SAMSUNG 510N10T, 710N, 710T, 910N, 910T Service Manual

TFT-LCD MONITOR

Chassis Model MJ15AS* 510N MJ15BS* 510T MJ17AS* 710N MJ17BS* 710T MJ19AS* 910N MJ19BS* 910T

Manual

SERVICE

TFT-LCD MONITOR CONTENTS

1. Precautions

2. Product Specifications

3. Disassembly & Reassembly

4. Alignments & Adjustments

5. Troubleshooting

6. Exploded View & Parts List

Simple Stand

7. Electrical Parts List

8. Block Diagram

9. Wiring Diagram

10. PCB Layout

11. Schematic Diagrams

Pivot Stand

12. Panel Description

❈ This Service Manual is a property of Samsung

Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law.

Samsung Electronics Co.,Ltd.

416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Kyungki-Do, Korea,443-742 Printed in Korea P/N : BN82-00087S-00 http://itself.sec.samsung.co.kr

1 Precautions

DEVICE UNDER TEST

TEST ALL

EXPOSED METAL

SURFACES

(READING SHOULD

NOT BE ABOVE 0.5mA)

LEAKAGE CURRENT

TESTER

2-WIRE CORD

*ALSO TEST WITH

PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED)

EARTH

GROUND

Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.

1-1 Safety Precautions

1-1-1 Warnings

1. For continued safety, do not attempt to modify the circuit board.

2. Disconnect the AC power and DC power jack before servicing.

1-1-2 Servicing the LCD Monitor

1. When servicing the LCD Monitor, Disconnect the AC line cord from the AC outlet.

2. It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this meter periodically.

1-1-3 Fire and Shock Hazard

Before returning the monitor to the user, perform the following safety checks:

1. Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the monitor.

2. Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

3. Leakage Current Hot Check (Figure 1-1):

WARNING:

Do not use an isolation transformer during this test.

Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for

Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

Figure 1-1. Leakage Current Test Circuit

4. With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the power-plug prongs in the AC outlet and repeat

the test.

1-1-4 Product Safety Notices

Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection. The protection they give may not be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by

on schematics and parts lists. A substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

1-1

1 Precautions

1-2 Servicing Precautions

WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions

section of this manual.

Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the

safety precautions, always follow the safety precautions.

1-2-1 General Servicing Precautions

1. Always unplug the unit’s AC power cord from the AC power source and disconnect the DC Power Jack before attempting to: (a) remove or reinstall any component or assembly, (b) disconnect PCB plugs or connectors, (c) connect a test component in parallel with an electrolytic capacitor.

2. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

3. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the area around the serviced part has not been damaged.

4. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).

5. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500 V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

6. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last.

1-3 Electrostatically Sensitive Devices (ESD) Precautions

Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly called Electrostatically Sensitive Devices (ESD). Examples of typical ESD are integrated circuits and some field-effect transistors. The following techniques will reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wriststrap device. To avoid a shock hazard, be sure to remove the wrist strap before applying power to the monitor.

2. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of an electrostatic charge.

3. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDs.

4. Use only a grounded-tip soldering iron to solder or desolder ESDs.

5. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.

6. Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

7. Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution: Be sure no power is applied to the

chassis or circuit and observe all other safety precautions.

8. Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting your foot from a carpeted floor can generate enough static electricity to damage an ESD.

1-2 MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

2 Product Specifications

2-1 MJ15AS*/MJ15BS*/MJ17AS*/MJ17BS* Specifications

Description

Item

MJ15AS*/MJ15BS* MJ17AS*/MJ17BS*

LCD Panel

Scanning Frequency Horizontal : 31 kHz ~ 61 kHz (Automatic) Horizontal : 30 kHz ~ 81 kHz (Automatic)

Display Colors 16.2 Million colors

Maximum Resolution Horizontal : 1024 Pixels Horizontal : 1280 Pixels

Input Video Signal Analog, 0.714 Vp-p ± 5% positive at 75 Ω,

Input Sync Signal Type : Separate H/V sync, Composite H/V

Maximum Pixel Clock rate 80 MHz 135 MHz

Active Display Horizontal/Vertical 304.1 mm / 228.1 mm 338 ± 3 mm / 270 ± 3 mm

AC power voltage & Frequency AC 90 ~ 264 Volts, 60/50 Hz ± 12V / 3A AC 90 ~ 264 Volts, 60/50 Hz ± 3 Hz

Power Consumption 25W (normal) 34W (normal)

Dimensions

TFT-LCD panel, RGB vertical stripe, normally black transmissive, TFT-LCD panel, RGB vertical stripe, normally black transmissive, 15-Inch viewable, 0.297 (H) x 0.297 (V) mm pixel pitch 17-Inch viewable, 0.264 (H) x 0.264 (V) mm pixel pitch

Vertical : 50 Hz ~ 75 Hz Vertical : 56 Hz ~ 75 Hz

Vertical : 768 Pixels Vertical : 1024 Pixels

internally terminated

Level : TTL level (V high ≥ 2.0 V, V low ≤ 0.8 V), Sync-on-Green (≤ –0.25 V)

Simple StandSimple Stand / Pivot Stand

Set (W x D x H)

Package

Weight (Set/Package)

Dimensions

Set (W x D x H)

Package

Weight (Set/Package)

Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)

• Designs and specifications are subject to change without prior notice.

