Samsung LA26A450C1 Schematic

LCD-TV

SERVICE

Manual

TFT-LCD TV Contents

LA26A450C1/LA26A350C1

/LA32A450C1/LA32A350C1

LA37A450C1/LA37A350C1

Refer to the service manual in the GSPN (see the rear cover) for the more information.

Chassis : GCR26ASA GCR32CCN GCR32TSA GCR37ASA GCR37CCN Model : LA26A450C1 LA26A350C1 LA32A450C1 LA32A350C1 LA37A450C1 LA37A350C1

1. Precautions

2. Product specications

3. Disassembly and

Reassembly

4. Troubleshootin

5. Exploded View & Part Lis

6. Wiring Diagra

7. Schematic Diagra

Contents

1. Precautions .............................................................................................................. 1-1

1-1. Safety Precautions ......................................................................................................... 1-1

1-2. Servicing Precautions .....................................................................................................1-2

1-3. Electrostatically Sensitive Devices (ESD) Precautions .................................................. 1-2

1-4. Installation Precautions .................................................................................................. 1-3

2. Product specications ............................................................................................ 2-1

2-1. Feature & Specications ................................................................................................. 2-1

2-3. Spec Comparison to the Old Models .............................................................................. 2-6

2-4. Accessories .................................................................................................................... 2-7

3. Disassembly and Reassemble ............................................................................... 3-1

3-1. Disassembly ................................................................................................................... 3-1

4. Troubleshooting ...................................................................................................... 4-1

4-1. Troubleshooting .............................................................................................................. 4-1

4-2. Alignments and Adjustments ........................................................................................ 4-15

4-3. Factory Mode Adjustments ........................................................................................... 4-16

4-4. White Balance - Calibration .......................................................................................... 4-19

4-5. White Ratio (Balance) Adjustment ................................................................................ 4-21

4-6. HOW TO UPGRADE .................................................................................................... 4-22

5. Exploded View & Part List ...................................................................................... 5-1

5-1. LA26A450C1X / LA26A350C1X Exploded View ............................................................ 5-1

5-2. LA32A450C1X / LA32A350C1X Exploded View ............................................................ 5-3

5-3. LA37A450C1X / LA37A350C1X Exploded View ............................................................ 5-5

5-4. LA26A450C1X Parts List ................................................................................................ 5-7

5-5. LA32A450C1X Parts List .............................................................................................. 5-32

5-6. LA37A450C1X Parts List .............................................................................................. 5-57

6. Wiring Diagram ........................................................................................................ 6-1

6-1. Wiring Diagram ............................................................................................................... 6-1

6-2. Wiring Picture ................................................................................................................. 6-4

6-3. Connector Functions ...................................................................................................... 6-5

6-4. Cables ............................................................................................................................ 6-6

GSPN (Global Service Partner Network)

Area Web Site

North America

http://service.samsungportal.com

Latin America

http://latin.samsungportal.com

CIS http://cis.samsungportal.com

Europe http://europe.samsungportal.com

China http://china.samsungportal.com

Asia http://asia.samsungportal.com

Mideast & Africa

http://mea.samsungportal.com

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.

Printed in Korea P/N: BN82-00339B-00

GSPN (Global Service Partner Network)

Area Web Site

North America

http://service.samsungportal.com

Latin America

http://latin.samsungportal.com

CIS http://cis.samsungportal.com

Europe http://europe.samsungportal.com

China http://china.samsungportal.com

Asia http://asia.samsungportal.com

Mideast & Africa

http://mea.samsungportal.com

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.

Printed in Korea P/N: BN82-00339B-00

4-1

4. Troubleshooting

4-1. Troubleshooting

Check the various cable connections rst.

• Check to see if there is a burnt or damaged cable.

• Check to see if there is a disconnected or loose cable connection.

• Check to see if the cables are connected according to the connection diagram.

Check the power input to the Main Board. Check internal Pattern FBE3 if there is some picture noise. FBE3: Factory mode(Info - MENU - MUTE - power on_ -> 4. Advanced menu -> Option block-> FBE->Pattern Select Press right button of Remocon. If FBE3 NG,change the main Board

4-2

4. Troubleshooting

4-1-1. No Power

Symptom

The LEDs on the front panel do not work when connecting the power cord. The SMPS relay does not work when connecting the power cord. The units appears to be dead.

