MAINTENANCE MANUAL

W20 INDICATOR SERIES

CONTENTS

1. INTRODUCTION

2. SPECIFICATIONS

2.1 SYSTEM BLOCK DIAGRAM

2.2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION

2.3 GENERAL SPECIFICATIONS

2.4 OPTIONAL INTERFACE

2.5 LOAD CELL CONNECTION

3. INITIAL SETUP

3.1 INTERNAL FUNCTIONS AND SETTING METHODS

4. TROUBLE SHOOTING

4.1 TROUBLE SHOOTING LOOP

4.2 PARTS AND COMPONENTS TROUBLE SHOOTING

5. ELECTRICAL CIRCUITRY

5.1 SCHEMATICS

5.2 PCB LAYOUT

6. BILL OF MATERIAL

7. APPENDIX

Jan 2005 REV 1

Specifications and Function Subject to Change without Notice

1

1. INTRODUCTION

This maintenance manual contains of certain information that may result in fraudulent use. Do not release any part of this manual to any end users or un-authorized persons.

Built-in Pass Word configuration to prevent un-authorized settings or alternations.

After servicing, it is necessary to go through all tests and procedures to ensure the scale meets all the meteorological and approval requirements.

Here are some features of the W20 series

1. Zero indicator

2. Tare indicator

3. Negative value indicator

4. Subtractive tare function

5. Power on zero function

6. Manual zero function

7. 5 1/2 x 25mm wide angle LCD digits

8. Dual power: - By built-in rechargeable battery and external AC/DC power adaptor

9. Low battery warning signal

10. Dual color charge status indicator

11. Full digital Calibration

12. AC/DC power adaptor, Desk-top stand and dust cover included

13. Pass word configuration / parameter setting protection

14. User Programmable display resolution( up to 1/30000 )

15. Built-in EL backlight

16. Equipped with RS232 interface

17. Optional printer & external display(OP5) interface

2

2. SPECIFICATION

2.1 SYSTEM BLOCK DIAGRAM

LCD

LCD DRIVER

E+

LOAD E-

CELL S+

S-

A/D UNIT

CPU with ROM

POWER SUPPLY:

1.

AC ADAPTOR

(9V/500mA)

2.

RECHARGEABLE

BATTERY (6V 4Ah)

KEYBOARD

( 8 KEYS)

INTERFACE

Description:

When an article is placed on the platter, the load of the article is applied to the load cell inside the scale.

The resistance to the excitation current in the strain gauge will then changed and the analog output signal varies.

It is amplified and digitized continuously by the A/D converter into a digital signal. Subsequently, the resulting count is processed and managed by the CPU.

The CPU refers to the instructions from the keyboard, and then conveys the output data to LCD driver, which formats the data into readout on the display panels.

3

2.2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION

DC JACK

D-SUB 9

(FEMALE)

LOAD CELL

W20-50-X

J1

E-

E+

S-

S+

A/D BOARD

5 PIN

CONNECTOR

RECHARGEABLE

BATTERY

6V 4Ah

D-SUB 25

(FEMALE)

4 PIN CONNECTOR

(MALE)

J1

PRINTER

J7

OP5

W10-10-X

J2

RS232

LCD

J5

-

BAT

+

J6

A/D

MODULE

J1

AC IN

MAIN BOARD

4

2.3 GENERAL SPECIFICATIONS

2.3.1 Overall View

5

2.3.2 Overall Dimension:

250(W) X 180(D) X 170(H)mm Max.

2.3.3 Technical Specifications

PERFORMANCE

Display 5

1

/

2 digit LCD , 50 m/m height

Display resolution up to 30,000 divisions , minimum of 0.1

μV / div.

Count-by

Display speed

Zero adjustment

1 , 2 , 5 , 10 , 20 , 50

25 times / second

－2mV to 20mV

Span adjustment 0.6 mV/V to 4mV/V full scale

Zero

＜0.3μV / ℃

Span

＜8ppm / ℃

Stability / Drift

Operating environment

Linearity

＜0.0033％ R.O.

