Ricoh MT-C1 Service Manual page 440

B140/B246 SERIES SERVICE MODE
515 B Tandem rear fence motor error
One of the conditions is detected:
• The return sensor does not
switch on within 10 sec. after the
rear fence motor switches on.
• The HP sensor does not switch
on 10 sec. after the rear fence
motor switches on.
• 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.
531 D Fusing exit motor error
The PLL lock signal was low for 2
seconds during motor operation.
541 A Fusing thermistor open
The fusing temperature detected by
the center thermistor was below
0°C for 7 sec.
542 A Fusing temperature warm-up error
One of the following occurred:
• After power on, or after closing
the front door, the hot roller does
not reach the 100°C control
temperature within 25 s.
• 5 sec. after temperature rise
started, temperature remained
below 21°C after 5 samplings.
• Fusing unit did not attain reload
temperature within 48 sec. of the
start of fusing temperature
control.
• Rear fence motor defective or poor
connection
• Paper or other obstacle interfering with
operation of the sensors
• Paper or other obstacle trapped between
tray and motor
• Motor mechanical overload due to
obstruction
• Return sensor or HP sensor defective or
dirty
Note (B246)
• This problem will not issue the SC code
on the operation panel.
• The machine will prompt the operator to
reset tray by opening and closing it.
• If the problem persists, the machine will
display again and the tray cannot be
used.
• 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
• Motor lock caused by physical overload
• Motor drive PCB defective
• Thermistor open
• Thermistor connector defective
• Thermistor damaged, or out of position
• Fusing temperature –15% less than the
standard input voltage
• Fusing lamp disconnected
• Thermistor warped, out of position
• Thermostat not operating
4-52
15 February 2006