Samsung LE23R32B, LE26R32B Service manual

SERVICE

Manual

LCD-TV

Features

LCD-TV

Chassis GRM23HEU

GRM26HEU

Model LE23R32B

LE26R32B

- HDMI/DVI, PC(Analog), 1 Component, 2 SCART, 1 Composite, S-Video, RF

- Brightness : 500cd/

- Contrast Ratio : 800:1

- Response time : 8ms

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

LE23R32B / LE23R32B Service Manual First edition March 2006.

Printed in Korea.

Trademarks

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

LE23R32B / LE23R32B and MacMaster Cable Adapter are trademarks of Samsung Electronics Co., Ltd.

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

All other trademarks are the property of their respective owners.

Contents

Samsung Electronics Co.,Ltd.

416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Gyeonggi-Do, Korea, 443-742 Printed in Korea P/N : BN82-00168C-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 General Alignment Instuction

1. Usually, a color LCD-TV 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 transformer.

3 Alignments and Adjustments

3-2

3-2 Factory Mode Adjustments

3-2-1 Entering Factory Mode

To enter 'Service Mode' Press the remote -control keys in this sequence :

- If you do not have Factory remote - control

3-2-2 Factory Mode Tree

- If you have Factory remote - control

[INFO] -> [FACTORY]

INFO MUTE Power OnMENU

1. Calibration

2. Option Byte

3. W/B

4. VCTi

5. YC Delay

6. FLI 5928

7. Adjust

8. Test Pattern

9. Password

10. Check Sum 0000

11. Spread spectrum

12. HDCP

13. DownLoad : Off

14. WatchDog Timer

15. Reset T_BRD23PEU-1004 Month/ Day / Year / Hour/ Min./Sec. P_TRNPEU-1002

Panel On Time(Hour) XXXXX

1. Calibration AV Calibration

DTV Calibration PC Calibration

3. White Balance Sub Bright : 128

R off set : 128 G off set : 128 B off set : 128 Sub contrast : 128 R gain : 128 G gain : 128 B gain : 128 Low Light : 274/274 1.0 +/- 0.15 High Light : 274/274 55 ÀÌ»ó

2. Option Byte Panel option :

23" AUO / 26" CMO

Dimming

: A_P3(AM7), P (CMO) Gamma : On Auto Power :

On Video Mute : 8 Language : English Hotel Mode : Off V-Chip : Off

Auto FM : Off High Dev. : Off TTX List : Flof MCC : Off TTX Group : User OSD Shop Mode : Off

------ : Off

VCTi VCTi Page 1

VCTi Page 2

3 Alignments and Adjustments

3-3

1. Calibration

2. Option Byte

3. W/B

4. VCTi

5. YC Delay

6. FLI 5928

7. Adjust

8. Test Pattern

9. Password

10. Check Sum 0000

11. Spread spectrum

12. HDCP

13. DownLoad : Off

14. WatchDog Timer

15. Reset T_BRD23PEU-1004 Month/ Day / Year / Hour/ Min./Sec. P_TRNPEU-1002

Panel On Time(Hour) XXXXX

5. YC Delay RF PAL-B/G : 5

RF PAL-D/K : 6 RF PAL-I : 5 RF PAL-L/L' : 5 RF SECAM-B/G : 2 RF SECAM-D/K : 0 RF SECAM-I : 2 RF SECAM-L/L : 5 RF NTSC 3.58 : 5 RF NTSC 4.43 : 5 AV PAL : 5 AV SECAM : 2 AV NTSC 3.58 : 5 AV NTSC 4.43 : 5 AV PAL 60 : 5

6. FLI 5928

Component Calibration--(ADC)

2. PC Calibration--(ADC)

3. ACC/ACM

4. TNR

5. Picture Enhance

6. Calibration Target

7. Adjust User Control lnitial

LNA PLUS Hotel Option

11. Spread Spectrum

Spread Spectrum : ON Spread Spectrum Range : 3 Step : 12 LVDS_ICTRL : 0 Memc Clk Freq0 : 122 Memc Clk Freq1 : 180 Sdram Clk Delay : 81 Sdram Drive0 : 52 Sdram Drive1 : 51

8. Test Pattern ------------ 0

10. Check Sum : XXXX

12. HDCP : XXXX

13. DownLoad On/Off

14. WatchDog Timer Off

15. Reset

9. Password : 80 80 80 80

3 Alignments and Adjustments

3-4

3-3 White Balance - Calibr ation

3-3-2 White Balance - Adjustment

3-3-1 White Balance -Calibration

3-3-3 Conditions for Measurement

1. Calibration

AV Calibration DTV Calibration PC Calibration (Calibration Condition refer to next page)

3. W/B

(low light) (high light)

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

- INPUT SIGNAL GENERATOR : MSPG-925LTH * Mode NO 2: 768 x 575 @ 50Hz(PAL composite)

NO 6 : 1280 x 720 @ 60 Hz (Component 720P) NO 21 : 1024 x 768 @ 60 Hz

Pattern

NO 24: chess pattern NO 16 : Toshiba ABL Pattern NO 17 : 16 gray

2. Optical measuring device : CA210 (FL) Please use the MSPG-925 LTH generator for model LE23R71BX.

(W/B adjustment Condition refer next page)

Sub Bright Sub Contrast R offset R gain G offset G gain B offset B gain

3 Alignments and Adjustments

3-5

2. Adjust the white balance of AV, Component and DVI Modes. a) Set the input to the mode in which the adjustment will be made (AV Component DVI). * Input signal - VIDEO Mode : Model #1 (744*484 Mode), Pattern #16

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

b) Enter factory W/B. c) Adjust the low light.