Noise

＜0.05μVp-p

Temperature 0

℃～40℃（32℉～104℉）

Humidity

＜90 ﹪non condensing

A/D CONVERTER

Type

24 bit Sigma

－Delta

Resolution

Conversion rate

LOAD CELL

Up to 1,000,000 internal counts

50 times/second

Excitation

5 volts for up to 8

×350Ω load cell

Load cell connection 4 Wires

（E

＋

, E

－

, S

＋

, S

－

）

INTERFACE

RS-232C

Printer

OP-05

Baud rate , transmission mode selectable

Centronics type

External display

POWER SUPPLY

AC Adaptor 9V / 500 mA

Rechargeable battery 6V , 4Ah

Power Consumption Normal = 0.1W

Charging = 5W

2.3.4 Main Components Used

Microprocessors: 89C52

Crystal Oscillator: 6MHz

Display Device: WTN Liquid Crystal Display

A/D converter

： AD7730

6

LCD driver IC

： uPD7225

2.4 OPTIONAL INTERFACE

2.4.1 Serial RS-232C Port (D-SUB 9 pin)

PIN ASSIGNMENT

PIN NUMBER

1

2

3

4

5

6

7

8

ASSIGNMENT

DCD

TXD

RXD

DTR

GND

DSR

RTS

CTS

Short-circuited internally

1

0

LSB

0 1 2 3 4 5 6 7

MSB

Data bits Stop bit (1)

Parity bit Start bit (0)

Type

：EIA-RS-232C

Method

：Half-duplex, asynchronous transmission

Format

：

Baud rate

：300,600,1200,2400,4800,9600 or 19200

Data bit

：7 or 8

Parity bit

：Even or None

Stop bit

：1

Code

：ASCII

Transmission mode

：

1. KPC(KEYBOARD PRINT CONTROL)

7

2. AUTO(AUTO PRINT PER WEIGHING EVENT,RESET

BY RETURN TO ZERO BAND,<100 div.)

3. SM(STREAM MODE,CONTINUOUS TRANSMISSION)

4. CMD(COMMAND MODE)

(REFER TO 3.1.1 Setting Basic Parameters)

Command Mode Transmission

： (READ)(CR)(LF)----ASCII CODE

PC



R

52H

E A D CR LF

45H 41H 44H 0DH 0AH

Indicator



，

HE ADER 1 HEADER 2

，

……

WEIGHT DATA(8 DIGITS)

，

UNIT

CR LF

Data Format

：

Format1

， ，

……

，

CR LF

HEADER 1

Format2

HEADER 2 WEIGHT DATA(8 DIGITS) UNIT

， ，

……

HEADER 1

HEADER 1

OL

：Overload

ST

：Stable

US

：Unstable

HEADER 2

HEADER

NT

WEIGHT DATA(8 DIGITS)

2

：Net weight

GS

：Gross weight

UNIT

Unit kg

，lb，g，t

CR LF

8

2.4.2 Parallel Printer Interface (D-SUB 25 pin)

PIN ASSIGNMENT

PIN NUMBER

1

2

5

6

3

4

7

8

9

11

25

ASSIGNMENT

STROBE

D0

D1

D2

D3

D4

D5

D6

D7

BUSY

GND

2.4.3 External Display Interface (Circular connector 4 pin)

PIN ASSIGNMENT

PIN NUMBER

1

2

3

4

ASSIGNMENT

+5V

DATA

CLOCK

GND

9

2.4.4 Backlight Interface

Operation procedures

：

1. After power on, select backlight function by pressing and hold ZERO.

Bl.on1

 The backlight will be turned off when constant/zero weight is detected and remains stable for about 20/4 seconds.

Backlight will be automatically turned on again when a different weight is detected

Bl.on2

 The backlight will be always turned on.

Bl.oFF

 The backlight will be always turned off.

2. When the desired setting appears, release ZERO key.

3. The backlight function will be employed right away.

2.5 LOAD CELL CONNECTION (Circular connector 4 pin)

PIN ASSIGNMENT

PIN NUMBER

1

2

3

4

ASSIGNMENT

EXC+

EXC-

SIG+

SIG-

Pin 5 is ground.

