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77

LED does not light
up.

1. Power cord is not inserted correctly

Insert the power cord correctly.

2. Cables in the scanner are not connected

properly. (especially around Power Supply)

Insert the cables properly.

3. Power circuit (including a safety circuit) does

not work, properly.

1.Check the power supply.

(1) CN3-1pin:+12V
(2) CN3-4, 6, 7pin:+24V

2.Check the connection between the Main Board

and Power Supply.

3.Replace Power Supply.

4. FAN does not rotate.

1.Try to rotate the FAN, manually.
2.Check the power supply to the FAN.

(1) CN14-1pin:+24V

3.Replace the FAN.

5. PANEL Board does not work properly.

1. Check the following connection.

(1) between CN5001(Panel SW Board) and

  CN11 (Main Board)

2. Monitor the following signals on the CN5001.

(1) CN5001 pin12 : 0V  during Power SW ON
(2) IC5001-5pin:+3.3V

3. Check the soldering condition of the following

parts on the PANEL Board.
(1) CN5001
(2) IC5000

4. Replace faulty parts or PANEL Board.

6. DC ON/OFF circuit on Main Board does not

work correctly.

1. Monitor the following signals on Main Board.

(1) Q31-C Typ. 10 V (when turning on the power)
(2) Q32-B Typ. 0.6 V
    (when turning on the power)
(3) C838 of IC59 Typ. 3.3 V

 (when turning on the power)

2.Check the soldering condition of the following 

parts and of their surrounding circuits on the
Main Board.

Q31,Q32,IC59

3. Replace faulty parts on Main Board.

7. Main Board does not work properly.

1. Check whether all connections (all connectors on 

the Main Board and cables to the Main Board)
are normal.

2. Check the soldering condition of the following 

parts and of their surrounding circuits on the
Main Board.
(1) 3.3VCPU    Typ. 3.3V (IC59)
(2) 1.2VCPU    Typ. 1.2V (IC62)
(3) 3.3VSLP    Typ. 3.3V (IC58)
(4) IC5 (CPU)
(5) IC1 (Reset IC)

3.Check the soldering condition of the following 

parts on the Main Board.
(1) CN11

4. Monitor the following signals on  CN11.

(1) CN11-1pin:+12V typ.

5. Replace faulty parts or Main Board.

Scanne

r does not 

recognize USB connection.

1. USB cable is not connected normally.

1.Check the device (USB) condition of PC with

Device Manager.

2.Re-attach the USB cable, and then restart the

scanner and PC.

3.Replace the USB cable
4.Check if the USB connector (JK1) has any 

damage.

2. USB interface circuit does not work.

1. Check the soldering condition of the following 

parts and of their surrounding circuits on the
MAIN Board, and then repair it.
(1) JK1 (USB IF connector)
(2) LF1, LF3 (Common mode filter)
(3) IC42 (Common mode filter)

2. Replace the MAIN Board.

78

START/STOP Button, Skip 
Button, or Cursor Button 
don't work properly.

1. Mechanical problem with ON/OFF switch.

1. Perform the “Key/Sensor” test in the 

Sec.10.3.7. to check the button's ON/OFF status.

2. Check the  contact between the button cover and 

switch
(RM5000 [Start/Stop] on PANEL SW Board)
(RM5001 [Skip] on PANEL SW Board)
(RM5002 [Up] on PANEL SW Board)
(RM5003 [Down] on PANEL SW Board)
(RM5004 [Left] on PANEL SW Board)
(RM5005 [Right] on PANEL SW Board)
(RM5006 [

OK] on PANEL SW Board)

3.Check the button's ON/OFF mechanical condi-

tion.

4. Re-attach the button cover after checking

whether it is broken.

5. Replace faulty parts.

2. ON/OFF monitor circuit does not function.

1. Check the soldering condition of the following 

parts and of their surrounding circuits on the
PANEL SW Board.
(1) RM5000,R5006
(2) RM5001,R5007
(3) RM5002,R5008
(4) RM5003,R5009
(5) RM5004,R5010
(6) RM5005,R5011
(7) RM5006,R5012

2. Check the  following connection.

(1) Between CN5001 ( PANEL SW Board) and
     CN11 (Main Board)
(2) FFC Cable
(3) Between CN5000 ( PANEL SW Board) and 
     CN5002 (PANEL LCD Board)

3.Check the soldering condition of the following 

parts and their surrounding circuits on the Main
Board.
(1) CN11

4. Check the following signals on the PANEL

Board.
(1) IC5000

5. Replace faulty parts or boards.

Scanning position is 
shifted.

1. After replacing or re-assembling the CIS

assembly and/or mechanical parts related to
conveying documents, re-adjustment of
scanning position has not been done.

