Troubleshooting Guide; Blank Print; All-Black Print - Ricoh G104 Service Manual

4.3 TROUBLESHOOTING GUIDE

NOTE: When replacing the engine control board, remove the NVRAM from the
original engine control board and install it on the new one.
SYMPTOM

4.3.1 BLANK PRINT

Symptom
No image is printed.

4.3.2 ALL-BLACK PRINT

Symptom
All the paper is black.
SM
CÓPIA NÃO CONTROLADA
Possible cause
Defective LDU
Defective PCU
Defective transfer belt unit
Incorrect action of transfer
roller
Defective high voltage
supply board
Defective engine board
(EGB)
Possible cause
Incorrectly installed PCU
Defective PCU
Defective high voltage supply
board
Defective LDU
Defective engine board
(EGB)
Defective main board
4-21
CÓPIA NÃO CONTROLADA
TROUBLESHOOTING GUIDE
Necessary actions
Replace the LDU.
Replace the PCU.
Replace the transfer belt
unit.
Check the guide and the
transfer roller.
Replace high voltage supply
board 1 or 2.
Replace the engine board
(EGB).
Necessary actions
Install the PCU correctly.
Replace the PCU.
Replace high voltage supply
board 1 or 2 .
Replace the LDU.
Replace the engine board
(EGB).
Replace the main board.
G104