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OKIDATA Service Training Manual. 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.
Table of Contents Page Service Guide ML320/ML321 0 About This Manual Front Cover Manual Copyright Manual Part Number and Revision 1 Product Specifications 1.1 General Description ..1.1.02 Serial Number Identification & (A-D) Revision Levels ..Compatibility Chart 1.2 Product Specifications 1.3 Paper Specifications 1.4 Physical Specifications...
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Table of Contents Page ..3.1.01 General Information, Tools & Precautions 3.2 Disassembly/Assembly Procedures ..3.2.01 Preliminary Items ..3.2.02 Separator Assembly ..3.2.03 Printhead Assembly ..3.2.04 Upper Cover Assembly ..3.2.05 Operator Panel Assembly ..3.2.06 Control Board (Rev A & B) ..Control Board (Rev C) ..Control Board (Rev D) ..3.2.07 IC Card (A) Panel ..3.2.08 Transformer (Rev A &...
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Table of Contents Page Failure & Repair Analysis Introduction 4.4 Troubleshooting Tips ..4.4.02 Common Problems 4.5 Fault Alarms 4.6 Repair Analysis Procedures - Using The Raps 4.6.02 RAP Index ..4.6.03 Troubleshooting Cautions ..RAP 01A:Operator Panel Lamps Do Not Light - Rev A, B, and C ..RAP 01B: Operator Panel Lamps Do Not Light - Rev D ..RAP 02A: Abnormal Spacing - Rev A, B, and C...
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Table of Contents Page ..A.2.06 Filter Assembly - Rev A, B, C, and D ..A.2.07 Operator Panel (LXSP) - Rev A, B, and C ..A.2.08 Operator Panel (LXON) - Rev D ..A.2.09 RS232-C Serial Interface (LXHI) - Rev A, B, C, and D B Illustrated Parts Listing Illustrated Parts Listing - General Information ..B.1.02 Definitions of Terms...
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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: 3 Service Guide ML320/ML321 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 this material. (http://bpx.okidata.com)
Both printers feature an enhanced operator panel which provides access to the following capabilities. Menu Selection Quiet Mode Printer Tests Paper Park Print Characteristics Standard Printer Controls 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: 5 Service Guide ML320/ML321 Chapter 1 Product Specifications 1.1.02 Serial Number Identification & (A-D) Revision Levels Rev A units are original production units. An interconnect module connects the power supply board to the main control board. Rev B units are retrofitted to include a modified interconnect module, which prevents corrosion.
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Item Okidata Purpose / Function of Item LXMC 55041411 Main Control Board Board LXMC- 55041412 Main Control Board 3 Board LXMR 55075111 Main Control Board (with SSD) Power Supply Board Item Okidata Purpose / Function of Item PAII-2 55039902 Power Supply Board...
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Transformer - Microline 320 (with Volt SSD) XFRMR 56413202 Transformer - Microline 321 (with Volt SSD) XFRMR Interconnect Module Item Okidata Purpose / Function of Item Interco 55328301 Connects power supply board to nnect main board Module Cable Item Okidata...
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Middle Cover - Microline 320 (with SSD) Chassis 50104601 Middle Cover - Microline 321 (with SSD) 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: 6 Service Guide ML320/ML321 Chapter 1 Product Specifications Compatibility Chart Item Okidata Purpose / Function of Item LXMC 55041411 Main Control Board Board LXMC- 55041412 Main Control Board 3 Board LXMR 55075111 Main Control Board (with SSD) Power Supply Board...
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Transformer Item Okidata Purpose / Function of Item 56407503 Transformer - Microline 320 Volt XFRMR 56407502 Transformer - Microline 321 Volt XFRMR 56413201 Transformer - Microline 320 (with Volt SSD) XFRMR 56413202 Transformer - Microline 321 (with Volt SSD) XFRMR...
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Middle Cover - Microline 320 (with SSD) Chassis 50104601 Middle Cover - Microline 321 (with SSD) 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: 7 Service Guide ML320/ML321 Chapter 1 Product Specifications PRODUCT SPECIFICATIONS 1.2.01 Print Method Impact Dot Matrix Number of Print Wires: 9 Print Wire Diameter: .013 inch (.34 mm) 1.2.02 Print Modes Revs A, B, and C High Speed Draft (HSD)
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Print Mode 10 cpi 12 cpi 17.1cpi 20 cpi 360 cps 300 cps 300 cps 300 cps 300 cps Utility 250 cps 250 cps 250 cps 250 cps 62.5 cps 62.5 cps 62.5 cps 62.5 cps Print Speed at Different CPI for the ML 320/321 Mode Horiz.
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A shielded cable is required. Twisted-pair wires are recommended for noise protection. Parallel interface cables should be no more that 16.4 feet (5 m) in length. 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)
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Maximum: 0.004 inches (0.10 mm) Dimensions Maximum: 8.5 inches wide x 11 inches long (216 mm x 260 mm) 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)
Microline 321 Revs A, B, and C: 20 pounds Rev D: 22.2 pounds (10.1 kg) 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)
Revs A, B, and C Operating: 315 VA Idle: 80 VA Rev D Operating: 70 VA Idle: 25 VA 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)
Storage 5% to 95% 1.6.03 Acoustic Specifications Standard Operation 57 dba Quiet Mode 52 dba 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)
VDE 0806, VDC 0875 Class B BS5850 Rev D VDE 0806, VFG 0243 Class B BS7002 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)
Pull Tractor 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 OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Chapter 1 Product Specifications 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 Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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, Inc. All rights reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
200 million characters in 10 cpi utility print quality. 35% page density and 25% duty cycle 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: 17 Service Guide ML320/ML321 Chapter 2 Principles of Operation PRINTER OVERVIEW 2.1.01 General Information This section describes the operation of the printer. It is divided into three parts. 1) Circuit Board Description ( ) The major components of the main controller board are described and functional descriptions of the operator panel board and power supply are provided.
