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24 February 1999
SC
Item
Detection Conditions
No.
SC545 Hot roller
- Timing -
ready
Every 1 second after the
temperature
temperature reaches the
abnormal
ready condition
- Condition -
The hot roller thermistor
output does not reach the
ready temperature within 7
minutes.
SC547 Hot roller
- Timing -
temperature
Every 1 second, 2 minutes
does not
after the main switch turned
increase
on until the hot roller
temperature reaches the
ready condition
- Condition -
The hot roller temperature
does not increase by more
than 3 °C for a minute during
warm-up.
Related
Possible Causes
SCs
Same as SC543
• Poor connection of
connectors
• Hot roller fusing
lamp blown
• Hot roller
thermofuse opened
• Defective main
control board
• Defective I/O
control board
• Defective PSU
21
Troubleshooting Procedure
Same as SC543
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. Replace the main control board, I/O control board, or
AC drive board (check the trigger signal at each pin).
- 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
A
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