Star NX-1500TM

DOT MATRIX PRINTER

NX-1500LC-15

TECHNICAL MANUAL

[ FIFTH EDITION ]

NOTICE• All rights reserved. Reproduction of any part of this manual in any

form whatsoever, without STAR’s express permission is forbid-den.

• The contents of this manual are subject to change without notice.• All efforts have been made to ensure the accuracy of the contents

of this manual at the time of going to press. However, should anyerrors be detected, STAR would greatly appreciate being in-formed of them.

• The above notwithstanding, STAR can assume no responsibilityfor any errors in this manual.

© Copyright 1996 Star Micronics Co.,Ltd.

INTRODUCTION

This manual describes dot matrix printers as shown below.It is intended for use as a reference for periodic inspections and maintenance procedures.This manual is prepared for use at a technical level and not for the general user.

Model Destination

NX-1500 MULTI-FONT For American and Asian market

LC-15 MULTI-FONT For European and Pacific market

• This manual is divided into the following sections:Chapter 1 General SpecificationsChapter 2 Theory of OperationChapter 3 AdjustmentsChapter 4 Parts ReplacementChapter 5 Maintenance and LubricationChapter 6 TroubleshootingChapter 7 Parts List

• First edition : Sep. 1989Second edition : Apr. 1991Third edition : Aug. 1993Fourth edition : Sep. 1995Fifth edition : Apr. 1996

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CHAPTER 1GENERAL SPECIFICATIONS

1. General Specifications ......................................................................................... 3

2. External Appearance and Composition .............................................................. 5

3. DIP Switch Settings .............................................................................................. 6

4. Parallel Interface ................................................................................................... 7

4-1. General Specifications ........................................................................................... 7

4-2. Connector Signals .................................................................................................. 7

5. Serial Interface (option) ........................................................................................ 8

5-1. General Specifications ........................................................................................... 8

5-2. Connector Signals .................................................................................................. 8

5-3. DIP Switch Settings ................................................................................................ 9

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GENERAL SPECIFICATIONS

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1. General Specifications

Print system Serial Impact Dot-matrix

Printing speed 150cps (Draft pica)37.5cps (NLQ pica)

Print direction Bidirectional, logic-seekingUnidirectional, logic-seeking (selectable)

Print Head 9 pins

Line spacing 1/6, 1/8, n/72, n/216 inches

Paper feed Standard: Friction and push tractorOption: Pull tractor

Paper feed speed 2.8 inches/second max.

Character setASCII 96Code table (International) 3 sets *1 (For NX-1500 SU, LC-15 SU)/14 sets *2 (Others)IBM special 111IBM block graphic 50Download 255

*1 IBM-Russian, Gost, Code page #866*2 USA, France, Germany, England, Denmark I, Sweden, Italy, Spain I, Japan, Norway, Denmark II, Spain II, Latin America,

Denmark/Norway

Number of columns CPI ColumnsPica 10 136Elite 12 163Condensed pica 17.1 233Condensed elite 20 272Proportional Variable

Character dot matrix 9 × 11 (Draft)18 × 23 (NLQ)

Bit image dot-matrix DPI8-pin single 60 8× 8168-pin double 120 8× 16328-pin high-speed double* 120 8× 16328-pin quadruple 240 8× 32648-pin CRT I 80 8 × 10888-pin CRT II 90 8 × 12248-pin plotter 72 8 × 9768-pin double-plotter 144 8× 19589-pin single 60 9× 8169-pin double 120 9× 1632

* It is impossible to print adjacent dots in the modes marked with an asterisk (*).

Paper widthCut sheet 6" ~ 16.5"Fanfold(continuous) 4" ~ 16"

Copies Original + 2 copies

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Maximum buffer sizeWithout Download 15KBWith Download 1 line

Emulations Epson modeIBM proprinter mode

Interface Standard: Centronics parallelOption: RS-232C serial

Ribbon type On-carriage, dedicatedBlack

Ribbon life 3 million characters (draft pica)

Dimensions 590(w) × 332(d) × 127(h)mm23.2(w) × 13.1(d) × 5(h)in

Weight 8.5 kg (18.7 lb)

Power supply 120VAC, 220VAC, 240VAC, 50/60Hz(varies according to the country of purchase)

Options Automatic sheet feederSerial interface board(RS-232C)Pull tractor feed

Fig. 1-1 External dimensions

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2. External Appearance and Composition

Fig. 1-2 Front View of the Printer

Fig. 1-3 Diagram of Internal Composition

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3. DIP Switch Settings

3-1. For NX-1500 SU, LC-15 SU

Switch Function ON OFF

1-1 Page length 11 inches 12 inches

1-2 Auto CR Yes No

1-3 Character Set Gost Other (See 2-4)

1-4 Auto sheet feeder Inactive Active

1-5 Paper-out detector Enabled Disabled

1-6 Emulation mode Standard IBM

1-7 Character set Set #1 Set #2

1-8 Auto LF No Yes

2-1 Usage of RAM Buffer Download

2-2 Italic OFF ON

2-3 ESC 4/ESC 5 (*1) Italic MSB

2-4 IBM code page IBM-Russian #866

*1 The switch 2-3 is valid only in the standard emulation mode.

3-2. Others

Switch Function ON OFF

1-1 Page length 11 inches 12 inches

1-2 Auto CR Yes No

1-3 Printing area A type B type

1-4 Auto sheet feeder Inactive Active

1-5 Paper-out detector Enabled Disabled

1-6 Printer mode Standard IBM

Character set (Standard mode) Italics Graphics

Character set (IBM mode) Set #2 Set #1

1-8 Auto LF No Yes

2-1 Usage of RAM Buffer Download

2-2

2-3 International character set

2-4

International character sets:

Country 2-2 2-3 2-4 Country 2-2 2-3 2-4

U.S.A. ON ON ON Denmark I (*2) ON ON OFF

France OFF ON ON Sweden OFF ON OFF

Germany ON OFF ON Italy ON OFF OFF

England OFF OFF ON Spain I OFF OFF OFF

*2 Denmark/Norway when switch 1-6 is OFF and switch 1-7 is ON.

1-7

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4. Parallel Interface

4-1. General Specifications

Item Specifications

Synchronization System Via externally supplied STROBE pulses

I/F Protocol By ACK and BUSY signals

Logic Level Compatible with TTL level

Fig. 1-4 Timing Charts of Parallel Interface

4-2. Connector Signals

Pin No Signal Name Function Description1 STROBE Goes from high to low (for ≥ 0.5µs) when active

2 DATA0 High when active3 DATA1 High when active

4 DATA2 High when active



7 DATA5 High when active8 DATA6 High when active


10 ACK 9µs low pulse acknowledges receipt of data

11 BUSY Low when printer ready to receive data.12 PAPER High when paper out. Can be disabled with Memory Switch setting.

13 SELECT High when printer is on-line

14,15 NC Unused

16 SIGNAL GND Signal ground

17 CHASSIS GND Chassis ground (isolated from signal ground)18 +5V +5V DC output from printer

19 ~ 30 GND Twisted pair ground return

31 RESET When this input signal is low, printer is reset

32 ERROR Outputs low when printer cannot continue, due to an error33 EXT GND External ground

34,35 NC Unused

36 SELECT IN Always high

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5. Serial Interface (option)

5-1. General Specifications

Item Specifications

Interface RS-232C level

Synchronization System Asynchronous

Baud rate 150-19,200 bit per second (BPS) [selectable]150, 300, 600, 1200, 2400, 4800, 9600, 19200BPS

Word lengthStart bit: 1 bitData bit: 7 or 8 bits (selectable)Parity bit: Odd, Even or None (selectable)Stop bit: More then 1 bit length

Signal polarityMark: Logic “1” (–3V to –15V)Space: Logic “0” (+3V to +15V)

Handshaking DTRXON/XOFF

ETX/ACK

Data buffer 8KB (standard)

5-2. Connector Signal and Functional Descriptions

Pin No. Signal name Direction Function

1 GND — Printer’s chassis ground.

2 TXD OUT This pin carries data from the printer.

3 RXD IN This pin carries data to the printer.

4 RTS OUT Always space.

This pin is Space when the computer is ready to send data.

This printer does not check this pin.

6 NC Unused.

7 GND — Signal ground.

8-10 NC Unused.

This printer turns this pin Space when it is ready to receive data.

This line carries the same signal as pin 20.

12 NC Unused.

13 GND — Signal ground.

14-19 NC Unused.

20 DTR OUT The printer turns this pin Space when it is ready to receive data.

21-25 NC Unused.

5 CTS —

11 RCH OUT

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5-3. DIP Switch Settings

Switch ON OFF

1 8 data bits 7 data bits

2 No parity Parity checked

3

4

5 Odd parity Even parity

6

7 Data transfer rate — see table below

8All switches are set ON when the printer leaves the factory.

Protocol Switch 3 Switch 4

DTR mode ON ON

XON/XOFF mode ON OFF

ETX/ACK mode OFF ON

Baud rate Switch 6 Switch 7 Switch 8

150 OFF OFF OFF

300 OFF OFF ON

600 OFF ON OFF

1200 OFF ON ON

2400 ON OFF OFF

4800 ON OFF ON

9600 ON ON OFF

19200 ON ON ON

Handshaking protocols — see table below

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CHAPTER 2THEORY OF OPERATION

1. Block Diagram ..................................................................................................... 13

2. Main Logic Board ................................................................................................ 14

2-1. Data Input Operation............................................................................................. 14

2-1-1. Parallel Interface ............................................................................................... 14

2-1-2. Serial Interface .................................................................................................. 15

2-2. General Flow Chart ............................................................................................... 18

2-2-1. Editing ............................................................................................................... 19

2-2-2. Print Head Driving Circuit ................................................................................ 19

2-2-3. Print Head Temperature Detection Circuit ...................................................... 19

2-2-4. Carriage Motor Driving Circuit ......................................................................... 20

2-2-5. Carriage Motor Speed Control ......................................................................... 21

2-2-6. Paper Feed Motor Driving Circuit .................................................................... 21

2-3. Reset Circuit .......................................................................................................... 23

2-4. Reset by +5V Line Voltage Detection .................................................................. 24

2-5. Protection Circuit .................................................................................................. 24

3. Power Supply Unit .............................................................................................. 24

4. Mechanisms ......................................................................................................... 25

4-1. Print Head Mechanism.......................................................................................... 25

4-2. Print Head Carrying Mechanism .......................................................................... 25

4-3. Ink Ribbon Feed Mechanism................................................................................ 26

4-4. Paper Feed Mechanism ........................................................................................ 27

4-5. Detectors ............................................................................................................... 28

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THEORY OF OPERATION

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THEORY OF OPERATION

1. Block DiagramThe block diagram of this printer is shown in Fig. 2-1.

Fig. 2-1 Block Diagram(1) Main Logic Board

This board receives data from the host computer and stores it in the RAM in the order of arrival. The CPU on thisboard reads the data from the RAM, and edits it according to the program stored in the ROM.When the editing is completed, various drive signals from the CPU are sent to the printer mechanism to performprinting.<Explanation>1 CPU M50734SP

• Controls this printer.2 EPROM 27512×1 64K-bytes, 27256×1 32K-bytes

• Contains the program which executes control of the printer.3 RAM 32K-bytes

• Used as stack area, work area and data buffer of the CPU.4 Parallel interface5 Gate array (custom IC)

• Inputs or outputs several signals.6 Driver

• The data edited by the CPU and gate array are sent to the printer mechanism after conversion to the signalfor the print head drive, carriage motor drive and paper feed motor drive respectively.

(2) Control Panel BoardThis panel circuit is for manual operation of the printer.

(3) Printer MechanismThe printer mechanism consists of a print head, carriage motor, paper feed motor and detectors.

(4) Power Supply UnitAC power is converted to 25.5VDC and 5VDC.

