Service manual

SC Tables
D127/D128 6-8 SM
No.
Definition
Symptom Possible Cause
391 B
Development bias error
The maximum rate of PWM duty
(50%) occurs 10 times in series
(20msec x 10)
This error doesn’t happen when the
front door (the inter lock) opens.
 Defective the MD
 Defective harness connected to
the HVP
392 B
Developer initialization error
The P sensor does not detect a
correct pattern during developer
initialization (SP2-801-001).
When Vsp output is more than
2.5V, SC appears in the case of not
removing the heat seal or an
absence of developer.
 Defective P sensor
 Defective T sensor
 NOT removing heat-seal
 Defective drum operation
 Defective development roller
operation
401 B
Transfer roller leak error (positive electrode)
 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)
This error doesn’t happen when the
front door (the inter lock) opens.
 Defective harness connected to
HVP
 Defective the MD