Ricoh D072 Service Manual page 261

SC Tables (F/SPF: D068/D069)
No.
Definition
Laser synchronization error
The main scan synchronization
322 B
detector does not detect the laser
signal for 0.5 second.
TD sensor error
The BICU detects the TD sensor
390 B
outputting extraordinary voltage
(less than 0.2 V or more than 4.0 V)
10 times consecutively.
Development bias leak
The polling module detects a
391 B
current leak of the development
bias.
Developer initialization error
The ID sensor does not detect a
392 B
correct pattern during developer
initialization (
D067/D068/D069/D072
Symptom
2-214-001).
3-6
Possible Cause
Toner bottle not installed
Loose connection between the
LD unit and the BICU
Defective cable between the
BICU and LD unit
LD unit out of position
Defective LD unit
Defective BICU
Defective TD sensor
Loose connection of the PCU
Loose connection of the PCU
Defective high voltage supply
board
Defective ID sensor
Insufficient developer
Defective drum operation
Defective development roller
operation
Loose connection of the PCU
Insufficient voltage for the
charge roller
SM Appendix