DOT MATRIX PRINTER LC-1511 LC-1521 TECHNICAL MANUAL [ SECOND EDITION ]

Transcription

1 DOT MATRIX PRINTER LC-1511 LC-1521 TECHNICAL MANUAL [ SECOND EDITION ]

2 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.

3 INTRODUCTION This manual describes the LC-1511,1521 dot matrix printer. It is designed for use as a reference for periodic inspections and maintenance procedures to be executed by service personnel. It is not intended for the general user. Users of this manual should have a basic knowledge and understanding of the English language. 1 2 This manual is divided into the following sections: Chapter 1 General Specifications Chapter 2 Theory of Operation Chapter 3 Adjustments Chapter 4 Parts Replacement Chapter 5 Maintenance and Lubrication Chapter 6 Troubleshooting Chapter 7 Parts List First edition : Mar Second edition : Aug

4

5 CHAPTER 1 GENERAL SPECIFICATIONS 1 1. General Specifications External Appearance and Composition Control Panel Switch Combination Functions EDS Mode Settings Parallel Interface General Specifications Connector Signals Serial Interface (optional) General Specifications Connector Signal and Functional Descriptions (SPC-8K, IS-8H192) DIP Switch Settings (SPC-8K, IS-8H192) EE-PROM mode Outline Explanation of special control codes EE-PROM MAP Rewriting the EE-PROM... 17

6

7 GENERAL SPECIFICATIONS 1. General Specifications Printing System Serial Impact Dot-Matrix Printing Speed Pitch Draft (cps/dpi) NLQ (cps/dpi) LC /120H (Normal) Pica (10 cpi) 400/90H (HS) 75/240H Elite (12 cpi) 360/120H 90/240H Condensed pica (17 cpi) 255/240H 127/240H Condensed elite (20 cpi) 300/240H 150/240H LC-1511 Pica (10 cpi) 225/120H 56/240H Elite (12 cpi) 270/120H 67/240H Condensed pica (17 cpi) 191/240H 95/240H Condensed elite (20 cpi) 225/240H 112/240H H: half-dot Print Direction Draft: Bi-directional logic seeking NLQ: Uni-directional/ bi-directional logic seeking (selectable) Bit-Image: Uni-directional/ bi-directional logic seeking (selectable) Print Head Number of pins: 9 Life: 200 million dots/pin (Normal Mode) 100 million dots/pin (Multi-Part Mode) Line Spacing 1/6, 1/8 7/72, n/72, n/216 : software Character Matrix Pitch Draft NLQ LC H (Normal) Pica (10 cpi) 9 8H (HS) 18 23H Elite (12 cpi) 9 9H 18 19H Condensed pica (17 cpi) 9 11H 18 12H Condensed elite (20 cpi) 9 9H 18 10H LC-1511 Pica (10 cpi) 9 11H 18 23H Elite (12 cpi) 9 9H 18 19H Condensed pica (17 cpi) 9 11H 18 12H Condensed elite (20 cpi) 9 9H 18 10H Environment Operating temperature: 41 F to 95 F (5 C to 35 C) Storage temperature: 22 F to 149 F ( 30 C to 65 C) Operating humidity: 30% to 80% (non-condensing) Storage humidity: 20% to 90% (non-condensing) 3

8 GENERAL SPECIFICATIONS Paper Cut-sheet (manual feeding) Paper width: 7 to / 178 to 420 mm Paper length: 5.5 to 14 / 140 to 356 mm Paper thickness: to / 0.07 to 0.12 mm Paper weight: 14 to 24 lbs. / 52 to 90 g/m 2 / 45 to 77 kg Cut-sheet (with optional automatic sheet feeder) Paper size: B5, A4, LT, B4, A3, Legal Paper thickness: to / 0.08 to 0.12 mm Paper weight: 16 to 24 lbs. / 60 to 90 g/m 2 / 52 to 77 kg Hopper: 50 sheets of 64 g/m 2 30 sheets of 80 g/m 2 Stacker: 10 sheets Fanfold (with push tractor feeder) Paper width: 4 to 16.5 / to 419 mm Paper thickness: to / 0.07 to 0.11 mm (one-ply) / 0.35 mm maximum (total thickness of multi-ply paper, non-carbon) Paper weight: 14 to 22 lbs. / 52 to 82 g/m 2 / 45 to 70 kg (one-ply) 11 to 14 lbs. / 40 to 52 g/m 2 / 34 to 45 kg (multi-ply) Copies: Original + 1 or 2 (Normal Mode) Original + 3 or 4 (Multi-Part Mode) * Multi-Part Mode is recommended when using optional pull tractor unit. Fanfold (with optional pull tractor feeder) Paper width: 4 to 16.0 / to 406 mm Paper thickness: to / 0.07 to 0.11 mm (one-ply) / 0.35 mm maximum (total thickness of multi-ply paper, non-carbon) Paper weight: 14 to 22 lbs. / 52 to 82 g/m 2 / 45 to 70 kg (one-ply) 11 to 14 lbs. / 40 to 52 g/m 2 / 34 to 45 kg (multi-ply) Copies: Original + 1 or 2 (Normal Mode) Original + 3 or 4 (Multi-Part Mode) Labels Backing sheet: 4.5 to 16.5 / 114 to 419 mm Thickness Backing sheet: to / 0.07 to 0.09mm Total: / 0.19mm max. 4

9 GENERAL SPECIFICATIONS Emulation Standard Mode: EPSON ESC/P (9-pin) IBM Mode: Proprinter III Interface Standard: Centronics parallel Option: RS-232C/RS-422 serial Ribbon Type On-carriage, dedicated Monochrome (Y9WH), Black only Ribbon Life 2.5 million characters (Draft 10 cpi) Power Supply 120V AC +10%/ 17%, 230V AC +14%/ 13%; 50/60Hz (depending on country of purchase) Power Consumption LC W during standby / 50W during ASCII draft printing LC W during standby / 30W during ASCII draft printing Options PT-15HA Pull Tractor Unit SF-15HA Single-Bin Automatic Sheet Feeder IS-8H192 Serial Interface Unit IS-32H768 Serial Interface Unit SPC-8K Serial-To-Parallel Converter 186mm 7.3" 590mm 23.2" 355mm 13.9" Weight : 18.3lbs/8.3kg Fig. 1-1 External dimensions 5

