Ricoh B202 Service Manual page 244

SC No. Item
SC 552 Pressure roller After the main switch is turned
warm-up error on or the door is closed, the
pressure roller temperature
does not reach the ready
temperature within 210
seconds during fusing unit
warm-up.
SC 553 Pressure roller The detected pressure roller
fusing lamp temperature stays at 210°C or
overheat more for five seconds.
SC 555 Pressure roller When the fusing unit is not
fusing lamp running in the Ready condition,
consecutive full the pressure roller-fusing lamp
power keeps ON with full power for
300 consecutive seconds.
SC 560 Zero cross error When the main switch is
turned on, the machine checks
how many zero-cross signals
are generated during 500 ms.
If the number of zero-cross
signal generated is either more
than 66 or less than 45 and
when this condition is detected
10 consecutive times, this
code is displayed.
SC 620 ARDF
• After the ARDF is detected,
communication
error
SM
Definition
• Pressure roller fusing
• Defective pressure
• Defective BCU
• Defective PSU
• Defective BCU
• Pressure roller
• Electrical noise in the
• Incorrect installation
the break signal occurs or
communication timeout • ARDF defective
occurs.
• IPU board defective
• External noise
Related
Possible Cause
SCs
SC 542
lamp broken
roller thermistor
SC 543
SC 545
thermistor out of
position
supply from the
power cord
of ARDF
4-29
Troubleshooting Procedure
1. Check if the pressure roller thermistor
is firmly connected.
2. Replace the fusing unit.
3. Replace the BCU.
1. Replace the fusing unit.
2. Replace the PSU.
3. Replace the BCU.
1. Replace the fusing unit.
1. Replace the PSU.
1. Turn the main switch off and on.
2. Check the cable connection of the
ARDF.
3. Shut out the external noise.
4. Replace the ARDF.
5. Replace the IPU board.
SC TABLE
Type
A
A
A
A
D
B202/178/B180