Ricoh D131 Service Manual page 489

SC300: Image Development 1
C
SC380-51
-
SC396-01 D
D131/D132/D133
Potential sensor calibration (VL)
During drum potential sensor calibration, when VL is adjusted, the
pattern surface potential VL pattern is not within range 0V to -400V.
(VL is the potential after exposing a white pattern.)

Potential sensor defective

Potential sensor harness disconnected

Potential sensor connector defective or disconnected

IOB defective

OPC connector defective

Charge corona power pack defective

Development power pack defective
Main motor error
The main motor lock signal remains low for 2 seconds while the main
motor is on.

Drive mechanism overloaded

Motor driver board defective
2-22 SM Appendix