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OKIDATA ML320 Turbo, Service Manual

The Oki ML320 Turbo is a reliable dot matrix printer perfect for small businesses and home offices. This user-friendly device comes with a comprehensive Guía Del Usuario manual for easy setup and troubleshooting. Download the manual for free from manualshive.com to maximize the functionality of your printer.

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P/N 
50062301

Cover: Head Cable 
Access

Both

RSPL

A B C

B.2.06 08

Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business 
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Summary of Contents for ML320 Turbo

Page 1: ...l 09 17 97 Note This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi which is ideal for printing but does not view on most displays well Co...

Page 2: ...ples of Operation 2 1 Printer Overview 17 2 2 Circuit Board Description 18 2 2 01 Operator Panel Board 19 2 2 02 Power Supply 20 2 2 03 Control Board 21 Large Scale Integrated Circuitry LSI 22 2 3 Ele...

Page 3: ...onnect Module Cable Guide Rev C 57 Power Interconnect Module Cable Guide Rev D 58 3 2 12 Indicator Assembly Bail Bar Assembly 59 3 2 13 Head Cable Access Cover 60 3 2 14 Ribbon Drive Assembly 61 3 2 1...

Page 4: ...97 4 7 Hexadecimal Dump Procedure 98 4 8 Resistance Service Checks Index To Charts 99 4 8 02 Interconnect Diagrams Rev A B 100 Interconnect Diagrams Rev C 101 Interconnect Diagrams Rev D 102 4 8 03 P...

Page 5: ...nents Rev A and B 133 B 2 04 Electrical Components Rev C 134 B 2 05 Electrical Components Rev D 135 B 2 06 Printer Mechanism Rev A and B 1 of 2 136 B 2 07 Printer Mechanism Rev A and B 2 of 2 137 B 2...

Page 6: ...book P N 59263401 Second Revision July 1994 Microline 320 321 Service Handbook Written and produced by the Okidata Technical Training Group Please address any comments on this publication to Technical...

Page 7: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 8: ...Chapter 0 About This Manual Manual Part Number and Revision Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to thi...

Page 9: ...ine 320 can handle 80 print columns at 10 CPI The Microline 321 can print up to 136 columns at 10 CPI The standard interface is a Centronics parallel and an optional RS232 C serial interface can be in...

Page 10: ...nd B units The Rev A and Rev B main control board LXMC and power supply board PAII cannot be used in Rev C units Rev D units do NOT use Rev A Rev B or Rev C main control boards transformers operator p...

Page 11: ...oard 55047402 Power Supply Board Yes Ye s Ye s No N A N A Power supply function included on the Main Control Board No No No Ye s Operator Panel Assembly Item Okidata P N Purpose Function of Item A B C...

Page 12: ...Module 55328301 Connects power supply board to main board Yes Ye s No No Cable Item Okidata P N Purpose Function of Item A B C D Cable 56616802 Connects power supply board to main board No No Ye s No...

Page 13: ...ddle Cover Microline 320 Yes Ye s Ye s No Chassis 50061201 Middle Cover Microline 321 Yes Ye s Ye s No Chassis 50104501 Middle Cover Microline 320 with SSD No No No Ye s Chassis 50104601 Middle Cover...

Page 14: ...idata P N Purpose Function of Item A B C D PAII 2 Board 55039902 Power Supply Board Yes Ye s No No SUII 2 Board 55047402 Power Supply Board Yes Ye s Ye s No N A N A Power supply function included on t...

Page 15: ...t XFRMR 56413202 Transformer Microline 321 with SSD No No No Ye s Interconnect Module Item Okidata P N Purpose Function of Item A B C D Interco nnect Module 55328301 Connects power supply board to mai...

Page 16: ...o Ye s Chassis Item Okidata P N Purpose Function of Item A B C D Chassis 50061101 Middle Cover Microline 320 Yes Ye s Ye s No Chassis 50061201 Middle Cover Microline 321 Yes Ye s Ye s No Chassis 50104...

Page 17: ...tter Quality NLQ 1 2 03 Character Pitches 10 CPI 12 CPI 17 1 CPI 20 CPI Proportional not available in High Speed Draft mode 1 2 04 Character Sets Standard Microline Version Standard ASCII IBM Line Gra...

Page 18: ...ity 10 250 120 25 0 12 250 144 20 8 17 1 250 206 14 6 20 250 240 12 5 LQ 2 Pass Print 10 62 5 240 6 25 12 62 5 288 5 20 17 1 62 5 412 3 64 20 62 5 480 3 12 1 2 06 Print Resolution NOTE Super Speed Dra...

Page 19: ...econd Continuous Feed Paper 1 2 09 Interface Specifications Centronics Parallel Standard RS232C Serial Optional NOTE Interface cables are sold separately A shielded cable is required Twisted pair wire...

Page 20: ...Carbon Lined or Pressure Sensitive Weight Minimum 9 pound 35 g m2 Maximum 11 pound 40 g m2 Thickness Maximum 0 014 inches 0 356 mm Number of Copies Original plus four copies 1 3 04 Multipart Interlea...

Page 21: ...tom feed Set the head gap at Position 2 for 100 pound card stock Weight Maximum 100 pound 150 g m2 Thickness Maximum 0 008 inches 0 20 mm Dimensions Maximum 5 inches x 8 inches 1 3 09 Labels NOTES Lab...

Page 22: ...paper separator Product Height Width Depth 320 4 6 15 7 13 6 321 4 6 21 7 13 6 1 4 02 Weight Microline 320 Revs A B and C 16 pounds Rev D 17 2 pounds 7 8 kg Microline 321 Revs A B and C 20 pounds Rev...

Page 23: ...Voltage 120 VAC 5 5 15 or 220 240 VAC 10 15 Frequency 50 60 Hz 2 1 5 02 Power Consumption Revs A B and C Operating 315 VA Idle 80 VA Rev D Operating 70 VA Idle 25 VA Copyright 1997 Okidata Division o...

Page 24: ...renheit 10 to 43 degrees Celsius Storage 40 through 158 degrees Fahrenheit 40 to 70 degrees Celsius 1 6 02 Relative Humidity Operating 20 to 90 Non Operating 5 to 95 Storage 5 to 95 1 6 03 Acoustic Sp...

Page 25: ...ndard No 478 CSA Standard C22 2 No 220 FCC Part 15 Subject J Class B Revs A B and C VDE 0806 VDC 0875 Class B BS5850 Rev D VDE 0806 VFG 0243 Class B BS7002 Copyright 1997 Okidata Division of OKI Ameri...

Page 26: ...ractor with Acoustic Cover Cut Sheet Feeder with Access Cover CSF 3000A Super Speed RS232 C Serial Interface Board Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDAT...

Page 27: ...9 CONSUMABLES 1 9 01 Cartridge Ribbon Black 3 million character ribbon life Re inking cartridge Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner...

Page 28: ...Working RAM 15 3 Kbytes 1 10 03 Print Buffer 3 5 Kbytes 1 10 04 Image Buffer 13 2 Kbytes 1 10 05 Receive Buffer Epson Mode 28 Kbytes IBM Mode 16 Kbytes Copyright 1997 Okidata Division of OKI America...

Page 29: ...nutes major sub assembly level 1 11 03 Printer Life 12 000 hrs 25 duty cycle 35 page density 1 11 04 Ribbon Life 3 million characters 1 11 05 Printhead Life 200 million characters in 10 cpi utility pr...

Page 30: ...Rev A units are original production units An interconnect module connects the power supply board to the main control board B Rev B units are retrofitted to include a modified interconnect module which...

Page 31: ...fferences exist between levels To identify the revision level of a printer record the serial number from the back of the printer Refer to the following to decode the serial number Example Printer Seri...

Page 32: ...CUIT BOARD DESCRIPTION Operator Panel Board Power Supply Control Board Large Scale Intergrated Circuitry Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business...

Page 33: ...hich allow the end user to control and monitor the printer s operation For specific information on the capabilities and use of the operator panel please refer to Chapter 4 in the Printer Handbook Copy...

Page 34: ...is fuse opens the transformer MUST be replaced Filter Board The power switch line fuse and line filter are mounted on the filter board Power Supply Board This board transforms AC voltages into 5 vdc 8...

Page 35: ...m and resident character fonts are stored in the Program ROM The microprocessor operates under the control of this program For the Rev A B and C printers the Program ROM is Q13 128 kilobytes For the R...

Page 36: ...The input port is used to read information on the printer s condition Address Latch It latches the low order eight bits of the address bus A0 to A7 These bits are used as addresses for read write oper...

Page 37: ......

Page 38: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 39: ...tialization 2 3 02 Interface Control 2 3 03 Print Head Drive Circuit 2 3 04 Spacing Operation 2 3 05 Line Feed 2 3 06 Alarm Circuit Copyright 1997 Okidata Division of OKI America Inc All rights reserv...

Page 40: ...as follows In Rev A B and C printers Q7 and Q11 are reset In Rev D printers Q1 and Q3 are reset In Rev A B and C printers the operating modes of Q7 and Q11 are set In Rev D printers the operating mode...

Page 41: ...interface LSI latches this input data in synchronization with the STB N signal The BUSY signal is active while this data is being processed When processing is complete the BUSY signal is turned OFF a...

Page 42: ...h of HD ON determines the pin drive time The pin drive time increases as the number of pins to be driven increases The pins are driven in synchronization with the signal IPT which is derived from the...

Page 43: ...ON OFF is used at acceleration deceleration when a large amount torque is required Spacing Motor Encoder Disk Photosensor As the spacing motor is driven the signals PHASE A and PHASE B are generated b...

Page 44: ...iven by the phase signals LF03 and LF04 in synchronization with the signal LFOVD When it is not being driven the line feed motor is held in place by the LF HOLD signal Copyright 1997 Okidata Division...

Page 45: ...unit is printing When printhead temperature reaches 110 degrees Celsius the HEAD OVERHEAT alarm is generated Printing stops when this alarm is detected This allows the printhead temperature to fall W...

Page 46: ...Page 30 Service Guide ML320 ML321 Chapter 2 Principles of Operation 2 4 MECHANICAL PRINCIPLES OF OPERATION...

Page 47: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 48: ...00 million characters The printhead is designed with nine pins vertically aligned Each pin is welded to an armature ring Behind the armature ring is a spacer ring Each armature has a permanent magnet...

Page 49: ...or monitors the printhead temperature If the temperature exceeds the 110 degrees Celsius the thermistor causes a signal to be generated on the main controller board The printer stops printing A BUSY s...

Page 50: ...tor assembly consists of the following items DC Motor Gear Carriage Frame Carriage Shaft Space Rack Encoder Disk Sensor Encoder Disk Guide Rail Spacing Operation The printhead and spacing motor are mo...

Page 51: ...sensor The position of the carriage frame is obtained by counting the pulses generated by the encoder disk sensor as the disk turns Copyright 1997 Okidata Division of OKI America Inc All rights reser...

Page 52: ...ight of the guide rail The height of the guide rail helps determine the distance between the printhead and platen when measured at the right end of the platen Turning the adjusting cam to the RIGHT wi...

Page 53: ......

Page 54: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 55: ...he ribbon drive mechanism drives the ribbon in sync with the spacing operation The mechanism is driven by the spacing motor The ribbon drive mechanism consists of the following items Ribbon Drive Gear...

Page 56: ...ting the ribbon gear rotational direction reverses each time the direction of the carriage movement reverses In this case the gears in the ribbon drive gear assembly move the position of an intermedia...

Page 57: ...of the printer It drives the platen via the reduction gear If the optional tractor unit is installed platen rotation is transmitted through the idle gear to the tractor unit The paper feed mechanism...

Page 58: ...he tractor feed position the release lever allows the reset spring to push the change gear toward the tractor gear At the same time the release lever pushes the pressure rollers away from the platen w...

Page 59: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 60: ...d lever from falling into the slot in the bottom paper guide This causes the rear part of the paper end lever to activate the paper end sensor When the printer runs out of paper the tip of the bottom...

Page 61: ...printhead position Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 62: ...two inches of paper SASF motion stops after two inches of paper feed motion and paper end is detected SASF should be used for loading tractor feed paper Okidata recommends using SASF instead of press...

Page 63: ...bly This chapter consists of the following sections Disassembly Assembly Procedures Adjustments Cleaning Lubrication Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKID...

Page 64: ...ty is to be achieved 3 1 02 Maintenance Tools The following tools are required to service the unit 2 Phillips Screwdriver with magnetic tip Straight slot Screwdriver Needle Nose Pliers 4 Inch Rubber B...

Page 65: ...ial Number Identification A D Revision Levels A Rev A units are original production units An interconnect module connects the power supply board to the main control board B Rev B units are retrofitted...

Page 66: ...r Serial Number 401D0154693 Date Code 401 4 year 01 month Revision D Serial Number 0154693 Item Okidata P N Purpose Function of Item A B C D LXMC Board 55041411 Main Control Board Yes Ye s No No LXMC...

Page 67: ...t XFRMR 56407502 Transformer Microline 321 Yes Ye s Ye s No 120 Volt XFRMR 56413201 Transformer Microline 320 with SSD No No No Ye s 120 Volt XFRMR 56413202 Transformer Microline 321 with SSD No No No...

Page 68: ...over 53070801 Middle Cover Microline 321 with SSD No No No Ye s Chassis Item Okidata P N Purpose Function of Item A B C D Chassis 50061101 Middle Cover Microline 320 Yes Ye s Ye s No Chassis 50061201...

Page 69: ...art number is not available Part Item Product Comment Revision App B Number Description Reference This Service Handbook lists the disassembly procedures for major components of the unit Okidata does N...

Page 70: ...e paper if installed 3 Detach the AC power cord 2 4 Detach the interface cable 3 if installed Part Number Item Description Product Commen t Revision App B Reference P N 56609701 Cord AC 120 V Both RSP...

Page 71: ...P N 70000803 Kit Parallel Interface Plug n Play Accessory Both Option A B C D N A Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX f...

Page 72: ...towards the center of the printer before removing the separator assembly Perform these procedures first 3 2 01 Open the access cover 1 Move the paper bail lever 2 toward the front of the printer While...

Page 73: ...ator Assembly Narrow 320 RSPL A B C D B 2 06 08 10 P N 50069901 Separator Assembly Wide 321 RSPL A B C D B 2 06 08 10 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKI...

Page 74: ...Allow the printhead to cool before handling Perform these procedures first 3 2 01 Open the access cover 1 Remove the ribbon cartridge 2 Move the printhead mounting clamp 3 in the direction of arrow A...

