Ricoh MT-C1 Service Manual page 411

15 February 2006
SC No.
545 A Fusing lamp overheat error 2
After hot roller reaches the warm-
up temperature, the fusing lamps
continued full capacity output for 55
s without the hot roller rotating (for
a total of 45s).
547 D Zero cross signal malfunction
One of the following conditions is
detected 10 times:
• When the main switch is on, the
frequency measured by the
number of zero cross signals for
500 ms is larger than 66Hz or
smaller than 45 Hz.
• The interval between one zero
cross signal and the next is 7.5
ms or shorter 3 times
consecutively for 500 ms.
550 A Fusing Web End
Web end detected 5 times within
500 ms and web motor continues to
rotate 40 s. If web end is detected
for another 400 ms, then the SC is
logged.
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 (should only occur in Japanese models)
The transport lock sensor output
does not change within 300 ms
after the motor switches on.
Symptom
4-23
B064 SERIES SERVICE MODE
Possible Cause
• Fusing thermistor out of position
• Noise on the ac power line
• Web end (requires replacement)
• Web end sensor defective
Note: After replacing the web with a new
one, reset SP1902 001 to 0 to
release SC550.
• Toner collection motor defective
• Motor drive defective
• Toner collection motor sensor connector
defective
• Motor overload
• Motor overload
• Motor drive defective