Major

checkpoints

The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:

Check the internal cable connection status inside the unit. Check the fuses of each part. Check the output voltage of SMPS. Replace the Main Board.

Diagnostics

Caution

Make sure to disconnect the power before working on the IP board.

Does proper DC A3.3V

appear at C1040?

Check a IC1011

Change a main PCB ass’y

Yes

Does proper DC 5V, 3.3V, 1.2V appear

at C1005, C1038, C1063?

Yes

LAMP off, power indicator

LED red color?

Yes

Check a connection a power cable.

Does proper DC 13V appear at

pin20 of CN1001?

Yes

A power is supplied to set?

Change a Assy PCB Power.

Check a IC1006, IC1012.

Change a main PCB ass’y

4-3

4. Troubleshooting

4-1-2. No Video (Analog PC signal)

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the PC source Check the M-star This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

PC cable. Change a PC

cable. Change a main PCB ass’y.

Does the digital data appear at the

output of LVDS (R6048~6045_FBE)?

Power Indicator is off.

Lamp on, no video.

Check a PC source and check

the connection of DSUB cable?

Check a IC6001.

Change a main PCB ass’y

Yes

Check a LVDS cable?

Replace a lcd panel?

Does the signal appear at C5050,

C5049, C5047(R,G,B) of IC5001

Please, Call to Samsung Co. LTD.

Yes

Input a analog PC signal and

connected cable(DPMS).

Yes

Caution Make sure to disconnect the power before working on the IP board.

4-4

4. Troubleshooting

WAVEFORMS

R,G,B Output Signal

4-5

4. Troubleshooting

4-1-3. No Video (HDMI - Digital Signal)

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the HDMI source

Check the M-star

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

Does the digital data appear at

R5055~5062,R5066~5073?

Power Indicator is off.

Lamp on, no video.

Check the connection

of HDMI cable?

Check a IC1402.

Change a main PCB ass’y.

Check a IC1401.

Change a main PCB ass’y.

Does the digital data appear at output of

IC5001(R6048~6045_FBE)?

Check the LVDS cable?

Replace the LCD panel?

Please, Contact Tech support

Yes

Input a HDMI cable.

Yes

Caution Make sure to disconnect the power before working on the IP board.

4-6

4. Troubleshooting

WAVEFORMS

Digital Output Data

Signal of HDMI(Data)

4-7

4. Troubleshooting

4-1-4. No Video (Tuner_CVBS)

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the Tuner CVBS source

Check the M-star

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

Check a B+ voltage (#7of Tuner) 5V,

change a main PCB ass’y.

Power Indicator is off.

Lamp on, no picure.

Yes

Change a main PCB ass’y.

Does the signal appear at R3235?

[4] Does the signal appear at C5068

of IC5001?

Check the LVDS cable?

Replace the LCD panel?

Please, Call to Samsung Co. LTD.

Yes

Connect the RF cable and

check RF signal.

Yes

Caution Make sure to disconnect the power before working on the IP board.

4-8

4. Troubleshooting

WAVEFORMS

CVBS Output Signal

Tuner_CVBS Output Signal

4-9

4. Troubleshooting

4-1-5. No Picture (Video_CVBS)

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the Video Source

Check the M-star

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

Check a connection harness.

Power Indicator is off.

Lamp on, no picture.

Yes

Does the signal appear at C5064

or C5061 of IC5001?

Check a LVDS cable ?

Replcelcd panel?

Please, Call to Samsung Co. LTD.

Yes

Check a A/V cable and video signal.

Yes

Caution Make sure to disconnect the power before working on the IP board.

4-10

4. Troubleshooting

WAVEFORMS

CVBS Output Signal

4-11

4. Troubleshooting

4-1-6. No Picture (S-VIDEO_Y,C)

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the S-Video_Y,C source

Check the M-star

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

Check a connection harness.

Power Indicator is off.

Lamp on, no picure.