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THEORY OF OPERATION

2. Main Logic Board

2-1. Data Input Operation

2-1-1. Parallel InterfaceCommunications between the host computer and this printer are facilitated via parallel connectors. This section explainsthe handshake of this interface.The data input circuit of this interface is shown in Fig. 2-2.

Fig. 2-2 Data Input Circuit with Parallel Interface

The following is an explanation of this handshake.(1) When the BUSY signal is LOW (Ready), the host computer outputs 8-bit data 1 through 8 to the connector CN1.

Pin 1 carries the STROBE pulse signal from the host computer to the printer.This signal is normally held HIGH by the host computer. When the host computer has data ready for the printer,it sets this signal to LOW for at least 0.5 µS.

(2) The gate array of the main logic board reads data 1 through 8 at the time of STROBE signal fall, and then turns theBUSY and RDF0 (in the device U1) signals to low.

(3) When the BUSY signal of the gate array is set to LOW, the BUSY signal of connector CN1 will be turned to HIGH,notifying the host computer that data cannot be accepted.

(4) The CPU is informed via the D0 data line that the RDF0 signal is LOW. The CPU then, set the RD signal to LOWand read the data.

(5) Upon completion of the data reading, the CPU notifies the host computer of the data receivable state by setting theBUSY signal of connector CN1 and the ACK signal to LOW for a certain period of time.This concludes the explanation of the parallel interface handshake. The following chart shows the timing chart ofthe handshake.

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THEORY OF OPERATION

Fig. 2-3 Timing Chart of Parallel Interface

2-1-2. Serial Interface (option)When the serial interface is used, an optional Serial Interface Board is required to be installed. The board will change thevoltage level (RS-232C <-------> TTL) and the data transfer method (Serial <-------> parallel).

Fig. 2-4 Serial Interface

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THEORY OF OPERATION

IC4 is a dual RS-232C driver/receiver which includes a capacitive voltage generator to supply RS-232C voltage levelsfrom a single 5V supply.Data from the host computer is sent from RXD via IC4 and is input to the MPU. Serial data input to the MPU is convertedinto parallel data, and output to the main logic board. Conversely, parallel data received by the MPU is converted thereinto serial data, and output to the TXD terminal via IC4.The CTS terminal is hardware-connected, not software- connected. (This signal is not checked.)This printer employs 3 different transfer methods, which can be selected using the dip switches. (Refer to Chapter 1, 5-3 Setting Dip Switches)(1) DTR method

The DTR signal is considered a BUSY signal at the handshake, and when the data buffer capacity is 256 bytes orless, the DTR signal is given a marked status, meaning it cannot receive data.When the capacity of the data buffer increases to 512 bytes or more during printing, the DTR signal is given a spacestatus, which indicates that it can receive data.

(2) XON/XOFF methodWhen a handshake is carried out with the host computer, the XON/XOFF method makes use of ASCII codes (DC1)and (DC3). (DC1 and DC3 are called XON and XOFF, respectively.) When the printer buffer is full, DC3 (ASCII code19) is output to the TXD terminal, and the computer receives a request to stop data transfer. The printer outputs DC3until it (the computer) stops data transfer. During printing, when the buffer full status is cancelled and data can bereceived, DC1 (ASCII code 17) is output to the TXD terminal. When DC1 is output from the printer, the computerfollows the data format, and begins data transfer. Data transfer will continue until DC3 is output again.

(3) ETX/ACK methodThe data block is configured as shown below, but the initial STX code is not necessary. When an STX code is sentfrom the host computer, that 1 byte is ignored. When the ETX code is received, that 1 byte is not regarded as data,an ACK or NACK code is sent to the TXD terminal, and the host computer is informed that data reception has beencompleted.Data block form:

STX DATA (8 KB or less) ETX

Fig. 2-5 Data Format

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THEORY OF OPERATION

(1) DTR method

(2) XON/XOFF method

(3) ETX/ACK method

Fig. 2-6 Data Input Timing Chart with Serial Interface

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THEORY OF OPERATION

2-2. General Flow ChartA general flow chart of editing and printing operations is shown in Fig. 2-7.

Fig. 2-7 General Flow Chart of Editing and Printing

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THEORY OF OPERATION

2-2-1. EditingData stored in the RAM is read out sequentially by the CPU and then edited according to a function code that has beenspecified in advance.This editing takes places until the CR or CR + LF code appears or the line buffer becomes full.

2-2-2. Print Head Driving CircuitEdited print data is output to terminal Q in the gate array through the CPU data bus, as regulated by the issue timing ofa WR signal. However, as for pin 9 (HD9) of the print head, the data is output to the same terminal upon issue of the nextWR signal. When all the data is received for printing, an energized time control signal is output from port PO4 of the CPU.This allows the print data to be output to HD-1 ~ 9 of the gate array. When the print data is HIGH, the transistor TR13will be turned ON for 337 µS, energizing the print head solenoid to drive the print head.

Fig. 2-8 Print Head Driving Circuit

2-2-3. Print Head Temperature Detection CircuitThe print head temperature detection circuit protects against damage when the print head heats up abnormally. Fig. 2-9shows this circuit.The print head has a thermistor to show the temperature of the head solenoids. This thermistor is an element that convertstemperature into voltage. Its output voltage is input to an analog pin of the CPU. The CPU compares this input voltageagainst its reference voltage Vref to find out the temperature of the head solenoids and carries out the following operationsdepending on the temperature.(1) T ≤ 115 ˚C

• Normal print operations(2) 115 ˚C < T < 125 ˚C

• Interval printing; The print head stays for approximately 0.5 second whenever it finishes 1-line. When thetemperature falls bellow 115˚C, normal printing is resumed.

(3) 125 ˚C ≤ T• The line being printed is completed, then printing stops. When the thermistor’s temperature falls below 125 ̊ C,

interval printing is resumed.

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THEORY OF OPERATION

Fig. 2-9 Print Head Temperature Detection Circuit

2-2-4. Carriage Motor Driving CircuitThis printer employs a stepping motor as the carriage motor. Unlike regular motors on the market, this stepping motorwill not operate just by connecting it to a power source. The motor operates only when a drive pulse is fed to it, but eventhen, it turns only a certain angle. This stepping motor is characterized by 4-phase stepping. Control of the motor isfacilitated by phase 1-2 excitation. The following shows the carriage motor drive circuit and the control signal generatedby the phase 1-2 excitation method.

Fig. 2-10 Carriage Motor Driving Circuit

Fig. 2-11 Carriage Motor Driving Signals

The utilization of voltage applied to the carriage motor is described below:Voltage applied to the carriage motor is changed by settingterminal CMNA and CMNB of the gate array to HIGH or LOWand by turning transistors TR5 and TR7 ON or OFF.When TR5 and TR7 is ON, +25.5V is supplied to the carriagemotor and when TR5 and TR7 is OFF, +5V is supplied to themotor via diode D3 and D4.

Mode Voltage Application

Operation: VH (+25.5V) Motor Drive

Standby: VL (+5V) Holding Bias

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THEORY OF OPERATION

2-2-5. Carriage Motor Speed ControlSince the carriage motor is a stepping motor, the carriage can be stopped at a desired position by controlling accelerationand deceleration.The carriage can also move backward.The rotational speed of the carriage motor is set by the number of pulses per time unit. The character pitch (horizontalcharacter size) in each print mode is determined by changing this rotational speed (or carriage transfer speed).(1) At start-up of the motor:

The number of pulses input to the motor increase in steps, reaching a certain frequency.(2) To stop the motor:

The number of pulses input to the motor decreases in steps, in order to gradually bring the motor to a halt.(3) When printing is carried out:

Pulses of a uniform pulse width are supplied for printing.

2-2-6. Paper Feed Motor Driving CircuitAgain, a stepping motor is employed as the paper feed motor, which turns a certain angle only when a drive pulse isreceived. This 4-phase stepping motor is controlled by the phase 1-2 excitation method. The following shows the paperfeed motor drive circuit and the control signal generated by the phase 1-2 excitation method.

Fig. 2-12 Paper Feed Motor Driving Circuit

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THEORY OF OPERATION

Fig. 2-13 Paper Feed Motor Driving Signals

The utilization of voltage applied to the paper feed motor is described as follows.

Mode Voltage Application

Operation VH (+25.5V) Motor Drive

Standby: VL (+5V) Holding Bias

Voltage to the paper feed motor is changed by setting CPU port P31 to LOW or HIGH and by turning transistor TR6 andtransistor array TA1 ON or OFF.When TA1 is turned on, +25.5V is applied to the paper feed motor.When TA1 is turned off, +5V is supplied to the motor via diode D2.

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THEORY OF OPERATION

2-3. Reset CircuitThe RESET signal initializes the circuit elements and prevents operation errors when the power is turned on.The RESET signal is output for approx. 34ms. when the power is turned on, or while the RESET ( INPUT-PRIME ) signalis being output from the host computer.

Fig. 2-14 Reset Circuit and Protection Circuit.

• Power On Reset1 When the power is turned on, the RESET signal is output to Pin 5 of IC2 (M51953BL) for approx. 34 msec. This

time length is determined by external capacitor C7 (0.1µF), and it can be calculated by the following formula.T = 0.34 × C7 (pF) µsec.

2 This LOW signal triggers RESET command to the CPU and the RESET terminal ( RES ) of the gate array.

3 Resetting the CPU and the gate array will ignore all the drive signals for the carriage motor, the paper feed motorand the print head, preventing operation errors at power ON.

• Reset by Input Prime Signal from Host Computer1 The input prime signal from the host computer is output to pin 31 of the connector CN1.

2 This output signal will set the terminal INIT 2 of the CPU to LOW, executing interruption. Then, the CPU will beinitialized.

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THEORY OF OPERATION

2-4. Reset by +5V Line Voltage DetectionA voltage-detecting IC (IC2 in Fig. 2-14) detects momentary drops in voltage or unstable voltage supply (due to powerfailures, etc.) on the +5V line. If the voltage on the +5V line falls below 4.25V, the RESET signal appears at the outputterminal of the voltage-detecting IC.

Fig. 2-15 Equivalent Circuit of Fig. 2-16 Operational Timing ChartVoltage-Detecting IC

2-5. Protection CircuitThis printer is provided with a protection circuit which shuts off the print head and motor driving circuits in the event ofa CPU malfunction. (Refer to Fig.2-14)

The CPU normally outputs a LOW level signal from the terminal (WD OUT).However, if the CPU malfunctions, it can not output this signal.

When the LOW level signal is not output from the CPU, the input terminal (Cd) of the voltage-detecting IC goes to LOWand the RESET signal is output from the output terminal (OUT) of the voltage-detecting IC. By this signal, the CPU andthe gate array are reset and the print head, the carriage motor and paper feed motor driving signals are ignored, protectingthe printer from the CPU runaway.

3. Power Supply UnitThe power supply circuit converts the incoming AC power to DC voltages, +5V and +25.5V.

Voltage Tolerance Application

VH (+25.5V) DC25.5V±5% To drive print head, carriage motor, paperfeed motor.

+5V DC5V±2.5% To supply power to CPU, ROM, RAM, TTLand ICs.

VL (+5V) DC5V±10% To retain carriage motor and paper feedmotor.

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THEORY OF OPERATION

4. Mechanism

4-1. Print Head MechanismThe print head consists of 9 needle wires and 9 print solenoids.The following explains how each needle wire operates during printing.(1) When the print solenoid is energized, the clapper is attracted by the iron core and the needle wire is driven toward

the platen.(2) This needle wire hits the platen via the ink ribbon and paper. A single dot is printed on the paper.(3) When the print solenoid is de-energized, the needle wire is returned to its original position by rebound energy and

spring and clapper holder (leaf spring) force.

Fig. 2-17 Outline of Print Head Mechanism

4-2. Print Head Carrying MechanismThe print head carrying mechanism consists mainly of a carriage, timing belt, carriage motor, and home position detector.(1) Carriage

The carriage is supported horizontally by means of the carriage stay and rear angle, and it moves from side to sidewith the print head mounted above it. A timing belt is clamped to the base of the carriage and a shield plate is mountedat the base for home position detection.

