Ricoh B051 Service Manual page 180

SERVICE CALL
No.
Definition
544 A Low temperature error (heating roller)
During standby or operation, the
heating roller thermistor detects
100 °C or less for 5 seconds.
545 A Full power error (heating roller)
Fusing unit warm-up is complete. →
The heating roller stops turning. →
The heating roller lamp keeps
outputting the maximum power for 30
seconds.
546 A Unstable temperature (heating roller)
The heating roller thermistor detects
unstable temperature increases or
decreases within 60 seconds.
551 A Thermistor disconnection (pressure roller)
The pressure roller thermistor detects
7°C or lower for 30 seconds.
552 A Warm-up time over (pressure roller)
The main switch is turned on or a
cover is closed. → The fusing
pressure roller does not reach the
ready temperature within 200
seconds.
553 A Overheat error (pressure roller)
The pressure roller thermistor detects
165°C for 5 seconds.
554 A Low temperature error (pressure roller)
During standby or operation, the
pressure roller thermistor detects
60°C or less for 5 seconds.
555 A Full power error (pressure roller)
Fusing unit warm-up is complete.→
The fusing pressure roller stops
turning. → The pressure roller lamp
keeps outputting the maximum power
for 200 seconds.
556 A Unstable temperature (pressure roller)
The pressure roller thermistor detects
unstable temperature increases or
decreases within 60 seconds.
560 D Zero cross error
The main switch is turned on; the
fusing relay turns on. → 50 Hz or 60
Hz is not detected within 5 seconds.
B051/B052
CÓPIA NÃO CONTROLADA
Symptom
4-8
CÓPIA NÃO CONTROLADA
Possible Cause
• Defective lamp (loose connection,
thermostat failure, PSU, thermostat)
• Incorrect detection (loose thermistor
connection, fusing - drawer loose
connection)
• Thermistor loose connection
• Fusing - drawer loose connection
• Thermistor loose connection
• Fusing - drawer loose connection
• Thermistor loose connection
• Defective harness
• Defective connector
• Defective lamp (loose connection,
thermostat failure, PSU, thermostat)
• Incorrect detection (thermistor loose
connection, fusing - drawer loose
connection)
• Loose connection
• Defective BICU board
• Defective PSU
• Defective lamp (loose connection,
thermostat failure, PSU, thermostat)
• Incorrect detection (thermistor loose
connection, fusing - drawer loose
connection)
• Thermistor loose connection
• Fusing - drawer loose connection
• Thermistor loose connection
• Fusing - drawer loose connection
• Defective PSU
• Incorrect power supply
SM