Star Micronics SP320S series Technical Manual
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Star Micronics SP320S series Technical Manual

Star Micronics SP320S series Technical Manual

Dot matrix printer
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DOT MATRIX PRINTER
SP320S SERIES
TECHNICAL MANUAL
[SECOND EDITION]

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Summary of Contents for Star Micronics SP320S series

  • Page 1 DOT MATRIX PRINTER SP320S SERIES TECHNICAL MANUAL [SECOND EDITION]...

  • Page 3: Table Of Contents

    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 1993 Star Micronics Co.,Ltd. CONTENTS...
  • Page 5 GENERAL DESCRIPTION 1.1 General description ... 1.2 Model name notation ... 1.3 Instructions apply models ... GENERAL DESCRIPTION CHAPTER 1...

  • Page 7: General Description

    1.1 General description This manual describes the SP320S series dot matrix printers listed in section 1.3. The manual includes sections on principles of operation, adjustments, part replacement, maintenance and lubrication as well as a list of parts. This manual has been prepared for use by a maintenance staff carrying out regular inspections or repairs when abnormalities occur.

  • Page 8: Instructions Apply Models

    GENERAL DESCRIPTION 1.3 Instructions apply models Serial interface SP321SD28-120 SP321SD28-220 SP321SD28-230 SP321SD28-240 SP322SD40-120 SP322SD40-220 SP322SD40-230 SP322SD40-240 SP323SD35-120 SP323SD35-220 SP323SD35-230 SP323SD35-240 Parallel interface SP321SC28-120 SP321SC28-220 SP321SC28-230 SP321SC28-240 SP322SC40-120 SP322SC40-220 SP322SC40-230 SP322SC40-240 SP322SC35-120 SP323SC35-220 SP323SC35-230 SP323SC35-240...

  • Page 22: Chapter 2 Theory Of Operation

    THEORY OF OPERATION 2.4.2 Print Head Carriage Mechanism This print head carriage mechanism consists mainly of the carriage, carriage motor, gear train, home position detector, and timing detectors. When the carriage motor rotates, the drive shaft (cylindrical cam) is rotated by the reduction gear.
  • Page 25 2.4.4 Ink Ribbon Feed Mechanism The ink ribbon feed mechanism comprises of the ribbon cartridge, the carriage motor, and the gear train. The gear train transmits the rotation of the carriage motor to the bevel gear. the ribbon is contained in the ribbon cartridge and tied into an endless loop.

  • Page 32: Adjustments

    ADJUSTMENT 3.3 Adjusting the Print Speed The printing speed is critical to ensure maximum reliability of the printer. If the printing is too fast, the print head cannot keep up and the wires get caught on the ribbon. 1. Remove the printer mechanism according to the procedure described in Section 4.2. 2.

  • Page 41: Parts Replacement

    PARTS REPLACEMENT 4.9 Terminal Board Unit Remove • Printer mechanism according to the procedure described in Section 4.2. • The ten soldered lead wires 1 with the soldering iron. • Two screws 2 • Terminal board unit 3 Adjust • Column displacement (Refer to Section 3.4.) 4.10 Carriage Motor Unit Remove...
  • Page 43 PARTS REPLACEMENT 4.13 Gears Remove • Upper case unit according to the procedure de- scribed in Section 4.1. • Stop ring SE4 1 • Gear 2 • Gear 3 • Gear 4 Assembly (Ver.1) Move the carriage to the left end. Align the gear wheels so that the cut-out section of the drive shaft and one end of the cut-out section of the timing pulse plate are facing upward as shown in the figure.

  • Page 50: Chapter 5 Maintenance And Lubrication

    MAINTENANCE AND LUBRICATION Fig. 5-1. Lubrication and screw sealing positions...

  • Page 53: Parts List

    HOW TO USE PARTS LIST 1. DRWG. NO. This column shows the drawing number of the illustration. 2. REVISED EDITION MARK This column shows a revision number. Part that have been added in the revised edition are indicated with “#”. Part that have been abolished in the revised edition are indicated with “*”.

