Haier L39B2180a User manual

SERVICE MANUAL
LCD TV
Model No. L39B2180a
Chassis
MST318
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.
Haier Group
©2011 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
WARNING

1-1. Table of Contents
1. General Information...........................................................................
1-1. Table of Contents
1-3. Important Notice
4
Chapter 1: General Information
1
4
1-2. General Guidelines
1-4. How to Read this Service Manual
4
7
....................................................................................
Service Manual
Model No.:
- 01 -
3. Location of Controls and Components...........................................
3-1. Board Location
3-2. Main Board
3-3. Power Board
3-4. LCD Panel
4. Disassemble and Assemble..........................................................
7
88
8
8
11
12
15
20
5. Installation Instructions..…....………………...........………….........21
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42snoitcennoCIMDH2-5
6. Operation Instructions....…....………………...........………….........27
6-1 Front Panel Controls
6-2 Back Panel Controls
6-3 Universal Remote Control
27
27
28
7. Electrical Parts…....………………...........…………......................... 29
7-1. Block Diagram
7-2. Circuit Diagram
29
30
8. TV OPERATION........………….........................................................39
8-1 TV OSD Menu
8-2 Upgrade software
8-3 Factory menu
45
39
46

Service Manual
Model No.:
- 02 -
9. Trouble-shooting………….............................................................. 51
15kcehCelpmiS.1-9
9-2. Main Board Failure Check
9-3. Panel Failure
52
55

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 king 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
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to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,
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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
techniques should be used to help reduce the incidence of component damage caused by
electros static discharge (ESD).
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.
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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
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Service Manual
Model No.:
- 03 -

1-3-6 Safety Check after Repairment
- 04 -
Service Manual
Model No.:
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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;
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".
5. Do not defeat any plug/socket B+ voltage interlocks with which receivers covered by this
service manual might be equipped.
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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).
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Capacitors may result in an explosion hazard.
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.
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

Service Manual
Model No.:
- 05 -
Electrostatically Sensitive (ES) Devices
1-3-7. Ordering Spare Parts
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.
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to damage ES devices.
7. 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: Be sure no power is applied to the chassis or circuit, and observe all other
safety precautions.
3. Use only a grounded-tip soldering iron to solder or unsolder 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.
4. Use only an anti-static type solder removal device. Some solder removal devices not
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6. 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).
8. Minimize bodily motions when handling unpackaged replacement ES devices.
(Otherwise harmless motion such as the brushing together of your clothes fabric or the
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an ES device.)
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 of each product and the
Software Version can be found at the Spare Parts List.
2. Spare Part No. and Description
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- 06 -
Service Manual
Model No.:
1-3-8. Photo used in this manual
The illustration and photos used in this Manual may not base on the final design of
products, which may differ from your products in some way.
1-4. How to Read this Service Manual
Using Icons:
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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/
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Service Manual
Model No.:
- 07 -
Model
Screen Size 39inch
Aspect Ratio 16:9
Resolution 1920x1080
Response Time (ms) 8 (GRAYTO
GRAY)
Angel ofView176o
Color Display16777216
No. ofPreset Channels 200
OSD LanguageEng/Fra/Span
Color SystemPAL
Audio SystemBG/DK/I
Audio Output Power
(Built-in) (W) 10W×2
Audio Output Power
(outer) (W) No
Total Power Input (W) 150W
Voltage Range (V)AC100V-240V
Power Frequency (Hz) 50~60Hz
Net Weight (KG) 12.4
Gross Weig
ht (KG) 15.6
Net Dimension (MM)
Packaged Dimension
(MM) 1045*210*735
L39B2180
941*250*655

- 08 -
Service Manual
Model No.:
3. Location of Controls and Components
3-1 Board Location
No. Part Number Description
ABoard
B Board
3-2 Main Board
Main board
Power board
TB300713400M
0113050462
B
J8:
IR&KEY
J5:
POWER IN
J6:
LVDS
J4˖PANEL
POWER
J7:
USB
J1:
HDCP
J2:
INVERTER J3:AMP _POWER
J12:DVD
CONTROL&POWER
J16:
HDMI
J15: DVD
SIGNALIN
J14:
SVIDEO IN
J9˖
AUDIO IN
J17˖
PANEL GPIO
J13:
SPEAKER

Service Manual
Model No.:
- 09 -
3-2-1 Function Description:
Main Board
Process signalwhich incept fromexterior equipment then translate into signalthatpanel
can display.
Main board connector
Power connectors (J2, J5)
Notes:
J2-Pin 4: Backlight on/off:
The systemcan turn on or turn off the backlight ofTFT LED Panel through the power
supply unit path.
J5-Pin 9: Systempower on / standby
Systemboard will use this pin to control systempower.
J2-Pin 3: Control the luminance ofbacklight
The systemcangenerate the PWN signal to control the strength ofTFT LED Panel’s
backlight through this connector
J2J5

