Samsung lt29a13w service manual

4 (1)

CONFIDENTIAL

LCD-TV

Chassis Model

AL29JO LT29A13W

AL40JO LT40A13W

SERVICEManual

LCD-TV

1. Precautions

2. Product Specifications

3. Disassembly &

4. Troubleshooting

5. Exploded View & Parts

6. Electrical Parts List

7. Block Diagram

8. Wiring Diagram

9. Schematic Diagrams

10. Panel Description

CONFIDENTIAL

1 Precautions

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.

 

 

 

 

(READING SHOULD

 

 

 

 

NOT BE ABOVE 0.5mA)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEAKAGE

 

DEVICE

 

 

 

 

 

 

 

 

 

CURRENT

 

UNDER

 

 

 

 

 

 

 

 

 

TESTER

 

TEST

 

 

 

 

 

 

 

 

 

 

TEST ALL

 

 

EXPOSED METAL

 

 

 

SURFACES

 

2-WIRE CORD

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).

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED) EARTH GROUND

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.

LT29A13W/LT40A13W

1-1

1 Precautions

1-2 Servicing Precautions

CONFIDENTIAL

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

LT29A13W/LT40A13W

CONFIDENTIAL

2 Product Specifications

2-1 Specifications

Item

 

Description

 

 

 

 

LT29A13W

LT40A13W

 

 

 

 

LCD Panel

TFT-LCD panel, RGB vertical stripe, normally black

TFT-LCD panel, RGB vertical stripe, normally black

 

transmissive, (29 -Inch) viewable, 0.4935 mm pixel pitch

transmissive, (40-Inch) viewable, 0.6735 mm pixel pitch

 

 

 

 

Scanning Frequency

Horizontal : 30 KHz ~ 61 KHz

 

 

Vertical : 56 Hz ~ 75 Hz

 

 

 

 

 

Display Colors

16,777,216 colors

 

 

 

 

 

Maximum Resolution

Horizontal : 1280 Pixels

 

 

Vertical : 768 Pixels

 

 

 

 

 

Input Video Signal

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

 

 

internally terminated

 

 

 

 

 

Input Sync Signal

Type : Seperate H/V sync, Composite H/V, Sync-on-Green

 

Level : TTL level

 

 

 

 

 

AC power voltage & Frequency

AC 90 ~ 240V 60 Hz/50 Hz ± 3 Hz, DC 28V / 8A

 

 

 

 

 

Power Consumption

135W (max)

200W (max)

 

 

 

 

Dimensions

 

 

 

Unit (W x D x H)

29.9 x 20.0 x 1.9 Inches (760 x 506 x 49.0 mm)

39.6 x 28.1 x 2.3 Inches (1006 x 713 x 58.0 mm)

Carton (W x D x H)

29.9 x 22.4 x 7.7 Inches (760 x 569 x 195 mm)

39.6 x 29.4 x 11.8 Inches (1006 x 747 x 300 mm)

 

37.8 x 22.4 x 7.7 Inches (961 x 569 x 195 mm)

49.1 x 29.4 x 11.8 Inches (1248 x 747 x 300 mm)

 

 

 

 

Weight (Net / Gross)

11.2 kg (24.7 lbs)

21.5 kg (47.4 lbs)

 

13.7 kg (30.2 lbs)

28.0 kg (61.7 lbs)

 

16.0 kg (35.3 lbs)

32.0 kg (70.5 lbs)

 

 

 

 

Environmental Considerations

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

 

Humidity : 10 % ~ 80 %

 

 

Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)

 

Humidity : 5 % ~ 95 %

 

 

 

 

 

TV System

Color

 

NTSC-M

 

 

 

 

Sound

 

BTSC, A2 STEREO, EIAJ

 

 

 

 

Antenna Input

75Ω , Coaxial Cable

 

 

 

 

 

Sound Characteristics

•Max Internal speaker Out : Right c 10 W / Leftc 10 W

 

•Bass control Range : -6 ± -12dB ~ +6 ± 12dB

 

 

•TREBLE control Range : -10 ± -12dB ~ +10 ± 12dB

 

•Output frequency : RFc 80 Hz~15 KHz / A/Vc 80 Hz~20 KHz

 