10

3. INITIAL SETUP

3.1 INTERNAL FUNCTIONS AND SETTING METHODS

INTERNAL FUNCTION FLOW CHART

*1

0-PAS 00000

1-PAr

Prnt

0.r.

0.tr.

Frmt Ut.

trA?

mo.t

mo.d

modE bt.

2-CAP

*2

3-CAL

FS.

cAL.-0

Ct.

LoAd dP.

00000

4-Pin

NOTE

：

* 1. When password function disable, this selection will not appear.

* 2. If indicator is protected by password, enter correct password in order to access menu 3 & 4 .

11

HOW TO ENTER THE REQUIRED FUNCTION AND PARAMETER SETTING

a. Turn indicator off.

b. Power on indicator.

c. Press M+(SET) while ‘W10’ symbol appears.

d. Indicator displays internal A/D counts.

e. Press M+(SET) again.

f. Select desired menu to access by Pressing ZERO.

g. Enter Sub-menu by Pressing M+(SET).

h. Quit the function setting by pressing MC(ESC).

3.1.1 Setting Basic Parameters

【SET】

1-PAr 0.r.

0.tr.

trA?

mo.t

mo.d

Prnt Frmt Ut.

modE bt.

SYMBOL/DEFINITION SETTINGS

0.r.

(ZERO RANGE)

0 = 0% OF RATED CAPACITY

2 = 2% OF RATED CAPACITY

4 = 4% OF RATED CAPACITY

10 = 10% OF RATED CAPACITY(DEFAULT)

20 = 20% OF RATED CAPACITY

100 = 100% OF RATED CAPACITY

O.tr.

(AUTO ZERO TRACKING RANGE)

0.0 = DISABLE

3.2 = 1.5 DIV./1 SEC.(DEFAULT)

5.4 = 2.5 DIV./2 SEC.

----i.e. O.tr.n.m

division=n x 0.5d

time interval=m x 0.5s

-----

-----

-----

-----

----trA?

9.9 = 4.5 DIV./4.5 SEC.

0 = DISABLE

(ZERO TRACKING ANYWHERE) 1 = ENABLE(DEFAULT)

12

SYMBOL/DEFINITION

mo.t

(MOTION TRACKING TIME

INTERVAL) mo.d

(MOTION DETECTION DIVISION

RANGE) bt.

(BAUD RATE) modE

(COMMUNICATION MODE)

Ut.

(WEIGHT UNIT)

SETTINGS

0.1 = 0.1 SECOND

0.2 = 0.2 SECOND

0.3 = 0.3 SECOND

---

1.0 = 1 SECOND (DEFAULT)

---

9.7 = 9.7 SECOND

9.8 = 9.8 SECOND

9.9 = 9.9 SECOND (MAXIMUM)

0.1 = 0.1 DIVISION

0.2 = 0.2 DIVISION

0.3 = 0.3 DIVISION

---

2.0 = 2.0 DIVISION (DEFAULT)

---

9.7 = 9.7 DIVISION

9.8 = 9.8 DIVISION

9.9 = 9.9 DIVISION (MAXIMUM)

0.3 = 300 BPS

0.6 = 600 BPS

1.2 = 1200 BPS

2.4 = 2400 BPS

4.8 = 4800 BPS

9.6 = 9600 BPS(DEFAULT)

19.2 = 19200 BPS

0 = KPC(KEYBOARD PRINT CONTROL, WEIGHT

DATA WILL BE SENT BY PRESSING

PRINT KEY)

1 = AUTO(AUTO PRINT WHEN CONSTANT WEIGHT

IS DETECTED PER WEIGHING EVENT)

2 = CMD(COMMAND RESPONSE MODE, INITIATE

DATA TRANSMISSION BY GIVING A

COMPUTER COMMAND)

3 = SM(STREAM MODE, CONTINUOUS

TRANSMISSION) (DEFAULT) lb = POUND t = METRIC TONNE(BLANK SPACE) g = GRAM kg = KILOGRAM(DEFAULT)

13

SYMBOL/DEFINITION

Frmt

(RS-232 FORMAT)

Prnt

1

(PRINTER CONTROL)

SETTINGS

1 = E,7,1

，FORMAT 1

2 = E,7,1

，FORMAT 2

8 = N,8,1

，FORMAT 1

9 = N,8,1

，FORMAT 2

0 = PRINT KEY HAS NO FUNCTION, M+ KEY CAN

PRINT.

