KV-S5055C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 111

111

3. Exit 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. CN3003 (ENDING SENSOR Board) 

         to CN2004 (USR RELAY Board)

b. CN2001 (USR RELAY Board)

         to CN1007 (CONTROL Board)
4. Check the following signals.

a. ENDING signal (CN2004-1st or 
    CN1007-4th pin)
    

→ 0 V (when none exists on the

             Exit Sensor)

 b. Check the reference signal for the
     ENDING signal on the CONTROL Board.
     IC0023-5th pin: 1.5 V or less
     IC0025-6th pin: Approx. 1.5 V
 c. Check comparator output signal.
     

→ IC0017-6th pin: 3.3 V (when no

               document exists)
5. Replace faulty parts or cables.

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

1. Execute Conveyor Motor test in Sec.9.3.6 
    to check the mechanical condition.
2. Check whether the Drive Rollers (2, 3), 
    Drive Belt, and the conveyor to support 
    the Drive Rollers are put together into 
    the scanner, properly.
3. Check the surfaces of the Drive Rollers
    (2, 3).
    a. Configuration:

    Do the rollers swell irregularly?
     

→ Replace the rollers.

b. Whether the roller surfaces are dirty
     

→ Clean the surfaces.

4. Check whether the Drive Belt tension is
    proper.

U16 (Exit Jam1: Paper 
did not pass through 
the Exit Sensor)

16

00

00

00 1. Document remains forward

    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.)
2. Execute Key/Sensor and Sensor Sensitive
    Level tests in Sec. 9.3.6 to check the sensor
    condition.

3. Mechanical problem (Exit Roller,
    Drive Belt, Conveyor)

1. Execute Conveyor Motor test in Sec.9.3.6
    to check the mechanical condition.
2. Check whether the Drive Roller (3), Exit
    Roller, Drive Belt, and the conveyor to
    support the rollers are put together into the
    scanner, properly.
3. Check the surfaces of the Drive Roller (3)
    and the Exit Roller.
    a. Configuration:

    Do the rollers swell 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.

U18 (Paper remains in
the scanner)

18

xx

00

00 1. Document remains in scanner.

Remove the document from the scanner.

2. Paper dust exists on a sensor.

1. Execute Key/Sensor and Sensor Sensitive
    Level tests in Sec. 9.3.6 to define the sensor
    that results in this problem.
2. Blow off the dirt on the surface of the sensor
    with the accessory blower. (See Sec.7.2.)