE CABLE
CABLE AND HEAD PCB
(SEE TABLE 2 NOTES, #2.)
YES
FLEXIBLE
CABLE AND HEAD
PCB OK
GO TO TABLE 5.
YES
PRINTS
SELF-TEST?
YES
NO
GO TO TABLE 5.
REPLACE FLEXIBLE CABLE
AND HEAD PCB.
GO TO TABLE 6.
YES
NO
PRINTS
SELF-TEST?
NO
YES
PRINTS
SELF-TEST?
GO TO TABLE
6.
REPLACE
MAIN CPU PCB.
NO
CHECK CARRIER
(SEE TABLE 2 NOTES, #3.)
CHECK / CORRECT PCB JUMPERS
(SEE TABLE 2 NOTES, #4.)
YES
GO TO TABLE
7.
PRINTS
SELF-TEST?
NO
CARRIER
MECHANISM
NORMAL?
YES
REPLACE DRIVE PCB.
NO
PRINTS
SELF-TEST?
REPLACE
ANY DEFECTIVE PARTS.
PRINTS
SELF-TEST?
YES
YES
NO
NO
REPLACE
CARRIER MOTOR.
PRINTS
SELF-TEST?
GO TO
TABLE 5.
YES
GO TO TABLE 5.
NO
GO TO TABLE 3.
ImageWriter II
rev. Jul 88
Troubleshooting / 3. 13
No Paper Feed
1. To check the paper feed mechanism, insert paper and
turn the platen knob. Make sure the gears to the left of
the platen mesh properly.
2. To check the form-feed and line-feed switches on the
operation panel (printer should be off):
a) Set the digital multimeter to measure 200 ohms
resistance.
b) Place the probes on pin 12 and pin 13 of the
operation panel connector. The reading should
show no connection (1).
c) Depress the form feed switch. The reading should
show continuity (0.00).
d) Place the probes on pin 11 and pin 13 of the
operation panel connector. The reading should
show no connection (1).
e) Depress the line-feed switch. The reading should
show continuity (0.00).
3. To check the paper feed motor (printer should be off):
a) Set the digital multimeter to measure 200 ohms
resistance.
b) At the cable connector end (disconnected from the
drive PCB), check the resistance values between
pins 6 and 4, 6 and 2, 5 and 1, and 5 and 3 (pin 1
is the black wire). The value for each reading
should be approximately 22 ohms.
c) Check the resistance values between pins 3 and 1,
and 2 and 4. The value for each reading should
be approximately 44 ohms.
3.14 / Troubleshooting
rev. Apr 87
ImageWriter II
TABLE 3
NOTE
NO PAPER FEED
(POWER LIGHT LIT)
IF SELF TEST SHOWS POOR
QUALITY PRINT GO TO
TABLE 5 AS INSTRUCTED.
CHECK PAPER FEED MECHANISM.
(SEE TABLE 3 NOTES, #1).
PAPER FEED
MECHANISM
OK?
NO
YES
SWITCHES
OK?
REPLACE
DEFECTIVE PARTS.
NO
PRINTS
SELF TEST?
CHECK LINE FEED AND
FORM FEED SWITCHES ON
OPERATION PANEL. SEE
(TABLE 3 NOTES, #2).
NO
REPLACE
OPERATION PANEL.
NO
PRINTS SELF
TEST?
YES
REPLACE DRIVE PCB.
YES
PRINTS
SELF TEST?
YES
GO TO TABLE 5.
YES
GO TO TABLE 5
NO
CHECK PAPER FEED MOTOR
(SEE TABLE 3 NOTES, #3).
PAPER FEED
MOTOR OK?
GO TO TABLE 5.
YES
NO
REPLACE
PAPER FEED MOTOR.
PRINTS
SELF TEST?
NO
REPLACE
MAIN CPU PCB.
YES
PRINTS
SELF TEST?
NO
GO TO TABLE 2.
GO TO TABLE 5.
YES
GO TO TABLE 5.
ImageWriter II
rev. Jul 88
Troubleshooting / 3. 15
Ribbon Color
Selection Fails
1. Examine the color ribbon assembly (printer should
be off). Verify that the black tabs on the ribbon plate
ride on the spiral ridge of the ribbon cam.
Verify that the ribbon cam is tight. Also check the
copper tab mounted behind and below the ribbon
cam. When the cam is all the way up, the vertical
ridge on the cam should hit the tab. If the color ribbon
assembly is loose, the ribbon cam is misaligned. For
color printing adjustment procedures, turn to Section
4, Adjustments.
2. Check the flexible cable and the ribbon motor (printer
should be off):
a) Detach the flexible cable from the drive PCB.
b) Set the digital multimeter to measure 200 ohms
resistance. Detach the flexible cable from the drive
PCB.
c) On the flexible cable, check the resistance
between pins 3 and 7, 5 and 7, 4 and 8, and 6 and
8. Each should read approximately 120 ohms.
d) Check the resistance values between pins 3 and 5
and pins 4 and 6. Each should read approximately
240 ohms. If the readings are not approximately
240 ohms, the carrier ribbon will drive down but
not up. Replace the flexible cable.
3.16 / Troubleshooting
rev. Apr 91
ImageWriter II
TABLE 4
RIBBON COLOR SELECTION FAILS
NOTE
IF SELF TEST HAS POOR
QUALITY PRINT GO TO
TABLE 5 AS INSTRUCTED
CHECK THE RIBBON SHIFT CAM POSITION
(SEE TABLE 4 NOTES, #1).
RIBBON
SHAFT CAM POSITION
NORMAL?
NO
ADJUST THE RIBBON SHIFT MECHANISM.
YES
PRINTS
SELF TEST?
NO
REPLACE DRIVE PCB.
PRINTS
SELF TEST?
YES
YES
GO TO TABLE 5.
GO TO TABLE 5.
NO
CHECK FLEXIBLE CABLE
AND RIBBON MOTOR
(SEE TABLE 4 NOTES, #2).
FLEXIBLE CABLE
AND RIBBON MOTOR
OK?
REPLACE
MAIN CPU PCB
YES
PRINTS
SELF TEST?
YES
NO
NO
RETURN TO BEGINNING OF TABLE 4.
REPLACE
THE FLEXIBLE CABLE
PRINTS
SELF TEST?
YES
GO TO
TABLE 5.
NO
REPLACE
RIBBON MOTOR.
PRINTS
SELF TEST?
NO
YES
GO TO TABLE 5.
