Sc Code Descriptions - Ricoh G092 Service Manual

SERVICE CALL CONDITIONS

4.1.2 SC CODE DESCRIPTIONS

NOTE: When replacing the engine control board, remove the EEPROM from the
original engine control board and install it on the new one.
SC
Symptom
201 Polygon motor error
After the main switch turns
on, the polygon motor is not
phase-locked in several
seconds.
230 V-Sync error
Subscan signals are not
asserted.
302 Charge or transfer bias error
Charge bias in out of the
normal range.
440 PCU BK motor error
The drive motor of the black
PCU is not locked.
441 PCU (CMY) motor error
The drive motor of the CMY
PCU is not locked.
G081/G092
Possible Cause/Required Action
• Incorrect cable connection
• Defective engine control board
1. Connect the cable correctly.
2. Replace the engine control board.
3. Replace the laser scanning unit.
4. Check or replace the cable.
See SC201.
• Defective PCU charge terminal
• Defective transfer belt unit bias terminal
• Defective terminal springs on bias terminal unit
• Incorrect cable connection between high voltage
supply and engine control board
• Defective high voltage board
1. Replace the PCU.
2. Replace the transfer belt unit.
3. Replace the bias terminal unit.
4. Connect the cable correctly.
5. Replace the high voltage board.
• Defective gear
• Defective gear on transfer belt unit
• Voltage between pins 1 and 13 (CN12 on engine
control board) abnormal (not +24V), or pin 11
(CN12 on engine control board) unable to send
motor clock
• Defective black PCU drive motor
1. Replace the black PCU.
2. Replace the transfer belt unit.
3. Replace the engine control board.
4. Replace the main drive unit assembly.
• Defective gear
• Voltage between pins 2 and 14 (CN12 on engine
control board) abnormal (not +24V), or pin 12
(CN12 on engine control board) unable to send
motor clock
• Defective CMY PCU drive motor
1. Replace the CMY PCU.
2. Replace the engine control board.
3. Replace the main drive unit assembly.
4-2 SM