AWA BBHTN180, MSD306 Schematic

SERVICE MANUAL

LCD TV

Model No. BBHTN180

MSD306

Chassis

WARNING

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.

Service Manual

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Chapter 1: General Information

1-1. Table of Contents

1. General Information...........................................................................

1-1. Table of Contents

1-2. General Guidelines 1-3. Important Notice 1-4. How to Read this Service Manual

2. Speciﬁcations....................................................................................

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..........................................................

4-1 Remove the Pedestal

4-2 Remove the Terminal Bracket

4-3 Remove the Power Module 16

4-4 Remove the Main Board 16

1 3 3 6

4-5 Remove the Speaker 17

4-6 Remove the Remote Control Board

5. Installation Instructions..…....………………...........………….........

5-1 External Equipment Connections

5-2 HDMI Connections

6. Operation Instructions....

6-1 Front Panel Controls

6-2 Back Panel Controls

6-3 Universal Remote Control

…....………………...........………….........

7. Electrical Parts…....………………...........………….........................

7-1. Block Diagram

7-2. Circuit Diagram

7-3. Wiring Connection Diagram

8. Measurements and Adjustments........…………............................

8-1. How to enter into the factory model

8-2. How to update software

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9. Trouble-shooting…………..............................................................

9-1. Simple Check 44

9-2. Main Board Failure Check

9-3. Panel Failure

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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

To prevent damage which might result in electric shock or re, do not expose this TV set

to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,

and objects 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 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.

1-3-5. Use the genewing parts (specied 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 identied by mark have special characteristics important for safety.

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1-3-6 Safety Check after Repairment

Con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; 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 ammable mixture. Unless speci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.

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 xtures specied in this service manual.

CAUTION: Do not connect the test xture 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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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 semiconductorequipped 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.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static type solder removal device. Some solder removal devices not

classied as "anti-static" can generate electrical charges sufcient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufcient

to damage ES devices.

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).

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.

8. 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 oor can generate static electricity sufcient 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 of each product and the Software Version can be found at the Spare Parts List.

2. Spare Part No. and Description

You can nd them in the Spare Parts List

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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:

Icons are used to attract the attention of the reader to specic 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.

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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 nd additional information on a specic topic.

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2. Speciﬁcations

Model

Screen Size 18.5 inch

Aspect Ratio 16:9

Resolution 1366x768

Response Time (ms)

Angel of View

Color Display 170 (H)/160 (V)

No. of Preset Channels 400

OSD Language English

Color System PAL/SECAM

Audio System DK, BG, I, M, L, L'

Audio Output Power

(Built-in) (W)

Audio Output Power

(outer) (W)

BBHTN180

5 (GRAY TO

GRAY)

176

3W×2

Total Power Input (W) 30W

Voltage Range (V)

Power Frequency (Hz)

Net Weight (KG)

Gross Weight (KG)

Net Dimension (MM)

Packaged Dimension

(MM)

AC100V-240V

50~60Hz

3.6

3.8

460*140*346

541*171*408

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3. Location of Controls and Components

3-1 Board Location

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B Board

A Board

No. Description

A Board Main Board

B Board

Power Board

3-2 Main Board

515C3206M60

514C1901M03

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3-2-1 Function Description:

Main Board

Process signal which incept from exterior equipment then translate into signal that panel can display.

3-2-2 Connector denition

Main board connector

Power connectors (J25, J2)

J25

Pin number Signal name Pin number Signal name 1 +5V 1 GND 2 2 GND 3 3 +5V 4 4 +5V

BL-ON

BL-ADJUST

+5V

5 GND 5 POWER ON/OFF

6 +5VSTB 7 +5V 8 +5V 9 GND 10 GND 11 GND 12 +12V 13 +12V

Notes:

J25-Pin 2: Backlight on/off: The system can turn on or turn off the backlight of TFT LCD Panel through the power supply unit path. J2-Pin 5: System power on / standby System board will use this pin to control system power. J25 T-Pin 3: Control the luminance of backlight The system can generate the PWN signal to control the strength of TFT LCD Panel’s backlight through this connector

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remote connector (J21)

Pin number Signal name Description 1 LED_R LAMP RED 2 3 4 IR REMOTE CONTROL 5 GND GND 6 5V POWER FOR REMOTE

Keypad and connector (J22)

Pin number Signal name Description 1 KEY1 2 KEY0 3 GND

LED_G LAMP GREEN

Speaker connectorJ26

Pin number 1 2 RSPK3 4

Signal name Description RSPK+ RSPK+

LSPK- LSPKLSPK+ LSPK+

RSPK-

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3-3. Power Board

3-3-1 Function Description:

Supply power for Main board, Panel.

3-3-2Connectorde

ﬁ

nition

CON5

Pin number Signal name 1 2 3 4 5 6

7 8 9 10

POEWR ON/OFF

12V 12V

GND

5V STB

5V GND

GND 11 12

ON-PBACK

BK ON/OFF

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3-4. LCD Panel

Service Manual

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MTC185TVM-C07H(CPT:CLAA185WA04 V4)

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3-4-1 Function Description: Display the signal.

3-4-2 Connector de

CN1(Data Signal and Power Supply)

PIN NO. SYMOBL FUNCTION

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 27 28 29 30

NC NC NC NC NC NC GND Power ground RXIN0- Negative LVDS differential data input(0) RXIN0+ Positive LVDS differential data input(0) GND Power ground RXIN1- Negative LVDS differential data input(1) RXIN1+ Positive LVDS differential data input(1) GND Power ground RXIN2- Negative LVDS differential data input(2) RXIN2+ Positive LVDS differential data input(2) GND Power ground RXCLKIN- Negative LVDS differential clock input(clock) RXCLKIN+ Positive LVDS differential clock input(clock) GND Power ground RXIN3- Negative LVDS differential data input(3) RXIN3+ Positive LVDS differential data input(3) GND Power ground NC NC NC NC NC NC GND Power ground GND Power ground GND Power ground VCC Power supply input voltage(5.0 V) VCC Power supply input voltage(5.0 V) VCC Power supply input voltage(5.0 V) VCC Power supply input voltage(5.0 V) VCC Power supply input voltage(5.0 V)

ﬁ

nition.

1) Keep the NC Pin and don’t connect it to GND or other signals.

2) GND Pin must connect to the ground, don’t let it be a vacant pin.

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4. Disassemble and assemble

4-1 Remove the Pedestal

① Lay down the unit so that rear cover

faces upward

① Remove the three screw from the rear cover indicated with ○

Then remove the pedestal

①

4-2Remove the Back Cover

① Remove the these screw indicated on

gure above by ○

Then remove the back cover from the

①

unit.

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4-3 Remove the power module

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① Remove the four screw indicated on the gure above by ○ ① Then remove the power module

4-4 Remove the Main board

① Remove the two screw indicated on the gure above by ○ ① J2 ① ① Remove the Main board

Disconnected the coupler J20

①

J21

①

J22

①

J25

①

J26

①

J17

①

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4-7 Remove the speaker

Take out the speaker

4-8 Remove the remote control

Remove the screw, take out the remote control board

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5. Installation Instructions

5-1 External Equipment Connections

Accessories

Service Manual

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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.

User GUIDE

Battery

To improve picture quality from an antenna in a poor signal area, install a signal

amplier.

If you need to split the antenna signal to connect two TVs, install a two-way splitter.

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+ 39 hidden pages