KV-S5055C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 110

110

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 connection and
     soldering condition on each connector.

a. CN2014 (STARTING SENSOR Board) 

         to CN2008 (USS RELAY Board)

b. CN2006 (USS RELAY Board)

         to CN1008 (CONTROL Board)
4. Check the following signals.

a. STARTING signal (CN2008-1st pin,

         CN1008-2nd pin)
       

→ 0 V (when nonexistence on the

                Starting Sensor)

b. Check the reference signal for the

        STARTING signal on the CONTROL
        Board.

    

→ IC0023-3rd pin: 1.5 V or less

    

→ IC0025-2nd pin: Approx. 1.5 V

c. Check comparator output signal.
    

→ IC0017-8th pin: 3.3 V

        (when no document exists)
5. Replace faulty parts or boards.

4. Mechanical problem (Drive
    Rollers, Drive Belt)

1. Check the Starting Sensor’s mechanical
    position and its status.
2. Execute Conveyor Motor test in Sec. 9.3.6
    to check the mechanical condition.
3. Check whether the Drive Rollers (1 and 2), 
    and Drive Belt, and also check whether the
    conveyors to support the Drive Rollers are
     put together into the scanner, properly.
4. Check the surfaces of the Drive Rollers (1
    and 2).
     a. Configuration:

    Do the rollers swell irregularly?
     

→ Replace the rollers.

 b. Whether the roller surfaces are dirty
     

→ Clean the surfaces.

5. Check whether the Drive Belt tension is
     proper.
         

→Re-adjust the belt tension.

U14 (Conveyor Jam3: 
Paper did not reach the 
Exit Sensor.

14

00

00

00 1. Document remains between

    Starting Sensor and Exit Sensor.

Remove the document from the scanner.

2. Paper dust exists on or around
    the Exit 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.