10 GENERAL SPECIFICATIONS 2. External Appearance and Composition Paper guide Front cover Mute cover Control panel Interface connector Fig. 1-2 Front view of the Printer Release lever Power switch Platen knob Fig. 1-3 Rear view of the Printer 6

11 GENERAL SPECIFICATIONS Fig. 1-4 Front cover removed Fig. 1-5 Diagram of internal layout 7

12 GENERAL SPECIFICATIONS 3. Control Panel 3-1. Switch Combination Functions HS-DRAFT/DRAFT BANK SW 10 CPI POWER ROMAN SANSERIF A1 D4 12 CPI COURIER PRESTIGE ORATOR B2 C3 FONT E5 F6 COND PROP PITCH SET/EJECT PARK FORM FEED MICRO FEED LINE FEED ON LINE EDS BANK SWITCH STATUS ON/OFF PRINT EXIT Font Selection Pitch Selection Set/Eject/Park Form Feed Line Feed On-Line Panel Macro Back ward Forward Micro Feed Set TOF Auto Loading Position Change Mode Buffer Clear & All Reset OFF-LINE Quiet Mode Tear off (Long) Tear off (Short) Off-Line ON-LINE Font Lock Pitch Lock Multi-part Mode Hex Dump Mode Long Test Short Test Font & Pitch Lock EDS Mode Dot-Adjustment Mode Aging Mode Dot-Adjustment Print Mode EE-PROM Data Initialize POWER-ON Bank Switch Status On/Off Print Exit EDS MODE Left Right Next Exit DOT-ADJUSTMENT MODE Paper Loading Back ward Forward Cancel Set Save Factory settings AUTO LOADING POSITION CHANGE MODE 8

13 GENERAL SPECIFICATIONS 3-2. EDS Mode Settings Bank Switch Function ON OFF A 1 Emulation STANDARD / EPSON IBM 2 Character Table (CT) Standard / EPSON mode Graphics Italics IBM mode IBM #2 IBM #1 3 RAM Usage Input Buffer Download Buffer 4 Auto Sheet Feeder Not installed Installed 5 Paper Out Enabled Disabled 6 Multi-Part Mode Disabled Enabled B 1 Graphics Direction Bi-directional Uni-directional 2 Tear-off Disabled Enabled 3 Line Spacing 1/6" 1/8" 4 Auto LF with CR Disabled Enabled 5 Zero Style Normal Slashed 6 Strobe Timing Normal Reverse C 1, 2 Print Mode Draft ON ON HS-Draft OFF ON NLQ ON OFF 3,4,5 Print Pitch 10cpi ON ON ON 12cpi OFF ON ON 17cpi ON OFF ON 20cpi OFF OFF ON Proportional ON ON OFF 6 Quiet Disabled Enabled D 1,2,3,4 Page Length 11"/Letter ON ON ON ON 14"/Legal OFF ON OFF ON 8" OFF ON ON ON 10.5"/Executive ON OFF OFF ON 11.7"/A4 ON OFF ON ON 7.25"/Executive OFF OFF OFF ON 12" OFF OFF ON ON 3.5" ON ON ON OFF 8.5"/Letter ON ON OFF ON 5.5" OFF ON ON OFF 5 CR Centering Position Long Short E 1,2,3,4,5 IBM Code Page (CT=Graphics, IBM #1, #2) #437 ON ON ON ON ON #3844 ON OFF ON OFF ON #850 OFF ON ON ON ON #3845 OFF OFF ON OFF ON #860 ON OFF ON ON ON #3846 ON ON OFF OFF ON #861 OFF OFF ON ON ON #3847 OFF ON OFF OFF ON #863 ON ON OFF ON ON #3848 ON OFF OFF OFF ON #865 OFF ON OFF ON ON #852 OFF OFF OFF OFF ON #866 ON OFF OFF ON ON #737 ON ON ON ON OFF #3840 OFF OFF OFF ON ON #851 OFF ON ON ON OFF #3841 ON ON ON OFF ON #869 ON OFF ON ON OFF #3843 OFF ON ON OFF ON #928 OFF OFF ON ON OFF International Character Set (CT=Italics) U.S.A. ON ON ON ON ON Japan ON ON ON OFF ON France OFF ON ON ON ON Norway OFF ON ON OFF ON Germany ON OFF ON ON ON Denmark-2 ON OFF ON OFF ON England OFF OFF ON ON ON Spain-2 OFF OFF ON OFF ON Denmark-1 ON ON OFF ON ON Latin America ON ON OFF OFF ON Sweden OFF ON OFF ON ON Korea OFF ON OFF OFF ON Italy ON OFF OFF ON ON Ireland ON OFF OFF OFF ON Spain-1 OFF OFF OFF ON ON Legal OFF OFF OFF OFF ON F 1, 2, 3, 4, 5 NLQ Font Selection Roman ON ON ON ON ON Sanserif OFF ON ON ON ON Courier ON OFF ON ON ON Prestige OFF OFF ON ON ON Orator OFF OFF OFF ON ON Option Script ON ON OFF ON ON Cinema ON OFF OFF OFF ON OCR-B OFF ON OFF ON ON Code 39 OFF OFF OFF OFF ON OCR-A ON OFF OFF ON ON UPC/EAN ON ON ON ON OFF Orator-2 ON ON ON OFF ON Old-Stile OFF ON ON ON OFF TW-Light OFF ON ON OFF ON Firenze ON OFF ON ON OFF L-Gothic ON OFF ON OFF ON Arabic Naskh OFF OFF ON ON OFF Blippo OFF OFF ON OFF ON Arabic Koufi ON ON OFF ON OFF H-Gothic ON ON OFF OFF ON Arabic Naskh-Eilani OFF ON OFF ON OFF Orane OFF ON OFF OFF ON 9

