TCL LCD37VSH Schematic

37’’ LCD TV Color Monitor TCL LCD37VSH

Service

TABLE OF CONTENTS

Description Page Description Page

Table Of Contents.......……..............................…........1

Revision List.…........................................……......2

1. Monitor Specification..............................………........3

2. Operating Instructions…………………….……….......4

2.1 The Use Of Remote Control..……………...................4

2.2 Front Panel Control Knobs.…............……...............5

2.3 OSD Operations .………........................…............6

2.4 How To Connect ……..............……………............9

3 Input/Output Specification…………..........................13

3.1 Input Signal Connector……..........................13

3.2 RGB Input Signal Timing …….....……......................14

4. Mechanical Instructions…………………..................14

5. Repair Flow Chart ……………………….……….....19

6. White Balance Luminance Adjustment….…........25

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE

7. PCB Layout ………….……………………....….......29

7.1 Main Board.……….......................................29

7.2 Power Board……..……..............................33

7.3 Key Board…...................................36

7.4 IR Board …................….......................36

7.5 Audio Board..…….....…..........................37

8. Block Diagram.…….........................................38

8.1 Main Board.………………………………..….38

8.2 Exploded View..……..…….....................…..39

9. Schematic Diagram………………………………...40

9.1 Main Board………………..…..……………………..40

9.2 Power Board...............….....................................48

9.3 Tuner Board...……...................................................49

10. BOM List…..............................................................53

CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING

ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

37’’ LCD TV Color Monitor TCL LCD37VSH

Revision List

Version Release Date Revision Instructions TPV Model

A00 Sep-26-2006 Initial Release E376ATNCD4TLNP

37’’ LCD TV Color Monitor TCL LCD37VSH

1. Monitor Specifications

Item Spec

Screen Size 37” Color TFT-LCD Panel

Panel type T370XW01-V1

Aspect Ratio 16:9

Resolution 1366 x 768 WXGA

Active Area 37” diagonal; 819.6 (H) x 460.8 (V) mm

Pixel Pitch 0.6 (H) x 0.6 (V) mm

LCD Panel

VGA Function

TV Function

Video Input CVBS/S-VIDEO/COMPONENT/HDMI

Display Colors 16.7M (8-bit)

Contrast Ratio 700:1 (Typical)

Brightness 450 nits (Typical)

Viewing angel(CR≥20)

Response Time(Gray to Gray) 8ms (G-G)

Lamp Life > 60000 Hrs (at 4.5mA)

Color Temperature 6500K/9300K

Input support definition 640*480 /60Hz

Audio input 3.5 Mini Jack for PC Audio

TV System PAL B/G,D/K,I, NTSC M

Video systems PAL /NTSC

H = +/- 85°, V = +/- 85° with CR>10

Audio output

Audio output: L / R

10W at 3 % T.H.D Distortion

Mini Stereo Phone Jack

OSD Language Table Stand Wall Mount

Power

Environment

weight 23.0 Kg (Net)

English, Simplified Chinese

Yes

Support

Power 100-240VAC +/- 10% Wide Range, 47-60 Hz ±3Hz

Power Consumption <220 W

Operation Temperature + 0 °C ~ + 40 °C

storage Temperature

Operating Humidity 10% to 85% non-condensing

-25

°C to 60°C

37’’ LCD TV Color Monitor TCL LCD37VSH

2. Operations Instructions

2.1 The Use of Remote Control

DISPLAY

(1) Display Channel

number when use RF input.

(2) Display input source

when use other input except TV RF input.

MUTE

Temporarily interrupt the sound or restore it.

PRE-CH

To display the previously selected TV channel.

WIDE

Includes 3 modes: Press repeatedly to select 4:3 /16:9 / 16:9 non-Linear.

EFFECT

You can choice your prefer mode of User、 STEREO、CINEMA、 NEWS、MUSIC、BBE ViVA.

SWAP

Press this key can select PIP main source and sub source exchange.

SOURCE

Press this button to display selected source, press ▲ select.

∧∨ button

When in menu mode, use this button to select to the up/down; otherwise, to change TV channels.

button to

POWER

Press to turn on/off the TV.

Video/S-Video

Select your input source to VIDEO or S-VIDEO.

COMP/T-LINE

Select your input source to Component or HDMI.

VGA

Select your input source to VGA. (This type couldn’t support DVI function.)

Select your input source to TV.

0~9/100 Digit buttons

To select a TV channel.

SLEEP

With this key you can set a time period after which the TV should switch itself to standby. Press the key repeatedly to select the number of minutes. The counter runs from 15,30,45,60,90,120 minutes.

