Akai LEA-22H03P User manual

LEA-22H03P

LCD TV
Model No.
Chassis
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.
©2009 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
SERVICE MANUAL
WARNING
MT8222
LEA-22H03P

Service Manual
Model No.:LEA-22H03P
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CONTENTS
Chapter 1.General Information
1-1. Document Information........................................................................... 3
1-2. General Guidelines ................................................................................ 3
1-3. Important Notice ..................................................................................... 3
1-3-1. Follow the regulations and warnings ..................................................... 3
1-3-2. Be careful to the electrical shock........................................................... 3
1-3-3. Electro static discharge (ESD)............................................................... 3
1-3-4. About lead free solder (PbF).................................................................. 4
1-3-5. Use the genewing parts (specified parts) .............................................. 4
1-3-6. Safety check after repairment................................................................ 4
1-3-7. Ordering Spare Parts............................................................................. 6
1-3-8. Photo used in this manual ..................................................................... 6
1-4. How to Read this Service Manual ...................................................... 6
1-4-1. Using icons: ........................................................................................... 6
Chapter 2. Specification
2-1. Specification list ...................................................................................... 8
2-2. External pictures (four faces) .............................................................. 9
Chapter 3. Disassemble and Assemble
3-1. Remove the Stand ............................................................................... 11
3-2. Remove the Back Cover..................................................................... 11
3-3. Remove the Remove the Main Board & Small Board ................. 12
3-3-1. Remove the Mainboard and the Driver Board........................... 12
3-3-2. Remove the Remote Control Board..................................................... 12
3-3-3. Remove the Keypad Board.................................................................. 12
3-3-4. Remove the Speakers ......................................................................... 12
Chapter 4. Location of Controls and Components
4-1. Board Location...................................................................................... 13
4-2. Main Board ........................................................................................... 13
4-2-1. Function Description:........................................................................... 14
4-2-2. Connector definition............................................................................. 14
4-3. Driver Board........................................................................................... 16
4-4. Remote Control Board ..................................................................... 16
4-5. LED Panel ............................................................................................. 16
4-4. LCD Panel.............................................................................................. 16

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Chapter 5. External Equipment Connections
5-1. Antenna Connection ............................................................................ 17
5-2. VCR Connection................................................................................... 18
5-3. DVD Connection................................................................................... 18
5-4. HDMI or DVI Connection.................................................................... 18
5-5. PC Connection...................................................................................... 19
5-6. Monitor Out Connection...................................................................... 19
5-7. Headphones Connection.................................................................... 20
5-8. Power Source........................................................................................ 20
5-9. Recommendation input Format ........................................................ 20
Chapter 6. Operation Instructions
6-1. Front Panel Controls............................................................................ 21
6-2. Back Panel Controls ............................................................................ 21
Chapter 7. Electrical Parts
7-1. Block Diagram....................................................................................... 22
7-2. Wiring Connection Diagram............................................................... 22
7-3. Circuit Diagram ..................................................................................... 22
Chapter 8. Measurements and Adjustments
8-1. Service Mode ....................................................................................... 23
8-1-1.How to enter into Service Mode............................................................ 23
8-1-2.How to exit............................................................................................ 23
8-2. Measurements and Adjustments ...................................................... 23
8-2-1. Factory Menu 1.................................................................................... 23
8-2-2. Factory Menu 2.................................................................................... 24
8-2-3. Factory Menu 3.................................................................................... 25
8-2-4. Factory Menu 4.................................................................................... 25
8-2-5. Factory Menu 5.................................................................................... 26
8-2-6. Factory Menu 6.................................................................................... 26
Chapter 9. Trouble shooting
9-1. Simple check ......................................................................................... 27
9-2. Mainboard Failure Check. .................................................................. 28
9-3. Pannel Failure ...................................................................................... 29

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Chapter 1.General Information
1-1. Document Information
Document format: Adobe PDF
Author:
Compiler:
1-2. General Guidelines
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 filled with liquid, such as vases, must not be placed on top of or above the TV.
1-3-3. Electro static discharge (ESD)

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Some semiconductor (solid state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive (ES) Devices. The following
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 (specified parts)
Special parts which have purposes of fire retardant (resistors), high-quality sound (capacitors),
low noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture's specified parts shown in
the parts list.
Safety Component
● Components identified by mark have special characteristics important for safety.
1-3-6. Safety check after repairment
Confirm 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

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1. Always unplug the receiver AC power cord from the AC power source before:
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: A wrong part substitution or incorrect polarity installation of electrolytic capacitors
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 non-
abrasive applicator; 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%-99%
strength).
CAUTION: This is a flammable mixture.
Unless specified 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.
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 receiverground lead to the receiverchassis 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 fixtures specified in this service manual.
CAUTION: Do not connect the test fixture ground strap to any heat sink in this receiver.
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.

