Orion LCD2649 Manual de usuario

ORION

SERVICE MANUAL

LCD2649/3249/4050

1. TV CONNECTION INSTRUCTION

KEY & IR BOARD

LVDS

INVERTER

SPEAK

Amlifier

Power supply

Built in

Power Supply

MAIN BOARD

2.CV181H-X-40C

CV181H-X-40C

Common problems solution

—

—Power Chart

Power Chart

—

—Power Units Problem Solving

Power Units Problem Solving

—

—Display Units Problem Solving

Display Units Problem Solving

—

—Audio Units Problem Solving

Audio Units Problem Solving

—

—Functional Units Problem Solving

Functional Units Problem Solving

In stand-by condition,

Check TP3 have or not 5V?

Check main board TP5 have 3.3V ?

Normal boot

Check the availability of short-circuit

power supply and motherboard

Check power chip (U2) work?

Check power chip LDO (U1,U7,U8,U10)

work？

After power on,

Check point TP4 have 12V ，Test

point TP1 have 1.26V， Test point

TP12 have 3.3V , Test point TP9

have 2.5V, Test point TP8 have

1.8V ?

Check U1 Power

Supply Net

Check external

power

Picture 1; Power Units Problem Solving

(

(Mainboard

Mainboard can not boot.)

can not boot.)

Flickering or

Black screen（Back light on）

Check the connection of Driver

Board Cable connect well

Change the LCD,

check if it is ok

Change driver

board cable

Change

LCD

Check the network output,

J6 cable socket

Works normal

Check U9 (MST6M181VG)

Power supply and clock

circuit chip LVDS output

pin is short circuit,

or open-circuit ？

Change the circuit

Check LCD power

VCC-Panel is OK ?

J5 voltage is ok?

Q11 output voltage

is ok ?

Check the software

match able

Re-update the software

Picture.2 Display Unit

(black screen)

Black screen

Main board TP4

Have or not 12V？

Check the Inverter power supply

1pin of J7 or 4 pin of J3 output voltage is over 3.3V

Check power supply circuit

Maintenance power Inverter broke or

bad wire connection

Picture 3 Display Unit (black screen)

No sound

If Any audio signal input or

amplifier power supply normal

Check

External audio

equipment

Amplifier power

supply circuit

U3（TPA3110L）3/12

Pin have signal input

Check the Volume,

MUTE settings

Reset

J11 If any signal output

Check

external

Speaker

Check amplifier

power supply circuit

Power supply

normal change U3

Check U9

audio input pin

has the signal output

Maintains U9

Peripheral

circuits，

change U9

Check U3 & U9

Connect part

network

Picture 4 Audio Unit (no sound)

Figure.5 Function Unit

(ATV broke down)

TV no searching

/no image

Check External RF

signal input

Check

external

equipment

Check the TP7 have 5V ,

or Check the TP11 have 3.3V ?

Check

power

supply

circuit of

U5 or U4

Check Tuner No. 6,7pin of U13

Have I2C data

Check pull-up

voltage of I2C

network

Check No.9,10 pin of U13 have IF signal

Check external circuit

of U13 is OK?

Repair

its outer

circuit

Check U13&

U9(MST6M181VG)

connect network Change

Tuner

TV no sound only picture

Check the sound of PC& AV

See “NO SOUND”

repair guide Change

U9(MST6M181VG)

Picture 6 Function Unit （ATV with the

image but no sound)

Image not

In the middle Color

cast Image

shakes No signal

Carry out

auto-adjust

operation

U9(MST6M181VG)

R.G.B input signal

works well

Reset the

system settings

VS,HS signal

Stable and well

Check VS.HS

Circuit

OSD settings,

Or input mode

not correct,

Reset it

Check VS.HS

Circuit

Check VGA

circuit

connection

Check

VGA circuit

connection

Check VGA

input circuit

Picture 7 Function Unit

(PC)

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