PIP

Select PIP PAP on/off .

PIP/POP Sub source

Select PIP PAP sub source.

VOL

Press ▲or▼ to adjust the volume.

Press ▲or▼ to browse through the TV channels which are not erased.

Press repeatedly to display OSD menu.

Press the button to confirm selection.

< > button

use this button to confirm selection or adjust the desired parameter; otherwise, to increase/decreas e the volume.

37’’ LCD TV Color Monitor TCL LCD37VSH

2.2 Front Panel Control Knobs

Power : Press this button to turn on the TV or allow the TV to enter standby mode. It is located on the lower right

corner of the TV. If the TV is in standby mode, the indicator at the front will32” RED/37” illuminate amber。

Menu : Press this button to display or exit the OSD menu.. 。 CH(▲

): When the OSD menu appears, press these two buttons to elect the item you want to execute; when no

OSD menu appears, use to change channels in TV mode。

VOL.(+ -): When the OSD menu appears, press these two buttons to confirm the selected item; when no OSD

menu appears, use to adjust the volume。

SOURCE : Press this button to display selected source, press ▲

button to select.

37’’ LCD TV Color Monitor TCL LCD37VSH

2.3 OSD Operations

OPERATING INSTRUCTIONS To use the menus

Press the Menu button to display or exit the Main Menu.

2. Use the Up or Down buttons to select the function to be adjusted. The function where the cursor is located is the selected one.

3. Use the Left or Right buttons to enter into the submenu, or to enable or adjust the selected function. The function where the cursor is located is the one that can be adjusted.

4. Press the Menu button to exit the menu.

The menu screen in TV/AV mode

(Note: In different modes, the functions that can be adjusted are different. A grey menu indicates that the

function cannot be adjusted.)

Press the MENU button to enter into the OSD MAIN MENU. Items adjustable include :

VIDEO SETTING,AUDIO SETTING, OPTION SETTING, CHANNEL SETTING VIDEO SETTING:

1. PICTURE: User can select PERSONAL、VIVI、STANDARD、MICD，if selected except PERSONAL item,

Contrast、brightness 、Saturation、Sharpness、NR、Backlight can’t adjust .

2.CONTRAST: Adjust black and white level ,suitable contrast can make picture more lightly . adjustment range is

from 0 to 100。

3.BRIGHTNESS : Adjust background brightness , user can collocation it with contrast adjustment range is from 0

to 100.

4.SA TURATION: Adjust color saturation , range is from 0 to 100.

5. SHARPNESS: adjustment picture sharpness , range is from 0 to 100 .

6.TINT: When the TV uses the NTSC system, you can adjust to the TINT you prefer. The adjustment range is from

-50 to +50

7.NR: :

When the signal is poor, you can turn on the noise reduction function.

8.BACKLIGHT: The adjustment range of Black Level is from 0 to 10。

You can adjust contrast、brightness、Saturation、Sharpness to your prefer level .

37’’ LCD TV Color Monitor TCL LCD37VSH

SOUND SETTING

1.VOLUME : The Volume adjustment range is from 0 to 100

You can adjust the Volume of the picture to the level you prefer.

2.EFFECT：You can choice your prefer mode of User、STEREO、NEWS、CINEMA、 MUSIC、BBE 、Default is

User mode，example use user mode.

3.120Hz、500Hz、1500Hz、5KHz；10KHZ: Choice the prefer frequency to increase or decrease

OPTIONS SETTING:

1.MENU LANGUAGE: This indicates the different languages available for the OSD menu, including Simplified

Chinese, English and traditional Chinese . The default is English.

2.MENU TIMEOUT: OSD stay timer .

3.MENU BACKGROUND: User can select Opaque or transparency with Menu background.

4.SELLP TIMER: Use this button to set a time period after which the TV will enter into stan dby mode. The time

period can be 0>15>30>45 > 60 > 90 > 120 minutes。

The timer will begin to count down from the selected number of minutes after the OSD menu disappears. Note: To check the remaining time, press the SLEEP button. To cancel the sleep timing, press the SLEEP button repeatedly until 0 appears. If you turn off the TV after you set the sleep timing, the setting will be cleared. You will need to set it again.

5. BLUE SCREEN : When there is no signal input in TV, AV, S-Video and HDTV modes, the screen will become blue.

If set to On, the screen will become blue. If set to Off, the screen will display a snowy picture when in TV signal mode and become black in other signal modes. The default is On.

6.RESET : Used to resume the TV’s default settings.

