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SERVICE CALL
No.
Definition
530
D
Fusing fan motor error
• The main power is turned on. →
The fusing fan lock signal is
detected for 2 seconds.
• The fusing fan is activated. → The
fusing fan lock signal is not
detected for 2 seconds.
541
A
Thermistor disconnection (heating roller)
The fusing unit starts warm up to the
print ready temperature. → The
temperature does not reach 0°C for
10 seconds.
542
A
Fusing warm-up timeout (heating roller)
The main switch is turned on or a
cover is closed. → The heating roller
does not reach the warm-up
temperature within 4 seconds.
543
A
Overheat error (heating roller)
The heating roller thermistor detects
220°C for 5 seconds.
544
A
Overheat error (heating roller)
The heating roller thermistor detects
230 °C.
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 12
seconds.
546
A
Unstable temperature (heating roller)
The heating roller thermistor detects
unstable temperature increases or
decreases within 60 seconds.
547
A
Zero cross error
The main power is turned on and the
machine checks how many zero-
cross signals are generated during
500 ms.
→ If the number of zero-cross signal
generated is more than 66 or less
than 45 and when this condition is
detected 10 consecutive times, this
code is displayed.
551
A
Thermistor disconnection (pressure roller)
The pressure roller thermistor detects
7°C or lower for 80 seconds.
Symptom
4-8
Possible Cause
• Defective fusing fan
• Disconnected or broken harness of the
fusing fan
• Defective thermistor
• Thermistor loose connection
• Defective connector
• Defective lamp (loose connection,
thermostat failure, PSU, thermostat)
• Incorrect detection (loose thermistor
connection, fusing - drawer loose
connection)
• Short circuit
• Defective BICU board
• Defective PSU
• Short circuit
• Defective BICU board
• Defective PSU
• Thermistor loose connection
• Fusing - drawer loose connection
• Thermistor loose connection
• Fusing - drawer loose connection
• Replace the PSU.
• FU12 is open.
• Thermistor loose connection
• Defective harness
• Defective connector
10 February 2005
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