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The thermistor inside the fusing unit is caked up with toner, is worn out, or is defective. If it is good, then it is a power supply problem and would have to be replaced.
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SC 544
Heating roller thermopile (center) error 3
The thermopile detected a temperature over 260?C.
•
TRIAC short, AC drive board defective
•
Defective IOB 2
•
Defective BCU
Related SC code: SC 553, SC563
1.
Do SP5810 to cancel the SC fusing code.
2.
Replace the AC drive board.
3.
Replace the IOB 2.
4.
Replace the BCU.
GO TO SERVICE MODE AND SP5810 to Clear - Check temp inputs - SP5803 150, 151, 152
Well, I have no idea why changing your password would affect it this way. the code you're experiencing is a fuser warm up error, due to blown fuse, thermostsat, possible power supply prob...regardless, it can only be reset by a service tech in service mode once the problem is fixed. Sorry.
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