Samsung ML-2010 Alignment & Adjustment

Alignment and Adjustments

Samsung Electronics

Service Manual

4-1

4

4

4. Alignment and Adjustments

4.1 Sample Pattern

This product has the several sample patterns for maintenance. With the sample patterns, check the
existence of the abnormality. The patterns help to regularly maintain the product.

4.1.1 Printing a Demo Page

Print a demo page or a configuration sheet to make sure that the printer is operating correctly.

1) Hold down the Cancel button for about 2 seconds to print a demo page.

2) The Demo page or the configuration sheet shows the printer’s current configuration.

ML-20XX Series

Monochrome Laser Printer

Up to 22ppm(Letter)/20ppm(A4) print speed: ML-2010/ML-2015 Series

* Print speed will be affected by operating system used, computing performance,
application software, connecting method, media type, media size, and job complexity.

DigitAIIperformance

True 600 x 600 dpi print resolution
150NHz processor
8MB Memory

One touch Toner Save Button - expand the life of the toner cartridge by 40%

DigitAIIValue

One touch Cancel Button
Great Price, Great Performance

150 sheets paper cassette

Windows 98/2000/Me/XP: ML-2010 Series

DigitAIIcompatibility

Various Linux OS including Red Hat, Caldera,
Debian, Mandrake, Slackware, SuSE, and Turbo Linux
USB 1.1 interfaces: ML-2010 Series

www.samsungprinter.com

**AII other trademarks are the property of their respective owners.

Samsung Electronics, AII rights reserved.

e v e r y o n e ’ s i n v i t e dTM

R

Windows 95/98/NT4.0/2000/Me/XP: ML-2015 Series

4.2.2 On Line/Error and T oner Save LEDs

Samsung Electronics

Service Manual

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4.2 Control Panel

4.2.1 OP Panel

If the On Line/Error lights green, the printer is ready to print.
If the On Line/Error lights red, the printer is experiencing an error,

such as jammed paper, no paper, the open cover or the empty toner cartridge.
If you press the Cancel button while the printer is receiving data,

the On Line/Error LED blinks red to cancel printing.
In Manual Feed mode, if there is no paper in the tray, the OnLine/Error LED blinks red.

Load paper into the tray and the LED stops blinking.
If the printer is receiving data, the On Line/Error LED slowly blinks green.

If the printer is printing the received data, the On Line/Error LED blinks green fast.
If you press the Cancel button in Ready mode, this LED is on and the Toner Save

mode is enabled.
If you press this button once again, this LED is off and the
Toner Save mode is disabled.

If the On Line/Error and Toner Save LEDs blink, your system has some problems.

LED Description

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Samsung Electronics

Service Manual

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4.2.3 Cancel button

Printing demo page In Ready mode, press and hold this button for about 2 seconds until

all LEDs blink slowly, and release.

Manual feeding Press this button each time you load a sheet of paper in the

tray, when you select Manual Feed for Source from your software application.

Canceling print job Press this button during printing. The On Line/Error LED blinks while the

print job is cleared from both the printer and the computer, and then return to
Ready mode. This may take some time depending on the size of the print job.
In Manual Feed mode, you can’t cancel the print job by pressing this button.

Toner Save mode on/off In Ready mode, press this button to turn the Toner Save mode on or off.

LED Description

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Service Manual

Alignment and Adjustments

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COMPONENT REPLACEMENT CYCLE

Pick-up Roller 50,000 Pages

Transfer Roller 50,000 Pages

Fuser 50,000 Pages

Toner Cartridge 2,000 Pages(Sales), 1,000 Pages(Initial)

4.3 Consumables and Replacement Parts

The cycle period outlined below is a general guideline for maintenance.

A printer can’t transmit or receive documents this line is for fax machines.

Environmental conditions and actual use will vary these factors.
The cycle period given below is for reference only.

4.4 LED Status Error Message

ERROR LED Status DCU CODE

Open Fuser Error The [Error] LED (red) and the [Toner Save] LED are simultaneously 60

flashing every one-second.

Over Heat Error The [Error] LED (orange) and the [Toner Save] LED are 68

simultaneously flashing every one-second.