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

13.3 x 2.2 x 10.7 Inches (338.0 x 56.3 x 272.0 mm) State of stand disassembled 14.6 x 2.4 x 12.4 Inches (370.0 x 60.3 x 316.0 mm) State of stand disassembled

13.3 x 6.9 x 13.3 Inches (338.0 x 175.0 x 337.0 mm) State of stand installed 14.6 x 6.9 x 15 Inches (370.0 x 175.0 x 381.0 mm) State of stand installed

15.3 x 4.9 x 15.1 Inches (388 x 125 x 383 mm) 17.9 x 5.6 x 17.2 Inches (455 x 141 x 437 mm)

3.1 kg (6.8 lbs) / 4.25 kg (9.4 lbs)

Operating Humidity : 10 % ~ 80 % Storage Temperature : -13°F ~ 113°F (-25°C ~ 45°C) Storage Humidity : 5 % ~ 95 %

4.5 kg (9.9 lbs) / 6.15 kg (13.6 lbs)

Pivot Stand

14.6 x 2.4 x 12.4 Inches (370.0 x 60.3 x 316.0 mm) State of stand disassembled

14.6 x 7.5 x 16.0 Inches (370.0 x 190.9 x 406.8 mm) State of stand installed

20.0 x 10.1 x 16.0 Inches (508 x 256 x 407 mm)

6.25 kg (13.8 lbs) / 7.95 kg (17.5 lbs)

2-1

2 Product Specifications

2-2 MJ19AS*/MJ19BS* Specifications

Item

LCD Panel TFT-LCD panel, RGB vertical stripe, normally black transmissive,

19-Inch viewable, 0.297 (H) x 0.297 (V) mm pixel pitch

Scanning Frequency Horizontal : 31 kHz ~ 61 kHz (Automatic)

Vertical : 55 Hz ~ 76 Hz

Display Colors 16.2 Million colors

Maximum Resolution Horizontal : 1280 Pixels

Vertical : 1024 Pixels

Input Video Signal Analog, 0.7 Vp-p ± 5% positive at 75 Ω,

internally terminated

Input Sync Signal Type : Separate H/V sync, Composite H/V

Level : TTL level (V high ≥ 2.0 V, V low ≤ 0.8 V), Sync-on-Green (≤ –0.25 V)

Maximum Pixel Clock rate 135 MHz

Active Display Horizontal/Vertical 376.32 mm ± 3 mm / 301.056 mm ± 3 mm

AC power voltage & Frequency AC 90 ~ 264 Volts, 60/50 Hz ± 3Hz

Description

Power Consumption 38W (normal)

Dimensions

Set (W x D x H)

Package

Weight (Set/Package)

Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)

• Designs and specifications are subject to change without prior notice.

16.4 x 2.4 x 13.8 Inches (416.6 x 60.2 x 349.4 mm) State of stand disassembled 16.4 x 2.4 x 13.8 Inches (416.6 x 60.2 x 349.4 mm) State of stand disassembled

16.4 x 7.7 x 16.7 Inches (416.6 x 195.7 x 424.6 mm) State of stand installed 16.4 x 7.5 x 16.7 Inches (416.6 x 190.9 x 423.4 mm) State of stand installed

20.0 x 5.9 x 19.4 Inches (509 x 150 x 494 mm) 21.1 x 9.4 x 17.4 Inches (535 x 238 x 443 mm)

5.85 kg (12.9 lbs) / 7.8 kg (17.2 lbs)

Operating Humidity : 10 % ~ 80 % Storage Temperature : -13°F ~ 113°F (-25°C ~ 45°C) Storage Humidity : 5 % ~ 95 %

Simple Stand Pivot Stand

7.30 kg (16.1 lbs) / 9.1 kg (20.1 lbs)

2-2 MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

2 Product Specifications

2-3 Pin Assignments

Pin No.

10 11 12 13 14 15

Sync Type

Separate Composite

1 2 3 4 5 6 7 8 9

Red Green Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) H-Sync. V-Sync. DDC Clock (SCL)

15-Pin D-Sub Signal Cable Connector

Red Green Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) H/V-Sync. Not Used DDC Clock (SCL)

Sync-on-green

Red Green + H/V Sync. Blue GND DDC Return (GND) GND-R GND-G GND-B DDC Power Input (+5V) Self Raster GND Bi-Dr Data (SDA) Not Used Not Used DDC Clock (SCL)

Pin No.

