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105

U1X(Paper Jam)

Hold the document before opening the ADF Door when a paper jam error occurred, 
to get the stop position of the document.

U11(Paper feed jam: 
Paper did not reach the 
Waiting Sensor)

11

00

00

00 1. Paper Feed Roller module or 

DFP Roller is not assembled 
properly.

1. Reassemble the rollers.
2. Check the paper feed mechanism from the
    Paper Feed Motor's gear to Paper Feed
    Roller's gear.

2. Rollers (Paper Feed, 

Separation, DFP) are dirty.

1. Clean the rollers in the Sec.8.2.
2. Clear counter for cleaning roller to zero with
     the service utility's operation in the 

 Sec. 9.3.6.

3. Rollers have reached their life 

expectancy.

1. Replace the Paper Feed, Separation, and 
    DFP Rollers after checking each roller 
    configuration and Scanner Counter of 
    Service Utility software.
2. Clear counter for replacing roller to zero with
     the above service utility.

4. Paper dust exists on or around 

the Waiting Sensor.

1. Clean up the dirt with cleaning paper or 

cotton swab or soft and dry cloth in the 
Sec. 8.2.

2. Execute “Key / Sensor” tests in the Sec. 

9.3.7. to    check the sensor condition.

5. Waiting Sensor does not work 

correctly.

1. Execute “Key/Sensor” test in the Sec. 

9.3.7. to check the sensor condition.

2. Check  the sensor alignment is proper 

(whether the sensor direction faces to its 
reflector.) 

3. Check the  following connections and solder-

ing condition on each connector :
a. CN9 (WAITING SENSOR Board) to CN17 

(OUTER CONVEYORRELAY Board)

b. CN20 (OUTER CONVEYORRELAY 

Board) to CN515 (MAIN Board)

4. Check the following signals.

a. Check the reference signal for the 

WAITING signal on the MAIN Board.
IC544-2nd pin: 1.5 V or less
IC544-3rd pin: Approx. 1.5 V  

b. Check comparator output signal.

 IC544-1st pin:
     Approx. 3.3V(no paper)

5. Replace  faulty parts or cables.

6. Paper Feed Motor does not work

properly.

1. Check the motor mechanism condition by
    carrying out Feed Motor test in Sec. 9.3.7.
2. Check the following connection and
    soldering condition on each connector.

a. Paper Feed Motor to CN38(POWER 

RELAY Board)

b. CN34 (POWER RELAY Board) to CN404 

(DRIVE Board)

3. Check the following signals on the DRIVE 

Board.
 CN404-9, 11, 12, and 14th pins:
     See Fig. 10.2.1.

4. Replace faulty cables.
5. Replace Paper Feed Motor. 

106

7. Paper Feed Motor control circuit 

does not work, properly. 

1. Check the following connections and solder-

ing condition on each connector.
a. CN402 (DRIVE Board) toCN512 (MAIN  

Board)

2. Check the soldering condition of IC405 and 

its surrounding parts

3. Check the following signals on the DRIVE 

Board:
a. IC405-12th pin (CLK) See Fig. 10.2.2.
b.  IC405-19th pin (VREF): 1.8 V orless
c.  IC405-15th pin (ENABLE): 3.3 V

(when executing Feed Motor test)

4. Check the soldering condition of IC524 on 

the MAIN Board to repair it.

5. Replace faulty parts or boards.

U12 (Conveyor Jam1:
ST2 00 
Paper did not reach the 
Starting Sensor
St2 01
Narrow paper interval)     

12

xx

00

00

1. Document remains between 

Waiting Sensor and Starting 
Sensor.

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 in the 
Sec. 8.2.

2. Execute “Key/Sensor” and “Sensor

Sensitive Level” tests in the Sec.9.3.7. and 
9.3.8. to check the sensor condition.

3. Starting sensor does not work, 

correctly.

1. Execute “Key/Sensor”  test in the Sec. 

9.3.7. 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. CN25 (STARTING SENSOR Board) to

        CN12 (SENSOR RELAY Board)

b. CN16 (SENSOR RELAY Board) to CN514

        (MAIN Board)
4. Check the following signals.

a. STARTING signal (CN25-1th pin, CN16-

14th pin)

     

 0 V (when none exists on the Starting 

Sensor) 

b. Check the reference signal for the

        PHEAD signal on the MAIN Board.
        IC544-6th pin: 1.5 V or less

    IC544-5th pin: Approx. 1.5 V
c. Check comparator output signal.

        

  IC546-7th pin: 3.3 V (when no docu-

ment exists)  

5. Replace faulty parts or boards.

4. Mechanical problem (Drive 

Roller, Drive Belt, Conveyor)

1. Execute “Feed Motor” and “Conveyor 

Motor” tests in Sec. 9.3.7. to check the 
mechanical condition.

2. Check whether the Drive Rollers1, 2, the 
Drive belt, and the conveyor to support the 
Drive Rollers are assembled properly in the 
scanner
3. Check the surfaces of the Drive Roller.
      a. Configuration:
         Are the rollers swollen irregularly?
          

 Replace the rollers.

      b. Whether the roller surface are dirty.
          

 Clean the surface.

4. Check whether the Drive Belt tension is
    proper.
          

 Re-adjust the belt tension.

107

5. Conveyor Motor does not work 

properly.

1. Check the motor mechanism condition by
    carrying out “Conveyor Motor” test.

(Sec. 9.3.7.)

2. Check the following connection and 
    soldering condition on each connector.
    

 Conveyor Motor to CN37

          ((POWER RELAY Board)
3. Check the following signals on the DRIVE

 Board.
 

 404-3, 5, 6, and 8th pins:See Fig. 10.2.3.

