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DOT MATRIX PRINTER
NX-1500 LC-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 forbidden. · 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 any errors be detected, STAR would greatly appreciate being informed of them. · The above notwithstanding, STAR can assume no responsibility for 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 NX-1500 MULTI-FONT LC-15 MULTI-FONT Destination For American and Asian market For European and Pacific market
· This manual is divided into the following sections:
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 General Specifications Theory of Operation Adjustments Parts Replacement Maintenance and Lubrication Troubleshooting Parts List : : : : : Sep. 1989 Apr. 1991 Aug. 1993 Sep. 1995 Apr. 1996
· First edition
Second edition Third edition Fourth edition Fifth edition
1 2 3 4 5 6 7
CHAPTER 1 GENERAL SPECIFICATIONS
1. 2. 3. 4.
General Specifications ......................................................................................... 3 External Appearance and Composition .............................................................. 5 DIP Switch Settings .............................................................................................. 6 Parallel Interface ................................................................................................... 7
4-1. 4-2. General Specifications ........................................................................................... 7 Connector Signals .................................................................................................. 7
5.
Serial Interface (option) ........................................................................................ 8
5-1. 5-2. 5-3. General Specifications ........................................................................................... 8 Connector Signals .................................................................................................. 8 DIP Switch Settings ................................................................................................ 9
1 2 3 4 5 6 7
GENERAL SPECIFICATIONS
2
GENERAL SPECIFICATIONS 1. General Specifications
Serial Impact Dot-matrix 150cps (Draft pica) 37.5cps (NLQ pica) Bidirectional, logic-seeking Unidirectional, logic-seeking (selectable) 9 pins 1/6, 1/8, n/72, n/216 inches Standard: Friction and push tractor Option: Pull tractor 2.8 inches/second max. 96 3 sets *1 (For NX-1500 SU, LC-15 SU)/14 sets *2 (Others) 111 50 255
Print system Printing speed Print direction Print Head Line spacing Paper feed Paper feed speed Character set ASCII Code table (International) IBM special IBM block graphic Download
*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 Pica Elite Condensed pica Condensed elite Proportional Character dot matrix Bit image dot-matrix 8-pin single 8-pin double 8-pin high-speed double* 8-pin quadruple 8-pin CRT I 8-pin CRT II 8-pin plotter 8-pin double-plotter 9-pin single 9-pin double
CPI 10 12 17.1 20 9 × 11 18 × 23 DPI 60 120 120 240 80 90 72 144 60 120
Columns 136 163 233 272 Variable (Draft) (NLQ) 8 8 8 8 8 8 8 8 9 9 × × × × × × × × × × 816 1632 1632 3264 1088 1224 976 1958 816 1632
* It is impossible to print adjacent dots in the modes marked with an asterisk (*).
Paper width Cut sheet Fanfold(continuous) Copies
6" ~ 16.5" 4" ~ 16" Original + 2 copies
3
GENERAL SPECIFICATIONS
Maximum buffer size Without Download With Download Emulations Interface Ribbon type Ribbon life Dimensions Weight Power supply Options
15KB 1 line Epson mode IBM proprinter mode Standard: Centronics parallel Option: RS-232C serial On-carriage, dedicated Black 3 million characters (draft pica) 590(w) × 332(d) × 127(h)mm 23.2(w) × 13.1(d) × 5(h)in 8.5 kg (18.7 lb) 120VAC, 220VAC, 240VAC, 50/60Hz (varies according to the country of purchase) Automatic sheet feeder Serial interface board(RS-232C) Pull tractor feed
Fig. 1-1 External dimensions
4
GENERAL SPECIFICATIONS 2. External Appearance and Composition
Fig. 1-2 Front View of the Printer
Fig. 1-3 Diagram of Internal Composition 5
GENERAL SPECIFICATIONS 3. DIP Switch Settings
3-1. For NX-1500 SU, LC-15 SU
Switch 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 2-1 2-2 2-3 2-4 Function Page length Auto CR Character Set Auto sheet feeder Paper-out detector Emulation mode Character set Auto LF Usage of RAM Italic ESC 4/ESC 5 (*1) IBM code page ON 11 inches Yes Gost Inactive Enabled Standard Set #1 No Buffer OFF Italic IBM-Russian OFF 12 inches No Other (See 2-4) Active Disabled IBM Set #2 Yes Download ON MSB #866
*1 The switch 2-3 is valid only in the standard emulation mode.
3-2. Others
Switch 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 2-1 2-2 2-3 2-4 International character sets: Country U.S.A. France Germany England 2-2 ON OFF ON OFF 2-3 ON ON OFF OFF 2-4 ON ON ON ON Country Denmark I (*2) Sweden Italy Spain I 2-2 ON OFF ON OFF 2-3 ON ON OFF OFF 2-4 OFF OFF OFF OFF Function Page length Auto CR Printing area Auto sheet feeder Paper-out detector Printer mode Character set (Standard mode) Character set (IBM mode) Auto LF Usage of RAM International character set ON 11 inches Yes A type Inactive Enabled Standard Italics Set #2 No Buffer OFF 12 inches No B type Active Disabled IBM Graphics Set #1 Yes Download
*2 Denmark/Norway when switch 1-6 is OFF and switch 1-7 is ON.