Low Heat Error The [Error] LED (red) and the [Toner Save] LED are simultaneously 62

flashing every 4 seconds.
LSU not Ready Error The [Error] LED (green) and the [Toner Save] LED are 95
(Pmotor Error) simultaneously flashing every one-second.
LSU Not Ready Error The printing is stop in the fad status, and the [Error] LED (green) and 96
(HSYNC Error) the [Toner Save] LED are simultaneously flashing every 4 seconds.

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Service Manual

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BIN PATH

1
2
3
4

OPC Drum

Charge Roller

Supply Roller

Developing Roller

5
6
7

Transfer Roller

Heat Roller

Pressure Roller

4.5 Periodic Defective Image

If the delinquent image regularly occurs in the printed-paper, it is due to delinquent or damaged roller.
Refer to the table in below and check the condition of the roller.

No Roller Defective image Typical defect

1 OPC Drum 75.5mm white spot on black image or black spot
2 Charge Roller 37.7mm black spot
3 Supply Roller 47.5mm light or dark horizontal image band
4 Developing Roller 35.2mm horizontal image band
5 Transfer Roller 46.2mm image ghost
6 Heat Roller 63.9mm Black spot and image ghost
7 Pressure Roller 75.4mm black spot on the backside

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Service Manual

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4.6 How to use DCU

4.6.1 DCU Setup

You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave the
connect the harness wire(10 pin/4 pin) to the CN1(ML-1610) of the Main control board.

ML SERIES DIAGNOSTIC CONTROL UNIT

04

05

07

08

09

10

DEV 300

LSU READY

PAPER EMPTY

COVER OPEN

COER HEATING

DEV 350

LSU MT & LD

PAPER WIDTH

EXIT SENSOR

PRINTING TEMP

DEV 350

LSU MOTOR

NEW CRU

FEED SENSOR

READY HEAT

ON

OFF

STATUS

SELF

TEST

DIAGNOSTIC

DIAGNOSTIC CODE

00
01
02
03
04
05
06
07
08
09
10
11

12

13

14

61

00
01
02
03
04

20
30
40
50

69

60
62
68
64
70
71
72
73
95

MAIN MOTOR OPERATING SYSTEM
MAIN HIGH-VOLTAGE ON
TRNSFER HIGH-VOLTAGE (-)ON
THV(+) REFERANCE VOLTAGE
DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON
LSU OPERATING SYSTEM
PICKUP CLUTCH ON
PEEMPTY/PWITH/NEW CRU TEST
FEED & EXIT SENSOR TEST
COVER OPEN SENSOR TEST
FUSER TEST
HOT BURN TEST

CLEAN MODE PRINT

THV(+)TRIGGER, ALL HV & FAN ON

THV(+) REFERENCE ON

ERROR STATUS CODE

STATUS CODE

WARM UP

READY (REGAL)
READY (LETTER)
READY (A4)
READY (EXECUTIVE)
READY (B5)

PRINT START
FEED SENSOR ON
FEED SENSOR OFF
PAPER OUT

SLEEP MODE

OPEN FUSER ERROR
LOW TEMPERATURE ERROR
OVER HEATING ERROR
COVER OPEN ERROR
NO PAPERR
PAPER JAM 0
PAPER JAM 1
PAPER JAM 2
LSU NOT READY

DIAGNOSTIC
MODE

DOWN

UP ENTER

SHIFT STOP

TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL
AND TURN THE PRINTER POWER ON.

4.6.2 Code

Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code tells the
function of the printer.

1) Normal Code

While printing or warming up, it indicate the position of the paper

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2) Error Code

When detecting the malfunction, the printing is stopped to indicate error code.

Code State Description

61 Warm up The printer is on, the cover is open or close.
00~05 Ready(kind of paper) The printer is ready, the paper is detected when the first paper is printed.

00: Legal ,01: Letter ,02: A4 ,03: EXEC ,04: B5 ,05: Folio, 06: A5/A6

20, 21, 22 Print Start The engine controller received the print order from the video controller.

20: 1st, 21: MP, 22: SCF
30 Feed Sensor On The paper is passing out of the Feed Sensor.
40 Feed Sensor off The paper has passed out of the Feed Sensor.
50 Paper Out The paper has passed out of Exit Sensor.
69 Sleep Mode The fuser power turned off to minimize the power consumption.

