Service Call Conditions
D017/D018/D019/D020/D084/D085 3-16 SM Appendix
545 A Fusing overheat error 3 (center)
After warmup, the center of the hot
roller attained full operating
temperature and maintained this
temperature for 10 sec. without the hot
roller rotating.
Center hot roller thermistor
installed incorrectly,
disconnected.
Center hot roller thermistor
defective
547 B Zero cross signal detection error
Zero cross signals were not
detected within the prescribed
time.
PSU, BCU harness loose or
broken
PSU defective
BCU defective
551 A Fusing thermistor open (end)
The temperature of the
hot roller remained below
0
o
C for 5 sec. at the end
of the hot roller.
Fusing thermistor out of its position
because of incorrect installation
Fusing thermistor disconnected or defective
Power supply not within rated range (15%
or more below rating)
552 A Fusing temperature warm-up error (end)
The fusing temperature did not reach
the standby temperature within 20 sec.
at the center of the hot roller after the
main switch turned on.
Fusing thermistor defective or
out of position
Fusing lamp disconnected
Thermistor defective
Fusing lamp defective
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