14 GENERAL SPECIFICATIONS 4. Parallel Interface 4-1. General Specifications Item Interface Synchronization System I/F Protocol Logic Level Specifications Centronics-compatible Via externally supplied STROBE pulse Using ACK and BUSY signals Compatible with TTL level ACK 5µs 5µs t t t t Data STROBE (EDS B-6 : ON) STROBE (EDS B-6 : OFF) BUSY 4-2. Connector Signals t : More than 0.5µs Fig. 1-6 Timing Charts for Parallel Interface Pin Name Function 1 STROBE Goes low for 0.5µs when active. 2 DATA0 3 DATA1 4 DATA2 5 DATA3 6 DATA4 7 DATA5 8 DATA6 9 DATA7 These signals represent information for the 1st through 8th bit of parallel data, respectively. Each signal is HIGH when data is logical 1, and LOW when logical ACK 10µs low to acknowledge receipt of data. 11 BUSY Printer sets line low when ready to receive data. 12 PAPER High when paper runs out. 13 SELECT High when printer is on-line. 14 AFXT Printer ignores this signal. 15 Not used. 16 SIGNAL GND Signal ground 17 CHASSIS Chassis ground (isolated from signal ground) 18 +5V +5V DC output from printer 19~30 GND Twisted pair ground return 31 RESET Printer is reset when this signal goes low. 32 ERROR Low when printing cannot continue due to error. 33 EXT GND External ground 34~35 Not used 36 SELECT IN Printer ignores this signal. 10

15 GENERAL SPECIFICATIONS 5. Serial Interface (optional) When using the serial interface, the optional Serial-Parallel Converter must be connected to the printer General Specifications (SPC-8K) Interface RS-232C-level Synchronization Asynchronous Baud rate 150, 300, 600, 1200, 2400, 4800, 9600, BPS (selectable) Word length Start bit 1 Data bits 7 or 8 (selectable) Parity bit Odd, even, none (selectable) Stop bits One or more Signal polarity Mark Logical 1 (-3V to -15V) Space Logical 0 (+3V to +15V) Handshaking DTR, XON/XOFF, ETX/ACK Data buffer 8 kbytes (standard) (IS-8H192) Interface RS-232C-level only Synchronization Asynchronous Baud rate 150, 300, 600, 1200, 2400, 4800, 9600, BPS (selectable) Word length Start bit 1 Data bits 7 or 8 (selectable) Parity bit Odd, even, none (selectable) Stop bits One or more Signal polarity Mark Logical 1 ( 3V to 15V) Space Logical 0 (+3V to +15V) Handshaking DTR, XON/XOFF, ETX/ACK Data buffer 8 kbytes (standard) (IS-32H768) RS-232C Interface Synchronization Asynchronous Baud rate 150, 300, 600, 1200, 2400, 4800, 9600, BPS (selectable) Word length Start bit 1 Data bits 7 or 8 (selectable) Parity bit Odd, even, none (selectable) Stop bits One or more Signal polarity Mark Logical 1 ( 3V to 15V) Space Logical 0 (+3V to +15V) Handshaking DTR, XON/XOFF, ETX/ACK Data buffer 32 kbytes (standard) RS-422A Interface Synchronization Asynchronous Baud rate 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, BPS (selectable) Word length Start bit 1 Data bits 7 or 8 (selectable) Parity bit Odd, even, none (selectable) Stop bits One or more Signal polarity Mark Logical 1 (A is 0.2 V or less than B) Space Logical 0 (A is +0.2 V or more than B) Handshaking DTR, XON/XOFF, ETX/ACK Data buffer 32 kbytes (standard) 11

16 GENERAL SPECIFICATIONS 5-2. Connector Signal and Functional Descriptions (SPC-8K, IS-8H192) Pin No. Signal name Direction Function 1 GND Printer 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. 5 CTS This signal is space when the computer is ready to send data. The printer does not check this pin. 6 NC Unused. 7 GND Signal ground. 8~10 NC Unused. 11 RCH OUT The printer sets this signal to space when it is ready to receive data. This line carries the same signal as pin ~19 NC Unused. 20 DTR OUT The printer sets this signal to space when it is ready to receive data. 21~25 NC Unused DIP Switch Settings (SPC-8K, IS-8H192) Switch ON OFF 1 8 data bits 7 data bits 2 No parity Parity checked 3 4 Handshaking protocols see table below 5 Odd parity Even parity 6 7 Data transfer rate see table below 8 All switches are set to ON before 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 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 ON ON ON 12

17 GENERAL SPECIFICATIONS 6. EE-PROM mode 6-1. Outline These settings can be changed in the EE-PROM mode by writing data directly to the EE-PROM on the main logic board: Setting EE-PROM mode Send <ESC><SUB>(09)H command. Canceling EE-PROM mode Initialize the printer by sending 6-2. Explanation of special control codes Exits printer from EE-PROM mode and initializes the printer. Returns all data in the EE-PROM to the factory settings. After the buffer is cleared, the buzzer sounds. If the printer is powered off before the buzzer sounds, all data in the buffer is not cleared. If all data is not cleared from the buffer, operation is not guaranteed. Be sure to allow the buzzer to sound before you turn the printer off! <ESC>MWn Code Function Address Capacity <ESC>MW0 <data> Stores data into entire area of EE-PROM. 00H-7FH 128bytes <ESC>MW1nm Stores data (m) into the address (n) nh 1 byte <ESC>MW2<data> Stores auto-start software data into 40H-5EH 30bytes EE-PROM. 5FH-7DH 30bytes The data (m) used in the commands above are stored in the specified address in order (n). When the data to be stored exceeds the specified capacity, subsequent data are ignored. Data are stored in the EE-PROM according to the memory map. (See section 3. EDS mode setting and 6-3. EE-PROM Map.) After all data are stored, a beep indicates the completion of storage. If the printer is powered off during data storage, data stored before power off are valid, but subsequent operation of the printer is not guaranteed. Do not power off the printer while data is being stored! <ESC>MR Dumps all data in the EE-PROM to a hard copy. For an example of using these control codes, see section 6-4. For the corresponding EE-PROM addresses, see the EE-PROM memory map in section 3-2. EDS mode setting and 6-3 EE-PROM Map. 13

