KV-S7075C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 109

109

No power

1. Power cord is not correctly inserted.

Insert the power cord correctly.

2. Cables in the scanner are not
    connected properly. (especially around
    POWER Board)

Insert the cables properly.

Pay attention
 when
 reassembling
 the scanner.

3. FAN does not rotate.

1. Rotate the FAN, manually.
2. Check the connection between CN803
    (on the POWER Board) and FAN.
3. Remove the FAN. 

4. Power circuit (including a safety circuit)
does not work properly.

1. Replace POWER Board.

5. LED (Indicators) or its drive circuit does
not work correctly.

1. Check the following connections and
    soldering condition on PANEL, DRIVE,
    CENTER, and CONTROL Boards:
  (1) CN1 (PANEL Board) to CN4003
       (DRIVE Board)
  (2) CN4004 (DRIVE Board) to CN2003
       (CENTER Board)
  (3) CN2001 (CENTER Board) to CN1001
       (CONTROL Board)
2. Replace the PANEL Board.
3. Replace the DRIVE Board.
4. Replace the CENTER Board.
5. Replace the CONTROL Board.

6. Boot program of this scanner does not
work correctly. 

1. Check the soldering condition on
    CONTROL Board. 
2. Replace the CONTROL Board.