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12. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
13.Use only an anti-static type solder removal device. Some solder removal devices not
classified as "anti-static" can generate electrical charges sufficient 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 withleads electrically shorted together by
conductive foam, aluminum foil or comparable conductive material).
16.Immediately before removing the protective material from the leads ofa replacement ES
device,touchthe protective material to the chassis or circuit assembly into whichthe device will
be installed.
CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety
precautions.
17.Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise
harmless motion such as the brushing together ofyour clothes fabric or the lifting ofyour foot
from a carpeted floor can generate static electricity sufficient to damage an ES device.)
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.

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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.
Reference:
A “reference” guides the reader to other places in this binder or in this manual,
where he/she will find additional information on a specific topic.

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Model LE22T3
Screen Size 22 inches
Aspect Ratio 16:9
Resolution 1920*1080
Response Time (ms) 5ms
Angel of View H:170/V:160
Color Display 16.7M
No. of Preset Channels 256
OSD Language English Russian
Color System SECAM
Audio System BG
Audio Output Power (Built-in) (W) 2.5W*2
Audio Output Power (outer) (W) No
Total Power Input (W) 35W
Voltage Range (V) AC100V~240V
Power Frequency (Hz) 50~60Hz
Time of Sleep Timer (MINS) 120Min
Net Weight (KG) 4.7
Gross Weight (KG) 5
Net Dimension (MM)
Packaged Dimension (MM)
Chapter 2. Specification
2-1. Specification list
528/160/388
620/120/445

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2-2. External pictures (four faces)
Front Side
Left Side

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Right Side
Back Side

Chapter 3. Disassemble and Assemble
3-1. Remove the Stand
1. Lay down the unit so that back cover faces
upward.
2. Remove the 1 screw from the back cover
which are indicated with the number in the
picture above.
3-2. Remove the Back Cover
1. Remove the 2 and 3 screws indicated in
picture 1.
2.Uncover the equipment, the FFC wire and
LVDS wire are shown below(See picture 3).
Remove the FFC wire and LVDS wire from
the panel.
3. Then remove the back cover from the unit.
(See picture 4).
picture 1
picture 3
picture 4
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3-3. Remove the Main Board &
Small Board
There are four boards in the machine:
A:Remote Control Board;B:Main Board;C:LED
Driver Board ;D:Keypad Board (See picture 5).
3-3-1. Remove the Mainboard and the
Driver Board
3-3-2.Remove the Remote Control Board
3-3-3. Remove the Keypad Board
There's no screw in this board,pull the keypad
board out from Front Cabinet directly.
3-3-4. Remove the Speakers
Remove the two screws indicated in picture 9
Take out one speaker,then another as this.
picture 5
Remove the six screws indicated in picture 6.
Take out the mainboard and the drive board.
picture 6
Remove the screw indicated in picture 7.
Take out the mainboard and the drive board.
picture 7
picture 8
picture 8
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Chapter 4. Location of Controls and Components
4-1. Board Location
No. Parts number Description
A Borad 0090720951B Remote Control Board
B Borad Main Board
C Borad 0090724838 LED Driver Board
D Borad 0090722685 Keypad Board
4-2. Main Board
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DZ0XG0E0A00

