e-STUDIO556/656/756/856/557/657/757/857 © 2011 - 2014 TOSHIBA TEC CORPORATION All rights reserved
ERROR CODE AND TROUBLESHOOTING
8 - 100
[C290] Scanner fuse blowout
e-STUDIO556/656/756/856
e-STUDIO557/657/757/857
Check item Result Measures
Is 24V supplied to the SLG board? 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.
Check item Result Measures
Is 24V supplied to the DRV board? 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.
Replace parts Remarks
SLG board (e-STUDIO556/656/756/856)
DRV board (e-STUDIO557/657/757/857)
Fuse
Supply harness
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