PRESS MC TO PRINT ACCUMULATED

VALUE AND CLEAR IT FROM MEMORY AT THE SAME

TIME.

1 = PRINT KEY HAS FUNCTION, M+ KEY DOES

NOT PRINT.

P.S.EACH WEIGHING CAN PRINT ONCE, THE

WEIGHT SHOULD BE RETURN TO ZERO THEN WEIGH

AGAIN TO ATTAIN NEXT PRINT .

1

Prnt = 0

Press M+, weighing data is printed out as below

……….

， CR LF

SERIAL NO.

SPACE WEIGHT DATA(8 DIGITS)

Press MC, Accumulated value is printed out

……….

，

UNIT

CR LF

COUNT OF ACCUM.

SPACE WEIGHT DATA(8 DIGITS) UNIT

Prnt = 1

Press PRINT, weighing data is printed out as below

， ，

……

，

CR LF

HEADER 1 HEADER 2 WEIGHT DATA(8 DIGITS) UNIT

14

3.1.2 Setting Capacity And Division

2-CAP.

【SET】

FS.

Ct.

dP.

SYMBOL/DEFINITION

FS.

(FULL SCALE RANGE)

Ct.

(MINIMUM DIVISION)

SETTINGS

USER PROGRAMMABLE DISPLAY RESOLUTION,

MIN. DIV./FULL CAPACITY >= 1/30000

INCREASE/DECREASE/MOVE CURSER LEFT/MOVE

CURSER RIGHT BY PRESSING ZERO/TARE/

NET-GROSS/PRINT

DIV. COUNTS BY 1/2/5/10/20/50.

1 2 5 10 20 50

SELECT DIV. BY PRESSING ZERO OR TARE

0 0.0

0.00

0.000

0.0000

dP.

(POSITION OF DECIMAL POINT)

SELECT POSITION OF DECIMAL POINT BY

PRESSING ZERO OR TARE

15

3.1.3 Calibration Procedures

3-CAL

【SET】 【SET】 cAL.-0 LoAd 00000

STEP DISPLAY

1. Remove all loads form platform and wait until the MOTION INDICATOR goes off.

2. Press SET.

3. Indicator displays caL.-0

4. Wait until MOTION INDICATOR goes off.

5. Press SET.

6. Indicator displays … then LoAd

7. Indicator display 00000

3-CAL cAL.-0

LoAd

8. Place a constant load with known weight value

(the heavier the better) onto the platform.

9. Enter the weight of load applied by means of the ZERO, TARE, GROSS/NET and PRINT key.

10.Wait until MOTION INDICATOR goes off.

11.Press SET TO CONFIRM ENTRY.

12.Indicator displays … and then 4- Pin for

PASSWORD SETUP or press ESC to quit and return to normal operation status.

13.If any caution appears, please find paragraph of ERROR CODES AND DESCRIPTION to do further check.

00000

. . . . . .

4-Pin

16

3.1.4 PASSWORD SETUP PROCEDURES

STEP

1. If calibration procedures is completed, indicator will display 4-Pin.

2. Press SET.

3. Indicator displays 00000

4. Enter the desired password by means of the ZERO, TARE, GROSS/NET and PRINT key.

5. Password setup is completed and return to

Normal operation status.

DISPLAY

4-Pin

00000 xxxxx

NOTE

：

1. If password is set as 00000, then it has no access restrictions to any selections. The 0-PAS selection will not appear on menu.

2. In case password is forgotten, contact your local agent or send unit back to manufacturer for assistance.

3. Under password protection mode (when password is not 00000), enter the password to access to menu 3&4. Otherwise, only menu 0, 1,

2 can be accessed.

17

3.1.5 ERROR CODES AND DESCRIPTION

ZERO CALIBRATION

ERROR CODE

AAAAA

UUUUU

DESCRIPTION

1. Poor connection

---To check the connector

2. Wrong connection

---To check the Load Cell connector to see if the parity of signal is reversed.