ImageWriter II
rev. Jul 88
Troubleshooting / 3. 17
GO TO TABLE 5.
Print Quality
Problems
1. Check the shims (see Section 5, Additional
Procedures).
2. Check the paper guide positioning (refer to Section 4,
Adjustments).
3. Perform the ribbon adjustment (refer to Section 4,
Adjustments).
4. To check the flexible cable (printer should be off):
a) Detach the flexible cable from the drive PCB and
remove the print head.
b) Set the digital multimeter to measure 200 ohms
resistance.
c) Check for continuity between the pins shown
below:
HEAD CONNECTOR
B2
B3
B4
B5
B6
B7
B8
B9
B10
A2
A3
A4
A5
A6
A7
A8
A9
A10
FLEXIBLE CABLE
27
26
19
18
22
23
15
30
14
25
28
17
20
24
21
13
29
16
PIN 1
FLEXIBLE CABLE
PIN 30
10 9 8 7 6 5 4 3 2 1
B
10 9 8 7 6 5 4 3 2 1
A
HEAD CONNECTOR TOP VIEW
5. To check the print head:
a) Set the digital multimeter to measure 200 ohms
resistance.
b) Remove the print head and place it PCB-side down with the edge connectors facing you. Place
one probe of the multimeter on each side of the far right metal finger of the print head. The resistance
should be approximately 3 ohms.
3.18 / Troubleshooting
rev. Aug 91
ImageWriter II
TABLE 5
PRINT QUALITY PROBLEMS
(POOR QUALITY, NO PRINT, OR DOTS MISSING)
NO
IS PRINTOUT
NOTICEABLY LIGHTER
OR DARKER
ON ONE SIDE?
NO
DOTS ARE
MISSING FROM
CHARACTERS?
YES
YES
CHECK SHIMS
(SEE TABLE 5 NOTES, #1A).
NO
PROBLEM
CORRECTED?
PERFORM RIBBON ADJUSTMENT
(SEE TABLE 5 NOTES, #1C).
PROBLEM
CORRECTED?
YES
ALIGN PAPER GUIDE
(SEE TABLE 5 NOTES, #1B).
GO TO TABLE 6.
NO
PAPER GUIDE
ALIGNED?
NO
YES
CHECK FLEXIBLE CABLE
(SEE TABLE 5 NOTES, #2).
FLEXIBLE
CABLE OK?
YES
NO
REPLACE
FLEXIBLE CABLE.
PRINT
QUALITY OK?
CHECK PRINT HEAD
(SEE TABLE 5 NOTES, #3).
NO
YES
GO TO TABLE 6.
PRINT
HEAD OK?
YES
REPLACE
DRIVE PCB.
NO
PRINT
QUALITY OK?
REPLACE
PRINT HEAD.
YES
GO TO TABLE 6.
NO
PRINT
QUALITY OK?
NO
REPLACE
MAIN CPU.
YES
GO TO TABLE 6.
PRINT
QUALITY OK?
YES
GO TO TABLE 6.
NO
RETURN TO
BEGINNING OF TABLE 5.
Option Card
Malfunctioning
1. ImageWriter II switch 2-4 must be in the closed/on
position when an Option Card is installed.
2. If the Memory Option Card is installed and switch 2-4
is set correctly, a RAM verification test is performed
ImageWriter II
rev. Aug 87
Troubleshooting / 3. 19
when the printer is turned on. If the printer comes
ready, the RAM on the Memory Option Card is good.
3. If you do not know how to use NodeCheck, see the
AppleTalk Cables and Connectors Technical
Procedures , Diagnostics Section.
3.20 / Troubleshooting
rev. Aug 87
ImageWriter II
TABLE 6
OPTION CARD MALFUNCTIONING
NOTE:
ONLY ONE OPTION CARD
MAY BE INSTALLED
AT ANY GIVEN TIME
MEMORY CARD OPTION INSTALLED.
CHECK DIP SWITCHES.
SEE TABLE 6 NOTES, #2.
EXCHANGE
MEMORY
OPTION
CARD.
TURN PRINTER ON.
SELF-CHECK IS PERFORMED.
SEE TABLE 6 NOTES, #2.
APPLETALK OPTION CARD INSTALLED.
YES
CHECK DIP SWITCHES.
SEE TABLE 6 NOTES, #1.
DOES
ERROR LIGHT
FLASH?
NO
PERFORM SELF-TEST.
CONNECT THE PRINTER TO A COMPUTER.
CARD
RECOGNIZED IN
PRINTOUT?
NO
REPLACE:
1. APPLETALK
CARD
2. MAIN CPU PCB
PRINTS
3 PAGE DOCUMENT
& ALLOWS YOU TO
KEEP WORKING?
END
YES
NO
CONNECT PRINTER TO
NODECHECK.
REPLACE MEMORY OPTION CARD.
BOOT NODECHECK ON
NETWORK.
SEE TABLE 6 NOTES, #3.
PRINTER
CAN BE
SEEN?
NO
GO TO
APPLETALK
NETWORK
TROUBLESHOOTING
REPLACE MAIN CPU PCB.
PRINT TO PRINTER
USING NODECHECK.
NO
GO TO
APPLETALK
NETWORK
TROUBLESHOOTING
PRINTS
3 PAGE DOCUMENT
& ALLOWS YOU TO
KEEP WORKING?
END
NO
YES
GO TO BEGINNING OF TABLE 6.
END
ImageWriter II
END
NO
YES
PRINTS?
PRINTS
3 PAGE DOCUMENT
& ALLOWS YOU TO
KEEP WORKING?
rev. Aug 87
Troubleshooting / 3. 21
Final Test
1. Refer to the Technical Procedures Peripheral
Interface Guide for directions on setting the printer
switches correctly.
2. Check the ImageWriter II Owner's Manual for more
information on the correct cable to use.
3.22 / Troubleshooting
rev. Aug 87
ImageWriter II
TABLE 7
FINAL TESTING
SELF TEST
OK?
YES
CONNECT THE PRINTER
TO A COMPUTER
(SEE TABLE 7 NOTES, #1).
PRINTS FROM
THE COMPUTER?
YES
END
NO
RECHECK CONNECTIONS
AND SETTINGS
(SEE TABLE 7, #1).
CONNECTIONS AND
SETTINGS OKAY?
YES
NO
CABLE OK?
FIX CONNECTIONS
AND SETTINGS
PRINTS FROM
THE COMPUTER?
CHECK INTERFACE CABLE
(SEE TABLE 7 NOTES, #2).