37’’ LCD TV Color Monitor TCL LCD37VSH

CHANNEL SETTING

1. COLOR SYSTEM: Auto select TV broadcast system , Auto/Ntsc/PLA.

Note: when user finish auto search , user can change system .

2. SOUND SYSTEM: Select the sound system for a TV broadcast system.DK system shall be selected for most

areas of Mainland China

3. AUTO SEARCH: Used to scan all the TV channels and save to memory.

The TV’s total number of channels is 125 (1-125). If you use the remote control to select a number out of the range

of 1-125, it will automatically skip to the channel number you previously watched.

4. MANUAL SEARCH: Used to scan the TV channels one at a time. When you scan a channel and press MENU,

5. FINE TUNE: Fine-tunes the frequency of a channel to obtain better image quality.

the last channel will be automatically saved.

。

6. CHANNEL SWAP : Swap current channel with others.

7. CHANNEL SKIP : If set to “On”, this channel will be shielded. When you press the Channel Up/Down buttons,

you cannot enter this channel. But when you press the digit buttons, you can enter it. To regain full access this channel, set this item to Off.

Menu screen in VGA/DVI mode:

The TV has a DVI-D digital interface and VGA analog interface, which can be switched using the PC button on the remote control.

Press the MENU button to enter into the OSD Main Menu. Adjustable items include: VIDEO SETTING 、SOUND

SETTING 、 OPTIONS SETTING、PC . VIDEO SETTING

1. PICTURE: can’t adjust in DVI and VGA mode .

2.CONTRAST: Adjust black and white level ,suitable contrast can make picture more lightly . adjustment range is

from 0 to 100。

3.BRIGHTNESS : Adjust background brightness , user can collocation it with contrast adjustment range is from 0

to 100.

4.SA TURATION: can’t adjust in DVI and VGA mode.

5. SHARPNESS: can’t adjust in DVI and VGA mode .

6.TINT: can’t adjust in DVI and VGA mode

37’’ LCD TV Color Monitor TCL LCD37VSH

7.NR: : can’t adjust in DVI and VGA mode

8.BACKLIGHT: can’t adjust in DVI and VGA mode

OPTIONS SETTING:

1.MENU LANGUAGE: This indicates the different languages available for the OSD menu, including Simplified

Chinese, English and traditional Chinese . The default is English.

2.MENU TIMEOUT:OSD stay timer .

3.MENU BACKGROUND: User can select Opaque or transparency with Menu background.

4.SELLP TIMER: Use this button to set a time period after which the TV will enter into standby mode. The time

period can be 0>15>30>45 > 60 > 90 > 120 minutes.

The timer will begin to count down from the selected number of minutes after the OSD menu disappears。 Note: To check the remaining time, press the SLEEP button. To cancel the sleep timing, press the SLEEP button repeatedly until 0 appears. If you turn off the TV after you set the sleep timing, the setting will be cleared. You will need to set it again.

5. BLUE SCREEN : When there is no signal input in TV, AV, S-Video and HDTV modes, the screen will become blue.

If set to On, the screen will become blue. If set to Off, the screen will display a snowy picture when in TV signal mode and become black in other signal modes. The default is On。

6.RESET : Used to resume the TV’s default settings.

1. Horizontal Position: change horizontal position on screen .

2. Vertical position : change vertical position on screen.

3. Clock: ( The function only in VGA mode )

4. Focus :Adjust A/D focus。(The function only in VGA mode)

5.Auto tune: Auto tune to a best status on screen.(The function only in VGA mode)

6. Color temp.: According your prefer to Adjust color temperate, there are warm、cool、standard.

7.User: can adjust prefer color .

8.Reset :recall to default .

2.4 How to Connect

Power Connection

Plug one end of the power cord to the “POWER” jack in the rear of the TV, and the other end to the 220V power socket. If you have not turned off the power and leave TV in standby mode, the TV will continue to consume a residual amount of power. When unused for long periods of time, it is best to turn off the power switch on the side of the TV and unplug the power cord from the socket.

37’’ LCD TV Color Monitor TCL LCD37VSH

Signal source interface presentation from rear view :

You can connect numerous items of source equipment to your TV. The figure below shows you how to connect these. Place the TV on a table with the LCD screen facing down to facilitate easy connection with the external equipment. Please take precautionary measures to avoid damaging the LCD screen.

Audio 1 Input: Connect the audio signal source (PC, DVD player, Laser Disc player, videocassette recorder or

camcorder) to the Audio Input ports (left and right). Video 1 Input: Connect the video signal source (PC, DVD player, Laser Disc player, videocassette recorder or camcorder) to the Video 1 Input interface. Note: For the connection between the PC and the TV, (see Figure 1) below.