Page 75: ...63802 Printhead Assembly Both RSPL A B C D B 2 03 04 05 P N 52102001 Ribbon Both Consumable A B C D B 2 16 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Busine...

Page 76: ...and avoids damage when the cover is removed Notshown Detach the platen knob 1 Insert a flat blade screwdriver through the slots 2 and disengage the claws of the cover The Microline 320 has three slots...

Page 77: ...CAUTION Do NOT rotate the access cover past the vertical when removing it The tab extensions can break The Rev D middle cover is NOT compatible with the Rev A B and C middle cover...

Page 78: ...pp B Reference P N 51901101 Knob Platen Both RSPL A B C D B 2 03 04 05 P N 50060701 Cover Access Assembly 320 RSPL A B C D B 2 01 02 P N 50060801 Cover Access Assembly 321 RSPL A B C D B 2 01 02 P N 5...

Page 79: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 80: ...mpatible with the Rev A B and C operator panel assembly and board Perform these procedures first 3 2 01 3 2 04 Release the claws 1 and remove the operator panel assembly 2 from the chassis 3 As the op...

Page 81: ...Part Number Item Description Product Comment Revision App B Reference P N 50069603 Panel Operation w Frame Both RSPL A B C B 2 12 Assembly...

Page 82: ...oth RSPL A B C B 2 12 Operator PCB P N 55075011 PCB LXON Assembly Both RSPL D B 2 12 SSD Op Panel PCB Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Pa...

Page 83: ...acts can eliminate a false diagnosis of a failed control board or power supply board Check the contacts and connections of the control board If good contact is not made at all connections and ground p...

Page 84: ...tacts are made at these points Guides A and B Power Interconnect Module C Linefeed Motor Interconnect Module D Sensor Lever E Printhead Cable Connector F The sensor lever must be positioned in the pap...

Page 85: ...nce P N 50704301 Clamp PCB Both RSPL A B C D B 2 03 04 05 P N 55041412 PCB LXMC 3 w o ROM Both RSPL A B C B 2 03 04 Control Board P N 50605501 Lock Board Screw LXMC Both RSPL A B C D B 2 03 04 05 Copy...

Page 86: ...od contact is not made at all connections and ground points false diagnosis will occur Perform these procedures first 3 2 01 3 2 04 3 2 05 Turn the locking post 1 90 degrees clockwise to unlock it Lif...

Page 87: ...NOTE When installing verify that correct contacts are made at these points Guides A and B Linefeed Motor Interconnect Module C Sensor Lever D...

Page 88: ...mber Item Description Product Comment Revision App B Reference P N 50704301 Clamp PCB Both RSPL A B C D B Control Board 2 03 04 05 P N 55041412 PCB LXMC 3 w o ROM Both RSPL A B C B 2 03 04 P N 5060550...

Page 89: ...od contact is not made at all connections and ground points false diagnosis will occur Perform these procedures first 3 2 01 3 2 04 3 2 05 Turn the locking post 1 90 degrees clockwise to unlock it Lif...

Page 90: ...sensor lever must be positioned in the paper end sensor If the lever is not correctly positioned the ALARM lamp will light and the unit will not automatically load paper or receive data Part Number It...

Page 91: ...sembly SSD w o ROMs Control Board Both RSPL D B 2 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this materi...

Page 92: ...his part Perform these procedures first 3 2 01 3 2 04 Insert a flat blade screwdriver at the bottom of the chassis 1 and push up on the two claws 2 of the IC card A panel 3 to release the panel Pull t...

Page 93: ...Panel IC Card A Both RSPL A B C B 2 06 08 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx...

Page 94: ...transformer This unit has been replaced by the Rev C unit shown on the following pages Perform these procedures first 3 2 01 3 2 04 Disconnect the cable 1 from the filter assembly Disconnect the cabl...

Page 95: ...sformer 120 V 321 RSPL A B C B 2 03 04 P N 56407901 Transformer 220 240 V 320 Option RSPL A B C B 2 03 04 P N 56407902 Transformer 220 240 V 321 Option RSPL A B C B 2 03 04 Copyright 1997 Okidata Divi...

Page 96: ...ansformer Perform these procedures first 3 2 01 3 2 04 Disconnect the cable 1 from the filter assembly Disconnect the cable 2 from the power supply board Remove the screw 3 and detach the grounding wi...

Page 97: ...sformer 120 V 321 RSPL A B C B 2 03 04 P N 56407901 Transformer 220 240 V 320 Option RSPL A B C B 2 03 04 P N 56407902 Transformer 220 240 V 321 Option RSPL A B C B 2 03 04 Copyright 1997 Okidata Divi...

Page 98: ...ansformer Perform these procedures first 3 2 01 3 2 04 Disconnect the cable 1 from the filter assembly Disconnect the cable 2 from the power supply board Remove the screw 3 and detach the grounding wi...

Page 99: ...Transformer 120 V SSD 321 RSPL D B 2 05 P N 56413301 Transformer 230 240V SSD 320 Option RSPL D B 2 05 P N 56413302 Transformer 230 240V SSD 321 Option RSPL D B 2 05 Copyright 1997 Okidata Division of...

Page 100: ...e chassis push on and release the claw 1 of the filter assembly 2 Lift the AC connector 3 and the AC power switch 4 from the two guides on the main frame Remove the filter assembly The filter assembly...

Page 101: ...AC 220 240V P N 56303402 Fuse 1 5 amp 250 V Both Option A B C D B 2 03 04 05 Filter Board Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Excha...

Page 102: ...cuitry to provide the power supply function Refer to Appendix A for more information on this board Perform these procedures first 3 2 01 3 2 04 Push the board clamp claw 1 in the direction of arrow A...

Page 103: ...250V Both Option A B C B 2 03 04 PAII or SUII Board P N 56302502 Fuse 250V 1A Both Option A B C B 2 03 04 P N 56616802 Cable Power Supply Both RSPL C B 2 04 Nylon Conn Copyright 1997 Okidata Division...

Page 104: ...rd contains circuitry to provide the power supply function Refer to Appendix A for more information on this board Perform these procedures first 3 2 01 3 2 04 Push the board clamp claw 1 in the direct...

Page 105: ...250V PAII or SUII Board Both Option A B C B 2 03 04 P N 56302502 Fuse 250V 1A Both Option A B C B 2 03 04 P N 56616802 Cable Power Supply Nylon Conn Both RSPL C B 2 04 Copyright 1997 Okidata Division...

Page 106: ...S The Rev A and B printers do NOT have a cable guide The Rev C and Rev D printers do NOT have a power interconnect module Rev C and Rev D printers have a cable guide Perform these procedures first 3 2...

Page 107: ...eference P N 53328301 Module Power Interconnect Module Power Inter connect Both A B B 2 06 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Excha...

Page 108: ...ve a cable guide The Rev C and Rev D printers do NOT have a power interconnect module Rev C and Rev D printers have a cable guide Perform these procedures first 3 2 01 3 2 04 Use a straight slot screw...

Page 109: ...801 Guide Cable 320 RSPL C D B 2 08 10 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx ok...

Page 110: ...ave a cable guide The Rev C and Rev D printers do NOT have a power interconnect module Rev C and Rev D printers have a cable guide Perform these procedures first 3 2 01 3 2 04 Use a straight slot scre...

Page 111: ...801 Guide Cable 320 RSPL C D B 2 08 10 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx ok...