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401 (4 = year. 01 = month) Revision Serial Number 0154693 For more information see the compatibility chart ( 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)
Chapter 2 Principles of Operation CIRCUIT 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 Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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For specific information on the capabilities and use of the operator panel, please refer to Chapter 4 ( ) in the Printer Handbook. 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)
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These AC voltages are rectified into + 8 vdc, + 5 vdc, and + 50 vdc levels by the DC power supply circuitry on the main controller board. 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)
All character fonts Q12 has a battery backup. Data is retained even after power is removed. 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: 22 Service Guide ML320/ML321 Chapter 2 Principles of Operation Large Scale Integrated Circuitry (LSI) For the Rev A, B, and C printers, the LSI is Q11 - MSM6990 For the Rev D printers, the LSI is Q3 - 7U042-026.
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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)
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 reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
The program then establishes the interface signals (ACK, BUSY) and the SEL lamp lights. 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)
The BUSY signal is also sent to the host whenever the printer is incapable of receiving data. 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)
IPT, which is derived from the timing encoder (PHASE A and PHASE B) on the 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 material. (http://bpx.okidata.com)
The LSI generates the IPT-N signal, which provides dot-on timing and carriage position detection. 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)
When it is not being driven, the line feed motor is held in place by the LF HOLD signal. 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)
This causes the signal PAPER END to become low. This signal is fed to a pin of the motor control LSI. Printing stops and the ALARM lamp lights. 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)
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Page: 30 Service Guide ML320/ML321 Chapter 2 Principles of Operation MECHANICAL PRINCIPLES OF OPERATION...
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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: 31 Service Guide ML320/ML321 Chapter 2 Principles of Operation 2.4.01 Printhead The printhead used by the printer is a highly efficient, stored-energy type. Power is not consumed until the pins are activated. Printhead life is approximately 200 million characters.
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110 degree Celsius threshold, the BUSY signal to the host computer becomes inactive. Printing is resumed. 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: 32 Service Guide ML320/ML321 Chapter 2 Principles of Operation 2.4.02 Space Mechanism / Operation The spacing operation is performed by applying power to the DC spacing motor. This drives the carriage frame along the carriage shaft, space rack, and guide rail. The carriage shaft, space rack, and guide rail are parallel to the platen.
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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 reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 33 Service Guide ML320/ML321 Chapter 2 Principles of Operation Head Gap Adjusting Mechanism The head gap adjusting mechanism adjusts the gap between the platen and printhead by changing the tilt angle of the carriage frame. This is accomplished by using the adjusting lever.
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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: 34 Service Guide ML320/ML321 Chapter 2 Principles of Operation 2.4.03 Ribbon Drive Mechanism / Operation NOTE: The ribbon drive gear assembly is secured to the top of the spacing motor assembly by the four claw tabs. The ribbon drive mechanism drives the ribbon in sync with the spacing operation. The mechanism is driven by the spacing motor.
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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: 35 Service Guide ML320/ML321 Chapter 2 Principles of Operation 2.4.04 Paper Feed Mechanism The paper feed mechanism consists of the following items. Stepper Motor (with drive gear) Reduction Gear Platen Push Tractor Unit Pressure Rollers (friction feed rollers) Pull Tractor Unit (optional) Paper Feed Operation The line feed motor is mounted on the left side frame of the printer.
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Tractor Feed When the release lever is set to the 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, which allows paper to be fed by the push tractor.
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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: 36 Service Guide ML320/ML321 Chapter 2 Principles of Operation 2.4.05 Paper-End Detection Mechanism Rear Paper Feed When paper is installed in the printer, it prevents the paper-end lever (Tip A) from falling into the groove of the paper chute and platen. This activates the paper-end sensor.
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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)
FORM FEED. Since the paper bail is opened for SASF, there is less chance of jamming. 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)
Maintenance & Disassembly 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 OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Page: 39 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.1.01 General Information This section lists the parts replacement, adjustment, cleaning, and lubrication procedures. Disassembly should not be performed unless absolutely necessary. NEVER perform disassembly on a malfunctioning unit until you have followed the failure analysis procedures ( ) in Section Four of this Service Handbook.
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When disassembling, follow the listed sequence. Failure to follow the correct sequence may result in damaged parts. Since screws, collars and other small parts are easily lost, they should be temporarily attached to the original positions. When handling circuit boards use extreme care. Integrated circuits (microprocessors, ROM, and RAM) can be destroyed by static electricity.
Refer to the following to decode the serial number. Example Printer Serial Number: 401D0154693 Date Code 401 (4 = year. 01 = month) Revision Serial Number 0154693 Item Okidata Purpose / Function of Item LXMC 55041411 Main Control Board Board LXMC-...
LXON 55075011 Operator Panel Board (with SSD) 50069603 Operator Panel Bezel 50107426 Operator Panel Bezel (with SSD) Transformer Item Okidata Purpose / Function of Item 56407503 Transformer - Microline 320 Volt XFRMR 56407502 Transformer - Microline 321 Volt XFRMR 56413201...
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Middle Cover - Microline 320 (with SSD) Chassis 50104601 Middle Cover - Microline 321 (with SSD) 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)
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This section contains the printer disassembly procedures. Only the removal procedures are explained. Reverse the procedure for the installation. At the bottom of each procedure is a listing of the parts covered in that procedure. The Okidata part number, item description, applicable product, comment (RSPL, Option, Consumable), serial number revision level, and the cross-reference(s) to Appendix B are provided for each part.
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Page: 41 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.01 Preliminary Items 1) Press the AC switch (1 shows location) and power OFF the printer. 2) Remove the paper, if installed. 3) Detach the AC power cord (2). 4) Detach the interface cable (3), if installed.
