TCL LCD-27VSE, 32LM051B6, 27LM051B6 Schematic
27’’ LCD TV Color Monitor TCL LCD-27VSE
Service
Service
Service
31.5-60 kHz
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 The Use Of Teletext……..........…...........…...........5
2.3 Front Panel Control Knobs.…............……...............6
2.4 OSD Operations.………........................…............7
2.5 How To Connect ……..............……………............14
3 Input/Output Specification…………..........................17
3.1 Input Signal Connector……..........................17
3.2 RGB Input Signal Timing.....……......................18
4. Mechanical Instructions…………………..................19
5. Repair Flow Chart.……………………………….....24
6. White Balance Luminance Adjustment….…........28
7.BOM List..…………………………....….…….....32
8. PCB Layout.………………………………....….......60
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
8.1 Main Board.……….......................................60
8.2 Tuner Board……………………………………..62
8.3 Power Board……..……..............................64
8.4 Key Board…...................................67
8.5 IR Board …................….......................67
8.6 DC-DC Board....…………...............................68
8.7 Earphone Board..…….....…..........................69
9. Block Diagram.…….........................................70
9.1 Main Board.………………………………..….70
9.2 Power Board…..…....………………….......71
9.3 Exploded View..……….....................…..72
10. Schematic Diagram………………………...73
10.1 Main Board………..………………………..73
10.2 Power Board.....…...................................85
10.3 Tuner Board...…….......................................87
10.4 Key Board……………….………………….90
10.5 Earphone Board...…….................................91
Horizontal Frequency
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27’’ LCD TV Color Monitor TCL LCD-27VSE
Revision List
Version Release Date Revision Instructions TPV Model
A00 Jul.-3-2006 Initial Release E276MTNBD1TL2P
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27’’ LCD TV Color Monitor TCL LCD-27VSE
1. Monitor Specifications
Items Specification
Panel Type 27” CMO V270B1-L01 panel
Driver Element a-si TFT active matrix
Aspect Ratio 16: 9
Pixel Number 1366 x 768
Active Display Area H x V 596.259mmx335.232mm
Pixel Pitch 0. 4365mm(H) x 0.4365mm(V)
LCD Panel
Video Inputs
Audio Output
OSD language (default)
Table Stand
Wall Mount
Power
Contrast Ratio 1000:1 (type)
Brightness 550:1 (type)
Response Time 8ms
View Angle (CR≥20) H: 176/V: 176
Display colors 16.7 million
Lamp Type/Life 60000 hr (type)
Color Temperature Cool / Warm
AV、 S-VIDEO, Component, Scart(RGB + Composite),HDMI
Audio Output: L / R Headphone Mini-jack for stereo (3.5ø)
English
Included
VESA 100 x 100 mm
Power Supply AC100V~240V, 50/60Hz
Power Consumption <150W
Panel Tilt
Environment
Forwards/Backwards/Rotation -4°/ +18° / ± 35°
Operating Tem. + 0 °C ~ + 40 °C
Storage Tem. - 25 °C ~ + 60 °C
Operating humidity 10% ~ 85%
Storage humidity 5% ~ 85%
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27’’ LCD TV Color Monitor TCL LCD-27VSE
2. Operations Instructions
2.1 The Use Of Remote Control
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27’’ LCD TV Color Monitor TCL LCD-27VSE
2.2 The Use Of Teletext
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27’’ LCD TV Color Monitor TCL LCD-27VSE
2.3 Front Panel Control Knobs
Power Key : Press to turn on or off the TV.
MENU Key : Press to show the OSD menu and exit OSD menu at the TV.
Down / Up Key : Press to perform select function and channel.
-/ + Key : Press to confirm your function selection and adjustment.
Source Key : Press to select your input source.
There is a wide range of video and audio equipment that can be connected to your TV. The following connection
diagrams show you how to connect them.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
2.4 OSD Operations
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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27’’ LCD TV Color Monitor TCL LCD-27VSE
2.5 How To Connect
Remove the back plate at the back of the TV as shown on the illustration opposite. Lay the LCD TV with the screen
down on a table, as it will be easier to connect your peripheral equipment. Please take your precautions not to
damage the screen.
AV sockets (Located at the back of the TV set, on the leftside)
To display images from the connected appliance, select the input source by pressing the TV/VIDEO button on the
remote control. For some appliances, connected to the SCART socket, this selection is made automatically.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
HEADPHONE SOCKET (LOCATED AT THE BACK OF THE TV SET, ON THE RIGHTSIDE)
When headphones are connected, the sound of TV set is cut.
Adjust headphones volume level by using + / - buttons on the remote control.
To switch off the sound of the headphone press the
button on the remote control.
HDMI SOCKET (High-Definition Multimedia Interface)
(Located At The Back Of The TV Set, Near The Power Input Socket)
This socket allows the connection to all appliances fitted with an HDMI socket.
The standard HDMI allows a digital transmisson of video and audio data using only one connector.
It gives you the possibility to obtain very high quality images.
In this case it is necessary to use an HDMI connecting cable.
Make sure the appliance output is set to be HDMI output.
To display images from the connected appliance, select the input source (HDMI) by pressing the TV/VIDEO button
on the remote control.