•Line out : RFc 80 Hz~15 KHz / A/Vc 80 Hz~20 KHz

 

 

 

 

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

LT29A13W/LT40A13W

2-1

2 Product Specifications

2-2 PC Timing Chart

CONFIDENTIAL

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

Mode

VGA3/60 Hz

VGA/72 Hz

VGA/75 Hz

SVGA/56 Hz

SVGA/60 Hz

SVGA/72 Hz

SVGA/72 Hz

Timing

640 x 480

640 x 480

640 x 480

800 x 600

800 x 600

800 x 600

1280 x 768

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

fH (kHz)

31.5

37.9

37.5

35.2

37.9

48.1

47.7

 

 

 

 

 

 

 

 

A pixels

800

832

840

1024

1056

1040

1680

B pixels

96

40

64

72

128

120

136

C pixels

40

120

120

128

88

64

200

D pixels

640

640

640

800

800

800

1280

E pixels

8

16

16

24

40

56

64

 

 

 

 

 

 

 

 

fV (Hz)

60.0

72.8

75.0

56.3

60.3

72.2

60

 

 

 

 

 

 

 

 

O liues

525

520

500

625

628

666

795

P liues

2

3

3

2

4

6

3

Q liues

25

20

16

22

23

23

23

R liues

480

480

480

600

600

600

768

S liues

2

1

1

1

1

37

1

 

 

 

 

 

 

 

 

Clock

 

 

 

 

 

 

 

Freq.

25.175

31.500

31.500

36.000

40.000

50.000

80.136

(MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polarity

 

 

 

 

 

 

 

H.Sync

Negative

Negative

Negative

–/+

Positive

Positive

*

V.Sync

Negative

Negative

Negative

–/+

Positive

Positive

*

 

 

 

 

 

 

 

 

Remark

Separate

Separate

Separate

Separate

Separate

Separate

Separate

 

 

 

 

 

 

 

 

 

 

Separate Sync

 

 

Horizontal

 

 

Vertical

 

 

Video

 

 

Video

 

 

C C

DD

E E

Q Q

R R

S S

Sync

 

 

Sync

 

 

 

B

 

 

PP

 

 

B

 

 

 

 

A A

 

 

O O

 

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

 

 

 

 

 

LTM295W/LTM405W

2-2

2 Product Specifications

Table 2-2 Timing Chart (continued)

CONFIDENTIAL

Mode

SVGA/75 Hz

XGA/60 Hz

XGA/70 Hz

XGA/75 Hz

Timing

800 x 600

1024 x 768

1024 x 768

1024 x 768

 

 

 

 

 

 

 

 

 

fH (kHz)

46.9

48.4

56.5

60.0

A pixels

1056

1344

1328

1312

B pixels

80

136

136

96

C pixels

160

160

144

176

D pixels

800

1024

1024

1024

E pixels

16

24

24

16

fV (Hz)

75.0

60.0

70.1

75.0

O liues

625

806

806

800

P liues

3

6

6

3

Q liues

21

29

29

28

R liues

600

768

768

768

S liues

1

3

3

1

Clock

 

 

 

 

Freq.

49.500

65.000

75.000

78.750

(MHz)

 

 

 

 

Polarity

 

 

 

 

H.Sync

Positive

Negative

Negative

Positive

V.Sync

Positive

Negative

Negative

Positive

Remark

Separate

Separate

Separate

Separate

 

 

 

 

 

 

 

Separate Sync

 

 

Horizontal

 

 

Vertical

 

 

Video

 

 

Video

 

 

C C

DD

E E

Q Q

R R

S S

Sync

 

 

Sync

 

 

 

B

 

 

PP

 

 

B

 

 

 

 

A A

 

 

O O

 

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

 

 

 

 

 

 

 

 

 

LT29A13W/LT40A13W

2-3

2 Product Specifications

Memo

CONFIDENTIAL

2-4

LT29A13W/LT40A13W

CONFIDENTIAL

3 Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the LT29A13W/LT40A13W monitor.

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 metal instruments to pry apart the cabinet.

1.Remove 4 screws of the cover rear.