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A B C D B.2.05 56624401 Kit: Parallel Interface Both Option A B C D 70000803 Plug'n'Play Accessory 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)
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Page: 42 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.02 Separator Assembly CAUTION: To avoid damaging the ribbon protector, slide the printhead towards the center of the printer before removing the separator assembly. Perform these procedures first: - 3.2.01 ( ) - Open the access cover (1).
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B.2.06 08 10 50069801 (Narrow) Separator: Assembly RSPL A B C D B.2.06 08 10 50069901 (Wide) 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)
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Page: 43 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.03 Printhead Assembly WARNING: The printhead will be hot immediately after printing. Allow the printhead to cool before handling. Perform these procedures first: - 3.2.01 ( ) - Open the access cover (1).
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A B C D B.2.03 04 05 50063802 (Assembly) Ribbon Both Consumable A B C D B.2.16 52102001 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)
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Page: 44 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.04 Upper Cover Assembly Perform these procedures first: - 3.2.01 ( ) Wrap a rubber band around the wire extensions of the interface connector. This pulls the extensions in and avoids damage when the cover is removed. (Notshown).
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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.
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Before installing the cover, move the bail arm lever towards the back of the printer and move the release lever towards the front of the printer. After installation, verify that the cover is correctly seated in the front slots. The cover will warp if it is incorrectly installed.
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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)
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Page: 45 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.05 Operator Panel Assembly NOTE: The operator panel assembly and board for the Rev D units are NOT compatible with the Rev A, B, and C operator panel assembly and board.
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Part Item App. B Number Description Product Comment Revision Reference Panel: Operation Both RSPL A B C B.2.12 50069603 w/Frame (Assembly)
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B.2.12 55038602 (Operator PCB) PCB: LXON Both RSPL B.2.12 55075011 (Assembly) SSD Op Panel PCB 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)
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Page: 46 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.06 Control Board Rev A and B CAUTION: Check the contacts between the power interconnect module, the control board, and the power supply board (Rev A and B units ONLY). Clean the contacts if dirty.
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NOTE: When installing, verify that correct contacts 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 paper end sensor. If the lever is not correctly...
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Board) Lock: Board Screw Both RSPL A B C D B.2.03 04 05 50605501 (LXMC) 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)
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Page: 47 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Control Board Rev C CAUTION: Check the contacts and connections of the control board. If good contact is not made at all connections and ground points, false diagnosis will occur.
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NOTE: When installing, verify that correct contacts are made at these points. - Guides (A and B) - Linefeed Motor Interconnect Module (C) - Sensor Lever (D)
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55041412 Lock: Board Screw Both RSPL A B C D B.2.03 04 05 50605501 (LXMC) 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)
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Page: 48 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Control Board (Rev D) CAUTION: Check the contacts and connections of the control board. If good contact is not made at all connections and ground points, false diagnosis will occur.
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NOTE: When installing, verify that correct contacts are made at these points. - Guides (A and B) - Linefeed Motor Interconnect Module (C) - Sensor Lever (D) - Printhead Cable Connector (E) The 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.
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PCB: LXMR Both RSPL B.2.05` 55075111 (Assembly) SSD w/o ROMs (Control Board) 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)
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Page: 49 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.07 IC Card (A) Panel NOTE: The Rev D printers do not have this 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.
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Panel: IC Card (A) Both RSPL A B C B.2.06 08 53494901 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)
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Page: 50 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.08 Transformer Revs A and B NOTE: The transformer contains a built-in temperature fuse. Once the fuse opens, the transformer MUST be replaced. The Rev A, B, and C transformers are NOT compatible with the Rev D transformer.
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A B C B.2.03 04 56407901 RSPL Transformer: 220/240 Option A B C B.2.03 04 56407902 RSPL 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: 51 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Transformer Rev C NOTE: The transformer contains a built-in temperature fuse. Once the fuse opens, the transformer MUST be replaced. The Revs A, B, and C transformers are NOT compatible with the Rev D transformer.
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A B C B.2.03 04 56407901 RSPL Transformer: 220/240 Option A B C B.2.03 04 56407902 RSPL 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: 52 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Transformer Rev D NOTE: The transformer contains a built-in temperature fuse. Once the fuse opens, the transformer MUST be replaced. The Revs A, B, and C transformers are NOT compatible with the Rev D transformer.
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SSD 320 Option B.2.05 56413301 230/240V RSPL Transformer: SSD 321 Option B.2.05 56413302 230/240V RSPL 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: 53 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.09 Filter Assembly Perform these procedures first: - 3.2.01 ( ) - 3.2.04 ( ) - Working from the bottom of the chassis, push on and release the claw (1) of the filter assembly (2).
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Fuse: 1.5 amp 250 V Both Option A B C D B.2.03 04 05 56303402 (Filter Board) 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: 54 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.10 Power Supply Board Revs A and B NOTES: The Rev D printers do NOT have a power supply board. The control board contains circuitry to provide the power supply function.
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A B C B.2.03 04 56302502 Cable: Power Supply Both RSPL B.2.04 56616802 Nylon Conn 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 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Power Supply Boards Rev C NOTES: The Rev D printers do NOT have a power supply board. The control board contains circuitry to provide the power supply function. Refer to Appendix A for more information on this board.
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A B C B.2.03 04 56302502 Cable: Power Supply Both RSPL B.2.04 56616802 Nylon Conn 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: 56 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.11 Power Interconnect Module / Cable Guide Revs A and B NOTES: 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.
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Commen Revision Number Description Reference Module: Power Module: Both B.2.06 53328301 Interconnect Power Inter- connect 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: 57 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Power Interconnect Module / Cable Guide Rev C NOTES: 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.
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Guide: Cable RSPL B.2.08 10 51003801 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: 58 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Power Interconnect Module / Cable Guide (Rev D) NOTES: 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.
