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Oki
3320, 3321 specifications Troubleshooting and Repair
Models:
3320
3321
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Troubleshooting
Specs
Parts list
Head Drive Timing Chart
Configuration
Before Repairing a Fault
MPU Reset
Assembly/Disassembly
Adjustment
Cleaning and Lubrication
Page 103
Image 103
6.
TROUBLESHOOTING AND REPAIR
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Page 104
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Image 103
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Contents
Printer
Preface
Table of Contents
Troubleshooting and Repair
Adjustment Cleaning and Lubrication
Appendix PCB Layout Spare Parts List
Configuration
Standard Printer Configuration
Configuration
Options
Page
Theory of Operation
Electrical Operation
Theory of Operation
TSD AUTO-LF
MPU Clock
CAS
MPU
RAS
CS1
EEDIN-P EECS-P EEDOUT-P EECLK-P Eeprom
Eeprom
LSI
Lsics ALE
ALE RDN WRL Lsic
Busy OFF
MPU Reset
LSI Reset
Check
MPU
Head Drive Timing Chart
Platen Pin coil current Pin 1 Pin 1, 2, 8 Print Head
Page
Hall AMP Input Output SPU SPV SPW Open
Utility Mode
PHASE-A PHASE-B Forward Reverse
LSI Optd Opck NPA2 Oprd Optxd Opclk
Optxd
Powlev
Temp Stop 119C Mode up Mode down
Uses of output voltages and signals are described below
Mechanical Operation
Page
When printing
Page
Page
Page
Range from 5 to
Page
Ribbon cartridge Drive gear Ink tank
Page
Rear
TOP
Bottom OFF
Bottom
TOP
Page
Platen gear Paper Idle gear Tractor gear Change gear
Pull tractor Drive gear Idle gear Platen gear Push tractor
Page
Page
Bottom Open TOP Close Rear
Bottom Rear
Page
Page
Page
Platen Ribbon protector Printhead Carriage frame assembly
Rear TOP Bottom SW2 SW1
Page
Park
ASSEMBLY/DISASSEMBLY
Precaution for Parts Replacement
ASSEMBLY/DISASSEMBLY
Service tools
Service Tools
Printer unit
Disassembly/Reassembly Procedure
Page
Page
Page
Page
Page
Page
Page
Page
Page
Claw
Page
Page
Sensor
Lock a
Page
Page
Page
Page
Page
Page
Page
Page
Page
Adjustment
Adjustment
Specification Drawing
Measured With Adjust lever
Confirm followings
Friction
Rotation of the push To confirm Tractor
Ribbon feed To confirm
Engagement
Cleaning and Lubrication
Cleaning
Cleaning and Lubrication
Carriage shaft
Lubrication
Lubrication point Ribbon feed gear Assy
Platen Assy
Tractor driving mechanism
Pressure roller
Pull up roller Assy
Main chassis Assy
Carriage Assy
Troubleshooting and Repair
Troubleshooting Table
Troubleshooting and Repair
Items to Check Before Repair
Lamp Display
Printer mode display
1/2
2/2
Page
HEAD9 HEAD7 HEAD5 HEAD3
Connection Circuit Check for Printhead and SP/LF Motor
CN1 HEAD1 HEAD2 HEAD4 HEAD6 HEAD8
Htemp
LF4
LF1 LF2 LF3
SP-W
SP-U SP-V
Troubleshooting flow chart
CN2
Page
Page
Pull up roller cover Platen Paper Ribon Protector
Page
Page
Page
Page
Page
Page
DTR
TXD
RXD
SSD
Page
Appendix a
Appendix a
Appendix a BIT Image Graph is DOT Density
PCB list
PCB Layout
Appendix B
Spare Parts List
Upper Cover Assy
Description Qty Remarks
Printer General Assy
ROM
1716 2931
Printer Unit
Description Qty
Carriage Assy
Carriage Option Assy
Option Spare Parts
LXHI-PCB RS232 I/F
Appendix C
Appendix C RS-232C Serial Interface Board General
Element Description
Operation Description
Circuit Description
ROM
If WR
RAM
Page
Mode a
Communication Procedure Flowchart
Figure C-2-3
Before Repairing a Fault
Troubleshooting Flowchart
Troubleshooting
Figure C-3-1
Figure C-3-3
Figure C-3-5
RTS CTS SSD DTR DSR
Local Test
Page
Appendix D CSF Option
People to People Technology
