Service Call
SM 6-9 M0C3/M0C4/M0C5/M0C6/M0C7
No. Type Error Name/Error Condition/Major Cause/Solution
SC551 A Non-contact thermistor error
The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns
ON.
Disconnected or defective non-contact thermistor
1. Reset the SC.
2. Replace the fusing unit.
3. Replace the drawer harness.
4. Replace the PSU.
No. Type Error Name/Error Condition/Major Cause/Solution
SC552 A Fuser reload error (non-contact thermistor)
The fusing temperature rises 1°C or less in 1.5 seconds; and this continues 5
times consecutively.
• Defective or deformed non-contact thermistor
• Incorrect power supply input at the main power socket
1. Reset the SC.
2. Replace the fusing unit.
3. Replace the drawer harness.
4. Replace the PSU.
No. Type Error Name/Error Condition/Major Cause/Solution
SC553 A High temperature error (soft) (non-contact thermistor)
The detected temperature stays at 220°C for 0.5 second, and this consecutively
occurs 10 times.
• Defective main board
• Defective PSU
1. Reset the SC.
2. Replace the main board.
3. Replace the PSU.
4. Replace the fusing unit.
5. Replace the drawer harness.
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