Ricoh D093 - Charge Corona Output Error; Gray Balance Adjustment Error; Sc300

Service Call Tables
SM 7-17 D093/D094
Trouble-
Shooting
186 B Gray Balance Adjustment Error
The value for gray balance was detected out of range after gray
adjustment.
If cycling the machine power off/on does not solve the problem:
 Clean the platen white plate
 Clean the exposure glass
 CIS-SIF harnesses loose, broken, defective
 SIF-SIPU harnesses loose, broken, defective
 SIF defective
 CIS defective
 SIPU defective
7.3.2 SC200
There are no Group 2 SC codes for this machine
7.3.3 SC300
Group 3 SC codes are related to image making.
300 D Charge Corona Output Error
After sampling at 10 ms intervals, the charge-corona feedback voltage
remained less than 0.5 V for more than 200 ms.
 Charge corona unit leakage
 High voltage cable defective
 Corona wire dirty or broken
 CGB power pack fuse, connections loose, broken, or defective