Troubleshooting - Philips KV-S5055C Service Manual

10 TROUBLESHOOTING

10.1. Troubleshooting-1 (with no error message on PC)
Symptom
No power 1. Power cord is not inserted correctly
2. Cables in the scanner are not connected
properly. (especially around POWER Board)
3. FAN does not rotate.
4. Power circuit (including a safety circuit) does
not work, properly.
5. LED (Indicators) or its drive circuit does not
work, correctly.
6. Boot program of this scanner does not work,
correctly.
7. PC doesn't recognize the scanner.
(No communication)
Scanned Image Problems Dust on the Scanning Glass (F) or Scanning
(ex: black line or band, Glass (B)
white line or band)
Dust on the CCD lens inside the Scanning
Glass (F) or (B)
Optical Unit Front or Optical Unit Back is
broken.
Scanning position is When reassembling Optical Units or
shifted. mechanical parts related to conveying
documents, re-adjustment is not done.
When replacing CONTROL Board,
re-adjustment is not done.
The document skews Document Guides are not set correctly,
or has a crease when according to the size of
scanning documents on the Hopper Tray.
Rollers are dirty.
Rollers are not attached to the default position
properly when assembling.
Rollers have reached their life expectancy.
Possible Cause
106
Check Point
Insert the power cord correctly.
Insert the cables properly.
1. Try to rotate the FAN, manually.
2. Check the power supply to the FAN.
3. Remove the FAN.
Remove POWER Board or DRIVE Board.
1. Check Power to Drive Cable and Drive to
Control Cable.
2. Remove DRIVE Board or CONTROL Board.
Check the Indicators' status.
1. Check the USB cable between PC and
the scanner.
2. The scanner status is ready?
→ If yes, replace the IC 0010.
If no, check the LEDs (for Ready, Error).
3. Replace the CONTROL Board.
Clean the glass surface.
Remove the glass, and then clean the lens.
1. Execute Image Sensor Output in Sec. 9.3.6
to check the CCD condition.
2. Replace the Optical Unit ((F) or (B)).
3. Replace the CONTROL Board.
Execute All Position and/or Individual Position in
Sec. 9.3.7 to adjust the scanning position.
Set the Document Guides correctly.
Clean the rollers.
Assemble the rollers properly again.
Replace the rollers after inspecting them.
Remarks
Pay attention
when reassem-
bling the scanner.