Sc3Xx: Image Processing - Ricoh D158 Service Manual

Service Call Conditions

SC3xx: Image Processing

No.
Definition
Charge roller current leak
302 B
A current leak signal for the
charge roller is detected.
Polygonal mirror motor error
The polygon mirror motor
does not reach operating
speed within 10 seconds after
320 B
the motor ON signal is sent,
or does not turn on within one
of the 200 ms check intervals
during operation.
No laser writing signal (F-GATE) error
The laser-writing signal
(F-GATE) fails to turn Low
321 C
after the laser crosses 5 mm
on the drum surface from the
laser writing start position.
Laser synchronization error
The main scan
synchronization detector
322 B
board cannot detect the laser
synchronization signal for
more than 5 consecutive 100
ms intervals.
D158/D159/D160/D161/D170
Symptom
5-12
Possible Cause

Charge roller damaged

High voltage supply board

Poor connection of the PCU

Polygon mirror motor

Poor connection between the
polygonal mirror motor driver and the
BICU board

Damaged cable between BICU and
polygonal mirror motor driver

BICU board

BICU board

The fax controller or printer controller
has a poor connection

Fax controller or printer controller

Poor connection between the laser
unit and the BICU board

Damaged cable between BICU and
laser unit

Laser unit

BICU board
SM