Does the Y/C signal appear at

C5062or C5063 of IC5001?

Check a LVDS cable ?

Replcelcd panel?

Please, Call to Samsung Co. LTD.

Yes

Connect the s-video cable.

Operating a video player.

Yes

Caution Make sure to disconnect the power before working on the IP board.

4-12

4. Troubleshooting

WAVEFORMS

Digital Output Data

Analog Signal(Y,C)

4-13

4. Troubleshooting

4-1-7. No Sound

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the RF Source

Check the M-star

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

Check a connection harness and

headphone jack./Side AV

Check Sound Processor

IC5001 (M-star)

Picture is display, no sound.

Check a B12V Line.

Change a main PCB ass’y

Does the signal appear at pin 232, 236,

234,237(I2S_CLK, I2S_SCLK, I2S_

LRCLK, I2S_DATA) of IC1201?

Check the DC 12V

of IC2001?

Change a main PCB ass’y.

Does the signal appear at

Pin 47 or 48, 53 or

54(CH1_L, R Sound) And Pin

36 or 37, 30 or 31

(CH2_L, R Sound) of IC2001?

Replace the speaker ass’y?

Yes

Connect a sound cable.

control a volume.

Yes

Caution Make sure to disconnect the power before working on the IP board.

4-14

4. Troubleshooting

WAVEFORMS

The Signal are Inputed to IC1201

The Signal are Inputed to IC1202

4-15

4. Troubleshooting

4-2. Alignments and Adjustments

4-2-1. General Alignment Instuction

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

Use the specied test equipment or its equivalent.

Correct impedance matching is essential.

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.

Connect the TV only to an AC power source with voltage and frequency as specied on the backcover nameplate.

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.

To protect against shock hazard, use an isolation transformer.

4-16

4. Troubleshooting

4-3. Factory Mode Adjustments

4-3-1 Entering Factory Mode

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

- If you do not have Factory remote - control

MENUINFO MUTE Power on

- If you have Factory remote - control

DISPLAYPICTURE ON FACTORY

- 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)

4-3-2 Panel Check

You have to check Panel Maker Because of different adjustments as follows. First of all, Check the label rating!

1) Label Rating File

- LCD PANEL MARK A:ACER(AUO) S : SEC C : CMO

* If not printed you could consider S(sec) panel mark.

4-17

4. Troubleshooting

4-3-3 Factory Data

Option Table(Service)

WB Adjust

Information

Advanced Menu Checksum T-CRL32MEAM-**** HDCP Success

Month/Day/Year/Hour/MIN/SEC

Option Table(Service)