How to connect to the PC mainframe :

VGA interface – Connect the VGA signal cable supplied with the TV to the D-sub interface at the rear of the TV as in

Figure 1.

Digital interface – Connect the DVI signal cable to the digital interface at the rear of the TV as in Figure1.

HDMI input

HDMI is the leading new standard for Digital video and audio interconnection.

How to use HDMI:

To the HDMI connector you can connect HDMI devices such as a Set Top Box or compatible DVD-R or DVD player with HDMI export, or DVI-equipped devices like a computer. So you can display high-definition pictures on this TV in the digital form.

1. Connect one HDMI to the “HDMI” port and connect the other HDMI to device with HDMI export as left figure

2. Select the HDMI button in the Remote control see right figure)

3. The HDMI connectors allow the following TV and monitor display mod:

SDTV 720x576i, 50Hz /720x480i, 60Hz EDTV 720x576p 50Hz /640x480p 60Hz HDTV 1920x1080i 50/60Hz 1280x720p 50/60Hz VGA 640x480 60Hz

37’’ LCD TV Color Monitor TCL LCD37VSH

Notes:

1. Your TV supports HDCP(High-bandwidth Digital Content Protection).This Is a system for protecting DVD content. It provides a secure digital link between a video source(DVD, PC, etc.) and your TV. Content is encrypted at the source device to prevent unauthorized copies from being made.

2. Digital devices from different manufacturers have the possibility of differing output standards which may cause difficulties for the television to properly display.

3. In case no signal is detected from your HDMI device, turn off the HDMI device and then on again.

4. To get an optimal viewing ,it is advised to turn your DVD player to one of the following TV display standards:1280x720p 50hz

How to connect the audio cable

Connect the PC audio cable supplied with the TV to the TV’s PC Audio Input as in Figure 1.

Note: If no signal is present on the VGA or DVI screen, the TV will enter into standby mode automatically after 1 minute.

3. Antenna Input: Connect the antenna or CATV cable to this 75Ω coaxial cable input .

4. Audio/Video (AV) Input (see Figure 2):

Audio 1 Input: Connect the audio signal source (PC, DVD player, Laser Disc player, videocassette recorder or camcorder) to the Audio Input ports (left and right). Video 1 Input: Connect the video signal source (PC, DVD player, Laser Disc player, videocassette recorder or camcorder) to the Video 1 Input interface. Audio 2 Input: Connect the audio signal source (PC, DVD player, Laser Disc player, videocassette recorder or camcorder) to the Audio Input ports (left and right). Video 2 Input: Connect the video signal source (PC, DVD player, Laser Disc player, videocassette recorder or camcorder) to the Video 2 Input interface.

5. S-Video Input:

Connect the S-Video cable to DVD player, Laser Disc player, videocassette recorder or camcorder (Note: For S-Video, Audio and Video 2 are shared).

Component signal Y, Pb/Cb, Pr /Cr Input or HDTV Input: Connect the component signal source of audio and video (DVD player, Laser Disc player, videocassette recorder or camcorder) to the Component Input port.

Here illustrate how to set a DVD player outputting component signal.

6 (1) How to connect:

1.User three component signal cables to connect the high definition signal Y、Pb、Pr or the component signal Y、 Cb、Cr the DVD player outputs to the high definition signal Y、Pb、Pr input of the TV.

2. Use the audio cable to connect the audio output of the DVD player to the TV’s Component Input.

6 (2) How to use

1.Press:”TV/AV”button ,display select source.

2.Select high definition signal(HDTV)input .

3.Turn on the DVD player, press the PLAY button.

37’’ LCD TV Color Monitor TCL LCD37VSH

7.Sub woofer output:

Output the mega bass signal to the mega bass sound box. The TV has the function of sub woofer signal output.

8.Video/Audio Output:

The TV can output the current TV signal or AV signal to other devices through the video output and the audio output ports. Note: When the signal source currently being playing is TV、Video 1、Video 2、S- Video ，the AV output will display picture. When the signal source currently being played is HDTV,VGA or COMP, be no picture output.

37’’ LCD TV Color Monitor TCL LCD37VSH

3. Input/Output Specification

3.1 Input Signal connector

This procedure gives you instructions for installing and using the LCD TV display. Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.

