Oki ML520 - Manual (Page 5)

Table of Contents Page
....4.4.04 Tips for Preventing Image Problems 123
....4.4.05 Common Problems 124
4.5 Abnormal Output - Output Samples 125
....Left Margin Drifting Problem 126
4.6 Fault Alarms 127
....4.6.02 ALARM/LED Display Troubleshooting Table Index 128
....4.6.03 ALARM/LED Display Troubleshooting Tables 129
4.7 Repair Analysis Procedures (Raps) 130
....4.7.02 RAP Index 131
........RAP 01 No Power Supplied to Printer 132
........RAP 02 No Spacing Operation 133
........RAP 03 Printhead Homing Error 134
........RAP 04 Paper Jam During Paper Loading 135
........RAP 05 Printhead Pins Not Firing 136
........RAP 06 Poor Print Quality 137
........RAP 07 Ribbon Feed Problem 138
........RAP 08 Line Feed Problem 139
........RAP 09 Operation Panel Malfunction 140
........RAP 10 Parallel Interface Problem 141
........RAP 11 Serial Interface Problem 142
4.8 Printer Tests 143
....4.8.02 Rolling ASCII Test 144
....4.8.03 Font Test 145
....4.8.04 Serial Interface Loopback Test 146
........Serial Cable Information 147
........Serial Interface Signal Requirements 148
........Commonly Used Serial Cable Configurations 149
....4.8.05 Hexadecimal Dump Mode 150
4.9 Resistance Checks 151
........Layout Diagram 152
....4.9.02 Printhead 153
....4.9.03 Line Feed Motor Resistance 154
....4.9.04 Space Motor Resistance 155
A Reference Charts
A.1 Overview - A.1.01 General Information 156
A.2 Index To Charts 157
........Board Layout 158
....A.2.01 Main Controller Board (FJIM) 159
....A.2.02 Operator Panel Board (LEOP) 160
....A.2.03 Power Supply Assembly 161
....A.2.04 Space Motor Board 162
....A.2.05 RS232-C Serial Interface Board - Option (LXHI) 163
B Illustrated Parts Listing
B.1 Overview - B.1.01 General Information 164