Ricoh Aficio SP C440DN Field Service Manual page 19

Bridge Board............................................................................................................................................. 233
PSU............................................................................................................................................................. 234
Controller Box............................................................................................................................................235
BCU............................................................................................................................................................ 238
When installing the new BCU..........................................................................................................239
Removing the BCU with bracket......................................................................................................240
HVPS: T1T2 Board.................................................................................................................................... 241
HVPS: CB Board........................................................................................................................................242
DC Switch Board.......................................................................................................................................244
NVRAM Replacement Procedure............................................................................................................ 245
NVRAM on the BCU........................................................................................................................ 245
NVRAM on the Controller................................................................................................................246
Adjustments.................................................................................................................................................... 248
Gamma Adjustment...................................................................................................................................248
Summary............................................................................................................................................248
Adjustment Procedure.......................................................................................................................250
5. System Maintenance Reference
Service Program Mode................................................................................................................................. 253
Service Mode Operation......................................................................................................................... 253
Accessing the Required Program.................................................................................................... 253
Inputting a Value or Setting for a Service Program....................................................................... 253
Exiting Service Mode....................................................................................................................... 253
Remarks......................................................................................................................................................254
Display on the Control Panel Screen.............................................................................................. 254
Bit Switch Programming............................................................................................................................ 256
Service SP Mode Tables............................................................................................................................... 258
SP1-XXX (Service Mode)..........................................................................................................................258
Engine SP Mode Tables: SP1000................................................................................................................271
SP1-XXX (Feed)......................................................................................................................................... 271
Engine SP Mode Tables - SP2000...............................................................................................................297
SP2-XXX (Drum).........................................................................................................................................297
Engine SP Mode Tables - SP3000...............................................................................................................397
SP3-XXX (Process)..................................................................................................................................... 397
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