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

- Adjust red offset ('x') and blue offset ('y') to the color coordinates. ( x : 263, y : 267, Y : 1.3 ft) * Do not adjust green offset data.

3-3-4 Method of Adjustment

1. Adjust the basic level of A/V and Component and PC input signals.

a) Set the input to the mode in which the adjustment will be made(A/V -> Component -> PC). * Input signal - A/V Mode : Mode#2(768 x 575@50Hz), Pattern #24 ( picture 3-1 )

- Component Mode : Model # 6 ( 1280*720 @ 60Hz ) , Pattern #15 ( picture 3-2 ).

- PC Mode : Model #21 ( 1024*768 @ 60Hz ) , Pattern #17 ( picture 3-3 ). b) Enter Factory Calibration ( A/V , DTV , PC Mode Only). * AV Calibration -> Source change for Component -> DTV Calibration -> Source change for PC -> PC

Calibration

Picture 3-3 16gray

Picture 3-2 Color barPicture 3-2 Color bar

Picture 3-1 Chess pattern

3 Alignments and Adjustments

3-6

Picture 3-4 Toshiba ABL Pattern

High light Measurement point

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. ( x : 263, y : 267 ) * Do not adjust the green gain and sub-contrast (Y) data.

Picture 3-3 Toshiba ABL Pattern

Low light Measurement point

3 Alignments and Adjustments

3-7

3-4 Bordeaux Micom Update

3-4-1 Installing G-Probe

1. Uncompress GProbe5.1.0.18.zip.

2. Run GProbe5.1.0.18.exe.

3. The files are created in the C:

Program Files Genesis Microchip GProbe 5 folder.

4. Copy the ispoak_spi.hex file to the C:

Program Files Genesis Microchip GProbe 5 folder.

5. Copy the bordeaux.txt, torino.txt file to the C:

Program Files Genesis Microchip GProbe 5 folder.

(bordeaux.txt or torino.txt have the command list to download. The file name should be changed.)

6. Execute the 'Gprobe 5'

7. Click the 'connection settings' button.

8. Change the connection from 'Serial' to 'Parallel'

3 Alignments and Adjustments

3-8

9. Set the 'Pin assignments'

3-4-2 Connecting the download JIG to the MAIN PCB

Connect the DDC manager from Parallel of PC to D-sub of set.

3 Alignments and Adjustments

3-9

3-4-3 Update Procedures

1. Execute the 'Gprobe 5'

2. Open the command list file(ex. bordeaux.txt or torino.txt. The file name should be changed.)

1) Click the Button to open the file>

2) Open the command list file.

3 Alignments and Adjustments

3-10

3) You can see the file contents. It's command lists. (In this case the command file is insam.txt for example.)

4) Check the the SOFT name and path to download. (For example T-BRD23US-0152.hex is used at insam folder in C driver)

3. Enter to '13.download' mode in service menu.

4. Check the connection with 'test' command. If you can get 'Test passed.' massage, the connection is OK or else check the Jig cable.

5. Execute the command list file. For it enter 'batch file name.txt'.

If you can get 'Batch: command Successful' massage Download is all done.

test

3 Alignments and Adjustments

3-11

3 Alignments and Adjustments

3-12

Memo

7 Block Diagrams

7-1

7 Block Diagram

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

7 Block Diagrams

7-2

Memo

13 Circuit Descriptions

13-1

13 Circuit Descriptions

13-1 Block description

consists of three main blocks

1. Main board : Video signal processing

2. SMPS board : Power supply

3. Panel Inverter & T-con board : LCD Panel control

13 Circuit Descriptions

13-2

VCTi : IF AV1/2, S-Video input and video decoding, Audio signal processing.

FLI5928H : - Scaler IC.

- Component, PC, HDMI/DVI input and LVDS signal output.

BA7657 : component 1/2, Switching IC.

13-2 Main Block

13 Circuit Descriptions

13-3

13-3 SMPS Board

13-3-1 SMPS Diagram (Free_Volt)

Memo

13 Circuit Descriptions

13-4

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 LE23R32B 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.

Description Picture Description

1. Place LCD TV face down on cushioned table. Remove 13 screws from the rear cover. Remove 2 screws from the jack cover

11 Disassembly and Reassembly

11-2

3. Disconnect cables and remove screws from the boards.

Description Picture Description

2. Remove stand and lift up the rear cover.

11 Disassembly and Reassembly

11-3

5. Lift up the stand brkt and remove 8 screws from the panel brkt.

Description Picture Description

4. Lift up the boards and remove screws from the stand brkt.

11 Disassembly and Reassembly

11-4

7. LCD panel

Description Picture Description

6. Lift up the brkt and LCD panel.

11 Disassembly and Reassembly

11-5

11-2 LE26R32B 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.

Description Picture Description

1. Place LCD TV face down on cushioned table. and Remove the Stand 13 screws from the rear cover.

11 Disassembly and Reassembly

11-6

3. Disconnect cables and remove screws from the boards

Description Picture Description

2. lift up the rear cover. Remove 2 screws and lift up the jack cover.

11 Disassembly and Reassembly

11-7

5. Remove 6 screws from the stand brkt and Lift up the Stand brkt.

Description Picture Description

4. Lift up the main board. Remove 2 screws.

+ 103 hidden pages