TCL LCD37VSH User manual

37’’ LCD TV Color Monitor TCL LCD37VSH
1
Service
Service
Service
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
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
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
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

37’’ LCD TV Color Monitor TCL LCD37VSH
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Revision List
Version Release Date Revision Instructions TPV Model
A00 Sep-26-2006 Initial Release E376ATNCD4TLNP

37’’ LCD TV Color Monitor TCL LCD37VSH
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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
Display Colors 16.7M (8-bit)
Contrast Ratio 700:1 (Typical)
Brightness 450 nits (Typical)
Viewing angel(CR≥20) H = +/- 85°, V = +/- 85°with CR>10
Response Time(Gray to Gray) 8ms (G-G)
Lamp Life > 60000 Hrs (at 4.5mA)
LCD Panel
Color Temperature 6500K/9300K
Input support definition 640*480 /60Hz
VGA Function
Audio input 3.5 Mini Jack for PC Audio
TV System PAL B/G,D/K,I, NTSC M
TV Function
Video systems PAL /NTSC
Video Input CVBS/S-VIDEO/COMPONENT/HDMI
10W at 3 % T.H.D Distortion
Audio output Audio output: L / R
Mini Stereo Phone Jack
OSD Language English, Simplified Chinese
Table Stand Yes
Wall Mount Support
Power 100-240VAC +/- 10% Wide Range, 47-60 Hz ±3Hz
Power Power Consumption <220 W
Operation Temperature + 0 °C ~ + 40 °C
storage Temperature -25°C to 60°C
Environment
Operating Humidity 10% to 85% non-condensing
weight 23.0 Kg (Net)

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2. Operations 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/T-LINE
Select your input source
to Component or HDMI.
VGA
Select your input source
to VGA.
(This type couldn’t
support DVI function.)
TV
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.
CH
Press ▲or▼to browse
through the TV channels
which are not erased.
MENU
Press repeatedly to
display OSD menu.
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 ▲button to
select.
∧∨ button
When in menu mode,
use this button to select
to the up/down;
otherwise, to change TV
channels.
OK
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.

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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.

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2.3 OSD Operations
OPERATING INSTRUCTIONS
To use the menus
1. 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.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 .

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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.

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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,
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 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.SATURATION: 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

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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.
PC
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.

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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.
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.
How to use HDMI:
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

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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 75Ωcoaxial 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).
6. 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.

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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.

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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:
1
6
11 15
5
10
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.

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3.2 RGB Input Signal Timing
Vertical Horizontal Sync Polarity Presence Screen Mode
Frequency Frequency Horizontal Vertical Horizontal Vertical Normal FULL
Dots × Lines
(Hz) (kHz) (4:3) (16:9)
720 × 400 70.1 31.5 NEG POS YES YES YES NO
59.9 31.5 NEG NEG YES YES YES NO
75.0 37.5 NEG NEG YES YES YES NO
640 × 480
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
800 x 600
72.0 48.07 POS POS YES YES YES NO
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

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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

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Remove
the
shield
Remove the
screws
marked in
red

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

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Remove
the
bezel
Remove the
screws
marked in
red
panel

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5. Repair Flow Chart
5.1 No Power (No LED indicator)
NG
Check power cord and board interface Plug in power cord and interface
OK
Check F901, BD901, D901, D902 NG Replace F901 or BD901 or D910 or D902
OK
Check IC901 NG
Replace IC901
OK
NG
OK
Check Q901 Replace Q901
OK
Check the circuit
OK
NG
Replace T901
Check T901
NG
Check Q903, IC902 and relative circuit Replace Q903, IC902
Check Q906, IC905 and relative circuit

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5.2 Can not start (LED indicator yellow)
NG Repair the key board
OK
Check 5V_SB
NG Return to “5.1”
OK
Check PWR_ON signal Check main board power supply and U402
NG
Check I
2
C communication
OK
Check key board
Check Panel inverter board NG Replace panel
OK