18 GENERAL SPECIFICATIONS 6-3. EE-PROM MAP Address Function Factory data 00H EDS setting FFH Bit Function 1 0 b0 Emulation STANDARD/EPSON IBM Character Table b1 Standard / EPSON mode Graphics Italics IBM mode IBM #2 IBM #1 b2 RAM Usage Input Buffer Download Buffer b3 Auto Sheet Feeder Not installed Installed b4 Paper out Detector Enabled Disabled b5 Multi-Part Mode Disabled Enabled 01H EDS setting FFH Bit Function 1 0 b0 Graphics Direction Bi-directional Uni-directional b1 Tear-off Disabled Enabled b2 Line Spacing 1/6" 1/8" b3 Auto LF with CR Disabled Enabled b4 Zero Style Normal Slashed b5 Strobe Timing Normal Reverse 02H EDS setting FFH Print Mode Print Pitch Function b0 b1 Function b2 b3 b4 Draft cpi HS-Draft cpi NLQ cpi cpi Proportional Bit Function 1 0 b5 Quiet Disabled Enabled 03H EDS setting FFH Page Length Function b0 b1 b2 b3 Function b0 b1 b2 b3 11"/Letter "/Legal " "/Executive "/A "/Executive " " "/Letter " Bit Function 1 0 b4 CR Centering Position Long Short 14

19 GENERAL SPECIFICATIONS Address Function Factory data 04H EDS setting FFH IBM Code Page (Character Table=Graphics, IBM#1, #2) Function b0 b1 b2 b3 b4 Function b0 b1 b2 b3 b4 # # # # # # # # # # # # # # # # # # # # International Character Set (Character Table=Italics) Function b0 b1 b2 b3 b4 Function b0 b1 b2 b3 b4 U.S.A Japan France Norway Germany Denmark England Spain Denmark Latin America Sweden Korea Italy Ireland Spain Legal H EDS setting FDH NLQ Font Selection Option Function b0 b1 b2 b3 b4 Function b0 b1 b2 b3 b4 Roman Script Sanserif OCR-B Courier OCR-A Prestige Orator Orator TW-Light L-Gothic Blippo H-Gothic Orane Cinema Code UPC/EAN Old-Style Firenze Arabic Naskn Arabic koufi Arabic Naskn-Eilani H (Not used) 00H 07H Misalignment correction 090 DPI (H) 80H 08H Misalignment correction 120 DPI (H) 80H 09H Misalignment correction 120 DPI (H) Graphics 80H 0AH Misalignment correction 144 DPI (H) 80H 15

20 GENERAL SPECIFICATIONS Address Function Factory data 0BH Misalignment correction 240 DPI (H) 80H 0CH Misalignment correction 240 DPI (H) Graphics 80H 0DH Misalignment correction 060 DPI (F) 80H 0EH Misalignment correction 072 DPI (F) 80H 0FH Misalignment correction 080 DPI (F) 80H 10H Misalignment correction 090 DPI (F) 80H 11H Misalignment correction 120 DPI (F) 80H 12H (Not used) 00H 13H Misalignment correction Multi-part Mode 090 DPI (H) 80H 14H Misalignment correction Multi-part Mode 120 DPI (H) 80H 15H Misalignment correction Multi-part Mode 120 DPI (H) Graphics 80H 16H Misalignment correction Multi-part Mode 144 DPI (H) 80H 17H Misalignment correction Multi-part Mode 240 DPI (H) 80H 18H Misalignment correction Multi-part Mode 240 DPI (H) Graphics 80H 19H Misalignment correction Multi-part Mode 060 DPI (F) 80H 1AH Misalignment correction Multi-part Made 072 DPI (F) 80H 1BH Misalignment correction Multi-part Made 080 DPI (F) 80H 1CH Misalignment correction Multi-part Made 090 DPI (F) 80H 1DH Misalignment correction Multi-part Made 120 DPI (F) 80H 1EH~2AH (Not used) 00H 2BH, 2CH Top Margin in Auto-loading Friction 48H 00H 2DH, 2EH Top Margin in Auto-loading Tractor 48H 00H 2FH, 30H Top Margin in Auto-loading ASF 48H 00H 31H Paper End Sensor A/D Valve 99H 32H~35H Macro set for Standard/EPSON Mode 00H 00H 36H~39H Macro set for IBM Mode 00H 00H 3AH, 3BH TEAR OFF (Short) 00H 80H 3CH, 3DH TEAR OFF (Long) 00H 80H 3EH, 3FH IBM Initial Condition Area FFH FFH 40H~5EH Auto Start Area for Standard/EPSON Mode 00H 00H 5FH~7DH Auto Start Area for IBM Mode 00H 00H 7EH <FF> Control Code (00H = Space / 0FH = Null) 00H 7FH EE-PROM Check Code 01H 16

21 GENERAL SPECIFICATIONS 6-4. Rewriting the EE-PROM Follow this procedure to rewrite the EE-PROM. (1) Turn the printer on. (2) Turn the computer on. (3) Load a BASIC disk in the computer. (4) Set a sheet of paper in the printer, and press the SET switch. (5) Enter the program listed below and run the program. 10 LPRINT CHR$(27);CHR$(26);CHR$(&H09) 20 LPRINT CHR$(27); MW1";CHR$(&H01);CHR$(&HFB) 30 LPRINT CHR$(27); MR BASIC Program Code What It Does 10 LPRINT CHR$(27);CHR$(26);CHR$(&H09) Enters the EE-PROM mode. 20 LPRINT CHR$(27); MW1"; Starts rewriting the EE-PROM. CHR$(&H01); Address data from &H01 will show EDS mode from the EE-PROM memory map. CHR$(&HFB) Data from &HFB will change the Line spacing from 1/6" to 1/8". 30 LPRINT CHR$(27); MR Dumps all EE-PROM data to hexadecimal. (6) To complete the setting, turn the printer off. 17

22

23 CHAPTER 2 THEORY OF OPERATION 1. Block Diagram General Flow Chart (Main Logic Board) Power Supply Circuit Mechanism Print Head Mechanism Print Head Carrying Mechanism Ink ribbon feed mechanism Paper Feed Mechanism Detectors... 28