2. Remove the stand from LCD-TV.

LT29A13W/LT40A13W

3-1

3 Disassembly and Reassembly

 

CONFIDENTIAL

 

 

 

 

 

 

3. Remove 4 screws of the cover rear.

4. Pull the cover rear.

3-2 Reassembly

Reassembly procedures are in the reverse order of Disassembly procedures.

3-2

LT29A13W/LT40A13W

CONFIDENTIAL

Copyright

© 2002 by Samsung Electronics Co., Ltd.

All rights reserved.

This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Samsung Electronics Co., Ltd.

LT29A13W/LT40A13W Service Manual

First edition October 2002.

Printed in Korea.

Trademarks

Samsung is the registered trademark of Samsung Electronics Co., Ltd.

LT29A13W/LT40A13W and MacMaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd.

Macintosh, Centris, Quadra, Duo Douk, and Power Macintosh are trademarks of Apple Computer, Inc.

All other trademarks are the property of their respective owners.

ii

LT29A13W/LT40A13W

CONFIDENTIAL

4 Troubleshooting

4-1-1 No Picture (Lamp off, LED on)

LED Green or amber and lamp off.

No

Check the adaptor output is 28V?

Yes

No

No

Check the 3rd Pin of IC904 is 12V?

Yes

No

Check R934 (BKLPW) is 3.3V?

Yes

No

Check C928 is 14V?

Change power adaptor.

 

 

 

(BN44-00067B)

 

 

 

 

 

 

 

 

Check the tuner board power is 28V?

 

 

 

(29” : BN59-00321A, CN127 lst Pin)

 

 

 

 

 

 

(40” : BN59-00323A, CN28 lst Pin)

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

No

DC-DC defect.

 

 

 

 

 

Change main board.

 

 

 

(29” : BN94-00362A, 40” : BN94-00363A)

 

 

 

 

 

 

 

Tuner board defect.

 

 

 

Change tuner board.

 

 

 

 

 

 

(29” : BN59-00321A, 40” : BN59-00323A)

 

 

 

 

 

 

 

 

DC-DC defect.

 

 

 

Change main board.

 

 

 

 

 

 

 

 

 

 

 

DC-DC defect.

 

 

 

Change main board.

 

 

 

 

 

 

 

 

DC-DC defect.

Change main board.

Inverter defect contact HQ.

LT29A13W/LT40A13W

4-1

4 Troubleshooting

4-1-2 No Picture (RF Signal)

LED Green, Lamp on, No picture.

Check the cable connection?

No

 

(FPC, LVDS cable, IR/Tuner cable)

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

No

1 Check 46th Pin of IC1?

Yes

CONFIDENTIAL

Connect the cable.

Check 33V?

(29” : BN59-00321A, IC103 7th Pin)

(40” : BN59-00323A, IC4 7th Pin)

Yes

No

2 Check Pins 11th and 12th of CN3?

Yes

Tuner board defect. Change tuner board.

(29” : BN59-00321A, 40” : BN59-00323A)

No

IIC communication error.

Change main board.

IC1 defect.

Same as CVBS.

Change main board.

 

Check 88th Pin of IC2?

No

FT3 defect.

1

 

Change main board.

 

 

 

 

 

 

 

Check 48th and 40th Pin of IC1?

No

IC2 defect.

Change main board.

Check 55th and 46th Pin of IC302?

No

IC1 defect.

 

 

 

Same as S-Video.

 

 

 

 

 

 

Change main board.

 

 

 

 

3

 

4

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-2

 

 

 

 

 

 

 

LT29A13W/LT40A13W

4 Troubleshooting

Yes

CONFIDENTIAL

Check 9th, 17th and 23rd Pin of IC302?

No

Check X301.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

6

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IC302 defect.

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Change main board.

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X301 defect.

 

 

 

 

 

 

 

 

 

Change main board.

 

 

Check 159th, 165th and 168th

 

 

 

 

 

 

IC703 defect.

 

 

 

8

 

6

 

7

 

 

 

 

 

 

 

 

 

 

 

Change main board.

 

 

 

Pin of IC703?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Go to JAG ASM.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-1-3 No Picture (CVBS Signal)

LED Green, Lamp on, No picture.