  • Page 54: Printer Assembly

    PARTS LIST 6.1 Printer Assembly 6.1.1 Assembly Drawing A. SP321SD, SP322SD, SP323SD...
  • Page 55 PARTS LIST B. SP321SC, SP322SC, SP323SC...
  • Page 56 6.1.2 Parts List DRWG.NO. REV. PARTS NO. 89113120 PRINTER MECHANISM MP321S-24 89113140 PRINTER MECHANISM MP322S-24 89113160 PRINTER MECHANISM MP323S-24 87211060 LOWER CASE UNIT 82011310 POWER CHASSIS 87212240 CONTROL BOARD UNIT 87212260 CONTROL BOARD UNIT 82902230 GROUND PLATE 87213090 POWER SUPPLY UNIT 87213100 POWER SUPPLY UNIT 87213230...
  • Page 57 PARTS LIST DRWG.NO. REV. PARTS NO. 83912240 GUIDE CAP R 83912251 GUIDE CAP L 01914036 SCREW TR 4-5 WS 04020016 STOP RING SE4.0 09990723 FERRITE CORE TFC-23-11-14 04991204 FASTENER T18S PARTS NAME Q’TY SP321S FOR EC SP321S FOR EC FOR EC SP321,SP323 EC,UK EC,UK...

  • Page 58: Printer Mechanism

    PARTS LIST 6.2 Printer Mechanism 6.2.1 Assembly Drawing MP321S, MP322S, MP323S...
  • Page 59 PARTS LIST 6.2.2 Parts List DRWG.NO. REV. PARTS NO. 89130040 PRINT HEAD DP8901D 87110190 FRAME UNIT 87111190 DRIVE SHAFT UNIT 87111170 DRIVE SHAFT UNIT 87111200 DRIVE SHAFT UNIT 81210240 ADJUSTING COLLAR 80203041 DRIVE SHAFT BEARING 83100940 DRIVE SHAFT GEAR 87111182 CARRIAGE UNIT 87111183 CARRIAGE UNIT...
  • Page 60 DRWG.NO. REV. PARTS NO. 00820404 SCREW TR 2-4 01902612 SCREW TAT 2.6-16 PT 00630404 SCREW TR 3-4 01903048 SCREW TR 3-5 WF 02020301 HEXAGON NUT NH3-2 04020010 STOP RING SE2.0 04020015 STOP RING SE3.0 04020016 STOP RING SE4.0 04020017 STOP RING SE5.0 04020004 STOP RING SE2.5 83101050...

  • Page 61: Sub-Assembly

    PARTS LIST 6.3 Sub-assembly 6.3.1 Upper Case Unit DRWG.NO. REV. PARTS NO. 13-1 87210330 CONTROL PANEL ASSY 13-2 87210320 MICRO SWITCH ASSY 87210340 MICRO SWITCH ASSY 13-3 80087310 OPERATION SHEET 80087312 OPERATION SHEET 13-4 80084240 BRAND PLATE 13-5 83024950 UPPER CASE 83024952 UPPER CASE 13-6...

  • Page 62: Lower Case Unit

    6.3.2 Lower Case Unit DRWG.NO. REV. PARTS NO. 83024960 LOWER CASE 83024961 LOWER CASE 09090048 LEAF SWITCH MPS10130B 81310750 MECHANISM HOLDER PIN PARTS NAME Q’TY SP321S SP321S 8340 PARTS LIST REMARKS RANK...

  • Page 63: Wiring Schematic Of Printer

    PARTS LIST 6.4 Wiring Schematic of Printer 6.4.1 For Serial Interface 6-10...

  • Page 64: For Parallel Interface

    PARTS LIST 6.4.2 For Parallel Interface 6-11...

