Table of Contents
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1. Outline ......................................................................................................... 7-1
1.1
Circuit Connection Diagram ........................................................................... 7-1
1.2
Block Diagram ................................................................................................ 7-7
1.3
PBA Major Device Diagrams .......................................................................... 7-8
1.4
Power Supply Table ........................................................................................ 7-10
2. Flow of Image Signals ................................................................................ 7-11
2.1
Facsimile Transmission .................................................................................. 7-11
2.2
Facsimile Reception ....................................................................................... 7-13
2.3
Copy ............................................................................................................... 7-14
2.4
PC Interface ................................................................................................... 7-16
2.5
PCL Print ........................................................................................................ 7-22
2.6
Network Interface ........................................................................................... 7-23
3. MAIN PBA .................................................................................................... 7-26
3.1
Memory Circuit ............................................................................................... 7-28
3.2
Scanning Control Circuit ................................................................................. 7-31
3.3
LSU Drive Circuit ............................................................................................ 7-32
3.4
Fuser Control Circuit ...................................................................................... 7-34
3.5
Reset Circuit ................................................................................................... 7-35
3.6
Super Power Save Circuit .............................................................................. 7-36
3.7
Toner Empty Detect Circuit ............................................................................. 7-40
3.8
Drum Unit Detect Circuit ................................................................................. 7-41
3.9
Main Motor Drive Circuit ................................................................................. 7-42
3.10 TX Motor Drive Circuit .................................................................................... 7-43
3.11 MG Motor Drive Circuit ................................................................................... 7-44
3.12 Fan Motor Drive Circuit .................................................................................. 7-45
3.13 Document Detect Circuit ................................................................................ 7-46
3.14 Paper Empty Detect Circuit ............................................................................ 7-47
3.15 Paper Size Detect Circuit ............................................................................... 7-48
3.16 Paper Jam Detect Circuit ............................................................................... 7-49
3.17 Paper Pickup Solenoid Drive Circuit .............................................................. 7-50
3.18 Scanner Cover Open Detect Circuit ............................................................... 7-51
3.19 Top Cover Open Detect Circuit ....................................................................... 7-52
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