 

 

Check the cable connection?

No

Connect the cable.

(FPC, LVDS cable, Component cable)

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

Check 1st Pin of CN1?

Component assy defect.

 

9

 

Change component assy.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(29” : BN59-00321A, 40” : BN59-00322A)

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

Same as RF.

 

 

 

 

 

 

 

 

 

 

LT29A13W/LT40A13W

4-3

4 Troubleshooting

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

2

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

5

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

8

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONFIDENTIAL

 

 

 

 

 

 

4-4

LT29A13W/LT40A13W

4 Troubleshooting

4-1-4 No Picture (S-Video Signal)

LED Green, Lamp on, No picture.

CONFIDENTIAL

Check the cable connection?

No

Connect the cable.

(FPC, LVDS cable, Component cable)

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check 4th and 6th Pin of CN1?

No

Component assy defect.

Change component assy.

 

 

 

 

 

 

 

 

11

 

10

 

 

(29” : BN59-00321A, 40” : BN59-00322A)

 

 

 

 

 

 

 

Same as RF.

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LT29A13W/LT40A13W

4-5

4 Troubleshooting

4-1-5 No Picture (D4 Signal)

LED Green, Lamp on, No picture.

Check the cable connection? (FPC, LVDS cable, Component cable)

Yes

Check 13th, 20th,

12

9th, 11th 16th and 18th Pin of CN1?

13

Yes

Check 15th, 19th and 21st

16

 

15

 

14

Check 64th, 66th and 67th

7

 

6

 

8

Pin of IC404?

Yes

Go to JAG ASM.

CONFIDENTIAL

No

Connect the cable.

No

Component assy defect.

Change component assy.

 

 

 

(29” : BN59-00321A, 40” : BN59-00322A)

No

IC403 defect.

Change main board.

No

IC404 defect.

Change main board.

4-6

LT29A13W/LT40A13W

4 Troubleshooting

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

7

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

13

 

 

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONFIDENTIAL

LT29A13W/LT40A13W

4-7

4 Troubleshooting

4-1-6 No Picture (PC Analog)

LED Green, Lamp on, No picture.

Check the cable connection? (FPC, LVDS cable, DVI cable)

Yes

Check 22rd and 24th Pin of CN201?

18 17

Yes

Check 30th, 31st and 67th

17

 

18

 

19

Check R808, R809,

23 22

R810 and R811 output of IC603?

20 21

Yes

Go to JAG ASM.

CONFIDENTIAL

No

Connect the cable.

No

Component assy defect.

Change component assy.

 

 

 

(29” : BN59-00321A , 40” : BN59-00322A)

No

IC203 defect.

Change main board.

No

IC603 defect.

Change main board.

4-8

LT29A13W/LT40A13W

4 Troubleshooting

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

 

 

18

 

 

 

 

19

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

21

 

 

 

 

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

CONFIDENTIAL

 

 

 

 

 

 

LT29A13W/LT40A13W

4-9

4 Troubleshooting

4-1-7 No Picture (PC Digital)

LED Green, Lamp on, No picture.

Check the cable connection? (FPC, LVDS cable, DVI cable)

Yes

Check 1st, 2nd, 4th, 5th, 7th, 8th, 10th and 11th Pin of CN201?

Yes

Check 44th, 46th, 47th

24 27 26

and 48th Pin of IC204?

25

Check R808, R809,

23 22

R810 and R811 output of IC603?

20 21

Yes

Go to JAG ASM.

CONFIDENTIAL

No

Connect the cable.

No

Component assy defect.

Change component assy.

 

 

 

(29” : BN59-00321A , 40” : BN59-00322A)

No

IC204 defect.

Change main board.

No

IC603 defect.

Change main board.

4-10

LT29A13W/LT40A13W

4 Troubleshooting

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

21

 

 

 

 

22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

 

 

 

 

24

 

 

 

 

25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

26

 

 

 

 

27

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONFIDENTIAL

LT29A13W/LT40A13W

4-11

4 Troubleshooting

4-2 JAG ASM

JAG ASM.

Yes

Check R812, R813,

28 29

and R814 output of IC801?

30

Yes

Check R303, R304,

28 29

and R302 output of IC603?