24

25 THEORY OF OPERATION 1. Block Diagram The block diagram of this printer is shown in Fig Data (From Host Computer) Print head Parallel interface Driver Carriage motor LED Gate array Switch Control panel board Masked ROM 2M UVE-PROM 1M CPU Driver Detectors Paper feed motor Power supply unit EE-PROM RAM AC Power Main logic board Printer mechanism 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 it arrives. The CPU on this board reads the data from the RAM, and edits it according to the program stored in the ROM. When editing is completed, various drive signals from the CPU are sent to the printer mechanism to perform printing. Explanation CPU TMP90C041 Controls this printer. UVE-PROM 1M bit Contains the program which executes control of the printer. UVE-PROM is not provided with some versions of the software. Masked ROM 2M bit Contains the character font. EE-PROM KM93C bits Contains the data (EDS data and so on) in the memory switch. RAM 512K bit Used as a stack area, work area and data buffer of the CPU. Parallel interface Gate array (custom IC) Inputs/outputs several signals. 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 and motor drives. (2) Control panel board Panel circuit for manual control of the printer. (3) Printer Mechanism Consists of a print head, carriage motor, paper feed motor, and detectors. (4) Power Supply Unit Converts AC power to LC-1511:33VDC, LC-1521:35VDC and 5VDC. 21

26 THEORY OF OPERATION 2. General Flow Chart (Main Logic Board) The flow chart below shows you the general flow of editing and printing operations. POWER ON Initialization Ready state Read data Control code? No YES Control code processing Data storage NO Print? YES (Line buffer determination) Data processing or printing (Print out of data) NO Return? YES Return action Fig. 2-2 General Flow Chart of Editing and Printing 22

27 THEORY OF OPERATION 3. Power Supply Circuit A ringing choke converter type circuit is used with a dropper type circuit in the power supply unit, fulfilling the input and output conditions described in the chart below. Input Output Voltage Range Max. Current Output Service Circuit Type 110,120VAC 1.0 A 220Vto 240VAC 0.6 A 5 VDC ±5% 0.4 A For logic circuit Dropper drive, for motor holding. 33 VDC ±5%(LC-1511) 1.25A(LC-1511) For print head Ringing choke 35 VDC ±5%(LC-1521) 3.4A (LC-1521) drive, for motor drive. converter. Input 110VAC 120VAC 220VAC 230VAC 240VAC Noise filter circuit Switching section (Transistor Q1) In rush current protection circuit Rectifier circuit Ringing choke converter Out put 33V DC ; LC V DC ; LC-1521 Dropper circuit Out put 5V DC Transformer T1 Control circuit PC1 Voltage reference Photo-Coupler Fig. 2-3 Power Supply unit block diagram 23

28 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. Spring Paper guide Ink ribbon Paper Platen Stopper Needle wire Guide Subguide Clapper holder Iron core Print solenoid Clapper Fig. 2-4 Outline of Print Head Mechanism 24

29 THEORY OF OPERATION 4-2. Print Head Carrying Mechanism The print head carrying mechanism consists of a carriage, timing belt, carriage motor, and home position detector. Carriage The carriage is supported horizontally by the carriage stay and rear angle. The carriage 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. Timing Belt The timing belt is suspended between the timing pulley of the carriage motor and the timing pulley of the tension lever. The timing belt 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. Carriage Motor The carriage motor is a PM (permanent magnet) 4-phase, 48-pole pulse motor 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 (carriage carrying rate), the size of the horizontal letters can be changed in each print mode. Fig. 2-5 Print Head Carrying Mechanism 25

30 THEORY OF OPERATION 4-3. Ink ribbon feed mechanism The ink ribbon feed mechanism is linked to the print head carrying mechanism so the ink ribbon always winds automatically in the same direction while the carriage moves left and right. The movement of the carriage along the serrated edge of the rear angle of the printer mechanism drives the idler gear. The rotation of the idler gear is conveyed sequentially to the gears that work and wind the ribbon. The carriage has a clutch lever that keeps the direction of the cassette gear rotation constant, regardless of the direction of the idler gear rotation as the carriage moves left and right. Fig. 2-6 Ribbon feed mechanism 26

31 THEORY OF OPERATION 4-4. Paper Feed Mechanism The paper feed mechanism consists of a paper feed motor, an idler gear, a platen and a traction unit. The paper feed motor is a PM (Permanent Magnet) 4-phase and 48 pulse motor. There are two ways of feeding paper into the printer: the friction method and the tractor method. You can select the method you want to use by setting the release lever on the push tractor unit. Position of release lever [1] [2] Linkage between tractor gear Not linked Linked and PF idler gear Platen roller and Pinch roller Pressed Not Release lever position detector OFF ON Paper feeding method Friction Tractor (1) 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 Pinch 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 PF idler gear are not linked at this time, the tractor unit will not be driven. (2) 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 PF idler gear, enabling the drive force generated by the paper feed motor to be transferred to the tractor unit via the idler gear. Fig. 2-7 Paper Feed Mechanism 27

32 THEORY OF OPERATION 4-5. Detectors (1) Print head temperature detectors The A/D converter in the CPU detects the print head temperature at power on and before each line begins to print. +5V +5V VREF Thermistor L1 AN1 R1 L2 R2 CPU Control Method (by Text printing) Fig. 2-8 Printer head temperature detector circuit Print Temperature C (LC-1511) (LC-1521) Normal print ~ 120 ~ 110 Unidirectional print 120 ~ ~ 130 Print Stop Over 130 Over 130 (2) Home Position Detector A photo-interrupter is used in the home detector on the printer. ON/OFF signals are generated according to the position of the carriage. (Shield plate mounted at the base of the carriage.) The printing position is determined by these signals. +5V Detecting signal C1 R1 R2 +5V R3 Fig. 2-9 Carriage home position detector circuit Output (V) Decision 5 in home position (with shield plate) 0 not in home position (without shield plate) 28

33 THEORY OF OPERATION (3) Paper end Detector The paper end Detector is located in the paper chute unit. The A/D converter in the CPU detects the presence or absence of paper. VRef +5V R1 +5V Paper AN R2 C1 R3 CPU Fig Paper end detector circuit (4) Release lever switch +5V Detecting signal R1 R2 Leaf switch Fig Release lever switch circuit Control Method Output (V) Release Lever SW 0 Tractor 5 Friction 29

34

35 CHAPTER 3 ADJUSTMENTS This printer has undergone various adjustments so that it will attain a given standard of performance. In this chapter, a brief explanation is given of the methods for making adjustments. Follow the instructions when performing maintenance inspections or when replacing parts to correct malfunctions. 1. Adjustment of Gap Between Print Head and Platen Adjustment of Timing Belt Tension Dot Adjustment Adjustment of Paper end detector... 36