6
GENERAL SPECIFICATIONS 4. Parallel Interface
4-1. General Specifications
Item Synchronization System I/F Protocol Logic Level Specifications Via externally supplied STROBE pulses By ACK and BUSY signals Compatible with TTL level
Fig. 1-4 Timing Charts of Parallel Interface
4-2. Connector Signals
Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14,15 16 17 18 19 ~ 30 31 32 33 34,35 36 Signal Name STROBE DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7 ACK BUSY PAPER SELECT NC SIGNAL GND CHASSIS GND +5V GND RESET ERROR EXT GND NC SELECT IN Function Description Goes from high to low (for 0.5µs) when active High when active High when active High when active High when active High when active High when active High when active High when active 9µs low pulse acknowledges receipt of data Low when printer ready to receive data. High when paper out. Can be disabled with Memory Switch setting. High when printer is on-line Unused Signal ground Chassis ground (isolated from signal ground) +5V DC output from printer Twisted pair ground return When this input signal is low, printer is reset Outputs low when printer cannot continue, due to an error External ground Unused Always high 7
GENERAL SPECIFICATIONS 5. Serial Interface (option)
5-1. General Specifications
Item Interface Synchronization System Baud rate Word length Start bit: Data bit: Parity bit: Stop bit: Signal polarity Mark: Space: Handshaking RS-232C level Asynchronous 150-19,200 bit per second (BPS) [selectable] 150, 300, 600, 1200, 2400, 4800, 9600, 19200BPS 1 bit 7 or 8 bits (selectable) Odd, Even or None (selectable) More then 1 bit length Logic "1" (3V to 15V) Logic "0" (+3V to +15V) DTR XON/XOFF ETX/ACK 8KB (standard) Specifications
Data buffer
5-2. Connector Signal and Functional Descriptions
Pin No. 1 2 3 4 5 6 7 8-10 11 12 13 14-19 20 21-25 Signal name GND TXD RXD RTS CTS NC GND NC RCH NC GND NC DTR NC -- Direction -- OUT IN OUT -- Function Printer's chassis ground. This pin carries data from the printer. This pin carries data to the printer. Always space. This pin is Space when the computer is ready to send data. This printer does not check this pin. Unused. Signal ground. Unused. This printer turns this pin Space when it is ready to receive data. This line carries the same signal as pin 20. Unused. Signal ground. Unused. The printer turns this pin Space when it is ready to receive data. Unused.
OUT
-- OUT
8
GENERAL SPECIFICATIONS
5-3. DIP Switch Settings
Switch 1 2 3 4 5 6 ON 8 data bits No parity OFF 7 data bits Parity checked
Handshaking protocols -- see table below Odd parity Even parity
7 Data transfer rate -- see table below 8 All switches are set ON when the printer leaves the factory. Protocol DTR mode XON/XOFF mode ETX/ACK mode Baud rate 150 300 600 1200 2400 4800 9600 19200 Switch 6 OFF OFF OFF OFF ON ON ON ON Switch 3 ON ON OFF Switch 7 OFF OFF ON ON OFF OFF ON ON Switch 4 ON OFF ON Switch 8 OFF ON OFF ON OFF ON OFF ON
9
GENERAL SPECIFICATIONS
10
CHAPTER 2 THEORY OF OPERATION
1. 2.
Block Diagram ..................................................................................................... 13 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. 2-4. 2-5. Reset Circuit .......................................................................................................... 23 Reset by +5V Line Voltage Detection .................................................................. 24 Protection Circuit .................................................................................................. 24
1 2 3 4 5 6 7
3. 4.
Power Supply Unit .............................................................................................. 24 Mechanisms ......................................................................................................... 25
4-1. 4-2. 4-3. 4-4. 4-5. Print Head Mechanism .......................................................................................... 25 Print Head Carrying Mechanism .......................................................................... 25 Ink Ribbon Feed Mechanism ................................................................................ 26 Paper Feed Mechanism ........................................................................................ 27 Detectors ............................................................................................................... 28
THEORY OF OPERATION
12
THEORY OF OPERATION 1. Block Diagram
The block diagram of this printer is shown in Fig. 2-1.
(1)
(2) (3) (4)
Fig. 2-1 Block Diagram 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 this board 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 perform printing. 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 interface 5 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 signal for the print head drive, carriage motor drive and paper feed motor drive respectively. Control Panel Board This panel circuit is for manual operation of the printer. Printer Mechanism The printer mechanism consists of a print head, carriage motor, paper feed motor and detectors. Power Supply Unit AC power is converted to 25.5VDC and 5VDC.
13
THEORY OF OPERATION 2. Main Logic Board
2-1. Data Input Operation
2-1-1. Parallel Interface Communications between the host computer and this printer are facilitated via parallel connectors. This section explains the 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 the BUSY 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 LOW and read the data. (5) Upon completion of the data reading, the CPU notifies the host computer of the data receivable state by setting the BUSY 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 of the handshake.
14
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 the voltage level (RS-232C <-------> TTL) and the data transfer method (Serial <-------> parallel).
Fig. 2-4 Serial Interface
15
THEORY OF OPERATION
IC4 is a dual RS-232C driver/receiver which includes a capacitive voltage generator to supply RS-232C voltage levels from 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 converted into parallel data, and output to the main logic board. Conversely, parallel data received by the MPU is converted there into 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, 53 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 or less, 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 space status, which indicates that it can receive data. (2) XON/XOFF method When 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 code 19) is output to the TXD terminal, and the computer receives a request to stop data transfer. The printer outputs DC3 until it (the computer) stops data transfer. During printing, when the buffer full status is cancelled and data can be received, DC1 (ASCII code 17) is output to the TXD terminal. When DC1 is output from the printer, the computer follows the data format, and begins data transfer. Data transfer will continue until DC3 is output again. (3) ETX/ACK method The data block is configured as shown below, but the initial STX code is not necessary. When an STX code is sent from 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 been completed. Data block form: STX DATA (8 KB or less) ETX
Fig. 2-5 Data Format
16
THEORY OF OPERATION
(1) DTR method
(2)
XON/XOFF method
(3)
ETX/ACK method
Fig. 2-6 Data Input Timing Chart with Serial Interface
17
THEORY OF OPERATION
2-2. General Flow Chart
A general flow chart of editing and printing operations is shown in Fig. 2-7.
Fig. 2-7 General Flow Chart of Editing and Printing 18
THEORY OF OPERATION
2-2-1. Editing Data stored in the RAM is read out sequentially by the CPU and then edited according to a function code that has been specified 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 Circuit Edited print data is output to terminal Q in the gate array through the CPU data bus, as regulated by the issue timing of a WR signal. However, as for pin 9 (HD9) of the print head, the data is output to the same terminal upon issue of the next WR 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 TR13 will 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 Circuit The print head temperature detection circuit protects against damage when the print head heats up abnormally. Fig. 2-9 shows this circuit. The print head has a thermistor to show the temperature of the head solenoids. This thermistor is an element that converts temperature into voltage. Its output voltage is input to an analog pin of the CPU. The CPU compares this input voltage against its reference voltage Vref to find out the temperature of the head solenoids and carries out the following operations depending 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 the temperature 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.