3. The input offset voltage signal is too low.

---To disconnect the power and insert a resistor around 100K~500Kohm between EXC+ and SIG+ terminals of Load Cell connector

4. Load Cells were damaged.

---To replace with new Load Cells.

1. Poor or Wrong connection

---To check the connector

2. The input offset voltage signal is too high(over

30mV)

---The Load Cell capacity is too small or it is even dead. Change new Load Cell with bigger capacity.

3. Load Cells were damaged

---To replace with new Load Cells

4. Thunderstorm damage

---To contact your local agent for assistance

SPAN CALIBRATION

ERROR CODE

LLLLL

CCCCC

-----

DESCRIPTION

The input signal becomes lower.

---Check the Load Cell connector to see if the parity of signal is reversed.

---The platform device has been disturbed.

The value of span is too small.

---Choose the proper value of span not less than

100 div.

The output signal of Load Cell is inadequate for span calibration.

---To decrease the display resolution

---To change Load Cells with higher output signal

18

UUUUU

1. The input signal is too high(over 30mV)

---Replace new Load Cells with bigger capacity

2. Load Cells were damaged

---To replace with new Load Cells

3. Poor connection

---To check the connector

19

4. TROUBLE SHOOTING

4.1 TROUBLE SHOOTING LOOP

POWER ON

NO DISPLAY

CHECK POWER SUPPLY,

CPU,LCD,KEYBOARD

GHOST

CHECK POWER

SUPPLY,LCD,LCD

DRIVER IC,R10~13

INCORRECT

RE-CALIBRATE

THE INDICATOR

DISPLAY RANDOM

FIGURE

SELF-TEST?

OK

CHECK CPU,LCD,

LCD DRIVER IC

CHECK SEGMENTS

THEN ZERO?

SOME SEGMENTS DISAPPEAR

OK

CHECK LCD,

CONNECTORS,LCD DRIVER

IC

PROPER READOUT?

UNSTABLE

CHECK STRUCTURE OF

PLATFORM ,LOAD

CELL,A/D UNIT,

BAD SOLDERING

OK

CORRECT READOUT?

OK

CAN’T REACH THE FULL

CAPACITY

CHECK STRUCTURE OF

PLATFORM,LOAD

CELL,OFFSET

VALUE

NORMAL OPERATION

20

4.2 PARTS AND COMPONENTS TROUBLE SHOOTING

4.2.1 Power Supply Checking

4.2.1.1 Relevant parts:

Main Board (W10-10-X)

Q8 (C1061)

ZD1 (8.2V)

BR1 (W04/1A)

Q4 (A1515)

Q6 (C945)

R26 (1.2 ohm, 1/2W)

U9 (IC 4027)

U8 (HT-7039)

U7(AIC 1722-50)

U6(2930-5V)

DC JACK(SCD-021)

Description:

1) AC Adaptor: This AC Adaptor provides power for DC9~12V,500mA

2) Battery: Built-in Rechargeable Battery 6V/4Ah

21

3) How Battery is charged completely?

The charging voltage is regulated by Q8 (C1061) and ZD1 (8.2V) for about 7 volts.

The charging current will go down automatically when voltage reached.

Q6 (C945) and R26 (1.2R, 1/2W) provide Over-Current protection.

4) +5VA power drives analog system including A/D converter device

(IC 7730).

U6 (2930-5V) is a 5volts Voltage Regulator.

5) +5V power drives digital circuit systems.

U7 (AIC 1722-50) is a 5volts Voltage Regulator.

6) Auto-off:

If the indicator is under LO-BAT situation, after fixed minutes

CPU will launch a low-to-high pulse to trigger the U9(IC 4027), then Q4 cuts off, the indicator will be shut down immediately.

7) Low Power Detection:

The U8 (HT-7039) is designed to detect the power level. When battery voltage is less than 5.5V, it will release a low potential signal to CPU, and then CPU will instruct LCD display to show LO-BAT symbol.

4.2.1.2 Input voltage: 5.5V or higher

Check and recharge battery if voltage less than 5.5V.

Check DC-JACK or AC Adaptor if been defective.