Page 112: ...m spring 1 Release the claw 2 and detach the left bail arm 3 from the bail bar 4 Pull the left bail arm through the guide hole 5 in the chassis and remove the arm Detach the bail bar from the right ba...

Page 113: ...Spring Bail Arm L Both RSPL A B C D B 2 06 08 10 P N 53489301 Bail Arm L Both RSPL A B C D B 2 06 08 10 P N 50911701 Spring Bail Arm R Both RSPL A B C D B 2 06 08 10 P N 53489201 Bail Arm R Both RSPL...

Page 114: ...icator Assembly 321 RSPL A B C D B 2 06 08 10 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http...

Page 115: ...over to provide access when connecting the head cable to the control board Perform these procedures first 3 2 01 3 2 04 3 2 06 Slide the carriage frame 1 in the direction of arrow A Release the two cl...

Page 116: ...r Head Cable Access Both RSPL A B C B 2 06 08 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http...

Page 117: ...or you may damage it Perform these procedures first 3 2 01 3 2 04 Remove the ribbon 1 Insert a straight slot screwdriver through the access slots and release the two front claws 2 and the two rear cla...

Page 118: ...oth RSPL A B C D B 2 13 P N 56616301 Cable Head Flexible 320 RSPL A B C D B 2 13 P N 56616302 Cable Head Flexible 321 RSPL A B C D B 2 13 P N 51706501 Rubber Contact Pressure Both RSPL A B C D B 2 13...

Page 119: ...ocedures first 3 2 01 3 2 03 3 2 04 3 2 14 Note the position of the connector 1 During assembly the connector s orientation is critical for correct printhead operation Detach the connector Remove the...

Page 120: ...3 of this Service Handbook Cleaning When cleaning refer to Section 3 4 of this Service Handbook Lubrication When lubricating refer to Section 3 5 of this Service Handbook Part Number Item Description...

Page 121: ...clamp 1 Use a flat blade screwdriver to release the tabs of the ribbon protector 2 Remove the ribbon protector Push the carriage shaft clamp 3 in the direction of arrow A Lift the carriage shaft 4 at...

Page 122: ...on 3 3 of this Service Handbook Cleaning When cleaning refer to Section 3 4 of this Service Handbook Lubrication When lubricating refer to Section 3 5 of this Service Handbook Part Number Item Descrip...

Page 123: ...D B 2 13 P N 53490401 Frame Carriage Assembly Both RSPL A B C D B 2 13 P N 53056201 Protector Ribbon Both RSPL A B C D B 2 13 Copyright 1997 Okidata Division of OKI America Inc All rights reserved Se...

Page 124: ...ntenance Disassembly 3 2 17 Space Rack Perform these procedures first 3 2 01 3 2 04 3 2 14 3 2 15 Remove the tension spring 1 Release the claw 2 from the hole 3 in the chassis Pull the space rack 4 in...

Page 125: ...uide pins 5 Cleaning When cleaning refer to Section 3 4 of this Service Handbook CAUTION Do NOT lubricate the space rack Lubricating the space rack will attract dust If enough dust accumulates on the...

Page 126: ...A B C D B 2 06 08 10 P N 53489402 Rack Space 321 RSPL A B C D B 2 06 08 10 P N 50911901 Spring Tension Both RSPL A B C D B 2 06 08 10 Copyright 1997 Okidata Division of OKI America Inc All rights rese...

Page 127: ...e adjusting cam 1 out and rotate it to the horizontal position Release the adjusting cam from the guide 2 in the chassis and remove the cam Push the claw 3 in the direction of arrow A to disengage the...

Page 128: ...r to Section 3 3 of this Service Handbook Part Number Item Description Product Commen t Revision App B Reference P N 51002101 Rail Guide 320 RSPL A B C D B 2 06 08 10 P N 51002102 Rail Guide 321 RSPL...

Page 129: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 130: ...elease lever 1 to the rear of the printer Pull the platen lock levers 2 in the direction of arrow A Rotate the lock levers in the direction of arrow B This releases the platen assembly 3 from the chas...

Page 131: ...efer to Section 3 4 of this Service Handbook Lubrication When lubricating refer to Section 3 5 of this Service Handbook Do NOT lubricate the line feed motor gear Lubricant will cause the gear to disin...

Page 132: ...d without removing the line feed motor assembly However the platen assembly MUST be removed The line feed idle gear should be removed ONLY if it must be replaced The claws will break when the gear is...

Page 133: ...will not seat if the tabs are bent If the assembly is not seated correctly the gears will not correctly align Rotate the bias gear towards the front of the printer as far as the gear will turn This al...

Page 134: ...ion App B Reference P N 56507003 Motor Line Feed Both RSPL A B C D B 2 07 09 11 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for...

Page 135: ...gear must be installed Perform these procedures first 3 2 01 3 2 02 3 2 04 3 2 05 3 2 06 3 2 19 Remove the left bail arm Use a small cutting pliers to cut the three claws 1 that secure the line feed...

Page 136: ...installation and alignment will cause line feed motor gear breakage and wearing Do NOT apply lubricant to the teeth of the line feed motor gear Grease causes the plastic to break down resulting in pr...

Page 137: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 138: ...lastic extension will break if too much pressure is applied Perform these procedures first 3 2 01 3 2 02 3 2 04 3 2 05 3 2 06 3 2 20 Insert a straight slot screwdriver between the line feed motor inte...

Page 139: ...Motor Interconnect Both RSPL A B C D B 2 07 09 11 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material...

Page 140: ...s procedure Firm pressure will release the reset spring NOT brute force Perform these procedures first 3 2 01 3 2 02 3 2 04 Use a flat blade screwdriver to press down at position A of the reset spring...

Page 141: ...the Change Gear and the Idler Gear Both RSPL A B C D B 2 07 09 11 P N 51215901 Change Gear Included in the Idler Change Gear Kit Both A B C D B 2 07 09 11 P N 51216001 Idler Gear Included in the Idler...

Page 142: ...the chassis Pull the release lever 3 in the direction of arrow A and remove the lever Part Number Item Description Product Commen t Revision App B Reference P N 53489501 Lever Release Both RSPL A B C...

Page 143: ...3 2 01 3 2 02 Use a straight slot screwdriver to detach the coupling holes 1 of the support spring 2 from the projections 3 on the main chassis Microline 321 ONLY Work from left to right and use a st...

Page 144: ...e plates 7 at the same time The Microline 320 has five coupling holes and ten guide plates The Microline 321 has seven coupling holes and thirteen guide plates Part Number Item Description Product Com...

Page 145: ...C D B 2 07 09 11 P N 50913901 Spring Support 321 RSPL A B C D B 2 07 09 11 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any...

Page 146: ...in View A so the spine 3 is aligned with the slot 4 in the guide hole Slide the release link off the pressure roller assembly 5 Remove the pressure roller assembly by sliding it through the guide hol...

Page 147: ...ference P N 50061801 Chute Paper Assembly 320 RSPL A B C D B 2 07 09 11 P N 50061901 Chute Paper Assembly 321 RSPL A B C D B 2 07 09 11 P N 50061601 Roller Pressure Assembly 320 RSPL A B C D B 2 07 09...

Page 148: ...in the lower tractor feed shaft 4 The lower tractor feed shaft is square Remove the tractor gear Lift the lower tractor feed shaft above the guide 5 Slide the lower tractor feed shaft in the directio...

