TCL L19E75A User manual

19″LCD TV TCL L19E75A
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Service
Service
Service
Horizontal Frequency
31.5KHz-75KHz
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.
6. White Balance Luminance Adjustment….…….......27
7. PCB Layout ………….………………….…....….......29
7.1 Main Board.………..........................................29
7.2 Power Board………..…..…..............................31
7.3 IR Board….………..................….......................34
7.4 Key Board……….....….......................... ...... ...... ..35
8. Block Diagram.……….….........................................36
9. Schematic Diagram……………...…………………...37
9.1 Main Board……………..…..………………………..37
9.2 Power Board.............….....................................45
10.Exploded View………………….....................…..47
11.BOM List…............................................................49
Table Of Contents.......……..............................…........1
Revision List.…........................................……......2
1. Monitor Specification..................................………........4
2. Operating Instructions……………...……….……….......5
2.1 The Use Of Remote Control..……………...................5
2.2 Front Panel Control Knobs.…...............……...............6
2.3 OSD Operations…...………........................…............7
2.4 How To Connect.……….….……......………..............12
3 Input/Output Specification…………..........................13
3.1 Input Signal Connector……......................................13
3.2 RGB Input Signal Timing …….....……......................15
4. Mechanical Instructions………………...…..................16
5. Repair Flow Chart ……………………….……….....21
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
R FOR TH
UNIT WHEN S

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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, WHICHARE 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.)

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Revision List
Version
Release Date
Revision Instructions
TPV Model
A00
April-15-2007
Initial Release
E197M1NCBWTLN

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1. Monitor Specification
Items
Specification
LCD Panel
Panel Type
M190A1-L02 C1 CMO
Aspect Ratio
16:9
Pixel Number
1440x900
Active Display Area H x V
410.4mmx256.5mm
Pixel Pitch
0.285 x 0.285(mm)
Response Time
5ms
View Angle (CR≥20)
150° (Horizontal)/ 130° (Vertical)
Display colors
16.2 million
Color Temperature
Cool / Warm/Standard
Video Inputs
AV、S-VIDEO, Component, Scart(RGB + Composite),HDMI
Audio Output
Audio Output: L / R
Speaker: Two 10 watt speakers
Stereo headphone jack (3.5ø)
PC Function
Input frequency
1440*900 / 60Hz is the recommended
mode. When message ”The input
frequency exceeds the maximum”
appears, please return to
above-mentioned supported modes
ASAP.
Audio input
Stereo headphone jack (3.5ø)
TV Function
TV Standard
PAL B/G、D/K、I
Sound systems
NICAM
Color systems
PAL, NTSC
OSD language
Simplified Chinese / English /
Table Stand
Included
Wall Mount
Optional
Power
Power Supply
AC100V~240V, 50/60Hz
Power Consumption
<55W
Panel Tilt
Forward/Backward/Rotate
Lead angle：3±10
Tilt：15±10
Dimension
Unit
dimensions
W x H x D (with stand)
478 x 405 x 215 (mm)
W x H x D (without stand )
478 x 370 x 88 (mm)
Carton
dimensions
W x H x D
558 x 472 x 186 (mm)
Environment
Operating Tem.
+ 5 °C ~ + 35 °C
Storage Tem.
- 25 °C ~ + 60 °C
Operating humidity
10% ~ 85%
Storage humidity
5% ~ 85%

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2. Operations Instructions
2.1 The Use Of Remote Control
POWER
Press to turn on/off the TV.
The TV will not completely
shutdown, it stays in an
energy saving standby mode.
TEMP
Press repeatedly to switch the
color temperature between
normal, cool and warm.
SLEEP
Press repeatedly to set sleep
timer for: 0,15, 30, 45, 60, 90
or 120 minutes
0~9/100
To select a TV channel.
SOURCE
Press to display available
signal sources. Select
sources with “P- or P+”
buttoms.
VOL
Press V+ or V- to adjust the
volume.
PR
Press P+ or P- to browse
through the TV channels
which are not erased.
OK
Press the button to confirm
selection.
MENU
Press repeatedly to display
OSD menu
MUTE
Temporarily interrupt the
sound or restore it.
DNR
Press this button
repeatedly to switch the
DNR between off, weak，
Middle, and strong.
DISPLAY
Press to display current
output signal information,
Sleep mode timer and
audio mode
PRE-CH
To display previous TV
channel.
ASPECT
2 modes available: Press
to toggle between
Fullscreen or Novmal
modes.
EFFECT
To select Personal,
Music, Standard or
News.
NICAM
Press to select TV audio
status: MONO/DUAL
1/DUAL 2/DUAL
1+2/STEREO.

