SERVICE CALL CONDITIONS
SM 4-5 B044/B045/B046
Trouble-
shooting
No. Definition
SC
Code
Error
Code
Level
Symptom Possible Cause
Unstable fusing temperature546 9-22 A
Detected that fusing
temperature changed more
than ± 25°C/second two
seconds in succession.
(
☛
4.4)
• Fusing thermistor defective
• PSU defective
• Bad connection between fuser and
machine
Zero-cross detection error547 9-22 B
Detection error (detection
overflow or busy) occurred 8
times in succession (at 20-ms
intervals) while 24V power was
on.
(
☛
4.4)
• PSU defective
• FCU defective
Fusing-temperature range violation (too high)548 9-22 A
During paper transport, fusing
temperature moved above limit
(200°C for plain paper, 210°C
for thick paper) and remained
above limit for 10 seconds.
(
☛
4.4)
• TRIAC short
• Fan not running
Fusing-temperature range violation (too low)549 9-22 A
During paper transport, fusing
temperature fell below lower
limit (155°C) and remained
below limit for 6 seconds.
(
☛
4.4)
• Fusing thermistor defective
• PSU defective
Standby temperature error 1550 9-22 A
Fusing temperature failed to
drop to expected level within a
given time (15 seconds, 15
minutes, or 25 minutes,
depending on mode) after
entering standby or low-power
mode.
(
☛
4.4)
• TRIAC short
• Fan not running
Standby overheat551 9-22 A
Temperature during standby or
low-power mode remained too
high for a specified interval (10
seconds or 25 seconds,
depending on the mode).
(
☛
4.4)
• TRIAC short
Standby low temperature error552 9-22 A
After reaching expected
temperature in low-power
mode (level 1) or standby
mode, temperature fell and
remained below 155°C for 20
seconds.
(
☛
4.4)
• Fusing thermistor defective
• PSU defective
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