KV-S4065CL, KV-S4065CW, KV-S4065CWCN, KV-S4085CL, KV-S4085CW, KV-S4085CWCN - Panasonic Other Service Manuals Service Manual (repair manual). Page 124

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2. Front Door is not closed firmly.

Close the door firmly.

3. One of the rollers (Paper Feed,
Separation, DFP, Drive, Exit, or
Free) is dirty.

1. Clean the roller.
2. Clear the counter for cleaning roller to zero
     with the Service Utility described in Sec. 9. 

4. A roller (Paper Feed,
Separation, DFP, Drive, or Exit)
swells irregularly

1. Replace the roller.
2. After replacing Paper Feed, Separation, and
   DFP Rollers, clear the counter for replacing
   roller to zero with the Service Utility
   described in Sec. 9.

5. Paper dust exists on or around
   one of the Skew Sensors.

Clean the sensor surface.

6. The Skew (L) Sensor does not
work correctly.

1. Execute “Key/Sensor” test in the Sec. 9.3.6
     to check the sensor condition.
2. Check the sensor alignment is proper
   (whether the sensor direction faces its
    reflector.)
3. Check the following connections and
     soldering condition on each connector.
    a. CN3011(DOUBLE FEED DETECTOR
        LCR Board) to CN2012(RELAY UPPER
        Board)
    b. CN2008 (RELAY UPPER Board) to
         CN1015(CONTROL Board
4. Check the following signal.
 a. SKEW_L signal (CN2012-6th pin) 
       

→

 0 V (when none exists on the

              SKEW_L Sensor)
 b. Check the reference signal for the SKEW_L
      signal on the CONTROL Board.
            IC1016-6th pin: 1.5 V or less
            IC1019-5th pin: Approx. 1.5 V
 c. Check comparator output signal.
    

→

 IC1019-7th pin: 3.3 V (when no document

          exists)
5. Replace faulty parts or boards.

7. The Skew (R) Sensor does not
work correctly.

1. Execute “Key/Sensor” test in the Sec. 9.3.6
     to check the sensor condition.
2. Check the sensor alignment is proper.
    (whether the sensor direction faces its
      reflector.)
3. Check the following connections and
    soldering condition on each connector.
    a. CN3011 (DOUBLE FEED DETECTOR
        LCR Board) to CN2012 (RELAY UPPER
        Board)
    b. CN2008 (RELAY UPPER Board) to
          CN1015 (CONTROL Board)
4. Check the following signals.
 a. SKEW_R signal (CN2012-3rd pin)
       

→

 0 V (when none exists on the

                     SKEW_R Sensor)
 b. Check the reference signal for the SKEW_R
     signal on the CONTROL Board.
            IC1016-2nd pin: 1.5 V or less
            IC1019-3rd pin: Approx. 1.5 V
 c. Check comparator output signal.
   

→

 IC1019-1st pin: 3.3 V (when no document

        exists)
5. Replace faulty parts or boards.

8. The Roller Pressure Sensor is
    not adjusted properly.

Same as the 11th item in U11

U23 (Double-feed
error)

1C

00

xx

xx

1. Document quality is out of spec.
on this scanner.

1. Set the correct documents on the Hopper
according to this scanner specification.
       Note: Refer to Sec.2.

2. ADF is in MANUAL position.

1. Push "ADF Select Key" to change ADF to
 "AUTO".
2. Execute scanning again.