Ricoh FT8680 Service Manual page 372

SYSTEM ERROR AND SERVICE CALL CONDITIONS
SC307 - Vd Correction Error
Definition:
During process control data initialization, the target Vd value cannot be
achieved within the charge power pack output range.
NOTE: After resetting the system error condition, Vd correction 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:
•
Drum
•
Vd pattern
•
Charge corona
•
Charge corona power pack
•
Drum potential sensor
•
FU3 on the power supply unit (dc 24 V: VP)
SC352 - Vsp Abnormal
Definition:
The main PCB detects a high Vsp value (1.4 V) five times in a row.
NOTE: Toner supply shifts to 7% fixed toner supply mode. If the Vsp
returns to normal level, standard detect supply resumes. No
service call condition is displayed.
Points to check:
•
ID sensor
•
Toner supply mechanism
•
Toner near end sensor
•
Drum
•
Developer
•
Development bias
•
Charge corona
6-10
31 July 1995