KV-SS081 - Panasonic Other Service Manuals Service Manual (repair manual). Page 32

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No power

1. Power Cord is not inserted to AC 
    Adaptor correctly

.

1. Insert the Power Cord to the AC Adaptor,
    correctly.
2. Replace the Power Cord. 

2. AC Adaptor does not work correctly or
    AC Adaptor failure occurs.

1. Connect the AC Adaptor to the scanner,
    again.
2. Replace the AC Adaptor.

3. LEDs (Red and Green Indicators) or
    their drive circuit does not work
    correctly.

1. Check the following connection and
    soldering condition on each connector:
     

→ J4 (CONTROL Board) to 

          J1 (PANEL Board)
2. Check the LEDs soldering condition on the
    PANEL Board.
3. Check the soldering condition (especially
    ASIC and J4) on the CONTROL Board. 
4. Replace faulty parts. 

4. Boot program for the scanner does not
    work correctly.

1. Check the soldering condition (especially
    ASIC) on the CONTROL Board.
2. Replace the CONTROL Board.

5. PC does not recognize USB
   connection.

1. Check the USB cable's connection
    between the PC and scanner.
2. Connect the USB cable again, and then
    restart the scanner so as to check whether
    the PC recognizes the USB connection.
3. Check the soldering condition (especially
    ASIC, and their surrounding circuits)
    on the CONTROL Board. 

Defects in the scanned
image
(ex: black or white lines
or banding in the image)

1. Dust on the Flatbed Glass

1. Clean the surface of the Flatbed Glass.
2. Execute "Carriage Test" in Sec. 9.3.5 to
    check the scanned image.

2. Dust on the scanning position on the
    Scanning Unit

1. Remove the dust on the scanning position.
2. Execute "Carriage Test" in Sec. 9.3.5 to
    check the scanned image.

3. Scanning Unit has some problems.

1. Execute "Carriage Test" in Sec. 9.3.5
    to check whether this phenomenon is
    reproduced
2. Check the connection between J3 
    (CONTROL Board) and CIS

(included in

    the Scanning Unit). 
3. Replace the Scanning Unit.

Scanning position is
shifted.

1.Scanning Unit mechanical problem

1. Check the mechanical condition of the belt
    and gears driven by the Carriage Motor.
2. Check the belt tension controlled by the
    Idle Pulley Assy.
3. Reassemble the Scanning Unit while
     checking the attachment of the shaft to the
     scanner.
4. Execute "Carriage Test" in Sec. 9.3.5.
5. Replace faulty parts.

Noise during scanning

1. Scanning Unit mechanical problem

1. Check the mechanical condition of the
    gears driven by the Carriage Motor and the
    gear of the Idle Pulley Assy. while 
    executing "Carriage Test" in Sec. 9.3.5.
2. Replace faulty parts