4.2.1.3 System voltage (Vcc): 5V +/- 10%

Check that the system voltage is within 5V +/- 10% a) less than 4.5V, the CPU may not work properly.

b) more than 6V, ghost will appear on LCD.

4.2.2 Platform Structure Checking

The platter device shall not touch anything around itself during operation. Check that the platter is not contacted with the upper

(no load) and/or lower (with load) stopper if equipped.

4.2.3 LCD Display Checking

4.2.3.1 Check that it is soldered and connected properly between LCD and driver IC (uPD7225), driver IC (uPD7225) and CPU.

4.2.3.2 Check whether LCD is broken.

22

4.2.4 CPU Checking

4.2.4.1 Check that all pins are seated properly into the socket.

4.2.4.2 Check that the Crystal Oscillator works.

4.2.4.3 Check the RESET is normally low.

4.2.5 A/D Unit Checking

4.2.5.1 Check that the +5VA power is correctly fed to the

A/D unit.

4.2.5.2 Check that the signal output of loadcell is adequate.

4.2.5.3 Check OP. amplifiers & A/D converter (AD7730).

When no error is found with the above checking procedures, the trouble can be caused by the load cell or the PCB itself. Replace a new one could be better to identify the defectiveness.

In this way, the readout of weight would be varied because of the output voltage of loadcell and different span value, so re-calibration is necessary after this replacement.

23

5. ELECTRICAL CIRCUITRY

5.1 SCHEMATICS

24

25

26

5.2 PCB LAYOUT

W10-10-4 TOP LAYER

W10-10-4 BOTTOM LAYER

27

W10-10-4 TOP OVERLAY

W20-50-2 TOP LAYER W20-50-2 BOTTOM LAYER

W20-50-2 TOP OVERLAY

28

6. BILL OF MATERIAL

STRUCTURE

Parts No.

A0905600401

A0905600400

A0906000210

A1204040250

A1208020351

A1600060400

A60********

C1W10010000

C1W10000000

E9W10000010

E9W20000050

F0007NBS102

G0001705200

G0001OFW000

G0003PSP000

G0030000801

G0005NBS000

F0007PSP001

G0004DW0001

Description

CONNECTOR

CONNECTOR

D.C. JACK

WIRE ARRAY

BATTERY WIRE ARRAY

RECHARGEABLE BATTERY

ADAPTOR

PANEL OVERLAY

Specification

PLT-164-P

PLT-164-R

Qty Remark

1

1

SCD-021

4 PIN 25cm

1

1

2 PIN 35cm(SINGLE HOUSING) 1

GP4-6/6V 4Ah 1

***V/9V 500mA

W10 SERIES

1

1

PANEL PC

P.C.B.

P.C.B.

S/S BATTERY CLAMP

W10 SERIES,200x78x2

㎜

1

W10-10-X

W20-50-X

NBS SERIES

INDICATOR HOUSING(UPPER) 1705L SERIES

INDICATOR HOUSING(UNDER) OFW SERIES

1

1

1

1

1

INDICATOR FIX PLATE

ADJUSTABLE FEET

RUBBER WASHER

STEEL FIX PLATE

RUBBER PAD

PSP/OFW SEIES, U SHAPE 1

OFW SERIES, 5/16-24UNFx20L 2 INDICATOR

ψ27xψ9x3mm

PSP/OFW SEIES

ψ16x3.5t, AR-167

2

1

4 DW SERIES

W10-10-X MAINBOARD

E0W10000010

A0202093461

A0204074042

P.C.B.

I.C.

I.C.

A0205040270

A02070*****

A0207017220

A0208072250

A0203002322

A0250070390

A0300000040

A0201089521

A0102000289

A0401007330

A0401009450

A0401010610

A0401015150

A0501004148

A0502000001

A0503020082

A0701106017

I.C.

VOLTAGE REGULATOR I.C.

VOLTAGE REGULATOR I.C.

I.C.

I.C.

I.C.

I.C. SOCKET

I.C.

