This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair
the product or products dealt with in this service information by anyone else could result in serious injury or death.
3-1. Remove the Stand
3-2. Remove the Power Cord
3-3. Remove the Back Cover
3-4. Remove the Mainboard
3-5. Remove the speaker
3-6. Remove the Keypad
3-7. Remove the Remote Control Board
3-8. Remove the Stand backstop
3-9. Remove the indicator light
When servicing, observe the original lead dress. If a short circuit is found, replace all parts which
have been overheated or damaged by the short circuit.
After servicing, see to it that all the protective devices such as insulation barriers, insulation papers
shields are properly installed.
After servicing, make the following leakage current checks to prevent the customer from being
exposed to shock hazards.
1) Leakage Current Cold Check
2) Leakage Current Hot Check
3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive
1-3. Important Notice
1-3-1. Follow the regulations and warnings
Most important thing is to list up the potential hazard or risk for the service personnel to open
the units and disassemble the units. For example, we need to describe properly how to avoid the
possibility to get electrical shock from the live power supply or charged electrical parts (even the
power is off).
This symbol indicates that high voltage is present inside.It is dangerous to make any
kind of contact with any inside part of this product.
This symbol indicates that there are important operating and maintenance instructions
in the literture accompanying the appliance.
1-3-2. Be careful to the electrical shock
To prevent damage which might result in electric shock or fire, do not expose this TV set to
rain or excessive moisture. This TV must not be exposed to dripping or splashing water, and
objects fi lled with liquid, such as vases, must not be placed on top of or above the TV.
1-3-3. Electro static discharge (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive (ES) Devices. The following
3
Service Manual
Model No.: LEA40T3
techniques should be used to help reduce the incidence of component damage caused by
electros static discharge (ESD).
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical
ES devices are integrated circuits and some field-effect transistors and semiconductor "chip"
components. The following techniques should be used to help reduce the ncidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped
assembly, drain off any electrostatic charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available discharging wrist strap device, which
should be removed to prevent potential shock reasons prior to applying power to the unit under
test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a
conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of
the assembly.
1-3-4. About lead free solder (PbF)
This product is manufactured using lead-free solder as a part of a movement within the
consumer products industry at large to be environmentally responsible. Lead-free solder must be
used in the servicing and repairing of this product.
1-3-5. Use the genewing parts (specifi ed parts)
Special parts which have purposes of fi re retardant (resistors), high-quality sound (capacitors),
low noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture's specifi ed parts shown in
the parts list.
Safety Component
● Components identifi ed by mark have special characteristics important for safety.
1-3-6. Safety check after repairment
Confi rm that the screws, parts and wiring which were removed in order to service are put in the
original positions, or whether there are the positions which are deteriorated around the serviced
places serviced or not. Check the insulation between the antenna terminal or external metal and
the AC cord plug blades. And be sure the safety of that.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power source before:
4
Service Manual
Model No.: LEA40T3
a. Removing or reinstalling any component, circuit board module or any other receiver
assembly.
b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.
CAUTION:
may result in an explosion hazard.
2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage
measuring device (DVM, FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its assemblies.
4. Unless specified otherwise in this service manual, clean electrical contacts only by applying
the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable nonabrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99%
strength).
CAUTION:
Unless specifi ed otherwise in this service manual, lubrication of contacts is not required.
Capacitors may result in an explosion hazard.
5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this
service manual might be equipped.
A wrong part substitution or incorrect polarity installation of electrolytic capacitors
This is a fl ammable mixture.
6. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all
solid-state device heat sinks are correctly installed.
7. Always connect the test receiver ground lead to the receiver chassis ground before connecting
the test receiver positive lead.
Always remove the test receiver ground lead last. Capacitors may result in an explosion
hazard.
8. Use with this receiver only the test fi xtures specifi ed in this service manual.
CAUTION:
9. Remove the antenna terminal on TV and turn on the TV.
10. Insulation resistance between the cord plug terminals and the eternal exposure metal should
be more than Mohm by using the 500V insulation resistance meter.
11. If the insulation resistance is less than M ohm, the inspection repair should be required.
If you have not the 500V insulation resistance meter, use a Tester. External exposure metal:
Antenna terminal Headphone jack.
Do not connect the test fi xture ground strap to any heat sink in this receiver.
12. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
5
Service Manual
Model No.: LEA40T3
13. Use only an anti-static type solder removal device. Some solder removal devices not
classifi ed as "anti-static" can generate electrical charges suffi cient to damage ES devices.
14. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to
damage ES devices.
15. Do not remove a replacement ES device from its protective package until immediately
before you are ready to install it.
(Most replacement ES devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive material).
16. Immediately before removing the protective material from the leads of a replacement ES
device, touch the protective material to the chassis or circuit assembly into which the device will
be installed.
CAUTION:
precautions.
17. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise
harmless motion such as the brushing together of your clothes fabric or the lifting of your foot
from a carpeted fl oor can generate static electricity suffi cient to damage an ES device.)
Be sure no power is applied to the chassis or circuit, and observe all other safety
1-3-7. Ordering Spare Parts
Please include the following informations when you order parts. (Particularly the Version letter)
1. Model number, serial number and software version
The model number and serial number can be found on the back cover of each product. Software
version can be found in the Spare Parts List.
