Toshiba E-STUDIO4508A - Page 703

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ERROR CODE AND TROUBLESHOOTING
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[C290] Scanner fuse blowout (e-STUDIO207L/257/307/357/457/507)
Classification Error content
Scanning system related
service call
Power is not supplied to the scanner due to its power fuse blowout
and it does not operate
Check item Result Measure
Is 24V supplied to the SYS
board?
Yes Check the following because the 24V check signal on
the SYS board is abnormal:
1. Check if there is any abnormality in the parts
mounted on the SYS board.
2. Check if 3V is input in Pin 35 of the scanner CPU
(IC15) of the SYS board.
3. Replace the SYS board.
No 1. Check if the supply harness (CN130) is connected
properly.
2. Check if 24V and SG on the SYS board are short
circuited.
3. Check if the power supply is not short circuited by
disconnecting the supply harness (CN130) on the
SYS board.
4. Check if the fuse on the switching power supply
(LVPS) is open circuited.
5. Replace the fuse.
6. Replace the supply harness.
Parts to be replaced Remark
SYS board
Fuse
LVPS
Harness