U14 - Philips KV-S5055C Service Manual

Error Code
Classified Code ST1 ST2 ST3 ST4
U14 (Conveyor Jam3: 14
Paper did not reach the
Exit Sensor.
Possible Cause
3. Starting Sensor does not work,
correctly.
4. Mechanical problem (Drive
Rollers, Drive Belt)
00 00 00 1. Document remains between
Starting Sensor and Exit Sensor.
2. Paper dust exists on or around
the Exit Sensor.
Check Point
1. Execute Key/Sensor test in the Sec. 9.3.6 to
check the sensor condition.
2. Check the sensor alignment is proper.
(whether the sensor direction faces to
its reflector)
3. Check the following connection and
soldering condition on each connector.
a. CN2014 (STARTING SENSOR Board)
to CN2008 (USS RELAY Board)
b. CN2006 (USS RELAY Board)
to CN1008 (CONTROL Board)
4. Check the following signals.
a. STARTING signal (CN2008-1st pin,
CN1008-2nd pin)
→ 0 V (when nonexistence on the
Starting Sensor)
b. Check the reference signal for the
STARTING signal on the CONTROL
Board.
→ IC0023-3rd pin: 1.5 V or less
→ IC0025-2nd pin: Approx. 1.5 V
c. Check comparator output signal.
→ IC0017-8th pin: 3.3 V
(when no document exists)
5. Replace faulty parts or boards.
1. Check the Starting Sensor's mechanical
position and its status.
2. Execute Conveyor Motor test in Sec. 9.3.6
to check the mechanical condition.
3. Check whether the Drive Rollers (1 and 2),
and Drive Belt, and also check whether the
conveyors to support the Drive Rollers are
put together into the scanner, properly.
4. Check the surfaces of the Drive Rollers (1
and 2).
a. Configuration:
Do the rollers swell irregularly?
→ Replace the rollers.
b. Whether the roller surfaces are dirty
→ Clean the surfaces.
5. Check whether the Drive Belt tension is
proper.
→Re-adjust the belt tension.
Remove the document from the scanner.
1. Blow off the dirt with the accessory blower.
(See Sec.7.)
2. Execute Key/Sensor and Sensor Sensitive
Level tests in Sec.9.3.6 to check the sensor
condition.
110
Remarks