19
THEORY OF OPERATION
Fig. 2-9 Print Head Temperature Detection Circuit 2-2-4. Carriage Motor Driving Circuit This printer employs a stepping motor as the carriage motor. Unlike regular motors on the market, this stepping motor will not operate just by connecting it to a power source. The motor operates only when a drive pulse is fed to it, but even then, it turns only a certain angle. This stepping motor is characterized by 4-phase stepping. Control of the motor is facilitated by phase 1-2 excitation. The following shows the carriage motor drive circuit and the control signal generated by 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 setting Mode terminal CMNA and CMNB of the gate array to HIGH or LOW Operation: and by turning transistors TR5 and TR7 ON or OFF. Standby: When TR5 and TR7 is ON, +25.5V is supplied to the carriage motor and when TR5 and TR7 is OFF, +5V is supplied to the motor via diode D3 and D4. 20
Voltage VH (+25.5V) VL (+5V)
Application Motor Drive Holding Bias
THEORY OF OPERATION
2-2-5. Carriage Motor Speed Control Since the carriage motor is a stepping motor, the carriage can be stopped at a desired position by controlling acceleration and 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 (horizontal character 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 Circuit Again, a stepping motor is employed as the paper feed motor, which turns a certain angle only when a drive pulse is received. This 4-phase stepping motor is controlled by the phase 1-2 excitation method. The following shows the paper feed motor drive circuit and the control signal generated by the phase 1-2 excitation method.
Fig. 2-12 Paper Feed Motor Driving Circuit
21
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 Operation Standby: Voltage VH (+25.5V) VL (+5V) Application Motor Drive Holding Bias
Voltage to the paper feed motor is changed by setting CPU port P31 to LOW or HIGH and by turning transistor TR6 and transistor 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.
22
THEORY OF OPERATION
2-3. Reset Circuit
The 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 ) signal is being output from the host computer.
Fig. 2-14 Reset Circuit and Protection Circuit.
· Power On Reset
1 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. This LOW signal triggers RESET command to the CPU and the RESET terminal ( RES ) of the gate array. Resetting the CPU and the gate array will ignore all the drive signals for the carriage motor, the paper feed motor and the print head, preventing operation errors at power ON.
2 3
· Reset by Input Prime Signal from Host Computer
1 2 The input prime signal from the host computer is output to pin 31 of the connector CN1. This output signal will set the terminal INIT 2 of the CPU to LOW, executing interruption. Then, the CPU will be initialized.
23
THEORY OF OPERATION
2-4. Reset by +5V Line Voltage Detection
A voltage-detecting IC (IC2 in Fig. 2-14) detects momentary drops in voltage or unstable voltage supply (due to power failures, etc.) on the +5V line. If the voltage on the +5V line falls below 4.25V, the RESET signal appears at the output terminal of the voltage-detecting IC.
Fig. 2-15 Equivalent Circuit of Voltage-Detecting IC
Fig. 2-16 Operational Timing Chart
2-5. Protection Circuit
This printer is provided with a protection circuit which shuts off the print head and motor driving circuits in the event of a 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 LOW and the RESET signal is output from the output terminal (OUT) of the voltage-detecting IC. By this signal, the CPU and the gate array are reset and the print head, the carriage motor and paper feed motor driving signals are ignored, protecting the printer from the CPU runaway.
3.
Power Supply Unit
The power supply circuit converts the incoming AC power to DC voltages, +5V and +25.5V. Voltage VH (+25.5V) +5V VL (+5V) Tolerance DC25.5V±5% DC5V±2.5% DC5V±10% Application To drive print head, carriage motor, paper feed motor. To supply power to CPU, ROM, RAM, TTL and ICs. To retain carriage motor and paper feed motor.
24
THEORY OF OPERATION 4. Mechanism
4-1. Print Head Mechanism
The 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 Mechanism
The 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 side with the print head mounted above it. A timing belt is clamped to the base of the carriage and a shield plate is mounted at the base for home position detection. (2) Timing Belt The timing belt is suspended between the timing pulley of the carriage motor and the timing pulley of the tension lever, 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 driving force from the carriage motor. (3) Carriage Motor The carriage motor is a HB (Hybrid) type, four-phase and 192-pole pulse motor, which is driven by pulse signals from the control circuit. The rotational rate depends on the number of pulses per unit time. By varying this rotational rate (that is, the carriage carrying rate), the size of the horizontal letters can be changed in each print mode.
25
THEORY OF OPERATION
Fig. 2-18 Print Head Carrying Mechanism
4-3. Ink Ribbon Feed Mechanism
The ink ribbon feed mechanism is linked to the print head carrying mechanism described previously so that the ink ribbon is 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 to rotate. This rotation is conveyed sequentially to the gears that work to wind the ribbon. The carriage is equipped with a clutch lever 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
26
THEORY OF OPERATION
4-4. Paper Feed Mechanism
The 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 one of the two methods, using the release lever. Position of release lever Linkage between tractor gear and tractor clutch Platen roller and holder roller Release lever position detector Paper feeding method (1) [1] Not Pressured Closed Friction [2] Linked Not Open Tractor
Friction Method Friction 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 rollers turn. As the paper feed motor is driven, the motor gear, through the idler gear, turns the platen gear in the paper feeding direction. However, since the tractor gear and the tractor clutch are not linked at this time, the tractor unit will not be driven. Tractor Method Tractor 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 be transferred to the tractor unit via the idler gear and the platen gear.
(2)
Fig. 2-20 Paper Feed Mechanism
27
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, and the printing position is determined by these signals. Paper Out Detector Two paper out detectors are located at the paper insertion slit. When paper is present, the photo transistor with the reflecting type photo sensor goes on. As soon as paper runs out, this transistor goes off, outputting a paper empty signal.
(2)
Fig. 2-21 Home Position Detector (3)
Fig. 2-22 Paper Out Detector
Bail Lever Position Detector The leaf switch is open when the bail roller is in contact with the platen roller, and it is closed when the bail roller is separated from the platen roller. Release Lever Position Detector The leaf switch is closed when the release lever is in the Friction position, and is open in the Tractor position.
(4)
Fig. 2-23 Bail Lever Position Detector
Fig. 2-24 Release Lever Position Detector
28
CHAPTER 3 ADJUSTMENTS
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 correct malfunctions.
1.
Gap Adjustment Between Print Head and Platen ............................................ 31
1-1. 1-2. Measuring Gap Between Print Head and Platen................................................. 31 Adjusting Gap Between Print Head and Platen .................................................. 31
2. 3.