L.C.D

TRANSISTOR

TRANSISTOR

TRANSISTOR

TRANSISTOR

DIODE

BRIDGE RECTIFIER

ZENER DIODE

CAPACITOR (EC)

W10-10-X

93C46

74HC04

4027

2950-50

AIC-1722-50CZL

UPD7225

MAX232CPE

HT7039A

40 PIN

89C52

LCD/G289

2SA733

2SC945

H1061C OR D880

A1515

1N4148

W04(1A)

1/2W 8V2(9A3)

10uF/16V

（SS TYPE）

A0701108016

A0701220017

A0701477017

CAPACITOR (EC)

CAPACITOR (EC)

CAPACITOR (EC)

1000uF/16V

220uF/16V(SS TYPE)

470uF/16V(SS TYPE)

1

1 U2

1 U11

(OP-5 OPTION)

1 U9

1 U11

1 U7

1 U3

1 U10

1 U8

1 U1

1 U1

1 LCD1

2 Q2,Q7

2 Q1,Q6

1 Q8

1 Q4

7 D1-6,D9

1 BR1

1 ZD1

8 EC1-4,

EC8-9,

EC11-12

1 C12

1 EC13

1 EC10

29

A0702105035

A0730104050

A0740020050

A0740101050

A0802047309

A0804042702

A0805020120

A0805021101

A0805041102

A0805041103

A0805041104

A0805041105

A0805041153

A0805041180

A0805041183

A0805041205

A0805041221

A0805041203

A0805041223

A0805041273

A0805041334

A0805041471

A0805041472

A0625050000

A0901010040

A0901010060

A0902010020

1100211059

A1202060301

A0904120090

A1306000003

A1400000006

A1401005120

A1500000004

A5004000003

CAPACITOR (TC)

CAPACITOR (MLC)

CAPACITOR (CC)

CAPACITOR (CC)

RESISTOR NETWORK

METAL FILM RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

1uF/35V

104Z

20pF

100pF(101)

47K

Ω

9 PIN

27K

Ω

1.2

Ω

100

Ω

1K

Ω

1/4W

1/2W

1/2W

1/4W

4 EC5-7,EC14

16 C3,4,6-11,

2

5

1

1

1

1

3

13-19,29

C1-2

C24-28

NR1

R23

R26

R25

R1,R7,R18

CARBON FILE RESISTOR 10K

Ω

1/4W 6 R2,R10-R12,

R22,R32

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

100K

Ω

1/4W

1M

Ω

15K

Ω

1/4W

1/4W

18

Ω

18K

Ω

2M

Ω

220

Ω

1/4W

1/4W

1/4W

1/4W

1

2

1

1

1

1

1

R37

R19,R21

R27

R8

R13

R20

R28

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

CARBON FILE RESISTOR

20K

Ω

22K

Ω

1/4W

1/4W

27K

Ω

1/4W

330K

Ω

1/4W

1

2

1

1

R43

R5-6

R23

R9

CARBON FILE RESISTOR

CARBON FILE RESISTOR

470

Ω

1/4W

4.7K

Ω

1/4W

1

3

R29

R4,R14,R33

L.E.D.

CONNECTOR

CONNECTOR

CONNECTOR

ROUND,5mm,(RED,GREEN) 1 LED1

4 PIN WAFER 1 J7(OP-5)

6 PIN WAFFER 1 J2

2 PIN WAFER,PITCH=3.9mm 2 J4-5

CRYSTAL 11.0952MHZ

WIRE ARRAY(SINGLE HOUSING) 6PIN 30cm

CONNECTOR

TACT SW.

D-SUB 9PIN(FEMALE)

KPT-1104B

1

1

1

9

X1

RS-232

RS-232

SW1-9

BACK LIGHT

BACK LIGHT INVERTER

BUZZER

HEAT SINK

EL-13044 (134*44mm)

5V TO 120V

OBO-15210

MB-207-20

1 EL1

1 IN1

1 BZ1

1 Q8

W10-10-X MAINBOARD (PRINTER OPTION)

A0204743742

A0730104050

A0901010120

A1250251220

I.C.

CAPACITOR (MLC)

74HC374

104Z

CONNECTOR 12 PIN WAFFER

WIRE ARRAY(SINGLE HOUSING+DSUB 25PIN) 12PIN

1 U4

1 C5

1 J2

1 PRINTER

30

W20-50-X A/D BOARD

E0W20010000

A0203077300

A0206000072

A0702106010

A0710104101

A0710224101

A0720103101

A0730104050

P.C.B.

