Ricoh B064 Service Manual page 261

SC No.
510 C LCT tray malfunction
One of the following conditions is
detected:
• When the bottom plate is lifted,
the upper limit sensor does not
come on for 18 s.
• When the bottom plate is
lowered, the lower limit sensor
does not come on for 18 s.
• After lift begins, the upper limit
sensor does not switch on before
the pick-up solenoid switches on.
• The paper end sensor switches
on during lift and the upper limit
sensor does not switch on for 2.5
s, and a message prompts user
to reset paper.
515 C Tandem rear fence motor error
One of the conditions is detected:
• The rear fence does not reach
the return position with 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.
520 C 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 C 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.
SM
Symptom
4-21
SERVICE CALL CONDITIONS
Possible Cause
• Tray lift motor defective or connector
disconnected
• Lift sensor defective or disconnected
• Pick-up solenoid defective or
disconnected
• Paper end sensor defective
• 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
• 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
B064/B065