Service manual

SC Tables
SM 6-9 D127/D128
Trouble –
shooting
No.
Definition
Symptom Possible Cause
402 B
Transfer roller leak error (negative electrode)
The feedback voltage of the
transfer roller has been more than
the certain voltage (more than
4.5V) for 200msec.
This error doesn’t happen when the
front door (the inter lock) opens.
 Defective the MD
 Defective harness connected to
the HVP
411 B
Separation high-voltage error
The maximum rate of PWM duty
(50%) occurs ten times in series
(20msec x 10) This error doesn’t
happen when the front door (the
inter lock) opens.
 Defective the MD, HVP
Connection harness.
440 B
Transfer electric plus current error
Detecting "0" (Abnormal) ten times
in series (200ms) while monitoring
"HVP: T+: Output error detection
signal" every 20m seconds.
(Reboot the machine to clear this
SC)
460 B
Isolation voltage error
Detecting "0" (Abnormal) ten times
in series (200ms) while monitoring
"HVP: D: Output error detection
signal" every 20m seconds.
(Reboot the machine to clear this
SC)