Ricoh B064 Service Manual page 346

B064 SERIES SERVICE MODE
SC No.
515 B Tandem rear fence motor error
One of the conditions is detected:
• The rear fence does not reach
the return position within 10 s
after the rear fence motor
switches on, or does not return to
the HP.
• The HP sensor and return sensor
switch on at the same time.
516 B Tandem side fence motor error
The side fences do not reach the
fully open or closed position within
2 seconds after the side fence
motor switches on.
520 D Duplex jogger motor error 1
When the jogger fence moves to
the home position, the jogger HP
sensor does not turn on even if the
jogger fence motor has moved the
jogger fence 153.5 mm.
521 D Duplex jogger motor error 2
When the jogger fence moves from
the home position, the jogger fence
HP sensor does not turn off even if
the jogger motor has moved the
jogger fence 153.5 mm.
541 A Fusing thermistor open
• The fusing temperature detected
by the thermistor is below 7°C for
35 seconds.
• The center thermistor (non-
contact) abnormal.
542 A Fusing temperature warm-up error
• After power on, or after closing
the front door, the hot roller does
not reach the 80°C control
temperature within 360 s.
• After the fusing lamp
temperature exceeds 80°C,
temperature does not change 2
degrees within 20 s.
543 A Fusing lamp overheat error 1 (software)
• Central thermistor detected a
temperature of 230°C at the
center of the hot roller.
• End thermistor detected 220°C x
100 ms 5 times at the end of the
hot roller.
544 A Fusing lamp overheat error 1 (hardware)
The BCU detects an overheat error
even if the protection in the
software does not work.
B064 Series/B140 Series/G126
Symptom
4-22
Possible Cause
• Rear fence motor defective or poor
connection
• Paper or other obstacle trapped between
tray and motor
• Motor mechanical overload
• Return sensor or HP sensor defective or
dirty
• Side fence motor defective or poor
connection
• Motor mechanical overload
• Side fence positioning sensor defective
or dirty
• Paper or other obstacle has jammed
mechanism
• Sensor connector disconnected or
defective
• Sensor defective
• Paper or other obstacle has jammed
mechanism
• Sensor connector disconnected or
defective
• Sensor defective
• Thermistor open
• Thermistor connector defective
• Thermistor damaged or warped
• Fusing temperature –15% less than the
standard input voltage
• Fusing lamp disconnected
• Thermistor warped or installed incorrectly
• Thermostat operating
• PSU defective
• BCU defective
• PSU defective
• BCU defective
SM