Page 149: ...same direction The left tractor assembly must be positioned to the left line feed motor side of the plastic tab and ground plate This limits movement and correctly positions the paper against the pap...

Page 150: ...2 14 P N 51109502 Shaft Drive 321 RSPL A B C D B 2 14 P N 51111201 Shaft Lock 320 RSPL A B C D B 2 14 P N 51109602 Shaft Lock 321 RSPL A B C D B 2 14 P N 51004901 Sheet Guide Both RSPL A B C D B 2 14...

Page 151: ...ever Perform these procedures first 3 2 01 3 2 02 3 2 04 3 2 05 3 2 06 3 2 20 3 2 22 3 2 25 3 2 26 Turn the sensor lever 1 clockwise until it is horizontal Lift the sensor lever from the shaft bearing...

Page 152: ...ision App B Reference P N 53489001 Lever Sensor Both RSPL A B C D B 2 07 09 11 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for...

Page 153: ...ever guide is accessed from the bottom of the printer Perform these procedures first 3 2 01 3 2 02 3 2 04 3 2 05 3 2 06 3 2 20 3 2 22 3 2 25 3 2 26 3 2 27 While pushing on the six claws 1 detach the s...

Page 154: ...ion Product Commen t Revision App B Reference P N 53488901 Lever Paper End B 320 RSPL A B C D B 2 07 09 11 P N 53488902 Lever Paper End B 321 RSPL A B C D B 2 07 09 11 P N 53489101 Cover Sensor Both R...

Page 155: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 156: ...evision App B Reference P N 50061101 Chassis Main Assembly 320 RSPL A B C B 2 07 09 P N 50061201 Chassis Main Assembly 321 RSPL A B C B 2 07 09 P N 50104501 Chassis Main Assembly SSD 320 RSPL D B 2 11...

Page 157: ...e required when replacing either consumables or parts The disassembly assembly procedures list the required adjustment and refer you to this section Failure to perform these procedures may result in u...

Page 158: ...ses Phase 1 Setup Phase Steps 1 6 The cover is removed and the printhead is placed at a known reference point Phase 2 Printhead Gap Modification Phase Steps 7 9 The distance between the printhead and...

Page 159: ...ncrease the gap Turn the adjusting screw COUNTER CLOCKWISE to decrease the gap The printhead gap must measure Rev A B and C 0 016 inch 0 002 inch Rev D 0 018 inch 0 002 inch 10 Slide the carriage asse...

Page 160: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 161: ...build up quickly Keeping the covers in place and performing the cleaning procedures correctly will help ensure the highest quality printer output 3 4 02 Cleaning Schedule Routine inspection and clean...

Page 162: ...per particles Wipe or vacuum all dirt dust etc Space Rack 3 2 17 Vacuum Cloth Remove any paper particles Wipe or vacuum all dirt dust etc Paper End Sensor 3 2 28 Vacuum Cloth Wipe or vacuum any accumu...

Page 163: ...is replaced 3 5 03 Lubrication Types Grease Dow Corning BR2 or equivalent Machine Oil 10 30 weight 3 5 04 Lubrication Amounts Do NOT over lubricate the printer Operational problems are caused by exce...

Page 164: ...n Assembly Contact point between the bias gear and the platen gear 3 2 19 Machine Oil Small Idle Gear Bearing 3 2 22 Grease Medium Change Lever Bearing and pivot point 3 2 22 Grease Medium Pressure Sp...

Page 165: ...otor Board Electrical Contacts and Connections Space Rack Carriage Drive Belt Head Cable Microswitches Pressure Rollers on Bail Bar Copyright 1997 Okidata Division of OKI America Inc All rights reserv...

Page 166: ...his kit please report the problem to Okidata Send your report to the Okidata Technical Training Group Refer to the Service Center Reference Guide for information on contacting Okidata The following in...

Page 167: ...correct parts orders Printer Serial Number Identification There are four serial number revision levels for the Microline 320 and 321 printers Hardware differences exist between levels To identify the...

Page 168: ...r Panel Bezel with SSD No No No Ye s Transformer Item Okidata P N Purpose Function of Item A B C D 120 Volt XFRMR 56407503 Transformer Microline 320 Yes Ye s Ye s No 120 Volt XFRMR 56407502 Transforme...

Page 169: ...icroline 320 Yes Ye s Ye s No Cover 53488402 Middle Cover Microline 321 Yes Ye s Ye s No Cover 53070701 Middle Cover Microline 320 with SSD No No No Ye s Cover 53070801 Middle Cover Microline 321 with...

Page 170: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 171: ...interconnect module the control board and the power supply board Rev A and B units ONLY Clean the contacts if dirty If contacts are bent or broken replace the module Proper inspection and cleaning of...

Page 172: ...the printer If the paper does jam power OFF the printer Carefully back the paper out of the paper path by using the platen knob Remove any shreds of paper from the paper path The printer suddenly chan...

Page 173: ...s a system manager may be using this feature to maintain proper print settings To activate these switches power OFF the printer Press and hold the MODE switch while powering ON the printer Follow the...

Page 174: ...printer is ready to receive data and to print OFF ON N A Normal Operation Hex Dump The printer is in Hex Dump Mode Refer to Section 4 7 OFF OFF N A Normal Operation Off Line The printer will NOT recei...

Page 175: ...ge the menu settings ON OFF N A Operator Alarm Paper End Printer is out of paper ON OFF N A Operator Alarm Paper Jam SASF paper jam ON OFF N A Operator Alarm CSF Paper Jam Paper jam or paper end with...

Page 176: ...he control board Blinking ON Program ROM Error Replace the ROM R R eplace the control board Blinking ON External RAM Error Replace the control board Blinking ON Spacing Error Go to RAP 02 Blinking ON...

Page 177: ...trol board If good contact is not made at all connections and ground points false diagnosis will occur Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business P...

Page 178: ...sociated with the printer s problem Go to the appropriate RAP All of the RAPs will begin with a START Statement followed by questions or another type of statement If the RAPs do not lead you to the ca...

Page 179: ...Abnormal Spacing Rev A B and C 02 B Abnormal Spacing Rev D 03 Wrong or Missing Characters Dots on Output 04 Line Feed Problems 05 Malfunction of Operator Panel Switch es 06 Parallel Interface Does Not...

Page 180: ...en replace the module Proper inspection and cleaning of the power interconnect module contacts can eliminate a false diagnosis of a failed control board or power supply board Control Board Check the c...

Page 181: ...oblem resolved YES End of procedure NO Go to B NO Go to B B Verify that the fuse holder is making proper contact with the fuse Remove the fuse from the holder Gently squeeze both sides of the holder s...

Page 182: ...e the contacts Is the problem resolved YES End of procedure NO Go to E YES Go to E E Replace the connector between the power supply board and the control board Is the problem resolved YES End of proce...

Page 183: ...use Is the problem resolved YES End of procedure NO Go to B NO Go to B B Verify that the fuse holder is making proper contact with the fuse Remove the fuse from the holder Gently squeeze both sides of...

Page 184: ...ower cable correctly connected to CN4 of the control board NO Correctly connect the cable Is the problem resolved YES End of procedure NO Go to the next step listed below YES Replace the transformer I...

Page 185: ...l board Is the problem resolved YES End of procedure NO Go to the next step listed below NO Clean the contacts between the carriage cable and the space motor contacts Is the problem resolved YES End o...

