Ricoh K-C3 Service Manual page 128

B245/B276/B277/B268/B269 Service Manual
No.
Definition
320 B
321 C
322 B
390 B
391 B
Symptom
the charge roller is
detected.
Polygonal mirror motor error
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.
No laser writing signal (F-GATE) error
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.
Laser synchronization error
The main scan
synchronization detector
board cannot detect the
laser synchronization
signal for more than 5
consecutive 100 ms
intervals.
TD sensor error
The TD sensor outputs
less than 0.2 V or more
than 4.0 V 10 times
consecutively during
copying.
Development bias leak
Possible Cause
High voltage supply board defective
Poor connection of the PCU
Polygon mirror motor defective
Poor connection between the
polygonal mirror motor driver and the
BICU board
Damaged cable between BICU and
polygonal mirror motor driver
BICU board defective
BICU board defective
The fax controller or printer controller
has a poor connection
Fax controller or printer controller
defective
Poor connection between the LD unit
and the BICU board
Damaged cable between BICU and
LD unit
LD unit out of position
LD unit defective
BICU board defective
TD sensor abnormal
Poor connection of the PCU
18-Jan-06
119