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Guide: Cable RSPL B.2.08 10 51003801 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: 59 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.12 Indicator Assembly (Bail Bar Assembly) Perform these procedures first: - 3.2.01 ( ) - 3.2.04 ( ) - 3.2.05 ( ) - 3.2.06 ( ) - Use needle-nose pliers to remove the left bail arm spring (1).
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Part Item App. B Product Commen Revision Number Description Reference Spring: Bail Arm (L) Both RSPL A B C D B.2.06 08 10 50911801 Bail Arm (L) Both RSPL A B C D B.2.06 08 10 53489301 Spring: Bail Arm (R) Both RSPL A B C D...
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Indicator (Assembly) RSPL A B C D B.2.06 08 10 50061502 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 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.13 Head Cable Access Cover NOTE: Remove this cover 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 ( )
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Cover: Head Cable Both RSPL A B C B.2.06 08 50062301 Access 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: 61 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.14 Ribbon Drive Assembly CAUTION: When handling the head cable, do NOT bend the cable at sharp angles or you may damage it. Perform these procedures first: - 3.2.01 ( ) - 3.2.04 ( )
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A B C D B.2.13 56616302 (Flexible) Rubber: Contact Both RSPL A B C D B.2.13 51706501 Pressure 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 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.15 Space Motor Assembly Perform these procedures 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.
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A B C D B.2.13 56718601 Motor: Space Both RSPL A B C D B.2.13 56507202 (Assembly) 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)
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NOTES: Installation - After installing the carriage shaft, check the printhead gap adjustment. Refer to Section 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.
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A B C D B.2.13 53490401 (Assembly) Protector: Ribbon Both RSPL A B C D B.2.13 53056201 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: 64 Service Guide ML320/ML321 Chapter 3 Maintenance & 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.
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NOTES: Installation - Fully seat the two guide 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 space rack, printing problems will occur.
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B.2.06 08 10 53489402 Spring: Tension Both RSPL A B C D B.2.06 08 10 50911901 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: 65 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.18 Guide Rail Perform these procedures first: - 3.2.01 ( ) - 3.2.04 ( ) - 3.2.14 ( ) - 3.2.15 ( ). - Pull the adjusting cam (1) out and rotate it to the horizontal position.
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NOTE: After installing the guide rail, check the printhead gap adjustment. Refer to Section 3.3 of this Service Handbook. Part Item App. B Product Commen Revision Number Description Reference Rail: Guide RSPL A B C D B.2.06 08 10 51002101 Rail: Guide RSPL A B C D...
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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: 66 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.19 Platen Assembly Perform these procedures first: - 3.2.01 ( ) - 3.2.02 ( ) - 3.2.04 ( ) - Push the release lever (1) to the rear of the printer.
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B.2.06 08 10 50061305 Platen: (Assembly) RSPL A B C D B.2.06 08 10 50061306 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: 67 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.20 Line Feed Motor and Gear Line Feed Motor NOTES: Use care when performing this procedure. The plastic claws will break if too much pressure is applied. If the line feed motor gear breaks or becomes worn, it is not necessary to replace the entire line feed motor assembly.
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CAUTION: Installation If the line feed motor assembly is not correctly installed, excessive wear of the platen gears will occur. Verify that the tabs are not bent. If the tabs are bent, straighten them. The assembly will not seat if the tabs are bent. If the assembly is not seated correctly, the gears will not correctly align.
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Description Reference Motor: Line Feed Both RSPL A B C D B.2.07 09 11 56507003 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)
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Page: 68 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly Line Feed Motor Gear NOTES: If the line feed motor gear breaks or becomes worn, it is not necessary to replace the entire line feed motor assembly. The gear can be replaced without removing the line feed motor assembly.
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CAUTION: If the claws do not lock into the groove of the support shaft, the gear will "walk" off the shaft during use. Verify that the line feed motor gear and line feed motor assembly are correctly installed. Verify that the line feed motor gear and the platen gears are correctly aligned. Incorrect installation and alignment will cause line feed motor gear breakage and wearing.
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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: 69 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.21 Line Feed Motor Interconnect Module NOTE: Use care when performing this procedure. The plastic extension will break if too much pressure is applied. Perform these procedures first: - 3.2.01 ( ) - 3.2.02 ( )
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Module: LF Motor Both RSPL A B C D B.2.07 09 11 53328401 Interconnect 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: 70 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.22 Reset Spring, Change Gear, and Idler Gear CAUTION: - Please read through this entire procedure before performing it. - Do NOT press against the vertical extension of the reset spring at any time during this procedure.
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Idler Gear Included Both A B C D B.2.07 09 11 51216001 in the Idler/Change Gear Kit 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)
Number Description Reference Lever: Release Both RSPL A B C D B.2.07 09 11 53489501 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: 72 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.24 Paper Pressure Guide Perform these procedures first: - 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.
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NOTE: When installing the paper pressure guide, be sure to fit it into the projections (5) and guide 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 Item App.
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B.2.07 09 11 50911602 Pressure Spring: Support RSPL A B C D B.2.07 09 11 50913901 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)
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B.2.07 09 11 50061701 (Assembly) Link: Release Both RSPL A B C D B.2.07 09 11 53489601 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: 74 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.26 Tractor Assembly NOTE: Horizontal movement of the left tractor is restricted by a stopper on the lower cover. Perform these procedures first: - 3.2.01 ( ) - 3.2.02 ( ) - 3.2.04 ( )
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NOTES: Installation The tractors must be synchronized. The pins (14) on the left and right tractors must be aligned when installed. Also, verify that the guide holes (15) in the tractor drive gears are facing the same direction. The left tractor assembly must be positioned to the left (line feed motor side) of the plastic tab and ground plate.