1. Perform the “All Position” and/or “Individual

Position” in the Sec. 10.3.8. so that the scan-
ning position can be adjusted properly.

2. The CIS assembly is not installed properly.

1. Re-assemble the CIS Assembly. (See Disassem-

bly and Assembly Instructions (P.39 and P.47)

The document skews when
scanned

1. Document Guides are not set properly

according to the size of documents on the
Feed Tray.

1.Slide and set the Document Guides according to 

the document size.

2. ADF Door is not closed tightly.

1.Close the door until it clicks into place, after open-

ing it.

3. Rollers are dirty.

1. Clean the rollers with the roller cleaning paper.
2. After cleaning the Paper Feed Roller and DFP 

Roller, perform the “Clear Counter (After Clean
Roller)” in the Sec.10.3.6. to clear the cleaning
roller counter.

4. Rollers are not properly installed into their

default positions when re-assembling.

1. Check the roller attachments to the scanner

(whether a gap between roller and conveyor is
secured equally)

2. Re-attach the rollers to their default positions.

5. Rollers have reached their life expectancy.

1. After checking the configuration, replace the roll-

ers

2. After replacing the Paper Feed Roller and Dou-

ble-feed Prevention Roller, perform the “Clear
Counter (After Replace Roller)” in the
Sec.10.3.6. to clear the roller replacement coun-
ter.

79

Scanned image data have 
black lines, white lines, or 
darker image than the orig-
inal

1. The dust exists on the Scanning Glass ((F) 

or (B)) or its surrounding (Reference area or 
others). 

1.Wipe off the dust with soft and dry cloth.
2.Perform the "Focus" in the Sec. 10.3.7. to 

monitor the CIS's output level.

2. Shading data stored in Main board is not 

proper to perform an image process. 

1. Perform the "Shading" in the Sec.10.3.8.  to 

over-write new data.

3. Problem with Pixel data from CIS (F) or from 

image processing circuit. 

1.Check the connection and soldering condition of 

the following parts.
(1) between CIS (F) and CN2100 
     (CIS Relay Board)
(2) between CN2101(CIS Relay Board) and CN4 
     (Main Board)

2. Check the soldering condition of the following 

parts and their surrounding circuits on the Main 
Board.
(1) IC16 (AFE)
(2) R138, R139, R140, R141, R142, R143

3. Monitor the following CIS Timing signals on the 

CN4.
(1) FCLK: 10MHz
(2) FSP:52.8

s period (300dpi) 

       96.6

s period (600dpi)

4. Replace faulty parts or boards. 

4. Problem with Pixel data from CIS (B) or from 

the image processing circuit. 

1.Check the connection and soldering condition of 

the following parts.
(1) between CIS (B) and CN6 (Main Board)

2. Check the soldering condition of the following 

parts and their surrounding circuits on the Main 
Board.
(1) IC22 (AFE)
(2) R314, R315, R316, R317, R318, R319

3. Monitor the following CIS Timing signals on the 

CN6.
(1) FCLK: 10MHz
(2) FSP:52.8

s period (300dpi) 

       96.6

s period (600dpi)

4.  Replace faulty parts or boards. 

Noise

1. Problem with the Paper Feed Motor 

1. Perform the "Feed Motor" test in the Sec. 

10.3.7.to check the sound.

2. Replace faulty parts.

2. Problem with the Conveyor Motor 

1. Perform the "Conveyor Motor" test  in the Sec. 

10.3.7. to check the sound.

2. Replace faulty parts.

3. Problem with the Exit Motor 

1. Perform the "Exit Motor" test in the Sec. 10.3.7. 

to check the sound.

2. Replace faulty parts.

4. Problem with the Platen Motor 

1. Perform the "Platen Motor" test in the Sec. 

10.3.7. to check the sound.

2. Replace faulty parts.

80

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.9.2.
2. Clear counter for cleaning roller to zero with
     the service utility's operation in the Sec. 

10.3.6.

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. 
9.2.

2. Execute Key / Sensor and Sensor

Sensitive Level tests in the Sec. 10.3.7. to    
check the sensor condition.

Paper Feed 
Roller

Drive Roller 3

Drive 
  Roller 2

Conveyor Motor

Paper 
Sensor

Drive Roller 1

Starting 
Sensor

Paper Feed 
     Motor

Exit Roller 

Exit Motor

U-Turn Path

Waiting 
Sensor

CIS [B]

CIS [F]

Double Feed 
Detector[G]

Gate

DFP Roller

Separation 
Roller

Straight Path

Jam Sensor

Ending Sensor

U11

U12

U13

U14

U16

U16