YES
REPLACE
MAIN CPU PCB.
NO
NO
REPLACE
PRINTER INTERNAL
CONNECTOR CABLE.
PRINTS FROM
THE COMPUTER?
YES
END
NO
YES
PRINTS FROM
THE COMPUTER?
NO
TRY DIFFERENT
COMPUTER.
END
YES
PRINTS FROM
THE COMPUTER?
END
NO
RETURN TO
BEGINNING
OF TABLE 7.
YES
END
ImageWriter II
rev. Aug 87
Troubleshooting / 3. 23
8. Turn the printer upside down.
9. On later models, connect the two-wire cable that
comes from the power switch assembly to the cable
that comes from inside the right leg.
10. Replace the bottom cover (metal portion).
11. Replace the left and right support legs , if necessary.
12. Replace the top cover .
13. Replace the tractor cover and the paper cover.
14. Perform the self-test.
2.66 / Take-Apart
rev. Aug 91
ImageWriter II
 Apple Technical Procedures
ImageWriter II
Section 4 – Adjustments
o CONTENTS
4.3
4.4.
4.6
4.7
4.8
4.9
4.10
4.11
ImageWriter II
Ribbon Assembly
New Assembly
Old Assembly
Firing Hammer
Impression Lever
Carrier Belt
Paper Guide
Apple II Peripherals Diskette
rev. May 89
Adjustments / 4.1
4.2 / Adjustments
rev. Sep 88
ImageWriter II
o RIBBON ASSEMBLY
This adjustment should be performed when
•
The color print function fails
•
The color ribbon assembly has been replaced
•
Dots are missing or no printout is seen when using a
black ribbon
There are three possible versions of the ribbon assembly
currently in circulation: two newer assemblies and one
older assembly. If you have an ImageWriter II with a
serial number of 244451 or above, you have one of the
newer assemblies and will have the color ribbon
assembly shown in Figure 1. One of the assemblies is
adjustable; the other isn't. To find out which assembly
you have, try following the "New Assembly" procedure. If
you cannot turn the top of the assembly (do not force it or
the red locking ring), then you have a nonadjustable
version of the assembly and you must install a new
assembly. If the top assembly turns, then follow the rest
of the procedure for the new assembly. The older
version is shown in Figure 2. For this version, follow the
"Old Assembly" procedure. Before you begin either
procedure, perform the steps below:
1. Run the self-test and examine the colors printed. The
colors should be black, yellow, red, blue, orange,
green, and purple. You should see no overlapping.
The self-test should produce one line of each color
and then repeat the same sequence of colors until
stopped. If the test doesn't perform as described, or if
the colors overlap, continue with step 2.
2. Switch off the printer and remove the paper cover.
ImageWriter II
rev. May 89
Adjustments / 4.3
New
Assembly 2
If you have the new version of the color ribbon
assembly (serial number ------- or above), perform the
following steps:
1. Remove the ribbon (access to the ribbon adjustment is
easier with the ribbon removed, although it is not
absolutely necessary).
2. Locate the color ribbon assembly (Figure 1, #1).
3. In this step you are going to push and turn the red
spring–loaded assembly (Figure 2, #1) to make the
adjustment.
a) First, to determine which way to turn the top
assembly, examine the self-test printout. (If the
adjustment is correct, the first line is black.)
If the bottom half of the letters are missing in
the
first (black) line, push and turn the red
spring –
loaded assembly clockwise.
If the first line is printed with the top half of
the
letters missing (or half blue), turn the red
spring –
loaded assembly counterclockwise.
?
Note:
Before you begin the adjustment,
push down the red locking ring (Figure 1, #2), and
then
hold it while making the adjustment. The
locking
ring prevents the adjustment from
changing once it
is set.
b) Grasp the red spring–loaded assembly and
turn
it in the correct direction in eighth turn
increments
to rectify the condition.
4.4 / Adjustments
rev. Sep 88
ImageWriter II
New
Assembly 2
If you have the new version of the color ribbon
assembly (serial number 244451 or above), perform the
following steps:
1. Remove the ribbon (access to the ribbon adjustment is
easier with the ribbon removed, although it is not
absolutely necessary).
2. Locate the color ribbon assembly (Figure 1, #1).
3. In this step you are going to turn the top assembly to
make the adjustment.
a) First, to determine which way to turn the top
assembly, examine the self-test printout. (If the
adjustment is correct, the first line is black.)
If the bottom half of the letters are missing in
the
first (black) line, turn the top assembly
clockwise.
If the first line is printed with the top half of
the
letters missing (or half blue), turn the top
assembly
counterclockwise.
Note:
Before you begin the adjustment,
push down the red locking ring (Figure 1, #2), and
then
hold it while making the adjustment. The
locking
ring prevents the adjustment from
changing once it
is set.
b) Grasp the top of the assembly—the part that has
the arrow imprinted on it (Figure 1, #3)—and
turn
the top in the correct direction two full
turns.
(Two turns are recommended to start
with; it is
possible that more or fewer than two
turns will
be needed to rectify the condition.)
ImageWriter II
rev. May 89
Adjustments / 4.5
3
1
2
FIGURE 1
4. Reinstall the ribbon and the top cover, and rerun the
test.
5. Check the print results to see if the condition has
improved, deteriorated, or has stayed the same.
6. Repeat steps 3 and 4 until all the colors are solid,
without any overlapping—or, if using a black ribbon
only, until no dots are missing.
4.6 / Adjustments
rev. Sep 88
ImageWriter II
Old
Assembly
If you have an older version of the color ribbon
assembly, perform the following steps:
1. Locate the color ribbon assembly (Figure 2, #1).
2
3
1
FIGURE 2
2. Loosen the lock nut (Figure 2, #2), and turn the
adjustment nut (Figure 2, #3) one-half turn. To
determine which way to turn the adjustment nut,
examine the self-test printout. The first line should be
black.
If the bottom half of the letters are missing in the first
(black) line, turn the adjustment nut clockwise.
If the first line is printed with the top half of the letters
missing (or half blue), turn the adjustment nut
counterclockwise.
3. Tighten the lock nut. Run the self-test and examine
the printout. Repeat step 2 if the self-test is
overlapping. This self-test may need to be repeated
several times.
4. When the colors are printed correctly with no
overlapping, the adjustment is complete.
ImageWriter II
rev. May 89
Adjustments / 4.7
o FIRING HAMMER
The firing hammer adjustment should only be
done when the carrier belt, carrier shaft, carrier
motor, or PC board is replaced.
