Ricoh LD013, Service Manual

Page: 129 / 513

T
rouble
-
s
hooting
SERVICE CALL CONDITIONS
SM 4-3 B039/B040/B043
No.
Definition
Symptom Possible Cause
Communication Error between BiCU and SBU 130 B
The BiCU board cannot detect the SBU
connect signal.
•
The flat cable between the BiCU
board and the SBU has a poor
connection
•
The flat cable between the BiCU
board and the SBU damaged
•
BiCU board defective
•
SBU defective
Automatic SBU adjustment error 192 B
During the automatic SBU adjustment,
the machine detects that the white level
read from the white plate or paper is
out of range. (
☛
SP4-908)
•
Exposure lamp defective
•
SBU auto adjustment was not done
correctly (
☛
3.13 Copy adjustment
printing/scanning – Standard white
density adjustment)
•
SBU defective
•
BiCU board defective
•
Exposure lamp stabilizer defective
SBU White Level Detection Error 194 B
The automatic SBU adjustment failed
twenty times consecutively.
•
Exposure lamp defective
•
Dirty white plate
•
Incorrect position or width of white
plate scanning (
☛
SP4-015)
•
BiCU board defective
•
SBU board defective
Charge roller current leak 302 B
A current leak signal for the charge
roller is detected.
•
Charge roller damaged
•
High voltage supply board defective
•
Poor connection of the PCU
Polygonal mirror motor error 320 B
The polygon mirror motor does not
reach operating speed within 10
seconds after the motor ON signal is
sent, or does not turn on within one of
the 200 ms check intervals during
operation.
•
Polygon mirror motor defective
•
Poor connection between the
polygonal mirror motor driver and the
BiCU board
•
Damaged cable between BiCU/IOB
and polygonal mirror motor driver
•
BiCU board defective
No laser writing signal (F-GATE) error 321 B
The laser writing signal (F-GATE) fails
to turn Low after the laser crosses 5
mm on the drum surface from the laser
writing start position.
•
BiCU board defective
•
IMB board defective
•
The fax controller or printer controller
has a poor connection
•
Fax controller or printer controller
defective