TCL L22E75BK User manual

22 ″ LCD TV TCL L22E75BK
Service
Service
Service
Horizontal Frequency
31.5KHz 80KHz
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
1
6. White alance Luminance Adjustment … . …… ... .... 25
7. PC Layout ………… . ………………… . … .. ..…....... 27
7 . 1 Main oard .………........... ... ............................ 27
7 . 2 Power oard ……… .. … .. … . ............................. 29
7.3 IR oard … . ………..... .. ...........… . ...................... 31
7.4 Key oard ……… . ....….......................... ...... ...... .. 32
8. lock Diagram. ……… . … .. ..................... . ................. 33
9. Schematic Diagram …………… ... ………………… . .. 34
9.1 Main oard …………… .. … .. ……………………… . . 34
9.2 Power oard ..... ........ … .. .. .. ............................... 42
10.Exploded View ………………….....................….. 44
11. OM List …........ .......................... .......................... 45
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 ………… . ......................... 14
3.1 Input Signal Connector …… .. ... ............ ..................... 14
3.2 RG Input Signal Timing …….....…… . ..................... 15
4. Mechanical Instructions ……………… ... ….................. 16
5. Repair Flow Chart ……………………… . ……… . .... 20

22 ″ LCD TV TCL L22E75BK
AND E AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO E USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
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CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

22 ″ LCD TV TCL L22E75BK
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 EAM.
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 RELIA ILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUM ERS 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.
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22 ″ LCD TV TCL L22E75BK
-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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22 ″ LCD TV TCL L22E75BK
Revision List
Version Release Date Revision Instructions TPV Model
A00 Nov-08-2007 Initial Release E227A1NM WTLNN
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22 ″ LCD TV TCL L22E75BK
1. Monitor Specification
Feature 22" screen
WXGA ( 1680x1050 ) Resolution
Contrast ratio :1000:1
Wide Viewing Angle (170°H / 160°V )
Items Specification
Screen Size 22” TFT -LCD Panel
Aspect Ratio 16: 9
Resolution 1680X1050
Display area 473.76 (H) × 296.1(V)
Pixel Pitch 0.282 x 0.282
Display colors 16.7 M
Viewing Angle 170° (Horizontal)/ 160° (Vertical)
Response Time Fast 5ms
Lamp life 50000 hours
Color Temperature Cool / Warm / Normal
PC
Function
Input frequency Recommended：1680X1050/60Hz;1440x900/60Hz ;1280X1024/60Hz
1024x768/60Hz /75Hz; 800x600/60Hz /75Hz
Audio input Stereo headphone jack (3.5ø)mm
TV
Function
TV Standard PAL /G、D/K、I ；NTSC M
Sound systems NICAM
Color systems PAL, NTSC
Extended
input
Video RCA x 1 Audio L / R x 1
S-VIDEO S-Video x 1
Component input
Y Pb/Cb Pr/Cr
Y Pb/Cb Pr/Cr x
1Audio L / R x 1
Component input support 480i, 576i, 480p, 576p, 720p, 1080i
HDMI input HDMI x 1
HDMI input support 576i, 480p, 480i,576p, 720p, 1080i,
Audio Output Audio Output: L / R Speaker(5 watt):Two Speaker
Stereo headphone jack (3.5ø)mm
OSD language Simplified Chinese / English / Traditional Chinese
Table Stand Included
Wall Mount VESA 100 x 100 mm
Power Power Supply 100-240V~ 50/60Hz
Power Consumption < 75W
Tilt forward/ ackward/Rotate Lead angle：3±1° : Tilt：15±1°
Environment
operating temp + 5 °C ~ + 35 °C
storage temp - 25 °C ~ + 60 °C
operating humidity 10% ~ 85%
Unit dimensions W x H x D(with stand) 536x 445x 215 (mm)
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22 ″ LCD TV TCL L22E75BK
Weight (net) Kg (w/o Accessories) 6.3 Kg
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22 ″ LCD TV TCL L22E75BK
2. Operations Instructions
2.1 The Use Of Remote Control
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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 this KEY to validate your
selected and operate
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.
PICTURE
To select Standard, Dynamic, Soft
and Personal.

