Samsung LE26R71B Schematic

TFT-LCD TV

Chassis Model GBD26KE LE26R71B GBR26KE LE26R72B GBD32KE LE32R71B GBR32KE LE32R72B GBR37KE LE37R72B GBD40KE LE40R71B GBR40KE LE40R72B

Manual

SERVICE

TFT-LCD TV Fashion Feature

- Luxurious Slim Design

- Supreme Picture Quality

- Supreme Sound Quality

- Supreme Convenience Quality

- Convenience for Users

LE26R71B,LE32R71B,LE40R71B

LE26R72B,LE32R72B,LE37R72B,LE40R72B

Samsung Electronics Co.,Ltd.

416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Gyeonggi-Do, Korea, 443-742 Printed in Korea P/N : BN82-00139B-00 URL : http://itself.sec.samsung.co.kr/

- 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.

3 Alignments and Adjustments

3-1

3 Alignments and Adjustments

3-1 Ser vice Instr uction

1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync.

2. Use the specified test equipment or its equivalent.

3. Correct impedance matching is essential.

4. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV. When inserting signal markers, do not allow the marker generator to distort test result.

5. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.

6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.

7. To protect aganist shock hazard, use an isolation transform.

3 Alignments and Adjustments

3-2

3-2 How to Access Service Mode

3-2-1 Entering Factory Mode

1. To enter "Service Mode" Press the remote -control keys in this sequence :

- If you do not have Factory remote - control

- If you have Factory remote - control

- The buttons are active in the service mode.

1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left Arrow Right, Menu, Enter, Number Key(0~9)

2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -, Menu, TV/VIDEO(Enter)

3-2-2 Panel Check

Specially for LE26,32R7**, You have to check Panel Maker Because of different adjustments as follows. First of all, Check the label rating!

1) Label Rating File

If Panel Mark is "A", Set the factory mode indicating as follows.

Panel BOM(Bill of material) : BN07-00289A Connector between Panel and Power Unit : BN39-00603M (300mm)

* Option Byte

1. Gamma "AUO"

2. Panel Option "AUO"

If Panel Mark is "S" or not printed. Set the factory mode indicating as follows.

Panel BOM(Bill of material) : BN07-00247A Connector between Panel and Power Unit : BN39-00603M (300mm) * Option Byte

1. Gamma "AMLCD"

2. Panel Option "AMLCD_INT" If Panel Mark is "C" , Set the Factory mode indicating as follows. Panel BOM(Bill of Material) : BN07-00207A Connecotor between Panel and Powe Unit : BN39-00659A(200mm) * Option Byte

1. Gamma " CMO "

2. Panel Option " CMO "

Others are same shown below.

INFO

MENU MUTE

3 Alignments and Adjustments

3-3

3-3 Factory Data

1. Calibration

2. Option Table XXXX XXXX

3. White Balance

4. SVP-FX

5. Option Block

6. STV8257/STA323W

7. YC Delay

8. Adjust

9. I2C Check

10. W/B MOVIE

11. Checksum

12. Reset

13. Spread Spectrum T-MILMPEU-1006 (Main Micom Ver) T-MILMPEUS-1002 (Sub Micom Ver)

Month / Day / Year / Hour / Min. / Sec.

1. Calibration

1) AV Calibration

2) DTV Calibration

3) PC Calibration

2. Option Table XXXX XXXX Inch Option 32" Carrier Mute ON TTX Group Auto

Gamma OFF Language English Auto Power ON

Panel Option AMLCD_INT Auto FM ON ---- OFF

2HDMI OFF High Deviation OFF ---- G

Brt.Sensor OFF TTX ON ---- OFF

EnergySave ON TTX List ON Debug OFF

LBE/FBE OFF ACR OFF Ch.Table SUWON FRC(Micronas) OFF Dynamic CE ON iDTV_Cntry UK FRC(Samsung) OFF Dynamic Dimming ON Dynamic Contrast OFF

LNA OFF Tuner TOP 10

3 Alignments and Adjustments

3-4

3 Alignments and Adjustments

3-5

3 Alignments and Adjustments

3-6

3-4 Ser vice Adjustment

3-4-1 White Balance - Calibration

If picture color is wrong, do calibration first.

