Ricoh D127 Field Service Manual page 164

6. Troubleshooting
No.
Definition
LD error
240 D
Detecting two LD error flags in series
when LD lighting after the LD initializing
GAVE communication error
Doesn't the value you set in a certain
270 B
resister accord with the value of the
same resister on reading.
High-voltage charge error
The maximum rate of PWM duty (50%)
302 B
occurs ten times in series (20msec x 10)
This error doesn't happen when the front
door (the inter lock) opens.
P sensor error
SC350~354 happen on normal
355 D
operation. This error isn't displayed on
panel but left on the history as a logging
data.
162
Symptom
SC302
RTB 38: Corrected
Possible Cause
• Characteristic degradation of the LD
(LD broken, electric current versus
light output characteristic shift, etc)
• Bad connection or disconnection of
the harness to the LD
• Defective the LD driver parts
• Defective the BICU
• Defective the GAVD, the CPU
• Defective the MD
• Defective harness connected to the
HVP
• Disconnection of the harness to P
sensor
• Bad electrical contact of P sensor
CN
• Defective the BICU
• Defective the writing section
• Defective developer density
• Defective high-voltage PP
• Uncleanness of the P sensor
• Defective the P sensor