22 ″ LCD TV TCL L22E75BK
2.2 Front Panel Control Knobs
VOL▲▼①②: To adjust the volume. Under Menu status these 2 buttons can be used to confirm selected options.
CH ▲▼③④: To switch channels. Under Menu status these 2 buttons can be used to access selected options.
MENU ⑤: Enter or exit the OSD Menu.
INPUT ⑥:Enter the source menu to select different input source signals.
POWER ⑦: Switch to enter/exit Standby mode.
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22 ″ LCD TV TCL L22E75BK
2.3 OSD Operations
To use the menus
1. Press the Menu button to display or exit the Main Menu.
2. Use the V-, V+ to select the function to be adjusted.
3. Use the P- ,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, YPb Pr.
Main Menu
I. Press the menu to enter into the OSD menu.
Adjustable items for TV mode includes:Picture,Sound, advance,System and TV Channel .
Adjustable items for PC mode includes: PC, Sound, Geometry, System.
Adjustable items for HDMI mode includes: PC, Sound, and System.
Adjustable items for Video mode(S-Video mode or YPb/Cb Pr/Cr Video) input includes: Picture, Sound, advance
system.
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22 ″ LCD TV TCL L22E75BK
Ⅱ.Picture
1. Adjustable rightness and Contrast range is from 0~100. Screen brightness can be set by adjusting the
rightness or Contrast.
2. Hue: Adjustable range is from 0~100. Adjusting this option will change the screen color. (when the color system
is NTSC)
3. Saturation: Adjustable range from 0~100. Adjust this option to change the color intensity on the screen.
4. Sharpness: Adjustable range from 0~100. Input the value to set the sharpness of the screen.
5. Color tone: This option provides 3 choices: Normal, Warm and Cool.
6. Scale: 2 modes available for screen aspect ratio selection: Standard, Full screen, (for TV mode).
7. Picture mode: 4 options: Personal, Standard, Dynamic, Soft, to select the overall effect of the screen.
8. MEMORY REACLL: To reset the video settings back to the factory default settings.
rightness,Contrast,Tint,saturation and Sharpness in the picture of setting up a "personal settings"adjustable.
Ⅲ. Sound settings (Applicable for all modes)
1. ass, Treble and alance: 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 user
mode).
2. MTS: Only TV mode has following 5 options for selection: Mono, Mono 1,
DUAL A, DUAL , and stereophone. Mono is the only option for the other modes.
3. Sound mode: Standard, News, Music, Personal and ass, Treble and alance options are available when
Personal mode is selected.
4. Equalizer: 120Hz, 500Hz, 1.5K Hz, 5K Hz, 10K Hz are available for your selection.
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22 ″ LCD TV TCL L22E75BK
5. AVC: Select On/Off to prevent the rapid change
of volume while switching modes or channels.
6. MEMORY REACLL: To reset the Sound settings back to the
factory default settings.
Ⅳ. Geometry settings（under PC mode）
1. H-Position,V-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 Adjust：Adjust the above values automatically.
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22 ″ LCD TV TCL L22E75BK
Ⅴ. Advanced Settings (Under TV, AV, S video or YPbPr modes)
1．NR: Weak, Middle, Strong, Off .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．MEMORY REACLL: To reset the Function settings back to the factory
default setting.
Ⅵ. 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, English and Traditional Chinese.
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 and version.(note: the version is being continuously improved,
changes may be made to this manual without notice.).
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22 ″ LCD TV TCL L22E75BK
7．lue 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 REACLL: To reset the System settings back to the factory default settings.
Ⅶ. 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). (In
Australia, the PAL Color system is used)
2. Sound system: To display the sound standard of the current TV signal (display as Auto after choosing Auto Save). (In
Australia, the G sound system is used)
3. Auto Scan: To scan for the channels automatically.
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 903.81MHZ).
6. Fine tuning: Use left/right buttons to fine tune the frequency.
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22 ″ LCD TV TCL L22E75BK
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:POWER：DC-IN
2:HDMI: Input signal for HDMI.
3:VGA ：Input signal for PC video with a VGA signal cable
4:AUDIO：Input for PC audio signal
5: EARPHONE
6: S-Video ： S-Video cable input for DVD, LD player, VCR or Video
7: Component in: audio signal input（Right channel）
8, 9,10: Pr/Cr, Pb/Cb, Y component signal input
11: ANT：TV antenna input
12: Right channel audio input（Video Input /S-Video Input）
13: Left channel audio input（Video Input /S-Video Input）
14: Video in: AV- Input
15: Component in: audio signal input (Left channel)
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22 ″ LCD TV TCL L22E75BK
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 30 minute.
Antenna input: Antenna or CATV cable input. This portal accepts a 75Ω coaxial 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 15 minutes.
Power Connection
Plug the AC-power cord into the External Adapter. Then plug the DC-jack power cable into “POWER”
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 unplug the power cords from the outlet when the TV will not be used for a long time.
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22 ″ LCD TV TCL L22E75BK
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-SU 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 lue Video
4 TXD
5 GROUND
6 Red Video Ground
7 Green Video Ground
8 lue 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
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22 ″ LCD TV TCL L22E75BK
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. e 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
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22 ″ LCD TV TCL L22E75BK
4. Mechanical Instructions
Step Figure Description
Preparatio
n
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.
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22 ″ LCD TV TCL L22E75BK
Remove
the back
cover
Remove the
screws mark
in red to
remove the
back cover.
Remove
The hinge
plate
Remove the
six screws to
remove the
hinge plate
Remove
the Iron
Plate
Remove the
screws
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