1. Connect the printer to a computer.
2. Power on the printer and the computer.
3. Print a few lines of the capital letter "H."
Check the printed letters for any misalignment. See
Figure 3 for an example of alignment.
ALIGNED HHHHH
HHHHH
MISALIGNED HHHHH
HHHHH
FIGURE 3
4. If the letters are misaligned , remove the carrier
cover and change the settings of DIP switches 2-5 and
2-6. Change only one switch at a time.
5. Perform step 3 again. Repeat the procedure until the
lines of the capital letter "H" are aligned.
4.8 / Adjustments
rev. Sep 88
ImageWriter II
o IMPRESSION LEVER
The impression lever is located under the carrier cover, to
the extreme right (see Section 3, Take-Apart, for more
information). This lever (Figure 4, #1) moves the dot
head away from or closer to the platen. Adjust the
position of the lever if the print quality is too light or too
dark.
FIGURE 4
If the print is still too light or too dark after you have
moved the impression lever, adjust the lever using the
adjustment screw (Figure 4, #2).
ImageWriter II
rev. May 89
Adjustments / 4.9
o CARRIER BELT
The adjustment screw, which increases or decreases the
amount of tension on the carrier belt, is located under the
carrier cover, to the right (Figure 5,
#1).
1
2
FIGURE 5
To adjust the carrier belt, loosen the adjustment screw
and push the metal plate (Figure 5, #2) below the screw
to the left until the tension on the carrier belt is as loose
as you want it.
4.10 / Adjustments
rev. Sep 88
ImageWriter II
o PAPER GUIDE
To adjust the paper guide, loosen the two screws (Figure
6, #1) and slide the paper guide either forward or
backward until the gap is the correct width; then tighten
the screws.
ILLUSTRATION NOT AVAILABLE
FIGURE 6
To verify that the paper guide is adjusted correctly, the
impression lever should be all the way forward. When it
is correctly positioned, the paper guide will move
approximately .0005 inches when you press it toward the
platen at the center. Verify this by rolling two sheets of
copy paper under the platen. The paper guide should
then be snug with little or no movement toward the platen.
ImageWriter II
rev. May 89
Adjustments / 4.11
o APPLE II PERIPHERALS DISKETTE
The Apple II Peripherals Diskette will perform the
following tests:
•
•
•
•
•
•
•
Character Set
Alternate Sets
Custom Character
Graphic Images
Margins/Tabs
Registration (Firing Hammer)
Color
The two tests used for adjustment purposes are the
Registration (Firing Hammer) and the Color tests. If you
do not have the diskette, use the procedures in this
section to make the necessary adjustments.
4.12 / Adjustments
rev. Sep 88
ImageWriter II
 Apple T echnical Procedures
ImageWriter II
Section 5 – Additional Procedures
• CONTENTS
5.2 Shims
5.2
Materials Required
5.3
Check the Gap
5.4
Install
5.5
Remove
5.6 Paper Sensor and Logic Board Compatibility
5.6
Identification
5.6
Logic Boards
5.8 Optical Sensor Kit Assembly
5.8
Materials Required
5.8
Disassembly
5.18
Reassembly–Part 1 Optical Assembly
5.20
Reassembly–Part 2 Logic Board Modification
5.23
Reassembly–Part 3 Remaining Printer Parts
Note: If a step is underlined, detailed instructions for that
step can be found in T ake-Apart.
• SHIMS
A shim is a small 3-sided metal piece with two holes on one
side (Figure 1). The shim is used to correct the distance
between the print head and the platen.
FIGURE 1
IMPORTANT: Before performing this procedure, check
the cam washer on the left side of the carrier shaft to be
sure it is in position (Figure 2). The narrower part of the hole
in the cam should be in the top position when placing the
cam on the carrier shaft. Refer to Section 2, T ake-Apart,
"Carrier Block Assembly and Print Head PCB," for complete
instructions.
FIGURE 2
Materials Required
Shims (.002 inches, .004 inches, and .008 inches)
Feeler gauge
Phillips screwdriver
Small needlenose pliers
Check the Gap
1. Remove the paper cover and ribbon cartridge.
2. Gently pull the impression lever up, so that the dot head
is in the closest position.
Note: The recommended gap for the following readings
should be approximately .013 inches plus or minus .002
inches (0.33 mm).
FIGURE 3
3. Push the carrier assembly to the far right. Then, using a
feeler gauge, measure the gap between the front ofthe
printhead and the metal shield on the paper guide
(Figure 3, #1). Record the measurement.
4. Push the carrier assembly to the far left. Then use the
feeler gauge to measure the gap between the front of
the printhead and the metal shield on the paper guide.
Record the measurement.
5. Subtract the right-side gap (measured in step 3) from the
left-side gap (measured in step 4).
Install
•
If the difference is a positive number , go to "Install."
•
If the difference is a negative number , go to "Remove."
To install a shim:
1. Select a shim whose thickness is closest to the
difference calculated.
a) .002 inches (0.05 mm)
b) .004 inches (0.1 mm)
c) .008 inches (0.2 mm)
FIGURE 4
2. Push the carrier shaft toward the rear of the machine.
Using needlenose pliers, install the shim on the left
side of the carrier bar by inserting the two protruding
tabs into the holes on the shim (Figure 4, #1). Slide the
shim into position. Release the carrier shaft.
3. Verify that the gap is now correct.
4. Replace the ribbon cartridge and the paper cover .
5. Perform the self-test.
Remove
To remove a shim:
1. Look at the left side of the carrier shaft. (Figure 4, #1).
• If there is a shim installed, remove it with needlenose
pliers.
• If there is no shim installed, be sure the cam washer
on the left side is positioned correctly .
2. Verify that the gap is now correct.
3. Replace the ribbon cartridge and the paper cover .
4. Perform the self-test.
• PAPER SENSOR AND LOGIC BOARD COMP ATIBILITY
In February 1987 a new logic board, paper sensor , and
paper-empty guide were implemented in the ImageWriter II.
The following information explains how to identify these
new components and how to resolve the compatibility
issues.
Identification
There are two ways to identify the paper sensor:
1. Look at the left side of the platen assembly .
•
If there is a paper-empty plate (Figure 5, #1), the
mechanical paper sensor is installed.
•
If there is no paper-empty plate, the optical sensor is
installed.