(2) Timing BeltThe timing belt is suspended between the timing pulley of the carriage motor and the timing pulley of the tensionlever, and it maintains a constant tension.The timing belt is also clamped to the base of the carriage so that it can move the carriage accurately with drivingforce from the carriage motor.

(3) Carriage MotorThe carriage motor is a HB (Hybrid) type, four-phase and 192-pole pulse motor, which is driven by pulse signalsfrom the control circuit. The rotational rate depends on the number of pulses per unit time. By varying this rotationalrate (that is, the carriage carrying rate), the size of the horizontal letters can be changed in each print mode.

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THEORY OF OPERATION

Fig. 2-18 Print Head Carrying Mechanism

4-3. Ink Ribbon Feed MechanismThe ink ribbon feed mechanism is linked to the print head carrying mechanism described previously so that the ink ribbonis wound up automatically while the carriage moves left or right.The ribbon feed mechanism is driven by torque from the carriage motor, and carriage movement allows the idler gear torotate.This rotation is conveyed sequentially to the gears that work to wind the ribbon. The carriage is equipped with a clutchlever so that the direction of cassette gear rotation remains constant regardless of the direction of the idler gear rotation.

Fig. 2-19 Ribbon Feed Mechanism

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THEORY OF OPERATION

4-4. Paper Feed MechanismThe paper feed motor is a PM (Permanent Magnet) type, four-phase and 48-pole pulse motor.Minimum paper feed is set at 1/432 inch.There are two ways of feeding paper available with this printer: Friction method and Tractor method. You can select oneof the two methods, using the release lever.

Position of release lever [1] [2]

Linkage between tractor

gear and tractor clutch

Platen roller and holder roller Pressured Not

Release lever position detector Closed Open

Paper feeding method Friction Tractor

(1) Friction MethodFriction method is selected when the release lever is position [1].With this method, paper is pressed between the platen roller and the holder roller therefore, paper is fed as the rollersturn.As the paper feed motor is driven, the motor gear, through the idler gear, turns the platen gear in the paper feedingdirection. However, since the tractor gear and the tractor clutch are not linked at this time, the tractor unit will notbe driven.

(2) Tractor MethodTractor method is selected when the release lever is position [2] .Paper feeding is facilitated by rotation of the sprocket pin of the tractor unit. When the tractor method is selected,the tractor gear is linked to the tractor clutch, enabling the drive force generated by the paper feed motor to betransferred to the tractor unit via the idler gear and the platen gear.

Fig. 2-20 Paper Feed Mechanism

Not Linked

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THEORY OF OPERATION

4-5. Detectors(1) Home Position Detector

A photo-interrupter is used in the home position detector, which is set at the left side of the frame unit.ON/OFF signals are generated according to the position of the shield plate mounted at the base of the carriage, andthe printing position is determined by these signals.

(2) Paper Out Detector Two paper out detectors are located at the paper insertion slit. When paper is present, the phototransistor with the reflecting type photo sensor goes on. As soon as paper runs out, this transistor goes off, outputtinga paper empty signal.

Fig. 2-21 Home Position Detector Fig. 2-22 Paper Out Detector

(3) Bail Lever Position DetectorThe leaf switch is open when the bail roller is in contact with the platen roller, and it is closed when the bail rolleris separated from the platen roller.

(4) Release Lever Position DetectorThe leaf switch is closed when the release lever is in the Friction position, and is open in the Tractor position.

Fig. 2-23 Bail Lever Position Detector Fig. 2-24 Release Lever Position Detector

CHAPTER 3ADJUSTMENTS

This printer has undergone various adjustments so that it will achieve standard performance. In this chapter,a brief explanation is given of the methods of adjustments.Please check this explanation when making maintenance inspections or when replacing parts to correctmalfunctions.

1. Gap Adjustment Between Print Head and Platen ............................................ 31

1-1. Measuring Gap Between Print Head and Platen................................................. 31

1-2. Adjusting Gap Between Print Head and Platen .................................................. 31

2. Adjustment of Timing Belt Tension ................................................................... 32

3. Adjustment of Home Position Detector ............................................................ 33

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ADJUSTMENTS

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ADJUSTMENTS

– 31 –

1. Gap Adjustment Between Print Head and Platen

1-1. Measuring Gap Between Print Head and Platen(1) Remove the upper case unit according to procedures

described in Chapter 4.(2) Set the adjustment lever [1] at step two.(3) Remove the ribbon guide [2].(4) Insert a thickness gauge [3] between the print head

[4] and the platen [5], and measure the gap.(5) This measurement must be carried out at the left [L],

center [C] and right [R] .(6) The standard gap value is 0.30 to 0.40 mm.(7) If the gap does not lie within this range,adjust it by

following the procedure in item 1-2.

Fig. 3-2 Position of Adjustment Lever Fig. 3-3 Gap Measurement

1-2. Adjusting Gap Between Print Head and PlatenIf the gap does not lie within the standard range, adjust it bycarrying out the following procedures.(1) Remove the printer mechanism according to the

procedures described in Chapter 4.(2) Loosen the nut [6].(3) Insert the shaft in the ø2.5 hole [7].

Adjust the gap at the left by rotating the carriage stay[8] with the shaft.When the shaft is lowered to the platen side, the gapis reduced, and when lowered to the opposite side,the gap is expanded.

(4) Next, hold the position of the shaft in the ø2.5 hole[7] , rotate the right adjustment bush [9] , and adjustthe gap at the right.

(5) After adjusting, set the adjustment lever [1] to theposition shown in Fig. 3-2 and tighten the nut [6].

(Note) When tightening the nut [6], make sure that thecarriage stay [8] does not move.

(6) Install the ribbon guide [2] .

Fig. 3-4 Gap Adjustment

Fig. 3-1 Gap Adjustment

ADJUSTMENTS

– 32 –

2. Adjustment of Timing at Belt TensionThe timing belt tension should be set at from 18g to 21g.(The belt tension must be measured with the designated tension gauge [1] .) After the belt has been used for a long time,however, it may be difficult to maintain prescribed tension because of belt deterioration or wear. In these cases, makeadjustments by following the procedures listed below.(1) Remove the upper case unit according to the procedures described in Chapter 4.(2) Move the carriage unit [2] right and left two or three times in order to familiarize yourself with the timing belt [3].(3) Set the adjustment lever [4] at step 2 as shown in Fig. 3-2.(4) Move the carriage unit [2] to the right end.(5) Set the arm [5] of the tension gauge [1] 206 mm apart from the frame L.(6) Move the tension gauge [1] in the opposite direction of the platen [6] until it stops. Then place the arm [5] of the

tension gauge on the timing belt [3].(7) Loosen the screw [7].(8) Insert a flat-blade screwdriver into the square hole of frame and adjust the belt tension by moving the tension arm

[8] left or right.(9) When the belt has been adjusted to the prescribed tension, tighten the setting screw [7].(10) If the belt cannot be adjusted to the prescribed tension, replace it with a new timing belt [3].

Fig. 3-5 Adjustment of Timing Belt Tension

Fig. 3-6 Tension Measurement

ADJUSTMENTS

– 33 –

3. Adjustment of Home Position Detector(1) Remove the printer cover.(2) Loosen the screw [1].(3) Set the projection [3] of the home position detector [2] between the two lines stamped.(4) Tighten the screw [1].

Fig. 3-7 Adjustment of Home Position Detector

ADJUSTMENTS

– 34 –

CHAPTER 4PARTS REPLACEMENT

This chapter explains disassembly and reassembly of the printer.Note the following precautions during disassembly and reassembly.1. Disconnect the printer from the wall outlet before servicing it.2. Assembly is the reverse of disassembly unless otherwise specified.3. After reassembly, coat the screw heads with locking sealant.4. Lubrication information is not provided in this chapter. Refer to item 2 in chapter 5.

1. Upper Case Unit .................................................................................................. 37

2. Control Panel Board ........................................................................................... 37

3. Printer Mechanism .............................................................................................. 38

4. Main Logic Board ................................................................................................ 38

5. Fuse Board Unit .................................................................................................. 39

6. Fuses .................................................................................................................... 39

7. Print Head ............................................................................................................ 40

8. Paper Feed Motor Unit ........................................................................................ 40

9. Carriage Motor Unit ............................................................................................. 41

10. Bail Roller Shaft Unit .......................................................................................... 41

11. Platen Unit ........................................................................................................... 42

12. Tractor Unit .......................................................................................................... 42

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PARTS REPLACEMENT

– 36 –

PARTS REPLACEMENT

– 37 –

1. Upper Case Unit(1) Turn off the power switch [1](2) Remove

• Printer cover• Rear cover• Platen knob [2]• ROM cover [3]• Five tapping screws [4]

(3) Move the carriage unit [5] over the right so that italigns with the cut-out of the upper case unit [6] .

(4) Remove• Upper case unit [6]

Push the hook [7] of the lower case to separate theupper case unit [6] and lower case, next lean theupper case unit [6] forward for removal.

• Cable [8] of control panel board

2. Control Panel Board(1) Remove

• Upper case unit according to the procedure de-scribed in item 1.

• Three tapping screws [1]• Control panel board [2]

PARTS REPLACEMENT

– 38 –

3. Printer Mechanism(1) Remove


• Five tapping screws [1]• Screw [2]• Cable holder [3]

Lift up the tab of the cable holder, and slide it tothe left for removal.

• Printer head cable [4]• Four connectors [5]• Printer mechanism [6]

4. Main Logic Board(1) Remove

• Printer mechanism according to the proceduredescribed in item 3.

• I/F cartridge unit [1]• Connector [2]• Five screws [3]• Screw [4]• Main logic board [5]

PARTS REPLACEMENT

– 39 –

5. Fuse Board Unit(1) Remove


• Connector [1]• Two tapping screws [2]• Tapping screw [3]

(Except for HK)• Tapping screw [4]• Power switch [5]• Fuse board unit [6]

6. Fuses(1) Remove


(2) Inspect• Fuse F1 [1]• Fuse F201 [2]• Fuse F202 [3]Defective → Replace fuse as follows:

AC voltage F1

120V 5TT1A

220V/240V 630mA

F201, F202

For US, UK, AS,TW, LA, HKFor EC, SC, SU, PL 3.15A

New fuse blown → Inspect circuit

5TT3A

PARTS REPLACEMENT

– 40 –

7. Print Head(1) Remove

• Printer cover• Ink ribbon cartridge• Cable holder [1]• Two tapping screws [2]• Head cable [3]• Print head [4]WARNING: The print head become hot after print-

ing so wait for it to cool before remov-ing it.

(2) Adjust• Gap between print head and platen.

Refer to item 1 of Chapter 3.

8. Paper Feed Motor Unit(1) Remove


• Cord fastener binding the lead wires.• Connector [1]• Two screws [2]• Paper feed motor unit [3]

PARTS REPLACEMENT

– 41 –

9. Carriage Motor Unit(1) Remove


• Cord fastener binding the lead wires.• Connector [1]• Two screws [2]• Carriage motor unit [3]

(2) Adjust• Timing belt tension


10. Bail Roller Shaft Unit(1) Remove


• Stop ring SE3 [1]• Spring [2]• Bail Lever L [3]• Bail roller shaft unit [4]Caution in assembly:

Align the ∆ mark on the bail lever L [3] with the●● mark on the gear [5] to install the bail lever L[3] .

PARTS REPLACEMENT

– 42 –

11. Platen Unit(1) Remove


(2) Move the bail lever [1] forward.(3) Remove

• Two nuts [2]• Tractor stay [3]• Ground contact spring [4]• Platen holder R [5]• Platen holder L [6]

Lift the tabs [7] of platen holders R and L to allowremoval of platen holders R and L from the frame.