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 denition
Main board connector
CNE1 CNE2
Pin number Signal name Pin number Signal name
1+5V 1GND
2 IR 2 KEY1
3 RED 3 KEY2
4 GREEN
5 GND
CNB1(No use) CNB2(No use)
Pin number Signal name Pin number Signal name
1GND 1+5V
2 TXD 2 GND
3 RXD 3 SCL
4 +5V 4 SDA
CON1 CNC1
Pin number Signal name Pin number Signal name
1PS_ON 1L_N
2 GND 2 L_P
3 GND 3 R_N
4 ADJ 4 R_P
5 ON/OFF
6 +12V
7 +12V
Notes:
CNE1:Remote Control connector ; to A Board
CNE2:Keypad connector ; to D Board
CNB1:Sensitization connector
CNB2:Upgrade connector
CON1:Driver connector ; to C Board
CNC1:Speaker connector ; to Speaker
CND3:LVDS connector ; to Panel
CND3
Pin number Signal name
1 RXO0-
2 RXO0+
3 RXO1-
4 RXO1+
5 RXO2-
6 RXO2+
7 GND
8 RXOC-
9 RXOC+
10 RXO3-
11 RXO3+
12 RXE0-
13 RXE0+
14 GND
15 RXE1-
16 RXE1+
17 GND
18 RXE2-
19 RXE2+
20 RXEC-
21 RXEC+
22 RXE3-
23 RXE3+
24 GND
25 NC
26 NC
27 NC
28 VCC
29 VCC
30 VCC
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4-3. Driver Board
4-4. Remote Control Board
CN1 Signal name
1 PS_ON
2 GND
3 GND
4 ADJ
5 ON/OFF
6 +12V
7 +12V
4-5. LED Panel
Function description:To supply power for Panel.
CN1 Signal name
1 +5V
2 IR
3 RED
4 GREEN
5 GND
Function description:receive remote control
signal
Function description:Display program
Connector denition:
Connector denition:
Connector denition:
see next page
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Pin number Signal name Description
1 RXO0- minus signal of odd channel 0(LVDS)
2 RXO0+ plus signal of odd channel 0(LVDS)
3 RXO1- minus signal of odd channel 1(LVDS)
4 RXO1+ plus signal of odd channel 1(LVDS)
5 RXO2- minus signal of odd channel 2(LVDS)
6 RXO2+ plus signal of odd channel 2(LVDS)
7 GND GND
8 RXOC- minus signal of odd clock channel (LVDS)
9 RXOC+ plus signal of odd clock channel (LVDS)
10 RXO3- minus signal of odd channel 3(LVDS)
11 RXO3+ plus signal of odd channel 3(LVDS)
12 RXE0- minus signal of even channel 0(LVDS)
13 RXE0+ plus signal of even channel 0(LVDS)
14 GND GND
15 RXE1- minus signal of even channel 1(LVDS)
16 RXE1+ plus signal of even channel 1(LVDS)
17 GND GND
18 RXE2- minus signal of even channel 2(LVDS)
19 RXE2+ plus signal of even channel 2(LVDS)
20 RXEC- minus signal of even clock channel
21 RXEC+ plus signal of even clock channel (LVDS)
22 RXE3- minus signal of even channel 3(LVDS)
23 RXE3+ plus signal of even channel 3(LVDS)
24 GND GND
25 NC NC
26 NC Test pin (Can’t connect to GND)
27 NC NC
28 VCC Power supply input voltage(5.0 V)
29 VCC Power supply input voltage(5.0 V)
30 VCC Power supply input voltage(5.0 V)
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Chapter 5. External Equipment Connections
5-1. Antenna Connection
ANT.
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Antenna or Cable Service without a Cable Box Connections.
For optimum picture quality, adjust antenna direction if needed.
Note:
* It is recommended that you'd better use 75Ωcoaxial cable to remove
the disturbance caused by airwave.
* Don't bind antenna cable and electric wire together.
To improve picture quality in a poor signal area,
purchase and install a signal amplier.
If the antenna needs to be split for two TV’s,
install a “2-WaySignal Splitter” in the connections.
If the antenna is not installed properly, contact
your dealer for assistance.
Note:
All cables shown are not included with the TV.

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5-2. VCR Connection
To avoid picture noise (interference), leave an
adequate distance between the VCR and TV.
PC/DVI AUDIO IN
Pb PC IN Y
HDMI IN
Pr
DIGITAL OUT
(COAXIAL)
Connection Option 1:
Set VCR output switch to channel 3 or 4 and
then tune the TV to the same channel number.
Connection Option 2:
A:
Connect the audio and video cables from the
VCR’s output jacks to the TV input jacks, as
shown in the figure. When connecting the TV
to VCR, match the jack colors (Video = yellow,
Audio Left = white, and Audio Right = red).
B:
Insert a video tape into the VCR and press
PLAY on the VCR. (Refer to the VCR owner’s
manual.)
C:
Select the input source with using the SOURCE
button on the remote control, and then press
5
/
6
button to select the source, press the

button to conrm.
5-3. DVD Connection
How to connect:
Connect the DVD video outputs (Y, Pb/Cb, Pr/
Cr) to the COMPONENT (Y, Pb/Cb, Pr/Cr) input
jacks on the TV and connect the DVD audio
outputs to the AUDIO jacks on the TV’ as
shown in the gure.
PC/DVI AUDIO IN
Pb PC IN Y Pr
HDMI IN
DIGITAL OUT
(COAXIAL)
How to use
A:
Turn on the DVD player, insert a DVD.
B:
Use the
SOURCE button on the remote
control,
and then press
5
/
6
button to to select
COMPONENT mode
, press the

button to
conrm.
C:
Press Play button on external equipment for
program play.
D:
Refer to the DVD player’s manual for operating
instructions.
5-4. HDMI or DVI Connection
To watch digitally broadcast programs, purchase
and connect a digital set-top box.
How to connect:
Use the TV’s COMPONENT (Y, Pb/Cb, Pr/
Cr) INPUT jacks, VGA or HDMI port for video
connections, depending on your set-top
box connections available. Then, make the
corresponding audio connections.