FIGURE 5
2. Examine the logic board.
•
Logic Boards
If it is an old version, it is a mechanical paper sensor
If it is a new logic board, check the selector switch
setting and the connector (CN9 or CN1 1) as
explained below.
There are two versions of the main CPU PCB. The type of
paper sensor in the machine reflects which version may be
installed.
.
The new logic board supports both paper
sensors and has:
•
A selector switch that allows this board to be used
with both the mechanical and the optical paper
sensor (Figure 6, #1). If a mechanical paper sensor
is installed, the jumper should be on pins 1 and 2. If
an optical paper sensor is installed, the jumper
should be on pins 2 and 3. An extra connector ,
CN11, that is used for the optical paper sensor
(Figure 6, #2). Connector CN9 is used for the
mechanical paper sensor (Figure 6, #3).
•
A new ROM version that supports both paper
sensors.
FIGURE 6
The old logic board only supports the mechanical
paper sensor unless it is modified. See the
Optical Sensor Kit Assembly procedure, which
follows.
• OPTICAL SENSOR KIT ASSEMBL Y
The optical sensor works with either the new CPU PCB or
the old one. For the optical sensor to work with the old logic
board, you must modify the logic board by adding the
daughter board from the optical sensor kit.
WARNING: his installation involves soldering a jumper
wire onto a four-layer board. If you are not an experienced
solder technician, do not attempt this procedure.
Procedures for steps that are underlined can be found in
Section 2, T ake-Apart.
Materials Required
ImageWriter II printer
ESD-safe workstation
#2 Phillips screwdriver
#1 Phillips screwdriver
#2 flathead screwdriver
Double-ended scribe
1/16-inch or 2-mm pin punch
Soldering iron
Disassembly
1. Before beginning:
a) Set up an ESD–Safe workstation and use ESD
safety measures throughout the following procedure.
(Refer to You Oughta Know T echnical Procedures.
b) Verify printer functions by running self-test and repair
any fault conditions before continuing.
2. Remove the power cord from the printer .
3. Remove the paper, the ribbon, and the tractor covers.
4. Remove the ribbon cartridge and the print head.
FIGURE 7
5. Remove the platen knob (Figure 8, #1) and the paper
release lever (Figure 8, #2)
FIGURE 8
6. Push the carriage assembly all the way to the left side of
the printer .
7. Loosen the two screws (Figure 9, #1) that secure the
front cover , and remove the cover .
8. Be sure to detach the control panel cable from its
connector (Figure 9, #2) on the right side of the main
logic board.
FIGURE 9
9. Remove the two screws (Figure 10, #1) that hold the paper
guide in place, and remove the paper guide.
FIGURE 10
10. Turn the printer up so that it rests on its front side and
the screws holding the right and left support legs face
you. Remove the two screws and the support legs by
pulling the legs toward you and then out. Slide the AC
socket out of the right leg and the pin socket from the
left leg. Bring the printer back down to its operating
position.
11. Release the connectors at locations CN3 and CN9
(Figure 1 1, #1 and #2) from the left side of the main
logic board. Release the gray ribbon connector
(Figure 1 1, #3).
FIGURE 1 1
12. Remove the old mechanical paper–sensor ground
screw (Figure 12, #1) from the left platen bushing plate
and discard the screw .
FIGURE 12
13. Remove the two screws (Figure 13, #1) that secure the
upper mechanical assembly frame to the printer case.
FIGURE 13
14. Remove the sheetfeeder option plug screws and
bracket (Figure 13, #2) at the back of the printer . Gently
push this connector to the rear of the printer off its
mount. This step is important when separating the
mechanical assembly from the printer case.
IMPORTANT: Failure to release the sheet feeder
option plug from its mount will prevent the separation of
the mechanical assembly and the printer case.
15. Remove the two shock mount screws (Figure 13, #3)
located in the bottom of the printer below the carriage.
After removing the screws, move the carriage assembly
all the way to the right.
16. Locate the three plastic locking tabs (Figure 14, #1) on
the inside of the printer case above the mechanical
assembly and below the tractor assembly . Carefully
push back on the rear of the printer case, releasing the
tabs that help secure the mechanical assembly to the
printer case. As you push back on these tabs, gently lift
the mechanical assembly by pulling up on the tractor
assembly. Make certain the sheetfeeder option plug is
pushed off its mount.
FIGURE 14
17. Pull off the black plastic friction/tractor adjustment piece
(Figure 14, #2) from the right side of the platen and
place it between the frame and the printer case just
above the transformer (Figure 14, #3). This piecewill
act as a wedge and will support the mechanical
assembly at the height necessary to perform the
remaining steps of this procedure. The long leg that
fits down into the paper friction gears will rest on the
back side of the plastic case.
(This step shortens the amount of time required to take
the printer apart and allows you access to all the parts
you need to install the optical sensor kit.)
18. Remove the screws holding the left and right platen
bushing plates (the silver plates at each end of the
platen—see Figure 15, #2 and #3) and remove the
bushing plates. (Y ou removed the grounding screw
(Figure 15, #4) in a preceding step.
19. Using the needlenose pliers, remove the paper bail
roller arm retention springs (Figure 15, #1) and lift the
paper bail all the way up and back.
20. Remove the platen and place it on a smooth flat
surface.
FIGURE 15
FIGURE 16
21. Remove the bushing and gear (Figure 16, #1) from the
left side of the platen. Using a 1/16-inch or 2-mm pin
punch, carefully tap the split–sleeve pin (Figure 16, #2)
all the way through the platen shaft and pull it out. (This
pin will be reused, so do not damage it.)
CAUTION: To avoid damage to the platen end shaft,
do not apply excessive force while removing the pin.
22. Remove the old mechanical paper–empty sensor frame
(Figure 16, #3).
23. Replace the split sleeve pin in the platen shaft (Figure
16, #2) and reinstall the gear and bushing (Figure 16,
#1).
24. Remove the three screws (Figure 17, #1) that hold the
paper guide in place.
FIGURE 17
25. Push the carrier to the left; then gently unhook each of
the three tabs (Figure 17, #2) with a small
flatbladescrewdriver . Push the carrier to the right; then
gentlyunhook each of the remaining two tabs (Figure
17, #3) with a small flatblade screwdriver .
26. Lift off and remove the two pinch rollers (Figure 18, #1)
and metal plates (Figure 18, #2).
FIGURE 18
Reassembly – Part 1
Optical Assembly
1. Take the new paper guide assembly and optical sensor
from the Optical Sensor Kit and hold it as you would if
you were placing it in the printer . On the left side of the
paper guide assembly there will be an opening for the
optical sensor .
