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SC CODES
SC
Item
Detection Conditions
No.
SC522 Duplex - Side
- Timing & Condition -
• The home position is still
fence jogger
H.P. error
detected a few seconds
after the side fence leaves
from the home position.
• The home position is not
detected 12 seconds after
the side fence moves back
to the home position.
SC524 Duplex - End
- Timing & Condition -
• The home position is still
fence jogger
H.P. error
detected a few seconds
after the end fence leaves
from the home position.
• The home position is not
detected 13 seconds after
the end fence moves back
to the home position.
SC541 Hot roller
- Timing -
thermistor
Every 1 second when the
open
fusing unit is installed
- Condition -
The hot roller thermistor
output is almost close to 5V,
which corresponds to 0 °C, for
6 seconds continuously.
Related
Possible Causes
SCs
• Duplex unit not set
SC524
properly
• Excessive load
• Poor connection of
connector
• Defective side
fence motor
• Defective I/O
control board
• Duplex unit not set
SC522
properly
• Excessive load
• Poor connection of
connector
• Defective end
fence motor
• Defective I/O
control board
• Fusing unit not set
properly
• Poor connection of
connector
• Defective
thermistor
• Defective I/O
control board
• Defective main
control board
18
Troubleshooting Procedure
1. Pull out and re-insert the duplex unit.
2. Check the connector (CN485) is properly connected on
the duplex control board.
3. Check if anything causes overload to the motor.
4. Replace the side fence motor (Output Check: SP 5-804
93 and 94).
5. Replace the I/O control board.
1. Pull out and re-insert the duplex unit.
2. Check the connector (CN486) is properly connected on
the duplex control board.
3. Check if anything causes overload to the motor.
4. Replace the end fence motor (Output Check: SP 5-804
95 and 96).
5. Replace the I/O control board.
1. Check if the fusing unit is properly set.
2. Check if the thermistor connector is properly
connected.
3. Replace the thermistor if it is deformed.
4. Replace the thermistor if it is opened by measuring the
resistance. (Refer to the Temperature/ Resistance
Conversion Reference Table at the end of this table.)
5. Replace the I/O control board.
6. Replace the main control board.
- Signals to Check -
• Thermistor: CN206-B9, TP231, or CN214-B1 on I/O
control board / CN302-B9 or TP154 on main control
board.
24 February 1999
Type
B
B
A
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