Troubleshooting-2 (According To An Error Message On The Pc) - Panasonic KV-S1025C SERIES Service Manual

10.2. Troubleshooting-2 (According to an error message on the PC)

Error Code
Classified Code ST1
U11: Document did 11 00
not reach to the
Starting Sensor
position.
(Document
remains between
the Starting Sensor
and Paper
Sensor.)
or Double Feed
occurred around
paper feed section.
ST2 ST3 ST4
00 00 1. Rollers (Paper Feed,
Double-feed Prevention) are
dirty.
2. Paper Feed Roller or
Double-feed Prevention Roller is
not installed properly.
3. Rollers have reached their life
expectancy.
4. ADF Door is not closed tightly.
5. Starting Sensor's arm does
not work properly.
6. Conveyor Motor or mechanical
parts (gear and others) do not
work properly.
7. Conveyor Motor's control circuit
does not work properly.
8. Scanned document is out of
specifications on this scanner.
(Document out of specified size,
thickness, and weight)
Possible Cause
80
Check Point
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.
1. Re-attach the roller. (See 7.3.)
2. Perform the "Feed" test in Sec. 9.3.6.
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 and/or Paper Feed
Roller, perform the "Clear Counter
(After Replace Double-feed
Prevention Roller)" and/or "Clear
Counter (After Replace Paper Feed
Roller)" in the service utility to clear the
roller replacement counter. (See 9.3.4.)
1. After opening the door, close it slowly until it clicks into
place.
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?
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.
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.
1. Set document in specifications.