Connect the 15-pin D-SUB color display shielded signal cable to your signal system device and lock both screws on the connector to ensure firm grounding. The connector information is as follow:

11 15

15 - Pin Color Display Signal Cable

Pin No. Description

1 Red Video

2 Green Video

3 Blue Video

4 Not used

5 GROUND

6 Red Video Ground

7 Green Video Ground

8 Blue Video Ground

9 Mandatory +5V Supply for PC Bypass

10 Sync. Ground

11 Not used

12 Serial Data for DDC

13 Horizontal Sync.

14 Vertical Sync.

15 Serial Clock for DDC

Apply power to the display by turning the power switch to the "ON" position and allow about ten seconds for Panel warm-up. The Power-On indicator lights "GREEN" when the display is on.

With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.

This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal cable to the PC.

If your TV requires service, it must be returned with the power cord.

37’’ LCD TV Color Monitor TCL LCD37VSH

3.2 RGB Input Signal Timing

Vertical Horizontal Sync Polarity Presence Screen Mode

Dots × Lines

720 × 400 70.1 31.5 NEG POS YES YES YES NO

640 × 480

800 x 600

1024 x 768 60.0 48.36 NEG NEG YES YES YES NO

1360×768 60.0 47.720 NEG POS YES YES NO YES

Frequency Frequency Horizontal Vertical Horizontal Vertical Normal FULL

(Hz) (kHz) (4:3) (16:9)

59.9 31.5 NEG NEG YES YES YES NO

75.0 37.5 NEG NEG YES YES YES NO

72.0 38.77 NEG NEG YES YES YES NO

60.0 37.9 POS POS YES YES YES NO

75.0 46.87 POS POS YES YES YES NO

72.0 48.07 POS POS YES YES YES NO

37’’ LCD TV Color Monitor TCL LCD37VSH

4. Mechanical Instructions

Step Figure Description

Remove

the

back

cover

Remove the screws marked in red and

green

Remove the stand

Remove the screws marked in red

37’’ LCD TV Color Monitor TCL LCD37VSH

Remove the shield

Remove the screws marked in red

37’’ LCD TV Color Monitor TCL LCD37VSH

Remove the screws

Remove the boards

marked in red and disconnect the connector or wire.

Remove the plates

Remove the screws marked in red

37’’ LCD TV Color Monitor TCL LCD37VSH

Remove the bezel

Remove the screws marked in red

panel

37’’ LCD TV Color Monitor TCL LCD37VSH

5. Repair Flow Chart

5.1 No Power (No LED indicator)

Check power cord and board interface

Check F901, BD901, D901, D902

Check the circuit

Check IC901

Check Q901

Check T901

Check Q903, IC902 and relative circuit

Check Q906, IC905 and relative circuit

Replace F901 or BD901 or D910 or D902

Replace Q901

Replace T901

Plug in power cord and interface

Replace IC901

Replace Q903, IC902

37’’ LCD TV Color Monitor TCL LCD37VSH

5.2 Can not start (LED indicator yellow)

Check key board

Repair the key board

Check 5V_SB

Return to “5.1”

Check PWR_ON signal

Check main board power supply and U402

Check I2C communication

Check Panel inverter board

Replace panel

37’’ LCD TV Color Monitor TCL LCD37VSH

5.3 No display (LED indicator green)

Check the source

Reset source

Check LVDS cable

Reset LVDS cable

Check 12V and 5V power supply

Return to “5.1”

Check main board power supply

Check U402,U401

Replace U402,U401

Check U302,U301

Replace U302,U301

Check U407

Replace U407

Check I2C communication

Check panel

Replace panel

37’’ LCD TV Color Monitor TCL LCD37VSH

5.4 Abnormal display

Check the source

Reset source

Check signal filter circuit

Replace the filter or resistance

AV, S-video，

Component， HDMI,DVI ,PC Signal

Check input

RF signal

Check TV system setup

Repair the circuit

Check LVDS cable

Check panel

Replace LVDS cable

Replace panel

Check Tuner

Replace Tuner

37’’ LCD TV Color Monitor TCL LCD37VSH

5.5 No sound

Check the source

Reset source

Check signal filter circuit

Replace the filter circuit

Check Earphone jack

Replace the Earphone jack

SIF signal

Check TV system setup

Check Tuner

Replace Tuner

AV, S-video, HDMI,PC signal

Check U502,U503,U504,U601

Replace U502,U503,U504,U601

Check speaker

Replace speaker

37’’ LCD TV Color Monitor TCL LCD37VSH

5.6 Key Board

OSD is unstable or not working

Is Key Pad Board connecting normally?

Connect Key Pad Board

Is Button Switch normally?

Replace Button Switch

Is Key Pad Board Normally?

Replace Key Pad Board

Check Main Board

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