KV-S1025C, KV-S1020C - Panasonic Other Service Manuals Service Manual Supplement (repair manual). Page 16

16

Error Code

Possible Cause

Check Point

Classified Code

ST1

ST2

ST3

ST4

U11: Document did 
not reach to the 
Starting Sensor 
position. 
(Document 
remains between 
the Starting Sensor 
and Paper 
Sensor.)
or Double Feed 
occurred around 
paper feed section.

11

00

00

00

1. Rollers (Paper Feed, 
    Double-feed Prevention) are
    dirty.

1. Clean the rollers with Roller Cleaning Paper.
2. Perform the "Feed" test to check paper feed

mechanism.

3. Perform the "Clear Counter" for 

cleaning roller with Service Utility.

2. Paper Feed Roller or 
    Double-feed Prevention Roller is
    not installed properly.

1. Re-attach the roller. (See 7.3.)
2. Perform the "Feed" test in Sec. 9.3.6.

3. Rollers have reached their life
    expectancy.

1. Replace the Paper Feed and 

Double-feed Prevention Rollers after checking each 
roller configuration and scanner counter of Service 
Utility.

2. Perform the "Feed" test in Sec. 9.3.6.
3. After replacing the Double-feed Prevention Roller

 Paper Feed Roller, perform the "Clear Counter

"in the service utility to

 clear the roller replacement counter. (See 9.3.4.)

4. ADF Door is not closed tightly.

1. After opening the door, close it slowly until it clicks into 

place.

5. Starting Sensor's arm does
    not work properly.

1. Perform the "Key / Sensor" test in Sec. 9.3.6 to 

check the sensor condition.

2. Check whether lay-out between the 

arm and Starting Sensor is proper.
→ Doesn’t the arm deviate from its default position?

6. Conveyor Motor or mechanical
    parts (gear and others) do not
    work properly.

1. Perform the "Conveyor Motor" test or "Feed" test in 

Sec. 9.3.6 to check whether the motor rotation is 
transmitted to the Paper Feed Roller properly.
And check the gears' (that will transmit the motor rota-
tion) configuration.

2. Check and adjust the motor’s belt tension.
3. Check the following connection and 

soldering condition.
(1) CN1006 (CONTROL Board) 
      to Conveyor Motor

4. Monitor the following signals.

CN1006- 1, 2, 3, and 4th pins
  (See Fig. 10.2.1 to Fig. 10.2.4.)
CN1006- 5th and 6th pins: 16 V

5. Replace faulty parts or board.

7. Conveyor Motor's control circuit
    does not work properly.

1. Perform the "Conveyor Motor" test or "Feed" test in 

Sec. 9.3.6 to check the motor rotation.

2. Check the soldering condition of IC1015, CN1006, 

and its surrounding circuit on the CONTROL Board to 
repair it.

3. Monitor the following signals on the CONTROL 

Board.
(1) IC1015- 7, 8, 9, 11, and 12th pins 
       : See Fig. 10.2.5 to Fig. 10.2.9.
(2) CN1006- 1, 2, 3, and 4th pins
       : See Fig. 10.2.1 to Fig. 10.2.4.
(3) CN1006- 5th and 6th pins: + 16V (DC)

4. Check the soldering condition of the 

following parts and of their surrounding circuit on the 
CONTROL Board.
(1) IC1007 (252, 253, 254, and 255th pins)
(2) IC1016 (85th pin)

5. Replace faulty parts or CONTROL Board.

8. Scanned document is out of
    specifications on this scanner.
    (Document out of specified size,
    thickness, and weight)

1. Set document in specifications.