Code State Description

60, 62, 68 Fuser Error The error in the fuser occurred. There is a short circuit in the thermistor

and the thermostat while printing, Low Temperature Error occurs.

• 60: Open Fuser Error

• 62: Low Heat Error

• 68: Over Heat Error

64 Cover Open The Printer Cover is open.
65 CRU Error The Toner Cartridge not installed,
70 No Paper No paper in the paper cassette.
71 Paper Jam 0 The front part of paper is jammed between pickup unit and Feed sensor.
72 Paper Jam 1 The front part of paper is jammed between the Discharge sensor and Feed

sensor.

73 Paper Jam 2 The front part of paper is jammed just after passing through the discharge

sensor.
76 Out Bin Full The Out bin is filled with paper.
95 LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output.

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Service Manual

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4.6.3 Self Diagnostic Mode

If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.

The printer works only in the self-test mode to solve the malfunction problem.
To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same time.
Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button [Up] or
[Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of [shift] and
[Enter] together.

Code Description

00 Main Motor Operating System

Only the main motor is in operation.

01 Main High Voltage On(THV-)

-1400 voltage output by MHV terminal.

Caution : High voltage probe should be used.

02 Transfer High Voltage(-)On(THV-)

-1000 voltage output by MHV terminal.
Caution : High voltage probe should be used.

03 Transfer High Voltage (+)Reference on (THV +)

+1300 voltage output by MHV terminal.

Caution : High voltage probe should be used.

04 DEV/supply High Voltage : DEV/Supply High Voltage Test.

The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply
high voltage output by each HV terminal. Press the [Up] button to switch the voltage. The
middle and right one of the three LEDs are on and -350 voltage output by DEV HV
terminal.

Caution : High voltage probe should be used.

05 LSU Operating System

The scanning motor of LSU is in operation, the right LED of the three buttons on. Press
the [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is
normal, all LEDs are on.

06 Pickup clutch on

The Solenoid in the printer is in operation. To stop the operation, Press the button [shift]
and [Enter] together.

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Service Manual

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Code Description

07 Paper Empty Sensor Test :

If activate the Actuator of the PEMPTY Sensor, the left and right of the three LEDs are
on.
Paper Empty Sensor ON/OFF 1st LED ON/OFF

08 Feed & Exit Sensor Test

Test the Feed sensor and Discharge sensor in the same way as '07'.
Feed Sensor ON/OFF 2nd LED ON/OFF
Exit Sensor ON/OFF 3rd LED ON/OFF

09 Cover Open Sensor Test

Test the Cover Open Sensor in th same way as code '07’
Cover Open Sensor ON/OFF1st LED ON/OFF

10 Fuser Test

If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to
READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the
fuser is up to Printing Mode.
If you press the button once more, the left LED is on and temperature of the fuser is up to
overheat Mode.

11 Hot Burn Test

If the [enter] button pressed, the printer is continuously printing without detection.
Turn the power off to stop operation.

12 Cleaning Mode Print Mode

Print the paper to clean the OPC Drum in the Cartridge.

13 THV(+) TRIGGER. ALL HV :

All high voltage output by each HV terminal and LSU and the fan is in operation. In this
mode, electronic resistance of transfer roller and high voltage is detected.

14 PTL Test : (ML-1610 : not design)

Indicates the function of the PTL, same method of the code ‘07’.

15 Fan Test :

Indicates the function of the Fan, same method of the code ‘07’.

16 Manual Pickup Test :

Indicates the function of th Manual Pickup, same method of the code ‘07’.

17 Manual Sensor Test :

Indicates the function of the Manual Sensor, same method of the code ‘07’.

