TCL LCD32B5H Schematic

32’’ LCD TV TCL LCD32B5H

Service

TABLE OF CONTENTS

Description Page Description Page

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

Important Safety Notice.......................................……......2

Revision List.…........................................……......3

1. General Specification.................................………........4

2. Operating Instructions………...…………….……….......5

2.1 The Use Of Remote Control…..….………….…….......5

2.2 To Use the Menu……..…………………….……….......6

2.3 How to Connect…….…………………….………......11

2.4 Front Panel Control Knobs……………….……….....11

3. Input/Output Specification…………....................…....15

4. Mechanical Instructions…………………….................16

5. White Balance Luminance Adjustment….…...............20

6. Repair Flow Chart …………………….…….…….…….25

SAFETY NOTICE

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

7. PCB Layout …..…………….………………....….......31

7.1 Main Board………..…………………….……….......31

7.2 Power Board………………...………….……….......34

7.3 DC-DC Board………………….……….……….......37

7.4 Key Board……………………………….……….......38

7.5 IR Board………………………………………….......39

8. Block Diagram.……….….........................................40

9. Schematic……………...…………..…..……………...42

9.1 Main Board…………..………….…………….…......42

9.2 Power Board………...……………….………….......53

9.3 Tuner Board…………………………….……….......55

10. Exploded View..………...……….......................…..59

11. BOM List………….…….…………………………….60

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

32’’ LCD TV TCL LCD32B5H

Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all TCL Company Equipment. The service

procedures recommended by TCL and described in this service manual are effective methods of performing service

operations. Some of these service operations require the use of tools specially designed for the purpose. The

special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in

order to minimize the risk of personal injury to service personnel. The possibility exists that improper service

methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE

NOT EXHAUSTIVE. TCL could not possibly know, evaluate and advise the service trade of all conceivable ways in

which service might be done or of the possible hazardous consequences of each way. Consequently, TCL has not

undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not

recommended by TCL must first satisfy himself thoroughly that neither his safety nor the safe operation of the

equipment will be jeopardized by the service method selected.

Hereafter throughout this manual, TCL Company will be referred to as TCL.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics might create

shock, fire, or other hazards.

Under no circumstances should the original design be modified or altered without written permission from TCL. TCL

assumes no liability, express or implied, arising out of any unauthorized modification of design.

Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER:

DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.

CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may

result in hazardous radiation exposure.

CAUTION -The use of optical instruments with this product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S

REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF

THIS SERVICE MANUAL.

Take care during handling the LCD module with backlight unit

-Must mount the module using mounting holes arranged in four corners.

-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to

the panel.

-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

-Make certain that treatment person’s body is grounded through wristband.

-Do not leave the module in high temperature and in areas of high humidity for a long time.

-Avoid contact with water as it may a short circuit within the module.

-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

32’’ LCD TV TCL LCD32B5H

Revision List

Version Release Date Revision Instructions TPV Model

A00 Dec.-8-2006 Initial Release E325MTNCC2TLNP

32’’ LCD TV TCL LCD32B5H

1. General Specifications

Items Specification

Screen Size 32”(81cm)TFT-LCD Panel

Panel type TV 32" B1 C4 CMO

Aspect Ratio 16:9

Resolution (Native)

Active Area 819.6 (H) x 460.8 (V) mm

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

1360 x 768 WXGA

LCD Panel

VGA Function

TV Function

Video Input CVBS/S-VIDEO/COMPONENT/HDMI

Audio Output Audio Output: L / R

OSD language English, Simplified Chinese

Wall Mount VESA 100mm X 100mm

Contrast Ratio 700:1 (Typical)

Brightness 420 nits (Typical)

Response Time 6.5ms (G-G)

Viewing Angle

Display colors 16.7 million

Rated Life (Backlight) > 60000 Hrs (at 4.5mA)

Preset Color 9300K

Input support definition

Audio input Mini jack for stereo headphones (3.5ø)

TV Standard

Color systems PAL / NTSC

H = +/- 85°, V = +/- 85° with CR>10

Only support:640*480 60Hz If input signal isn’t 640*480 60Hz,Picture display abnormally, At same time TV set will display” out of range”，So please return to 640*480 60Hz