2. Spare part No. and description
Spare part No. and description can be found in the Spare Parts List.
1-3-8. Photo used in this manual
The illustration and photos used in this Service Manual may not base on the final design of
products, which may differ from your products in some way.
6
1-4. How to Read this Service Manual
1-4-1. Using icons:
Icons are used to attract the attention of the reader to specific information. The
meaning of each icon is described in the table below:
Note:
A “note” provides information that is not indispensable, but may nevertheless be
valuable to the reader, such as tips and tricks.
Caution:
A “caution” is used when there is danger that the reader, through incorrect
manipulation, may damage equipment, loose data, get an unexpected result or has to
restart(part of) a procedure.
Warning:
A “warning” is used when there is danger of personal injury.
Service Manual
Model No.: LEA40T3
Reference:
A “reference” guides the reader to other places in this binder or in this manual,
where he/she will fi nd additional information on a specifi c topic.
7
Service Manual
Model No.: LEA40T3
Chapter 2. Specifi cation
2-1. Specifi cation list
ModelLEA40T3
Screen size40 inch
Aspect ratio16:9
Resolution1920*1080
Response Time(ms)6 ms
Angel of view178
Contrast5000:1
Brightness450cd/m2
OSD languageEnglish etc.
Color systemATSC
Audio systemBTSC
Audio output power(Built-in)(W)9W*2
Audio output power(outer)(W)No
Total power input(W)120W
Voltage range(V)108-132V
Power frequency(Hz)60HZ
Net weight(KG)18.4
Gross weight(KG)26
Net dimension(MM)989*280*689
Packaged dimension(MM)1360*290*760
8
2-2. External pictures (four faces)
Service Manual
Model No.: LEA40T3
Front Side
Left Side
9
Service Manual
Model No.: LEA40T3
Chapter 3. Disassemble and Assemble
3-1. Remove the Stand
1. Lay down the unit so that back cover faces
upward
Back Side
2. Remove the Five screws from the back
cover which are indicated with the circles in the
picture above.
3. Remove the stand
10
3-2. Remove the Power Cord
Remove the screw indicated by the red
circles in below picture.
Then remove the power cord.
Service Manual
Model No.: LEA40T3
2. Then remove the back cover from the
unit.
3-3. Remove the Back Cover
1. Remove the twenty-two screws indicated
by the red circles in below picture.
3-4. Remove the Mainboard
Remove the five screws indicated by the red
circles in below picture.
Then remove the mainboard.
3-5. Remove the speaker
Remove the screw indicated by the red
circles in below picture.
Then remove the speaker.
11
Service Manual
Model No.: LEA40T3
3-6. Remove the Keypad
The Keypad is conglutinated with front frame
, just uncover the keypad gently.
Then remove the keypad.
3-8. Remove the Stand backstop
Remove the six screws indicated by the red
circles in below picture.
Take out the stand backstop.
3-7. Remove the Remote Control
Board
Remove the screw indicated by the red
circles in below picture.
Take out the remote control board.
3-9. Remove the indicator light
The indicator light is buckled into the front
frame,remove the clasp indicated by the red
circles in below picture.
Take out the indicator light.
12
Service Manual
Model No.: LEA40T3
Chapter 4. Location of Controls and Components
4-1. Board Location
A
B
C
No.Parts numberDescription
A Board CPANEL
B Board /Power Board
C Board MMainboard
4-2. Main Board
CND3
CNA1
CNE2
CND4
CND5
CON2
CNE1
13
Service Manual
Model No.: LEA46T3
4-2-1. Function Description:
Main Board
Process signal which incept from exterior equipment then translate into signal that panel can display.
4-2-2. Connector defi nition
Main board connector
Speaker connector (CON2)
Pin numberSignal name
1LOUT+
2LOUT3ROUT4ROUT+
12V/5V Connector (CNA1)
Pin numberSignal name
1+12V
2+12V
3GND
4+12V
5GND
6GND
75VSTB
8/
9GND
10PW-ON/OFF
11PB-ADJUS
12PB-ON/OFF
Keypad Connector (CNE2)
Pin numberSignal name
1GND
2KEY1
3KEY0
43.3VS
Rom connector (CNE1)
Pin numberSignal name
15VS
2IR
3LED-R
4LED-G
5GND
4-3. Power Supply Board
4-3-1. Function description:
To supply power for Mainboard, Panel.
4-3-2. Connector defi nition:
INPUT CONNECTOR (CN10)
14
Service Manual
Model No.: LEA40T3
Pin numberSignal name
1+12V
2+12V
3GND
4+12V
5GND
6GND
7+5VSB
8EXT_DIM
9GND
10PS-ON
11INT_DIM
12BL_ON
CNM801
4-4. LCD Panel
CN2
CN1
15
Service Manual
Model No.: LEA40T3
4-4-1. Function Description: Display the signal.
