Ricoh Aficio Color 3006 Service Manual page 452

SC CODES
SC
Item Detection Conditions
No.
SC495 Temperature - Timing & Condition -
sensor error
The temperature sensor
output is out of range (2.75V
or greater or less than 0.25V).
SC496 Humidity - Timing & Condition -
sensor error
The humidity sensor output is
out of range (2.75V or greater
or less than 0.25V)
SC500 Fusing motor
- Timing & Condition -
• The feedback signal from
error
the motor is still out of
range 1 second after the
trigger signal is sent.
• The feedback signal
becomes out of range for 2
seconds while the trigger
signal is on.
Related
Possible Causes
SCs
• Poor connection of
connector
• Defective humidity
sensor
• Defective I/O
control board
• Defective main
control board
• Poor connection of
connector
• Defective humidity
sensor
• Defective I/O
control board
• Defective main
control board
• Poor connection of
connector
• Defective fusing
motor
• Defective I/O
control board
• Defective main
control board
16
Troubleshooting Procedure
1. Check that the connectors (CN236, 214 & CN302) are
properly connected on the I/O control board and main
control board.
2. Replace the humidity sensor.
3. Replace the I/O control board.
4. Replace the main control board.
- Signals to Check -
• Temperature: CN236-6, TP247, or CN214-A9 on I/O
control board / CN302-A1 or TP223 on main control
board
1. Check the connector is properly connected on the I/O
board (CN236).
2. Replace the humidity sensor.
3. Replace the I/O control board.
4. Replace the main control board.
- Signals to Check -
• Humidity: CN236-3, TP222, or CN214-A8 on I/O
control board / CN302-A2 or TP168 on main control
board
1. Check if the connector (CN204) is properly connected
on the I/O control board.
2. Replace the fusing motor. (Output check: SP 5-804-
05,-06,-07,-08)
3. Replace the I/O control board.
4. Replace the main control board.
5. Check if anything causes overload for the fusing unit
drive.
- Signals to Check -
• Motor OK: CN204-7 on I/O control board
24 February 1999
Type
C
C
D