Samsung SCX 4520, SCX-4521F, SCX4720F Alignment & Adjustment

Alignment & Adjustments

Service Manual

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Samsung Electronics

6. Alignment and Adjustments

This chapter describes some of the main service procedures including: Using the EDC mode; Clearing paper jam and test patterns. Much of this chapter is also included in the user's guide.

6.1 Paper path

Scanner Part

PTL

TR FR

OPC

L S U

Fuser

Toner Cartridge

Sensor-DocSensor-DocSensor-Doc

ADF-Roller

Pickup-Roller

Exit-Roller

Doc-Paper(30Sheets)

ADF-Idle Roller

Sensor-RSensor-Regigi

Feed-Roller

CCD-Module

White-Sheethite-SheetWhite-Sheet

Sensor-Regi

Sensor-ScanSensor-ScanSensor-Scan

Engine Part

Service Manual

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Samsung Electronics

6.1.1 Copy & Scan Document Path

6.1.2 Printer Paper Path

1) After receiving a print command, the printer feeds paper from the main cassette or manual feeder as required.

2) The paper being fed passes the paper feed sensor. (Jam 0 occurs if the sensor is not operated within a certain time)

3) Having passed the paper feed sensor the paper moves to the paper exit sensor via printing process. (Jam 1 occurs if the sensor is not operated within a certain time)

4) The paper then passes through the paper exit sensor and out of the set. (Jam 2 occurs if the trailing edge of the paper does not pass the exit sensor within a certain time of the paper leading edge activating the exit sensor)

Scanner Part

CCD-Module

White-SheetWhite-Sheet

5 6 7

Sensor - Scan

Sensor - Regi

Feed Roller

Exit Roller

1 2 3 4

Doc. Paper (50 Sheets)

Pickup Roller

ADF Roller

Sensor - Doc.

Engine Part

1 2 3 4

Paper Input (Cassette)

Paper Input (Manual Feeder)

Paper Out (Face Down)

5 6 7

Paper Empty Sensor (Cassette)

Paper Feeding Sensor

Paper Exit Sensor

Paper Empty Sensor (Manual)

PTL

TR FR

OPC

L S U

Fuser

Toner Cartridge

Alignment & Adjustments

Service Manual

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Samsung Electronics

6.2 Clearing Paper Jams

Occasionally, paper can be jammed during a print job. Some of the causes include:

• The tray is loaded improperly or overfilled.

• The tray has been pulled out during a print job.

• The front cover has been opened during a print job.

• Paper was used that does not meet paper specifications.

• Paper that is outside of the supported size range was used.

If a paper jam occurs an error message appears in the LCD display. Find and remove the jammed paper. If you don't see the paper, open the covers. Do not use a tweezers, pincers or other metal tools when clearing a paper jam. This could damage the internal mechanism causing print quality problems or possibly electrical shock.

Document Jam

(in the ADF area)

PTL

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT Sensor

Feed

Sensor

MP Sensor

Paper Jam0

(in the paper feed area)

PTL

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT Sensor

Feed

Sensor

MP Sensor

Paper Jam1

(in the fuser area or around the toner cartridge

)

PTL

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT Sensor

Feed

Sensor

MP Sensor

Paper Jam2

(in the paper exit area)

PTL

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT Sensor

Feed

Sensor

MP Sensor

MP Tray Jam

(in the manual feed area)

ADF-Idle Roller

Sensor-Regi

Feed-Roller

ADF-Roller

Sensor-ScanSensor-Scan

White-SheetWhite-Sheet

Pickup-Roller

Sensor-DocSensor-Doc

Doc-Paper(30Sheets)

Exit-Roller

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Samsung Electronics

6.2.1 Clearing Document Jams

If a document jams while it is feeding through the ADF (Automatic Document Feeder),“DOCUMENT JAM ” appears on the display.

6.2.1.1 ADF Input Misfeed

1) Open the ADF top cover.

2) Pull the document gently to the right and out of the ADF.

3) Close the ADF top cover. Then load the documents back into the ADF.

NOTE : To prevent document jams, use the document

glass for the thick, thin or mixed documents.

Alignment & Adjustments

Service Manual

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Samsung Electronics

1) Open the document cover. 2) Turn the release knob so that you can easily remove the misfed document, and remove the document from the ADF or the feed area by carefully pulling it towards the right by using both hands.

3) Close the document cover. Then load the documents back into the ADF.

6.2.1.2 ADF Exit Misfeed

1) Open the document cover and turn the release knob to remove the misfed documents from the exit area.

2) Close the document cover.Then load the documents back into the ADF.

6.2.1.3 ADF Roller Misfeed

Service Manual

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Samsung Electronics

6.2.2 JAM0 (In the Paper Feed Area)

1) Open and close the front cover.The jammed paper automatically exits the machine. If the paper does not exit,continue to Step 2.

2 Pull the paper tray open.

3) Remove the jammed paper by gently pulling it straight out.

If there is any resistance and the paper does not move when you pull or if you cannot see the paper in this area, skip to the fuser area around the toner cartridge.

4) Insert the paper tray into the machine until it snaps into place.

5) Open and close the front cover to resume printing.

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Service Manual

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Samsung Electronics

6.2.3 JAM1 (In the Fuser Area or Around the Toner Cartridge Area)

NOTE : The fuser area is hot. Be careful when removing paper from the machine.

1) Open the front cover and remove the toner cartridge.

2) Remove the jammed paper by gently pulling it straight out.

3) Replace the toner cartridge and close the front cover. Printing automatically resumes.

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Alignment & Adjustments

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Samsung Electronics

6.2.4 JAM 2 (In the Paper Exit Area)

1) Open and close the front cover. The jammed paper automatically exits the machine. If the paper does not exit, continue to Step 2.

2) Gently pull the paper out of the front output tray.

3) If there is any resistance when you pull the paper or

the paper is not seen in the front output tray, open the rear cover.

4) Remove the jammed paper by gently pulling it straight out..

5) Close the rear cover.

6) Open and close the front cover to resume printing.

+ 16 hidden pages