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

Alignment & Adjustments

Service Manual

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Samsung Electronics

6

6

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

P

I

C

K

/

R

PR

CR

DR

SR

TR FR

OPC

L S U

Fuser

Toner Cartridge

1

2

3

4

5

6

8

7

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

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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

1

2

3

4

8

5

6

7

5
6
7

Sensor - Scan

Sensor - Regi

Feed Roller

8

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

P

I

C

K

/

R

PR

CR

DR

SR

TR FR

OPC

L S U

Fuser

Toner Cartridge

1

2

3

4

5

6

7

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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

P

I

C

K

/

R

PR

CR

DR

SR

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

P

I

C

K

/

R

PR

CR

DR

SR

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

P

I

C

K

/

R

PR

CR

DR

SR

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

P

I

C

K

/

R

PR

CR

DR

SR

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

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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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.

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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

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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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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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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.

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6.2.5 MP-Tray Jam (In the Bypass Tray)

“MP Tray Jam” appears on the display when you try to print using the manual feeder and the machine does not
detect paper, due to no paper or improper paper loading.

The error message may also occur when the paper is not properly fed into the machine through the manual feeder.
In that case, pull the paper out of the machine.

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1.Paper Setting

Paper Tray
Paper Size

2.Copy Setup

Change Default
Timeout

6.Reports

System Data

8.Machine Setup

Language
Power Save
CCD Power Save
USB Mode

9.Maintenance

Clean Drum
Clear Memory

6.3 User Mode(SCX-4520)

The table below shows the map of User settings available in User Mode. These are fully described in the
User Guide and are not included here.

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1.Paper Setting

Paper Tray
Paper Size

2.Copy Setup

Change Default
Timeout

3.Fax Setup

Receive Mode
Ring to Answer
Contrast
Redial Term
Redials
MSG Confirm.
Auto Report
Auto Reduction
Discard Size

4.Fax Feature

Delay Fax
Priority Fax
Add / Cancel

5.Advanced Fax

Send Forward
RCV Forward
Toll Save
Junk Fax Setup
Secure Receive
Prefix Dial No
Stamp RCV Name
ECM Mode

6.Reports

Phone Book
Send Report
RCV Report
System Data
Scheduled Jobs
Tx Confirm.
Junk Fax List

7.Sound/Volume

Speaker
Ringer
Key Sound
Alarm sound

8.Machine Setup

Machine ID
Date&Time
Clock Mode
Dial Mode
Language
Power Save
CCD Power Save
USB Mode

9.Maintenance

Clean Drum
Notify toner
Clear Memory

6.3 User Mode(SCX-4720F)

The table below shows the map of User settings available in User Mode. These are fully described in the
User Guide and are not included here.

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6.4 Tech Mode

6.4.1 How to Enter Tech Mode

In service (tech) mode the technician can check the machine and perform various tests to help with failure
diagnosis.

When in Tech mode the machine still performs all normal operations.
While in Tech mode the machine still performs all normal operations.

To enter the Tech mode

To enter the Tech mode press in sequence and the LCD
briefly displays ‘TECH’, the machine has entered service (tech) mode.

6.4.2 Setting-up System in Tech Mode

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6.4.3 Data Setup

SEND LEVEL

You can set the level of the transmission signal. Typically, the Tx level should be under -12 dBm.

Caution : The Send Fax Level is set to the best condition during manufacture. Never change settings arbitrarily.

DIAL MODE

This function can choose the dialing method.
*Default : Dial (Dial/Pulse)

MODEM SPEED

You can set the maximum modem speed.
When the fax establishes communication with a remote set the value of the maximum modem speed is
checked for both transmitter and receiver. The lowest value is used. It is best set at 33.6Kbps, the default
setting.

ERROR RATE

When the error rate is about exceed the set value, the Baud rate automatically adjusts to 2400 bps.
This ensures that the error rate remains below the set value.
You can select the rate between 5% and 10%.

CLEAR ALL MEMORY

The function resets the system to factory default settings.
This function is used to reset the system to the initial value when the product is functioning abnormally.
All the values are returned to the default values, and all the information which was set by the user
will be erased.

< Method >

1. Select the [MEMORY CLEAR] in TECH MODE.

2. Push the ENTER button.

3. Select your country. (There are four country groups. Refer to the table below.)

4. Push the ENTER button then it will clear all memory.

NOTICE : Always perform a memory clear after replacing the main board, otherwise the system may

not operate properly.