  • Page 65: Main Logic Board

    PARTS LIST 6.5 Main Logic Board 6.5.1 Serial Interface 6.5.1.1 Circuit Diagram 6-12...
  • Page 66 PARTS LIST 6-13...
  • Page 67 PARTS LIST 6-14...
  • Page 68 PARTS LIST 6-15...
  • Page 69 PARTS LIST 6.5.1.2 Component Layout 6-16...
  • Page 70 6.5.1.3 Parts List DRWG.NO. REV. PARTS NO. 08200140 IC-I/F D4712AGT 08200156 IC-I/F D4712AGT*E2 08250009 08210116 TTL IC 74LS06 (FLAT TYPE) 08210144 TTL IC 74LS06FP*TL 08240019 GATE ARRAY LC92011B-SP300 08200109 IC-RESET M51953BL 08222026 EPROM 09110024 IC SOCKET ICS-28-2T 08221021 SRAM 08221043 SRAM 08230038 CMOS...
  • Page 71 PARTS LIST DRWG.NO. REV. PARTS NO. 06054725 RD RESISTOR 4.7 K-OHM 1/6W 06054734 RD RESISTOR 47 K-OHM 1/6W 06056834 RD RESISTOR 68 K-OHM 1/6W R18-19 06054734 RD RESISTOR 47 K-OHM 1/6W R20-21 06054725 RD RESISTOR 4.7 K-OHM 1/6W 06058224 RD RESISTOR 8.2 K-OHM 1/6W 06054725 RD RESISTOR 4.7 K-OHM 1/6W 06058224...
  • Page 72 DRWG.NO. REV. PARTS NO. 05152234 CERA. CAPA. 0.022UF 50V 05152212 CERA. CAPA. 05152234 CERA. CAPA. 0.022UF 50V 05154714 CERA. CAPA. C22-23 C24-25 05151034 CERA. CAPA. 0.01UF 05152234 CERA. CAPA. 0.022UF 50V 05131044 CERA. CAPA. 05252232 FILM CAPA. 0.022UF C30-33 05151015 CERA.

  • Page 73: For Parallel Interface

    PARTS LIST 6.5.2 For Parallel Interface 6.5.2.1 Circuit Diagram 6-20...
  • Page 74 PARTS LIST 6-21...
  • Page 75 PARTS LIST 6-22...
  • Page 76 PARTS LIST 6-23...
  • Page 77 PARTS LIST 6.5.2.2 Component Layout 6-24...
  • Page 78 6.5.2.3 Parts List DRWG.NO. REV. PARTS NO. 08250009 08210116 TTL IC 74LS06 (FLAT TYPE) 08210144 TTL IC 74LS06FP*TL 08210113 TTL IC 74LS05 (FLAT TYPE) 08210142 TTL IC 74LS05FP*TL 08240019 GATE ARRAY LC92011B-SP300 08200109 IC-RESET M51953BL 08222026 EPROM 09110024 IC SOCKET ICS-28-2T 08221021 SRAM 08221043...
  • Page 79 PARTS LIST DRWG.NO. REV. PARTS NO. R14-21 06054725 RD RESISTOR 4.7 K-OHM 1/6W 06051034 RD RESISTOR 10 K-OHM 1/6W R23-24 06054725 RD RESISTOR 4.7 K-OHM 1/6W 06054734 RD RESISTOR 47 K-OHM 1/6W 06054725 RD RESISTOR 4.7 K-OHM 1/6W 06056834 RD RESISTOR 68 K-OHM 1/6W R30-31 R32-33 06054725...
  • Page 80 DRWG.NO. REV. PARTS NO. 05131044 CERA. CAPA. C5-8 05151015 CERA. CAPA. C9-12 05151033 CERA. CAPA. 0.01UF C14-15 05154714 CERA. CAPA. C17-18 05152234 CERA. CAPA. 0.022UF 50V 05154714 CERA. CAPA. C21-22 05151034 CERA. CAPA. 0.01UF 05131044 CERA. CAPA. 05152234 CERA. CAPA. 0.022UF 50V 05154714 CERA.

  • Page 81: Control Panel Board

    PARTS LIST 6.6 Control Panel Board 6.6.1 Circuit Diagram 6.6.2 Component Layout 6.6.3 Parts List DRWG.NO. REV. PARTS NO. LED1 08300058 LED LT-1E21A LED2 08300081 LED LT-1D11A R1-3 06052714 RD RESISTOR 270 OHM 1/6W SW1-2 09010041 PUSH SWITCH SKHHAL 09100518 CONNECTOR 53025-0810 93930001 JUMPER WIRE STP123...

  • Page 82: Power Supply Unit (Except For H.k.)

    PARTS LIST 6.7 Power Supply Unit (Except for H.K.) 6.7.1 Circuit Diagram 6-29...
  • Page 83 PARTS LIST 6.7.2 Component Layout 6-30...
  • Page 84 6.7.3 Parts List DRWG.NO. REV. PARTS NO. 08202016 IC-REG 7573BS 08990220 DIODE STACK D3SB10 08990227 DIODE STACK D3SB20 06214721 RN RESISTOR 4.7 K-OHM 1W 06230021 RN RESISTOR 0.22 OHM 3W 06201022 RN RESISTOR 1 K-OHM 2W 06230031 RN RESISTOR 0.33 OHM 3W 05291045 FILM CAPA.

