Toshiba e-STUDIO 2555C Service Manual page 686

Procedure
1 Carriage locking
2 Carriage hole position
sensor
3 SYS board
4 Scan motor
Parts to be replaced
Carriage home position sensor
Carriage home position sensor
harness
SYS board
Scan motor
Scan motor harness
[C290] Scanner fuse blowout
Classification
Scanning system related
service call
Check item
Is 24V supplied to the SYS
board?
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
Check item
Check if the carriage locking screw for packaging is
attached.
1. Check if the harness is properly connected to the
sensor.
2. Check if the harness is caught or open circuited.
1. Check if the harness (J002/J121) of the carriage
home position sensor is connected properly.
2. Check if the mounted parts on the SYS board are
damaged or abnormal.
3. Check if 24 V (CN127) on the SYS board is short
circuited.
4. Check if 24 V is supplied to the SYS board (CN127).
1. Check if the belt tension is loosened (if the motor
screw is loosened).
2. Check if the carriage wire and the timing 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.
The scanning system does not operate due to a blowout of the fuse
in the scanning system.
Result
Yes Check the following because the signal for checking 24V on
the SYS board is abnormal.
1. Check if 3V is input in 35 Pin of the scanner CPU
(IC301).
2. Check if the mounted parts on the SYS board are
damaged or abnormal.
3. Check if 24V on the SYS board is short circuited.
4. Check if 24V is supplied to the SYS board (CN127).
No 1. Check if the 24V supply harness is properly connected
to the connector (CN127).
2. Check if 24V and SG on the SYS board are short
circuited.
3. Check if the power supply is short circuited by pulling
out the supply harness on the SYS board (CN127).
4. Check if the fuse on the LVPS (F204) is open circuited.
5. Check if there is no abnormality on the LVPS.
Measures
Remark
Error content
Measure
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