Table of Contents Page
4.1 Overview - Introduction 78
....4.1.02 Compatibility - Microline 390/391 vs. Microline
390/391-Plus
79
4.2 Troubleshooting Updates 80
4.3 Reporting Problems 81
4.4 Troubleshooting Tips 82
4.5 Fault Alarms 83
4.6 Repair Analysis Procedures - Using The RAPS 84
....4.6.02 RAP Index 85
....4.6.03 Troubleshooting Cautions 86
........RAP 01: Operator Panel Lamps Do Not Light 87
........RAP 02: Abnormal Spacing 88
........RAP 03: Wrong or Missing Characters / Dots on Output 89
........RAP 04: Line Feed Problems 90
........RAP 05: Malfunction of Operator Panel Switch(es) 91
........RAP 06: Parallel Interface Does Not Receive Data 92
........RAP 07: Serial Interface Does Not Receive Data 93
4.7 Hexadecimal Dump 94
4.8 Resistance / Service Checks - Index To Charts 95
....4.8.02 Interconnect Diagrams - Microline 390/391 - Rev. A
and B
96
........Interconnect Diagrams - Microline 390/391 - Rev C 97
........Interconnect Diagrams - Microline 390/391 - Plus 98
....4.8.03 Printhead 99
....4.8.04 Space Motor 100
....4.8.05 Line Feed Motor 101
....4.8.06 Operator Panel Board 102
....4.8.07 Control Board 103
4.9 Printer Tests - General Information 104
....4.9.02 Rolling ASCII Print Test 105
....4.9.03 Font Sample Test 106
....4.9.04 Serial Interface Loopback Test 107
4.10 Menu Operation 108
4.11 Top Of Form 109
4.12 Paper Park 110
4.13 Forms Tear Off 111
A Board Diagrams
A.1 Board Reference Charts - General Information 112
....A.1.02 Compatibility - Microline 390/391 vs. Microline
390/391-Plus
113
A.2 Index To Charts - Microline 390/391: Rev A And B 114
....Index To Charts - Microline 390/391: Rev C 115
....Index To Charts - Microline 390/391 - Plus 116
....A.2.01 Control Board (SKRB) - Rev A and B 117