Ricoh MP C6502SP Field Service Manual page 34

Main Boards / HDD Unit..............................................................................................................................926
Layout......................................................................................................................................................... 926
Controller Board........................................................................................................................................927
When installing the New Controller Board.................................................................................... 929
HDD Unit.................................................................................................................................................... 930
After Installing the New HDD Unit.................................................................................................. 931
Disposal of HDD Unit....................................................................................................................... 931
Reinstallation..................................................................................................................................... 931
BCU............................................................................................................................................................ 932
NVRAM Replacement Procedure............................................................................................................ 933
NVRAM on the Controller Board.................................................................................................... 933
NVRAM (EEPROM) on the BCU..................................................................................................... 937
IPU.............................................................................................................................................................. 938
IOB............................................................................................................................................................. 939
When removing the motors that are behind the IOB.....................................................................940
PFB.............................................................................................................................................................. 940
When removing the motors that are behind the PFB......................................................................941
IH Inverter.................................................................................................................................................. 941
AC Drive Board......................................................................................................................................... 942
Notes on Replacing the AC Drive Board........................................................................................942
PSU1 / PSU2............................................................................................................................................ 943
When removing the motors and sensors that are behind the PSU1/PSU2.................................944
Potential Sensor Board..............................................................................................................................946
Combined High-Voltage Power Supply Board (Charge / Development) (KCMY)............................947
Combined High-Voltage Power Supply Board (KC).....................................................................947
Combined High-Voltage Power Supply Board (MY).................................................................... 948
Fusing Web Control Board-Main Machine (D137/D138 only)......................................................... 949
AC Drive Board Relay (D137/D138 only)............................................................................................949
Motors and Sensors.......................................................................................................................................950
Layout (Motor)...........................................................................................................................................950
Rear of the Machine (Top)...............................................................................................................950
Rear of the Machine (Middle)......................................................................................................... 951
Rear of the Machine (Bottom)..........................................................................................................952
32