Country Group USA/Canada UK Russia Southafrica

USA/Canada UK Russia South Africa
Mexico Germany India
Brazil France Oman

Italy Poland
Spain Bangladesh

Kuwait
Netherlands Moroco
Belgium Algeria

Country Portugal Pakistan

Sweden UAE
Norway Bahrain
Denmark Srilanka
Finland Saudi Arabia
Switzerland Chile
Greece Peru
Ireland Argentina
Turkey Hungary

Romania
Bulgaria
Czech

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Samsung Electronics

FLASH UPGRADE

There are 2 methods to update the Flash Rom, Local and Remote.

(1) Local Machine

• RCP (Remote Control Panel) mode
This method is for Parallel Port or USB Port. Connect the PC and activate the RCP (Remote Control Panel) to
upgrade the Firmware.

< Method >
How to Update Firmware using RCP

1. Connect PC and Printer with a Parallel Cable or a USB Cable.

2. Run the RCP utility and select Firmware Update.

3. Search for the Firmware file to be used to update the set using the Browse Icon.

4. Click the Update icon. The firmware file is transmitted to the Printer automatically and the printer is
initialized when the download completes.

5. Click the Refresh icon and check that the updated version numbers are displayed.

• DOS Command mode
This method is ONLY for Parallel Port. Connect the PC to the set using a Parallel Cable and enter the DOS
Command to upgrade the firmware.

< Method >

1. First of all you need the following files : down.bat, down_com.bin, fprt.exe, and Rom File: (file name for
upgrade). Ensure you save ALLof these files in the same folder.

2. At the DOS prompt enter the correct command (as shown below) and push the enter key.
Then the upgrade will automatically take place..

3. There are two commands use the correct one depending on the condition of the set..

* When the product is in the idle condition

down "rom file"

* When the product is in Ready condition

(TECH MODE --> DATASETUP --> FLASH UPGRADE --> LOCAL)

fprt "rom file"

4. Do not turn off the power during the upgrade process.

(2) Remote FAX

It is possible to use a set that already has the latest firmware to upgrade a remote set remotely using the tele­phone system.

< Method >

1. On the set that has the latest firmware set it toi transmit the upgrade:­(TECH MODE •DAT ASETUP•••• FLASH UPGRADE•••• REMOTE)

2. Enter the telephone number of the set that needs to be upgraded.
(Several faxes can be upgrade at the same time. In this case, enter each fax number.)

3. When the enter button is pressed the set sends the firmware file by calling designated fax number.
(Around 10~15 minutes are needed to send the file.)

< Caution >

1. The Sending and Receiving fax machines MUST be the same model.

2. The sending fax must be set up in ECM mode and the Receiving fax memory must be 100%.
If not the function will not work.

Samsung Electronics

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6.4.4 Machine Test

SWITCH TEST

Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each
time you press a key.

MODEM TEST

Use this feature to hear various transmission signals to the telephone line from the modem and to
check the modem, amplifier and speaker. If no transmission signal sound is heard, it means the
modem part of the main board, amplifier, speaker or speaker harness is faulty.

DRAM TEST

Use this feature to test the machine's DRAM. The result appears in the LCD display.
If all memory is working normally, the LCD shows << O K >>

ROM TEST

Use this feature to test the machine's ROM. The result and the software version appear in the LCD
display.

• FLASH VER : 1.00 V

• ENGINE VER :1.00V

PATTERN TEST

Using this pattern printout you can check that the printer mechanism is functioning properly.
This function is for factory manufacturing use only.

SHADING TEST

The function is used to set the optimum scan quality determined by the specific characteristics of
the CCD (Charge Coupled Device). If copy image quality is poor perform this function to check the
condition of the CCD unit.

< Method >

1. Select the [Shading Test] in TECH MODE
(Menu, #, 1934).

2. Push the ENTER button and an image will
be scanned.

3. After scanning the CCD SHADING PRO­FILE will be print out.

4. If the printed image is different to the sample
image shown the CCD is defective.

NOTICE : When you test the CCD, make

sure that the cover is closed.

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6.4.5 Report

PROTOCOL LIST

This list shows the sequence of the CCITT group 3 T.30 protocol during the most recent sending or receiving
operation. Use this list to check for send and receive errors. If

SYSTEM DATA

This list provides a list of the user system data settings and tech mode settings.

