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24 February 1999
SC
Item
Detection Conditions
No.
SC542 Hot roller
- Timing & Condition -
warm-up error
The hot roller thermistor does
not output an analog value
corresponding to the ready
temperature within 12 minutes
after the main switch is turned
on.
Related
Possible Causes
SCs
• Poor connection of
connectors
• Hot roller fusing
lamp blown
• Hot roller
thermofuse opened
• Power fluctuation
• Defective main
control board
• Defective I/O
control board
• Defective AC drive
board
19
Troubleshooting Procedure
1. Check if the following connectors are properly
connected:
•
Hot roller fusing lamp connectors
•
CN303 on the main control board
•
CN206 and CN214 on the I/O control board
•
CN105 on the PSU
2. Replace the hot roller fusing lamp if it is opened.
3. Replace the hot roller thermofuse if it is opened.
4. Check if the power supplied from the outlet fluctuates.
5. Replace the main control board, I/O control board, or
PSU (check the trigger signal at each pin and replace
any defective boards).
- Signals to Check -
• Hot roller fusing lamp trigger: CN303-B6 on main
control board / CN205-A4, TP267, or CN218-B6 on I/O
control board / CN106-5 on PSU.
SC CODES
Type
A
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