Ricoh S-C4.5, Field Service Manual

Page: 157 / 436

No.
Definition
Symptom Possible Cause
322 B
Laser synchronization error
The main scan synchronization detector
does not detect the laser signal for 0.5
second.
• 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
390 B
TD sensor error
The BICU detects the TD sensor outputting
extraordinary voltage (less than 0.2 V or
more than 4.0 V) 10 times consecutively.
• Defective TD sensor
• Loose connection of the PCU
391 B
Development bias leak
The polling module detects a current leak
of the development bias.
• Loose connection of the PCU
• Defective high voltage supply board
392 B
Developer initialization error
The ID sensor does not detect a correct
pattern during developer initialization
( 2-214-001).
• Defective ID sensor
• Insufficient developer
• Defective drum operation
• Defective development roller
operation
• Loose connection of the PCU
• Insufficient voltage for the charge
roller
SC Tables
155
6