Adjustment of Timing Belt Tension ................................................................... 32 Adjustment of Home Position Detector ............................................................ 33
1 2 3 4 5 6 7
ADJUSTMENTS
30
ADJUSTMENTS 1. Gap Adjustment Between Print Head and Platen
1-1. Measuring Gap Between Print Head and Platen
(1) (2) (3) (4) (5) (6) (7) Remove the upper case unit according to procedures described in Chapter 4. Set the adjustment lever [1] at step two. Remove the ribbon guide [2]. Insert a thickness gauge [3] between the print head [4] and the platen [5], and measure the gap. This measurement must be carried out at the left [L], center [C] and right [R] . The standard gap value is 0.30 to 0.40 mm. If the gap does not lie within this range,adjust it by following the procedure in item 1-2.
Fig. 3-1 Gap Adjustment
Fig. 3-2 Position of Adjustment Lever
Fig. 3-3 Gap Measurement
1-2. Adjusting Gap Between Print Head and Platen
If the gap does not lie within the standard range, adjust it by carrying 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 gap is 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 adjust the gap at the right. (5) After adjusting, set the adjustment lever [1] to the position shown in Fig. 3-2 and tighten the nut [6]. (Note) When tightening the nut [6], make sure that the carriage stay [8] does not move. (6) Install the ribbon guide [2] .
Fig. 3-4 Gap Adjustment
31
ADJUSTMENTS 2. Adjustment of Timing at Belt Tension
The 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, make adjustments 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
32
ADJUSTMENTS 3.
(1) (2) (3) (4)
Adjustment of Home Position Detector
Remove the printer cover. Loosen the screw [1]. Set the projection [3] of the home position detector [2] between the two lines stamped. Tighten the screw [1].
Fig. 3-7 Adjustment of Home Position Detector
33
ADJUSTMENTS
34
CHAPTER 4 PARTS 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. 2. 3. 4. 5. 6. 7. 8. 9.
Upper Case Unit .................................................................................................. 37 Control Panel Board ........................................................................................... 37 Printer Mechanism .............................................................................................. 38 Main Logic Board ................................................................................................ 38 Fuse Board Unit .................................................................................................. 39 Fuses .................................................................................................................... 39 Print Head ............................................................................................................ 40 Paper Feed Motor Unit ........................................................................................ 40 Carriage Motor Unit ............................................................................................. 41
1 2 3 4 5 6 7
10. Bail Roller Shaft Unit .......................................................................................... 41 11. Platen Unit ........................................................................................................... 42 12. Tractor Unit .......................................................................................................... 42
PARTS REPLACEMENT
36
PARTS REPLACEMENT 1.
(1) (2)
Upper Case Unit
Turn off the power switch [1] Remove · Printer cover · Rear cover · Platen knob [2] · ROM cover [3] · Five tapping screws [4] Move the carriage unit [5] over the right so that it aligns with the cut-out of the upper case unit [6] . Remove · Upper case unit [6] Push the hook [7] of the lower case to separate the upper case unit [6] and lower case, next lean the upper case unit [6] forward for removal. · Cable [8] of control panel board
(3) (4)
2.
(1)
Control Panel Board · Upper case unit according to the procedure de· Three tapping screws [1] · Control panel board [2]
scribed in item 1. Remove
37
PARTS REPLACEMENT 3.
(1)
Printer Mechanism · Upper case unit according to the procedure de· · · · · ·
scribed in item 1. Five tapping screws [1] Screw [2] Cable holder [3] Lift up the tab of the cable holder, and slide it to the left for removal. Printer head cable [4] Four connectors [5] Printer mechanism [6] Remove
4.
(1)
Main Logic Board · Printer mechanism according to the procedure · · · · ·
described in item 3. I/F cartridge unit [1] Connector [2] Five screws [3] Screw [4] Main logic board [5] Remove
38
PARTS REPLACEMENT 5.
(1)
Fuse Board Unit · Upper case unit according to the procedure de· · · · · ·
scribed in item 1. Connector [1] Two tapping screws [2] Tapping screw [3] (Except for HK) Tapping screw [4] Power switch [5] Fuse board unit [6] Remove
6.
(1)
Fuses · Upper case unit according to the procedure described in item 1. Inspect · Fuse F1 [1] · Fuse F201 [2] · Fuse F202 [3] Defective Replace fuse as follows: AC voltage 120V 220V/240V F1 5TT1A 630mA F201, F202 For US, UK, AS, 5TT3A TW, LA, HK For EC, SC, SU, PL 3.15A New fuse blown Inspect circuit Remove
(2)
39
PARTS REPLACEMENT 7.
(1)
Print Head
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 printing so wait for it to cool before removing it. Adjust · Gap between print head and platen. Refer to item 1 of Chapter 3.
· · · · · ·
(2)
8.
(1)
Paper Feed Motor Unit · Printer mechanism according to the procedure · · · ·
described in item 3. Cord fastener binding the lead wires. Connector [1] Two screws [2] Paper feed motor unit [3] Remove
40
PARTS REPLACEMENT 9.
(1)
Carriage Motor Unit · Printer mechanism according to the procedure
described in item 3. · Cord fastener binding the lead wires. · Connector [1] · Two screws [2] · Carriage motor unit [3] Adjust · Timing belt tension Refer to item 2 of Chapter 3. Remove
(2)
10. Bail Roller Shaft Unit
(1)
· Upper case unit according to the procedure described in item 1. 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 q mark on the gear [5] to install the bail lever L [3] .
Remove
· · · ·
41
PARTS REPLACEMENT 11. Platen Unit
(1)
· Upper case unit according to the procedure described in item 1. Move the bail lever [1] forward. 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 allow removal of platen holders R and L from the frame. · Platen unit [8] Caution in assembly: When assembling the platen gear assembly [9] on the idler gear, align the teeth of gear A and gear B (be sure to align the holed [10] in the two gears.) Adjust · Gap between print head and platen. Refer to item 1 of Chapter 3.
Remove
(2) (3)
(4)
12. Tractor Unit
(1)
· Platen unit according to the procedure described
in item 11. Stop ring [1] Release lever [2] Two nuts [3] Two tractor bushings [4] Lift the tab [5] of the tractor bush allow removal of 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] to install the release lever [2].
Remove
· · · ·
42
CHAPTER 5 MAINTENANCE AND LUBRICATION
1.
Maintenance ........................................................................................................ 45
1-1. 1-2. Cleaning ................................................................................................................. 45 Checks ................................................................................................................... 45
2.