4. Replace faulty cables.
5. Replace Conveyor Motor. 

6. Conveyor Motor circuit does not 

work properly.

1. Check the following connection and solder-

ing condition on each connector.
a. CN402 (DRIVE Board) to CN512 (MAIN  

Board)

2. Check the  soldering condition of IC404 and 

its surrounding parts
a. IC404-12th pin (CLK) See Fig. 10.2.4. 
b. IC404-19th pin (VREF): 1.8V or less.
c. IC404-15th pin (ENABLE): 3.3 V

(when executing Feed Motor test)

3. Replace faulty parts or boards.

7. Paper Feed Roller module or 

DFP Roller is not assembled 
properly.

Refer to the 1st item on Error Code U11.

8. Rollers (Paper Feed, Separa-

tion, DFP) are dirty.

Refer to the 2st item on Error Code U11.

9. Rollers have reached their life 

expectancy.

Refer to the 3st item on Error Code U11.

U14 (Conveyor Jam3:
Paper did not reach the 
Ending Sensor.

14

00

00

00 1. Document remains between

Starting Sensor and Ending 
ensor.

Remove the document from the scanner.

2. Paper dust exists on or around
    the Ending Sensor.

1. Clean up the dirt with cleaning paper or 

 cotton swab or soft and dry cloth in the 
Sec. 8.2.

2. Execute “Key/Sensor” and “Sensor Sensi-

tive Level” tests in the Sec. 9.3.7. to check 
the sensor condition.

3. Ending Sensor does not work,  

correctly

1. Execute “Key/Sensor” test in the Sec. 

9.3.7. to check the sensor condition.

2. Check the sensor alignment is proper 

(whether the sensor direction faces to its 
reflector.)

3. Check the following connections and solder-

ing condition on each connector. 
a. CN26 (ENDING SENSOR Board) to CN11 

(SENSOR RELAY Board) 

b. CN16 (SENSOR RELAY Board) to CN514 

(MAIN Board)

4. Check the following signals:

a. PEXIT signal 

(CN26-2nd or CN16-17th pin) 

     

 0 V (when none exists on the Ending 

Sensor) 

 b. Check the reference signal for the
     PEXIT signal on the MAIN Board.
     IC545-2nd pin: 1.5 V or less
     IC545-3rd pin: Approx. 1.5 V
c. Check comparator output signal.
     

 547-1st pin: 3.3 V (when no document 

exists) 

5. Replace faulty parts or cables.

108

4. Mechanical problem (Drive
    Rollers, Drive Belt, Conveyor)

1. Execute “Conveyor Motor” test in the Sec. 

9.3.7. to check the mechanical condition.

2. Check whether the Drive Rollers (2, 3), 
    Drive Belt, and the conveyor to support 
    the Drive Rollers are put together into 
    the scanner, properly.
3. Check the surfaces of the Drive Rollers
    (2, 3).
    a. Configuration:

    Do the rollers swell irregularly?
     

 Replace the rollers.

b. Whether the roller surfaces are dirty
     

 Clean the surfaces.

4. Check whether the Drive Belt tension is
    proper.

U16 
(Exit Jam1: Paper did 
not pass through the 
Ending Sensor)

16

00

00

00 1. Document remains forward

    Ending Sensor.

Remove the document from the scanner.

2. Paper dust exists on or around

the Ending Sensor or Starting 
Sensor.

1. Clean up the dirt with cleaning paper or 

cotton swab or soft and dry cloth in the 
Sec. 8.2.

2. Execute “Key/Sensor” and “Sensor Sensi-

tive Level” tests in the Sec.9.3.7. to check 
the sensor condition.

3. Mechanical problem (Exit Roller,
    Drive Belt, Conveyor)

1. Execute “Conveyor Motor” test in the Sec. 

9.3.7. to check the mechanical condition.

2. Check whether the Drive Rollers (3, 4), Exit 

Roller, Drive Belt, and the conveyor to sup-
port the rollers are assembled properly in the 
scanner.

3. Check the surfaces of the Drive Rollers (3, 

4), and of the Exit Roller.

    a. Configuration:

    Are the rollers swollen irregularly?
    

 Replace the rollers.

b. Whether the roller surfaces are dirty
    

Clean the surfaces.

4. Check whether the Drive Belt tension is
    proper.
    

 Re-adjust the belt tension.

U18 (Paper remains in
the scanner)

18

xx

00

00 1. Document remains in the 

scanner.

Remove the document from the scanner.

2. Paper dust exists on a sensor.

1. Execute “Key / Sensor” and “Sensor Sen-

sitive Level” tests in Sec. 9.3.7 to define the 
sensor that results in this problem.

2. Clean the dust on the surface of the sensor 

by such as a cotton swab.

3. A sensor does not work 

correctly.

1. Execute “Key / Sensor” and “Sensor Sen-

sitive Level” tests in Sec. 9.3.7 to define the 
sensor that occurs this problem.

2. Check each sensor, its connection, and its 

monitor circuits.

    a. Waiting Sensor

 See the 5th item of “U11”.

    b.  Starting Sensor

 See the 3rd item of “U12”.

    c. ENDING Sensor

 See the 3rd item of “U14”.

U23 (Double-feed 
error)

1C

00

xx

00 1. Document quality is out of spec. 

on this scanner.

1. Set the correct documents on the Feed Tray
    according to this scanner specification.

Note: Refer to Sec.2.

2. Rollers (Paper Feed, 
    Separation, DFP) are not
    assembled, properly.

1. Reassemble the rollers.

3. Rollers (Paper Feed, 
    Separation, DFP) are dirty.

1. Clean the rollers.
2. Clear counter for cleaning roller to zero with
    the above service utility.