Ricoh D069 Field Service Manual page 245

No.
Definition
Laser synchronization error
The main scan synchronization detector
322 B
does not detect the laser signal for 0.5
second.
TD sensor error
The BICU detects the TD sensor outputting
390 B
extraordinary voltage (less than 0.2 V or
more than 4.0 V) 10 times consecutively.
Development bias leak
391 B
The polling module detects a current leak
of the development bias.
Developer initialization error
The ID sensor does not detect a correct
392 B
pattern during developer initialization (
2-214-001).
Symptom
SC Tables (Basic: D067/D072)
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
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