30

Check R307, R309, R311 and R313

31 33 32

output of IC201-1(BN41-00203A)?

34

Check 3.3V at R702 of IC700 and R730 output of IC701?

Check clock 10th, 11th, 22rd, 23rd Pin of CN701?

Panel defect.

CONFIDENTIAL

No

IC801 defect.

Change main board.

No

FPC defect.

Change main board.

No

RTA IC201 defect.

Change RTA board. (BN94-00372A)

No

IC603 defect.

Change main board.

No

RTA IC700, 701 defect.

 

Change RTA board.

 

 

4-12

LT29A13W/LT40A13W

4 Troubleshooting

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

 

 

 

28

 

 

 

 

29

 

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31

 

 

 

 

32

 

 

 

 

33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

CONFIDENTIAL

 

 

 

 

 

 

LT29A13W/LT40A13W

4-13

4 Troubleshooting

4-3 No Sound

Check the cable connection?

Yes

Sound Input?

35 RF : CN3, 14th, 16th Pin

CVBS, S-Video : CN1, 23rd, 24th Pin

D1 Input : CN1, 26th, 27th Pin

D2 Input : CN1, 29th, 30th Pin

Yes

Check 8V at 3rd Pin of IC501?

Yes

Check 5V at 3rd Pin of IC502?

Yes

36 Check 9th, 12th Pin of IC504?

Yes

Check 0V at 16th Pin of IC504?

Yes

37

Check 20th, 22th,

23rd and 25th Pin of IC504?

Check 1st, 2nd,

38

4th and 5th Pin of CN501?

Yes

Audio assy defect.

Change audio assy.

CONFIDENTIAL

No

Connect the cable.

No

Auto assy defect.

Change audio assy.

(29” : BN59-00320A, 40” : BN59-00322A)

No

IC501 defect.

Change main board.

No

IC502 defect.

Change main board.

No

IC503 defect.

Change main board.

No

Check the connection of headphone.

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

No

 

Disconnect headphone.

 

 

 

 

 

 

 

 

 

 

 

 

Audio assy defect.

 

 

 

Change audio assy.

 

 

 

 

 

 

(29” : BN59-00320A, 40” : BN59-00322A)

 

 

No

 

 

 

 

IC504 defect.

 

 

 

Change main board.

 

 

 

 

 

 

 

L502, L503, L504 and L505 defect.

Change main board.

4-14

LT29A13W/LT40A13W

4 Troubleshooting

WAVEFORMS

 

 

 

 

 

 

 

 

 

 

 

 

 

35

 

 

 

 

36

 

 

 

 

37

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

38

CONFIDENTIAL

 

 

 

 

 

 

LT29A13W/LT40A13W

4-15

4 Troubleshooting

Memo

CONFIDENTIAL

4-16

LT29A13W/LT40A13W

CONFIDENTIAL

5 Exploded View and Parts List

5-1 LT29A13W

LT29A13W/LT40A13W

5-1

Samsung lt29a13w service manual

5 Exploded View & Parts List

CONFIDENTIAL

5-2 LT40A13W

5-2

LT29A13W/LT40A13W

CONFIDENTIAL

6 Electrical Parts List

6-1-1 LT29A13W Main PCB Parts

Loc. No.

Code No.

Description

Specification

Remarks

 

 

 

 

 

-

BN94-00362A

ASSY PCB MAIN

AL29JO

SNA

CIS01

6001-000677

SCREW-MACHINE

RH,+,M3,L6,ZPC(YEL),SM20C,-

SNA

CIS04

0202-001044

SOLDER-WIRE.

