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Oki
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ML390
Oki ML390 User Manual
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2
Table of Contents
Default Chapter
3
Table of Contents
3
About this Manual
7
1 Product Specifications
8
Compatibility - Microline 390/391 Vs. Microline
9
Product Specifications
14
Paper Specifications
18
Physical Specifications
21
Power Requirements
22
Environmental Requirements
23
Agency Approvals
24
Options
25
Consumables
26
Memory Specifications
27
Reliability Specifications
28
2 Principles of Operation
29
Compatibility - Microline 390/391 Vs. Microline
30
Circuit Board Description
35
Block Diagram (Microline 390/391)
38
Block Diagram (Microline 390/391-Plus)
39
Electrical Operation - Initialization
40
Interface Control
41
Print Head Drive Circuit
42
Spacing Operation
43
Line Feed
45
Alarm Circuits
46
Space Mechanism / Operation
50
Head Gap Adjusting Mechanism
52
Ribbon Drive Mechanism / Operation
56
Paper Feed Mechanism
58
Paper-End Detection Mechanism
61
Semi-Automatic Sheet Feeder (SASF) Operation
63
Release Lever Operation
64
3 Maintenance & Disassembly
66
Maintenance - General Information
66
Maintenance Tools
67
Maintenance Precautions
68
Disassembly/Assembly Procedures
69
Operator Panel Assembly
71
Preliminary Items
75
Separator Assembly
76
Printhead Assembly
78
Upper Cover Assembly
80
Control Board - Rev C
85
IC Card (B) Panel
89
Transformer Revs a and B
90
Filter Assembly
94
Power Supply Board Revs a and B
96
Power Interconnect Module / Cable Guide - Revs a
100
Power Interconnect Module / Cable Guide - Rev C
100
Indicator Assembly (Bail Bar Assembly)
104
Head Cable Access Cover and Connection Board
107
Ribbon Feed Gear Assembly
109
Space Motor Assembly
112
Carriage Frame Assembly
114
Space Rack
117
Guide Rail
119
Platen Assembly
121
Line Feed Motor and Gear Line Feed Motor
123
Line Feed Motor Interconnect Module
127
Reset Spring, Change Gear, and Idler Gear
128
Release Lever
130
Paper Pressure Guide
131
Pressure Roller Assembly
134
Tractor Assembly
136
Sensor Lever
138
Paper End (B) Lever
139
Main Chassis Assembly
141
ADJUSTMENTS General Information
142
Printhead Gap Adjustment
143
Cleaning
146
Lubrication
148
4 Failure & Repair Analysis
151
Overview - Introduction
151
Compatibility - Microline 390/391 Vs. Microline
152
Troubleshooting Updates
157
Reporting Problems
158
Troubleshooting Tips
160
Fault Alarms
162
Repair Analysis Procedures - Using the RAPS
169
RAP Index
170
Troubleshooting Cautions
171
RAP 01: Operator Panel Lamps Do Not Light
172
RAP 02: Abnormal Spacing
174
RAP 03: Wrong or Missing Characters / Dots on Output
176
RAP 04: Line Feed Problems
178
RAP 05: Malfunction of Operator Panel Switch(Es)
180
RAP 06: Parallel Interface Does Not Receive Data
181
RAP 07: Serial Interface Does Not Receive Data
182
Hexadecimal Dump
183
Resistance / Service Checks - Index to Charts
184
Printhead
184
Space Motor
184
Line Feed Motor
184
Operator Panel Board
184
Control Board
194
Printer Tests - General Information
195
Rolling ASCII Print Test
195
Font Sample Test
195
Serial Interface Loopback Test
195
Menu Operation
202
Top of Form
204
Paper Park
205
Forms Tear off
206
Board Reference Charts - General Information
208
A.1.02 Compatibility - Microline 390/391 Vs. Microline
209
Index to Charts - Microline 390/391: Rev a and B
214
Control Board (SKRB) - Rev a and B
217
Control Board (SKRA) - Rev C and "Plus" Printers
219
Power Supply (PAII) - Rev a and B
221
Power Supply (SUII) - Rev C and "Plus" Printers
224
A.2.05 Filter Assembly
226
Operator Panel (LXSP) - Microline
228
Operator Panel (LXSP-5) - Microline 390/391-Plus
229
A.2.08 Interconnect Board (SRBS)
230
RS232-C Serial Interface (LXHI)
231
B Illustrated Parts Listing
233
Illustrated Parts Listing - General Information
233
Definitions of Terms
234
B.1.02 Definitions of Terms
234
B.1.03 Compatibility - Microline 390/391 Vs. Microline
236
390/391-Plus
238
Parts Ordering Information
240
Covers
241
Electrical Components - Rev a and B
241
Electrical Components - Rev C
241
Printer Mechanism - Rev a and B (1 of 2)
241
Printer Mechanism - Rev a and B (2 of 2)
241
Printer Mechanism - Rev C (1 of 2)
241
Printer Mechanism - Rev C (2 of 2)
241
B.2.01 Covers
242
B.2.02 Electrical Components - Rev a and B
244
B.2.03 Electrical Components - Rev C
247
B.2.04 Printer Mechanism - Rev a and B (1 of 2)
251
B.2.05 Printer Mechanism - Rev a and B (2 of 2)
254
B.2.06 Printer Mechanism - Rev C (1 of 2)
257
B.2.07 Printer Mechanism - Rev C (2 of 2)
260
B.2.08 Operator Panel
263
B.2.09 Carriage Assembly
266
Operator Panel
267
B.2.10 Tractor Assembly
268
Options
270
B.2.11 Options
270
Consumables
272
B.2.12 Consumables
272
Packaging
274
B.2.13 Packaging
274
Documentation
276
B.2.14 Documentation
276
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Oki ML390 Specifications
General
Type
Dot Matrix Printer
Interface
Parallel, Serial
Emulation
IBM Proprinter
Paper Handling
Continuous forms
Noise Level
55 dB
Number of Pins
24-pin
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