Ricoh C231 Service Manual page 14

4. Ink Roller Unit................................................................................... 4-2
5. Ink Pump .......................................................................................... 4-2
4.1.4 PAPER DELIVERY SECTION ......................................................... 4-3
1. Exit Pawl .......................................................................................... 4-3
4.1.5 ELECTRICAL COMPONENTS ........................................................ 4-3
1. Main Processing Unit (MPU) 1 ......................................................... 4-3
2. Main Processing Unit (MPU) 2 ......................................................... 4-3
3. Power Supply Unit............................................................................ 4-3
4. Sensor Adjustments ......................................................................... 4-3
4.2 DIP SW, LED, VR, TP, AND FUSE TABLES............................................ 4-4
4.2.1 TEST POINTS ................................................................................. 4-4
MPU ..................................................................................................... 4-4
4.2.2 POTENTIOMETERS........................................................................ 4-4
MPU ..................................................................................................... 4-4
Power Supply Unit................................................................................ 4-4
4.2.3 LED'S............................................................................................... 4-4
4.2.4 FUSES ............................................................................................. 4-5
MPU ..................................................................................................... 4-5
PSU...................................................................................................... 4-5
4.3 SERVICE CALL CODES .......................................................................... 4-6
4.4 SERVICE PROGRAM MODE................................................................... 4-8
4.4.1 ACCESS PROCEDURE .................................................................. 4-8
Service Program Mode Access Procedure (For Engineers)................. 4-8
Service Program Mode Access Procedure (For Users) ....................... 4-9
Change Adjustment Values or Modes................................................ 4-10
4.4.2 SERVICE PROGRAM TABLE ....................................................... 4-11
Remarks............................................................................................. 4-20
4.4.3 INPUT/OUTPUT CHECK MODE ................................................... 4-23
Input/Output Check Mode Access Procedure .................................... 4-23
Input Check Table .............................................................................. 4-24
Output Check Table ........................................................................... 4-26
4.5 TEST PATTERN IMAGE MODE............................................................. 4-28
4.6 USER CODE MODE............................................................................... 4-29
PREVENTIVE MAINTENANCE ........................................................ 5-1
5.1 MAINTENANCE TABLE ........................................................................... 5-1
REPLACEMENT AND ADJUSTMENT............................................. 6-1
6.1 EXTERIOR COVER REMOVAL ............................................................... 6-1
6.1.1 ADF.................................................................................................. 6-1
6.1.2 OPERATION PANEL ....................................................................... 6-2
6.1.3 PLATEN COVER AND UPPER COVERS ....................................... 6-3
6.1.4 TOP COVER AND EXPOSURE GLASS ......................................... 6-3
6.1.5 OTHER COVERS ............................................................................ 6-4
C231
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