Ricoh G176 Service Manual page 75

Fusing lamp remains on
The fusing lamp remained on longer
545 A
than 12 sec. after the fusing unit
reached optimum temperature and the
main motor switched off.
Unstable fusing temperature
During standby, the fusing temperature
went below 60 °C twice or went above
60 °C three times within 500 ms.
546 A
A 60°C increase in fusing temperature
was detected at five 1-sec. intervals
within 60 to 90 sec. before reaching
fusing temperature.
Zero cross signal error
Zero cross signals of wavelength 50-60
Hz were not detected within 5 sec after
547 B
the fusing relay switched on.
-or-
Zero cross interrupts did not issue at
the prescribed 1 sec. intervals.
559 A Fusing unit jam
Three consecutive paper lag jams
(paper failed to arrive) were detected in
the fusing unit. -or-
During printing of the 1st side during
duplexing, the paper did not arrive at
the duplex entrance sensor three
times.
SM
Service Call Conditions
Fusing thermistor defective
Power supply board defective
Defective connection of the
fusing unit
Fusing thermistor defective
Power supply board defective
Defective connection of the
fusing unit
Power supply board defective
Defective mains power supply
condition
Fusing unit installed
incorrectly
Fusing unit defective
4-5 G176/G177/G176L