Toshiba e-STUDIO556 Service Manual page 101

[C290] Scanner fuse blowout
e-STUDIO556/656/756/856
Check item
Is 24V supplied to the SLG board?
e-STUDIO557/657/757/857
Check item
Is 24V supplied to the DRV board?
Replace parts
SLG board
DRV board
Fuse
Supply harness
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
Result
Yes Check the following because the signal for checking 24V on
the SLG board is abnormal.
1. Check if 3.3V is input in 35 Pin of the scanner CPU (IC15).
2. Check if the mounted parts on the SLG board are
damaged or abnormal.
3. Replace the SLG board.
No 1. Check if the supply harness is connected properly to the
connector.
2. Check if 24V and SG on the SLG board are short circuited.
3. Check if the power supply is short circuited by pulling out
the supply harness on the SLG board
4. Check if the fuse on the LVPS is open circuited.
5. Replace the Fuse on the LVPS.
6. Replace the Supply harness.
Result
Yes Check the following because the signal for checking 24V on
the DRV board is abnormal.
1. Check if 3.3V is input in 35 Pin of the scanner CPU (IC429)
on the SYS board.
2. Check if the mounted parts on the DRV board are
damaged or abnormal.
3. Replace the DRV board.
No 1. Check if the supply harness is connected properly to the
connector (CN005).
2. Check if 24V and SG on the DRV board are short circuited.
3. Check if the power supply is short circuited by pulling out
the supply harness on the DRV board (CN005).
4. Check if the fuse on the LVPS is open circuited.
5. Replace the Supply harness.
(e-STUDIO556/656/756/856)
(e-STUDIO557/657/757/857)
© 2011 - 2014 TOSHIBA TEC CORPORATION All rights reserved
8 - 100
Measures
Measures
Remarks