Ricoh Russian-C2a Service Manual page 289

10 August, 2001
Code No.
197 B DFGATE error
The DFGEATE signal has already been
asserted at the original scan.
198 B Memory address error
The IPU board does not receive the
memory address from the controller
board.
199 B DF scanning finish error
The original does not finish scanning
with in 1 minute
302 B Charge roller current leak
A charge roller current leak signal is
detected.
320 B Polygon motor error
The polygon motor does not reach its
operating speed within 10 seconds after
the polygon motor on signal, or the lock
signal is not detected for more than 200
ms continuously during operation.
322 B Laser synchronization error
The main scan synchronization detector
board cannot detect the laser
synchronization signal for more than 10
consecutive 50 ms intervals.
323 B LD drive current over
The LD drive board applies more than
100 mA to the LD.
390 D TD sensor error
The TD sensor outputs less than 0.5V
or more than 4.0V 10 times
consecutively during copying.
391 B Development bias leak
A development bias leak signal is
detected.
392 B TD sensor initial setting error
TD sensor output voltage falls out of the
adjustment range (2.0 ±<> 0.2 V) after
the TD sensor initial setting has been
finished.
Symptom
7-3
SERVICE CALL CONDITIONS
Possible Cause
• ADF interface cable defective
• SBCU board defective
•
Mismatched firmware between the
SBCU board and ADF
• Mismatched firmware between the
SBCU board and controller board
• Controller defective
• SBCU defective
•
IPU board defective
• ADF interface cable defective
• SBCU board defective
•
Mismatched firmware between the
SBCU board and ADF
• Charge roller damaged
• Charge high voltage supply board
defective
•
Poor connection of the PCU
• Polygon mirror motor defective
• Poor connection between the
polygon mirror motor driver and the
SBCU board
•
SBCU board defective
• Poor connection between the laser
synchronization detector board and
the SBCU board
• Laser synchronization detector board
out of position
• Laser synchronization detector board
defective
•
SBCU board defective
•
LD unit defective
• LD unit defective (not enough power,
due to aging)
• Poor connection between the LD unit
and the SBCU board
•
SBCU board defective
• TD sensor abnormal
•
Poor connection of the PCU
• Poor connection of the PCU
•
High voltage supply board defective
• Someone forgot to remove the toner
seal of the PCU
• ID sensor defective
• TD sensor abnormal
• Drum does not turn
• Development roller does not turn
• Poor connection of the PCU