17 January, 2003
SC TABLE
4-21
SC No.
Item
Definition
Possible Cause
Related
SCs
Troubleshooting Procedure
Type
SC 490 Transfer bias /
paper attraction
roller bias leak
error
The high voltage supply board
- Transfer monitors the circuit
and detects current leaks. If
this happens, the high voltage
supply board sends a SC
signal (High to Low at CN213-
8) to the BCU.
The BCU monitors this signal
every 2 ms and generates this
SC code when the error
condition occurs 250
consecutive times.
•
Defective high
voltage supply board
- Transfer
•
Damaged transfer
belt
•
Transfer unit
•
Damaged high
voltage supply cables
•
Damaged cables
between the BCU and
high voltage supply
board
•
Defective BCU
1. Turn the main switch off and on.
2. Check the transfer unit and replace
the belt and/or the transfer unit if any
damage is found.
3. Replace the high voltage supply
board - Transfer.
4. Check and/or replace the high voltage
supply cables.
5. Check and/or replace the dc cables
between the BCU and high voltage
supply board.
6. Replace the BCU.
SC 501 Paper Tray 1
error
SC 502 Paper Tray 2
error
When the tray lift motor is
turned on, if the upper limit is
not detected within 10
seconds, the machine asks the
user to reset the tray. If this
condition occurs three
consecutive times, the SC is
generated.
•
Defective paper lift
sensor
•
Defective tray lift
motor
•
Defective bottom
plate lift mechanism
1. Turn the main switch off and on.
2. Check if the bottom plate smoothly
moves up and down manually.
3. Check and/or replace the paper lift
sensor.
4. Check and/or replace the tray lift
motor.