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A B C D B.2.14 51109602 Sheet Guide Both RSPL A B C D B.2.14 51004901 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)
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Commen Revision Reference Lever: Sensor Both RSPL A B C D B.2.07 09 11 53489001 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: 76 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.2.28 Paper End (B) Lever NOTE: The paper end lever guide is accessed from the bottom of the printer. Perform these procedures first: - 3.2.01 ( ) - 3.2.02 ( ) - 3.2.04 ( )
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Part Item App. B Product Commen Revision Number Description Reference Lever: Paper End (B) RSPL A B C D B.2.07 09 11 53488901 Lever: Paper End (B) RSPL A B C D B.2.07 09 11 53488902 Cover: Sensor Both RSPL A B C D B.2.07 09 11 53489101...
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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)
(Assembly) Chassis: Main RSPL B.2.11 50104501 (Assembly) SSD Chassis: Main RSPL B.2.11 50104601 (Assembly) SSD 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)
Failure to perform these procedures may result in unnecessary service calls. 3.3.01 Printhead Gap Adjustment . 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)
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Page: 79 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly 3.3.01 Printhead Gap Adjustment Before performing this adjustment, always verify that the printhead is properly installed. The printhead gap should measure: Rev A, B, and C: 0.016 inch, + / - 0.002 inch Rev D: 0.018 inch, + / - 0.002 inch...
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3) Place the paper bail bar in the OPEN position. 4) Set the adjusting lever to Position 1. 5) Place the adjust cam in the vertical position. 6) Slide the carriage assembly to the left (line feed motor) side of the platen. 7) Use a feeler gauge to check the printhead gap.
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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 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly CLEANING 3.4.01 General Information An accumulation of paper dust is the most frequent cause of print quality problems in a dot matrix printer. Small pieces of paper can cause paper jams. A dirty platen will smudge paper. It is important to clean the printer regularly, paying particular attention to the printhead area and paper paths.
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Platen Cloth Wipe the surface of 3.2.29 Platen Cleaner the platen with platen cleaner. 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: 81 Service Guide ML320/ML321 Chapter 3 Maintenance & Disassembly LUBRICATION 3.5.01 General Information If the lubrication procedures are not performed properly, the printer will require more frequent cleaning. Excessive lubricant attracts dust and accumulations build up quickly. An accumulation of paper dust is the most frequent cause of print quality problems in a dot matrix printer.
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Machine Oil Small Turn the Space Motor 3.2.15 assembly over Assembly. to access the Contact point. Do not between the over-lubricate. space motor Do NOT place assembly gear lubricant directly and the space on the space rack. rack. Machine Oil Small Place a small Carriage Shaft...
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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 reserved. See the OKIDATA Business Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
If you encounter a situation that is not addressed by the documentation in this 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.
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Refer to the following to decode the serial number. Example Printer Serial Number: 401D0154693 Date Code 401 (4 = year. 01 = month) Revision Serial Number 0154693 Item Okidata Purpose / Function of Item LXMC 55041411 Main Control Board Board LXMC-...
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Power supply function included on the Main Control Board Operator Panel Assembly Item Okidata Purpose / Function of Item LXSP-2 55038602 Operator Panel Board LXON 55075011 Operator Panel Board (with SSD) 50069603 Operator Panel Bezel 50107426 Operator Panel Bezel (with SSD)
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Cable Item Okidata Purpose / Function of Item Cable 56616802 Connects power supply board to main board Cable Guide Item Okidata Purpose / Function of Item Cable 51003801 Holds cable in place Guide Covers Item Okidata Purpose / Function of Item...
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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)
Check the contacts and connections of the control 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 Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 84 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.4.02 Common Problems Nothing happens when the printer is powered ON. Make sure the printer is plugged in. Check the power cord connection to the printer and the outlet.
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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: 85 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.5 FAULT ALARMS 4.5.01 General Information The operator panel is used to display printer modes and error conditions. The table below shows the operator panel display and the mode or condition it matches.
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Printer Modes - Rev D ALAR SELECT MENU Printer Status Description Lamp Lamp Mode Lamp Status Status Status Normal On-Line The printer is ready to receive data Operation and to print. Normal Hex Dump The printer is in Hex Dump Mode. Operation Refer to Section 4.7( ) Normal...
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Blinking External RAM Error Replace the control board Blinking Spacing<R>Error Go to RAP 02 ( ) Blinking Serial Interface Replace the Serial Error Interface Board Fault Alarm Conditions - Rev D ALARM SELEC Error Action Lamp TLamp Conditio Lamp Status Status Statu Curre...
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Check the contacts and connections of the control 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 Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
If the RAPs do not lead you to the cause of a problem, please report this to Okidata. 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)
Malfunction of Operator Panel Switch(es)......( ) Parallel Interface Does Not Receive Data......( Serial Interface Does Not Receive Data......( 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)
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Check the contacts and connections of the control 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 Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 89 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 01A:Operator Panel Lamps Do Not Light - Rev A, B, and C START Are the AC cables connected correctly? Connect the AC cables correctly. Is the problem resolved? End of procedure.
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Replace the power supply board. Is the problem resolved? End of procedure. 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.okidata.com)
Page: 90 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 01B:Operator Panel Lamps Do Not Light - Rev D START Are the AC cables connected correctly? Connect the AC cables correctly. Is the problem resolved? End of procedure.
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Go to the next step listed below. Replace the transformer. Is the problem resolved? End of procedure. 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.okidata.com)
Page: 91 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 02A:Abnormal Spacing - Rev A, B, and C START Check the movement (Steps A and B) of the carriage assembly. Does the assembly vibrate back and forth in the same location or does it move sharply to the left or right end of the carriage shaft? Replace the control board.
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+ 40 vdc Take the voltage reading between Pin 1 and Pin 5 of CN2 on the power supply board. Replace the control board. End of procedure. Go to D Go to D Are the power supply board and the control board connected properly? Replace the power supply board.