• Platen unit [8]Caution in assembly:

When assembling the platen gear assembly [9] onthe idler gear, align the teeth of gear A and gear B(be sure to align the holed [10] in the two gears.)

(4) Adjust• Gap between print head and platen.


12. Tractor Unit(1) Remove

• Platen unit according to the procedure describedin item 11.

• Stop ring [1]• Release lever [2]• Two nuts [3]• Two tractor bushings [4]

Lift the tab [5] of the tractor bush allow removalof the tractor bush from the frame.

• Tractor unit [6]Caution in assembly:

Aligen the mark ( or ) on the release lever [2],with the mark ( or ) on the release gear [7] toinstall the release lever [2].

CHAPTER 5MAINTENANCE AND LUBRICATION

1. Maintenance ........................................................................................................ 45

1-1. Cleaning ................................................................................................................. 45

1-2. Checks ................................................................................................................... 45

2. Lubrication ........................................................................................................... 46

2-1. Lubricant ................................................................................................................ 46

2-2. Lubricating Method ............................................................................................... 46

2-3. Lubricated Areas ................................................................................................... 46

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– 44 –

– 45 –

MAINTENANCE AND LUBRICATION

1. MaintenanceIn order to maintain the optimum performance of this printer and to prevent trouble, maintenance must be carried outaccording to the following items.

1-1. Cleaning(1) Removal of dirt

Wipe off dirt with a soft cloth soaked in alcohol or benzine.*Note: Do not use thinner, trichlene or ketone solvents because they may damage plastic parts. Also during

cleaning, be careful not to moisten or damage electronic parts, wiring, or mechanical parts.(2) Removal of dust, pile, etc.

Vacuum cleaning (with an electric cleaner) is preferred. Remove all dust, etc., inside the printer.*Note: After cleaning, check the oil level. If it is not adequate due to cleaning, replenish it.

1-2. ChecksChecks must be carried out at two levels: “a daily check” which the operator can easily carry out during operation, and“periodic check” which an expert should carry out.(1) Daily check

When the printer is used on a daily basis, check that the printer is used properly. Make sure that the printer isoperating under the best conditions.• Is any paper stuck in the paper box or printer case?• Is the cartridge ribbon set at the right position?• Is there any foreign matter inside the printer? (Remove if any.)• Is the print head getting excessively dirty?

(2) Periodic checkAfter 6 months or printing 1 million lines, the periodic check and lubrication must be carried out.• Check for deformation of springs.• Check the gap between the platen and the print head.• Remove dust, dirt, etc., around the detectors.

– 46 –


2. LubricationLubrication is very important to maintain optimum performance and to prevent trouble.

2-1. LubricantThe type of lubricant greatly affects the performance and durability of the printer, especially in a low temperatureenvironment. We recommend use of the grease and lubrication oils listed below for this printer.

Product name Maker

FLOIL GB-TS-0 Kanto Chemicals Co., Ltd.

KF96-1000CS Shinetsu Chemical Industry

Mobil 1 Mobil oil

2-2. Lubricating MethodWhen lubrication is carried out in assembly and disassembly, wash parts well to remove dust and dirt before lubrication.Lubrication must be carried out regularly once every 6 months or after 1 million lines have been printed. Lubrication isnecessary irrespective of the regular lubrication whenever lubricant becomes deficient after cleaning or whenever partshave been disassembled or replaced.

2-3. Lubricated Areas

NO. Lubricating Point Grease/Oil

[1] Rubbing surfaces of idler gear 16 × 72 × 0.5 and idler gear shaft A GB-TS-0

[2] Rubbing surfaces of gear 40 × 0.5 and gear shaft GB-TS-0

[3] Rubbing surfaces of tractor shaft and tractor bushing GB-TS-0

[4] Rubbing surfaces of tractor shaft and release lever GB-TS-0

[5] Rubbing surfaces of carriage stay and bushing 14 × 16 × 10 Mobil 1

[6] Rubbing surfaces of clutch shaft and gear 22 × 1.0 Mobil 1

[7] Rubbing surfaces of release shaft and paper chute GB-TS-0

[8] Rubbing surfaces of roller holder and lower case GB-TS-0

[9] Rubbing surfaces of ribbon cassette gear and carriage GB-TS-0

[10] Rubbing surfaces of idler gear 70 × 0.3 and carriage GB-TS-0

[11] Rubbing surfaces of idler gear B 16 × 1 - 40 × 0.3 and carriage GB-TS-0

[12] Rubbing surfaces of clutch gear and carriage GB-TS-0

[13] Rubbing surfaces of idler gear 17 × 41 × 0.3 and gear shaft C GB-TS-0

[14] Rubbing surfaces of pulley cap and pulley shaft GB-TS-0

[15] Rubbing surfaces of timing pulley and stop ring GB-TS-0

[16] Rubbing surfaces of tractor holder and tractor cover KF96-1000CS

[17] Rubbing surfaces of adjusting lever and frame GB-TS-0

[18] Rubbing surfaces of idler gear 24 × 40 × 0.5 and gear shaft GB-TS-0

– 47 –


Fig. 5-1 Lubricated Areas 1

– 48 –


Fig. 5-2 Lubricated Areas 2

– 49 –

CHAPTER 6TROUBLESHOOTING

1. Troubleshooting Procedures ............................................................................. 51

2. Unit Replacement Flow Chart ............................................................................ 52

3. Repair by Unit Replacement .............................................................................. 53

4. Repair by Replacement of Parts ........................................................................ 59

4-1. Does not Operate at All with Power on ............................................................... 59

4-2. Power Supply Circuit Abnormal .......................................................................... 60

4-3. Defective Motor Operation ................................................................................... 61

4-4. Defective Print Head Operation ........................................................................... 62

4-5. Defective Interface Operation .............................................................................. 63

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– 50 –

– 51 –

TROUBLESHOOTING

1. Troubleshooting ProceduresTroubleshooting is never easy because various problems arise depending upon the particular location of the breakdown,but the following procedures should be adhered to in making repairs.

(1) At the first stage, conduct repairs through unit replacements.The two display codes appearing in the flow chart are defined as follows: 1) indicates main logic board replacementand 2) indicates printer mechanism replacement, to be carried out if the problem has not been corrected.

1) Main Logic Board Replacement

2) Printer Mechanism Replacement

Check again at this time whether the replaced unit is malfunctioning. (This is done to rule out trouble caused by impropercontact of connectors.)Replaceable units consist of the following:• Power supply unit• Main logic board• Printer mechanism• Control panel boardIn replacing these units, always refer to the unit replacement flow chart.(2) At the second stage, use the flow chart for repair by parts replacement to replace defective elements inside a

particular unit.(Note 1) Before starting to repair, be sure to check visually the contact of the connector and the mounting of the IC

in the IC socket.(Note 2) Always turn off power source and remove power plug before replacing any units or parts.(Note 3) If any check items appear on the flow chart, be sure to always check them. Otherwise, newly mounted parts

or units may become damaged.(Note 4) If, in the process of making repairs, there is any confusion about proper procedures, start to do the job again

from the beginning.(Note 5) Be careful to avoid injury from static electricity when handling ICs and main logic boards.(3) The following relate to the “*” marks in the flow chart.

*1 See (6) and (7) waveform in Item 11 of Chapter 7.*2 See (8) and (9) waveform in Item 11 of Chapter 7.*3 See (4) and (5) waveform in Item 11 of Chapter 7.*4 See 3. Power Supply Circuit in Chapter 2.*5 See (10) waveform in Item 11 of Chapter 7.*6 See (2) RESET waveform in Item 11 of Chapter 7.*7 See (1) Crystal waveform in Item 11 of Chapter 7.

– 52 –

TROUBLESHOOTING

2. Unit Replacement Flow Chart

Unit Exchange Sequence

Powersupply unit

Mainlogic board

Printermechanism

Controlpanel board

ProblemDetailsCategory Remarks

Specific displaylamp only willnot glow

Specific switchonly cannot beinput

Buzzer does notsound (soundvolumeinadequate)

Strange soundsduring operation

No motorholding power(power veryweak)

Dots skipped

Print is too light

Ink ribbonentanglement(wire sticks out)

Absence of papernot detected

Lever positionnot detected

Incorrect printing

Ink ribbon notforwarded

No operation atDIP switchsetting

Faulty operationwhen power isturned on/off

Abnormal motoroperating speed(slow)

Fuse blownduring operation

2

2

1

1

1

2

2

2

2

1

1

1

1

1

1

2

3

2

1

1

1

1

1

2

2

2

1

1

Ink ribbon

Gap check

Check I/F cable

EDS mode

Note: The figures 1, 2 and 3 mean the priority of replacement.

Ope

ratio

n re

late

dM

otor

rel

ated

Prin

t hea

dre

late

dD

etec

tor

rela

ted

Inte

rfac

e re

late

d an

d ot

hers

– 53 –

TROUBLESHOOTING

1) Replace main logic board.

2) Replace printer mechanism.

Carriage motoroperating waveform is

normal? *1

YES

Replace printer mechanism.

A

NO

NO

A

NO

1) Replace main logic board.

2) Replace printer mechanism.

A

NO

NO

Home positionswitch signal is

normal?

YES

Replace main logic board.

START

* Turn power off.* Remove I/F cable.* Mount ink ribbon.* Set paper.* Move carriage to center.

Turn power on.

CarriageMovement?

YES

Carriage operatesnormally?

YES

Carriage stops athome position?

YES

3. Repair by Unit Replacement

B

– 54 –

TROUBLESHOOTING


On line lamp signal is normal?

YES

Replace control panel board.

NO

1) Replace main logic board.2) Replace printer mechanism.

NO


A

NO

NO

Paper feedmotor drive waveform

is normal? *2

YES


A

A

Selfprinting:

E

Carriage motordrive waveform is

normal? *1

YES


On line lamps light?

YES

On line switch in on.(Take Off Line)

On line lamp is out?

YES

Paper feed switch is on.

Paper feed switchoperation is normal?

YES

Power is off.

Power source is on whilepressing paper feed switch.

Carriage operatesnormally?

YES

NO

NO

NO

– 55 –

TROUBLESHOOTING


A

NO

Print headdrive signal waveform is

normal? *3

YES


NO

NO

C

NO

NO

A

Paper feed motor drive waveform is

normal? *2

YES


Printing operationis normal?

YES

Paper feedoperation is

normal?

YES

Ribbon feedoperation is

normal?

YES

Self printing terminates.

Check host computerconnection.

Power is off and I/F cable isconnected.

Power is on.

Print program operationbegins from host computer.

A

1) Replace ink ribbon.2) Replace printer mechanism.


– 56 –

TROUBLESHOOTING

1) Replace I/F cable.2) Replace main logic board.3) Check host computer.

1) Replace main logic board.2) Replace printer

mechanism.3) Replace control panel

board.


Replace power supply unit.

C

D

B

NO

NO

NO

YES

NO

Printing begins?

YES

Printingoperation normal?

YES

Printer is normal; hostcomputer print program stops.

END

Works withcarriage hand?

YES

Output(VH, VL, +5V)

of power supply unit isnormal? *4

NO

Power source is off.

Fuse blows out?

YES

Replace fuse.

Remove connector CN201 ofmain logic board.

Power source is on.

A

– 57 –

TROUBLESHOOTING

Output ofpower supply unit is

normal? *4

YES

Power source is off.

Connect connectorCN201 of

main logic board.

Power source is on.

Fuse blows out?

YES

Replace fuse

1) Replace main logic board.2) Replace printer mechanism.3) Replace control panel board.

NO

NO

A

Replace power supply unit.

– 58 –

TROUBLESHOOTING

YES

NO

YES

YES

1) Replace I/F cable.2) Replace main logic board.

D

NO

NO

E

A

CA

I/F mode setup properly?

NO

I/F mode set up changed.

I/F signal isnormal? *5

NO

Ready condition?