Sync Type

Rx2-

Rx2+

GND

No Connection

DDC Clock (SCL)

DDC Data (SDA)

Rx1-

Rx1+

No Connection

24P DVI-D

No Connection

+5V_M

Self Raster

+5V_M

Rx0-

Rx0+

No Connection

RxC+

RxC-

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

2-3

2 Product Specifications

QRS

Video

Sync

Horizontal

Vertical

CDE

Video

Sync

VIDEO

Horizontal

Vertical

2-4 Timing Chart

This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals.

Table 2-1 Timing Chart

Timing

fH (kHz)

A µsec

B µsec

C µsec

D µsec

E µsec

fV (Hz)

O msec

P msec

Q msec

R msec

S msec

Clock Freq. (MHz)

Mode

VGA2/

70 Hz

720 x 400

31.469

31.777

3.813

1.589

26.058

0.318

70.087

14.268

0.064

0.858

13.155

0.191

28.322

IBM

VGA3/

60 Hz

640 x 480

31.469

31.778

3.813

1.589

26.058

0.318

59.940

16.683

0.064

0.794

15.761

0.064

26.175

VESA

VESA(MJ17AS*/MJ17BS*/

(MJ15AS*/MJ15BS*/MJ17AS*/MJ17BS*/MJ19AS*/MJ19BS*)

640/75 Hz

640 x 480

37.500

26.667

2.032

3.810

20.317

0.508

75.000

13.333

0.080

0.427

12.800

0.027

31.500

800/60 Hz

800 x 600

37.879

26.400

3.200

2.200

20.000

0.000

60.317

16.579

0.106

0.607

15.840

0.0261

40.000

800/75 Hz

800 x 600

46.875

21.333

1.616

3.232

16.162

0.323

75.000

13.333

0.064

0.448

12.800

0.021

49.500

1024/60 Hz

1024 x 768

48.363

20.677

2.092

2.462

15.754

0.369

60.004

16.666

0.124

0.600

15.880

0.062

75.000

1024/75 Hz

1024 x 768

60.023

16.660

1.219

2.235

13.003

0.203

75.029

13.328

0.050

0.466

12.795

0.017

78.750

1280/60 Hz

1280 x 1024

63.981

11.852

60.020

16.005

15.630

108.000

MJ19AS*/MJ19BS*)

1280/75 Hz

1280 x 1024

79.975

12.504

1.037

2.296

9.259

0.000

1.067

1.837

9.481

0.119

75.025

13.329

0.047

0.594

0.038

0.475

12.804

0.016

0.013

135.000

A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width

C : Back porch D : Active time Q : Back porch R : Active time

E : Front porch S : Front porch

2-4 MJ15AS*/MJ17AS*/MJ19AS*/

Polarity H.Sync

V.Sync

Remark

Video

C D

Sync

Negative

Positive

Separate

Negative

Separate

Separate Sync

Negative

Separate

Video

Q R S

Sync

Positive

Separate

Positive

Separate

Negative

Separate

Positive

Separate

Positive

Separate

Positive

Separate

H/V Composite Sync

Sync-on-Green

Vertical

Green

Horizontal

MJ15BS*/MJ17BS*/MJ19BS*

3 Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the MJ15AS*/MJ17AS*/MJ19AS*/MJ15BS*/MJ17BS*/MJ19BS* TFT-LCD monitors.

WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling

these components.

3-1 Disassembly

Cautions:1. Disconnect the monitor from the power source before disassembly.

2. Follow these directions carefully; never use any metal instrument except provided jig to separate the cabinet.

3. R/Cover opening jig : BH81-00001A

1. Place monitor face down on cushioned table. Remove 4 screws from grip on the stand and remove the stand. Remove 2 screws from the rear cover.

2. Insert the opening stand into the grooves at a hole and press until it clicks and lift the rear cover.

3. Remove 2 screws from the shield.

4. Disconnect function cable from the cover front and lift up the panel. Remove 4 screws from the panel shield. (Right / Left)

5. Lift up the panel shield and carefully remove the silicon glue on the cables with a nipper.

Caution : Lamp wire may be easily damaged. Please use caution when removing the silicon.

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

3-1

3 Disassembly and Reassembly

6. Remove 7 screws, 4 hexa screws from the boards and lift up the boards.

Caution : When repairing panel only, disconnect just LVDS cable, Panel-Lamp / Wire marked in circle in the picture without removing the screws on board in order to lift the board up.

7. This picture is panel.

3-2 Reassembly

Reassembly procedures are in the reverse order of disassembly procedures.

