Communication Error Between The Ccd Board And The Sys Board; Carriage Home Position Sensor Not Going Off Within A Specified Time - Toshiba e-STUDIO206L Service Manual

[C262] Communication error between the CCD board and the SYS board (e-STUDIO257/257P/
357/457/507)
Classification
Scanning system related service
call
Proce
Check item
dure
1 Lens unit
2 SYS board
3 Harnesses
Parts to be replaced
Lens unit
SYS board
Harnesses
[C270] Carriage home position sensor not going OFF within a specified time (e-STUDIO206L/
256/306/356/456/506)
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 locking
2 Carriage home position
sensor
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Error content
Peak detection error (the light source is extremely light)
1. Check if the connector is properly connected all the way in
the CCD board.
2. Check if there is any abnormality in the appearance of parts
mounted on the CCD board.
3. Check if +5V is output to the lens unit.
4. Check if +3.3V is output from IC9. Check if +1.8V is output
from IC11.
5. Replace the Lens unit.
1. Check if the connector is properly connected all the way in
the SYS board.
2. Check if there is any abnormality in the appearance of parts
mounted on the SYS board.
3. Check if +5V is output to the SYS board.
4. Replace the SYS board.
1. Check if the harness has any scratch on it or is open
circuited or caught anywhere.
2. Check if there is any abnormality in the connector terminal
or the contacting surface of the flat harness.
3. Replace the harness between the SYS board and the CCD
board.
Error content
The carriage does not shift from its home position in a specified
period of time.
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.
e-STUDIO206L/256/306/356/456/506 / 207L/257/307/357/457/507
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Remark
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ERROR CODE AND TROUBLESHOOTING
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