4-4-2. Connector defi nition:
CN1 Connector
Pin numberSymbolDescription
112VDC Power Supply
212VDC Power Supply
312VDC Power Supply
412VDC Power Supply
512VDC Power Supply
6NCNC
7GNDGround
8GNDGround
9GNDGround
st ,5th
10Rx1[0]N1
11Rx1[0]P1
12Rx1[1]N1
13Rx1[1]P1
14Rx1[2]N1
15Rx1[2]P1
LVDS Signal -
st ,5th
LVDS Signal +
st ,5th
LVDS Signal -
st ,5th
LVDS Signal +
st ,5th
LVDS Signal -
st ,5th
LVDS Signal +
16GNDGround
st ,5th
17Rx1CLK-1
18Rx1CLK+1
LVDS Clock -
st ,5th
LVDS Clock +
16
19GNDGround
st ,5th
20Rx1[3]N1
21Rx1[3]P1
22Rx1[4]N1
23Rx1[4]P1
LVDS Signal -
st ,5th
LVDS Signal +
st ,5th
LVDS Signal -
st ,5th
LVDS Signal +
24GNDGround
Pin numberSymbolDescription
Service Manual
Model No.: LEA40T3
25Rx3[0]N3
26Rx3[0]P3
27Rx3[1]N3
28Rx3[1]P3
29Rx3[2]N3
30Rx3[2]P3
rd,7th
LVDS Signal -
rd,7th
LVDS Signal +
rd,7th
LVDS Signal -
rd,7th
LVDS Signal +
rd,7th
LVDS Signal -
rd,7th
LVDS Signal +
31GNDGround
rd,7th
32Rx3CLK-3
33Rx3CLK+3
LVDS Clock -
rd,7th
LVDS Clock +
34GNDGround
rd,7th
35Rx3[3]N3
36Rx3[3]P3
LVDS Signal -
rd,7th
LVDS Signal +
rd,7th
37Rx3[4]N3
38Rx3[4]P3
LVDS Signal -
rd,7th
LVDS Signal +
39GNDGround
40NCNC
41NCNC
17
Service Manual
Model No.: LEA40T3
CN2 Connector
Pin numberSymbolDescription
112VDC Power Supply
212VDC Power Supply
312VDC Power Supply
412VDC Power Supply
512VDC Power Supply
6NCNC
7GNDGround
8GNDGround
9GNDGround
nd ,6th
10Rx2[0]N2
11Rx2[0]P2
12Rx2[1]N2
13Rx2[1]P2
14Rx2[2]N2
15Rx2[2]P2
nd ,6th
nd ,6th
LVDS Signal -
LVDS Signal +
nd ,6th
LVDS Signal -
nd ,6th
LVDS Signal +
nd ,6th
LVDS Signal -
LVDS Signal +
16GNDGround
nd ,6th
17Rx2CLK-2
18Rx2CLK+2
nd ,6th
LVDS Clock -
LVDS Clock +
19GNDGround
20Rx2[3]N2
nd ,6th
LVDS Signal -
18
21Rx2[3]P2
22Rx2[4]N2
23Rx2[4]P2
nd ,6th
LVDS Signal +
nd ,6th
LVDS Signal -
nd ,6th
LVDS Signal +
24GNDGround
25Rx4[0]N4
26Rx4[0]P4
27Rx4[1]N4
th,8th
LVDS Signal -
th,8th
LVDS Signal +
th,8th
LVDS Signal -
Pin numberSymbolDescription
Service Manual
Model No.: LEA40T3
28Rx4[1]P4
29Rx4[2]N4
30Rx4[2]P4
th,8th
LVDS Signal +
th,8th
LVDS Signal -
th,8th
LVDS Signal +
31GNDGround
th,8th
32Rx4CLK-4
33Rx4CLK+4
LVDS Clock -
th,8th
LVDS Clock +
34GNDGround
35Rx4[3]N4
36Rx4[3]P4
37Rx4[4]N4
38Rx4[4]P4
th,8th
LVDS Signal -
th,8th
LVDS Signal +
th,8th
LVDS Signal -
th,8th
LVDS Signal +
39GNDGround
40NCNC
41NCNC
42NCNC
43NCNC
44NCNC
45LVDS_SEL
HIGH (3.3V) Normal LVDS Format
LOW (GND) JEIDA LVDS Format
46NCNC
47NCNC
48NCNC
49NCNC
50NCNC
51NCNC
19
Service Manual
Model No.: LET40T3
Chapter 5. Installation Instructions
5-1. External Equipment Connections
Accessories
Remote Control
Antenna Connection:
Connect one end of a coaxial cable (not included) to the ANT IN jack on the back of your TV/DVD
combo, then connect the other end of the cable into the antenna or cable TV wall outlet.
different ways to connect your TV with different input sources. Choose the connection which is best
for you.
VCR connection
Connecting a VCR with a standard AV cable.
A standard AV connection provides good
video and audio.
To connect a VCR with a standard AV cable:
1 Make sure that your TV/DVD combo and
the VCR are turned off;
2 Connect a standard AV cable(not included)
to the VIDEO IN (yellow) and adjust R (red)
and L (white) AUDIO jacks on the back of your
TV/DVD combo, then connect the other end of
the cable to the VIDEO and AUDIO OUT jacks
on the VCR;
3 Turn on your TV/DVD combo and the VCR;
4 Press INPUT, press CH+ or CH- to select
VEDIO, then press ENTER.
21
Service Manual
Model No.: LET40T3
Connecting a VCR with an S-Video cable
An S-Video connection provides better video
than a standard AV connection.