3-2 MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

4 Alignments and Adjustments

This section of the service manual explains how to use the RS232 JIG. This function is needed for AD board change and program memory (IC110) change.

4-1 Required Equipment

The following equipment is necessary for adjusting the monitor:

• Computer with Windows 95, Windows 98, or Windows NT.

• MTI-2031 DDC MANAGER JIG

4-2 Automatic Color Adjustment

To input video, use 16 gray or any pattern using black and white.

1. Select english for OSD language.

2. Press the “ (Enter/Source)” key for 5 seconds.

4-3 DDC EDID Data Input

1. Input DDC EDID data when replacing AD PCB.

2. Receive/Download the proper DDC file for the model from HQ quality control department. Install the below jig (Figure 1) and enter the data.

Figure 1.

4-4 OSD Adjustment When Replacing Panel

1. Adjust brightness and contrast to 0. Then, press the (Enter/Source) key for 5 second.

Service function OSD will appear on screen.

2. Press the + key to place the cursor on the panel. Press the menu key for 5 seconds.

4-5 OSD Adjustment When Replacing Lamp Only

1. Adjust brightness and contrast to 0. Then, press the exit key for 5 seconds. Service function OSD will appear on the screen.

2. Press the + key. Select upper lamp and press the menu key for 5 seconds. Then, select lower lamp and press the menu key for 5 seconds.

❇

Note : Please be sure to read the following instructions for details on service function.

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

4-1

4 Alignments and Adjustments

4-6 Service Function Spec.

4-6-1 How to Display Service Function OSD

1. The value for brightness and contrast should be changed to zero.

2. Within 5 seconds, press the (Enter/Source) key.

3. Service function OSD will be displayed.

❇ If you want to disable the service function OSD, you will have to power off.

Panel Information

Softward Version

Checksum

Figure 2. The example of service function OSD

The service function OSD is based on a grid of 29 columns x 12 rows.

The service function OSD consists of panel information, software version and MICOM checksum.

4-6-2 How to Control Service Function OSD

1. With the panel selected on OSD, whenever you press the right key, the base color will change to blue from “Panel” to “Upper Lamp”, “Lower Lamp”.

Figure 3.

4-2 MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

4 Alignments and Adjustments

4-6-3 How to Control Service Function OSD

•After change the panel or lamp, you must reset service function OSD.

•The case of panel change

After changeing the panel, press the menu key within 5 seconds,.

Then, panel Ch. No increases one step and the panel time information is reset to zero.

Simultaneously, other information is reset to zero (Upper/Lower lamp, Panel cycle).

Figure 4.

4-6-4 How to Control Service Function OSD

•In the case of Upper Lamp or Lower Lamp change

After changeing the Upper Lamp or Lower Lamp,

1. Select the Upper Lamp or Lower Lamp

2. Press the Menu key within an 5 seconds.

Then, Ch. No and time will be reset to zero (selected item only).

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

Figure 5, 6.

4-3

4 Alignments and Adjustments

Memo

4-4 MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

5 Troubleshooting

Notes: 1. Before troubleshooting, setup the PC’s display as below.

• Resolution: 1024 x 768

• H-frequency: 61 kHz

• V-frequency: 75 Hz

2. If no picture appears, make sure the power cord is correctly connected.

3. Check the following circuits.

• No raster appears: Function PBA, Main PBA, I/D PBA

• 5V develop but no screen: Main PBA

• 5V does not develop: I/D PBA

4. If you push and hold the “ (Enter, Source)” button for more than 5 seconds, the monitor automatically returns to the factory preset.

5-1-1 No Power (MJ15A*/MJ15B*)

When Pin 4 of CN600 is 0V

does proper DC 13V, 5V

appear at Pin 1, 2 and 6, 7 of

CN600 separately?

Yes

When Pin 3 of IC602 is DC 5V

does proper DC 3.3V appear at

Pin 4 of IC602?

Yes

When Pin 4 of IC600 is DC 5V

does proper DC 3.3V appear at

Pin 5 and 6 of IC600?

Yes

When Pin 2, 3 of IC601 is

DC 3.3V does proper DC 4.3V

appear at Pin 1 of IC601?

❇

Yes

Check Function Ass’y.

Change IP Board.

Check IC602 and related circuit.

Check IC600 and related circuit.

Check IC601 and related circuit.

Yes

When Pin 2, 3 of IC601 is

DC 4.3V does proper DC 2.5V

appear at Pin 4 of IC601?

* 0V means power on state.

When the monitor work well except DPMS and power switch off, 0V should be applied to number 4 of CN600.

MJ15AS*/MJ17AS*/MJ19AS*/ MJ15BS*/MJ17BS*/MJ19BS*

Check IC601 and related circuit.

5-1

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