Ricoh C231 Service Manual page 12

2.2.3 BINARY PROCESSING................................................................. 2-13
Data Compensation Processing......................................................... 2-13
MTF Correction .................................................................................. 2-14
Binary Processing in Letter/Photo Mode ............................................ 2-14
Error Diffusion .................................................................................... 2-15
2.2.4 MAIN SCAN MAGNIFICATION...................................................... 2-16
2.2.5 IMAGE POSITION ADJUSTMENT IN THE MAIN
SCAN DIRECTION ........................................................................ 2-17
2.2.6 PASTE SHADOW ERASE MODE ................................................. 2-17
2.2.7 THERMAL HEAD........................................................................... 2-18
Specifications ..................................................................................... 2-18
Thermal Head Control........................................................................ 2-18
Thermal Head Protection ................................................................... 2-18
Remarks for Handling the Thermal Head........................................... 2-19
2.3 MASTER EJECT .................................................................................... 2-20
2.3.1 OVERALL ...................................................................................... 2-20
2.3.2 MASTER CLAMPER OPEN MECHANISM.................................... 2-21
Drum Position Lock Mechanism......................................................... 2-21
2.3.3 MASTER EJECT ROLLER MECHANISM ..................................... 2-22
2.3.4 PRESSURE PLATE MECHANISM ................................................ 2-23
2.4 MASTER FEED ...................................................................................... 2-24
2.4.1 OVERALL ...................................................................................... 2-24
2.4.2 MASTER FEED MECHANISM....................................................... 2-25
2.4.3 MASTER CLAMPER OPERATION AND TENSION ROLLER
RELEASE MECHANISM ............................................................... 2-26
2.4.4 CUTTER MECHANISM ................................................................. 2-27
2.5 DRUM ..................................................................................................... 2-28
2.5.1 OVERALL ...................................................................................... 2-28
2.5.2 DRUM DRIVE MECHANISM ......................................................... 2-29
2.5.3 INK SUPPLY MECHANISM ........................................................... 2-30
2.5.4 INK ROLLER MECHANISM........................................................... 2-31
2.5.5 INK SUPPLY CONTROL ............................................................... 2-32
2.5.6 DETECTION OF MASTERS ON THE DRUM................................ 2-33
2.6 PAPER FEED ......................................................................................... 2-34
2.6.1 OVERALL ...................................................................................... 2-34
2.6.2 PAPER FEED MECHANISM ......................................................... 2-35
2.6.3 PAPER FEED/SEPARATION PRESSURE ADJUSTMENT
MECHANISM................................................................................. 2-36
2.6.4 REGISTRATION ROLLER MECHANISM...................................... 2-37
Registration Roller Drive .................................................................... 2-37
Registration Roller Up/Down Mechanism........................................... 2-38
2.6.5 PRINTING PRESSURE MECHANISM .......................................... 2-39
2.6.6 PAPER TABLE MECHANISM........................................................ 2-40
Table Up and Down Mechanism ........................................................ 2-40
Paper End Detection Mechanism....................................................... 2-40
Paper Table Side Fence Mechanism ................................................. 2-41
Paper Table Side-to-Side Shift Mechanism ....................................... 2-41
Side Fence Friction Pads ................................................................... 2-42
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SM