Equipment : CA210, Patten : chess pattern Execute calibration in Factory Mode Source AV : PAL composite, Component : 1280*720/60Hz

PC : 1024*768/60Hz

3-4-2 White Balance - Adjustment

If picture color is wrong, check White Balance condition.

Equipment : CA210, Patten : Toshiba Adjust W/B in Factory Mode

Sub brightness and R/G/B Offset controls low light region Sub contrast and R/G/B Gain controls high light region Source AV : PAL composite, Component : 1280*720/60Hz

HDMI[DVI] : 1280*720/60Hz

Toshiba Patten

[ Test Pattern : MSPG-945 Series Pattern #16 ]

*Color temperature 1500K +/-500, -6 ~-20 MPCD

*Color coordinate H/L : 267/263 +/- 2 35.0 Ft +/- 2.0Ft L/L : 270/260 +/- 3 1.5 Ft +/- 0.2Ft

( chess patten )

3 Alignments and Adjustments

3-7

3-4-3 Conditions for Measurement

1. On the basis of toshiba ABL pattern : High Light level (57 IRE)

- INPUT SIGNAL GENERATOR : MSPG-925LTH * Mode NO 2 : 744X484@60 Hz

NO 6 : 1280X720@60 Hz NO 21 : 1024X768@60 Hz

* Pattern NO 36 : 16 Color Pattern

NO 16 : Toshiba ABL Pattern

2. Optical measuring device : CA210 (FL) Please use the MSPG-925 LTH generator for model

LE26M51B/LE32M51B/LE40M51B/LE46M51B

3-4-4 Method of Adjustment

1. Adjust the white balance of AV, Component and DVI Modes.

(AV Component)

a) Set the input to the mode in which the adjustment will be made

(RF DTV PC DVI).

* Input signal - VIDEO Mode : Model #2 (744*484 Mode), Pattern #16

- DTV,DVI Mode : Model #6 (1280*720 Mode), Pattern #16

- HDMI Mode: Model #6(1280*720 Mode), Pattern #16

b) Enter factory color control, confirm the data.

c) Adjust the low light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust sub - Brightness to set the 'Y' value.

- Adjust red offset ('x') and blue offset ('y') to the color coordinates.

* Do not adjust green offset data.

d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust red gain ('x') and blue gain ('y') to the color coordinates. * Do not adjust the green gain and sub-contrast (Y) data.

Picture 4-2 Toshiba ABL Pattern

Low light Measurement point

3 Alignments and Adjustments

3-8

d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust red gain ('x') and blue gain ('y') to the color coordinates. * Do not adjust the green gain and sub-contrast (Y) data.

Picture 4-3 Toshiba ABL Pattern

High light Measurement point

3 Alignments and Adjustments

3-9

3-5 Software Upgrade

3-5-1 How to Update Flash ROM

1. Installthe Flash Downloader ConnectSet(Service Jack)and Jig Cable to execute Program Update.

2. Flash Downloader program update

-Before Turning on the set,Click "connect"which is under of OSD Screen!

-Turn on the Set.

Memo

3 Alignments and Adjustments

3-10

7 Block Diagrams

7-1

7 Block Diagram

- This Document can not be used without Samsung’s authorization

M30840

LM4810

74HC

OPTION

STA323W

MAX232

SOUND OUT

FLASH MEMORY

AT49BV802

SUB

MICOM

7 Block Diagrams

7-2

Memo

13 Circuit Descriptions

13-1

13 Circuit Descriptions

13-1 Block description

Bordeaux consists of three main blocks

1. Main board : Video signal processing

2. IP board : Power supply & Inverter

3. T-con board : LCD Panel control

13 Circuit Descriptions

13-2

Bordeaux consists of three main blocks

1. Main board : Video signal processing

2. SMPS : Power supply

3. T-con board : LCD Panel control

SMPS

IINVERTER

13 Circuit Descriptions

13-3

13-2 Main Block

13 Circuit Descriptions

13-4

13-3 SMPS Board

13-3-1 26", 32" SMPS Block

13-3-2 26", 32" SMPS Block

13 Circuit Descriptions

13-5

13-3-3 26" , 32" SMPS Block

13-3-4 26" , 32" SMPS Block

13 Circuit Descriptions

13-6

13 Circuit Descriptions

13-7

13-3-5 32" , 40" IP Board

13-3-6 32" , 40" IP Board

Memo

13 Circuit Descriptions

13-8

photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Samsung Electronics Co., Ltd.