To connect a VCR with an S-Video cable:
1. Make sure that your TV/DVD combo and
the VCR are turned off;
2. Connect an S-Video cable(not included)
to the S-VIDEO jack on the back of your TV/
DVD combo,then connect the other end of the
S-VIDEO OUT jack on the VCR;
3. Connect a standard audio cable(not
included)to the R and L AUDIO jacks to the
left of the VIDEO jack on the back of your TV/
DVD combo,them connect the other end of the
cable to the AUDIO OUT jacks on the VCR;
4. Turn on your TV/DVD combo and the VCR;
5. Press INPUT,press CN+ or CN- to select
S-VIDEO,then press ENTER.
External Equipment Connections: Connecting a component
video device
A component video device provides better
video than an S-Video connection.
To connect a component video device.
1. Make sure that your TV/DVD combo and
the component video device are turned off;
2. Connect a component video cable not
included to the Pr,Pb,and V jades on the back
of your TV/DVD combo,then connect the
other end of the cable to the corresponding
COMPONENT OUT jacks on the component
video device;
3. Connect a standard audio cable(not
included) to the R and L AUDIO jacks below the
Pr,Pb,and Y jacks on the back of your TV/DVD
combo,then connect the other end of the cable
to the COMPONENT AUDIO OUT jacks on the
VCR;
4. Turn on your TV/DVD combo and the
component video device;
5. Press INPUT,press CH+ or CH- to seclect
COMPONENT,then press ENTER.
22
Chapter 6. Operation Instructions
6-1. Front Panel Controls
Service Manual
Model No.: LEA32T3
23
Service Manual
Model No.: LEA32T3
6-2. Back Panel Controls
24
Service Manual
Model No.: LEA32T3
6-3 Setting Up Your Remote Control
After being setting up properly, your remote control can operate in six different modes:
TV, VCR, CABLE, DVD, SETBOX or AUDIO.
Pressing the corresponding button on the remote control allows you to switch between these modes,
PWM IN and DIMMING OUT will be used to DCR of PANEL.
33
B
A
22
11
V1
V1
V1
Rev
Rev
Rev
of
of
GND
AV33
+12V
TUNER_DATA
IF_AGCT
TUNER_CLK
VIN_ATV
VIP_ATV
AVDD33_SIF
AVDD33_DEMOD1
AVDD33_DIG
of
1315Friday, November 27, 2009
1315Friday, November 27, 2009
1315Friday, November 27, 2009
Drawn
Drawn
Drawn
1
GND3,4,5,6,7,8,9,10,11,12,14
2
3
4
+12V3,10,11,12,14
AV333,4,6,8,9,10,12
Title
Title
Title
TUNER
TUNER
TUNER
1
MT5305A P1V1
MT5305A P1V1
MT5305A P1V1
Document Number
Document Number
Document Number
C
C
C
Date:Sheet
Date:Sheet
Date:Sheet
Size
Size
Size
2
3
4
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
MediaTek Confidential
MediaTek Confidential
VIP_ATV4
AVDD33_SIF3,4,6,8,9,10,12
AVDD33_MPX4
IF_AGCT4
AVDD33_DIG3,4,6,8,9,10,12
TUNER_CLK4
TUNER_DATA4
VIN_ATV4
+5V_TUNER
ZR4
4.7K
ZR4
4.7K
ZR3
4.7K
ZR3
4.7K
TUNER_DATA
TUNER_CLKtuner_scl_T
ZR10100ZR10100
ZR9100ZR9100
Near Tuner
tuner_sda_T
VIN_ATV
VIP_ATV
C802
100pF/NC
C802
100pF/NC
C804
100pF/NC
C804
C800 10nFC800 10nF
100
100
DFAT_IN+
L153220nHL153220nH
L152 220nHL152 220nH
C801
C801
L154
390nH/NC
L154
390nH/NC
33pF
33pF
L158
330nH
L158
330nH
R1839
R1839
L1
330nH/NCL1330nH/NC
100
100
100pF/NC
C806 10nFC806 10nF
L157
L157
L156 220nHL156 220nH
DFAT_IN-
220nH
220nH
C810
C810
C2NCC2
20090612
IF_AGCTIF_AGC
Near IC
20090612
ZR26
ZR26
10K
10K
47nF
47nF
ZC32
ZC32
C798 27pFC798 27pF
ZC7
33pF
ZC7
33pF
ZC6
33pF
ZC6
33pF
ZR114.7kZR114.7k
ZC8
ZC8
IF_T_AGC
Near Tuner
10nF
10nF
C811
180pF
C811
180pF
R1838
R1838
Near TunerNear MT538X
C1NCC1
NC
LQM18NNR39K00
ZFB150ZFB15
0
ZFB14
ZFB14
NC/0603
NC/0603
ZFB13
ZFB13
NC/0603
Use muRata Inductor and TDK Capacitor
muRata: LQM18NNR22K00
C80727pFC80727pF
180pF
180pF
NC
ZFB12
ZFB12
ZFB110ZFB11
ZFB10
ZFB10
ZFB9
ZFB9
ZFB8
ZFB8
ZFB7
ZFB7
ZFB6
ZFB6
NC/0603
NC/0603
NC/0603
0
NC/0603
NC/0603
NC/0603
NC/0603
NC/0603
NC/0603
NC/0603
NC/0603
NC/0603
NC/0603
+5V_TUNER+12V
CB398
CB398
AVDD33_DEMOD1
NEAR ICNEAR ICNEAR IC
AV33AV33AV33
AVDD33_SIF
AVDD33_DIG
0.1uF
0.1uF
ZR150ZR15
0
ZC50
0.1uF
ZC50
0.1uF
AVSS33_DEMOD1
ZC47
0.1uF
ZC47
0.1uF
AVSS33_SIF
ZC44
0.1uF
ZC44
0.1uF
AVSS33_DIG
MediaTek Confidential
MediaTek Inc.
