KV-S7075C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 113

113

U12 (Conveyor
Jam1: Paper did not
reach the Starting
Sensor.) 

12 00 00 00 1. Document remains between

    Waiting Sensor and Starting
    Sensor.

Remove the document from the scanner.

2. Paper dust exists on or
   around the Starting Sensor.

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

3. Starting 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 to its
 reflector)
3. Check the following connections and
    soldering condition on each connector:

     

 a. CN13 (STARTING SENSOR

          Board) to CN12 (SENSOR RELAY
            Board)
      b. CN29 (SENSOR RELAY Board)
            to CN2006 (CENTER Board)
4. Check the following signals:
      a. STARTING signal (CN13-3rd pin,
         CN29-10th pin)
         

→ 0 V (when none exists on the

             Starting Sensor)
      b. Check the reference signal for the
          PHEAD signal on the CENTER
          Board.
            IC2019-6th pin: 1.5 V or less
            IC2019-5th pin: Approx. 1.5 V
      c. Check comparator output signal.
         

→ IC2022-7th pin: 3.3 V (when no

             document exists)
5. Replace faulty parts or boards.

4. Mechanical problem (Drive
    Roller, Drive Belt, Conveyor)

1. Execute "Feed Motor" and "Conveyor
    Motor" tests in Sec. 9.3.6 to check the
    mechanical condition.
2. Check whether the Drive Rollers1, 2,   
    the Drive belt, and the conveyor to
    support the Drive Rollers are
    assembled properly in the scanner.
3. Check the surfaces of the Drive Rollers
     a. Configuration:
       Are the rollers swollen irregularly?
            

→ Replace the rollers.

     b. Whether the roller surfaces are dirty
           

→ Clean the surfaces.

4. Check whether the Drive Belt tension is
    proper.

→

 Re-adjust the belt tension.

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 connections and
    soldering condition on each connector:

       

a. Conveyor Motor to CN3025

       

     (POWER RELAY Board)

      b. CN3021 (POWER RELAY Board)
          to CN4009 (DRIVE Board)
3. Check the following signals on the
    DRIVE Board:
      

→ CN4009-3, 5, 6, and 8th pins:

           See Fig. 10.2.3.
4. Replace faulty cables.
5. Replace Conveyor Motor.