S63S-W3.0,S63S,D3,63Sn/37Pb,-

SNA

CIS05

0202-001162

SOLDER-CREAM

RMA-20-21L,S63,-,SN63/PB36.6/AG0.4,FLUX9.5%

SNA

CIS06

0202-001172

SOLDER-WIRE FLUX

RS-107,RS60,D1.2,SN60/PB40,-

SNA

CIS07

0204-001096

ETHANOL

ISO-PROPYLENE,C2H50H,99.8%,-

SNA

CIS08

0204-001527

FLUX

DF-201TVS,MIX,0.820,FLUX 13%, 14KG

SNA

CIS99

BN73-00025A

RUBBER CUSHION

AL29NO,CR,10*15,60,T4,BLACK,3M #9448

SNA

CN2

3711-004261

CONNECTOR-HEADER

BOX,12P,1R,2MM,ANGLE,SN

SNA

CN501

3711-004123

CONNECTOR-HEADER

BOX,15P,1R,2mm,ANGLE,SN

SNA

CN950

3711-003846

CONNECTOR-HEADER

BOX,8P,1R,2mm,ANGLE,SN

SNA

IC1

1001-001037

IC-RF/VI/AUDIO S/W

TA8851CN,-,DIP,54P,600MIL,SING

 

L901

BN27-00012A

COIL CHOKE

5UH,APPOLO,5UH,10%,0.01OHM MAX,10A,PEI3210S,1T,40X70X25MM,BK,-10CTO+85C

 

X102

2801-003224

CRYSTAL-UNIT

32.768KHz,20ppm,28-AAY,12.5pF,

 

CIS02

BN96-00093A

ASSY MISC P-SHIELD/D-SUB

AL29NO,SPTE T0.5

SNA

CIS03

BN97-00115W

ASSY MICOM

AL29JO

 

IC105

1102-001108

IC-EPROM

27C020,256Kx8Bit,PLCC,32P,495MIL,70nS,5V,10%,PLASTIC,0to+70C,100uA,CMOS,TR

 

CIS

BN46-00014R

S/W MICOM-S/W

AL29JO

SNA

-

BN97-00150A

ASSY SMD

AL29JO

SNA

BD1

2703-001334

INDUCTOR-SMD

1.5uH,10%,2x1.25x0.85mm

 

BD2

2703-001334

INDUCTOR-SMD

1.5uH,10%,2x1.25x0.85mm

 

BD201

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD202

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD203

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD3

2703-001334

INDUCTOR-SMD

1.5uH,10%,2x1.25x0.85mm

 

BD301

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD302

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD303

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD304

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD4

2703-001334

INDUCTOR-SMD

1.5uH,10%,2x1.25x0.85mm

 

BD401

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD402

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD403

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD404

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD405

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD406

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD407

3301-001176

CORE-FERRITE BEAD

AB,2x1.25x0.9mm,-,-

 

BD501

3301-001145

CORE-FERRITE BEAD

AB,4.5x1.6x1.6mm,-,-

SNA

C1

2409-001065

C-ORGANIC

82UF,20%,16V,WT,TP,8X6.9MM,-

 

C10

2402-001155

C-AL,SMD

47UF,20%,16V,WT,TP,6.3X5.2MM

 

C1001

2402-001044

C-AL,SMD

100UF,20%,25V,GP,TP,8.3X8.3X6.3MM

 

C1002

2203-000257

C-CERAMIC,CHIP

10nF,10%,50V,X7R,TP,1608

 

C1003

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C1004

2203-005137

C-CERAMIC,CHIP

10uF,+80-20%,50V,JE,TP,5650,-

 

C1005

2203-005137

C-CERAMIC,CHIP

10uF,+80-20%,50V,JE,TP,5650,-

 

C1006

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C1007

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C1008

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C1009

2409-001035

C-ORGANIC

10uF,20%,10V,LZ,TP,5.4x4.3x4.3mm,1

 

C101

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C1010

2402-000176

C-AL,SMD

10uF,20%,16V,GP,TP,4.3x4.3x5.4

 

C1011

2402-000176

C-AL,SMD

10uF,20%,16V,GP,TP,4.3x4.3x5.4

 

C1012

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C1013

2203-000257

C-CERAMIC,CHIP

10nF,10%,50V,X7R,TP,1608

 

C1014

2203-005065

C-CERAMIC,CHIP

1000nF,+80-20%,10V,Y5V,TP,1608

 

C1015

2203-001851

C-CERAMIC,CHIP

0.016nF,5%,50V,NP0,TP,1608

 

C1016

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1017

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1018

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1019

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C102

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C1020

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1021

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1022

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1023

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

 

 

 

 

 

LT29A13W/LT40A13W

6-1

6 Electrical Parts List

CONFIDENTIAL

Loc. No.

