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61
11.2. Troubleshooting-2 (when an error message is displayed on PC)
Error Code
ST1 ST2 ST3 ST4
Possible Cause
Recommended action
Hold the document before opening the ADF Door when a paper jam error occurred, to get the stop position of the document.
U11: Document
did not reach to
the Starting
Sensor position.
(Document
remains
between the
Starting Sensor
and Paper
Sensor.)
U11: Document
did not reach to
the Starting
Sensor position.
(Document
remains
between the
Starting Sensor
and Paper
Sensor.)
11
00
00
00 1. Rollers (Paper Feed, DFP)
are dirty.
1. Clean the rollers with Roller Cleaning Paper.
2. After cleaning the rollers, perform the "Clear
2. After cleaning the rollers, perform the "Clear
Counter (After Clean Roller)" in Sec.
10.3.7.
2. Paper Feed Roller or DFP
Roller is not installed
properly.
properly.
1. Re-attach the roller. (See Sec.
8.3.1. & 8.4.1.)
3. Rollers have reached their
life expectancy.
1. Replace the Paper Feed and DFP Rollers after
checking each roller configuration and scanner
counter of Service Utility.
counter of Service Utility.
2. Perform the "Clear Counter" for replacing roller in
Sec.
10.3.7.
.
4. ADF Door is not closed
tightly.
1. After opening the door, close it slowly until it clicks
into place.
5. Paper dust exists on or
around the Starting Sensor.
1. Clean up the dirt with cotton swab.(See Sec.
9.1.
)
2. Execute "Key / Sensor" test in Sec.
10.3.8.
and
"Sensor Sensitive Level" adjustment in Sec.
10.3.9.
to check the sensor condition.
6. Starting Sensor does not
work correctly.
1. Execute "Key / Sensor" test in Sec.
10.3.8.
and
"Sensor Sensitive Level" test in Sec.
10.3.9.
to
check the sensor condition.
2. Check the sensor alignment is proper. (whether the
sensor direction faces to its Sensor Lens)
3. Check the following connection and soldering
condition on each connector.
(1) CN2301 (STARTING SENSOR Board) to CN14
(1) CN2301 (STARTING SENSOR Board) to CN14
(CONTROL Board)
4. Check the following signals.
a. STARTING input level.
CN14-7th : 2.5 V - 3.3 V
(when nothing on the Starting Sensor)
(when nothing on the Starting Sensor)
b. Check the STARTING LED level.
CN14-6th : 1.9V - 2.6V
5. Replace faulty parts or cables.
7. Conveyor Motor or
mechanical parts (gear and
others) do not work properly.
others) do not work properly.
1. Perform the "Conveyor Motor" test or "Feed" test
in Sec.
10.3.8.
to check whether the motor drives
the Paper Feed Roller through the gears, the
pulleys and the belt properly.
pulleys and the belt properly.
2. Check the following connection and soldering
condition.
CN12 (CONTROL Board) to Conveyor Motor
CN12 (CONTROL Board) to Conveyor Motor
3. Monitor the following signals.
CN12- 1, 2, 3, and 4th pins.
(See
(See
Fig.11.2.3.
)
4. Replace faulty parts or board.
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