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2.2 Front Panel Control Knobs
Volume: To adjust the volume. Under Menu status these 2 buttons can be used to confirm selected options.
Channel: To switch channels. Under Menu status these 2 buttons can be used to access selected options.
Menu: Enters or exits the OSD Menu.
Source Signal: Selects different input source signals.
Power: Switch to enter/exit Standby mode.

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Main Menu
2.3 OSD Operations
To use the menus
1. Press the Menu button to display or exit the Main Menu.
2. Use the V- or V+ to select the function to be adjusted.
3. Use the P- or P+ to enter into the submenu, or to enable or adjust the selected function.
Source Menu
Press the SOURCE button to enter the Source Menu: PC, HDMI, TV, AV, S-Video, YPBPR.
Press the menu to enter into the OSD menu.
Adjustable items for TV mode includes: Picture, Sound, Function, System and TV Channel .
Adjustable items for PC mode includes: PC, Sound, Geometry, System and Function.
Adjustable items for HDMI mode includes: Picture, Sound, and System.
Adjustable items for Video mode includes: S-Video mode or YPBYR Video input includes: Picture, Sound, Function.

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Picture（PC: computer setting）
1. Adjustable Brightness and Contrast range is from 0~100. Screen brightness can be set by adjusting the
Brightness or Contrast.
2. Hue: Adjustable range is from 0~100. Adjusting this option will change the screen color. (when the color
system is PAL) （PC: NO function）
3. Saturation: Adjustable range from 0~100. Adjust this option to change the color intensity on the screen. （PC:
NO function）
4. Sharpness: Adjustable range from 0~100. Input the value to set the sharpness of the screen. （PC: NO
function）
5. Color tone: This option provides 3 choices: Normal, Warm and Cool.
6. Scale: 5 modes available for screen aspect ratio selection: Standard, Panorama, Full screen, Zoom 1 and
Zoom 2. (Select between “Standard” and “Center” under HDMI mode). （PC: NO function）
7. Picture mode: 4 options: Personal, Soft, Bright, and Dynamic, to select the overall effect of the screen. （PC:
NO function）
8. Memory recall: To reset the video settings back to the factory default settings.
Sound settings (Applicable for all modes)
1. Bass, Treble and Balance: Adjustable ranges are from 0~100. Right channel sound fades out as adjusting from
50 to 0 and the left channel fades out as adjusting from 50 to 100. (Available when the Audio setting is under
Custom mode).
2. MTS: Only TV mode has following 6 options for selection: Mono, Mono 1, SAP A, SAP B, SAP AB and
Stereophonic. Mono is the only option for the other modes.
3. Sound mode: Standard, News, Music and Personal. Bass, Treble and Balance options are available when
Personal mode is selected.
4. 5 band Equalizer: 120, 500, 1K5, 5K, 10K are available for your selection.
(Sub list shows the bands)

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5. Avc: Select On/Off to enable. Prevents the rapid change of volume while switching modes or channels.
6. Memory recall: To reset the Sound settings back to the factory default settings.
Geometry settings（under PC mode）
1. V Phase，H Position：Adjustable ranges are from 0～100. To move the entire screen up/down or left/right.
2. Clock or Phase：Adjustable range is from 0～100. Adjust only when the entire screen shakes or glitches appear.
Do not adjust when everything is normal.
3. Auto size：Adjust the above values automatically.
Advance Settings (Under TV, AV, S-video or YPbPr modes)
1．NR: Off, Weak, Middle or Strong. Choose to clear serious noise problems from the screen. Please refer to the
actual screen when making your selection. It is recommended not to change settings when noise problems are
minor.
2．Reset: To reset the Function settings back to the factory default setting.

