KV-S5055C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 112

112

U23 (Double-feed 
error)

1C

00

xx

00 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. Rollers (Paper Feed, 
    Separation, DFP) are not
    assembled, properly.

1. Reassemble the rollers.

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

1. Clean the rollers.
2. Clear counter for cleaning roller to zero with
    the above service utility. 

4. Rollers have reached their life
    expectancy.

1. Replace the Paper Feed, Separation,
    and DFP Rollers after checking each
    roller configuration and Scanner Counter
    of Service Utility software.
2. Clear counter for replacing roller to zero with 
    the above service utility.

5. Double Feed Detector (G) does
    not work, properly.

1. Execute Double Feed test in Sec. 9.3.7 to
    adjust "Send Level” for Double Feed
    Detectors.
2. Execute Double Feed test in Sec. 9.3.6 to
    check the detector condition.
3. Check whether the Double Feed Detector is
    aligned property.
4. Check the following connection and 
    soldering condition on each connector.

a. CN2011 (USS / WAITING SENSOR

        Board) to CN3009 (BENT RELAY Board)

b. CN3005 (BENT RELAY) to CN2007

        (USS RELAY Board)

c. CN2006 (USS RELAY Board) to CN1008
    (CONTROL Board)

5. Check the following parts' soldering condition
     to repair it.

a. CONTROL Board
    IC0006-43rd pin
    IC0015-21,23,24, and 27th pins)
b. USS RELAY Board
    IC2008-3, 15, 18, 20, 22, 24, and 27th pins
    Q2001 to Q2008 surrounding circuit.

6. Check the following signals

a. DC 24V signal (CN2006-5th pin)
b. JS_CLK (CN2006 9th pin) 

→ 300 kHz

c. USS / WAITING SENSOR USS+

        (CN2011-7th pin) and 
         USS-(CN2011-8th pin) 
           

→ See Fig. 7.

7. Replace faulty parts or boards.