MediaTek Inc.
MediaTek Inc.
U9
7805U97805
3
ZR60ZR60
ZR80ZR80
IF_T_AGC
DFAT_IN+
DFAT_IN-
tuner_scl_T
tuner_sda_T
8
3
6
5
10
11
9
4
NC
NC
DIF
DIF
SCL
SDA
AS_IF
IF AGC
5
DD
CC
+5V IF
7
FB
ZFB5FBZFB5
+5V_TUNER
CB399
CB399
0.1uF
0.1uF
+
+
ZC9
ZC9
NC
1
47uF/16v
47uF/16v
NC
2
GND12GND13GND14GND
15
TU1
DVT-8ADC/GW41F2
TU1
DVT-8ADC/GW41F2
BB
OUT
GND
2
IN
1
CB197
CB197
0.1uF
0.1uF
POWER SUPPLY +5V FOR TUNER
TUNER POWER +5V_TUNER
5
AA
GND
GND3,4,5,6,7,8,9,10,11,12,13
1
2
+5VSB
+5VSB3,6,9
+3V3SB
+3V3SB3,6,9
+12V
+5V
+12V3,10,11,12,13
+5V3,6,8,10,12
OPWRSB
OPWRSB4
OPCTRL2
VCCK
ADIN4
VCCK3,4
ADIN44
OPCTRL24,6
DVD POWER SUPPLY
DIMMING
DIMMING12
OPWM2
BL_ON/OFF
OPWM212
BL_ON/OFF12
CN6
CN6
5
T12T12
+5V_DVD
V1
V1
V1
Rev
Rev
Rev
of
of
of
1415Monday, March 29, 2010
1415Monday, March 29, 2010
1415Monday, March 29, 2010
By Ray
Drawn
Drawn
Drawn
MediaTek Confidential
MediaTek Confidential
MediaTek Confidential
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
TEL:(03)567-0766 FAX:(03)578-7610
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
MediaTek Inc.
MediaTek Inc.
MediaTek Inc.
T11T11
GND3GND4+12V
STB1+5V
DVD_PWR
DVD_PWR
2
ESD_0402_10pF
ESD_0402_10pF
ESD_0402_10pF
ESD_0402_10pF
12
D14
D14
12
D13
D13
12
10nF
10nF
CPC30
CPC30
0.1uF
0.1uF
CPC29
CPC29
1uF
1uF
CPC28
CPC28
CPC31
CPC31
+
+
470UF/16V
470UF/16V
R4
12K_1%
R0603/SMD
R4
12K_1%
R0603/SMDR72.7K_1%
R7
R0603/SMD
2.7K_1%
R0603/SMD
+5V_DVD
R5
R5
CPC37
CPC37
CPC32
CPC32
CPC38
CPC38
+
+
CPC34
CPC34
12K_1%
R0603/SMD
12K_1%
R0603/SMD
10nF
10nF
0.1uF
0.1uF
1uF
1uF
220uF/16v
220uF/16v
R9
R9
2.7K_1%
R0603/SMD
2.7K_1%
R0603/SMD
1
MT5305A P1V1
MT5305A P1V1
MT5305A P1V1
BACK LIGHT/MAIN POWER
BACK LIGHT/MAIN POWER
BACK LIGHT/MAIN POWER
Document Number
Document Number
Document Number
C
C
C
Date:Sheet
Date:Sheet
Date:Sheet
Size
Size
Size
Title
Title
Title
2
3
4
5
+12V_DVD
CPR14 0
R1206/SMD
CPR14 0
R1206/SMD
R31KR31K
CNA1
CNA1
5V&12V
+12V
+5VSB
ADIN4
T6T6
T4T4
T5T5
+5VSB
XR71KXR7
1K
+12V
MAIN POWER
Hi : DVD Work
Lo : DVD Standby
T2T2D12ESD_0402_10pFD12ESD_0402_10pF
T3T3
T1T1
TJC3-7A
SIP-7P-2.5/HAIER_W
TJC3-7A
SIP-7P-2.5/HAIER_W
1234567
SW_POWER
1
XQ2
XQ2
OPWRSB
LO = > POWER_ON
HI = > STANDBY
XR10
XR10
32
2N3904
2N3904
4.7K
4.7K
XR14
XR14
0.925 x (1+Rup/Rdn) = 5.04V
L5_9
L5_9
12
10uH/3A
CPU1
CPU1
10uH/3A
L3
L3
3
MP1484
MP1484
2
C19
C19
OUT
VCC
7
shielding of 20-mil GND
D3
B340/NCD3B340/NC
10nF
10nF
1
5
FB
BST
EN
6
GND
SS8COMP
4
C18
0.1uF
C18
0.1uF
R8
C4
2.2KR82.2K
10nFC410nF
5V MAIN POWER
R89
100K
R89
100K
Q4
2N3904Q42N3904
32
1
R21
100K
R21
100K
C13
0.1uF
C13
47K
47K
0.1uF
+
+
+12V+5V
CE649
CE649
220uF/16V