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End of procedure. 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.okidata.com)
Page: 92 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 02B:Abnormal Spacing - Rev D START Check the movement (Steps A and B) of the carriage assembly. Does the assembly vibrate back and forth in the same location or does it move sharply to the left or right end of the carriage shaft? Replace the control board.
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Replace the control board. Is the problem resolved? End of procedure. Replace the space motor. Is the problem resolved? End of procedure. Contact Technical Support. Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business...
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 93 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 03:Wrong or Missing Characters / Dots on Output START Is the head cable correctly inserted into CN2 of the control board? Correctly insert the cable. Is the problem resolved? End of procedure.
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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: 94 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 04:Line Feed Problems NOTE: Before performing this RAP, check the following. 1. Is the head gap correctly set for the type of paper being used? 2. Remove the printhead. Examine the pins. Do they appear damaged? If so, replace the printhead.
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Contact Technical Support. Correct the contact. Is the problem resolved? End of procedure. 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.okidata.com)
End of procedure. Replace the control board. Is the problem resolved? End of procedure. 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.okidata.com)
End of procedure. Replace the control board. Is the problem resolved? End of procedure. Call 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.okidata.com)
Page: 97 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis RAP 07:Serial Interface Does Not Receive Data NOTE: Before performing the procedures of this RAP, make sure that the correct protocols are selected. Print the Menu to check protocol settings. For information on printing the Menu, refer to Section 4.10...
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Is the problem resolved? End of procedure. 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.okidata.com)
65 63 69 6D 61 6C 20 64 75 6D 70 2E 0D 0A This is an example of a hexadecimal dump... 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)
Rev D ......( ) Control Board Rev A, B, C, D ... ( ) 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)
Service Guide ML320/ML321 Chapter 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 to this material. (http://bpx.okidata.com)
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Page: 101 Service Guide ML320/ML321 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 this material. (http://bpx.okidata.com)
Page: 102 Service Guide ML320/ML321 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 this material. (http://bpx.okidata.com)
Page: 103 Service Guide ML320/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 material. (http://bpx.okidata.com)
Page: 104 Service Guide ML320/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 material. (http://bpx.okidata.com)
Page: 105 Service Guide ML320/ML321 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 this material. (http://bpx.okidata.com)
Chapter 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 to this material. (http://bpx.okidata.com)
Page: 107 Service Guide ML320/ML321 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 this material. (http://bpx.okidata.com)
Service Guide ML320/ML321 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 this material. (http://bpx.okidata.com)
The Serial Interface Loopback Test is used to test proper operation of the Serial Interface Board. 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)
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Page: 110 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.9.02 Rolling ASCII Print Test General Information The Rolling ASCII Print Test produces a continuous printout of all 96 ASCII characters in a rolling pattern. The type style set in the printer menu will be utilized.
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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)
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Page: 111 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.9.03 Font Sample Test General Information This test will print samples of these fonts. LQ - ROMAN 10 cpi LQ - SWISS 10 cpi LQ - COURIER 10 cpi,12 cpi, 15 cpi, 17.1 cpi, 20 cpi...
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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)
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Page: 112 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.9.04 Serial Interface Loopback Test NOTE: Attach a serial loopback test connector to the printer's serial port to run this test. General Information The Serial Interface Loopback Test checks the operation of the serial interface board.
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Press MODE to record the changes and return to Print Mode. The MENU lamp will go out and the SEL lamp will light. Serial Loopback Plug Diagram 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: 113 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.10 MENU OPERATION 4.10.01 General Information The end user can customize printer features by changing menu settings. These settings are automatically activated when the printer is powered ON. Selections made in Menu Mode are stored in the printer's permanent memory. They will stay in effect, even when the printer is powered OFF.
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Power OFF the printer. Press and hold the PARK and TOF/QUIET switches while powering ON the printer. 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: 114 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.11 TOP OF FORM 4.11.01 General Information Top of Form sets the print start position for the printer. It is adjustable in increments of 1/144 of an inch. The amount of adjustment is limited to avoid paper jams.
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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, 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: 115 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.12 PAPER PARK 4.12.01 General Information Paper Park allows single sheet paper to be printed without removing continuous feed paper from the printer. 4.12.02 Procedure Remove any printed pages.
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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: 116 Service Guide ML320/ML321 Chapter 4 Failure & Repair Analysis 4.13 FORMS TEAR OFF 4.13.01 General Information This feature allows a printed page (rear feed, continuous form) to be torn off without wasting paper or adjusting the printer. Forms Tear Off advances the paper from the initial printing position to the tear off position.
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Press and hold TOF/Quiet. The paper will retract to the initial print position. Release TOF/Quiet. The paper will advance to the forms tear off 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: 117 Service Guide ML320/ML321 Chapter A Reference Charts BOARD DIAGRAMS A.1.01 General Information This section describes the characteristics of the printed circuit boards used in the Microline 320 and Microline 321 printers. The following areas are covered in each section.
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Example Printer Serial Number: 401D0154693 Date Code 401 (4 = year. 01 = month) Revision Serial Number 0154693 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: 118 Service Guide ML320/ML321 Chapter A Reference Charts INDEX TO CHARTS Rev A and B Description Board Designation - Rev Section Control Board LXMC A and B A.2.01 ( ) Power Supply PAII-2 A and B A.2.04 ( )
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RS232-C Serial LXHI A, B, C, and D A.2.09 ( ) Interface Rev D Description Board Designation - Rev Section Control Board LXMR A.2.03 ( ) Filter Assembly A, B, C, and D A.2.06 ( ) Operator Panel LXSP A.2.08 ( ) RS232-C Serial LXHI A, B, C, and D...
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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: 119 Service Guide ML320/ML321 Chapter A Reference Charts A.2.01 Control Board (LXMC) - Rev A and B Function The control board contains the microprocessor and its peripheral circuits. The drive circuits, paper end sensor, and the interface connector are on this board. A 3.25 V lithium battery is on this board.
