Ricoh D131 - Page 488

SC300: Image Development 1
SM Appendix 2-21 D131/D132/D133
Appendix:
Service Call
Conditions
SC380-31
C
Potential sensor calibration error (cut off)
During drum potential sensor calibration, the drum potential sensor
output voltage did not meet specification when test voltages
(–100V, –800V) are applied to the drum.
-
 Potential sensor defective
 Potential sensor harness disconnected
 Potential sensor connector defective or disconnected
 IOB defective
 OPC connector defective
 Development power pack defective
SC380-41
C
Potential sensor calibration error (VD)
During drum potential sensor calibration when adjusting the drum
potential (VD), the drum potential sensor detects VD higher than
VG (grid voltage).
-or-
When adjusting VD (drum surface potential of black areas after
exposure), even after 5 adjustments of VG (charge corona grid
potential), VD could not be set in the target range (–800±20+ VL +
130V)
-
 Potential sensor defective
 Potential sensor harness disconnected
 Potential sensor connector defective or disconnected
 IOB defective
 OPC connector defective
 Development power pack defective
 Charge corona unit worn out, dirty