YES

There is datatransmission?

NO

Hardware check or checkof host computer printprogram.

On line switchgoes ON/OFF?

YES

On line lampdrive signal is

normal?

YES

Replace main logic board. 1) Replace control panel board.2) Replace main logic board.


– 59 –

TROUBLESHOOTING

DC Power abnormal.

Check RESET circuit;replace parts.

Check crystal circuit;replace parts.

1) Replace CPU or ROM.2) Check relevant circuit.

NO

NO

NO

NO

See 4-2. Power SupplyCircuit Abnormal.

START

VH, VL, +5Vare

supplied? *4

YES

RESETsignal becomes

HIGH? *6

YES

Crystalwaveform isnormal? *7

YES

ROM OEsignals become

LOW?

YES

Carriage motor abnormal.

Check operation.

END

4. Repair by Replacement of Parts

4-1. Does not Operate at All with Power on

– 60 –

TROUBLESHOOTING

Check or replace1) IC2012) D201

Check or replace.1) IC2022) TR2013) ZD201

YES

YES

YES

YES

YES

ReplaceTransformer.

The no load voltages are below:

ACS1 About AC30V

ACS2 About AC9V

START

Fuse F1is blown?

NO

ACS1 andACS2 aresupplied?

NO

ReplaceTransformer.

Check operation.

END

Replace Fuse F1

Fuse isblown again?

NO

Connect theconnector CN201.

Fuse F201is blown?

NO

Fuse F202is blown?

NO

4-2. Power Supply Circuit Abnormal(1) Remove connectors CN201 of the main logic board.

– 61 –

TROUBLESHOOTING

4-3. Defective Motor Operation

NO

NO

NO

NO

STARTSTART

Check or replace1) TA12) TR63) CPU

Check or replace1) TA22) CPU

LF-CMNsignal is normal?

*2

YES

LF-ø1,ø2, ø3, ø4 arenormal? *2

YES

ReplaceLF-motor

Check operation

END

Check or replace1) TA12) TR5 or TR13) CPU

Check or replace1) TA32) CPU

CR-CMNsignal is normal?

*1

YES

CR-ø1,ø2, ø3, ø4 arenormal? *1

YES

ReplaceCR-motor

Check operation

END

– 62 –

TROUBLESHOOTING

A specificpin does not

work?

NO

Print is light as whole?

NO

Check or replace1) TR8 ~ TR16

Adjust gap(Refer to chapter 3.)

Power supplyunit abnormal.(Refer to item 4-2.)

Check or replace1) Gate array2) CPU

NO

NO

NO

YES

YES

START

Does notprint at all?

YES

VH(+25.5V)line is

supplied?

YES

Check or replace1) TR12) Gate array

Headenergizing controlsignal is normal?

*3

YES

Check or replace1) Print mechanism

END

4-4. Defective Print Head Operation

– 63 –

TROUBLESHOOTING

4-5. Defective Interface Operation

Check I/F cable.

Check or replace1) IC32) Gate array3) CPU

NO

YES

START

Set at on line

Start print programof host computer.

Is I/Fsignal normal? *5

YES

Incorrect printgenerated?

NO

Check operation

END

– 64 –

CHAPTER 7PARTS LIST

HOW TO USE PARTS LIST(1) DRWG. NO.

This column shows the drawing number of the illustration.(2) REVISED EDITION MARK

This column shows a revision number.Parts that have been added in the revised edition are indicated with “#”.Parts that have been abolished in the revised edition are indicated with “*”. For examplr,#1: First edition→ Second edition #2: Second edition→ Third edition*1: First edition→ Second edition *2: Second edition→ Third edition

(3) PARTS NO.Parts numbers must be notified when ordering replacement parts.

(4) PARTS NAMEParts names must be notified when ordering replacement parts.

(5) Q’TYThis column shows the number of the part used as indicated in the figure.

(6) REMARKSWhen there are differences in the specifications of the fuse, destinations, etc., the differences are described inwords or indicated by two letters.US ... U.S.A. EC ... EC(with Germany) UK ... United Kingdom SC ... ScandinaviaAS ... Australia HK ... Hong Kong TW ... Taiwan SU ... RussiaLA ... Lation America PL ... PolandThe seal number of ROM is described in this column. The “**” mark of seal number is a variable representingon the software version.

(7) RANKParts marked “S” are service parts. Service parts are recommended to be in stock for maintenance.

1. Printer Assembly .............................. 661-1. Disassembly Drawing ................... 661-2. Parts List ......................................... 66

2. Printer Mechanism ........................... 692-1. Disassembly Drawing ................... 692-2. Parts List ......................................... 70

3. Sub-assembly ................................... 713-1. Upper Case Unit .............................713-2. Lower Case Unit .............................723-3. Interface Cartridge Unit ................ 733-4. Pull Tractor Unit (option) .............. 743-5. Frame Unit ...................................... 753-6. Tractor Unit .....................................773-7. Platen Unit ...................................... 78

4. Wiring Scheme of Printer ................ 79

5. Main Logic Board ............................. 805-1. Circuit Diagram...............................805-2. Component Layout .........................845-3. Parts List ......................................... 85

6. Control Panel Board ........................ 88

6-1. Circuit Diagram...............................886-2. Component Layout .........................896-3. Parts List .........................................89

7. Fuse Board ....................................... 907-1. Circuit Diagram...............................907-2. Component Layout .........................907-3. Parts List .........................................90

8. Parrallel Straight Board ................... 918-1. Circuit Diagram...............................918-2. Component Layout .........................928-3. Parts List .........................................92

9. Serial Buffer Board (option) ............ 939-1. Circuit Diagram...............................939-2. Component Layout .........................949-3. Parts List .........................................95

10. Parallel Buffer Board (option) ......... 9610-1.Circuit Diagram...............................9610-2.Component Layout .........................9710-3.Parts List .........................................98

11. Waveform with Oscilloscope .......... 99

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– 66 –

1. Printer Assembly

1-1. Disassembly Drawing

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RANK 1 89064810 MECHANISM WITH HEAD DP935 1 S 2 *1 82900772 RIBBON HOLDER 891 1 TO SECTION 2-2 S 3 87291130 LOWER CASE UNIT NX-1500 1 EXCEPT FOR SC S

87291150 LOWER CASE UNIT LC-15 SC 1 FOR SC S

1-2. Parts ListPrinter Assembly

– 67 –

4 87292150 MAIN LOGIC BOARD UNIT NX-1500 1 US,UK,AS,TW,LA S87292160 MAIN LOGIC BD UNIT NX-1500 HK 1 FOR HK S87292170 MAIN LOGIC BD UNIT LC-15 EC 1 FOR EC,SC S

*2 87292170 MAIN LOGIC BD UNIT LC-15 EC 1 FOR SU S#2 87295900 MAIN LOGIC BD UNIT NX-1500 SU 1 FOR SU S#2 87295880 MAIN LOGIC BD UNIT LC-15 PL 1 FOR PL S

5 87294110 FUSE BOARD UNIT NX-1500 US 1 FOR US,TW S87294120 FUSE BOARD UNIT LC-15 EC 1 FOR EC,SC,LA,PL S

*2 87294120 FUSE BOARD UNIT LC-15 EC 1 FOR SU S*3 87294300 FUSE BOARD UNIT NX-1500 SU 1 FOR SU S#3 87294120 FUSE BOARD UNIT LC-15 EC 1 FOR SU S

87294130 FUSE BOARD UNIT LC-15 UK 1 FOR UK S87294140 FUSE BOARD UNIT LC-15 AS 1 FOR AS S87294150 FUSE BOARD UNIT NX-1500 HK 1 FOR HK S

6 87290190 UPPER CASE UNIT NX-1500 1 FOR US,HK,TW,LA S87290200 UPPER CASE UNIT LC-15 1 FOR EC,UK,AS,SC S

#1 87290370 UPPER CASE UNIT NX-1500 SU 1 FOR SU(NX)#1 87295140 UPPER CASE UNIT LC-15 SU 1 FOR SU(LC)#2 87295150 UPPER CASE UNIT LC-15 PL(P) 1 FOR PL

7 *3 83023420 PRINTER COVER NX-1500 1 S#3 83023421 PRINTER COVER NX-1500 1 S

8 *3 87296050 PAPER GUIDE UNIT NX-1500 1 S#3 87816240 PAPER GUIDE UNIT XBL-15II 1 S

9 *1 83023430 REAR COVER NX-1500 1 S*3 83023431 REAR COVER NX-1500 1 S#3 83025801 REAR COVER XBL-15II 1 S

10 *3 87296030 PLATEN KNOB UNIT NX-2400 1 S#3 87816230 PLATEN KNOB UNIT XBL-15II 1 S

11 80981220 INK RIBBON CARTRIDGE JAN X9 1 EC,UK,AS,SC,SU,LA S*2 80981220 INK RIBBON CARTRIDGE JAN X9 1 FOR TW,HK S#2 80982200 INK RIBBON CARTRIDGE JAN Z9HD 1 FOR TW,HK S*2 80981210 INK RIBBON CARTRIDGE UPC X9 1 FOR US,LA S#2 80982210 INK RIBBON CARTRIDGE UPC Z9HD 1 FOR US,LA S*4 80981880 INK RIBBON CARTRIDGE UPC LZ9 1 FOR US,LA :OPTION#4 80981900 INK RIBBON CARTRIDGE UPC LZ9 1 FOR US,LA :OPTION#1 80981890 INK RIBBON CARTRIDGE JAN LZ9 1 EXC.FOR US,LA:OPTION

12 *2 83910911 CABLE HOLDER 921 1 S#2 83910912 CABLE HOLDER 921 1 S

13 *3 83911440 ROM COVER NX-1500 1 S#3 83025810 ROM COVER XBL-15II 1 S

14 *2 87299210 IF CARTRIDGE UNIT X15 1 PARALLEL I/F S#2 87808010 CARTRIDGE PAR UNIT Z15 1 PARALLEL I/F S

89597010 BUFFER CARTRIDGE IP-128XL UPC 1 FOR US,LA :OPTION89597030 BUFFER CARTRIDGE IP-128XLHKJAN 1 FOR HK :OPTION89597020 BUFFER CARTRIDGE IP-128XL JAN 1 EXC.FOR US,LA,HK:OP.87299220 SERIAL CARTRIDGE IS-8XL UPC 1 FOR US,LA :OPTION87299230 SERIAL CARTRIDGE IS-8XL JAN 1 EXC.FOR US,LA,HK:OP.87299240 SERIAL CARTRIDGE IS-8XL JAN HK 1 FOR HK :OPTION

15 01903055 SCREW TR 3-8 WS/WF 1 S16 01903038 SCREW TAT 3-10 PT-FL 5 S17 01914036 SCREW TR 4-5 WS 1 EXCEPT FOR HK,SU S17a 01914036 SCREW TR 4-5 WS 1 EXCEPT FOR SU S18 *2 01914039 SCREW TAT 4-8 WS 1 S

#2 01914034 SCREW TAT 4-8 CT-WF 1 S19 *3 01704103 SCREW TRS 4-10-C 2 FOR US S

*3 01901425 SCREW TR 4-10 FL 2 EXCEPT FOR US S#3 01901425 SCREW TR 4-10 FL 2 S

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RANK

Printer Assembly

– 68 –

20 01914031 SCREW TAT 4-12 PT-FL 5 S21 01914030 SCREW TAT 4-15 PT 5 S22 87299160 PULL TRACTOR UNIT PT-15XJ UPC 1 FOR US,LA :OPTION