Lubrication ........................................................................................................... 46
2-1. 2-2. 2-3. Lubricant ................................................................................................................ 46 Lubricating Method ............................................................................................... 46 Lubricated Areas ................................................................................................... 46
1 2 3 4 5 6 7
44
MAINTENANCE AND LUBRICATION 1. Maintenance
In order to maintain the optimum performance of this printer and to prevent trouble, maintenance must be carried out according 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. 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.
(2)
1-2. Checks
Checks 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 is operating 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 check After 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.
45
MAINTENANCE AND LUBRICATION 2. Lubrication
Lubrication is very important to maintain optimum performance and to prevent trouble.
2-1. Lubricant
The type of lubricant greatly affects the performance and durability of the printer, especially in a low temperature environment. We recommend use of the grease and lubrication oils listed below for this printer. Product name FLOIL GB-TS-0 KF96-1000CS Mobil 1 Maker Kanto Chemicals Co., Ltd. Shinetsu Chemical Industry Mobil oil
2-2. Lubricating Method
When 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 is necessary irrespective of the regular lubrication whenever lubricant becomes deficient after cleaning or whenever parts have been disassembled or replaced.
2-3. Lubricated Areas
NO. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] Lubricating Point Rubbing surfaces of idler gear 16 × 72 × 0.5 and idler gear shaft A Rubbing surfaces of gear 40 × 0.5 and gear shaft Rubbing surfaces of tractor shaft and tractor bushing Rubbing surfaces of tractor shaft and release lever Rubbing surfaces of carriage stay and bushing 14 × 16 × 10 Rubbing surfaces of clutch shaft and gear 22 × 1.0 Rubbing surfaces of release shaft and paper chute Rubbing surfaces of roller holder and lower case Rubbing surfaces of ribbon cassette gear and carriage Rubbing surfaces of idler gear 70 × 0.3 and carriage Rubbing surfaces of idler gear B 16 × 1 - 40 × 0.3 and carriage Rubbing surfaces of clutch gear and carriage Rubbing surfaces of idler gear 17 × 41 × 0.3 and gear shaft C Rubbing surfaces of pulley cap and pulley shaft Rubbing surfaces of timing pulley and stop ring Rubbing surfaces of tractor holder and tractor cover Rubbing surfaces of adjusting lever and frame Rubbing surfaces of idler gear 24 × 40 × 0.5 and gear shaft Grease/Oil GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 Mobil 1 Mobil 1 GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 GB-TS-0 KF96-1000CS GB-TS-0 GB-TS-0
46
MAINTENANCE AND LUBRICATION
Fig. 5-1 Lubricated Areas 1
47
MAINTENANCE AND LUBRICATION
Fig. 5-2 Lubricated Areas 2 48
CHAPTER 6 TROUBLESHOOTING
1. 2. 3. 4.
Troubleshooting Procedures ............................................................................. 51 Unit Replacement Flow Chart ............................................................................ 52 Repair by Unit Replacement .............................................................................. 53 Repair by Replacement of Parts ........................................................................ 59
4-1. 4-2. 4-3. 4-4. 4-5. Does not Operate at All with Power on ............................................................... 59 Power Supply Circuit Abnormal .......................................................................... 60 Defective Motor Operation ................................................................................... 61 Defective Print Head Operation ........................................................................... 62 Defective Interface Operation .............................................................................. 63
1 2 3 4 5 6 7
49
50
TROUBLESHOOTING 1. Troubleshooting Procedures
Troubleshooting 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 replacement and 2) indicates printer mechanism replacement, to be carried out if the problem has not been corrected. 1) 2) Main Logic Board Replacement Printer Mechanism Replacement
Check again at this time whether the replaced unit is malfunctioning. (This is done to rule out trouble caused by improper contact of connectors.) Replaceable units consist of the following: · Power supply unit · Main logic board · Printer mechanism · Control panel board In 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.
51
TROUBLESHOOTING 2. Unit Replacement Flow Chart
Problem Details Specific display lamp only will not glow Specific switch only cannot be input Buzzer does not sound (sound volume inadequate) Strange sounds during operation No motor holding power (power very weak) Dots skipped Print is too light Ink ribbon entanglement (wire sticks out) Absence of paper not detected Lever position not detected Incorrect printing Ink ribbon not forwarded No operation at DIP switch setting Faulty operation when power is turned on/off Abnormal motor operating speed (slow) Fuse blown during operation 2 Unit Exchange Sequence Power supply unit Main logic board 2 Printer mechanism Control panel board 1 Remarks
Category
Operation related
2
1
1
Motor related
1
2
1 2 2 2 2 1 1 1 1 2 EDS mode Check I/F cable 1 1 1 1
Print head related
Ink ribbon Gap check
Interface related and others
Detector related
1
1 3 1
2 2
Note: The figures 1, 2 and 3 mean the priority of replacement.
52
TROUBLESHOOTING 3. Repair by Unit Replacement
START
A
* Turn power off. * Remove I/F cable. * Mount ink ribbon. * Set paper. * Move carriage to center. Turn power on.
Carriage Movement? YES
NO
B
Carriage operates normally? YES
NO
Carriage motor operating waveform is normal? *1 YES
NO
Replace printer mechanism.
1) Replace main logic board. 2) Replace printer mechanism.
A
Carriage stops at home position? YES
NO
Home position switch signal is normal? YES
NO
Replace main logic board.
1) Replace main logic board. 2) Replace printer mechanism.
A
53
TROUBLESHOOTING
NO On line lamps light? YES
On line lamp signal is normal? YES Replace control panel board.
NO
On line switch in on. (Take Off Line)
Replace main logic board.
NO On line lamp is out?
A
YES
E
Paper feed switch is on.
Paper feed switch operation is normal? YES
NO
Paper feed motor drive waveform is normal? *2 YES Replace printer mechanism.
NO
Power is off.
1) Replace main logic board. 2) Replace printer mechanism.
Power source is on while pressing paper feed switch.
Self printing:
A
Carriage operates normally? YES NO
Carriage motor drive waveform is normal? *1 YES Replace printer mechanism.
NO
1) Replace main logic board. 2) Replace printer mechanism.
A
54
TROUBLESHOOTING
Printing operation is normal? YES
NO
Print head drive signal waveform is normal? *3 YES Replace printer mechanism.
NO
1) Replace main logic board. 2) Replace printer mechanism.
