Ricoh D127 Field Service Manual page 166

6. Troubleshooting
No.
Definition
Transfer roller leak error (positive electrode)
401 B
This error doesn't happen when the front
door (the inter lock) opens.
Transfer roller leak error (negative electrode)
The feedback voltage of the transfer
roller has been more than the certain
402 B
voltage (more than 4.5V) for 200msec.
This error doesn't happen when the front
door (the inter lock) opens.
Separation high-voltage error
The maximum rate of PWM duty (50%)
411 B
occurs ten times in series (20msec x 10)
This error doesn't happen when the front
door (the inter lock) opens.
Transfer electric plus current error
Detecting "0" (Abnormal) ten times in
series (200ms) while monitoring "HVP: T
440 B
+: Output error detection signal" every
20m seconds.
(Reboot the machine to clear this SC)
164
Symptom
• The feedback voltage of the
transfer roller has been more than
the certain voltage for 200msec.
(Open detecting condition)
• The feedback voltage of the
transfer roller has been insufficient
for 200msec. (Leak detecting
condition)
Possible Cause
SC401
RTB 38: Corrected
• Defective harness connected to HVP
• Defective the MD
SC402
RTB 38: Corrected
• Defective the MD
• Defective harness connected to the
HVP
SC411
RTB 38: Corrected
• Defective the MD, HVP Connection
harness.