PAL B/G, I, D/K, I、NTSC/M

Speaker (built-in): Two 10W speakers

Headphone Mini-jack for stereo (3.5ø)

Power

Environment

Accessories

Power Input Voltage Range 100-240VAC +/- 10% Wide Range

Input Frequency Range 47-60 Hz ±3Hz

Operating Temperature

Operating Humidity 10% to 85% non-condensing

Operating Altitude 0 meter to +3000 meters above sea level

Storage Temperature - 25 °C ~ + 60 °C

Storage Humidity

Storage Altitude

Remote Controller, Batteries (x2), AC Power Cord, D-sub Signal Cable, Audio Cable, User’s Manual, etc

0°C to 40°C

5% to 85% non-condensing

0 meter to 12,000 meters above sea level

32’’ LCD TV TCL LCD32B5H

2. Operating Instructions

2.1. The Use of Remote Control

POWER

Press to turn on/off the TV.

Video/S-Video

Select your input source to VIDEO or S-VIDEO.

COMP/HDMI

Select your input source to COMPONENT or HDMI(T-LINE).

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 OFF 15,30,45,60,90,120 minutes. PIP (This type couldn’t support PIP function). 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.

NICAM

When NICAM menu activated,press the key repeatdely to select MONO/DUAL1/DUAL 2/DUAL 1+2/STEREO.

Press the button to confirm selection.

< > button

Use this button to confirm selection or adjust the desired parameter; otherwise, to increase/decrease the volume.

DISPLAY

(1) Display Channel

(2) Display input source

MUTE

Temporarily interrupt the sound or restore it.

PRE-CH

To display the previously selected TV channel.

WIDE

Includes 6 modes: Press repeatedly to select 4:3 /14:9 / 16:9 ZOOM 16:9 ZOOM UP/CINERAMA/ALL SCREEN).

EFFECT You can choice your prefer mode of NEWS/MOVIE/MUSIC/ BBE VIVA/CUSTOM/ STEREO.

SWAP

(This type couldn’t support this function.)

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.

number when use RF input.

when use other input except TV RF input.

button to

32’’ LCD TV TCL LCD32B5H

2.2 To Use the Menus

1. Press the MENU button repeatedly to display each menu.

2. Use the cursor up/down to select a menu item or adjust the setting of Menu item.

3. Use the cursor left/right to enter a submenu or enable/disable the function.

4. Press the MENU button to exit the menu.

MAIN 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,SOUND

SETTING, OPTIONS 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.

32’’ LCD TV TCL LCD32B5H

4.SATURATION: 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 .

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 CUSTOM、STEREO、NEWS、MOVIE、MUSIC、BBE VIVA 、

Default is CUSTOM 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.

32’’ LCD TV TCL LCD32B5H

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 stand by mode. The time

period can be OFF >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 “OFF” 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.

CHANNEL SETTING

1. COLOR SYSTEM: Auto select TV broadcast style.（Auto/NTSC/PAL）

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,

the last channel will be automatically saved.

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

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 digital buttons, you can enter it. To regain full access this channel,

set this item to Off.

Menu screen in VGA mode:

32’’ LCD TV TCL LCD32B5H

The TV has 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 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.SATURATION: Can’t adjust in VGA mode.

5. SHARPNESS: Can’t adjust in VGA mode .

6.TINT: Can’t adjust in VGA mode.

7.NR: :

Can’t adjust in VGA mode.

8.BACKLIGHT: Can’t adjust in VGA mode.

32’’ LCD TV TCL LCD32B5H

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: Can’t adjust in VGA mode.

5. BLUE SCREEN : Can’t adjust in VGA mode.

6.RESET : Used to resume the default settings.

1. Horizontal Position: Change horizontal position on screen .

2. Vertical position : Change vertical position on screen.

3. Clock: Change horizontal position.

4. Focus :Adjust A/D focus.

5.Auto tune: Auto tune to a best status on screen.

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

7.User: can adjust prefer color.

8.Reset :recall to default .

