KV-S8147, KV-S8127, KV-S8150, KV-S8130, KV-S8120 - Panasonic Other Service Manuals Service Manual (repair manual). Page 105

105

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

14

00

00

00 1. Document remains between

    Starting Sensor and Jam Sensor.

Remove the document from the scanner.

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

1. Clean up the dirt with cleaning paper or 

 cotton swab or soft and dry cloth. 
(See Sec. 9.)

2. Execute “Key/Sensor” tests in Sec. 10.3.7. 

and “Sensor sensitive level”  in Sec. 
10.3.8. to check the Jam Sensor condition.

3. Jam Sensor does not work,  

correctly

1. Execute “Key/Sensor” test in the Sec. 

10.3.7. to check the sensor condition.

2. Check the mounting of the lens of the Jam 

Sensor.

3. Check the following connection and 

soldering condition on each connector. 
    CN5190 (JAM SENSOR Board) to 
    CN20 (CONTROL Board) 

4. Check the following signals.

a. Jam Sensor signal CN20-7th pin:   
    Approx. 5 V (no paper on the sensor) 
b. Check the reference signal for the Jam 
    Sensor signal on the CONTROL Board.
    IC42-5th pin: Approx. 2.5 V
c. Check comparator output signal.
    IC42-7th pin: 5 V (no paper on the sensor)

5. Replace faulty parts or cables.

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

1. Check the arrangement and on/off status of 

the Jam Sensor.

2. Execute “Conveyor motor” test in Sec. 

10.3.7. to check the mechanical condition. 

3. Check whether the Drive Rollers (2 to 4), 

Drive Belt, and the conveyor to support the 
Drive Rollers  (2 to 4) are put together into 
the scanner, properly.

4. Check the surfaces of the Drive Rollers 

 (2 to 4).
a. If it is deformed
    

 Replace the roller.

b. If the surface is dirty
    

 Clean the surface.

5. Check whether the Drive Belt tension is 

proper.
 Re-adjust the belt tension.

U15 (Conveyor Jam4: 
Paper did not reach the 
Exit Sensor.

15

00

00

00 1. Document remains between 

Jam Sensor and Exit Sensor.

Remove the document from the scanner.

2. Paper dust exists on or around 

the Exit Sensor.

1. Clean up the dirt with cleaning paper or 

cotton swab or soft and dry cloth.
 (See Sec. 9.)

2. Execute “Key/Sensor” tests in Sec. 10.3.7. 

and “Sensor sensitive level”  in Sec. 
10.3.8. to check the Exit Sensor condition.

3. Exit Sensor does not work, 

correctly

1. Execute  “Key/Sensor” test in the Sec. 

10.3.7. to check the Sensor condition.

2. Check the mounting of the lens of the Exit 

Sensor.

3. Check the following connection and 

soldering condition on each connector. 
CN5060 (EXIT SENSOR Board) to 
CN22 (CONTROL Board)

4. Check the following signals.

a. Exit Sensor signal CN22-1st pin:   
    Approx. 5 V (no paper on the sensor) 
b. Check the reference signal for the Exit 
    Sensor signal on the CONTROL Board.
    IC42-3rd pin: Approx. 2.5 V
c. Check comparator output signal.
    IC42-1st pin: 5 V (no paper on the sensor)

5. Replace faulty parts or cables.