220uF/16V
Q3
1
R2010KR2010K
VCCK
2N3904Q32N3904
32
C3
0.1uFC30.1uF
L5_9
L5_9
12
10uH/3A
10uH/3A
L4
L4
D11
B340/NC
D11
B340/NC
C21
10nF
C21
10nF
1
3
BST
OUT
CPU2
MP1484
CPU2
MP1484
EN
VCC
SS8COMP
7
2
6
C20
C20
C5
10nFC510nF
R10
R10
DVD 5V POWER (OPTION)
R90100KR90100K
C14
0.1uF
C14
0.1uF
+
+
+12V
CE2
CE2
220uF/16V
220uF/16V
0.925 x (1+Rup/Rdn) = 5.04V
shielding of 20-mil GND
5
FB
GND
4
0.1uF
0.1uF
2.2K
2.2K
Q46
2N3904
Q46
2N3904
32
1
R9110KR9110K
Lo : DVD PowerOn
Hi : DVD PowerOff
OPWM2
3
4
5
DD
CC
BB
AA
1
ADIN5
Hi : No disk load
Hi->Lo->Hi : Disk loaded
R1850 1KR1850 1K
DVD_Y_IN#
DVD_PB_IN#
DVD_PR_IN#
2
5IR7
1
4
3
2
Y_IN
GND
PB_IN
DETECT
Inner DVD &L/R INPUT
3
T10T10
6
PR_IN
DVD_IR
GND
12
12
12
12
12
T9T9
D83D83
D82D82
D78D78
D85D85
D84D84
CN13
CN13
DVD_YPbPr_IN
DVD_YPbPr_IN
BC32 15pFBC32 15pF
BR42 75BR42 75
BC31 15pFBC31 15pF
BR41 75BR41 75
BC33 15pFBC33 15pF
BR43 75BR43 75
DVD_L#
DVD_R#
GC16 2.2uFGC16 2.2uF
GC17 2.2uFGC17 2.2uF
OC26
560pF
OC26
560pF
47K
47K
GR23
GR23
OC25
560pF
OC25
560pF
47K
47K
GR24
GR2610KGR2610K
GR2510KGR2510K
DVD_L_IN
DVD_R_IN
123
DVD_LR_IN
DVD_LR_IN
GR24
D73D73
12
12
D72D72
CN14
CN14
T13T13
NEARLY CONNECTOR
SY0
SC1
47nF
SC1
47nF
SR12
100
SR12
100
NEARLY VGA CON.NEARLY IC
SR11 0SR11 0
12
SY0_IN
34
P6 S-VdieoP6 S-Vdieo
25
SV INPUT
SC2
47pF
SC2
47pF
SR1375SR13
75
SD3
ESD_0402_10pF
SD3
ESD_0402_10pF
61
7
SC3
47nF
SC3
47nF
SR14
100
SR14
100
SR15 0SR15 0
12
SC0_INSC0
SC4
47pF
SC4
47pF
SR1675SR16
75
SD2
ESD_0402_10pF
SD2
ESD_0402_10pF
OPWM0 4,7
OPWM1 4,7
DVD_IR 6
AIN4_L
AIN4_R
AV33
SY0
SC0
ADIN5
SOY1
Y1P
Y1P
SOY1
AIN4_R
AIN4_L
AV33
SY0
SC0
AV33
SV Audio Shares with AV2(Horizotal),which input to AIN0_L/R
ADIN5
BR4410KBR4410K
C672
10uF/10v
C672
10uF/10v
C931
0.1uF
C931
0.1uF
BR45
10K
BR45
10K
C673
C673
JRN3
47K
JRN3
47K
12
34
56
78
12
34
56
78
47K
47K
JRN2
JRN2
COM1
10uF/10v
10uF/10v
OPCTRL3
COM1
PR1P
PB1P
PR1P
PB1P
OPCTRL3
OPWM0
OPWM1
DVD_IR
AIN4_R
OPWM0
OPWM1
OPWM1/OPWM0=(0/0) YPbPr2 Audio =>AIN4_L/R;
OPWM1/OPWM0=(0/1) DVD Audio =>AIN4_L/R;
BR401KBR401K
BR1310KBR1310K
BR1110KBR1110K
GC13 2.2uFGC13 2.2uF
BR47NCBR47NC
13
16
9
8
6
A10B
INH
VCC
GND7GND
1-COM
2Y342Y1
1Y2151Y1
1Y0121Y3
2
14
11
Y2_R#
DVD_R#
U67
U67
AIN4_L
BR31KBR31K
GC12 2.2uFGC12 2.2uF
3
2-COM
2Y012Y2
Y2_L#
5
DVD_L#
GND
GND4,5,6,7,8,9,10,11,12,13,14
AIN4_L
74LV4052D
74LV4052D
BR480/NCBR480/NC
Y2_L#
MediaTek Confidential
MediaTek Confidential
MediaTek Confidential
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
No.1-2, Innovation Rd 1, SBIP, Hsin-Chu City 300
AIN4_R
BR490/NCBR490/NC
Y2_R#
without InnerDVD:
BR48/BR49 should be SMT ;74HC4052 will be NC.