32’’ LCD TV TCL LCD32B5H

2.3 Front Panel Control Knob

: 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 will illuminate amber.

Menu : Press this button to display or exit the OSD menu.. .

PR(▲

) : 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.

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.

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.

32’’ LCD TV TCL LCD32B5H

VGA signal Input: receive the signals of pc host by the VGA signal cable connect to this TV input.

PC Audio Input: receive the audio signals of PC by the interface Input.

(Figure 1)

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.

HDMI input

HDMI is the leading new standard for Digital video and audio interconnection. 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. So you can display high-definition

pictures on this TV in the digital form.

How to use HDMI:

1.Connect the HDMI cable to the “HDMI” port of this TV, and the other port to the

device’s interface with HDMI export. as left figure.

2.Slect 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

32’’ LCD TV TCL LCD32B5H

HDTV 1920x1080i 50/60Hz

1280x720p 50/60Hz

VGA 640x480 60Hz

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 60HZ.

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 screen, the TV will enter into standby mode automatically after 1 minute.

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

NOTE: Insert the aerial plug firmly into the aerial socket ANT IN 75Ω at the back of the TV. When the no signal input,

the unit is now in the standby mode.

Audio/Video (AV) Input:

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.

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.

32’’ LCD TV TCL LCD32B5H

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

(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.

(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.

Sub woofer output:

Output the mega bass signal to the mega bass sound box.

The TV has the function of sub woofer signal output.

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. Remote

Control battery assembly:

1. Remove the battery cover, insert the 2 batteries included (Size AA, 1.5V) according to the indication of +/- polarity

on the remote control.

2. Aim the remote control handset directly at the remote control sensor lens on the front of the TV. If there is

something between the TV and the remote control, the remote control will not be effective.

32’’ LCD TV TCL LCD32B5H

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 Pin No. Description

1 Red Video 9 Mandatory +5V Supply for PC Bypass

2 Green Video 10 Sync Ground

3 Blue Video 11 Not Used

4 Not Used 12 Serial Data for DDC

5 Ground 13 H-Sync.

6 Red Video Ground 14 V-Sync.

7 Green Video Ground 15 Serial Clock for DDC

8 Blue Video Ground

3.2 Compatible Mode Table

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

1360 x 768

Frequency Frequency Horizont

(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

60.0 37.9 POS POS YES YES YES NO

75.0 46.87 POS POS YES YES YES NO

60.0 48.36 NEG NEG YES YES YES NO

60.0 47.36 POS NEG YES YES NO YES

ertical Horizont

ertica Normal FULL

32’’ LCD TV TCL LCD32B5H

4. Mechanical Instructions

Step Figure Description

Preparation

Remove

the stand

Remove the screws marked in red

Remove the back cover

Remove the screws marked in red

32’’ LCD TV TCL LCD32B5H

Remove the shield

Remove the screws marked in red

Remove the boards

Remove the screws marked in red and disconnect the connector or wire.

32’’ LCD TV TCL LCD32B5H

Remove the plates

Remove the screws marked in red

panel

32’’ LCD TV TCL LCD32B5H

32” LCD TV TCL LCD32B5H

5. White Balance, Luminance Adjustment

Instrument List:

Chroma 2225、VG848、Chroma 7120

Adjustment Process:

① Instrument Orientation

Connect LCD-TV、Chroma 2225 and VG848, and set Timing137、Pattern1 on Chroma2225. Chroma7120’s lens

must aim at the center of Pattern1 showed on the LCD-TV’s screen. The distance of Chroma7120’s lens and the

center of screen is 20cm±1cm.

② ENTER FACTORY

After orientation OK, set Pattern104(black picture) on Chroma225.Press 1-9-9-9 on remote to enter the menu

on top left of the screen(refer to fig.1,this menu will show slowly), then from UP key( ) option to enter the menu △

(refer to fig.2).

Fig.1

32” LCD TV TCL LCD32B5H

Fig.2

Fig.3

PC Mode White Balance Adjustment③

Begin to adjust the W/B (White Balance) you should select the Color Temp(Warm and Cold) and enter the son

menu from father menu “Scaler” refer to Fig.2 and Fig.3.