87299190 PULL TRACTOR UNIT PT-15XJ JAN 1 EXC.FOR US,LA:OPTION- 89590183 ASF SF-15DJ US 1 FOR US,LA :OPTION

89590181 ASF SF-15DJ WG 1 FOR EC :OPTION89590180 ASF SF-15DJ UK 1 FOR UK,SC,TW :OPTION

#1 89590186 ASF SF-15DJ HK 1 FOR HK,SU :OPTION#2 89590185 ASF SF-15DJ AS 1 FOR AS :OPTION


– 69 –

2. Printer Mechanism

2-1. Disassembly Drawing

– 70 –

1 89131010 PRINT HEAD DP9305 1 S 2 *1 87060130 FRAME UNIT 935 1

#1 87060131 FRAME UNIT 935 1 NOTE1 3 87061110 CARRIAGE MOTOR UNIT 935 1 S 4 87067170 BAIL ROLLER SHAFT UNIT 935 1 S 5 83400650 BAIL LEVER L 935 1 S 6 *2 83400470 RELEASE LEVER 921 1 S

#2 83400471 RELEASE LEVER 921 1 S 7 83400670 SPRING HOLDER LEVER 935 2 8 *1 82401140 ADJUSTING LEVER 935 1

#1 82401141 ADJUSTING LEVER 935 1 9 82501100 HOLDER SPRING B 935 110 87063080 PLATEN UNIT B 935 1 S11 81370660 TRACTOR STAY 935 112 87066050 TRACTOR UNIT 935 1 S13 87067180 ROLLER HOLDER UNIT 935 4 S14 *1 87067190 RELEASE SHAFT UNIT 935 1 INCLUDES NO.34

#1 81380520 RELEASE SHAFT 935 1 NOT INCLUDE NO.3415 *3 87067030 TENSION LEVER UNIT 921 1

#3 87427020 TENSION LEVER UNIT 741 116 *1 80510860 SPRING E050-055-0358 2 S

*3 80510930 SPRING E056-060-0397 2 S#3 80510931 SPRING E056-060-0397 2 S

17 *1 80530570 GROUND CONTACT SPRING 921 1 S#1 80530571 GROUND CONTACT SPRING 921 1 S

18 *1 80530660 HOLDER SPRING 935 2 S#1 80530661 HOLDER SPRING 935 2 S

19 01902612 SCREW TAT 2.6-16 PT 2 S20 01903064 SCREW TAT 3-5 CT 1 S21 00830604 SCREW TR 3-6 2 S22 01903018 SCREW TR 3-6 WS/WF 1 S23 02040404 FLANGED NUT NHW4.0-S 1 S24 *2 02040403 TOOTHED NUT NHK4 4 S

#2 02020401 HEXAGON NUT NH4-2 4 S25 04020015 STOP RING SE3.0 1 S26 04020016 STOP RING SE4.0 1 S27 04991214 MINI CORD CLAMP UAMS-05-0 1 S28 04991230 MINI CORD CLAMP UAMS-05-SN 1 S29 04991232 MINI CORD CLAMP UAMS-05SN-W 2 S30 04991204 FASTENER T18S 3 S31 *1 82900772 RIBBON HOLDER 891 1 S

*2 82900773 RIBBON HOLDER 891 1 S#2 82902200 RIBBON HOLDER 935 1 S

32 #1 87060720 DETECTOR UNIT A ASSY 935 133 #1 01903073 SCREW TR 3-6 FL SPECIAL 134 *2 83100611 RELEASE GEAR 921 1

#2 83100612 RELEASE GEAR 921 135 #2 83400660 BAIL LEVER R 935 136 #2 87060270 CARRIAGE UNIT 935 137 #2 87060700 DETECTOR UNIT B ASSY 935 1

2-2. Parts ListPrinter Mechanism


Note 1: Frame unit includes drawing no. 9, 13, 14, 20, 27, 32, 33, 34, 35, 36 and 37.

– 71 –

6-1 *2 80086550 OPERATION SHEET SPECIAL LC-15 1 FOR SU#2 80087200 OPERATION SHEET NX-1500 SU 1 FOR SU

80086220 OPERATION SHEET NX-1500 1 EXCEPT FOR SU S6-2 *3 80081910 BRAND SEAL NX-1500 1 FOR NX-1500 S

#3 80081911 BRAND SEAL NX-1500 1 FOR NX-1500 S*3 80082500 BRAND SEAL LC-15 1 FOR LC-15 S#3 80082501 BRAND SEAL LC-15 1 FOR LC-15 S*3 80083640 BRAND SEAL LC-15 SU 1 FOR LC-15 SU#3 80083641 BRAND SEAL LC-15 SU 1 FOR LC-15 SU*3 80083650 BRAND SEAL LC-15 PL 1 FOR LC-15 PL#3 80083651 BRAND SEAL LC-15 PL 1 FOR LC-15 PL

6-3 87290810 CONTROL PANEL BD UNIT NX-1500 1 S6-4 01903038 SCREW TAT 3-10 PT-FL 3 S6-5 *2 83023400 UPPER CASE NX-1500 1

*3 83023401 UPPER CASE NX-1500 1#3 83025781 UPPER CASE XBL-15II 1

- *3 80992560 SHEET U1 NX-2415 1*3 80992570 SHEET U2 NX-2415 1*3 80992740 SHEET U3 NX-2415 1*3 80992800 SHEET U1 NX-1500 1

3. Sub-assembly

3-1. Upper Case Unit


– 72 –

3-1 *2 83023410 LOWER CASE NX-1500 1*3 83023411 LOWER CASE NX-1500 1#3 83023413 LOWER CASE NX-1500 1

3-2 82010900 BOARD CHASSIS NX-1500 13-3 82010910 POWER CHASSIS NX-1500 13-4 82501050 GROUND SPRING NX-1500 13-5 82901390 GROUND BRACKET NX-1500 13-6 80925381 MESHED GROUND WIRE 80-A 1 S3-7 *2 01903064 SCREW TAT 3-5 CT 1 S

*3 01903094 SCREW TAT 3-5 DT 1 S3-8 *3 00930803 SCREW TAT 3-8 PT 4 S

#3 00930803 SCREW TAT 3-8 PT 2 S3-9 *1 01914032 SCREW TAT 4-7 CT 3 S

*2 01914039 SCREW TAT 4-8 WS 3 S#2 01914034 SCREW TAT 4-8 CT-WF 3 S

3-10 80086480 CAUTION SEAL LC-10II SC 1 FOR SC ONLY- *3 80992810 SHEET L1 NX-1500 1

*3 80992820 SHEET L2 NX-1500 1*3 80992830 SHEET L3 NX-1500 1*3 80992840 SHEET L4 NX-1500 1*4 80992850 SHEET L5 NX-1500 1#4 80992851 SHEET L5 NX-1500 1*4 80992860 SHEET L6 NX-1500 1#4 80992861 SHEET L6 NX-1500 1


3-2. Lower Case Unit

– 73 –

16-1 *2 83023450 INTERFACE COVER NX-1500 1*3 83024920 INTERFACE COVER ZB-15 1#3 83024921 INTERFACE COVER ZB-15 1

16-2 87297030 PARALLEL IF BOARD UNIT NX-1500 1 S87299260 SERIAL I/F BOARD UNIT X15 1 EXCEPT FOR HK:OPTION87299270 SERIAL I/F BOARD UNIT X15 HK 1 FOR HK :OPTION

16-3 01903064 SCREW TAT 3-5 CT 1 S16-4 01903038 SCREW TAT 3-10 PT-FL 2 S

3-3. Interface Cartridge Unit


– 74 –

22- 1 87299340 FRAME R UNIT PT-15X 122- 2 87299350 FRAME L UNIT PT-15X 122- 3 83023560 TRACTOR COVER R PT-15X 122- 4 83023570 TRACTOR COVER L PT-15X 122- 5 83200090 BUSHING 848 222- 6 83101140 GEAR 32X0.5 PT-15X 122- 7 80906030 TRACTOR UNIT R 905 122- 8 80906040 TRACTOR UNIT L 905 122- 9 *3 83911060 SHEET GUIDE 905 2

#3 83911061 SHEET GUIDE 905 222-10 *3 81360640 TRACTOR SHAFT PT-15X 1

#3 81360641 TRACTOR SHAFT PT-15X 122-11 81370670 TRACTOR STAY PT-15X 222-12 80530750 PAPER GUIDE PT-15X 122-13 01902609 SCREW TAT 2.6-5 PT 622-14 02440401 WAVE WASHER WW4X8X0.2X1.5H 422-15 02040301 FLANGED NUT NHW3 422-16 04020017 STOP RING SE5.0 222-17 04020015 STOP RING SE3.0 122-18 80082570 BRAND SEAL PT-15XJ 122-19 83023620 PRINTER COVER PT-15X 1

3-4. Pull Tractor Unit (option)


– 75 –

3-5. Frame Unit

– 76 –

36-1 83910901 GEAR COVER 921 1 S36-2 83902300 CARD HOLDER 935 1 S36-3 *2 83902320 CARRIAGE 935 1

*2 83902321 CARRIAGE 935 1#2 87060471 CARRIAGE ASSY 935 1 INCLUDES NO.36-7

36-4 81210310 BUSHING 4X5X4.5 921 236-5 80902140 TIMING BELT HTD102 524X4.8 136-6 *3 80203010 REAR SLIDER 921 1 S

#3 80203011 REAR SLIDER 921 1 S36-7 *2 80210470 BUSHING 14X16X10 2 S36-8 83120470 RIBBON CASSETTE GEAR 921 1 S36-9 83100592 IDLER GEAR 70X0.3 2 S36-10 83100600 IDLER GEAR 16X1-40 1 S36-11 82501020 CLUTCH LEVER SPRING 921 1 S36-12 02303025 POLY-SLIDER WP3X0.25 1 S36-13 83100541 IDLER GEAR 17X41X0.3 1 S36-14 04020002 STOP RING SE1.5 1 S36-15 87412910 CLUTCH PLATE ASSY 102 1 S2-16 87060730 PAPER FEED MOTOR ASSY 935 1 S2-17 87060740 PF MOTOR PLATE ASSY 935 1 S2-18 *1 87060750 CLUTCH SHAFT ASSY 935 1 S

#1 87060751 CLUTCH SHAFT ASSY 935 1 NOT INCLUDE NO.2-29 S2-19 83200490 BUSHING F7X16X6.5 12-20 80520640 SPRING C080-035-0216 12-21 02307050 POLY-SLIDER WP7X0.5 12-22 83100520 IDLER GEAR 16X72X0.5 12-23 83100510 GEAR 40X0.5 12-24 83101100 IDLER GEAR 24X40X0.5 935 1 S2-25 01903064 SCREW TAT 3-5 CT 2 S2-26 01903031 SCREW TR 3-6 FL 32-27 04020010 STOP RING SE2.0 1 S2-28 04020017 STOP RING SE5.0 12-29 #1 83101090 GEAR 22X1.0 935 1

Frame Unit


– 77 –

3-6. Tractor Unit

12-1 83901620 TRACTOR HOLDER R 891 1 S12-2 83901631 TRACTOR HOLDER L 891 1 S12-3 *3 81360620 TRACTOR SHAFT 935 1

#3 81360622 TRACTOR SHAFT 935 112-4 81370660 TRACTOR STAY 935 112-5 83110110 SPROCKET WHEEL 891 2 S12-6 83400311 CLAMP LEVER R 831 1 S12-7 83400321 CLAMP LEVER L 831 1 S12-8 *3 83901600 SHEET GUIDE 891 2

#3 83901601 SHEET GUIDE 891 212-9 83910861 TRACTOR COVER R 891 1 S12-10 83910871 TRACTOR COVER L 891 1 S12-11 83110100 TRACTOR CLUTCH 891 1 S12-12 83100530 TRACTOR GEAR 64X0.5 1 S12-13 83200700 TRACTOR BUSHING 905 212-14 02307050 POLY-SLIDER WP7X0.5 2 S12-15 *3 80520350 SPRING C090-070-0130 1 S