2.
Turn the paper guide upside down so that the three
screw holes are closest to you. Insert the optical
sensor (Figure 19, #1) into the opening so that the
wires come toward you.
CAUTION: The sensor wires must be routed correctly;
otherwise, they could catch underneath the paper
guide assembly on the pinch roller .
FIGURE 19
3.
Hold the wires against the underside of the paper guide
and route all of the wires through Slot A (Figure 19, #2)
while continuing to press the wires down against the
bottom of the paper guide. Direct any two of the wires
through Slot B (Figure 19, #3) and the third wire
through Slot C (Figure 19, #4).
4.
Turn the paper guide assembly over .
5.
Replace the pinch rollers (Figure 20, #2) and metal
plates (Figure 20, #1) in the openings on the new paper
guide. Make sure that the rollers sit flat in the opening.
FIGURE 20
6.
Pass the three wires beneath the carriage at the
opening on the left of the carriage, and then thread
them through the rear carriage assembly toward the
side of the printer . Route the optical sensor wires along
the line feed motor and down the left side of the printer ,
making sure the wires are seated as far as possible into
the groove along the side of the printer case. Y ou can
use the silver ground wire to help secure these wires.
Make sure that the wires do not end up under the
carriage assembly . Bring the connector from these
wires to the front of the printer so that it can be plugged
into the logic board.
7.
The next step is to reseat the paper guide, but before
you do that, make sure the left tractor guide is pushed
all the way to the left side. Then snap the paper guide
into place.
8.
Replace the three screws that hold the paper guide
assembly in place.
Reassembly – Part 2
Logic Board
Modification
Before you connect the sensor to the logic board, you
must determine which logic board (old or new) you
have. To do this, look at the left side of the logic board and
see if you have three connectors CN3, CN9, and CN1 1. If
you do, then you have the new logic board and you can use
the procedure below . If you do not have the three
connectors, then you have the old logic board and you
should skip to the procedure titled "Old Logic Board."
New Logic Board
If you have a new logic board (see Figure 21), pass the
optical sensor wires through the groove at the lower left of
the carriage and mount their 3-pin plug into the connector at
location CN1 1 (Figure 21, #1) on the main logic board.
Connector CN9 (Figure 21, #2) will remain unused. Be
sure the jumper switch (Figure 21, #3) at the top middle of
the board is on pins 2 and 3.
When this is done, skip the "Old Logic Board" procedure
and proceed to the reassembly of the printer .
FIGURE 21
Old Logic Board
To modify an old logic board (one that does not have the 3pin CN11 connector on its left side):
1. Remove the tension spring from above the upper right
corner of the logic board and unscrew the six screws
holding the board in place. Remove the board.
2. Find the one–inch jumper wire packaged with the
daughter board installation bracket in the Optical
Sensor Assembly Kit. You must solder this wire to the
underside of the main logic board between pin 4 of
connector CN3 (Figure 22, #1) and the positive terminal
of capacitor C1 (Figure 22, #2).
FIGURE 22
The cutaway view of connector CN3 (see Figure 23)
displays what could possibly happen to pin number 4
when heat is applied while soldering the jumper wire to
the main CPU board. If pin #4 is damaged, straighten
the pin before inserting the connector into the socket;
otherwise the single wire that is later installed into
connector CN3 could be dislodged.
FIGURE 23
3. Before attaching the daughter board and bracket from
the kit (Figure 24, #1), plug the yellow wire (Figure 24,
#2) from the daughter board into the open slot at
position 4 of female connector CN3 (Figure 24, #3). Be
sure the connector from this wire enters the slot with its
two tiny metal flanges facing away from the board.
FIGURE 24
4. Install the 2-pin connector (Figure 24, #4) from the
daughter board into the main logic board at location
CN9 (Figure 24, #5).
5. Screw the bracket onto the main logic board, being
careful not to bend or twist the capacitor at C16 on the
main logic board.
6. Match the screw holes (Figure 24, #6) on the daughter
board with the holes on the installation bracket, and
mount the board onto the bracket.
7. Replace the main logic board, its connectors, and the
tension spring. Be sure to screw in the ground lead at
the lower left corner of the board.
8. Pass the optical sensor wires through the groove at the
lower left of the carriage and mount the three-pin
connector from the sensor into connector CN1 on the
daughter board.
Reassembly – Part 3
Remaining
Printer Parts
1. Replace the platen. Be sure to remount the gears
and bushings properly , and remember that the left
side of the platen contains the split sleeve pin.
2. Gently push the paper guide against the platen and
tighten the two screws.
3. Bring the paper bail assembly back down over the
platen and reinstall the springs (Figure 25, #1).
FIGURE 25
4. Replace the left and right platen bushing plates. The left
bushing requires two screws (Figure 25, #3) and needs
to be held tightly in place against the metal frame while
seating the small tab on the very end of the paper bail
onto the small groove in the bushing. Also replace the
ground wire (Figure 25, #4).
The right bushing (Figure 25, #2) is somewhat similar
but needs only one screw . On the bushing itself is a
notch that must sit in a cut-out in the frame. Once these
bushings are installed, the tabs on each end of the
paper bail, when it is lifted up, should rest on the
grooves in the bushings.
5. Remove the black plastic friction adjustment piece
(Figure 26, #2) that has been supporting the frame at the
right rear of the printer (Figure 26, #3) and put it back on
the platen shaft, making sure that the teeth engage the
gear properly . Also make sure that the sheet feeder
sensor plug is exposed and its wires are securely
underneath the frame and not being crushed.
FIGURE 26
6. Reseat the frame in the printer by gently pushing back
on the rear of the printer case and lowering the metal
frame down under the three tabs of the case (Figure 26,
#1). The frame is seated properly when the two white
plastic plus-sign-(+)-shaped flanges, next to the shock
mount screws (Figure 27, #3) on the bottom are fully
exposed and no part of the frame is resting on them.
FIGURE 27
7.
Replace the two black shock mount screws at the
bottom of the frame (Figure 27, #3). (The shorter screw
mounts on the right side.
8.
Replace the sheet feeder sensor plug and its connector
plate (Figure 27, #2).
9.
Replace the two screws (Figure 27, #1) located above
the tractor assembly that secure the upper mechanical
assembly frame to the printer case.
10. Tip the printer so that it rests on the front part of the
case. Reinstall the legs, making sure that the tabs of
the power plug are in the grooves on the right leg and
that the pin connector is lodged properly on the left.
