Ricoh FT8680 Service Manual page 375

31 July 1995
SC401 - Transfer Corona Leakage
Definition:
The transfer corona power pack detects the transfer corona leakage and
sends the leak signal to the main PCB for more than 3 seconds.
NOTE: DC power, 24 V (VP) and 38 V (VFL), will be cut at the same
time.
Points to check:
•
Transfer corona unit
•
Transfer corona power pack
•
Interface PCB
SC402 - PTC Current Adjustment Error
Definition:
When process control data initialization is selected in the SP mode, the main
PCB cannot adjust the PTC current to its target value.
NOTE: After resetting the system error condition, the adjustment will be
tried again. Even if the second execution fails, no service call
condition is displayed and the copier uses previous reference
data until its next initialization.
Points to check:
•
PTC unit
•
PTC power pack
•
Drum
•
Drum current detection PCB
SC403 - PTC Leakage
Definition:
The PTC power pack detects the PTC corona leakage and sends the leak
signal to the main PCB for more than 3 seconds.
NOTE: DC power, 24 V (VP) and 38 V (VFL), will be cut at the same
time.
Points to check:
•
PTC unit
•
PTC power pack
•
Interface PCB
SYSTEM ERROR AND SERVICE CALL CONDITIONS
6-13