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Service Manual

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No. Function Enter Up/ Dow n Stop Remark

00

Motor

Motor Run Mo tor S top

01

MHV

Mhv On Mhv Off -1300V

-1000

-350V

020mV

V

02

THV(-)

Thv Negative On Thv Negative Off

03

THV(+)

Thv On Thv Off +1300V

04

DEV

Dev On

Supp ly DEV

-350V

De v O f f

0 : -550V 0:

05

LSU

LSU R u n

On Off Ready

LSU Stop

06

Pic kU p

Pickup On Pickup Off

07

PEmpty

Pape r Em pt y

08

Sen so r

Ex it Fee d

09

Cover

Cover Open

10

Fus er

Fuser On Fuser Off

11

Hot Burn

Ho tB u rn O n

12

Clean Print

Cl e an Pr inti n g

13

Thv

Refer ence

low adequate high

14

PTL

PTL On P PTL 없음TL Off

15

FAN

Fan O n Fan Off

16

Ma n ual

Pic kU p

Manual Pickup On Manual Pickup O ff

17

Ma n ual

Sen so r

Manual Sensor

4.6.4 Self T est Button

If the Self-Test button pressed, vertical lines are printed.

Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After warming­up the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection, the printer begins
printing(trial printing and data from the PC). It is convenient to use this mode when the engine malfunction is
detected in the control board.

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Service Manual

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4.7 Paper Path

1) After taking order, the printer feeds the printing paper from the cassette or manual feeder.

2) The fad paper passes the paper feeding sensor. (Jam 0 occurs if the sensor is not operated after certain time

passes)

3) The paper passed the paper feeding sensor moves to the paper exit sensor via printing process. (Jam 1 occurs

if the sensor is not operated after certain time passes)

4) The paper passed the paper exit sensor moves out from the set. (Jam 2 occurs sometime after if the tailing edge

of the paper is not coming out from the set after the leading edge of paper passes the paper exit sensor.)

BIN PATH

❶ SMPS ❷ Fuser
❸ Toner Cartridge ❹ LSU
❺ Exit Roller ❻ OPC
❼ Pick-Up Roller ❽ KNOCK-UP PLA TE
❾ KNOCK-UP PLA TE DOWN ❿ ASS’Y HOLDER PAD
󱆌 Feed Sensor 󱆍 MAIN PBA
󱆎 SMPS 󱆏 HVPS

󱆏

BIN PATH

BIN PATH

BIN PATH

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Service Manual

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4.7.1 Clearing Paper Jams

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

• The tray is overfilled.

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

• Paper that does not meet paper specifications has been used.

• Paper that is outside of the supported size range has been

If a paper jam occurs, the On Line/Error LED on the control panel lights red. Find and remove the jammed paper.
If it is invisible, look inside the printer.

4.7.2 In the Paper Exit Area

1. If the paper jams as it exits to the output tray and a long portion of the paper is visible, pull the paper straight out.

When you pull the jammed paper, if there is resistance and the paper does not move immediately, stop pulling.
Continue with the next step.

2. Open the top cover and the inner cover.

Heat roller

3. Loosen the paper if it is caught in the heat rollers. Then pull the paper gently out.

4. Close the inner cover and the top cover.

5. Open and close the front cover. Printing can be resumed.

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Service Manual

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Service Manual

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4.7.3 In the Paper Feed Area

1. Remove any missfeed paper by pulling it out by the visible edge from the tray. Make sure that all of the paper is
properly aligned in the tray.

2. Open and close the front cover. Printing can be resumed.

4.7.4 Around the T oner Cartridge

1. Open the front cover.

2. Pull the toner cartridge out and remove it from the printer.

3. Gently pull the paper toward you.

4. Check that there is no other paper in the printer.

5. Reinstall the toner cartridge, and then close the cover. Printing can be resumed.

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4.7.5 Tips for A voiding Paper Jams

By selecting the correct paper types, most paper jams can be avoided.

• Ensure that the adjustable guides are positioned correctly.

• Do not overload the tray.

• Do not remove the paper from the tray while printing.

• Flex, fan and straighten the paper before loading.

• Do not use creased, damp or highly curled paper.

• Do not mix paper types in the input tray.

• Use only recommended print media.

• Ensure that the recommended print side is facing up when loading paper into the input tray.

4.7.6 Solving Print Quality Problems

Print Quality Checklist

Print quality problems can be resolved by following the checklist below.

• Redistribute toner in the toner cartridge

• Clean the inside of the printer

• Adjust the print resolution from the printer properties

• Ensure that the Toner Save mode is off

• Clear general printing problems

• Install a new toner cartridge, and check the print quality