#3 80520351 SPRING C090-070-0130 1 S12-16 04020017 STOP RING SE5.0 3 S

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RAN

– 78 –

10-1 *3 80202140 PLATEN B 935 110-1 #3 80202141 PLATEN B 935 110-2 83100550 PLATEN GEAR A 891 2 S10-3 83100560 PLATEN GEAR B 891 1 S10-4 83902310 PLATEN HOLDER 935 210-5 80530520 PLATEN GEAR SPRING 891 1 S10-6 *1 04020014 STOP RING SE6.0 3 S

#1 04020022 STOP RING SE6.0-SUS 3 S10-7 04012502 ROLL PIN SP2.5X12 310-8 #2 87063340 PLATEN GEAR ASSY 891B 1 WITH 10-2,3,5 S

3-7. Platen Unit


– 79 –

4. Wiring Scheme of The Printer

– 80 –

5. Main logic board

5-1. Circuit Diagram

– 81 –

– 82 –

– 83 –

– 84 –

5-2. Component Layout(Main Logic Board)

– 85 –

5-3. Parts ListMain Logic Board

IC1 08210052 TTL IC 74LS374P 1IC2 08200109 IC-RESET M51953BL 1 SIC3 08210017 TTL IC 74LS05 1IC4 08240020 GATE ARRAY MB623153U-XL 1 SIC5 08222026 EPROM 27256-150NS 1 XL15.**.C :EXC. SU,PL S

#1 08222026 EPROM 27256-150NS 1 XL15.**.SUCG :FOR SU S#2 08222026 EPROM 27256-150NS 1 XL15.**.PLCG :FOR PL S

IC6 08220116 EPROM 27512-150NS 1 XL15.**.M SIC7 08221007 PSRAM HM65256BLP-100NS 1 SIC8 08210038 TTL IC 74LS373 1IC9 08250001 CPU M50734SP-10 1 SIC201 08202008 IC-REG L4960 1 SIC202 *2 08202003 IC-REG PQ05R041 1 S

#2 08202024 IC-REG PQ05RF11 1 STA1 07650033 TRANSISTOR ARRAY STA302A 1 STA2 *1 07650031 TRANSISTOR ARRAY STA401A 1 S

#1 07650040 TRANSISTOR ARRAY MP4101 1 STA3 07650034 TRANSISTOR ARRAY STA405A 1 STR1 07011752 TRANSISTOR 2SA1266* 1TR2-7 07227853 TRANSISTOR 2SC1740SE 6TR8-16 07320411 TRANSISTOR 2SD2041 9 STR201 07319441 TRANSISTOR 2SD1944JK 1D1 08000039 DIODE 1S1588 1D2-4 08000044 DIODE 1SR139-100AT 3D201 08030016 SCHOTTKY DIODE ERB84-009 1 SZD201 08020023 ZENER DIODE RD5.6EB1 1RA1 06584723 RESIS. ARRAY 4.7K-OHM 1/8W 8EL 1RA2 06581823 RESIS. ARRAY 1.8K-OHM 1/8W 6EL 1RA3 NOT MOUNTEDRA4 06584724 RESIS. ARRAY 4.7K-OHM 1/8W 5EL 1RA5 06581022 RESIS. ARRAY 1 K-OHM 1/8W 9EL 1RA6-7 NOT MOUNTEDRA8 06584721 RESIS. ARRAY 4.7K-OHM 1/8W 4EL 1RA9 06584723 RESIS. ARRAY 4.7K-OHM 1/8W 8EL 1R1 06051034 RD RESISTOR 10 K-OHM 1/6W 1R2 06052224 RD RESISTOR 2.2 K-OHM 1/6W 1R3 06051034 RD RESISTOR 10 K-OHM 1/6W 1R4-10 06054725 RD RESISTOR 4.7 K-OHM 1/6W 7R11 06051525 RD RESISTOR 1.5 K-OHM 1/6W 1R12 06051815 RD RESISTOR 180 OHM 1/6W 1R13-20 06054725 RD RESISTOR 4.7 K-OHM 1/6W 8R21 06051014 RD RESISTOR 100 OHM 1/6W 1R22-25 06054725 RD RESISTOR 4.7 K-OHM 1/6W 4R26 06051025 RD RESISTOR 1 K-OHM 1/6W 1R27-29 06054725 RD RESISTOR 4.7 K-OHM 1/6W 3R30 06051051 RD RESISTOR 1 M-OHM 1/6W 1R31 NOT MOUNTEDR32-35 06051025 RD RESISTOR 1 K-OHM 1/6W 4R36 06056824 RD RESISTOR 6.8 K-OHM 1/6W 1R37 06051034 RD RESISTOR 10 K-OHM 1/6W 1R38 06056824 RD RESISTOR 6.8 K-OHM 1/6W 1R39-42 06051025 RD RESISTOR 1 K-OHM 1/6W 4R43-44 06054324 RD RESISTOR 4.3 K-OHM 1/6W 2% 2R45-46 06051124 RD RESISTOR 1.1 K-OHM 1/6W 2% 2R47-48 06054725 RD RESISTOR 4.7 K-OHM 1/6W 2R49 06251034 RN RESISTOR 10 K-OHM 1/6W 1R50 06054725 RD RESISTOR 4.7 K-OHM 1/6W 1


– 86 –

Main Logic Board

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RANKR51 06054734 RD RESISTOR 47 K-OHM 1/6W 1R52 06051034 RD RESISTOR 10 K-OHM 1/6W 1R53-61 06053314 RD RESISTOR 330 OHM 1/6W 9R62 06051514 RD RESISTOR 150 OHM 1/6W 1R63-64 06052214 RD RESISTOR 220 OHM 1/6W 2R65-67 06051034 RD RESISTOR 10 K-OHM 1/6W 3R68 06200274 RN RESISTOR 2.7 OHM 2W 2% 1R69 06053314 RD RESISTOR 330 OHM 1/6W 1R70-71 06043315 RD RESISTOR 330 OHM 1/4W 2R72-73 06053314 RD RESISTOR 330 OHM 1/6W 2R201-202 06041035 RD RESISTOR 10 K-OHM 1/4W 2R203 06241932 RN RESISTOR 19.1 K-OHM 1/4W 1R204 06244722 RN RESISTOR 4.75 K-OHM 1/4W 1R205 06041025 RD RESISTOR 1 K-OHM 1/4W 1CA1 NOT MOUNTEDCA2 *1 05652212 CAPA. ARRAY 220PF 50V 8EL 1

#1 05651012 CAPA. ARRAY 100PF 50V 8EL 1CA3 *1 NOT MOUNTED

#1 05652212 CAPA. ARRAY 220PF 50V 8EL 1C1 05024764 CHEM. CAPA. 47UF 16V 1C2 05152234 CERA. CAPA. 0.022UF 50V 1C3-5 05151015 CERA. CAPA. 100PF 50V 3C6 NOT MOUNTEDC7 05131044 CERA. CAPA. 0.1UF 25V 1C8 05152234 CERA. CAPA. 0.022UF 50V 1C9 NOT MOUNTEDC10 05131044 CERA. CAPA. 0.1UF 25V 1 EXCEPT FOR HK

NOT MOUNTED :FOR HKC11 *2 NOT MOUNTED

#2 05152234 CERA. CAPA. 0.022UF 50V 1C12 05154714 CERA. CAPA. 470PF 50V 1C13 *1 05151015 CERA. CAPA. 100PF 50V 1

*2 05151014 CERA. CAPA. 100PF 50V 1#2 05151015 CERA. CAPA. 100PF 50V 1

C14 05154723 CERA. CAPA. 4700PF 50V 1C15 05152234 CERA. CAPA. 0.022UF 50V 1C16-17 NOT MOUNTEDC18 05131044 CERA. CAPA. 0.1UF 25V 1C19 05151033 CERA. CAPA. 0.01UF 50V 1C20-21 NOT MOUNTEDC22 05151015 CERA. CAPA. 100PF 50V 1C23-26 05532234 CAPACITOR 0.022UF 25V 4C27 05154714 CERA. CAPA. 470PF 50V 1C28-29 05291052 FILM CAPA. 1UF 100V 2C30-32 05152234 CERA. CAPA. 0.022UF 50V 3C33-34 05532234 CAPACITOR 0.022UF 25V 2C35 05152234 CERA. CAPA. 0.022UF 50V 1C36 NOT MOUNTEDC37 05252233 FILM CAPA. 0.022UF 50V 1 EXCEPT FOR HK

NOT MOUNTED :FOR HKC201 05054782 CHEM. CAPA. 4700UF 50V 1C202 05155614 CERA. CAPA. 560PF 50V 1C203 05252222 FILM CAPA. 2200PF 50V 1C204 05154714 CERA. CAPA. 470PF 50V 1C205 05251043 FILM CAPA. 0.1UF 50V 1C206 05043385 CHEM. CAPA. 3300UF 35V 1

– 87 –

C207 05024781 CHEM. CAPA. 4700UF 16V 1C208 05152231 CERA. CAPA. 0.022UF 50V 1C209-210 05022271 CHEM. CAPA. 220UF 16V 2DB201-202 *1 08990217 DIODE STACK RBA-401 2

*4 08990220 DIODE STACK D3SB10 2#4 08990227 DIODE STACK D3SB20 2

XTAL1 09250035 CERA. OSCILLATOR CST10.0MT 1BZ1 45060201 QMB-111P 1DSW1 *3 09090026 DIP SWITCH 51D08015 1

#3 09090046 DIP SWITCH EAH108L-BLK 1DSW2 09090032 DIP SWITCH 51D0401S 1F201-202 09990054 FUSE 5TT3A 125V 2 US,UK,AS,TW,LA,HK S

09990050 FUSE EAK3.15A 250V 2 FOR EC,SC,SU,PL SL201 09251023 CHOKE COIL SK15BS045-300 1CN1 09100328 CONNECTOR AKD-30DLFD 1CN2 *1 09100342 CONNECTOR 53014-0410 1

*3 09100476 CONNECTOR 53014-0470 1#3 09100342 CONNECTOR 53014-0410 1

CN3 09100416 CONNECTOR HLEM18S-2 1CN4 09100426 CONNECTOR 53014-1010 1CN5 09100267 CONNECTOR 5483-06A 1CN6 09100278 CONNECTOR 5483-06A-RED 1CN7 09100384 CONNECTOR HLEM15S-2 1CN201 09100036 CONNECTOR 5287-04A 1FG1 *4 80700800 WIRE 18UL1007BLK100T 1

#3 87770140 CABLE UNIT 01X100T (D) 1JC1 NOT MOUNTEDJC2 93930006 JUMPER WIRE STP122 1JC3 NOT MOUNTEDJC4 93930006 JUMPER WIRE STP122 1J1 93930006 JUMPER WIRE STP122 1J2 NOT MOUNTEDJ3-18 93930006 JUMPER WIRE STP122 16J19 NOT MOUNTEDJ20 93930006 JUMPER WIRE STP122 1J21 NOT MOUNTEDJ22-43 93930006 JUMPER WIRE STP122 22J44-45 NOT USEDJ46-55 93930006 JUMPER WIRE STP122 10J56-57 NOT USEDJ58-117 93930006 JUMPER WIRE STP122 60J201-205 93930006 JUMPER WIRE STP122 5- *3 80086510 BOARD ID SEAL HK 1 FOR HK ONLY

Main Logic Board


– 88 –

6. Control Panel Board


– 89 –

6-2. Component Layout

6-3. Parts ListControl Panel Board

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RANKR1-2 06042715 RD RESISTOR 270 OHM 1/4W 2R3 NOT MOUNTEDR4-11 06042715 RD RESISTOR 270 OHM 1/4W 8LED1 08300055 LED LT-1H11A 1LED2 08300058 LED LT-1E21A 1LED3 NOT MOUNTEDLED4-10 08300058 LED LT-1E21A 7LED11 08300055 LED LT-1H11A 1SW1-5 09010043 PUSH SWITCH SKHHAL=S 5CN1 09100427 CONNECTOR FC-18 1J1-4 93930006 JUMPER WIRE STP122 4

