Toshiba e-STUDIO556 Service Manual page 644

8.3.8 Scanning system related service call
[C260] Peak detection error
e-STUDIO556/656/756/856
Proced
Check item
ure
1 Is the exposure lamp lit?
(Output check: 03-267)
2 Shading correction plate
Mirror
Exposure lamp
CCD board / Lens unit
SLG board
3 SLG board
Inverter board
Exposure lamp
Supply harness
Replace parts
Lens unit
SLG board
Inverter board
Exposure lamp
Supply harness
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
Result
Yes It is lit.
No It is not lit.
Check if there is any scratch or stain on the shading correction plate.
1. Check if the mirror is tilted.
- Check that the lens is reflected in the mirror looking at carriage-1 from
the upper position.
- Check that the mirror is secured at the leaf spring.
1. Check if the exposure lamp is correctly lit.
2. Check if the harness is connected properly to the exposure lamp
connector.
3. When the carriage is driven, check if the harness interferes with it or
parts are caught in it.
1. Check if the connector of the CCD board is connected properly.
2. Check if the CCD board is installed properly. (Check that the lens unit
is not tilted or the screw is securely tighten.)
3. Replace the Lens unit.
1. Check if the connector of the SLG board is connected properly.
2. Check if the mounted parts on the SLG board are damaged or
abnormal.
3. Check if 10 V is output from the power supply for CCD.
4. Replace the SLG board.
1. Check if the supply cable is connected properly to the connector.
2. Check if the mounted parts on the SLG board are damaged or
abnormal.
3. Replace the SLG board.
1. Check if the harness of the exposure lamp is connected to the
inverter board properly.
2. Check if the supply harness to the inverter board is connected
properly.
3. Check if the mounted parts on the inverter board are damaged or
abnormal.
4. Replace the Inverter board.
1. Check if the harness of the exposure lamp is connected to the
inverter board properly.
2. Check if the exposure lamp is scratched or damaged.
3. Replace the Exposure lamp.
1. Check if wiring of the supply harness (CN127) is abnormal.
2. Check if the harness is scratched or open circuited.
3. Replace the Supply harness.
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