26” Option

No Item Range Option

1 Factory Reset

2 Country(0x55) Default_0

3 Ready ON/OFF ON

4 Inch Option

19/22/23/26/27/32/37/40

/42/46/50/52/57

26/32/37

5 Dimm Type INT/INT_NEG/EXT_POS/EXT_NEG/EXT/ INT

6 Panel Type

19AM_TN/22AU_TN/22CM_TN/26AM_AG/ 26AU_AG/26CM_NG/32AU_AG/32AU_NG/ 32CM_NG/32CM_AG/37AU_AG/37CP_AG/

40AU_AG/40AM_AG

26AM_AG/ 32AU_AG/

37CP_AG

7 Model Option

Coral/Jade/Tanzanite/Pyrope/Amber Pyrope_3D/Carnelian/Carnelian_3D

Coral

8 Anynet + ON <-> OFF ON

9 Light Effect ON <-> OFF OFF

10 TTX ON <-> OFF ON

11 TTX List List <-> FLOF FLOF

12 TTX Group

Lang OSD/ W Europe/Russia/Greek/Turek/ Arab/Farsi/

ArabHbrw

Lang OSD

13 Carrier Mute ON <-> OFF OFF

14 High Devi ON <-> OFF OFF

15 Volume Curve EA/EU EA

16 HotPlug ON <-> OFF ON

17 HotPlugCtrl ON <-> OFF ON

18 HotPlugDelay 0 ~ 63 12

19 Auto Power ON <-> OFF ON

20 LNA Menu OFF OFF

21 Hotel Option On <-> Off OFF

22 D.Gamma OFF/0.85/0.88/0.90/0.93/0.95/0.98/ M1/M2/M3/M4 0.98/0.93/0.93

23 PC Ident ON <-> OFF

24 Language Europe/CIS (21 Language) English

25 Ch Table SUWON/SESK/SHE/etc Select Local area

26 DDR Etron

27 Shop Mode ON <-> OFF OFF

28 Nordic OFF

29 Arabic ON <-> OFF ON

30 NT Conversion ON <-> OFF OFF

4-18

4. Troubleshooting

No Item Range Option

31 Control -

WM Calib ON/OFF OFF

EDID Protect ON/OFF ON

Edid Type Coral/P450-50HP/P450-42HP L12_1366_768

EDIE Write Failure/Success L12_1366_768 Succes

WB Data Reset ON <-> OFF OFF

EEPROM Reset

Logic Download ON <-> OFF OFF

32 PDP Filter 42” 3D

33 PDP Group P34A_R3d

34 Spread Spectrum ON/OFF ON

Step1 0~255 30

Step2 0~255 9

Range1 - 0

Range2 - 44

FBE SSC - 5

4-19

4. Troubleshooting

4-4. White Balance - Calibration

4-4-1 White Balance -Calibration

1. Calibration

AV Calibration

Comp Calibration

PC Calibration

HDMI Calibration

4-4-2 Service Adjustment -

You must perform Calibration in the Lattice Pattern before adjusting the White Balance.

Color Calibration

Adjust spec.

1. Source : HDMI

2. Setting Mode : 1280*720@60Hz

3. Pattern : Pattern #24 (Chess Pattern)

( Chess Pattern )

4. Use Equipment : CA210 & Master MSPG925 Generator

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

Input mode Calibration Pattern

CVBS IN (Model_#1) Perform in NTSC B&W Pattern #24 Lattice

Component IN (Model_#6) Perform in 720p B&W Pattern #24 Lattice

PC Analog IN (Model_#21)

Perform in VESA XGA (1024x768)

B&W Pattern #24

Lattice

HDMI IN Perform in 720p B&W Pattern #24 Lattice



4-20

4. Troubleshooting

Method of Color Calibration (AV)

1) Apply the NTSC Lattice (N0. 3) pattern signal to the AV IN 1 port

2) Press the Source key to switch to “AV1” mode

3) Enter Service mode

4) Select the “Calibration” menu

5) Select the “AV Calibration” menu.

6) In “AV Calibration Off” status, press the “ ” key to perform Calibration.

7) When Calibration is complete, it returns to the high-level menu.

8) You can see the change of the “AV Calibration” status from Failure to Success.

Method of Color Calibration (Component)

1) Apply the 720p Lattice (N0. 6) pattern signal to the Component IN 1 port

2) Press the Source key to switch to “Component1” mode

3) Enter Service mode

4) Select the “Calibration” menu

5) Select the “Comp Calibration” menu.

6) In “Comp Calibration Off” status, press the “ ” key to perform Calibration.

7) When Calibration is complete, it returns to the high-level menu.

8) You can see the change of the “Comp Calibration” status from Failure to Success.

Method of Color Calibration (PC)

1) Apply the VESA XGA Lattice (N0. 21) pattern signal to the PC IN port

2) Press the Source key to switch to “PC” mode

3) Enter Service mode

4) Select the “Calibration” menu

5) Select the “PC Calibration” menu.

6) In “PC Calibration Off” status, press the “ ” key to perform Calibration.

7) When Calibration is complete, it returns to the high-level menu.

8) You can see the change of the “PC Calibration” status from Failure to Success.

Method of Color Calibration (HDMI)

1) Apply the 720p Lattice (N0. 6) pattern signal to the HDMI1/DVI IN port

2) Press the Source key to switch to “HDMI1” mode

3) Enter Service mode

4) Select the “Calibration” menu

5) Select the “HDMI Calibration” menu.

6) In “HDMI Calibration Off” status, press the “ ” key to perform Calibration.

7) When Calibration is complete, it returns to the high-level menu.

8) You can see the change of the “HDMI Calibration” status from Failure to Success.



4-21

4. Troubleshooting

4-4-3 White Balance - Adjustment

3. W/B

(low light) (hight light)

Sub Bright

R offset

G offset

B offset

Sub Contrast

R gain

G gain

B gain

(W/B adjustment Condition refer next page)

4-5. White Ratio (Balance) Adjustment

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

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

The optimal values for each mode are congured by default. (Refer to Table 1, 2) It varies with Panel’s size and Specication.

- 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 : Time #6 720P, Pattern #24 Chessboard Calibration Manual adjustment #92 pattern (720p)

COMP: Time #6 720P, Pattern #24 Chessboard Calibration Manual adjustment at #92 pattern (720p)

CVBS: Time #2 PAL, Pattern #24 Chessboard Calibration Manual adjustment at #92 pattern (NTSC)

PC: Time #21 1024*768, Pattern #24 Chessboard Calibration Manual adjustment at #92 pattern (NTSC)

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

- White Balance Manual Adjustment

4-22

4. Troubleshooting

CA-210

x y Y(L) T(K) + MPCD

CVBS

(NTSC)

H/L 272 287

(Sub_CT:145)

11,000 (+10)

L/L 272 287

12.2cd/m

(3.52 Ft - Sub_BR:128)

11,000 (+10)

COMP (720P)

H/L 272 287

(Sub_CT:145)

11,000 (+10)

L/L 272 287

12.1cd/m

(3.5 Ft - Sub_BR:128)

11,000 (+10)

HDMI

(720P)

H/L 272 287

(Sub_CT:145)

11,000 (+10)

L/L 272 287

12.0cd/m

(3.5 Ft - Sub_BR:128)

11,000 (+10)

- Adjustment Specication

White Balance : High light (±3), Low light (±5) Luminance : High light (±0.1Ft/L), Low light (±0.1Ft/L)

4-6. HOW TO UPGRADE

4-6-1 Software Upgrade (MSTAR ISP Tool)

MSTAR ISP TOOL

4-23

4. Troubleshooting

4-6-2 Software Upgrade (Flash Downloader)

Flash Downloader

4-24

4. Troubleshooting

4-6-3 After S/W Upgrade

How to Access Service Mode

Entering Factory Mode

Factory Data

Option Table(Service)

WB Adjust

Information

Advanced Menu If you want to enter here, press “0000”.

How to Initialize.

Click “1. Option Table(Service)” → “Factory Reset” in Factory Menu.

You can make every setting in Factory Initial Status.



5. Exploded View & Part List

5-1. LA26A450C1X / LA26A350C1X Exploded View

M0013

M0014

M0254

T0175

M0115

T0447

5. Exploded View & Part List

M0125

M0027

M0146

M0215

T0003

5-1

5. Exploded View & Part List

5-1-1. LA26A450C1X / LA26A350C1X Parts List

Location No. Code No. Description & Speciﬁ cation Q’ty S.A/S.N.A Remark

T0003 BN96-06783L ASSY COVER P-FRONT;26L450,SO,ABS+PMMA,HB 1 S.A

M0215 BN07-00528A LCD-PANEL;LTF260AP01 1 S.A

T0175 BN96-06822C ASSY SPEAKER P;8ohm,CORAL,LCD 26”,5W,4pi 1 S.A

T0447 BN96-06957A ASSY BRACKET P-PANEL;26L450,AMLCD,,SECC, 1 S.N.A

M0014 BN94-01713A ASSY PCB MAIN;LA26A450C1X* 1 S.A

M0115 BN61-02947A BRACKET-STAND LINK;JASMINE 32”,SECC,T1.6 1 S.A

T0101 BN61-03346A BRACKET-WALL;LCD TV ,SECC,T1.2 4 S.N.A

M0013 BN96-07210A ASSY COVER P-REAR;26L450,SO,HIPS,HB,BK50 1 S.A

M0027 BN96-06463F ASSY STAND P-BASE;22,26L450,ABS+PMMA,HB, 1 S.A

5-2

+ 130 hidden pages

Samsung LA26A450C1 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

1. Precautions