Sc300: Image Development System (1) - Ricoh MT-C1 Service Manual

15 February 2006

SC300: Image Development System (1)

SC No.
300 D Charge corona output error
The feedback voltage from the
charge corona unit is detected too
high 9 times.
303 D Charge corona grid leak
When the high voltage is output to
the corona grid, feedback voltage
exceeds the prescribed value 9
times.
305 D Charge corona wire cleaner error 1
The charge corona wire cleaner
motor is detected:
• Motor locks within 4 s after
switching on, or does not lock
within 30 s.
• Motor locks within 10 s after
reversing, or does not lock within
30 s.
306 D Charge corona wire cleaner error 2
The current at the charge corona
motor is detected less than 83 mA.
When SC310~SC317 are logged, the machine halts without displaying the SC number. These SC
codes log an abnormal condition at the potential sensor only when SP3901 (Auto Process Control)
is set to on.
SC No.
310 C Potential sensor calibration error 1
During drum potential sensor
calibration, the drum potential
sensor output voltage does not
meet specification when test
voltages (–100V, –800V) are
applied to the drum.
311 C Potential sensor calibration error 2
During drum potential sensor
calibration, the drum potential
sensor output voltage does not
meet specification when test
voltages (–100V, –800V) are
applied to the drum.
Symptom
Symptom
4-15
B064 SERIES SERVICE MODE
Possible Cause
• Charge corona power pack defective
• Charge corona harness disconnected
• Poor charge corona unit connection
• Charge corona power pack defective
• Charge corona harness disconnected
• Poor charge corona unit connection
• Charge corona wire cleaner motor
defective
• BCU board defective
• Charge corona wire cleaner motor
connector is defective or not connected.
Possible Cause
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• Development power pack defective
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• Development power pack defective