Ricoh G104, Service Manual

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G160/G161 ii SM
4.3.16 BACKGROUND STAIN............................................................ 4-36
4.3.17 NO PRINTING ON PAPER EDGE........................................... 4-37
4.3.18 IMAGE NOT CENTERED WHEN IT SHOULD BE .................. 4-37
4.4 ELECTRICAL COMPONENT DEFECTS ............................................ 4-38
4.4.1 SENSORS ................................................................................. 4-38
4.5 BLOWN FUSE CONDITIONS............................................................. 4-42
4.5.1 POWER SUPPLY UNIT ............................................................. 4-42
4.5.2 IOB............................................................................................. 4-42
4.6 LEDS................................................................................................... 4-43
4.6.1 CONTROLLER .......................................................................... 4-43
5. SERVICE TABLES .................................................................. 5-1
5.1 SERVICE PROGRAM MODE ............................................................... 5-1
5.1.1 SERVICE MODE OPERATION ................................................... 5-1
5.1.2 REMARKS ................................................................................... 5-2
5.1.3 BIT SWITCH PROGRAMMING ................................................... 5-4
5.2 SERVICE MODE TABLE ...................................................................... 5-6
5.2.1 CONTROLLER SERVICE MODE ................................................ 5-6
5.2.2 ENGINE SERVICE MODE......................................................... 5-10
5.2.3 INPUT CHECK TABLE ............................................................ 5-159
5.2.4 OUTPUT CHECK TABLE ........................................................ 5-162
5.3 FIRMWARE UPDATE ....................................................................... 5-165
5.3.1 TYPES OF FIRMWARE........................................................... 5-165
5.3.2 PRECAUTIONS ....................................................................... 5-165
5.4 SD CARD APPLICATION MOVE...................................................... 5-166
5.4.1 OVERVIEW.............................................................................. 5-166
5.4.2 MOVE EXEC............................................................................ 5-166
5.4.3 UNDO EXEC............................................................................ 5-167
5.4.4 KEEPING THE SD CARD........................................................ 5-168
6. DETAILED SECTION DESCRIPTIONS................................... 6-1
6.1 BEFORE YOU BEGIN .......................................................................... 6-1
6.2 OVERVIEW........................................................................................... 6-2
6.2.1 COMPONENT LAYOUT .............................................................. 6-2
6.2.2 BOARD STRUCTURE ................................................................. 6-3
6.3 PROCESS CONTROL .......................................................................... 6-6
6.3.1 OVERVIEW.................................................................................. 6-6
6.3.2 POTENTIAL CONTROL............................................................... 6-6
6.3.3 TONER SUPPLY CONTROL....................................................... 6-9
6.3.4 TONER NEAR END/TONER END DETECTION ....................... 6-11
6.3.5 DEVELOPER INITIALIZATION.................................................. 6-12
6.4 PAPER FEED ..................................................................................... 6-13
6.4.1 BY-PASS TRAY FEED AND SIZE DETECTION ....................... 6-13
6.5 LASER EXPOSURE ........................................................................... 6-14
6.5.1 LD SAFETY SWITCH ................................................................ 6-14
6.5.2 AUTOMATIC LINE POSITION ADJUSTMENT.......................... 6-15
6.6 FUSING .............................................................................................. 6-19
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA