Samsung LE40F71B, LE46F71B Schematic

TFT-LCD TV

Chassis GFM40SRU

GFM46SRU

Model LE40F71B

LE46F71B

Manual

SERVICE

TFT-LCD TV Fashion Feature

- Luxurious Slim Design

- Supreme Picture Quality

- Supreme Sound Quality

- Supreme Convenience Quality

- Convenience for Users

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

LE40F71B / LE46F71B Service Manual First edition June 2006.

Printed in Korea.

Trademarks

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

LE40F71B / LE46F71B 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 : BN82-00145B-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

" "

- 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)

Power OFF

PICTURE ON

INFO

DISPLAY

MUTE

FACTORY

Power ON

3 Alignments and Adjustments

3-3

3-3 Factory Data

1. Calibration

2. Option Table XXXX XXXX

3. White Balance

4. SVP-PX

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-FHDMPEU-0000 T-BRDMPEUS-0000 T-MSLMPEUW-0000

1. Calibration

1) AV Calibration

2) Comp Calibration

3) PC Calibration

4) HDMI Calibration

2. Option Table XXXX XXXX Inch Option 40" Carrier Mute OFF TTX Group Auto

Gamma AMLCD Language English Auto Power ON

Panel Option AMLCD_INT Auto FM ON Magazine LNA OFF

2HDMI ON High Deviation OFF VOL MODE SMALL

Brt.Sensor OFF TTX ON ---- OFF

EnergySave OFF TTX List Flof Debug OFF

LBE/FBE ON ACR OFF Ch.Table SUWON

FRC(Micronas) OFF Dynamic CE ON iDTV_Cntry UK

FRC 2X OFF Dynamic Dimming ON Dynamic Contrast OFF

LNA ON Tuner TOP 8

3 Alignments and Adjustments

3-4

3. White Balance

4. SVP-PX

1) ComB Filter

2) Sharpness

3) NR

No.

Item

1 2 3 4 5 6 7 8

H2 Gain H4 Gain V2 Gain

V4 Gain

Sr2 Gain

Sr4 Gain

05H 02H

0CH

04H 02H 00H

Sl2 gain

Sl4 gain Peakth 1 Peakth 2 Peakth 3

02H 08H 04H 2FH 3FH

Sub-Briteness

R-offset G-offset B-offset

Sub-Contrast

R-Gain G-Gain

B-Gain

TV/AV

Component

130 128 128 128 145 128 128 128

DVI (HDMI)

5) ADC Calibration TCD3

TCD3 TCD3 TCD3

Analog

Contrast

CR CB

Delay

Y offset

78H 20H 80H 00H

3DH

Y_NR_OFF

C_NR_OFF

Y_NR_ON C_NR_ON

80H

4) RGB Calibration

R-offset G-offset B-offset

R-Gain G-Gain B-Gain

48H 48H 48H 39H 39H 39H

Analog

Black level

SVP Brightness

PB offset PR offset

Y-Gain PB-Gain PR-Gain

80H 80H B7H 9AH 9AH 00H 00H

3 Alignments and Adjustments

3-5

6) Calibration Target

AV ADC

COMP ADC

PC ADC

ALL RGB

low

17 0FH 17H 00H

high

D5H EBH D5H DDH

delta

02H 02H 04H 08H

Ch1 Volume Ch2 Volume

AGC Gain

AV-Prescale

4BH 4BH

07H 00H

AV delay Comp delay HDMI delay

PC delay

L1 Att / Rel Thres

41H 41H 41H 41H 7FH

7) Color Management Skin Direction

Skin Enhance Green Stretch

Blue Stretch

Reddish

40H 00H 00H

6. STV 8257 / STA 323W

RF PAL - B/G RF PAL - D/K

RF PAL - I

RF SECAM B/G

RF SECAM D/K

RF SECAM L/L'

AAH

99H

RF SECAM -B/G

44H 88H

RF NTSC 3.58 RF NTSC 4.43

AV PAL

AV SECAM AV NTSC 3.58 AV NTSC 4.43

AV PAL 60

66H CCH

AAH

88H

BBH

AAH

77H

7. YC Delay(TV)

5. Option Block FRC (Micronas) FRC 2X LBE / FBE

8. Adjust Video mute time 10 Melody volume 9 Ana_Dimm_Max FEH LNA PLUS Hotel Option

9. I2C Check

3 Alignments and Adjustments

3-6

WB movie Off

color mode Movie

W1 R Gain 157 W1 B Gain 157

W1 R Offset 157

W1 B Offset 157

W2 R Gain 142

W2 B Gain 48 W2 R Offset 129 W2 B Offset 143

Movie contrast 80

Movie Brightness 65

Movie color 35

Movie sharpness 35

Movie colortone warm 2

10. W/B movie

11. Checksum

12. Reset

13. Spread Spectrum Spectrum on Delta 0 Positive 8 Negative 2

3 Alignments and Adjustments

3-7

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 x 720/60Hz

Component: 720P

PC: 1024*768/60Hz

HDMI: 720P

3-4-2 White Balance - Adjustment

If picture color is wrong, check White Balance condition.

Equipment : CA210, Patten : New W/B Pattern 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 x 720/60Hz

HDMI[DVI] : 1280 x 720/60Hz

New W/B Pattern

[ Test Pattern : MSPG-945 Series Pattern #92 ]

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

*Color coordinate H/L : 272/278 +/- 5 L/L : 272/278 +/-5 3.8ft +/- 0.2ft

( chess patten )

3 Alignments and Adjustments

3-8

3-4-3 Conditions for Measurement

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

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

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

* Pattern NO 17 : 16 Gray Pattern

NO 92 : Combination Pattern

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

LE40F71B

3 Alignments and Adjustments

3-9

1. You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance).

2. Since the adjustment value and the data value vary depending on the input source, you have to adjust these in AV, Component 1 and HDMI 1 modes.

3. The optimal values for each mode are configured by default. (Refer to Table 1, 2.)

It varies with Panel's size and Specification.

- Equipment : CS-210

- Pattern: MIK K-7256 #92 "Flat W/B Pattern" as standard

- Use other equipment only after comparing the result with that of the Master equipment.

- Set Aging time : 60min

- Calibration and Manual setting for WB adjustment. HDMI : Calibration at #24 Chessboard Pattern Manual adjustment #92 pattern (720p) COMP: Calibration at #24 Chessboard Pattern Manual adjustment at #92 pattern (720p) AV Calibration at #24 Chessboard Pattern Manual adjustment at #92 pattern

- If finishing in HDMI mode, adjustment coordinate is almost same in AV/COMP mode.

278

L/L

H/L

L/L

H/L

L/L

T(K) + MPCD

Y (cd/m

)

13.2cd/m

278

Adjustment Coordinate (LE40F71B)

272

12,000

Component

(720P)

HDMI

(720P)

- White Balance Manual Adjustment

- Adjustment Specification White Balance : High light ( 2), Low light ( 3) Luminance : High light (Don't care), Low light ( 0.2 Ft/L)

3-5 White Ratio (Balance) Adjustment

3 Alignments and Adjustments

3-10

3-6 Ser vicing Infor mation

3-6-1 USB Download Method

(1) Copy the Software file into the USB flash driver. (2) Turn on your LCD TV and check the source is 'Analog TV Mode'. (3) Insert the USB flash driver into the USB Jack of LCD TV. (4) Press 'Mute'+'7'+'8'+'9'+'Exit' keys of your remote control. (5) The banner osd "Updating SW..." is displayed. (6) The banner osd "Completed..." is displayed when the updating is completed. (7) Remove the USB flash driver from LCD TV. (8) Check the program version.

* How to check Program Version

1. Press " MENU "

2. Select " SET UP "

3. Select " INFORMATION HELP "

4. Highlight " ON " option

5. Press " INFO " button on the remote control

L/L

H/L

L/L

H/L

L/L

T(K) + MPCD

Y (cd/m

)

13.2cd/m

283

Adjustment Coordinate (LE46F71B)

268

268 283

283

268

12,000

Component

(720P)

HDMI

(720P)

- Adjustment Specification White Balance : High light (

2), Low light ( 3)

Luminance : High light (Don't care), Low light (

0.2 Ft/L)

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

Mosel 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

Mosel consists of three main blocks

1. Main board : Video signal processing

2. SMPS : Power supply

3. T-con board : LCD Panel control

13 Circuit Descriptions

13-3

13-2 Main Block

13 Circuit Descriptions

13-4

13-3 IP Board

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 (LE40F71BX)

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 monitor face down on cushioned table. Remove screws from the Stand. Remove stand.

11 Disassembly and Reassembly

11-2

3. Disconnet cables from the main and power boards Remove screws from the side AV jack.

Description Picture Description

2. Remove screws from the rear-cover and lift up the rear-cover.

11 Disassembly and Reassembly

11-3

5. Lift up the speakers. Remove screws from the BRKT.

Description Picture Description

4. Remove screws from the boards and stand BRKT.

11 Disassembly and Reassembly

11-4

7. Lift up the panel BRKT.

Description Picture Description

6. Lift up the Panel and remove screws.

11 Disassembly and Reassembly

11-5

11-2 Disassembly (LE46F71BX)

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 monitor face down on cushioned table. Remove screws from the Stand. Remove stand.

11 Disassembly and Reassembly

11-6

3. Disconnet cables from the main and power boards Remove screws from the side AV jack.

Description Picture Description

2. Remove screws from the rear-cover and lift up the rear-cover.

11 Disassembly and Reassembly

11-7

5. Lift up the speakers. Remove screws from the BRKT.

Description Picture Description

4. Remove screws from the boards and stand BRKT.

11 Disassembly and Reassembly

11-8

7. Lift up the panel BRKT.

Description Picture Description

6. Lift up the Panel and remove screws.

11 Disassembly and Reassembly

11-9

11-3 Reassembly

Reassembly procedures are in the reverse order of disassembly procedures.

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