Ricoh G147 Service Manual page 164

after 3 attempts to detect the
zero-cross signal.
2. During 11 zero-cross signal
detections, two zero-cross signal
detections were below 44 Hz.
3. The zero-cross signal could not
be detected within 3 sec. after
the fusing relay switched on.
Fusing unit installation error
The machine cannot detect the fusing
548 A
unit when the front cover and right
cover are closed.
Zero-cross frequency over
The applied power ac frequency was
557 C
detected less than 66 Hz more than
10 times, or less than 44 Hz one time.
Fusing unit jam
The fusing exit sensor detected a
fusing unit paper late jam three times.
559 A
The paper was late and the fusing
exit sensor could not detect the paper
three times.
SC559 code does not operate until SP1109 has been set to "1" (ON). This sets the
machine to count the number of occurrences of paper late jams in the fusing unit.
The default setting is "0" (OFF).
SC559 is issued after the third occurrence of a paper late jam in the fusing unit.
Once this SC has been issued, the machine cannot be used until the service
technician removes the cause of the jam and restores it to normal operation.
G147
Fusing unit is not installed
Fusing unit connection loose
Noise on the ac power line
Remove the paper that is
stopped in the fusing unit.
Check that the fusing unit is
clean and has no obstacles in
the paper feed path.
If the error persists, replace the
fusing unit
4-14 SM