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6.5 Engine Test Mode

The Engine Test Mode supplies useful functions to check the condition of the print engine. It tests the con­dition of each device and displays the result of the test on the LCD. It is divided into 5 functions (0~4), and
these are shown below.

6.5.1 To enter the Engine Test Mode

To enter the Engine Test mode

Press in sequence, and the LCD briefly displays
‘Engine Test’, the machine has entered Engine Test Mode.

Press “0”, “1”, “2”, “3” or “4” to select the Test No. (see list below – left hand column)

6.5.2 Diagnostic

NO. Sub No. Engine test Remark

0 1 Motor Test 1 : On, 2 : Off – next test selected

2 Pick Up Test 1 : On, 2 : Off – next test selected
3 Fan Test 1 : On, 2 : Off – next test selected
4 Manual Clt Test 1 : On, 2 : Off – next test selected
5 PTL Test 1 : On, 2 : Off – next test selected

1 1 LSU Motor Test 1 : On, 2 : Off – next test selected

2 LSU Hsync Test 1 : On, 2 : Off – next test selected
3 LD Test 1 : On, 2 : Off – next test selected

2 1 Feed Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

2 Exit Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

3 Cover Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

4 Empty Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

5 Manual Sensor Text 1. Check : read the sensor

2. Next : Next Sensor test

3 1 Therm ADC 180 1 : On, 2 : Off (maintain the fusing temp. 80˚C)

2 Therm ADC 140 1 : On, 2 : Off (maintain the fusing temp. 135˚C)
3 Therm ADC 120 1 : On, 2 : Off (maintain the fusing temp. 160˚C)
4 Therm ADC 100 1 : On, 2 : Off (maintain the fusing temp. 191˚C)

4 1 MHV Test 1 : On, 2 : Off (-1550V ± 50V)

2 Dev Bias Test 1 : On, 2 : Off (-430V ± 20V)
3 THV EN/NEG Test 1 : On, 2 : Off (-1200V +300V/-150V)
4 THV ON (1300V) 1 : On, 2 : Off (+1300V ±20V)
5 THV ADC 1300V 1 : On, 2 : Off (ADC Value : 101 ± 5)
6 THV ADC 600V~3500V 1 : On, 2 : Off (Compare each ADC Value)

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6.5.3 Detail Description (Engine Test Mode)

Function Name Description Display

01.Motor Test The main motor starts when the execution key is pressed Main Motor On/Off
and stops when the stop key is pressed.

02.Pick Up Test Automatically stops, when the execution is chosen. Tray 1,2 Solenoid On/Off
stops, when the execution is chosen.

03.Fan Test The fan starts when the execution key is pressed and Fan On/Off
stops when the stop key is pressed.

04.Manual Clutch Test The tray2,3 clutch is on for 1sec and then it automatically Tray 2,3 Clutch On/Off
stops, when the execution is chosen.On this function,
the main motor runs before 2sec from the point of the clutch
on in order to check the clutch state.

05.PTL Test PTL(Pre-Transfer Lamp) is lights when the execution key PTL On/Off
chosen and it stops when the stop key is chosen.

11.LSU Motor The laser motor starts when the execution key is pressed Laser Motor On/Off
and stops when the stop key is pressed.

12.LSU Hsync Test The LSU motor starts and "Laser Ready" is displayed if Laser Leady On/Off
the motor spins at the correct speed, otherwise "Laser Error"
is displayed.

13.LD Test "Diode On" is displayed, when the laser diode is on. Diode On/Off
Otherwise "Diode Off" is displayed.

21.Feed Sen Test These functions allow the current state of the sensor to be

"Sensor Off" or “ Sensor On ”

22.Exit Sen Test displayed.

23.Cover Sen Test This function allows the current state of the Cover sensor

"Cover Open" or "Cover Close"
to be displayed. Touch the sensor and confirm that the
message changes: "Cover Open" to " Cover Close"

24.Empty Sen Test These functions allow the current state of the sensor to be

"Sensor Off" or “ Sensor On ”

25.Manual Sen Test displayed.

31.Them ADC 180 "Current value" is displayed on the upper line of the LCD, Target temperature and

32.Them ADC 140 and "Target value" on the bottom line. output temperature from

33.Them ADC 120 Target value is limited from "191°C" to "80°C" thermistor and ADC.