Code No.

Description

Specification

Remarks

 

 

 

 

 

C1024

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1025

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1026

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1027

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1028

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1029

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C103

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C1030

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C1031

2203-001652

C-CERAMIC,CHIP

470nF,+80-20%,16V,Y5V,TP,1608

 

C104

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C105

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C106

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C107

2203-000815

C-CERAMIC,CHIP

0.033nF,5%,50V,NP0,TP,1608

 

C108

2203-000815

C-CERAMIC,CHIP

0.033nF,5%,50V,NP0,TP,1608

 

C109

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C11

2402-000170

C-AL,SMD

1uF,20%,50V,GP,TP,4.3x4.3x5.4,

 

C111

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C112

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C113

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C114

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C115

2203-000552

C-CERAMIC,CHIP

0.02nF,5%,50V,NP0,TP,1608

 

C12

2402-000176

C-AL,SMD

10uF,20%,16V,GP,TP,4.3x4.3x5.4

 

C13

2203-000440

C-CERAMIC,CHIP

1nF,10%,50V,X7R,TP,1608,-

 

C14

2402-000170

C-AL,SMD

1uF,20%,50V,GP,TP,4.3x4.3x5.4,

 

C15

2203-000236

C-CERAMIC,CHIP

0.1nF,5%,50V,NP0,TP,1608

 

C16

2203-000236

C-CERAMIC,CHIP

0.1nF,5%,50V,NP0,TP,1608

 

C17

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C18

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C19

2402-000209

C-AL,SMD

22uF,20%,16V,WT,TP,5.3x5.3mm,1

 

C2

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C20

2402-000209

C-AL,SMD

22uF,20%,16V,WT,TP,5.3x5.3mm,1

 

C201

2409-001035

C-ORGANIC

10uF,20%,10V,LZ,TP,5.4x4.3x4.3mm,1

 

C202

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C203

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C204

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C205

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C206

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C207

2409-001035

C-ORGANIC

10uF,20%,10V,LZ,TP,5.4x4.3x4.3mm,1

 

C208

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C209

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C210

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C211

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C212

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C213

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C214

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C215

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C216

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C217

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C218

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C219

2402-000176

C-AL,SMD

10uF,20%,16V,GP,TP,4.3x4.3x5.4

 

C22

2203-000257

C-CERAMIC,CHIP

10nF,10%,50V,X7R,TP,1608

 

C220

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C221

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C222

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C223

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C224

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C225

2402-000108

C-AL,SMD

10uF,20%,16V,WT,TP,4.3x4.3x5.4

 

C226

2203-000440

C-CERAMIC,CHIP

1nF,10%,50V,X7R,TP,1608,-

 

C227

2203-000440

C-CERAMIC,CHIP

1nF,10%,50V,X7R,TP,1608,-

 

C228

2203-000384

C-CERAMIC,CHIP

0.015nF,5%,50V,NP0,TP,1608

 

C229

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C23

2203-000189

C-CERAMIC,CHIP

100nF,+80-20%,25V,Y5V,TP,1608,

 

C230

2203-000440

C-CERAMIC,CHIP

1nF,10%,50V,X7R,TP,1608,-

 

C231

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

C232

2203-000843

C-CERAMIC,CHIP

39nF,10%,25V,X7R,TP,1608,-

 

C233

2203-000726

C-CERAMIC,CHIP

3.9nF,10%,50V,X7R,TP,1608,-

 

C234

2203-000972

C-CERAMIC,CHIP

47nF,10%,16V,X7R,TP,1608

 

C235

2203-000972

C-CERAMIC,CHIP

47nF,10%,16V,X7R,TP,1608

 

C236

2203-000972

C-CERAMIC,CHIP

47nF,10%,16V,X7R,TP,1608

 

C237

2402-000176

C-AL,SMD

10uF,20%,16V,GP,TP,4.3x4.3x5.4

 

C238

2203-005005

C-CERAMIC,CHIP

100nF,10%,16V,X7R,TP,1608

 

 

 

 

 

 

6-2

LT29A13W/LT40A13W

Loading...
+ 91 hidden pages