KV-S5055C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 109

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5. Conveyor Motor does not work
properly.

1. Check the motor mechanism condition by
    carrying out Conveyor Motor test.
    (See 9.3.6.)
2. Check the following connection and 
    soldering condition on each connector.
    

→ Conveyor Motor to CN4005

          (DRIVE Board)
3. Check the following signals on the DRIVE
    Board. 

→ CN4005-1, 3, 4, and 6th pins:

                       See Fig. 3.
4. Replace faulty cables.
5. Replace Conveyor Motor. 

6. Conveyor Motor circuit does not
work properly.

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

  

→ CN1002 (CONTROL Board) to CN4002

         (DRIVE Board)
2. Check the soldering condition of IC4007 
    and its surrounding parts.
3. Check the following signals on the
    DRIVE Board.

a. IC4007-12th pin (CLK): See Fig. 4.
b. IC4005-19th pin (VREF): 2.3V or less.
c. IC4005-15th pin (ENABLE): 5 V 
    (when executing Conveyor Motor test)

4. Check the soldering condition of IC0015 on
    the CONTROL Board to repair it.
5. Replace faulty parts or boards.

7. DFP Pressure Motor does not
work properly.

1. Check the motor mechanism condition by
    carrying out DFP Pressure Drive test. 
    (See 9.3.6.)
2. Check the following connection and
    soldering condition on each connector.
     

→ DFP Pressure Motor to CN4009 (DRIVE

           Board)
3. Check the following signals on the DRIVE
     Board.
      

→ CN4009-1 to 4th pins: See Fig. 5.

4. Replace faulty cables.
5. Replace DFP Pressure Motor. 

8. DFP Pressure Motor circuit does
    not work properly.

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

→ CN1002 (CONTROL Board) to CN4002

         (DRIVE Board)
2. Check the soldering condition of IC4006
    and its surrounding parts.
3. Check the following signals on the
    DRIVE Board.

a. IC4006-1st and 2nd pins (PHA and PHB):

        See Fig. 6.

b. IC4006-24th pin (VREF): 2.3V or less.

4. Check the soldering condition of IC0015
    on the CONTROL Board to repair it.
5. Replace faulty parts or boards.

9. Paper Feed Roller module or
    DFP Roller is not assembled 
    properly.

Refer to the 1st item on Classified Code U11.

10. Rollers (Paper Feed,
      Separation, DFP) are dirty.

Refer to the 2nd item on Classified Code U11.

11. Rollers have reached their life
      expectancy.

Refer to the 3rd item on Classified Code U11.

U13 (Conveyor Jam2: 
Paper did not reach the 
Starting Sensor.) 

13

00

00

00 1. Document remains between

Starting Sensor and Slip Detect
Sensor.

Remove the document from the scanner.

2. Paper dust exists on or around
    Starting Sensor.

1. Blow off the dirt with the accessory blower.
    (See Sec.7.)
2. Execute Key/Sensor and Sensor Sensitive
    Level tests in Sec. 9.3.6 to check the sensor
    condition.