34.Them ADC 100

41.MHV Test These Functions are provided to check whether the MHV On/Off

42.Dev Bias Test control of the HVPS is functioning correctly. Dev Bias On/Off

43.THV EN/NEG Test THV EN/NEG On/Off

44.THV ON(1300V) THV On/Off

45.THV ADC 1300V ADC value displayed.

46.THV ADC 600V~3500 ADC value displayed.

6.6 Identify Sale Date

This function confirms the date that the consumer bought the product and used the product for the first time.
When the consumer first operates the machine, it will start the scan and page counters.
The time the machine was first used is also displayed.

These settings are remembered after memory delete (Clear All Memory).

< Method >

Press MENU, #, 1, 9, 3, # in sequence. The Firmware version is displayed on the LCD.
Press 1( in the number keypad) : The LCD display shows "Updated date"
Press 2( in the number keypad) : The LCD display shows "Product first use date"

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6.7 Consumables and Replacement Parts

The life cycle outlined below is a general guideline for maintenance purposes and is for reference only.
Environmental conditions (temperature, humidity, dust etc.) and actual use can cause these figures to vary.

COMPONENT REPLACEMENT CYCLE

ADF Rubber 20,000 Pages
Pick-up Roller 150,000 Pages
Friction Pad 60,000 Pages
Transfer Roller 60,000 Pages
Fuser Unit 80,000 Pages
Toner Cartridge 3,000 Pages (A4 ISO 5% Pattern)

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6.8 Abnormal Image Printing and Defective Roller

If a mark or other printing defect occurs at regular intervals down the page it may be caused by a damaged or
contaminated roller. Measure the repetition interval and refer to the table below to identify the roller concerned.

No Roller Abnormal image period Kind of abnormal image

1 OPC Drum 75.5mm White spot, Block spot
2 Charge Roller 37.7mm Black spot
3 Supply Roller 44.9mm Horizontal density band
4 Develop Roller 35.2mm Horizontal density band
5 Transfer Roller 47.1mm Black side contamination/transfer fault
6 Heat Roller 77.8mm Black spot and fuser ghost
7 Pressure Roller 75.4mm Black side contamination

1
2
3
4

OPC Drum

Charge Roller

Supply Roller

Developing Roller

5
6
7

Transfer Roller

Heat Roller

Pressure Roller

L S U

Fuser

CR

PR

OPC

TR FR

Toner Cartridge

DR

SR

PTL

MP Sensor

R

/

K

C

I

P

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6.9 Error Messages

The front panel displays the printer's status or error messages. Refer to the list below for an explanation of these
messages and how to clear problems. The messages and their meanings are listed in alphabetical order, with numbered
messages following.

MP Tray Jam [Door Open]

Meaning: A paper jam has occurred in the manual feeder or the multi-function printer detects improper feeding from

the manual feeder.

Solution: Clear the paper jam. Load paper in the manual feeder correctly.

Cancel ? 1. Yes 2. No (Only SCX-4720F)

Meaning: While storing the document in memory the memory has become full.
Solution: To cancel the fax job, press the ‘1’button to accept “Yes.” If you want to send the pages that were stored

press the ‘2’button to accept “No.” This will send ONLY the pages stored. The remaining pages should be
sent later when more memory becomes available.

[COMM. Error] (Only SCX-4720F)

Meaning: The multi-function printer has a communication problem.
Solution: Ask the sender to try again.

Low Heat Error / Open Heat Error

Meaning: There is a problem in the fuser unit.
Solution: Check thermostat, thermister contact point & Heating Lamp.

[Over Heat]

Meaning: The printer has overheated.
Solution: Your unit will automatically return to the standby mode when it cools down to normal operating temperature.

If failure persists,check the ELAHOU-FUSER.

Delayed Function Full (Only SCX-4720F)

Meaning: The delayed fax job list or memory space is full.
Solution: Cancel any unnecessary delayed fax jobs.

Document Jam

Meaning: The loaded document has jammed in the Automatic Document Feeder (ADF).
Solution: Clear the document jam.

[Door Open]

Meaning: The front or rear cover is not securely latched.
Solution: Close the cover until it locks into place.

Enter Again

Meaning: You entered an unavailable item.
Solution: Enter the correct item again.

Function Impossible

Meaning: You have tried to use a combination of printer functions that can not be used at the same time.
Solution: Reduce the number of selected functions or use only one function at a time.

Group Not Available (Only SCX-4720F)

Meaning: You have tried to select a group location number where only a single location number can be used, such

as when adding locations for a broadcasting operation.

