Panasonic KV-S1027C, Service Manual

Page: 62 / 255

62
U16: The trailing
edge of the doc-
ument did not
exit from the
Starting Sensor,
throughout.
or
Double Feed
occurred
between the
Conveyor Roller
and Exit Roller. 16 00 00 00 1. Conveyor Roller, Exit Roller,
or Free Roller is dirty. 1. Clean the roller with Roller Cleaning Paper.
2. Perform the
"Feed" test to check paper feed
mechanism.
2. Conveyor Roller, Exit Roller,
or mechanical parts
(Conveyor, Belt) related to
conveying document are
not installed properly. 1. Check and reassemble the parts.
2. Perform the
"Feed" test to check paper feed
mechanism.
3. Conveyor Roller or Exit
Roller has reached their life
expectancy. 1. Replace the Conveyor Roller or Exit Roller after
checking each roller configuration and scanner
counter of Service Utility.
2. Perform the
"Feed" test in Sec.
Test
(
P.47
).
4. Paper dust exists on or
around the Starting Sensor.
1. Clean up the dirt with cleaning paper or cotton
swab or soft and dry cloth.(See Sec.
Disassembly
Flowchart (P.23))
2. Execute "Key / Sensor" and "Sensor Sensitive
Level" test in Sec.
Test
(
P.47
,
P.51
) to check the sen-
sor condition.
5. Starting Sensor does not
work correctly.
1. Execute "Key / Sensor" test in Sec.
Test
(
P.47
) to
check the sensor condition.
2. Check the sensor alignment is proper (whether the
sensor direction faces to its light guide.)
3. Check the following connection and soldering con-
dition on each connector.
CN2301 (STARTING SENSOR Board) to CN9
(CONTROL Board)
4. Check the following signals
a. STARTING input level. (CN9-7th)

2.5 V - 3.3 V
(when nothing on the Starting Sensor)
b. Check the STARTING LED level on the
CONTROL board.
(1). IC24
(2). IC42
c. Check the STARTING LED level.
(CN9-6th)

1.9V - 2.6V
6. Replace faulty parts or cables.
6. Scanned document is out of
specifications regarding the
length. (Refer to paper
specifications.) Set documents according to the specifications for this
scanner, and try the
"Feed" test in Sec.
Test
(
P.47
).
U18: Document
remains in the
scanner. 18 00 00 00 1. Document remains in the
scanner. Open the ADF Door and remove the document from
the scanner.
2. Paper dust exists on or
around the Starting Sensor.
1. Clean up the dirt with cleaning paper or cotton
swab or soft and dry cloth.(See Sec.
Disassembly
Flowchart (P.23))
2. Execute "Key / Sensor" and "Sensor Sensitive
Level" test in Sec.
Test
(
P.47
,
P.51
) to check the sen-
sor condition.
Error Code Possible Cause Check Point
Classified Code ST1 ST2 ST3 ST4