- 10 -
Service Manual
Model No.:
Keypadand remote connector (J8)
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Signal name
GND
K7
K6
K5
K4
K3
K2
K1
K0
GND
IR
LED_G
LED_R
+5V
Description
Ground
Power key
NC
CH- key
CH+ key
Vol- key
Vol+ key
Meny key
TV/AV key
Ground
IR Receive
Green Indicator
Red Indicator
+5VDC Power Supply

3-3. Power Board
Service Manual
Model No.:
- 11 -
Speaker connector J13
Pin number Signal name Description
Audio Right+channel Output
R+
1
2
3
Audio Left+channel Output
L+
4
L-
R-
Audio Left- channel Output
Audio Right- channel Output
Power supply connectors AC INPUT
Location: CON1
Connector type:3.96mm-3Pin
Pin assignments:
Table.
Pin No Symbol Description
1L
AC INPUT LINE
3N
AC INPUT NUTURE
DC Output:
Location: CON4
Connector type:PH-5A 5P/2.0mm or equivalent
Pin assignments:
Table. (2.0mm-4pin)
Pin No Symbol Description
1ADJ Brightness
2SW Inverter On/off Control
3GND Ground
4GND Ground
Location: CON3
Connector type:XH-4A 4P/2.5mm or equivalent
Pin-CON3 Connection And Function TYPE : 2.54MM*4PIN
NO. Pin Connection Function
1 +24V +24V OUTPUT
2 +24V +24V OUTPUT
3GND Ground
4GND Ground
Location: CON2
Connector type:JST-B13PH-K-S or equivalent
Pin assignments:
Table. (2.5mm -13Pin)
Pin No Symbol Description
1,2,9,10,11 GND Ground
3,4,7,8 +5V +5V Output
5 STB SMPS On/off Control(ON=HIGH)
6 +5VSB Standby Output
12,13 +12V +12V Output

3-4. LED Panel
- 12 -
Service Manual
Model No.:
OPEN CELL LABEL
The barcode nameplate is pasted on each open cell as illustration for CMI internal control.
V390HJ1-P01
XXXXXXXXXXXXXX
V390HJ1-P01 Rev.
XXXXXXXXXXXXXX

Service Manual
Model No.:
- 13-
3-5 Interface Connect ions
Description
Ground
LVDSDataFormatSelection 2
First pixel Odd LVDSSignal-
First pixel Odd LVDSSignal+
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Symbol
GND
NC
SELLVDS
NC
NC
GND
CH1[0]-
No
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
59
50
51
-
Symbol
-
Descrip tion
NC
NC
NC
NC
DC power supply
NC
CH1[0]+
CH1[1]-
CH1[1]+
CH1[2]-
CH1[2]+
GND
CH1CLK-
CH1CLK+
CH1[3]-
CH1[3]+
GND
CH1[4]-
CH1[4]+
Ground
First pixel Odd LVDSClock-
First pixel Odd LVDSClock+
First pixel Odd LVDSSignal-
First pixel Odd LVDSSignal+
First pixel Odd LVDSSignal-
First pixel Odd LVDSSignal+
Ground
First pixel Odd LVDSSignal-
First pixel Odd LVDSSignal+
First pixel Odd LVDSSignal-
First pixel Odd LVDSSignal+
Ground
NC
NC
Second pixel Odd LVDSSignal-
Second pixel Odd LVDSSignal+
CH2[0]-
CH2[0]+
CH2[1]-
CH2[1]+
CH2[2]-
CH2[2]+
GND
CH2CLK-
CH2CLK+
CH2[3]-
CH2[3]+
GND
CH2[4]-
CH2[4]+
Ground
Ground
Second pixel Odd LVDSSignal-
Second pixel Odd LVDSSignal+
Second pixel Odd LVDSSignal-
Second pixel Odd LVDSSignal+
Second pixel Odd LVDSSignal-
Second pixel Odd LVDSSignal+
Second pixel Odd LVDSSignal-
Second pixel Odd LVDSSignal+
Second pixel Odd LVDSClock-
Second pixel Odd LVDSClock+
1
1
1
1
1
1
1
1
1
1
1
1
NC
NC
GND
GND
GND
NC
1
VCC
VCC
VCC
VCC
DC power supply
DC power supply
DC power supply
CNF1 Connector Pin Assignment: (FI-RE51S-HF(JAE) or equivalent)

4. Disassemble and assemble
Service Manual
Model No.:
- 15 -
Front
Back
4-1, Remove the6 screws as below picture

Service Manual
Model No.:
- 16 -
4-2, Remove the 5 screws on the back cabinet
4-3, Remove the 2screws on the backcabinet.
4-4, Remove the 14 screwsas belowpicture

Service Manual
Model No.:
- 17 -
4-5, Remove the 11 screws on the fixingboard
4-6,Remove the 4 screws ofthe speakers
4-7,Remove the 2screws as belowpicture
4-8,Remove the 4 screws as belowpicture

Service Manual
Model No.:
- 18-
-9, Remove the 2screws as belowpicture
4-10,Remove the 4 screwsas belowpicture

Service Manual
Model No.:
- 19 -
4-10, Remove the 6screws fixingthe side iron stick.

4-9,Remove the 1 screws as belowpicture




Service Manual
Model No.:
- 20 -
4-11