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System Settings
1．Sleep Timer: You can set a timer to enter standby status for the unit. Timer options are 0, 15, 30, 45, 60, 90 and
120 minutes. The timer starts counting as soon as the menu disappears from the screen. Set the Sleep Timer to
0 to disable the Sleep Timer function. The timer pauses automatically when entering PC mode, resumes when
returning to other modes.
2．OSD Language: Select the OSD language among Simplified Chinese, Traditional Chinese and English.
3．OSD H/V Position: Adjustable range from 0~100. To adjust the position of the menu on the screen.
4．OSD Duration: Adjustable range from 5~60 sec. To adjust the duration of the Menu on the screen.
5．OSD Halftone: Adjustable range from 0~100. To adjust the menu transparency. The screen will not be seen
through the menu when the set to 0.
6．Information: To display the information of current signal.
7．Blue Screen: If the blue screen option is set to "On", the TV will display a default blue screen when there is no
input TV signal .The system default is “On” to communicate to the user that there is no input signal .
8．Memory recall: To reset the System settings back to the factory default settings.
TV-Channel (Available only under TV mode)
1. Color system: To display the color standard of the current TV signal (display as Auto after choosing Auto Save).
2. Sound system: To display the sound standard of the current TV signal (display as Auto after choosing Auto
Save).
3. Auto Scan: To scan the channel save automatically.

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4. Manual Search: For the user to scan the channels and save programs manually.
5. Set frequency: Display the frequency of the current channel. The frequency can be input manually. (Range is
from 47.0MHZ to 903MHZ).
6. Fine tuning: Use left/right buttons to fine tune the frequency.

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2.4 How To Connect
Remove the backboard of the TV as shown in the image.
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.
1:AC power input
2:HDMI input
3:VGA signal input：Input signal for PC video with a VGA signal cable
4:PC audio input：Input for PC audio signal
5: Headset output
6: Component audio signal input (right channel)
7, 8, 9: Pr/Cr, Pb/Cb, Y component signal input
10: TV antenna input
11: Right channel audio input（Video in/S-Video in）
12: Left channel audio input（Video in/S-Video in）
13: Video AV-in
14: Component audio signal input (Left channel)
15: S-Video in：S-Video cable input for DVD, LD player, VCR or Video cameras.

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Note: For the connection between the PC and the TV, (see below)
Note：When there is no input VGA signal, the unit will automatically switch to standby mode after 1 minute.
Antenna input: Antenna or CATV cable input. This portal accepts a 75Ωcoaxial cable for the input signal. Please refer
to the following image:
Note：When there is no TV signal input, the unit will automatically switch to standby mode after 10 minutes.
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. It is recommended that you turn off the power switch on the side and unplug the power
cords from the outlet when the TV will not be used for a long time.

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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
TXD
5
GROUND
6
Red Video Ground
7
Green Video Ground
8
Blue Video Ground
9
No Pin!
10
Sync. Ground
11
RXD
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.

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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.
3.2 RGB Input Signal Timing
Dots × Lines
Vertical
Frequency
Horizontal
Frequency
Sync Polarity
Presence
Screen Mode
Horizontal
Vertical
Horizontal
Vertical
FULL
(Hz)
(KHz)
(15:9)
720×400
70.1
31.5
NEG
POS
YES
YES
YES
640×480
59.9
31.5
NEG
NEG
YES
YES
YES
72.8
37.9
NEG
NEG
YES
YES
YES
75.0
37.5
NEG
NEG
YES
YES
YES
800 ×600
60.3
37.9
POS
POS
YES
YES
YES
72.2
48.1
POS
POS
YES
YES
YES
75.0
46.9
POS
POS
YES
YES
YES
1024 x 768
60
48.3
NEG
NEG
YES
YES
YES
70
56.5
POS
POS
YES
YES
YES
75
60.0
POS
POS
YES
YES
YES
1440x900
60
55.5
POS
POS
YES
YES
YES
70
59.9
POS
POS
YES
YES
YES
75
75.0
POS
POS
YES
YES
YES

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4. Mechanical Instructions
Step
Figure
Description
Preparation
Lay the
LCD-TV on a
flat, soft and
clean surface.
Remove
the base
and stand
Remove the
hinge cover
and the
screws on the
stand to
remove the
stand and
base.
Remove
the back
cover
Remove the
screws mark
in red to
remove the
back cover.

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Remove
The hinge
plate
Remove the
six screws to
remove the
hinge plate
Remove
the shield
1、Remove the
eleven screws

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Remove
Main Board
and Power
Board
1.Remove the
five screws
marked in red
to remove the
power board.
2. Remove the
nine screws
marked in red
to remove the
main board
3.Disconnect
the connector
marked in blue
and remove
power board
and main
board.

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Remove
The Main
Frame.
Remove the
four screws to
remove the
main frame.

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Panel