V1
V1
V1
Rev
Rev
Rev
of
of
of
1515Friday, December 04, 2009
1515Friday, December 04, 2009
1515Friday, December 04, 2009
Drawn
Drawn
Drawn
TEL:(03)567-0766 FAX:(03)578-7610
TEL:(03)567-0766 FAX:(03)578-7610
TEL:(03)567-0766 FAX:(03)578-7610
MediaTek Inc.
MediaTek Inc.
MediaTek Inc.
1
MT5305A P1V1
MT5305A P1V1
MT5305A P1V1
DVD/YPbPr2/S_video Input
DVD/YPbPr2/S_video Input
DVD/YPbPr2/S_video Input
Document Number
Document Number
Document Number
C
C
C
Date:Sheet
Date:Sheet
Date:Sheet
Size
Size
Size
Title
Title
Title
2
with InnerDVD:
BR48/BR49 resistor will be NC; 74HC4052 will be SMT.
3
SOY1
Y1P
BC31.5nF BC31.5nF
BC410nF BC410nF
BR568BR5
NEARLY ICNEARLY YPBPR CON.
68
4
5
BR418 BR418
Y2_SWO
BL1
80/100MHZ/NC
BL1
80/100MHZ/NC
12
Y_IN#2
YPBPR/RL#2 INPUT
COM1
PB1P
BC710nF BC710nF
BC610nF BC610nF
BR1068 BR1068
BR8100 BR8100
BC5
15pF
BC5
15pF
BR656BR6
56
Connected to connector GND
BR918 BR918
PB2_SWO
BR70BR70
BD3
BD3
ESD_0402_10pF
ESD_0402_10pF
BR1775BR17
75
Y_IN#2
867523
redgb
redgb
BL2
BL2
PB_IN#2
PB_IN#2
4
BC9
15pF
BC9
15pF
BR1256BR12
56
BD4
BD4
80/100MHZ/NC
80/100MHZ/NC
ESD_0402_10pF
ESD_0402_10pF
12
BR2975BR29
75
PR_IN#2
BP1
BP1
1
RCA3X1
RCA3X1
BC11
15pF
BC11
15pF
BR1456BR14
56
BD5
BD5
ESD_0402_10pF
ESD_0402_10pF
12
BR3075BR30
75
PR1P
BC1210nF BC1210nF
BR1668BR1668
BR1518 BR1518
PR2_SWO
80/100MHZ/NC
80/100MHZ/NC
BL3
BL3
without InnerDVD:
PR_IN#2
Y2_L#
Y2_R#
GC14 2.2uFGC14 2.2uF
GC15 2.2uFGC15 2.2uF
OC24
OC24
47K
47K
GR13
GR13
OC23
OC23
47K
47K
GR14
GR14
NEARLY CONNECTOR
75ȍ resistor will be NC;
5V330 video switch will be NC;
with InnerDVD:
BL1/BL2/BL3 will be NC ;
BP2
BP2
RCA2X1
RCA2X1
GR2110KGR2110K
GR2210KGR2210K
YPBPR_L_IN#2
YPBPR_R_IN#2
4
2
redw
redw
1
35
12
12
560pF
560pF
560pF
560pF
BD2
BD2
ESD_0402_10pF
ESD_0402_10pF
BD1
BD1
ESD_0402_10pF
ESD_0402_10pF
AV33
AV33AV33
R1853
R1853
R1859
R1859
R1858
R1858
10K
10K
10K
10K
10K
10K
CE658
CE658
PR_IN#2
PB_IN#2_SW
CE656
CE656
CE654
CE654
Y_IN#2PB_IN#2Y_IN#2_SWPR_IN#2_SW
R1862
10K
R1862
10K
10uF/10V
10uF/10V
R1860
10K
R1860
10K
10uF/10V
10uF/10V
R1857
10K
R1857
10K
10uF/10V
10uF/10V
AV33AV33
AV33
R1855
R1855
R1854
R1854
R1851
R1851
10K
10K
10K
10K
10K
10K
DVD_PR_IN#_SWDVD_Y_IN#
CE659
CE659
DVD_PR_IN#
CE657
CE657
DVD_Y_IN#_SWDVD_PB_IN#DVD_PB_IN#_SW
CE655
CE655
R1861
10K
R1861
10K
10uF/10V
10uF/10V
R1852
10K
R1852
10K
10uF/10V
10uF/10V
R1856
10K
R1856
10K
10uF/10V
10uF/10V
AV33
C671
C671
CB1005
0.1uF
CB1005
0.1uF
10uF/10v
10uF/10v
U53
U53
16
15
E#
VCC
I0A2I1A3S1YA4I0B5YB7GND
Y_IN#2_SW
YPBPR2/DVD_SEL
SR18 10KSR1810K
OPCTRL3
YPbPr2 & DVD VIDEO SWITCH
4
PR_IN#2_SW
DVD_PR_IN#_SWY2_SWO
12
9
14
11
10
YD
YC
I0D
I1D13I0C
I1C
I1B
PI5V330
PI5V330
6
8
PB_IN#2_SWPR2_SWO
DVD_PB_IN#_SW
DVD_Y_IN#_SW
PB2_SWO
5
OPCTRL3=1::DVD
OPCTRL3=0::YPBPR2
DD
CC
BB
AA
PANEL
Power Cord
POWER
SUPPLY
PD801
Keypad Assembly
JP1
Speaker
CN2
CN1
Connection Wire(Control
CNM801
LVDS Wire
LVDS Wire
)
Speaker Wire
Connection
Wire(12V/5V )
CN4
CN8
CN5
CN10
Mainboard
Assembly
CNB3
CNB4
Remote Control Board
Assembly
Connection Wire(Remote
CN27
CNE2CNE3
)
Connection Wire(Lamp
)
8
0090402750
7
6
5
4
3
2
1
NO.