A
Paper feed operation is normal? YES NO
Paper feed motor drive waveform is normal? *2 NO YES
NO
Ribbon feed operation is normal? YES
1) Replace main logic board. 2) Replace printer mechanism.
1) Replace ink ribbon. 2) Replace printer mechanism.
Replace printer mechanism.
Self printing terminates. Check host computer connection. Power is off and I/F cable is connected.
A
A
C
Power is on. Print program operation begins from host computer.
55
TROUBLESHOOTING
Printing begins? YES
NO
D
Printing operation normal? YES Printer is normal; host computer print program stops.
NO
1) Replace I/F cable. 2) Replace main logic board. 3) Check host computer.
END
C B
Works with carriage hand? YES
NO Replace printer mechanism.
Output (VH, VL, +5V) of power supply unit is normal? *4 NO Power source is off.
YES 1) Replace main logic board. 2) Replace printer mechanism. 3) Replace control panel board. NO
Fuse blows out? YES Replace fuse. Remove connector CN201 of main logic board. Power source is on.
Replace power supply unit.
A
56
TROUBLESHOOTING
Output of power supply unit is normal? *4 YES Power source is off.
NO
Replace power supply unit. Connect connector CN201 of main logic board. Power source is on. NO
Fuse blows out? YES Replace fuse 1) Replace main logic board. 2) Replace printer mechanism. 3) Replace control panel board.
A
57
TROUBLESHOOTING
D
I/F signal is normal? *5 NO Ready condition? YES There is data transmission? NO Hardware check or check of host computer print program.
YES
NO
YES
I/F mode set up properly? NO I/F mode set up changed.
YES
1) Replace I/F cable. 2) Replace main logic board.
A C E
On line switch goes ON/OFF? YES On line lamp drive signal is normal? YES Replace main logic board.
NO
NO
Replace main logic board.
1) Replace control panel board. 2) Replace main logic board.
A
58
TROUBLESHOOTING 4. Repair by Replacement of Parts
4-1. Does not Operate at All with Power on
START
VH, VL, +5V are supplied? *4 YES RESET signal becomes HIGH? *6 YES Crystal waveform is normal? *7 YES ROM OE signals become LOW? YES Carriage motor abnormal.
NO See 4-2. Power Supply Circuit Abnormal.
DC Power abnormal.
NO
Check RESET circuit; replace parts. NO
Check crystal circuit; replace parts. NO
1) Replace CPU or ROM. 2) Check relevant circuit.
Check operation.
END
59
TROUBLESHOOTING
4-2. Power Supply Circuit Abnormal
(1) Remove connectors CN201 of the main logic board.
START
Fuse F1 is blown? NO
YES Replace Fuse F1
Fuse is blown again? NO
YES Replace Transformer.
ACS1 and ACS2 are supplied? NO Replace Transformer.
YES
Connect the connector CN201.
The no load voltages are below: ACS1 About AC30V ACS2 About AC9V YES Check or replace 1) IC201 2) D201 YES
Fuse F201 is blown? NO
Fuse F202 is blown? NO Check or replace. 1) IC202 2) TR201 3) ZD201
Check operation.
END
60
TROUBLESHOOTING
4-3. Defective Motor Operation
START
START
LF-CMN signal is normal? *2 YES
NO Check or replace 1) TA1 2) TR6 3) CPU
CR-CMN signal is normal? *1 YES
NO Check or replace 1) TA1 2) TR5 or TR1 3) CPU
LF-ø1, ø2, ø3, ø4 are normal? *2 YES
NO
CR-ø1, ø2, ø3, ø4 are normal? *1 YES
NO
Check or replace 1) TA2 2) CPU
Check or replace 1) TA3 2) CPU
Replace LF-motor
Replace CR-motor
Check operation
Check operation
END
END
61
TROUBLESHOOTING
4-4. Defective Print Head Operation
START
Does not print at all? YES VH(+25.5V) line is supplied? YES
NO
NO
A specific pin does not work? NO
YES
Check or replace 1) TR8 ~ TR16
Power supply unit abnormal. (Refer to item 4-2.)
Check or replace 1) TR1 2) Gate array
Print is light as whole? NO
YES
Head energizing control signal is normal? *3 YES
NO
Adjust gap (Refer to chapter 3.)
Check or replace 1) Gate array 2) CPU
Check or replace 1) Print mechanism
END
62
TROUBLESHOOTING
4-5. Defective Interface Operation
START
Set at on line
Start print program of host computer.
Is I/F signal normal? *5 YES
NO
Incorrect print generated? NO
YES
Check I/F cable.
Check or replace 1) IC3 2) Gate array 3) CPU
Check operation
END
63
64
CHAPTER 7 PARTS LIST
HOW TO USE PARTS LIST
(1) (2) DRWG. NO. This column shows the drawing number of the illustration. 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 PARTS NO. Parts numbers must be notified when ordering replacement parts. PARTS NAME Parts names must be notified when ordering replacement parts. Q'TY This column shows the number of the part used as indicated in the figure. REMARKS When there are differences in the specifications of the fuse, destinations, etc., the differences are described in words or indicated by two letters. US ... U.S.A. EC ... EC(with Germany) UK ... United Kingdom SC ... Scandinavia AS ... Australia HK ... Hong Kong TW ... Taiwan SU ... Russia LA ... Lation America PL ... Poland The seal number of ROM is described in this column. The "**" mark of seal number is a variable representing on the software version. RANK Parts marked "S" are service parts. Service parts are recommended to be in stock for maintenance.
(3) (4) (5) (6)
(7)
1 2 3 4 5 6 7
1. Printer Assembly .............................. 66
1-1. Disassembly Drawing ................... 66 1-2. Parts List ......................................... 66
6-1. Circuit Diagram ............................... 88 6-2. Component Layout ......................... 89 6-3. Parts List ......................................... 89
2. Printer Mechanism ........................... 69
2-1. Disassembly Drawing ................... 69 2-2. Parts List ......................................... 70
7. Fuse Board ....................................... 90
7-1. Circuit Diagram ............................... 90 7-2. Component Layout ......................... 90 7-3. Parts List ......................................... 90
3. Sub-assembly ................................... 71
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. Upper Case Unit ............................. 71 Lower Case Unit ............................. 72 Interface Cartridge Unit ................ 73 Pull Tractor Unit (option) .............. 74 Frame Unit ...................................... 75 Tractor Unit ..................................... 77 Platen Unit ...................................... 78
8. Parrallel Straight Board ................... 91
8-1. Circuit Diagram ............................... 91 8-2. Component Layout ......................... 92 8-3. Parts List ......................................... 92
9. Serial Buffer Board (option) ............ 93
9-1. Circuit Diagram ............................... 93 9-2. Component Layout ......................... 94 9-3. Parts List ......................................... 95
4. Wiring Scheme of Printer ................ 79 5. Main Logic Board ............................. 80
5-1. Circuit Diagram ............................... 80 5-2. Component Layout ......................... 84 5-3. Parts List ......................................... 85
10. Parallel Buffer Board (option) ......... 96
10-1. Circuit Diagram ............................... 96 10-2. Component Layout ......................... 97 10-3. Parts List ......................................... 98
6. Control Panel Board ........................ 88
11. Waveform with Oscilloscope .......... 99
1.