Page 186: ...procedure NO Go to the next step listed below NO Reseat the power supply board the control board and the connection between the two boards Is the problem resolved YES End of procedure NO Go to E E Is...

Page 187: ...procedure NO Contact Technical Support Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx o...

Page 188: ...place the control board Is the problem resolved YES End of procedure NO Go to the next step listed below NO Clean the contacts between the carriage cable and the space motor contacts Is the problem re...

Page 189: ...NO Go to D NO Correctly connect the cable Is the problem resolved YES End of procedure NO Go to D D Is the carriage cable properly inserted into CN2 of the control board NO Properly insert the cable...

Page 190: ...Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 191: ...listed below YES Replace the printhead Is the problem resolved YES End of procedure NO Replace the control board Is the problem resolved YES End of procedure NO Go to A A Are the contacts between the...

Page 192: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 193: ...to A YES Check the following in the order given below Check the operation of the platen knob before moving between steps 1 Check the paper feed path setting 2 Clean the platen gear idle gear and driv...

Page 194: ...ort NO Replace the line feed motor Is the problem resolved YES End of procedure NO Contact Technical Support NO Correct the contact Is the problem resolved YES End of procedure NO Contact Technical Su...

Page 195: ...of procedure NO Replace the control board Is the problem resolved YES End of procedure NO Contact Technical Support NO Correctly make the connection Is the problem resolved YES End of procedure NO Re...

Page 196: ...e cable Is it correctly connected YES Replace the cable with a cable known to work Is the problem resolved YES End of procedure NO Replace the control board Is the problem resolved YES End of procedur...

Page 197: ...onnect the cable Is the problem resolved YES End of procedure NO Go to the next step listed below YES Replace the serial interface cable with a cable proven to work Is the problem resolved YES Replace...

Page 198: ...d YES End of procedure NO Contact Technical Support Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this materia...

Page 199: ...r OFF the printer 2 Press and hold SEL and FORM FEED while powering ON the printer 3 The printer will remain in hexadecimal dump mode until it is powered OFF 4 7 03 Sample Here is a line of BASIC code...

Page 200: ...ection Interconnect Diagram Rev A and B Rev C Rev D Printhead Rev A B C and D Space Motor Rev A B C and D Line Feed Motor Rev A B C and D Operator Panel Board Rev A B and C Rev D Control Board Rev A B...

Page 201: ...pter 4 Failure Repair Analysis 4 8 02 Interconnect Diagrams Rev A B Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates...

Page 202: ...Chapter 4 Failure Repair Analysis Interconnect Diagrams Rev C Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to t...

Page 203: ...Chapter 4 Failure Repair Analysis Interconnect Diagrams Rev D Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to t...

Page 204: ...ML321 Chapter 4 Failure Repair Analysis 4 8 03 Printhead Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this m...

Page 205: ...ML321 Chapter 4 Failure Repair Analysis 4 8 04 Space Motor Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this...

Page 206: ...321 Chapter 4 Failure Repair Analysis 4 8 05 Line Feed Motor Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to thi...

Page 207: ...ter 4 Failure Repair Analysis 4 8 06 Operator Panel Board Rev A B C Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates...

Page 208: ...1 Chapter 4 Failure Repair Analysis Operator Panel Board Rev D Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to t...

Page 209: ...Chapter 4 Failure Repair Analysis 4 8 07 Control Board Rev A D Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to...

Page 210: ...t Serial Interface Loopback Test The Rolling ASCII Print and Font Sample Tests are used to determine if the printer is operating properly The Serial Interface Loopback Test is used to test proper oper...

Page 211: ...el Emulation Country Code and Firmware Revision Level CAUTION If 13 6 inch Paper Width is selected in the menu and you run this test with 8 5 inch wide paper loaded the test will print on the platen T...

Page 212: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 213: ...d Firmware Revision Level CAUTION If 13 6 inch Paper Width is selected in the menu and you run this test with 8 5 inch wide paper loaded the test will print on the platen This may damage the platen ri...

Page 214: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 215: ...cess the desired group Serial Interface Each time you press GROUP the printer will print the current group Press ITEM until you access the desired item Diagnostic Test Press SET until you access the d...

Page 216: ...itch while powering ON the printer The printer will be in Menu Mode Press GROUP until you access the desired group Serial Interface Each time you press GROUP the printer will print the current group P...

Page 217: ...m in the General Control Group is Operator Panel functions The settings for this item are Full Operation and Limited Operation A system manager may use this feature to maintain proper print settings i...

Page 218: ...n item Press MODE to record the changes and return to Print Mode The MENU lamp will go out and the SEL lamp will light 4 10 05 Resetting to Factory Defaults CAUTION Always print the menu before resett...

Page 219: ...on protector shows the baseline of the current printing position Use this when positioning the Top of Form The Top of Form is automatically saved in the printer s static memory Powering OFF the unit w...

Page 220: ...he temporary Top of Form NOTE The bail must hold the paper in place If the top of the page is set below the bail the paper will catch on the bail and a paper jam will occur Copyright 1997 Okidata Divi...

Page 221: ...n on the paper separator Raise the separator to its upright position Set a sheet of paper on the separator and adjust the guides The guides should barely touch the edges of the paper Be sure to positi...

Page 222: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 223: ...ding data to the printer Forms Tear Off may be activated if it is enabled through the Menu The pause must be for two or more seconds No data is lost Uneven print registration will occur due to the pap...

Page 224: ...static memory Powering OFF the unit will NOT change the Top of Form You must reset the Top of Form to change it Release TOF Quiet The paper advances from the initial print position to the tear off pos...

Page 225: ...ied interconnect module which prevents corrosion C Rev C units have a cable harness connection between the power supply board and the main control board The cable harness replaces the interconnect mod...

Page 226: ...1 printers Hardware differences exist between levels To identify the revision level of a printer record the serial number from the back of the printer Refer to the following to decode the serial numbe...

Page 227: ...MC A and B A 2 01 Power Supply PAII 2 A and B A 2 04 Filter Assembly A B C and D A 2 06 Operator Panel LXSP A B and C A 2 07 RS232 C Serial Interface LXHI A B C and D A 2 09 Rev C Description Board De...

Page 228: ...rface LXHI A B C and D A 2 09 Rev D Description Board Designation Rev Section Control Board LXMR D A 2 03 Filter Assembly A B C and D A 2 06 Operator Panel LXSP D A 2 08 RS232 C Serial Interface LXHI...

Page 229: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 230: ...oard Firmware Q13 Program ROM Q8 and Q9 Dynamic RAM require a constant refresh signal Q12 Static RAM backed up by a 3 25 V lithium battery Fuses Rev 1 and 2 F1 Thermal Fuse The fuse is located on Q10...

Page 231: ...c F1 40 vdc R88 5 vdc C12 40 vdc Notes CN1to operator panel CN2to head cable CN3to serial interface CN4 to optional cut sheet feeder CN5to parallel interface CN6to power supply CN7to line feed motor D...

Page 232: ...RAM require a constant refresh signal Q12 Static RAM backed by a 3 25 V lithium battery Fuses F1 Inline Fuse Jumpers SP1 Side A Enable I Prime Side B Disable I Prime SP2 Side A Auto Line Feed always e...