PC IN SOCKET (Located At The Back Of The TV Set, Near The HDMI Socket)
Allows to connect a PC to the TV set
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27’’ LCD TV Color Monitor TCL LCD-27VSE
Connect the PC IN D-sub socket located at the back of the TV set to the output of PC equipment through a mini
D-sub 15 pin cable. Connect the stereo PC IN audio jack located at the back of the TV set (near the D-sub socket) to
the audio output socket on the computer through an audio cable. To display images from the connected appliance,
select the input source (PC) by pressing the TV/VIDEO button on the remote control.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
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 N/C
5 GROUND
6 Red Video Ground
7 Green Video Ground
8 Blue Video Ground
9 No Pin
10 Sync. Ground
11 N/C
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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27’’ LCD TV Color Monitor TCL LCD-27VSE
3.2 RGB Input Signal Timing
Sync Polarity Presence Screen Mode
Horizontal Vertical Horizontal Vertical Normal
(4:3)
FULL
(16:9)
Dots×Lines
Horizontal
Frequency
(KHz)
Vertical
Frequency
(Hz)
720×400 31.47 70.08
640×480 31.50 60.00
640×480 37.50 75.00
640×480 37.86 72.81
800×600 37.90 60.32
800×600 46.90 75.00
800×600 48.08 72.19
1024×768 48.40 60.00
1280×768 47.7 60
NEG POS YES YES YES YES
NEG NEG YES YES YES YES
NEG NEG YES YES YES YES
NEG NEG YES YES YES YES
NEG NEG YES YES YES YES
NEG NEG YES YES YES YES
NEG NEG YES YES YES YES
YES YES YES YES YES YES
YES YES YES YES YES YES
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27’’ LCD TV Color Monitor TCL LCD-27VSE
4. Mechanical Instructions
Step Figure Description
Lay the
Preparation
LCD-TV on a
flat, soft and
clean surface.
Remove
the base
and stand
Remove
the back
cover
Remove the
hinge cover
and the
screws on the
stand to
remove the
stand and
base.
Remove the
seven screws
mark in red to
remove the
back cover.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
Remove
hinge
The
plate
Remove the
six screws to
remove the
hinge plate
1、Remove the
eleven screws
Remove
the shield
2.Push the
shield as the
arrowhead
direction.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
1.Remove the
six screws
marked in red
to remove the
inverter board.
2. Remove the
Remove
Inverter,
tuner and
power
board
eight screws
marked in red
to remove the
main board
and tuner
board
3.Disconnect
the connector
and remove
the tuner
board , power
board and
main board.
Remove the
two screws
and connector
to remove the
IR board.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
Remove
the
earphone
board
Remove
the bezel
Remove the
screws to
remove the
earphone
board.
Remove the
fourteen
screws to
remove bezel.
Remove
the main
frame
Remove the
screws to
remove main
frame.
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27’’ LCD TV Color Monitor TCL LCD-27VSE
The end
N/A
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27’’ LCD TV Color Monitor TCL LCD-27VSE
5. Repair Flow Chart
Defect Mode Failure Analysis Repair Testing
Abnormal
Display
Missing Line
Bright Dot
Dark Dot
Light Leakage
Mura
Image Sticking
Dot Defect
Brightness Spot
Dot Defect
Particle
No display Check Power Board
Check Panel
Panel Change
Change Power Board
A
Noise
Check Main board
Check Panel
Check Keyboard
Check Line Connected
Power board and Minored
Check Main board
Check Panel
Next Step
Change Main board
Change Panel
Change Keyboard
Change Wires
Change Main board
Change Panel
Test
NG
Completed
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27’’ LCD TV Color Monitor TCL LCD-27VSE
A
Noise Check Single Cable Change Single Cable
Flicker Check Main board Change Main board
Change Panel
Change Main board
Change Panel
Change LVD Cable
Change Panel
Abnormal
Gray
R\G\B
Display
Abnormal
Check Panel
Check Main board
Check Panel
Check LVD Cable
Check Single Cable Change Single Cable
Check Main board Change Main board
Check Panel
Monitor
Shut Down
No signal Check Single Cable Change Single Cable
Power on
Display
Abnormal
Check Power board Change Power board
Check Main board
Check Keyboard Change Keyboard
Check Main board
Check Main board
Change Main board
Change Main board
Change Main board
Next Step
Te st
A
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Completed
27’’ LCD TV Color Monitor TCL LCD-27VSE
A
LED Display
Abnormal
Abnormal
Keyboard
Abnormal
OSD
LED Off
LED Dark
LED Abnormal
LED Flicker
Check Wires
Check Main board
(DDC) U301 Rd
Check Keyboard
Check Main board
Change Keyboard or
Main board or wire
Change Keyboard or
Main board
Change Keyboard or
Main board or wire
Change Keyboard or
Main board or wire
Change Wires
Change Main board
Change Keyboard
Change Main board
Check LVDS Wire
Change LVDS Wire
Next Step
Te st
Completed
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27’’ LCD TV Color Monitor TCL LCD-27VSE
Key Board
OSD is unstable or not working
N
Is Key Pad Board connecting normally?
Y
Connect Key Pad Board
Is Button Switch normally?
Y
Is Key Pad Board Normally?
Y
Check Main Board
N
N
Replace Button Switch
Replace Key Pad Board
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27’’ LCD TV Color Monitor TCL LCD-27VSE
6. 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
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