I.C.

I.C.

CAPACITOR (TC)

CAPACITOR (MEF)

CAPACITOR (MEF)

CAPACITOR (PEI)

CAPACITOR (MLC)

W20-50-X

AD7730BN

OP-177CP

10uF/16V

0.1uF/100V(104)

0.22uF/100V(224)

0.01uF/100V(103J)

104Z

1

1 U1

2 U2-3

3 EC1-3

2 C6-7

2 C8,C18

2 C5,C9

7 C3-4,

C10-11,

C15-17

2 C12-13

4

A0740020050

A0750122050

A0803041002

A0803043001

A0804041000

A0804044701

CAPACITOR (CC)

CAPACITOR (CCFT)

20pF

1200pF/50V

METAL FILM RESISTOR(10PPM) 10K

Ω

1/4W

METAL FILM RESISTOR(10PPM) 30K

Ω

1/4W

METAL FILM RESISTOR

METAL FILM RESISTOR

100

Ω

1/4W

4.7K

Ω

1/4W

1

2

2

2

R5

R3-4

R6-7

R1-2

A0805040105

A0901010060

A1005030512

A1007000001

A1100249152

A1202060301

F0015000004

F0015000005

CARBON FILE RESISTOR

CONNECTOR

FERRITE BEAD

FERRITE CORE

100K

Ω

1/4W

6 PIN WAFFER

3.5*6*0.8m

TR-16*9*28mm

CRYSTAL 4.9152MHZ

WIRE ARRAY(SINGLE HOUSING) 6PIN 30cm

A/D PROTECTION BOX

A/D PROTECTION BOX

EM SERIES

（UPPER）

EM SERIES

（UNDER）

2

1

1

1

1

R8-9

J2

9 L1-9

2

1 X1

==============================================================================

31

7. APPENDIX

PARTS EXPLOSION:

32

ITEM PART NO.

PART NAME SPECIFICATION

2

F0007PSP001 STEEL FIX PLATE PSP/OFW SEIES

4

G0004DW0001 RUBBER PAD

6

G0003PSP000 INDICATOR FIX PLATE

8

Z0014100620 S/S SCREW

10

G0005NBS000 RUBBER WASHER

ψ16x3.5t, AR-167

PSP/OFW SEIES, U SHAPE

M6*12

ψ27xψ9x3mm

12

G0001OFW000 INDICATOR HOUSING(UNDER) OFW SERIES

14

G0030000801 ADJUSTABLE FEET OFW SERIES, 5/16-24UNFx20L

16

D0BS0500001 NAME PLATE(PC)

18

A0904120090 CONNECTOR

20

A0904120251 CONNECTOR

22

SCREW

24

NUT

26

A0905600400 CONNECTOR

28

A1204040250 WIRE ARRAY

30

A0906000210 D.C. JACK

32

A1208020351 BATTERY WIRE ARRAY

34

E9W20000050 P.C.B.

BS,BW SERIES

D-SUB 9PIN(FEMALE)

D-SUB 25PIN(DSD TYPE)

1/8-40UNC

1/8-40UNC

PLT-164-R

4 PIN 25cm

SCD-021

2 PIN 35cm(SINGLE HOUSING)

W20-50-X

36

A1600060400 RECHARGEABLE BATTERY

38

F0007NBS102 S/S BATTERY CLAMP

40

Z0010001308 SCREW

42

E9W10000010 P.C.B.

GP4-6/6V 4Ah

NBS SERIES

M3*8 TAPPED

W10-10-X

46

G0001705200 INDICATOR HOUSING(UPPER) 1705L SERIES

52

C1W10000000 PANEL PC W10 SERIES,200x78x2

54

C1W10010000 PANEL OVERLAY W10 SERIES

㎜

QTY

1

1

1

1

1

2

1

1

1

1

1

1

1

2

1

2

4

1

2

1

4

1

1

4

33

34

35

36

37

38

39

40

41

42

43

44