Toshiba e-STUDIO2008A Service Manual page 699

[C270] Carriage home position sensor not going OFF within the specified time (e-STUDIO207L/
257/307/357/457/507)
Classification
Scanning system related service
call
Remove the original glass and move the carriages to the paper feeding side. Turn ON the power and
check the following items.
Check item
1 Carriage home position
sensor
SYS board
Scan motor
2 carriage lock
3 Setting
Parts to be replaced
Carriage home position sensor
Carriage home position sensor
harness
SYS board
Scan motor
Scan motor harness
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Error content
The carriage does not shift from its home position in a specified
period of time. / Abnormal carriage home position sensor.
1. Check if the harness of the carriage home position sensor is
connected properly.
2. Check if the harness has any scratch on it or is open
circuited or caught anywhere.
3. Check if there is any abnormality in the carriage home
position sensor.
4. Replace the carriage home position sensor.
5. Replace the harness.
1. Check if the harness (CN127) of the carriage home position
sensor is connected properly.
2. Check if there is any abnormality in the parts mounted on the
SYS board.
3. Check if 24V on the SYS board is short circuited.
4. Check if 24V is supplied to the SYS board.
5. Check if there is any abnormality in the parts mounted on the
SYS board.
6. Replace the SYS board.
1. Check if the belt tension is loosened.
2. Check if the motor fixing screw is loosened.
3. Check if the carriage wire and the timing belt come off.
4. Check if the connector is connected to the scan motor
properly.
5. Check if the harness of the scan motor has any scratch on it
or is open circuited or caught anywhere.
6. Replace the scan motor or the harness.
1. Check if the carriage locking is released.
Clear the SRAM data by starting the equipment in the 3C mode,
and initialize them in the 08 mode.
(Refer to  P. 9-25 "9.2.8 Precautions and procedure when
replacing the SRAM").
8 - 161
Measure
Remark
e-STUDIO2008A/2508A/3008A/3508A/4508A/5008A
ERROR CODE AND TROUBLESHOOTING
8