Solution: Use a speed dial number or dial the number manually using the number keypad.

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[LSU Error]

Meaning: A problem has occurred in the Laser Scanning Unit (LSU).
Solution: Use TECH mode to test LSU. Replace the LSU

Invalid Cartridge or No Cartridge

Meaning: You have used an unauthorized cartridge.
Solution: You must use a Samsung approved cartridge.

[Line Error] (Only SCX-4720F)

Meaning: Your machine cannot connect with the remote machine or has lost contact because of a problem with the

phone line.

Solution: Try again. If the problem persists, wait an hour or so for the line to clear and try again. Or, turn the ECM

on.

Memory Full (Only SCX-4720F)

Meaning: The memory is full.
Solution: Delete any unnecessary documents (delayed transmission, broadcast or polling jobs) or retransmit after

more memory becomes available. This can also be caused when a large complex document with many
pages is being sent, try splitting the job into more than one operation.

[No Answer] (Only SCX-4720F)

Meaning: The remote fax machine has not answered after several redial attempts.
Solution: Try again. Verify the number to make sure a fax can be received.

No. Not Assigned (Only SCX-4720F)

Meaning: YThe speed dial location you tried to use has no number assigned to it.
Solution: Dial the number manually using the number keypad or assign the number.

No. Not Available (Only SCX-4720F)

Meaning: You have tried to delete the number for a delayed fax job.
Solution: Verify the number to be deleted and try again.

Or Delete the number after the delayed fax job is completed or deleted.

[No Paper] Add Paper

Meaning: The paper in the paper tray has run out.
Solution: Load paper in the paper tray.

Operation Not Assigned (Only SCX-4720F)

Meaning: You are performing an Add / Cancel operation, but there are no jobs waiting.
Solution: Check the display to see if there are any scheduled jobs. The display should indicate if any scheduled jobs

are in Standby mode, for example, Delay Fax.

[Paper Jam 0] Open/Close Door

Meaning: Paper has jammed in the feeding area of the paper tray.
Solution: Clear the jam.

[Paper Jam 2] Check Inside

Meaning: Paper has jammed in the paper exit area.
Solution: Clear the jam.

[Power Failure]
Meaning: The power has been turned off and then on and the printer’s memory has not been saved.
Solution: The printer’s memory was not saved due to a power failure. The job will need to be started over.

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Registered

Meaning: The group dial location is already registered with another speed dial number.
Solution: Select another group dial location.

[Retry Redial?] (Only SCX-4720F)

Meaning: The multi-function printer is waiting for a specified time interval to redial a previously busy station.
Solution: You can press <Select>to immediately redial, or <Cancel>to cancel the redial operation.

[Toner Low]

Meaning: The toner is almost empty.
Solution: Take out the toner cartridge and gently shake it. By doing this, you can temporarily reestablish printing

operations.
Or Replace the toner cartridge with a new one for the best print quality.

Priority Fax Function Full (Only SCX-4720F)

Meaning: The priority fax job queue is full.
Solution: Cancel any unnecessary priority fax jobs.

[Incompatible] (Only SCX-4720F)

Meaning: The remote machine did not have the requested feature, such as a sending a color fax.

This message also occurs if the remote machine does not have enough memory space to complete the
operation you are attempting.

Solution: Reconfirm the remote machine’s features.

[Jam 1] or [No Cartridge]

Meaning: Paper has jammed in the paper exit area. Or, the toner cartridge is not installed.
Solution: Clear the jam. Or, install the toner cartridge.

[Line Busy] (Only SCX-4720F)

Meaning: The receiving party did not answer or the line is already engaged.
Solution: Try again after a few minutes.

Load Document

Meaning: You have attempted to set up a copy or fax operation with no document loaded into the ADF.
Solution: Load a document into the ADF and try again.

Scanner Locked

Meaning: The scanner module is locked
Solution: Unlock the scanner and press Stop/Clear.

[Stop Pressed]

Meaning: The Stop/Clear button has been pressed during a copy or fax operation.
Solution: Try again.

[Toner Empty] Replace Toner

Meaning: The toner cartridge has run out. The machine stops printing.
Solution: Replace the toner cartridge with a new one.

[Retry Redial?] (Only SCX-4720F)

Meaning: The machine is waiting for a specified time interval to redial a previously busy station.
Solution: You can press Enter to immediately redial, or Stop/Clear to cancel the redial operation.