Content 1 Component 2 repair instruction 3 How to define problem 4 How to repair 5 How to...

Content

1 Component 2 repair instruction3 How to define problem4 How to repair5 How to disassemble6 PC part7 Button and Ports

1.1\Component

LED driver board

Power board

182VG2.0 mother board

PC power on button and touch pinboard

PC

touch screen external

connection pinboard

60HZLEDscreen

1.2\ 6M48V2.0 Port

Power port Back light port

Button port

Remote control port

LVDS port Audio port

USB HDMI1 HDMI2 VGAAudio input

1.3\182VG2.0 Port

Power port

Audio output

USB HDMI x 3 VGA 音频输入

Button portLVDS portBack light

control

Remote control port

2 repair instruction

Precaution• Make sure panel is shut down and power is cut.• Non-professional can not do repair• This manual is suit to panel model (black)

Tools• Screwdriver• Multimeter• PC/laptop • tweezers

2 repair instruction

Part can be replaced

TV• TV power board

• TV mother board

• Speakers

• LVDS cable

• Cables

• Button board

• Remote control receiver board

• Touch screen pinboard

• LED driver board

• Touch screen

PC• Memory card

• Hard disk

• Mother board

• CPU

• Fan

• PC power

• Cables

• Touch/button pinboard

3/How to define problem

Problem1 ： panel can not power on 1) Check if power indicator is RED after power connects and power button

is on.2) When indicator is RED, use remote control to power on panel, if can

power on, the power on/off button is fault. If remote control can not power on panel, to update TV mother board software. If update fail, to replace TV mother board.

3) When power indicator is not light take off back cover of panel Check electric of power switch button and power board, use multimeter to

test if power output is good under 5V/12V/24V. If there is no power, replace power board and check if panel works4) When power indicator is not light and there is power from power board. to check the connection between power board and TV mother board to check TV mother board power port, if there is power If there is power from TV mother board power port, to replace TV mother

board


Connect power and check power indicator is light

Power on? Test

End

Replace power switch or power

board

Power on?

Check connections between power board and

TV mother board

Indicator is RED or Blue, but screen can not light

on

Update TV mother board by software

Replace TV mother board

Contact with supplier


Problem2: Screen Blurred

1) Adjust TV software specs in factory mode (10 BIT or TIB)

2) If fail, to update TV mother board software

3) If not work, disassemble panel and check LVDS cable connection.

4) If LVDS cable connects good, to replace TV mother board

5) If screen still blurred after above steps, check if the screen is 120HZ.

If so, replace pinboard of 120HZ screen or update software.


Adjust software specs

Display ok

test

Update TV mother board software


Check LVDS connection or replace

Display okreplace pin board of

120HZ screen or update software

end Contact supplier


Problem3: No signal

1) Check PC power indicator is YELLOW

2) If so, check resource setting is correct

3) If still no signal, check cable between PC and TV

4) Connect with external PC, if there is signal, PC has problem

5) When PC connects with TV by HDMI, replace it by VGA (to judge if port is wrong or connection not good)

6) If still no signal, take out the PC box and check memory card loose or dusty.

7) Replace memory card and check, if fail, replace PC mother board.


PC power indicator is YELLOW

Set signal resource

Signal ok

test

Check power connection

Check PC if fan works

Replace memory card or clean it

Replace PC mother board

Connect with other PC, no

signal


signal port

Replace P

C pow

er

Signal ok

endCheck PC button

and flat cable

Replace CPU


Problem 4: screen can not display 1)When power on, after LOGO shows screen can not displayTV program damages, to update TV board. If not work, replace TV boardIf still not display, take off panel cover and check back light cable connection

2)Screen can not display when power on check power indicator is light If power indicator do not light, it is problem 1


Screen can not display

Display is ok

Replace TV board

Check connection of

back light cable

Organize back light cable and

LVDS

Update TV software

Display is ok

test end

Contact supplier


Problem 5 ： NO sound

1) Check if there is audio output from PC

2) If there is audio output from PC, check connection between PC and TV

3) If connection good, take off back cover of panel, test speaker by multimeter and check connections. Replace speaker when it is faulty.

4) If still on sound after above steps. To replace TV mother board or replace amplifier IC(TDA7491LP) on TV mother board.


Check audio output from PC

Check speakersCheck

connections

Check sound driver

Check sound setting


Check sound

Replace speakers

Replace PC mother board

Check audio output

end

test

4/Touch part repair

1. Touch part structure

PCB with USB cable

Flat cable Flat cable

flat cable

These PCB marked different number, there are different numbers on different size panel

Black PCB is receiver, white PCB is sender.MCU is sender No.1. the position must be

correct when repair

4/Touch part repair

2. How to define problem

Problem 1: can not touch

1) Connect panel with external PC, test by Checktool

If Checktool can not work, take off back cover and check USB port connection. If connection is good, take off touch screen and check touch port. Firstly, to see USB touch cable welding is good or not.

2) When welding is good, replace a good MCU and test.

3) If still not work after MCU replaced, to check PCB one by one.

4/Touch part repair

Connect panel with external PC

Check flat cable, USB cable welding is good

Replace MCU

Touch is good

end

Check PCB one by one

Replace faulty PCB

Check connection between Pinboard

and PC

Replace USB port on PC board

Replace cable or pinboard

Touch is good

Contact supplier

4/Touch part repair

Problem 2: Touch is not smooth

1) Connect panel with external PC, check infrared part by Checktool. ( see picture next page)

2) For example, if tube 1-14 on No.2 PCB is faulty in picture next page Find No.2 PCB from receiver or sender by multimeter, and then replace. Or directly replace No. 2 PCB from receiver or sender, and check AD by

checktool.

4/Touch part repair

Fault is No.2 PCB

Infrared tube number

AD is 0, wrong

number, so it is red

Wrong AD

4/Touch part repair

Checktool interface in English

5/How to disassemble

Take off all external connection cables and wall mount bracket

Take off back cover to check board, connections

If there is problem from touch part

Disconnect USB cable, button flat cable, control flat cable,etc

Take out fix part around four sides, see picture next pages

Take screen and glass to avoid dust

Replace touch part


The part fix screen and glass


Take out the screws

Take out all screws around frame and take off screen and glass , put them

together carefully to safe place


Touch frameConnect this part with PC, use Checktool to test and replace PCB

6/PC part

PC power

Hard disk

Touch button connect board

memory

PC mother board

fan

7/Button and Ports

1.PC power on

2.TV power on

3. source

4.menu

Volume adjustChannel adjust

USB Touch

HDMI port

Audio input

Power switch

VGA port

TV power light PC power light

Power on,Light is red, light is blue when press TV button

later

Light is yellow when

press PC button

Content 1 Component 2 repair instruction 3 How to define problem 4 How to repair 5 How to...

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