  • Page 85: Power Supply Unit (For H.k)

    PARTS LIST 6.8 Power Supply Unit (For H.K.) 6.8.1 Circuit Diagram 6-32...
  • Page 86 6.8.2 Parts List DRWG.NO. REV. PARTS NO. 08202008 IC-REG L4960 08202024 IC-REG PQ05RF11 D1-4 08000040 DIODE DSM1D1 08030016 SCHOTTKY DIODE ERB84-009 08990227 DIODE STACK D3SB20 R1-2 06041031 RD RESISTOR 10 K-OHM 1/4W 06242031 RN RESISTOR 20 K-OHM 1/4W 1% 06245121 RN RESISTOR 5110 OHM 1/4W 1% 05291045 FILM CAPA.
  • Page 87 PARTS LIST 6.9 Terminal Board 6.9.1 Circuit Diagram 6-34...

  • Page 88: Component List

    PARTS LIST 6.9.2 Component List Ver. 1 Ver. 2 6-35...

  • Page 89: Parts List

    PARTS LIST 6.9.3 Parts List DRWG.NO. REV. PARTS NO. 08200128 IC-MOTOR M51971L 07227852 TRANSISTOR 2SC2785FE 07601002 TRANSISTOR 2SC3198GR* 07316371 TRANSISTOR 2SD1637 06242038 RN RESISTOR 20 K-OHM 1/4W 06242034 RN RESISTOR 20 K-OHM 1/4W 1% 06041228 RD RESISTOR 1.2 K-OHM 1/4W 06041226 RD RESISTOR 1.2 K-OHM 1/4W 06051035...

  • Page 90: Circuit Diagram

    6.10 Home Position Detector Board 6.10.1 Circuit Diagram 6.10.2 Component Layout 6.10.3 Parts List DRWG.NO. REV. PARTS NO. 06052211 RD RESISTOR 220 OHM 1/6W 08300107 PHOTO-INTERRUPTER ON1004-R 80701080 WIRE 26UL1571GRN030 80700620 WIRE 26UL1571GRN050 80701070 WIRE 26UL1571ORG045 80700580 WIRE 26UL1571ORG050 80700590 WIRE 26UL1571YEL065 PARTS NAME Q’TY...

  • Page 91: Circuit Diagram

    PARTS LIST 6.11 RS422 Interface Board (BD320K): option 6.11.1 Circuit Diagram 6.11.2 Component Layout 6.11.3 Parts List DRWG.NO. REV. PARTS NO. 08200131 IC-I/F MC34051P RA1-2 R1-4 ZNR1-3 ZNR4 05532234 CAPACITOR 0.022UF 25V ZNR5-11 ZNR12 05532234 CAPACITOR 0.022UF 25V 05532234 CAPACITOR 0.022UF 25V 09100430 CONNECTOR IL-W24S-SD HOLE...

  • Page 92: Circuit Diagram

    6.12 Current loop Board (BD320L): option 6.12.1 Circuit Diagram 6.12.2 Component Layout 6.12.3 Parts List DRWG.NO. REV. PARTS NO. 08210001 TTL IC 74LS00 08300032 OPTCOUPLER PS2401-2 07227851 TRANSISTOR 2SC2785JHFE 08000001 DIODE 1S1588 08000096 DIODE 1S2076A*A 06051514 RD RESISTOR 150 OHM 1/6W 06051034 RD RESISTOR 10 K-OHM 1/6W 06054725...
  • Page 94 ELECTRONIC PRODUCTS DIVISION OVERSEAS SUBSIDIARY COMPANIES STAR MICRONICS CO., LTD. STAR MICRONICS AMERICA, INC. 536 Nanatsushinya, 70-D Ethel Road West, Shimizu, Shizuoka, 424 Japan Piscataway, NJ 08854 U.S.A Tel : 0543-47-0112 Tel : 908-572-9512 Fax : 0543-48-5271 Fax : 908-572-5095...

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