Printer Assembly
1-1. Disassembly Drawing
1-2. Parts List
Printer Assembly
DRWG.NO. REV. PARTS NO. 1 89064810 2 *1 82900772 3 87291130 87291150 PARTS NAME MECHANISM WITH HEAD DP935 RIBBON HOLDER 891 LOWER CASE UNIT NX-1500 LOWER CASE UNIT LC-15 SC Q'TY 1 1 1 1 REMARKS TO SECTION 2-2 EXCEPT FOR SC FOR SC RANK S S S S
66
Printer Assembly
DRWG.NO. REV. PARTS NO. 4 87292150 87292160 87292170 *2 87292170 #2 87295900 #2 87295880 5 87294110 87294120 *2 87294120 *3 87294300 #3 87294120 87294130 87294140 87294150 6 87290190 87290200 #1 87290370 #1 87295140 #2 87295150 7 *3 83023420 #3 83023421 8 *3 87296050 #3 87816240 9 *1 83023430 *3 83023431 #3 83025801 10 *3 87296030 #3 87816230 11 80981220 *2 80981220 #2 80982200 *2 80981210 #2 80982210 *4 80981880 #4 80981900 #1 80981890 12 *2 83910911 #2 83910912 13 *3 83911440 #3 83025810 14 *2 87299210 #2 87808010 89597010 89597030 89597020 87299220 87299230 87299240 15 01903055 16 01903038 17 01914036 17a 01914036 18 *2 01914039 #2 01914034 19 *3 01704103 *3 01901425 #3 01901425 PARTS NAME MAIN LOGIC BOARD UNIT NX-1500 MAIN LOGIC BD UNIT NX-1500 HK MAIN LOGIC BD UNIT LC-15 EC MAIN LOGIC BD UNIT LC-15 EC MAIN LOGIC BD UNIT NX-1500 SU MAIN LOGIC BD UNIT LC-15 PL FUSE BOARD UNIT NX-1500 US FUSE BOARD UNIT LC-15 EC FUSE BOARD UNIT LC-15 EC FUSE BOARD UNIT NX-1500 SU FUSE BOARD UNIT LC-15 EC FUSE BOARD UNIT LC-15 UK FUSE BOARD UNIT LC-15 AS FUSE BOARD UNIT NX-1500 HK UPPER CASE UNIT NX-1500 UPPER CASE UNIT LC-15 UPPER CASE UNIT NX-1500 SU UPPER CASE UNIT LC-15 SU UPPER CASE UNIT LC-15 PL(P) PRINTER COVER NX-1500 PRINTER COVER NX-1500 PAPER GUIDE UNIT NX-1500 PAPER GUIDE UNIT XBL-15II REAR COVER NX-1500 REAR COVER NX-1500 REAR COVER XBL-15II PLATEN KNOB UNIT NX-2400 PLATEN KNOB UNIT XBL-15II INK RIBBON CARTRIDGE JAN X9 INK RIBBON CARTRIDGE JAN X9 INK RIBBON CARTRIDGE JAN Z9HD INK RIBBON CARTRIDGE UPC X9 INK RIBBON CARTRIDGE UPC Z9HD INK RIBBON CARTRIDGE UPC LZ9 INK RIBBON CARTRIDGE UPC LZ9 INK RIBBON CARTRIDGE JAN LZ9 CABLE HOLDER 921 CABLE HOLDER 921 ROM COVER NX-1500 ROM COVER XBL-15II IF CARTRIDGE UNIT X15 CARTRIDGE PAR UNIT Z15 BUFFER CARTRIDGE IP-128XL UPC BUFFER CARTRIDGE IP-128XLHKJAN BUFFER CARTRIDGE IP-128XL JAN SERIAL CARTRIDGE IS-8XL UPC SERIAL CARTRIDGE IS-8XL JAN SERIAL CARTRIDGE IS-8XL JAN HK SCREW TR 3-8 WS/WF SCREW TAT 3-10 PT-FL SCREW TR 4-5 WS SCREW TR 4-5 WS SCREW TAT 4-8 WS SCREW TAT 4-8 CT-WF SCREW TRS 4-10-C SCREW TR 4-10 FL SCREW TR 4-10 FL Q'TY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5 1 1 1 1 2 2 2 REMARKS US,UK,AS,TW,LA FOR HK FOR EC,SC FOR SU FOR SU FOR PL FOR US,TW FOR EC,SC,LA,PL FOR SU FOR SU FOR SU FOR UK FOR AS FOR HK FOR US,HK,TW,LA FOR EC,UK,AS,SC FOR SU(NX) FOR SU(LC) FOR PL RANK S S S S S S S S S S S S S S S S
EC,UK,AS,SC,SU,LA FOR TW,HK FOR TW,HK FOR US,LA FOR US,LA FOR US,LA :OPTION FOR US,LA :OPTION EXC.FOR US,LA:OPTION
S S S S S S S S S S S S S S
PARALLEL I/F PARALLEL I/F FOR US,LA :OPTION FOR HK :OPTION EXC.FOR US,LA,HK:OP. FOR US,LA :OPTION EXC.FOR US,LA,HK:OP. FOR HK :OPTION
S S S S S S
EXCEPT FOR HK,SU EXCEPT FOR SU
FOR US EXCEPT FOR US
S S S S S S S S S
67
DRWG.NO. REV. PARTS NO. 20 21 22 01914031 01914030 87299160 87299190 89590183 89590181 89590180 89590186 89590185
PARTS NAME SCREW TAT 4-12 PT-FL SCREW TAT 4-15 PT PULL TRACTOR UNIT PT-15XJ PULL TRACTOR UNIT PT-15XJ ASF SF-15DJ US ASF SF-15DJ WG ASF SF-15DJ UK ASF SF-15DJ HK ASF SF-15DJ AS
Q'TY 5 5 1 1 1 1 1 1 1
REMARKS
RANK S S
UPC JAN
#1 #2
FOR US,LA :OPTION EXC.FOR US,LA:OPTION FOR US,LA :OPTION FOR EC :OPTION FOR UK,SC,TW :OPTION FOR HK,SU :OPTION FOR AS :OPTION
68
2.