Page 233: ...he board accepted a 28 pin EPROM at the Q13 socket location The newer version of the board accepts a 32 pin masked ROM It will also accept the 28 pin EPROM No jumper changes are necessary If a 28 pin...

Page 234: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 235: ...ts The drive circuits paper end sensor and the interface connector are on this board It also contains the components needed for regulating DC voltage and those needed to convert AC voltage to DC volta...

Page 236: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 237: ...erts and regulates the AC voltage input to DC voltage and supplies the DC voltage to the control board Firmware NONE Fuses F1 2 0 amp 250 VAC Jumpers NONE Sensors NONE Switches NONE Test Points CN2 Pi...

Page 238: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 239: ...s and regulates the AC voltage input to DC voltage and supplies the DC voltage to the control board Firmware NONE Fuses F1 2 0 amp 250 VAC Jumpers NONE Sensors NONE Switches NONE Test Points CN2 Pin 1...

Page 240: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 241: ...It also filters out unwanted line noise Its fuse will open when a fault occurs in the printhead drive circuit the space motor drive circuit or any of their peripheral circuits This prevents component...

Page 242: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 243: ...ers NONE Sensors NONE Switches SW1 SEL SW5 PARK Set SW2 MODE SW6 TOF QUIET Print SW3 LF Group SW7 PRINT QUALITY SW4 FF Item SW8 CHARACTER PITCH Displays D1 SELECT D9 NLQ D2 ALARM D10 10 cpi D3 POWER D...

Page 244: ...Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 245: ...W5 PARK Set SW2 MODE SW6 TOF QUIET Print SW3 LF Group SW7 PRINT QUALITY SW4 FF Item SW8 CHARACTER PITCH D1 SELECT D9 20 cpi D2 POWER D10 HSD D3 ALARM D11 NLQ D4 MENU D12 12 cpi D5 Not used D13 PROP D6...

Page 246: ...ce control program Version 2 None RAM Versions 1 and 28 kilobytes Static Is the Message Buffer Processor Version 1Q3M80C31F Version 2Q3M80C51F Fuses NONE Jumpers Version 1SP1 Side AQ8 has ROM installe...

Page 247: ...are not N A will appear where a part number is not available Please read the Definition of Terms in the following section carefully It is important that you understand the different types of classific...

Page 248: ...e installed by the end user Instructions for installation accompany each option Option RSPL Okidata recommends that this part assembly be on hand for servicing installed options Document A document is...

Page 249: ...al Components Rev D B 2 05 Printer Mechanism Rev A and B 1 of 2 B 2 06 Printer Mechanism Rev A and B 2 of 2 B 2 07 Printer Mechanism Rev C 1 of 2 B 2 08 Printer Mechanism Rev C 2 of 2 B 2 09 Printer M...

Page 250: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 251: ...B Illustrated Parts Listing B 2 01 Covers Rev A B and C Part numbers are subject to change Okidata PN OKI J PN Description Model Comments Disassembly Section Serial Rev Level 1 53488302 1PP4016 6557 P...

Page 252: ...7 P1 Frame Rear Cover 320 RSPL 3 2 04 A B C D 3 53488601 1PP4016 6568 P1 Frame Rear Cover 321 RSPL 3 2 04 A B C D 4 50060901 1PA4016 6569 G1 Separator Sheet Assembly 320 RSPL 3 2 04 A B C D 4 50061001...

Page 253: ...subject to change Okidata PN OKI J PN Description Model Comment s Disassembly Section Serial Rev Level 1 53070701 1PP4128 1005 P1 Cover Middle SSD 320 RSPL 3 2 04 D 1 53070801 1PP4128 1007 P1 Cover M...

Page 254: ...1 Frame Rear Cover 321 RSPL 3 2 04 A B C D 4 50060901 1PA4016 6569 G1 Separator Sheet Assembly 320 RSPL 3 2 04 A B C D 4 50061001 1PA4016 6570 G1 Separator Sheet Assembly 321 RSPL 3 2 04 A B C D Copyr...

Page 255: ...03 Electrical Components Rev A and B Okidata PN OKI J PN Description Model Comment s Disassemb ly Section Serial Rev Level 94 56609701 3YS4011 1315 P1 Cord AC 120 V Both RSPL 3 2 01 A B C D 94 566241...

Page 256: ...PL 3 2 06 A B C 83 50605501 4PP4025 2870 P1 Lock Board Screw LXMC Both RSPL 3 2 06 A B C D 92 56407503 4YB4056 8293 P3 Transformer 120 V 320 RSPL 3 2 08 A B C 92 56407502 4YB4056 8293 P4 Transformer 1...

Page 257: ...PCB SUII 6 220 24V Both Option 3 2 10 A B C 10 0 56302101 540A2065N220 2 Fuse Glass 2 amp 250V PAII or SUII Board Both Option 3 2 10 A B C 10 0 56302502 FP 21093 1 Fuse 250V 1A Both Option 3 2 10 A B...

Page 258: ...lustrated Parts Listing B 2 04 Electrical Components Rev C Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disassemb ly Section Serial Rev Level 94 56609701 3YS4011...

Page 259: ...06 A B C D 81 55041412 4YA4021 1051 G106 PCB LXMC 3 w o ROM Control Board Both RSPL 3 2 06 A B C 83 50605501 4PP4025 2870 P1 Lock Board Screw LXMC Both RSPL 3 2 06 A B C D 92 56407503 4YB4056 8293 P3...

Page 260: ...6 PCB SUII 6 220 24V Both Option 3 2 10 A B C 96 56616802 4YS4011 4311 P2 Cable Power Supply Nylon Conn Both RSPL 3 2 10 C 10 0 56302101 540A2065N220 2 Fuse Glass 2 amp 250V PAII or SUII Board Both Op...

Page 261: ...lustrated Parts Listing B 2 05 Electrical Components Rev D Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disassemb ly Section Serial Rev Level 94 56609701 3YS4011...

Page 262: ...2 06 A B C D 81 55075111 4YA4042 1530 G11 PCB LXMR Assembly SSD w o ROMs Both RSPL 3 2 06 D 83 50605501 4PP4025 2870 P1 Lock Board Screw LXMC Both RSPL 3 2 06 A B C D 92 53413201 4YB4049 7061 P1 Trans...

Page 263: ...2 09 A B C D 99 56303402 FP 21107 1 Fuse 1 5 amp 250 V Filter Board Both Option 3 2 09 A B C D Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner...

Page 264: ...Parts Listing B 2 06 Printer Mechanism Rev A and B 1 of 2 Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disassemb ly Section Serial Rev Level 1 9 50069801 3PA4025...

Page 265: ...tor Assembly 321 RSPL 3 2 12 A B C D 2 8 53489201 3PP4025 2840 P1 Bail Arm R Both RSPL 3 2 12 A B C D 2 9 53489301 3PP4025 2841 P1 Bail Arm L Both RSPL 3 2 12 A B C D 3 0 50911701 4PB4025 2842 P1 Spri...

Page 266: ...18 A B C D 1 6 51002102 3PP4025 2809 P2 Rail Guide 321 RSPL 3 2 18 A B C D 1 7 51216201 4PP4025 2810 P1 Cam Adjust Both RSPL 3 2 18 A B C D 1 2 50061305 3PA4025 2811 G5 Platen Assembly 320 RSPL 3 2 1...

Page 267: ...Parts Listing B 2 07 Printer Mechanism Rev A and B 2 of 2 Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disassem bly Section Serial Rev Level 32 B 51219001 3PB405...