Set channel color temperature value and brightness on Chroma7120.Set 313 329 450 (warm Temp) on CH3

and 313 297 450 (cold Temp) on CH4.Press MODE key on Chroma7120 to switch xyY mode.

Use black sleeve on Chroma7120’s lens to ensure no external ray. Set Pattern104 on Chroma2225.Adjust

SCALAR RB、GB、BB value to make sure the brightness is the lowest, then set Pattern105 on Chroma2225 and

32” LCD TV TCL LCD32B5H

adjust RG、GG、BG value to make the value displaying on Chroma7120 is about 100.Press “Save” to save. Switch

to CH4, select cold Temp and then adjust it according to above method. Press “Save” to save.

AV MODE W/B ADJUSTMENT④

Begin to adjust AV/COMPONENT YPbPr(480I/576I)/COMPONENT T-scaler(480P/720P/1080I) /HDMI W/B,

their Color Temp modes refer to Fig.4/5/6/7

Fig.4

Fig.5

32” LCD TV TCL LCD32B5H

Fig.6

Fig.7

1.OFFSET(26%) W/B ADJUSTMENT(This is only for AV/TV)：Change the input signal to 26% white level

performance .Set the CHROMA7120 to 288 301 30 and MODE_RGB ,then adjust the TV’s RB、GB、BB to make

CHROMA7120 display to 100.

2.W/B ADJUSTMENT (100%): Change the input signal to 100% white level performance. Set the

CHROMA7120 to 283 297 450 and MODE_RGB , then adjust the TV’s RG、GG、BG to make CHROMA7120 display

to 100.

3.Save the adjustment. Then change the input signal to 26% white level performance. Set the CHROMA7120 to

MODE_RGB and CH3, check whether the color temperature was in SPEC (color spec is x±15;y±15;Y±15). In this

time, most of the TV is in SPEC, while the others should be adjusted twice or more to make its color temperature in

32” LCD TV TCL LCD32B5H

SPEC.

4.CHECK CUT OFF: Change the input signal to 0% white level performance. Firstly, press the “brightness” from

50% to 0% and make sure the Y is not changed. Secondly, change the input signal to 32 GRAYS performance and

make sure the grays is not connected at any position.( as the 5% level is between the first gray and the second gray.

5%=（1/32）*1.6。)

1.The white color temperature in PC Mode should be app. 6500K (CIE1931: x=0.313, y=0.329),

9300K(CIE1931 : x= 0.283 , y= 0.297 ).

2.The white color temperature in AV/TV Mode should be app. 9300K(CIE1931 : x= 0.283 , y= 0.297 ), In this

Mode,we should check the black balance,which level is 26% of the white level(1.0Vpp).

Those three channels should be factory preset and not be possible to be modified.

The measurement position is the center of the display(5) at brightness set to center and

Contrast set to max. . The tolerance of the color coordinates should be less than ± 0.020

32” LCD TV TCL LCD32B5H

6. Repair Flow Chart

6.1 No Power (No LED indicator)

Check power cord and board interface

Plug in power cord and interface

Check F901, BD901, D901, D902

Replace F901 or BD901 or D902

Check the load

Check IC981, D928 (12V)

Replace IC981or D928

Check IC901

Replace IC901

Check Q901

Replace Q901

Check IC941

Replace IC941

Check Q941

Replace Q941

Check Q946 Q947

Replace Q946 Q947

Check IC927

Replace IC927

32” LCD TV TCL LCD32B5H

6.2 Can not start (LED indicator yellow)

Check key board

Check 5V_SB

Check PWR_ON signal

Check I2C communication

Check Panel inverter board

Repair the key board

Return to “6.1”

Check main board power supply and U402

Replace panel

32” LCD TV TCL LCD32B5H

6.3 No display (LED indicator green)

Check the source

Check LVDS cable

Check 12V and 5V power supply

Check main board power supply

Check U402,U401

Reset source

Reset LVDS cable

Replace U402,U401

Return to “6.1”

Check U302,U301

Check U407

Check I2C communication

Check panel

Replace U302,U301

Replace U407

Replace panel

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