Ricoh G031 Service Manual page 179

SC322: Laser Synchronization Error
Definition:
The laser synchronization signal cannot be detected by the main scan
synchronization detector board for more than 4 consecutive 100 ms intervals.
Possible Causes:
• Laser synchronization detector out of position
• Laser synchronization detector defective
• Engine control board defective
SC500: Main Motor Error
Definition:
A main motor lock signal is detected for more than 1 second or the lock signal
is not detected for more than 500 ms during rotation.
Possible Causes:
• Too much load on the drive mechanism
• Main motor defective
SC542: Fusing Temperature Warm-up Error
Definition:
The fusing temperature does not reach 80°C within 60 seconds after the main
switch is turned on or after the covers have been closed. Or, during warming-
up, the fusing temperature does not change by at least 3°C within 5 seconds.
Possible Causes:
• Fusing thermistor defective or out of position
• Fusing lamp open
• Fusing thermofuse open
• Power supply unit defective
• Poor fusing unit connection
• Engine control board defective
SC543: Fusing High Temperature Error
Definition:
A fusing temperature of over 230°C is detected for 1 second by the fusing
thermistor.
Possible Causes
• Fusing thermistor defective
• Power supply unit defective
SM
PRINTER ENGINE SC CODES
7-7 G031/G032