Rex Rottary 627, Ricoh Aficio 2027 SC545

 545 A Fusing overheat error 3
After warmup, the hot roller attained full
operating temperature and maintained
this temperature for 10 sec. without the
hot roller rotating.

• Hot roller thermistor is out of position
• Fusing lamp broken
• Thermostat broken

 check  & RESET  7810 #

 520 B Paper tray error
An error occurs (i.e motor error, or
sensor error, etc) for any paper tray.
• A defective motor
• A defective sensor
• Too much load on the drive
mechanism
541 A Fusing thermistor open
The fusing temperature detected by the
thermistor was below 0 °C for 5
seconds.
The fusing temperature does not rise
+15 °C (center) or +12 °C (at the ends)
five times within 2 minutes after the
fusing lamps have been turned on.
• Fusing thermistor defective or out of
position
• Fusing lamp open
• Fusing thermostat open
• Power supply board defective
• Poor connection of the fusing unit

542 A Fusing temperature warm-up error  FUSER CHASSIS...

The fusing temperature does not reach
the standby temperature within 20
seconds after the main switch is turned
on.
• Fusing thermistor defective or out of
position
• Fusing lamp open
• Fusing thermostat open
• Power supply board defective
• Poor connection of the fusing unit

543 A Fusing overheat error 1
A fusing temperature of over 231°C is
detected for 5 second by the fusing
thermistor.
• Fusing thermistor defective
• Power supply board defective
• SBCU board defective

544 A Fusing overheat error 2
A fusing temperature of over 251°C is
detected by the fusing temperature
monitor circuit in the SBCU board.
• Fusing thermistor defective
• Power supply board defective
• SBCU board defective

546 A Unstable fusing temperature
The fusing temperature varies 50°C or
more within 1 second twice
continuously.
• Thermistor defective
• Poor connection of the fusing unit
• Power supply unit defective

547 B Zero cross signal malfunction
Zero cross signals are not detected
within a certain period.
• Power supply board defective

2012-07-17 

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