Ricoh MT-C1 Service Manual page 442

B140/B246 SERIES SERVICE MODE
553 A Fusing thermistor error 3
The end thermistor (contact type)
was at 240°C (464°F) for more than
1 second. The temperature is read
10 times every sec. (at 0.1 sec.
intervals).
555 A Fusing lamp error
After the start of the warmup cycle,
a fusing lamp was at full power for
1.8 seconds but the hot roller did
not turn.
557 Zero cross signal error
High frequency noise was detected
on the power line.
559 A Fusing jam: 3 counts
At the fusing exit sensor the paper
was detected late for three pulse
counts (lag error), and SP1159 was
on.
569 D Fusing pressure release motor error
During copying, the HP sensor
could not detect the actuator, tried
again 3 times and could not detect.
590 D Toner collection motor error
The toner collection motor sensor
output does not change for 3
seconds while the toner collection
motor is on.
599 D 1-bin Exit Motor Error (Japan Only)
The transport lock sensor output
does not change within 300 ms
after the motor switches on.
• PSU defective
• IOB control board defective
• BICU control board defective
• Thermistor bent, out of position
• Fusing lamp disconnected
• Circuit breaker opened
B246
• No action required. The SC code is
logged and the operation of the machine
is not affected.
B246
• ?????????? NIA Query!
• Motor lock because of too much load
• Motor driver defective
• HP sensor defective, disconnected,
connector defective, harness damaged
• Motor lock due to obstruction
• Motor driver board defective
• Motor connection loose, defective
• Toner collection motor sensor
disconnected, sensor defective
• Rotational transmission shaft (φ6 x 30)
missing
• Motor overload
• Motor driver defective
4-54
15 February 2006