Verify that no wires are exposed. Screw the legs on.
11. Reinstall the paper lever (Figure 28, #2) and knob
(Figure 28, #1) on the right leg.
FIGURE 28
12. Carefully reinstall the print head (Figure 29, #1). V erify
that the print head is entering its slot smoothly and that
none of the metal fingers in the slot are being bent.
FIGURE 29
13. Slide the carriage assembly all the way to the left. Plug
the control panel cable from the top cover into its
connector on the logic board, and secure the cover .
14. Replace the paper and tractor covers.
15. Power on the printer and test it thoroughly
.
 Apple Technical Procedures
ImageWriter II
Section 6 – SheetFeeder
o CONTENTS
6.2
6.2
6.3
6.3
6.4
Introduction
Things to Remember
Testing the SheetFeeder
Troubleshooting the SheetFeeder
Materials Required
Take-Apart
6.5
Housing and Paper Tray
6.9
Frame Assembly
6.11 PCB Assembly and Housing Assembly
6.13 Paper Tray Assembly
Note: If a step is underlined, detailed instructions for that
step can be found in the Take-Apart section.
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 1
o INTRODUCTION
The SheetFeeder allows you to use letterhead or other
single-sheet paper in an ImageWriter II. For detailed
instructions on installation, use, and care, see the
ImageWriter II SheetFeeder Installation Manual.
For
more information about a specific part, refer to the
SheetFeeder Illustrated Parts at the end of this tab.
Things to
Remember
1. Make sure that the SheetFeeder is seated properly
and that its edges align properly with ImageWriter II.
2. Put the paper release lever in the friction-feed
position.
3. Make sure that the paper is pressed against the
feeder rollers. If it is not, the paper will not feed
properly.
6.2 / SheetFeeder
rev. Aug 87
ImageWriter II
o TROUBLESHOOTING THE SHEETFEEDER
Symptom
The only problem the SheetFeeder can have is partial or
no paper feeding. When it has this problem, the error
light will be lit on the ImageWriter II.
Procedure
To correct the paper-feeding problem, perform the steps
below in the order given. Test the SheetFeeder after
each step, and do all testing with a known-good
ImageWriter II.
1. Using a cotton swab dipped in alcohol, clean the
black-rubber feed rollers mounted on the two roller
shafts on the SheetFeeder.
2. Replace the PCB assembly in the SheetFeeder.
3. Replace the frame assembly in the SheetFeeder.
Testing
To test the SheetFeeder:
1. Turn on the ImageWriter II. Make sure the select light
is off.
2. Press the form-feed button. A single sheet of paper
will load under the print mechanism. The select light
should now be on.
3. Power off the printer.
4. Run the ImageWriter II self-test (see Section 1,
Basics).
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 3
o TAKE-APART
Materials Required
Medium Phillips screwdriver
Small Phillips screwdriver
Small flathead screwdriver
Long, thin needlenose pliers
Set of jeweler's screwdrivers
Housing and
Paper Tray
To separate the housing and the paper tray:
1. Remove the two plasticized wire paper-support rods
(one from the SheetFeeder and one from the paper
tray) by pulling the rods straight out of their holes. (For
the location of the rods, refer to the SheetFeeder
Illustrated Parts List.) Keep the customer's rods to put
on the replacement housing and/or paper tray.
2. Unplug the connector (Figure 1, #1).
3. Remove the two screws (Figure 1, #2) that hold the
connector plate and mounting springs.
4. Remove the two screws (Figure 1, #3) from the metal
clamps that hold the rear housing. Remove the rear
housing.
5. Remove the paper guide springs (Figure 1, #4).
6. Remove the paper guide (Figure 1, #5).
7. Remove the two pivot pins. One is on the left and one
is on the right side of the SheetFeeder (Figure 1, #6,
shows the left side).
8. Use a small flathead screwdriver to gently pry the two
pivot shafts out. One is on the left and one is on the
right side of the SheetFeeder (Figure 1, #6, shows the
left side).
9. Lift the plastic paper tray hinge (Figure 1, #6) away
from both sides. Do not attempt to separate the
housing from the paper tray until after the next step.
10. Lay the SheetFeeder right-side down. Locate and
remove the spring (Figure 1, #7) on the left side of the
SheetFeeder.
11. Slide up the paper tray detent plate (Figure 1, #8) to
free it from the frame. Gently pry the plate loose.
12. Separate the housing and the paper tray assembly.
6.4 / SheetFeeder
rev. Mar 88
ImageWriter II
To connect the housing and paper tray:
1. Position the paper tray on the housing. Put the paper
tray detent plate (Figure 1, #8) into the circular
opening in the frame. Slide the plate down into
position.
2. Replace the spring (Figure 1, #7) on the left side of the
SheetFeeder.
2
5
3
1
4
6
7
MAIN FRAME
PIVOT
SHAFT
PIVOT
PIN
PAPER TRAY
HINGE
FREE
8
8
7
FIGURE 1
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 5
3. Line up the plastic hinges on both sides. Slide them
into position. (Figure 2, #1 shows the left side.)
4. Use a pair of long, thin needlenose pliers to replace
the pivot shaft (Figure 2, #1) on the left
side. Slide the pivot pin onto the shaft (Figure 2, #1).
Repeat this step for the right side.
5. Replace the paper guide (Figure 2, #2).
6. Replace the paper guide springs (Figure 2, #3).
7. Position the rear housing and the metal clamps
(Figure 2, #4), and replace the two screws.
Be sure the connector cable is in position.
8. Position the connector plate with the two springs
underneath, and replace the two screws
(Figure 2, #5).
9. Plug in the connector (Figure 2, #6).
10. Replace the customer's two plasticized wire paper support rods by sliding them into their holes on the
SheetFeeder housing and on the paper tray
assembly. (For correct orientation of the rods, refer to
the SheetFeeder Illustrated Parts List.)
5
2
4
6
3
1
MAIN FRAME
PIVOT
SHAFT
PIVOT
PIN
PAPER TRAY
HINGE
FIGURE 2
6.6 / SheetFeeder
rev. Mar 88
ImageWriter II
Frame Assembly
To remove the frame assembly:
1. Separate the housing assembly and the paper tray
assembly.
2. Remove the two screws (Figure 3, #1) that hold the
frame assembly together.
3. Remove the grounding screw (Figure 3, #2) attached
to the frame assembly.