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CN6to power supply CN7to line feed motor Diagram - PCB Version Numbers 2 - 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: 120 Service Guide ML320/ML321 Chapter A Reference Charts A.2.02 Control Board (LXMC-3) - Rev C Function The control board contains the microprocessor and its peripheral circuits. The drive circuits, paper end sensor, and the interface connector are on this board. A 3.25 V lithium battery is on this board.
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R5+ 38 vdc SP3 B Side+ 5 vdc MTDV Pin 3 + 8 vdc Notes The LXMC-3 Board has gone through a modification. The older version of the board accepted a 28 pin EPROM at the Q13 socket location. The newer version of the board accepts a 32 pin masked ROM.
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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: 121 Service Guide ML320/ML321 Chapter A Reference Charts A.2.03 Control Board (LXMR) - Rev D Function The control board contains the microprocessor and its peripheral circuits. 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 voltage.
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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: 122 Service Guide ML320/ML321 Chapter A Reference Charts A.2.04 Power Supply (PAII-2) - Rev A and B Function This board converts and regulates the AC voltage input to DC voltage and supplies the DC voltage to the control board.
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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: 123 Service Guide ML320/ML321 Chapter A Reference Charts A.2.05 Power Supply (SUII-2) - Rev C Function This board converts 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...
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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: 124 Service Guide ML320/ML321 Chapter A Reference Charts A.2.06 Filter Assembly - Rev A, B, C, and D Function This assembly is a protective feature. 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.
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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)
CHARACTER PITCH Displays SELECT ALARM 10 cpi POWER 20 cpi Not used Not used 12 cpi MENU PROP TOF / QUIET 17 cpi Test Points NONE Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business...
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
12 cpi Not used PROP Not used Not used 10 cpi 17 cpi Test Points NONE 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)
Version 2SP1 Side BCPU Masked ROM is utilized Sensors NONE Switches NONE Test Points NONE 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)
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For instructions on accessing Okilink II, refer to the Service Center Reference Guide. Okidata's Faxable Facts is an automated fax document retrieval system. Part numbers and pricing are available through Faxable Facts. For instructions on accessing Faxable Facts, refer to the Service Center Reference Guide.
Various documents are available from Okidata. Blank Okidata does not recommend stocking this item. This item should be purchased on an As Required Basis only. The availability of this item is not guaranteed by Okidata. This part is found ONLY in the Microline 320 printer.
Page: 130 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2 Index to Illustrated Parts Breakdown Charts Below is an index to the illustrated parts breakdown charts. Description Section Covers - Rev A, B, and C B.2.01 ..( ) Covers - Rev D B.2.02...
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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: 131 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.01 Covers - Rev A, B, and C Part numbers are subject to change. Okidata PN / Description Model Comments Disassembly Serial #. OKI-J PN Section Rev Level 53488302 Cover: Middle (ML320)
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1PA4016-6569 (Assembly) 50061001 Separator: Sheet RSPL A B C D 3.2.04 ( ) 1PA4016-6570 (Assembly) 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: 132 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.02 Covers - Rev D Part numbers are subject to change. Okidata PN / Description Model Comment Disassembly Serial #. OKI-J PN Section Rev Level 53070701 Cover: Middle (SSD) RSPL 3.2.04 ( )
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1PA4016-6569 (Assembly) 50061001 Separator: Sheet RSPL A B C D 3.2.04 ( ) 1PA4016-6570 (Assembly) 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: 133 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.03 Electrical Components - Rev A and B Okidata PN / Description Model Comment Disassemb Serial #. OKI-J PN ly Section Rev Level 56609701 Cord: AC 120 V Both RSPL A B C D 3.2.01 ( )
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56616501 Cord: AC 240V 320/3 Option A B C D 3.2.01 ( ) 3YS4011-1192 50063802 Printhead: (Assembly) Both RSPL A B C D 3.2.03 ( ) 4YA4025-1401 51901101 Knob: Platen Both RSPL A B C D 3.2.04 ( ) 3PP4025-2871 50704301 Clamp: PCB Both...
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(PAII or SUII Board) 56302502 Fuse: 250V 1A Both Option A B C 3.2.10 ( ) FP-21093-1 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: 134 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.04 Electrical Components - Rev C Part numbers are subject to change. Okidata PN / Description Model Comment Disassemb Serial #. OKI-J PN ly Section Rev Level 56609701 Cord: AC 120 V...
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56624101 Cord: AC (220 V) (ML Both Option A B C D 3.2.01 ( ) 3YS4011-1265 Series) RSPL 56616501 Cord: AC 240V 320/3 Option A B C D 3.2.01 ( ) 3YS4011-1192 50063802 Printhead: (Assembly) Both RSPL A B C D 3.2.03 ( ) 4YA4025-1401 51901101...
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(PAII or SUII Board) 56302502 Fuse: 250V 1A Both Option A B C 3.2.10 ( ) FP-21093-1 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: 135 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.05 Electrical Components - Rev D Part numbers are subject to change. Okidata PN / Description Model Comment Disassemb Serial #. OKI-J PN ly Section Level 56609701 Cord: AC 120 V...
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Fuse: 1.5 amp 250 V Both Option A B C D 3.2.09 ( ) FP-21107-1 (Filter Board) 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)
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Page: 136 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.06 Printer Mechanism - Rev A and B (1 of 2) Part numbers are subject to change. Okidata PN / Description Model Comment Disassemb Serial #. OKI-J PN ly Section...
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50069901 Separator: Assembly RSPL A B C D 3.2.02 ( ) 3PA4025-2978 (Wide) 53494901 Panel: IC Card (A) Both RSPL A B C 3.2.07 ( ) 2PP4025-2952 53328301 Modul e : Power Both 3.2.11 ( ) 3PB4025-2911 Interconnect 50061501 Indicator (Assembly) RSPL A B C D 3.2.12 ( )
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3.2.19 ( ) 3PA4025-2811 50061306 Platen: (Assembly) RSPL 3.2.19 ( ) A B C D 3PA4025-2811 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)
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Page: 137 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.07 Printer Mechanism - Rev A and B (2 of 2) Part numbers are subject to change. Okidata PN / Description Model Comment Disassem Serial #. OKI-J PN Rev Level...