Printer Mechanism
2-1. Disassembly Drawing
69
2-2. Parts List
Printer Mechanism
DRWG.NO. REV. PARTS NO. 1 89131010 2 *1 87060130 #1 87060131 3 87061110 4 87067170 5 83400650 6 *2 83400470 #2 83400471 7 83400670 8 *1 82401140 #1 82401141 9 82501100 10 87063080 11 81370660 12 87066050 13 87067180 14 *1 87067190 #1 81380520 15 *3 87067030 #3 87427020 16 *1 80510860 *3 80510930 #3 80510931 17 *1 80530570 #1 80530571 18 *1 80530660 #1 80530661 19 01902612 20 01903064 21 00830604 22 01903018 23 02040404 24 *2 02040403 #2 02020401 25 04020015 26 04020016 27 04991214 28 04991230 29 04991232 30 04991204 31 *1 82900772 *2 82900773 #2 82902200 32 #1 87060720 33 #1 01903073 34 *2 83100611 #2 83100612 35 #2 83400660 36 #2 87060270 37 #2 87060700 PARTS NAME PRINT HEAD DP9305 FRAME UNIT 935 FRAME UNIT 935 CARRIAGE MOTOR UNIT 935 BAIL ROLLER SHAFT UNIT 935 BAIL LEVER L 935 RELEASE LEVER 921 RELEASE LEVER 921 SPRING HOLDER LEVER 935 ADJUSTING LEVER 935 ADJUSTING LEVER 935 HOLDER SPRING B 935 PLATEN UNIT B 935 TRACTOR STAY 935 TRACTOR UNIT 935 ROLLER HOLDER UNIT 935 RELEASE SHAFT UNIT 935 RELEASE SHAFT 935 TENSION LEVER UNIT 921 TENSION LEVER UNIT 741 SPRING E050-055-0358 SPRING E056-060-0397 SPRING E056-060-0397 GROUND CONTACT SPRING 921 GROUND CONTACT SPRING 921 HOLDER SPRING 935 HOLDER SPRING 935 SCREW TAT 2.6-16 PT SCREW TAT 3-5 CT SCREW TR 3-6 SCREW TR 3-6 WS/WF FLANGED NUT NHW4.0-S TOOTHED NUT NHK4 HEXAGON NUT NH4-2 STOP RING SE3.0 STOP RING SE4.0 MINI CORD CLAMP UAMS-05-0 MINI CORD CLAMP UAMS-05-SN MINI CORD CLAMP UAMS-05SN-W FASTENER T18S RIBBON HOLDER 891 RIBBON HOLDER 891 RIBBON HOLDER 935 DETECTOR UNIT A ASSY 935 SCREW TR 3-6 FL SPECIAL RELEASE GEAR 921 RELEASE GEAR 921 BAIL LEVER R 935 CARRIAGE UNIT 935 DETECTOR UNIT B ASSY 935 Q'TY 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 4 1 1 1 1 2 2 2 1 1 2 2 2 1 2 1 1 4 4 1 1 1 1 2 3 1 1 1 1 1 1 1 1 1 1 REMARKS RANK S
NOTE1 S S S S S
S S S INCLUDES NO.34 NOT INCLUDE NO.34
S S S S S S S S S S S S S S S S S S S S S S S
Note 1: Frame unit includes drawing no. 9, 13, 14, 20, 27, 32, 33, 34, 35, 36 and 37.
70
3.
Sub-assembly
3-1. Upper Case Unit
DRWG.NO. REV. PARTS NO. 6-1 *2 80086550 #2 80087200 80086220 6-2 *3 80081910 #3 80081911 *3 80082500 #3 80082501 *3 80083640 #3 80083641 *3 80083650 #3 80083651 6-3 87290810 6-4 01903038 6-5 *2 83023400 *3 83023401 #3 83025781 *3 80992560 *3 80992570 *3 80992740 *3 80992800
PARTS NAME OPERATION SHEET SPECIAL LC-15 OPERATION SHEET NX-1500 SU OPERATION SHEET NX-1500 BRAND SEAL NX-1500 BRAND SEAL NX-1500 BRAND SEAL LC-15 BRAND SEAL LC-15 BRAND SEAL LC-15 SU BRAND SEAL LC-15 SU BRAND SEAL LC-15 PL BRAND SEAL LC-15 PL CONTROL PANEL BD UNIT NX-1500 SCREW TAT 3-10 PT-FL UPPER CASE NX-1500 UPPER CASE NX-1500 UPPER CASE XBL-15II SHEET U1 NX-2415 SHEET U2 NX-2415 SHEET U3 NX-2415 SHEET U1 NX-1500
Q'TY 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1
REMARKS FOR SU FOR SU EXCEPT FOR SU FOR NX-1500 FOR NX-1500 FOR LC-15 FOR LC-15 FOR LC-15 SU FOR LC-15 SU FOR LC-15 PL FOR LC-15 PL
RANK
S S S S S
S S
71
3-2. Lower Case Unit
DRWG.NO. REV. PARTS NO. 3-1 *2 83023410 *3 83023411 #3 83023413 3-2 82010900 3-3 82010910 3-4 82501050 3-5 82901390 3-6 80925381 3-7 *2 01903064 *3 01903094 3-8 *3 00930803 #3 00930803 3-9 *1 01914032 *2 01914039 #2 01914034 3-10 80086480 *3 80992810 *3 80992820 *3 80992830 *3 80992840 *4 80992850 #4 80992851 *4 80992860 #4 80992861
PARTS NAME LOWER CASE NX-1500 LOWER CASE NX-1500 LOWER CASE NX-1500 BOARD CHASSIS NX-1500 POWER CHASSIS NX-1500 GROUND SPRING NX-1500 GROUND BRACKET