36

37 ADJUSTMENTS 1. Adjustment of Gap Between Print Head and Platen (1) Remove the Printer cover and ribbon holder [1]. (2) Loosen nut [3] using jig [2]. (3) Adjust the head gap at the specified left and right positions (two places). * Adjust by moving jig [5] forward or backward. * Use bushing [4] to adjust the gap on the left side until it equals that on the right side. Gap adjustment values: LC to 0.40mm LC to 0.35mm Be sure to adjust with the rear cover installed. (Adjustment with rear cover off will increase the gap by about 0.1mm.) (4) Hold jig [5] in place and push jig [2] toward the rear so as to tighten nut [3]. (5) Confirm that the setting is correct. Fig. 3-1 Mechanism gauge [8] 55mm Platen [6] 55mm Platen [6] L R Head gap Carriage [7] LC ~0.40mm LC ~0.35mm Fig. 3-2 Positioning the carriage unit Fig. 3-3 Gap measurement 33

38 ADJUSTMENTS 2. Adjustment of Timing Belt Tension (1) Remove the upper case unit according to the procedures described in chapter 4. (2) Loosen screw [1]. (3) Move the carriage [2] once from left to right, then return it to the left. (4) Set the tension gauge [3] to the position indicated in Fig. 3-5 below. (5) Using a regular screwdriver, move tension lever [4] to the right until it matches the minimum tension setting (23.0 if LC-1511; 28.0 if LC-1521). (6) Tighten screw [1]. (7) Confirm that the setting is correct. (8) Remove tension gauge [3]. Move the carriage [2] all the way to the right and then back to the left, and check the setting once again. Fig. 3-4 Gap measurement Platen Gauge lever position 0~10mm Timing belt Fig. 3-5 Positioning the carriage unit Fig. 3-6 Measuring tension 34

39 ADJUSTMENTS 3. Dot Adjustment Dot adjustment can be carried out from either the panel or the SETUP application. (1) Correction values 72H 7FH 80H 81H 8EH /720 (inch) 14/720 (inch) (2) Correction Mode HS-DRAFT DRAFT Double-Density / Speed Double-Desity Plotter GFraphics NLQ Quadruple-Density Normal Density Plotter-Graphics CRT Graphics-I CRT Graphics-II Double-Density 90DPI (H) 120DPI (H) Text 120DPI (H) Graphics 144DPI (H) 240DPI (H) Text 240DPI (H) Graphics 60DPI (F) 72DPI (F) 80DPI (F) 90DPI (F) 120DPI (F) (3) Adjustment from the panel [1] BANK [3] A 1 SW D 4 [2] [6] POWER [4] B 2 E 5 [7] MICRO FEED [5] C 3 FONT F 6 [8] PITCH SET/EJECT PARK FORM FEED LINE FEED [9] ON LINE [10] [11] [12] [13] [14] [15] EDS BANK SWITCH STATUS ON/OFF PRINT EXIT Selecting DOT ADJUSTMENT mode. Switch on the power while holding down both the FORM FEED SW [13] and the ON-LINE SW [15]. Setting the value and exiting the mode. FONT SW [10]: Adjust toward left (negative adjustment). PITCH SW [11]: Adjust toward right (positive adjustment). S/E/P SW [12]: Advance to next adjustment mode. ON-LINE SW [15]: Terminate DOT ADJUSTMENT mode. Pressing this switch terminates the mode and registers the new setting. If you terminate the mode without using this switch, the new setting will be lost. 35

40 ADJUSTMENTS 4. Adjustment of Paper end detector After replacing the paper-end detector, adjust the new detector as described here. First enter the dedicated command, then flow chart below. Dedicated command: <ESC> <SUB> (50)H n Automatic Sheet Feeder ; n=01 Tractor and Friction ; n=01 Send LPRIN CHR$(27);CHR$(26); CHR$(&H50);CHR$(01) command n = 01? No Yes Tractor or Friction? Friction Tractor or Friction? Tractor Tractor Friction Paper eject Paper Park Paper eject Paper out? No E Paper out? No E Paper out? No E Yes Yes Yes Enter paper-out value (A) Enter paper-out value (A) Enter paper-out value (A) Loading cut-sheet paper Loading fanfold paper No Press paper feed switch Yes Paper in? No E Paper in? No E Loading cut-sheet paper Yes Yes A B C 36

41 ADJUSTMENTS A B C Paper in? No E Yes Enter paper-in value (B) Find average (center value) of (A) and (B) Nomal range? No YES Print the new Paper end detector A/D value ** PAPER END SENSOR : ** E Adjustment error / New value not recorded (3beeps) Register the new Paper end detector A/D value (1 beep) Fanfold paper: From feed Cut-sheet paper: Eject paper 37

42

43 CHAPTER 4 PARTS REPLACEMENT This chapter explains disassembly and reassembly of the printer. Note the following regarding disassembly and reassembly. 1. Disconnect the printer from the wall outlet before servicing it. 2. Assy 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 section 2 in chapter Push Tractor Unit Upper Case Unit Printer Machanism Main Logic Board Unit Power Supply Unit Fuse Print Head Carriage Motor Unit Platen Unit Detector Unit...46

44

45 PARTS REPLACEMENT 1. Push Tractor Unit (1) Turn OFF the power switch. (2) Remove the power cord from the AC output socket. (3) Remove Printer cover Rear cover unit [1] Push tractor unit [2] Set the release lever [3] to FRICTION. Lift the hook [4] at each side of the push tractor. 2. Upper Case Unit (1) Remove Push tractor unit as described above1. Platen knob unit [1] Four screws [2] (2) Move the carriage unit to the right. (3) Remove Upper case unit [3] Pull the upper case unit [3] forward and remove it from the hooks [4]. Control board [5] Detach the two hooks. Caution regarding assembly; When carrying out reassembly, pay due attention to the upper case unit s internal sheet and the mechanism s detector. 41