– 90 –

C1 05291042 FILM CAPA. 0.1UF 250V 1C2-3 05192224 CERA. CAPA. 2200PF 400V 2 EXCEPT FOR HK,SU

NOT MOUNTED :HK,SUL1 09251106 LINE FILTER SU10V-05050 1F1 09990058 FUSE 5TT1A 250V 1 FOR US,TW S

09990021 FUSE EAWK630MA 250V 1 EXCEPT FOR US,TW SSW 09030010 SEESAW SWITCH WK2A44 1- *3 09240580 TRANSFORMER 120V XL-15SWD US 1 FOR US,TW

#3 09240841 TRANSFORMER 120V ZL-10W US 1 FOR US,TW*3 09240590 TRANSFORMER 220V XL-15SWD EC 1 EC,HK,SC,SU,LA,PL#3 09240850 TRANSFORMER 220V ZL-10 EC 1 EC,HK,SC,SU,LA,PL*3 09240600 TRANSFORMER 240V XL-15SWD UK 1 FOR UK,AS#3 09240860 TRANSFORMER 240V ZL-10 UK 1 FOR UK,AS*3 09110065 CORD SET US-PN SPT LC 1 FOR US,TW*4 09110065 CORD SET US-PN SPT LC 1 FOR TW*4 09110144 CORD SET US-PN HA-10 1 FOR US#4 09110144 CORD SET US-PN HA-10 1 FOR US,TW*3 09110078 CORD SET EC-PN XBL 1 FOR EC,SC,LA,PL*4 09110078 CORD SET EC-PN XBL 1 FOR SC,LA,PL#4 09110143 CORD SET EC-PN HA-10 1 FOR SC,LA,PL*2 09110078 CORD SET EC-PN XBL 1 FOR SU#2 09110060 CORD SET SV-PN L=2M 1 FOR SU

09110067 CORD SET UK-PN LC 1 FOR UK09110068 CORD SET AS-PN LC 1 FOR AS

*3 09110069 CORD SET HK-PN LC 1 FOR HK#3 09110136 CORD SET HK-PN QBA 1 FOR HK

82020280 POWER CORD COVER NX-1000 104991219 CORD BUSHING SR-4N-4 1 FOR US,TW,SU04991220 CORD BUSHING SR-5N-4 1 EC,UK,AS,HK,SC,LA,PL

7. Fuse Board




7-3. Parts List

– 91 –

8. Parallel Straight Board


– 92 –


8-3. PartsListParallel Straight Board

R1 06041521 RD RESISTOR 1.5 K-OHM 1/4W 1CN1 09100155 CONNECTOR 57L-40360-770B-D147 1CN2 09100327 CONNECTOR AKD-30DLMDB2R 1J1-2 93930001 JUMPER WIRE STP123 2J3 NOT MOUNTEDJ4 93930001 JUMPER WIRE STP123 1F1 #1 93930001 JUMPER WIRE STP123 1 P=15mm


[Old Board] [New Board]

– 93 –

9. Serial Buffer Board (option)]


– 94 –


[Old Board]

[New Board]

– 95 –

9-3. Parts ListSerial Buffer Board

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RANKIC1 *2 08220102 CPU HD63A03YF 1

#2 08250011 MASKED CPU HD63B01YF-IF 1 IC6 IS NOT MOUNTEDIC2 NOT MOUNTEDIC3 08210112 TTL IC 74LS00 (FLAT TYPE) 1IC4 08200126 IC-I/F LT1081CS 1IC5 08200127 IC-I/F MC34051M 1IC6 *2 08220090 EPROM 2764-200NS 1 X.**.OPB

#2 NOT MOUNTEDIC7 *1 08221011 SRAM TC5564AFL-150NS 1

#1 08221016 SRAM M5M5165FP-12 1RA1 06584723 RESIS. ARRAY 4.7K-OHM 1/8W 8EL 1R1-3 06781032 CHIP RESISTOR 10 K-OHM 1/8W 3R4 06783324 CHIP RESISTOR 3.3 K-OHM 1/8W 1R5 #1 06051036 RD RESISTOR 10 K-OHM 1/6W (W) 1CA1-3 05652212 CAPA. ARRAY 220PF 50V 8EL 3C1 05731042 CERA. CAPA. CHIP 0.1UF 25V 1 EXCEPT FOR HK

NOT MOUNTED :FOR HKC2 05021066 CHEM. CAPA. 10UF 16V 1C3-4 05732211 CERA. CAPA. CHIP 220PF 25V 2C5-6 05752201 CERA. CAPA. CHIP 22PF 50V 2C7-10 05034755 CHEM. CAPA. 4.7UF 25V 4C11 05731042 CERA. CAPA. CHIP 0.1UF 25V 1C12 NOT MOUNTEDC13 05731042 CERA. CAPA. CHIP 0.1UF 25V 1C14 05732211 CERA. CAPA. CHIP 220PF 25V 1C15-16 05731042 CERA. CAPA. CHIP 0.1UF 25V 2C17 NOT MOUNTEDC18-21 05731042 CERA. CAPA. CHIP 0.1UF 25V 4C22 05731042 CERA. CAPA. CHIP 0.1UF 25V 1 EXCEPT FOR HK

NOT MOUNTED :FOR HKC23 NOT MOUNTEDDSW1 09090018 DIP SWITCH KSD08 1XTAL1 09250029 CERA. OSCILLATOR CSA4.91MG 1CN1 09100337 CONNECTOR DBLC-J25SAF-23L6 1CN2 09100327 CONNECTOR AKD-30DLMDB2R 1JP1 93930001 JUMPER WIRE STP123 1 L=5mmJP2-3 09000037 SLIDE SWITCH SSSS212 2JP4 NOT MOUNTEDJP5-6 93930001 JUMPER WIRE STP123 2 L=5mm- *3 80086510 BOARD ID SEAL HK 1 FOR HK ONLY

– 96 –

10. Parallel Buffer Board (option)

10-1.Circuit Diagram

– 97 –

10-2.Component Layout

– 98 –

10-3.Parts ListParallel Buffer Board

DRWG.NO. REV. PARTS NO. PARTS NAME Q'TY REMARKS RANKIC1 08250011 MASKED CPU HD63B01YF-IF 1IC2 NOT MOUNTEDIC3 08221033 PSRAM TC518128AFL-80 1IC4 08210113 TTL IC 74LS05 (FLAT TYPE) 1IC5-6 08210112 TTL IC 74LS00 (FLAT TYPE) 2IC7 08210114 TTL IC 74LS112 (FLAT TYPE) 1IC8 NOT MOUNTEDTR1 NOT MOUNTEDR1 06751021 CHIP RESISTOR 1 K-OHM 1/10W 1R2 06781011 CHIP RESISTOR 100 OHM 1/8W 1R3-4 06782021 CHIP RESISTOR 2 K-OHM 1/8W 2R5-12 06754721 CHIP RESISTOR 4.7 K-OHM 1/10W 8R13-14 06781824 CHIP RESISTOR 1.8 K-OHM 1/8W 2R15 06754721 CHIP RESISTOR 4.7 K-OHM 1/10W 1R16-17 NOT MOUNTEDR18-19 06751031 CHIP RESISTOR 10 K-OHM 1/10W 2R20-22 06781812 CHIP RESISTOR 180 OHM 1/8W 3R23-25 06751031 CHIP RESISTOR 10 K-OHM 1/10W 3R26 06781011 CHIP RESISTOR 100 OHM 1/8W 1R27 06751031 CHIP RESISTOR 10 K-OHM 1/10W 1R28 06781812 CHIP RESISTOR 180 OHM 1/8W 1RA1 06584723 RESIS. ARRAY 4.7K-OHM 1/8W 8EL 1C1 05731041 CERA. CAPA. CHIP 0.1UF 25V 1 EXCEPT FOR HK

#2 NOT MOUNTED:FOR HKC2 05022261 CHEM. CAPA. 22UF 16V 2C3 05731041 CERA. CAPA. CHIP 0.1UF 25V 1C4 05732211 CERA. CAPA. CHIP 220PF 25V 1C5-6 05752201 CERA. CAPA. CHIP 22PF 50V 2C7-8 NOT MOUNTEDC9 05731041 CERA. CAPA. CHIP 0.1UF 25V 1 EXCEPT FOR HK

#2 NOT MOUNTED:FOR HKC10 05753004 CERA. CAPA. CHIP 30PF 50V 1C11-12 NOT USEDC13-15 05731041 CERA. CAPA. CHIP 0.1UF 25V 3C16 NOT MOUNTEDC17-20 05731041 CERA. CAPA. CHIP 0.1UF 25V 4C21-23 05732211 CERA. CAPA. CHIP 220PF 25V 3C24 05551045 CAPACITOR 0.1UF 50V (W) 1CA1-3 05652212 CAPA. ARRAY 220PF 50V 8EL 3F1 09990066 FUSE PICOII 0.5A-125V 1XTAL1 09250027 CERA. OSCILLATOR KBR8.0MHZ 1CN1 09100155 CONNECTOR 57L-40360-770B-D147 1CN2 09100327 CONNECTOR AKD-30DLMDB2R 1JW1 80924700 WIRE 26UL1007BLK060 1JW2 80700440 WIRE 28UL1007BLK035 1JP1 09000037 SLIDE SWITCH SSSS212 1JP2 93930006 JUMPER WIRE STP122 1 L=14mmJP3-5 NOT MOUNTEDJP6 09000037 SLIDE SWITCH SSSS212 1JP7-8 93930006 JUMPER WIRE STP122 2 L=14mm

– 99 –

11. Waveform with Oscilloscope

(1) Crystal (10 MHz) (2) RESET (Power on reset)

Crystal Pin 33 of IC9 Upper : RESET input Pin 4 of IC2Time/Div : 0.2 µs Lower : RESET output Pin 5 of IC2Volt/Div : 1V Time/Div : 10 ms

Volt/Div : 2V

(3) Protection Circuit (4) Head Energizing Control Signal

Upper : RESET Pin 5 of IC2 Upper : HD-EN Pin 39 of IC4Lower : WD OUT Pin 59 of IC9 Lower : HD1 Data Pin 44 of IC4

Time/Div : 5 ms Time/Div : 0.1 msVolt/Div : Upper 2V Volt/Div : 2V

Lower 1V

(5) Print Head Control Signal and Waveform (6) Carriage Motor Common Control Signal andDiving Signal

Upper : HD1 Dara Pin 44 of IC4 Upper : CR-CMN Control Signal Pin 34 of IC4Lower : HD1 Pin 1 of CN7 Lower : CR-CMN Driving Signal Pin 3 of CN5

Time/Div : 0.5 ms Time/Div : 0.5 msVolt/Div : Upper 5V Volt/Div : Upper 1V

Lower 20V Lower 10V

– 100 –

(7) Carriage Motor Control Signal and Driving Signal (8) Paper Feed Motor Common Control Signal and DrivingSignal

Upper : Carriage-ø1 Control Signal Pin 13 of IC9 Upper : LF-CMN Control Signal Pin 22 of IC9Lower : Carriage-ø1 Driving Signal Pin 3 of CN5 Lower : LF-CMN Driving Signal Pin 1 of CN6

Time/Div : 1 ms Time/Div : 20 msVolt/Div : Upper 2V Volt/Div : Upper 2V

Lower 20V Lower 10V

(9) Paper Feed Motor Control Signal and (10)Parallel InterfaceDriving Signal

Upper : LF-ø1 Control Signal Pin 17 of IC9 Upper : STB Pin 1 of CN1Lower : LF-ø1 Driving Signal Pin 3 of CN6 Lower : BUSY Pin 17 of CN1

Time/Div : 5 ms Time/Div : 50 msVolt/Div : Upper 2V Volt/Div : Upper 5V

Lower 20V Lower 2V

Printed in Japan, 80823322-ALC15

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