Page 268: ...6 P1 Change Gear Both 3 2 22 A B C D 40 50912001 4PP4025 2867 P1 Spring Reset Both RSPL 3 2 22 A B C D 37 53489501 3PP4025 2852 P1 Lever Release Both RSPL 3 2 23 A B C D 18 50911501 3PP4025 2819 P1 Gu...

Page 269: ...3 2 27 A B C D 20 53488901 3PP4025 2825 P1 Lever Paper End B 320 RSPL 3 2 28 A B C D 20 53488902 3PP4025 2825 P2 Lever Paper End B 321 RSPL 3 2 28 A B C D 22 53489101 3PP4025 2827 P1 Cover Sensor Bot...

Page 270: ...ed Parts Listing B 2 08 Printer Mechanism Rev C 1 of 2 Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disasse mbly Section Serial Rev Level 1 9 50069801 3PA4025 296...

Page 271: ...Indicator Assembly 321 RSPL 3 2 12 A B C D 2 8 53489201 3PP4025 2840 P1 Bail Arm R Both RSPL 3 2 12 A B C D 2 9 53489301 3PP4025 2841 P1 Bail Arm L Both RSPL 3 2 12 A B C D 3 0 50911701 4PB4025 2842 P...

Page 272: ...18 A B C D 1 6 51002102 3PP4025 2809 P2 Rail Guide 321 RSPL 3 2 18 A B C D 1 7 51216201 4PP4025 2810 P1 Cam Adjust Both RSPL 3 2 18 A B C D 1 2 50061305 3PA4025 2811 G5 Platen Assembly 320 RSPL 3 2 1...

Page 273: ...ted Parts Listing B 2 09 Printer Mechanism Rev C 2 of 2 Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disasse mbly Section Serial Rev Level 3 2 B 51219001 3PB4055...

Page 274: ...P1 Change Gear Both 3 2 22 A B C D 4 0 50912001 4PP4025 2867 P1 Spring Reset Both RSPL 3 2 22 A B C D 3 7 53489501 3PP4025 2852 P1 Lever Release Both RSPL 3 2 23 A B C D 1 8 50911501 3PP4025 2819 P1 G...

Page 275: ...3 2 27 A B C D 2 0 53488901 3PP4025 2825 P1 Lever Paper End B 320 RSPL 3 2 28 A B C D 2 0 53488902 3PP4025 2825 P2 Lever Paper End B 321 RSPL 3 2 28 A B C D 2 2 53489101 3PP4025 2827 P1 Cover Sensor...

Page 276: ...ed Parts Listing B 2 10 Printer Mechanism Rev D 1 of 2 Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disasse mbly Section Serial Rev Level 1 9 50069801 3PA4025 296...

Page 277: ...025 2840 P1 Bail Arm R Both RSPL 3 2 12 A B C D 2 9 53489301 3PP4025 2841 P1 Bail Arm L Both RSPL 3 2 12 A B C D 3 0 50911701 4PB4025 2842 P1 Spring Bail Arm R Both RSPL 3 2 12 A B C D 3 1 50911801 4P...

Page 278: ...18 A B C D 1 7 51216201 4PP4025 2810 P1 Cam Adjust Both RSPL 3 2 18 A B C D 1 2 50061305 3PA4025 2811 G5 Platen Assembly 320 RSPL 3 2 19 A B C D 1 2 50061306 3PA4025 2811 G6 Platen Assembly 321 RSPL...

Page 279: ...ted Parts Listing B 2 11 Printer Mechanism Rev D 2 of 2 Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disasse mbly Section Serial Rev Level 32 B 51219001 3PB4055 2...

Page 280: ...6 P1 Change Gear Both 3 2 22 A B C D 40 50912001 4PP4025 2867 P1 Spring Reset Both RSPL 3 2 22 A B C D 37 53489501 3PP4025 2852 P1 Lever Release Both RSPL 3 2 23 A B C D 18 50911501 3PP4025 2819 P1 Gu...

Page 281: ...7 A B C D 20 53488901 3PP4025 2825 P1 Lever Paper End B 320 RSPL 3 2 28 A B C D 20 53488902 3PP4025 2825 P2 Lever Paper End B 321 RSPL 3 2 28 A B C D 22 53489101 3PP4025 2827 P1 Cover Sensor Both RSPL...

Page 282: ...on Serial Rev Level 70 50069603 3PP4025 3114 G3 Panel Operation w Frame Assembly Both RSPL 3 2 05 A B C 71 53490101 3PP4025 3114 G3 Operation Panel Both 3 2 05 A B C 71 50107426 3PA4025 2821 G26 O p e...

Page 283: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 284: ...Description Model Comment s Disassemb ly Section Serial Rev Level 2 3 50063701 4PA4025 2955 G1 Drive Ribbon Assembly Both RSPL 3 2 14 A B C D 4 8 56616301 2PU4007 1096 P1 Cable Head Flexible 320 RSPL...

Page 285: ...SPL 3 2 15 A B C D 4 6 53490401 4PB4025 2829 G1 Frame Carriage Assembly Both RSPL 3 2 16 A B C D 4 3 50702901 4PP4025 1048 P1 Clamp Head Both RSPL 3 2 16 A B C D 5 0 53056201 3PP4025 2836 P1 Protector...

Page 286: ...subject to change Okidata PN OKI J PN Description Model Comment s Disassembl y Section Serial Rev Level 5 1 50062101 4PA4025 2861 G1 Frame Tractor L Assembly Both RSPL 3 2 26 A B C D 5 2 50062001 4PA...

Page 287: ...2 26 A B C D 5 4 51109602 4PP4025 2865 P2 Shaft Lock 321 RSPL 3 2 26 A B C D 5 5 51004901 3PP4025 2927 P1 Sheet Guide Both RSPL 3 2 26 A B C D Copyright 1997 Okidata Division of OKI America Inc All r...

Page 288: ...and D Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disassem bly Section Serial Rev Level 5 53493201 2PP4016 6865 G1 Cover Acoustic Tractor Option 320 Option RSPL...

Page 289: ...Option N A A B C D 97 70012701 N A CSF 3000A Cut Sheet Feeder Both Option N A A B C D 82 55038901 4YA4021 1050 G1 PCB LXHI RS232 C Both Option RSPL N A A B C D 84 50803801 4PP4025 2887 P1 Clip Interf...

Page 290: ...ject to change Okidata PN OKI J PN Description Model Comment s Disassembly Section Serial Rev Level 9 8 52102001 N A Ribbon Both Consuma ble 3 2 03 A B C D Copyright 1997 Okidata Division of OKI Ameri...

Page 291: ...and D Part numbers are subject to change Okidata PN OKI J PN Description Model Comment s Disassembly Section Serial Rev Level 101 53496401 N A Box ML320 320 RSPL N A D 101 53496501 N A Box ML321 321...

Page 292: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 293: ...A B C 107 59231404 N A Standard Reference Guide Both Document N A A B C 108 58061601 N A Epson IBM Product Update Both Document N A A B C 109 59230904 N A Epson IBM Reference Guide Both Document N A A...

Page 294: ...Manual Both Document N A A B C D 114 N A N A Marketing Literature Both Document N A A B C D 115 N A N A Marketing Literature Order Form Both Document N A A B C D Copyright 1997 Okidata Division of OKI...

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