Ricoh FACSIMILE FAX77 - Page 4

SECTION 5. TROUBLESHOOTING
5-1. QuaIity Checks . . . . . . . . . . . 5-1
1. Copy Quality . . . . . . . . . . . . 5-1
1. Copy Density . . . . . . . . . . . 5-2
2. Skew . . . . . . . . . . . . . . 5-2
3. Intelligibility . . . . . . . . . . . . 5-2
4. Copy Test . . . . . . . . . . . . 5-2
2. Operation Panel Display . . . . . . . . 5-3
3. Sensor Initialization . . . . . . . . . . 5-3
4. Mechanism Test . . . . . . . . . . . 5-3
5. Communication Tests . . . . . . . . . 5-3
5-2. Copy Quality Troubleshooting . . . . . 5-4
1. Received Copies . . . . . . . . . . . 5-4
2. Copies made in Copy Mode . . . . . . 5-4
3. Effects of line problems on copy quality . . 5-6
5-3. Machine Operation . . . . . . . . . 5-7
1. ADF/Scanner . . . . . . . . . . . . 5-7
2. Printer . . . . . . . . . . . . . . 5-10
5-4. Error Codes . . . . . . . . . . . . 5-14
5-5. Defective Sensor Table . . . . . . . . 5-25
5-6. Timing Charts . . . . . . . . . . . 5-26
1. Scanner . . . . . . . . . . . . . . 5-26
2. Printer . . . . . . . . . . . . . . . 5-27
SECTION 6. RICOH MEMORY OPTION
TYPE 85
7-1. Point-to-point Diagram . . . . . . . . 7-1
7-2. Signal Tables . . . . . . . . . . . . 7-2
1. FCU . . . . . . . . . . . . . . . . 7-2
2. SRAM . . . . . . . . . . . . . . . 7-6
3. SBU . . . . . . . . . . . . . . . . 7-6
4. NCU . . . . . . . . . . . . . . . . 7-7
6. Xenon Lamp Driver . . . . . . . . . . 7-8
7. PSU . . . . . . . . . . . . . . . . 7-8
7-3. Block Diagrams . . . . . . . . . . . 7-9
1. Overall Machine Control . . . . . . . . 7-9
2. Video Data Path . . . . . . . . . . . 7-10
3. Power Distribution . . . . . . . . . . . 7-13
4. Scanner Drive . . . . . . . . . . . . 7-14
5. Printer Drive . . . . . . . . . . . . . 7-15
7-4. Electrical Component Layout . . . . . . 7-16
Appendix A. Glossary
6-1. Installation Procedure . . . . . . . . 6-1
1. Preparation . . . . . . . . . . . . . 6-1
2. Installing the Memory . . . . . . . . . 6-1