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ERROR CODE and TROUBLESHOOTING
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[C290] Scanner fuse blowout
3 SLG board 1. Check if the harness of the carriage home position sensor is
connected properly.
2. Check if the mounted parts on the SLG board are damaged
or abnormal.
4 Scan motor 1. Check if the belt tension is loosened (if the motor screw is
loosened).
2. Check if the wire and the belt come off.
3. Check if the connector (J007/J125) is connected to the
motor properly.
4. Check if the harness of the motor is caught or open
circuited.
Parts to be replaced Remark
Carriage home position sensor
Carriage home position sensor
harness
SLG board
Scan motor
Scan motor harness
Classification Error content
Scanning system related
service call
The scanning system does not operate due to a blowout of the fuse
in the scanning system.
Proce
dure
Check item Result Measure
Next
Step
1 Is 24V supplied to the SLG
board?
Yes Supplied. 2
No Not supplied. 3
2 SLG board Check the following because the signal for checking 24V on the
SLG board is abnormal.
1. Check if 3V is input in 35 Pin of the scanner CPU (IC15).
2. Check if the mounted parts on the SLG board are damaged
or abnormal.
3 Supply harness 1. Check if the supply harness is connected properly to the
connector.
SLG board 1. Check if 24V and SG on the SLG board are short circuited.
2. Check if the power supply is short circuited by pulling out the
supply harness on the SLG board.
LVPS 1. Check if the fuse on the LVPS is open circuited.
Parts to be replaced Remark
SLG board
Fuse
Supply harness
LVPS
Proce
dure
Check item Measure
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