LE26R71B/LE26R72B/LE32R71B/LE32R72B/ LE37R72B/LE40R71B/LE40R72B Service Manual

First edition March 2006. Printed in Korea.

Trademarks

Samsung is the registered trademark of Samsung Electronics Co., Ltd. LE26R71B/LE26R72B/LE32R71B/LE32R72B/ LE37R72B/LE40R71B/LE40R72B and Macmaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd.

Macintosh and Power Macintosh are trademarks of Apple Computer, Inc.

All other trademarks are the property of their respective owners.

Contents

11. Precautions

………………………………………………………………………………………………………………………………………

11-1

1-1 Safety Precautions ……………………………………………………………………………………………………………………… 1-1

1-2 Servicing Precautions …………………………………………………………………………………………………………………… 1-2

1-3 Static Electricity Precautions …………………………………………………………………………………………………………… 1-2

1-4 Installation Precautions…………………………………………………………………………………………………………………… 1-3

2. Product specifications

…………………………………………………………………………………………………………………………

22-1

2-1 Fashion Feature…………………………………………………………………………………………………………………………… 2-1

2-2 LE26R71B / LE26R72B Specifications ………………………………………………………………………………………………… 2-2

2-3 LE32R71B / LE32R72B Specifications ………………………………………………………………………………………………… 2-3

2-4 LE37R72B Specifications………………………………………………………………………………………………………………… 2-4

2-5 LE40R71B / LE40R72B Specifications ………………………………………………………………………………………………… 2-5

2-6 Spec Comparison ………………………………………………………………………………………………………………………… 2-6

2-7 Option Specification ……………………………………………………………………………………………………………………… 2-7

3. Alignments and Adjustments

…………………………………………………………………………………………………………………

3-1

3-1 Service Instruction ……………………………………………………………………………………………………………………… 3-1

3-2 How to Access Service Mode …………………………………………………………………………………………………………… 3-2

3-3 Factory Data ……………………………………………………………………………………………………………………………… 3-3

3-4 Service Adjustment ……………………………………………………………………………………………………………………… 3-6

3-5 Software Upgrade ………………………………………………………………………………………………………………………… 3-9

4. Troubleshooting

………………………………………………………………………………………………………………………………

44-1

4-1 First Checklist for Troubleshooting ………………………………………………………………………………………………………4-1