4. Remove the lever lock (Figure 3, #3) attached to the
spring.
5. Remove the connector (Figure 3, #4) that runs from
the PCB to the stepper motor.
3
4
2
5
1
FIGURE 3
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 7
6. Remove the paper guide (Figure 4, #5), which is
snapped into place.
7. Lift the entire metal frame assembly off of the plastic
housing (see shaded area in Figure 4, #5).
3
4
2
5
1
ROLLER SHAFT WITH RUBBER ROLLERS
PAPER GUIDE
FIGURE 4
6.8 / SheetFeeder
rev. Aug 87
ImageWriter II
To replace the frame assembly:
1. Position the metal frame assembly on the plastic
housing. Line up the screw holes, and be sure the
paper release button is inserted in the back of the
plastic housing. Replace the two screws
(Figure 4,
#1).
2. Position the paper guide (Figure 4, #5) and snap it
into position.
3. Plug in the connector (Figure 4, #4).
4. Replace the lever lock and attach the armed end to
the spring (Figure 4, #3).
5. Replace the grounding strap and screw
#2).
(Figure 4,
6. Reconnect the housing assembly and paper tray
assembly.
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 9
PCB Assembly
and Housing
Assembly
To remove the PCB assembly and housing
assembly:
1. Separate the paper tray assembly and the housing
assembly, and remove the frame assembly .
2. Remove the metal spring plate, which holds the sheet
adjuster in place, by squeezing the three tabs (Figure
5, #1) together with a pair of needlenose pliers.
3. Disconnect the spring (Figure 5, #2) that holds the
paper stopper in place.
4. Remove the e-ring (Figure 5, #3) from the pointed end
of the spring plate shaft.
3
1
2
FIGURE 5
5. Set the housing assembly on its side, squeeze the
three tabs again (Figure 5, #1), and push them
through the openings in the housing. Turn the
housing over and remove the plastic spring plate with
the attached pieces (Figure 6).
SPRING
PLATE
PAPER
STOPPER
SHEET
ADJUSTER
FIGURE 6
6.10 / SheetFeeder
rev. Aug 87
ImageWriter II
6. Note the position of the PCB assembly. Then remove
it by gently prying back the two retaining tabs (Figure
7, #1).
1
FIGURE 7
To replace the PCB and housing assemblies:
1. Position the PCB assembly and snap it under the two
retaining tabs (Figure 7, #1).
2. Position the plastic spring plate and the attached
pieces so that the tabs line up (Figure 5, #1). Snap
the plate into position and hold it there.
3. Insert the pointed end of the spring plate shaft through
the housing, and attach the e-ring (Figure 5, #3).
4. Position the metal spring plate and snap it into place
over the tabs (Figure 5, #1).
5. Connect the spring (Figure 5, #2) that holds the paper
stopper in place.
6. Replace the frame assembly and connect the paper
tray assembly and the housing assembly.
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 11
Paper Tray
Assembly
The purpose of this procedure is to remove the
customer's paper tray assembly and then to remove from
it the parts that are not included in the exchange
assembly.
IMPORTANT : Do not discard the parts you remove
from the paper tray assembly. They will be needed for
the paper tray assembly exchange module.
NOISE PLATE SPRING
PAPER TRAY DETENT SHAFT
PAPER TRAY DETENT PLATE
2
1
3
ROLLER
GEAR
TAB 1
4
TAB 1
ROLLER
SPRING
TAB 2
IDLER GEAR
ROLLER
SPRING
TAB 2
LEFT ROLLER
HOLDER
RIGHT ROLLER
HOLDER
FIGURE 8
6.12 / SheetFeeder
rev. Aug 87
ImageWriter II
To remove the paper tray assembly:
1. Separate the paper tray assembly from the housing
assembly.
2. Position the paper tray as shown in Figure 8, the main
drawing. Pry off the paper tray locks (Figure 8, #1).
Using a small flathead screwdriver, pry off the upper
paper tray (the hinges are part of the upper paper
tray). The tray snaps onto the tabs. Some of the tabs
may break off as you remove it.
3. Locate the paper tray detent plate on the left side
(Figure 8, #2). Remove the paper tray detent shaft. Lift
the paper tray detent plate off the lower paper tray.
Set the parts aside for later use.
4. Gently pull the idler gear, on the left side of the tray,
toward you to release tab 1. At the same time, insert a
jeweler's screwdriver under tab 2, and slide the left
roller holder free of the tabs (Figure 8, #3).
5. Using a jeweler's screwdriver, gently pry loose tab 1
on the right side of the tray. Pry loose tab 2 and lift the
right roller holder free (Figure 8, #4).
6. Remove the entire assembly from the lower paper
tray.
7. Remove the roller springs (Figure 8, #3 and #4) from
both sides of the assembly. The springs hold the
roller shaft and the eject shaft in place.
8. For later use, set aside the left and right roller holders,
and the one roller shaft still connected to the small
gear.
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 13
To replace the paper tray assembly:
1. Locate the left and right roller holder and roller shaft.
Position the roller shaft with the eject roller so that the
black rubber feeder on the customer's roller shaft lines
up with the middle section of the eject roller (Figure 9,
#1). Place one side in the left roller holder and
connect the spring (Figure 9, #2). Repeat this on the
right roller holder.
ROLLER SHAFT
ROLLER SHAFT WITH EJECT SHAFT
NOISE PLATE SPRING
PAPER TRAY DETENT SHAFT
PAPER TRAY DETENT PLATE
1
4
3
2
6
5
LEFT ROLLER
HOLDER
TAB 1
TAB 1
ROLLER
SPRING
TAB 2
ROLLER
SPRING
TAB 2
RIGHT ROLLER
HOLDER
FIGURE 9
6.14 / SheetFeeder
rev. Aug 87
ImageWriter II
2. Position the lower paper tray so it is facing you. Place
the roller assembly into position (the white eject shaft
should be on the bottom). Snap the roller assembly
into position by lining up the four tabs (two on each
side) and snap it into position (Figure 9, #2 and #3).
3. Locate the paper tray detent plate. Position the plate
on the left side (Figure 9, #4). Insert the paper tray
detent shaft.
4. Position the upper paper tray on the lower paper tray.
Be sure the two tabs located at the front slide into the
lower half (Figure 9, #5). Snap the tray into position.
5. Reconnect the paper tray locks (Figure 9, #6).
6. Connect the paper tray assembly to the housing
assembly.
ImageWriter II
rev. Aug 87
SheetFeeder / 6. 15