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56507003 Motor: Line Feed Both RSPL A B C D 3.2.20 ( 3PB4025-2844 53328401 Module: Motor Both RSPL A B C D 3.2.21 ( 3PP4025-2874 Interconnect 58227501 Kit: Idler/Change Gear Both RSPL<R> A B C D 3.2.22 ( (ML300) I n c . and 41 51216001 Idler Gear...
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(Assembly) 50061201 Chassi s : Mai n RSPL A B C 3.2.29 ( 3PA4025-2902 (Assembly) 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)
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Page: 138 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.08 Printer Mechanism - Rev C (1 of 2) Part numbers are subject to change. Okidata PN / Description Model Comment Disasse Serial #. OKI-J PN mbly Section Level 50069801...
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50069901 Separator: Assembly RSPL 3.2.02( A B C D 3PA4025-2978 (Wide) 53494901 Panel: IC Card (A) Both RSPL 3.2.07( A B C 2PP4025-2952 51003801 Guide: Cable RSPL 3.2.11( C D PCB 4PB4025-3180 V e r and after 50061501 Indicator (Assembly) RSPL 3.2.12( A B C D...
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A B C D 3PA4025-2811 50061306 Platen: (Assembly) RSPL 3.2.19( A B C D 3PA4025-2811 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)
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Page: 139 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.09 Printer Mechanism - Rev C (2 of 2) Part numbers are subject to change. Okidata PN / Description Model Comment Disasse Serial #. OKI-J PN mbly Rev Level Section...
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56507003 Motor: Line Feed Both RSPL 3.2.20 A B C D 3PB4025-2844 53328401 Module: Motor Both RSPL 3.2.21 A B C D 3PP4025-2874 Interconnect 58227501 Kit: Idler/Change Gear Both RSPL<R>I 3.2.22 A B C D (ML300) nc. 39 and 51216001 Idler Gear Both 3.2.22...
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3PA4025-2802 (Assembly) 50061201 Chassi s : Mai n RSPL 3.2.29 A B C 3PA4025-2902 (Assembly) 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)
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Page: 140 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.10 Printer Mechanism - Rev D (1 of 2) Part numbers are subject to change. Okidata PN / Description Model Comment Disasse Serial #. OKI-J PN mbly Rev Level Section...
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50069901 Separator: Assembly RSPL 3.2.02 A B C D 3PA4025-2978 (Wide) 51003801 Guide: Cable RSPL 3.2.11 C D PCB 4PB4025-3180 V e r and after 50061501 Indicator (Assembly) RSPL 3.2.12 A B C D 4PA4025-2838 50061502 Indicator (Assembly) RSPL 3.2.12 A B C D 4PA4025-2838 53489201...
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A B C D 3PA4025-2811 50061306 Platen: (Assembly) RSPL 3.2.19 A B C D 3PA4025-2811 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)
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Page: 141 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.11 Printer Mechanism - Rev D (2 of 2) Part numbers are subject to change. Okidata PN / Description Model Comment Disasse Serial #. OKI-J PN mbly Section Level 51219001...
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56507003 Motor: Line Feed Both RSPL 3.2.20 A B C D 3PB4025-2844 53328401 Module: Motor Both RSPL 3.2.21 A B C D 3PP4025-2874 Interconnect 58227501 Kit: Idler/Change Gear Both RSPL<R> 3.2.22 A B C D (ML300) I n c . and 41 51216001 Idler Gear...
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(Assembly) SSD ML320 50104601 Chassi s : Mai n RSPL 3.2.29 3PA4025-3832 (Assembly) SSD ML321 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)
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Page: 142 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.12 Operator Panel - Rev A, B, C, and D Part numbers are subject to change. Okidata PN / Description Model Comment Disasse Serial #. OKI-J PN mbly Section Level...
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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)
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Page: 143 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.13 Carriage Assembly - Rev A, B, C, and D Part numbers are subject to change. Okidata PN / Description Model Comment Disassemb Serial #. OKI-J PN ly Section Level...
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3.2.16 ( ) 4PP4025-1048 53056201 Protector: Ribbon Both RSPL A B C D 3.2.16 ( ) 3PP4025-2836 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: 144 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.14 Tractor Assembly - Rev A, B, C, and D Part numbers are subject to change. Okidata PN / Description Model Comment Disassembl Serial #. OKI-J PN y Section Rev Level...
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3.2.26 ( ) 4PP4025-2865 51004901 Sheet Guide Both RSPL A B C D 3.2.26 ( ) 3PP4025-2927 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: 145 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.15 Options - Rev A, B, C, and D Part numbers are subject to change. Okidata PN / Description Model Comment Disassem Serial #. OKI-J PN Rev Level Section 53493201...
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A B C D 4PP4025-2887 RSPL Sheet Guide Both Option A B C D 4PP4025-2653 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)
OKI-J PN Section Rev Level 52102001 Ribbon Both Consuma A B C D 3.2.03 ( ) 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: 147 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.17 Packaging - Rev A, B, C, and D Part numbers are subject to change. Okidata PN / Description Model Comment Disassembly Serial #. OKI-J PN Section Rev Level 53496401...
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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: 148 Service Guide ML320/ML321 Chapter B Illustrated Parts Listing B.2.18 Documentation - Rev A, B, C, and D Part numbers are subject to change. Okidata PN / Description Model Comment Disassem Serial #. OKI-J PN Section Level 58302601 Product Update...
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Document A B C D Marketing Literature Both Document A B C D Order Form 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)
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