Ricoh D127 Service Manual page 174

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