4-2 Checkpoints by Error Mode ……………………………………………………………………………………………………………… 4-2

5. Exploded View and Parts List

…………………………………………………………………………………………………………………

55-1

5-1 LE26R71B Exploded View ……………………………………………………………………………………………………………… 5-1

5-2 LE26R71B Parts list ……………………………………………………………………………………………………………………… 5-2

5-3 LE26R72B Exploded View ……………………………………………………………………………………………………………… 5-3

5-4 LE26R72B Parts list ……………………………………………………………………………………………………………………… 5-4

5-5 LE32R71B Exploded View ……………………………………………………………………………………………………………… 5-5

5-6 LE32R71B Parts list ……………………………………………………………………………………………………………………… 5-6

5-7 LE32R72B Exploded View ……………………………………………………………………………………………………………… 5-7

5-8 LE32R72B Parts list ……………………………………………………………………………………………………………………… 5-8

5-9 LE37R72B Exploded View ……………………………………………………………………………………………………………… 5-9

5-10 LE37R72B Parts list …………………………………………………………………………………………………………………… 5-10

5-11 LE40R71B Exploded View …………………………………………………………………………………………………………… 5-11

5-12 LE40R71B Parts list …………………………………………………………………………………………………………………… 5-12

5-13 LE40R72B Exploded View …………………………………………………………………………………………………………… 5-13

5-14 LE40R72B Parts list …………………………………………………………………………………………………………………… 5-14

6. Electrical Parts List

……………………………………………………………………………………………………………………………

66-1

6-1 LE26R71BX/XEH Parts List……………………………………………………………………………………………………………… 6-1

6-2 LE26R72BX/XEC Parts List …………………………………………………………………………………………………………… 6-20

6-3 LE32R71BX/XEC Parts List …………………………………………………………………………………………………………… 6-34

6-4 LE32R72BX/XEH Parts List …………………………………………………………………………………………………………… 6-49

Contents

6-5 LE37R72BX/XEC Parts List …………………………………………………………………………………………………………… 6-63

6-6 LE40R71BX/BWT Parts List …………………………………………………………………………………………………………… 6-77

6-7 LE40R72BX/XEC Parts List …………………………………………………………………………………………………………… 6-92

7. Block Diagram

…………………………………………………………………………………………………………………………………

77-1

8. WWiring Diagram

…………………………………………………………………………………………………………………………………

88-1

8-1 LE26R71B/LE32R71B/LE40R71B/LE26R72B/LE32R72B/LE37R72B/LE40R72B Wiring Diagram …………………………… 8-1

8-2 Main Board Layout ……………………………………………………………………………………………………………………… 8-2

8-3 PIN characteristic ………………………………………………………………………………………………………………………… 8-3

8-4 Power Board Layout ……………………………………………………………………………………………………………………… 8-6

99. Schematic Diagrams

……………………………………………………………………………………………………………………………

99-1

9-1 Power_Sound Schematic Diagram ……………………………………………………………………………………………………… 9-1

9-2 Schematic Diagram ……………………………………………………………………………………………………………………… 9-2

9-3 Micom Schematic Diagram ……………………………………………………………………………………………………………… 9-3

9-4 SVP-PX/PX-Power/LBE-Option Schematic Diagram ………………………………………………………………………………… 9-4

9-5 Application Schematic Diagram ………………………………………………………………………………………………………… 9-5

10. Operating Instructions and Installation

………………………………………………………………………………………………………

110-1

10-1 Front …………………………………………………………………………………………………………………………………… 10-1

10-2 Connection Panel ……………………………………………………………………………………………………………………… 10-2

10-3 Remote control ………………………………………………………………………………………………………………………… 10-4

10-4 Installation the Stand ………………………………………………………………………………………………………………… 10-5

11. Disassembly and Reassembly

………………………………………………………………………………………………………………

111-1

11-1 Disassembly …………………………………………………………………………………………………………………………… 11-1

11-2 Reassembly …………………………………………………………………………………………………………………………… 11-5

12. PCB Diagram

…………………………………………………………………………………………………………………………………

112-1

12-1 26" Main PCB Diagram ……………………………………………………………………………………………………………… 12-1

12-2 32", 40" Main PCB Diagram ……………………………………………………………………………………………………………12-2

12-3 26" SMPS ……………………………………………………………………………………………………………………………… 12-3

12-4 32" SMPS ……………………………………………………………………………………………………………………………… 12-4

12-5 40" IP Board …………………………………………………………………………………………………………………………… 12-5

113. Circuit Descriptions

……………………………………………………………………………………………………………………………

113-1

13-1 Block description ……………………………………………………………………………………………………………………… 13-1

13-2 Main Block ……………………………………………………………………………………………………………………………… 13-3

13-3 SMPS Board …………………………………………………………………………………………………………………………… 13-3

14. Reference Infomation

………………………………………………………………………………………………………………………

114-1

14-1 Technical Terms ……………………………………………………………………………………………………………………… 14-1

14-2 Pin Assignments ……………………………………………………………………………………………………………………… 14-4

14-3 Timing Chart …………………………………………………………………………………………………………………………… 14-7

14-4 Panel Description …………………………………………………………………………………………………………………… 14-11

11 Disassembly and Reassembly

11-1

11 Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the TFT-LCD TV.

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

handling these components.

11-1 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.