Connection Wire(Lamp)
Connection Wire(Remote
Connection Wire(Control
Speaker Wire
LVDS Wire
LVDS Wire
Connection Wire(12V/5V )
Power Cord
NAME
)
)
1
1
1
1
1
1
1
1
QTY
Service Manual
Model No.: LEA40T3
Chapter 8. Measurements and Adjustments
8-1. Service Mode
8-1-1.How to enter into Service Mode
The way to the factory mode menu:
1st, press menu,
2en, input 8893,
Finished these operations ,system will be into the factory mode menu.
At the end of the main factory menu, you can see the edition of the software,
like this” L_MSD209_AU32 ”.
8-1-2.How to exit
If you want to exit this factory menu, please press the button ”Exit” on the remote.
system will be out the factory mode menu.
8-2. Measurements and Adjustments
8-2-1. The Main Menu
In factory mode menu,press up/down button to choose the up/down item,press left/right button
to the submenu,press "OK"button to affi rm .press MENU button go to the next page.
MSD209 Factory Menu
In this page, you just consider "RESET
ALL" function.This function you can reset all
date return to factory state.if you encounter
inextricable problem,you can try this function.
Press
ALL",press "OK" button.It needs a few
secounds.
NOTE : After reset ,please shut off the power.
Be carefully use this function.
up/down button to select "RESET
46
8-2-2. Video
Service Manual
Model No.: LEA40T3
Color Temperature
This page is control the Color Temperature,
and the picture size.
Picture Mode
This page is control the picture effect , like
Brightness,contrast,color,sharpness.
47
Service Manual
Model No.: LEA40T3
8-2-3. Audio
This page is control the sound effect ,from
100Hz to 10KHz.
8-2-4. Software UpDate
In this page , you just consider the software
update function.Plug USB into the 1st USB port
,select "SOFTWARE UPDATE" press "OK", Then
flip the other window,perss "OK",The update is
going work.
48
NOTE : After software update ,turn to the Factory
Setting 1 page reset all.
Chapter 9. Trouble shooting
9-1. Simple check
Verify if the television is properly plugged
No picture/ No sound
Blank screen
Verify if the television is properly supplied power
Verify if electricity is available.
Verify if correct signals are input
Press INPUT button to change signal input to TV input
Restart the television of power supply is interrupted
Service Manual
Model No.: LEA40T3
No sound
Poor sound
No picture in some channel
No color for some channel program
(black and white)
Spots with some or all pictures
Press Mute button and verify if Mute mode is set.
Switch to otger channel and verify if the same problem
happens.
Press VOL+ button to see of he problem can be solved.
Verufy if sound system is correct .Refer to some chapter for
adjust.
Verify if correct channel is selected.
Adjust the antenna.
Make adjustments by Fine Tune and MANUAL Scan.
Verify if the same problem exists in other channels.
check out of picture and sound system.
Refer to relative instructions in the Manual for color adjust.
Verify if the antennal is correctly connected.
Verify if the antennal is in good condition.
Make fi ne adjustment of channel.
Horizontal/ vertical bars or picture
shaking
Television out of control
Check for local interference such as an electrical appliance
or power tool.
Disconnect the television from power supply and 10
seconds later, connect the television to the power supply.
If the problem still exists, contact authorized after-sales
service for technical assistance.
49
9-3. Mainboard Failure Check
Symptom: No Sound
No Sound
(All Mode)
Service Manual
Model No.: LEA40T3
Check the input
Source
Pass
Check the
input/output
Pass
Check the
input/output
Pass
Fail
Fail
Fail
Change Source input
Re-soldering or change
IC U13
Re-soldering or change
IC U55
Check the
input/output
Pass
Check the
Speaker
Pass
Check the
Sperker wire
Fail
Re-soldering or change
IC U2
Fail
Change the Speaker
51
Service Manual
Model No.: LEA40T3
9-4. Pannel Failure
Failure Mode
Block Defect :TCP cracking or cracking
Dim or L/D :TCP Sunken
:TCP lead cracking
:ACF bonding short
:Awful environment and
something electric enter
into LCD
:Mis-align between TCP and
Panel
:Panel failure
:TCP failure
Vertical color line(light or
dark forever)
Horizontal line(light or
dark forever)
52
V B/DVertical bar
PartNameDescriptionPhenomenaFailure cause
V DimVertal gray line
V L/D
TCP
H B/DHorizontal bar
H DimHorizontal gary line
H L/D
Bladder between Polarizer and
top glass
Service Manual
Model No.: LEA40T3
1.Chip lose action
2.IC ahort or jointiog bad
3.Pannel and vsc connect bad
Dot DefectBright dot dark dot in pannelIncoming Inspection Standard
PartNameDescriptionPhenomenaFailure Cause
Polarizer BubbleBladder in Polarizer
Panel or Polarlzer
Polarizer ScratchPolarizer ScratchTine or rigidity arose