46 PARTS REPLACEMENT 3. Printer Machanism (1) Remove Upper case unit as described above 2. (2) Move the carriage unit to the left. (3) Remove Cable holder [1] Two head cable [2] Six screws [3] Two screws [4] Printer mechanism [5] Remove the connectors from the main logic board. Caution regarding assembly; Cross CN5 over when connecting. CN6 Cross over CN5 Attach the head cable [2] as illustrated at right. Slide into position. 4. Main Logic Board Unit (1) Remove Printer mechanism as described above 3 Connector [1] Four screws [2] Home position board [3] Main logic board unit [4] Caution regarding assembly; Be sure that the height and angle of the main-logicboard transistors (TR14, 15, 16) and the controlboard LEDs are within the limits indicated below. (Height for TR14,15,16) (LED angle) θ < = ±10 θ 12.5mm max. 1.3mm max. Main logic board Control board Be sure that the ground spring at the rear of the main logic board has a height of at least 7.3mm. 7.3mm 42 Ground spring

47 PARTS REPLACEMENT 5. Power Supply Unit (1) Remove Upper case unit as described above 2. Three screws [1] Screw [2] Power supply unit [3] 6. Fuse (1) Remove Upper case unit as described above 2. (2) Inspect Fuse F1 Defective Replace fuse as follows: LC-1511 AC voltage Fose Type 110/120V 5TT2A-250V 220V to 240V 215-1A-250V LC-1521 AC voltage Fose Type 110/120V 5TT5A-125V 220V to 240V A-250V 43

48 PARTS REPLACEMENT 7. Print Head (1) Remove Top guide unit [1] Colour ribbon holder assy [2] Cable holder [3] Ribbon holder [4] Two screws [5] Print head [6] WARNING The print head gets hot after printing. Do not touch it until it cools. (2) Adjust Gap between print head and platen. Refer to section 1 of Chapter 3. Note: Fold the head cables according to the dimensions shown below Connector face Size : mm 44

49 PARTS REPLACEMENT 8. Carriage Motor Unit (1) Remove Printer mechanism as descrbed above 3. (2) Loosen the screw [1]. (3) Remove Two screws [2] Carriage motor unit [3] (4) Adjust For details about belt-tension adjustment, refer to section 2 of Chapter Platen Unit (1) Remove Upper case unit as described above 2. Top guide unit [1] Stack guide unit [2] The stack guide unit may break if it is forcibly removed. Therefore, hold the gears tightly when removing the stack guide unit. Idler gear [3] PF idler gear [4] Spring [5] Stop ring [6] Platen unit [7] Move the platen holder as shown in the diagram below and remove the platen unit. Platen Holder Fig.a Fig.b 45

50 PARTS REPLACEMENT 10. Detector Unit (1) Remove Platen unit as described above 9. (2) Turn over the printer mechanism. (3) Remove Paper chute unit [1] Remove the nine paper sheet hooks [3] on the bottom of the frame base assembly [2] and remove the Paper chute unit [1]. Detector unit [4] 46

51 CHAPTER 5 MAINTENANCE AND LUBRICATION 1. Maintenance Cleaning Checks Lubrication Lubricant Lubricating Method Lubricated Areas

52

53 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 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 Checks Checks must be carried out at two levels: a daily check which the operator can easily carry out during operation, and a 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. 49

54 MAINTENANCE AND LUBRICATION 2. Lubrication Lubrication is very important to maintain optimum performance and to prevent trouble 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 Type of oil Product name Maker Grease MOLYKOTE EM-30L DOW CORNING ASIA LTD Lubricant Mobil 1 Mobil oil Silicone oil KF CS Shin Etsu Chemicals Industry Co, LTD 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 Lubricated Areas NO. LubricationProduct Name [1] Rubbing surfaces of Felt Mobil 1 [2] Rubbing surfaces of Frame R and Adjusting lever EM-30L [3] Rubbing surfaces of Platen and Platen spping EM-30L [4] Rubbing surfaces of Frame R, L and Stack guide EM-30L [5] Rubbing surfaces of Carriage unit and Color ribbon holder EM-30L [6] Rubbing surfaces of Carrige stay Mobil 1 [7] Rubbing surfaces of Pully shaft and Pully EM-30L [8] Rubbing surfaces of Frame R and RF idler gear EM-30L [9] Rubbing surfaces of Tractor shaft EM-30L [10] Rubbing surfaces of Release lever and Tractor frame L EM-30L [11] Rubbing surfaces of Roller shaft EM-30L [12] Rubbing surfaces of Shaft EM-30L [13] Rubbing surfaces of Ribbon shaft lever KF CS [14] Rubbing surfaces of Gear EM-30L [15] Rubbing surfaces of Shift cam EM-30L [16] Rubbing surfaces of back of Gear cover EM-30L [17] Rubbing surfaces of PF idler gear and shaft of Tractor Fram R EM-30L [18] Rubbing surfaces of Tactor shaft EM-30L [19] Rubbing surfaces of Feed roller shaft and Fram L, R EM-30L 50

55 MAINTENANCE AND LUBRICATION Fig. 5-1 Lubricated Areas (printer mechanism) 51

56 MAINTENANCE AND LUBRICATION Fig. 5-2 Lubricated Areas (Frame R unit) Fig. 5-3 Lubricated Areas (push tractor unit) 52

57 MAINTENANCE AND LUBRICATION (LC-1511) (LC-1521) (Shift cum) (Back side of gear cover) Fig. 5-4 Lubricated Areas (Carriage unit) 53

58 MAINTENANCE AND LUBRICATION Fig. 5-5 Lubricated Areas (Pull tractor unit) Fig. 5-6 Lubricated Areas (ASF) 54

59 CHAPTER 6 TROUBLESHOOTING 1. Troubleshooting Procedures Unit Replacement Priority Chart Repair by Unit Replacement Repair by Parts Replacement Does not Operate at All with Power on Power Supply Circuit Abnormal Defective Motor Operation Defective Print Head Operation Defective Interface Operation

60

61 TROUBLESHOOTING 1. Troubleshooting Procedures Troubleshooting is never easy because various problems arise depending upon the particular location of the breakdown. The following procedures should be taken in making repairs. (1) The first method is to make 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) 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 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 priority chart. (2) The second method is to make repairs 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) All check items shown in the flow chart must be checked. 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, restart the job from the beginning. (Note 5) Be careful to avoid injury from static electricity when handling ICs and main logic board. 57

