Toshiba e-STUDIO 5540C Service Manual page 872

[C270] Carriage home position sensor not going OFF within a specified time / Downloading
firmware with an incorrect model
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.
Proce
Check item
dure
1 Carriage lock
2 Carriage home position
sensor
3 SLG board
4 Scan motor
Parts to be replaced
Carriage home position sensor
Carriage home position sensor
harness
SLG board
Scan motor
Scan motor harness
[C280] Carriage home position sensor not going ON within a specified time
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.
Proce
Check item
dure
1 Carriage lock
2 Carriage home position
sensor
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Error content
Carriage home position sensor not going OFF within a specified
time / Downloading firmware with an incorrect model
Measure
Check if the carriage locking screw for packaging is attached.
1. Check if the harness of the carriage home position sensor is
connected properly.
2. Check if the harness is caught or open circuited.
1. Check if the connector of the carriage home position sensor
on the SLG board is connected properly.
2. Check if the mounted parts on the SLG board are damaged
or abnormal.
3. If the model of the firmware downloaded is incorrect, a C270
error (exposure lamp blinks twice) occurs. If the exposure
lamp blinks twice, download the correct ROM.
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 motor properly.
5. Check if the harness of the motor is caught or open
circuited.
Remark
Error content
Carriage home position sensor not going ON within a specified time
Measure
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.
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