62 TROUBLESHOOTING 2. Unit Replacement Priority Chart Category Operation related Motor related Print head related Detector related Interface related and others Error indication 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 EDS setting Faulty operation when power is turned on/off Abnormal motor operating speed (slow) Fuse blown during operation Error detection of head temperature Carriage motor error Paper handling error EE-PROM & RAM error Watch dog timer error Power supply unit 2 3 Unit Exchange Sequence Main logic board Printer mechanism Control panel board 1 1 Remarks Replace ink ribbon Check I/F cable DRAFT lamp blink ROMAN lamp blink COURIER lamp blink 10CPI lamp blink PROP lamp blink Note: The figures 1, 2 and 3 mean the priority of replacement. 58

63 TROUBLESHOOTING 3. Repair by Unit Replacement START * Turn power off. * Remove I/F cable. * Mount ink ribbon. * Set paper. * Move carriage to center. A Turn power on. Carriage Moves? NO B YES Carriage operates normally? YES NO Carriage motor operating waveform is normal? *1 NO *1 See (8) and (9) waveform in item 7 of Chapter 7. YES Replace printer mechanism. 1) Replace main logic board. 2) Replace printer mechanism. Carriage stops at home position? (left side) NO A YES Home position switch signal is normal? NO YES Replace main logic board. 1) Replace main logic board. 2) Replace printer mechanism. 1 A 59

64 TROUBLESHOOTING 1 On line lamp light? NO YES On line lamp signal is normal? NO Press on line switch to take off line. YES Replace control panel board. Replace main logic board. On line lamp is out? YES NO A Press paper feed switch. E Paper feed switch operation is normal? YES NO Paper feed motor drive waveform is normal? *2 *2 See (10),(11) and (12),(13)waveform in item 7 of Chapter 7. NO Turn power off. YES 1) Replace main logic board. 2) Replace printer mechanism. Holding paper feed switch, turn power on. Self printing: Replace printer mechanism. A Carriage operates normally? YES NO Carriage motor drive waveform is normal? *1 YES *1 See (8) and (9) waveform in item7 of Chapter 7. NO 1) Replace main logic board. 2) Replace printer mechanism. 2 Replace printer mechanism. A 60

65 TROUBLESHOOTING 2 Printing operation is normal? YES NO Print head drive signal waveform is normal? *3 YES *3 See (4),(5) and (6),(7) waveform in item 7 of Chapter 7. NO 1) Replace main logic board. 2) Replace printer mechanism. Replace printer mechanism. A Paper feed operation is normal? YES Ribbon feed operation is normal? YES NO NO 1) Replace ink ribbon. 2) Replace printer mechanism. Paper feed NO motor drive waveform is normal? *2 *2 See (10),(11) and (12),(13) waveform in item 7 of Chapter 7. YES Replace printer mechanism. NO 1) Replace main logic board. 2) Replace printer mechanism. Terminates self printing. Check host computer connection. A A Turn power off and check I/F cable. C Turn power on. Send print program from host computer. 3 61

66 TROUBLESHOOTING 3 Printing begins? NO D YES Printing operation normal? NO YES Stop print program. 1) Replace I/F cable. 2) Replace main logic board. 3) Check host computer. END B C Carriage moves with hand? YES NO Replace printer mechanism. Output (+33/35V, +5V) of power supply unit is normal? *4 NO Turn power off. Fuse blows out? YES NO 1) Replace main logic board. 2) Replace printer mechanism. 3) Replace control panel board. YES Replace fuse. Replace power supply unit. Remove connector CN7 from main logic board A Turn power on. 4 *4 Power Supply Unit LC V Line +33V ± 5% Between Pin 4 and Pin 3 of CN101 +5V Line +5V ± 5% Between Pin 1 and Pin 2 of CN101 LC V Line +35V ± 5% Between Pin 4 and Pin 5 of CN1 +5V Line +5V ± 5% Between Pin 1 and Pin 2 of CN1 62

67 TROUBLESHOOTING 4 Output of power supply unit is normal? *4 NO YES Turn power off. Replace power supply unit. Connect connector CN7 from main logic board Turn power on. Fuse blows out? NO YES Replace fuse. 1) Replace main logic board. 2) Replace printer mechanism. 3) Replace control panel board. A *4 Power Supply Unit LC V Line +33V ± 5% Between Pin 4 and Pin 3 of CN101 +5V Line +5V ± 5% Between Pin 1 and Pin 2 of CN101 LC V Line +35V ± 5% Between Pin 4 and Pin 5 of CN1 +5V Line +5V ± 5% Between Pin 1 and Pin 2 of CN1 63

68 TROUBLESHOOTING D *5 See (14) waveform in item 7 of Chapter 7. I/F signal is normal? *5 YES NO Ready condition? NO YES There is data transmission? YES NO Check hardware or host computer print program. I/F mode set up properly? YES NO Change I/F mode. 1) Replace I/F cable. 2) I/F cartridge 3) Replace main logic board. C A E On line switch goes ON/OFF? YES On line lamp drive signal is normal? NO NO YES Replace control panel board. Replace main logic board. 1) Replace control panel board. 2) Replace main logic board. A 64

69 TROUBLESHOOTING 4. Repair by Parts Replacement 4-1. Does not Operate at All with Power on START +33/35V, +5V are supplied? *1 YES NO DC Power abnormal. See 4-2. Power Supply Circuit Abnormal. RESET signal becomes HIGH? *2 NO YES Check RESET circuit; replace parts. Crystal waveform is normal? *3 NO YES Check crystal circuit; replace parts. ROM OE signals become LOW? NO YES Carriage motor abnormal. 1) Replace CPU or ROM. 2) Check relevant circuit. Check operation. END *2 See (2) waveform in item 7 of Chapter 7. *3 See (1) waveform in item 7 of Chapter 7. *1 Power Supply Unit LC V Line +33V ± 5% Between Pin 4 and Pin 3 of CN101 +5V Line +5V ± 5% Between Pin 1 and Pin 2 of CN101 LC V Line +35V ± 5% Between Pin 4 and Pin 5 of CN1 +5V Line +5V ± 5% Between Pin 1 and Pin 2 of CN1 65