Orion LED1546 User manual

LED1546 LED1946 LED2247 LED2444

LVDS
(1)
IIC

LVDS
(2)
POWER &
IIC

HK
HK- -T.M182VGV01X T.M182VGV01X
Trouble shooting flow chart
Trouble shooting flow chart
—
—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

HK
HK- -T.M182VGV01X T.M182VGV01X Power Chart Power Chart

In stand-by condition,
Check CN3 1pin Whether there is 5V?
Check main board CN10 1pin have 3.3V ?
Normal boot
Check the availability of short-
circuit power supply and
motherboard
After power on,
Check point CN3 1pin have 5V，
Test L5 have 12V ， Test L3 have
1.26V， Test U5 have 1.8V , Test
L100 have 2.5V ?
YN
OK
Check U1 Power
Supply Net
NY
Check external
power
NY
2.
2.1 Power Units Problem Solving 1 Power Units Problem Solving (Mainboard can not boot.) (Mainboard 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
Y
N
Change
LCD
N
Y
Check the network output,
CN2 cable socket
Works normal
Y
Check U101(MST6M182)
Power supply and clock
circuit chip LVDS output
pin is short circuit,
or open-circuit ？
Change the circuit
N
Check LCD power
VCC-Panel is OK ?
CN9 voltage is ok?
Q4 output voltage
is ok ?
Check the software
match able
Re-update the software
N
2.2 Display Unit (black screen)

Black screen
Main board CN2 1，2 pin
Have or not 12V？
Check the Inverter power supply
CN2 4pin output voltage is over 3.3V
Check power supply circuit
N
NY
Y
Maintenance power Inverter broke or
bad wire connection
2.3 Display Unit (black screen)

No sound
If Any audio signal input or
amplifier power supply normal
Check
External audio
equipment
Amplifier power
supply circuit
U9（YD1517）1/9
Pin have signal input
NY
Y
N
Check the Volume,
MUTE settings
Reset
CN7 no signal output
YN
Check
external
Speaker
Check amplifier
power supply circuit
Power supply
normal change U9
Check U101
have the audio signal output
N
Y
NY
Maintains U101
Peripheral
circuits，change
U101
Check U101 & U9
Connect part
network
2.4 Audio Unit (no sound)

TV no searching
/no image
Check External RF
signal input
N
Check
external
RF
equipment
Y
Check the Turner
NO.8 pin of T1
have 33V
Check
circuit of
U1
Y
N
Check Tuner No. 6,7 pin of T1
have I2C data
Check pull-up
voltage of I2C
network is
normal
N
Y
Check No.9,10 pin of T1
have IF signal
NY
Check external circuit
of T1 is OK?
N
Y
Repair
its
outer
circuit
Check T1&
U101(MST6M182)
connect network
Change
Tuner
2.5 Function Unit (ATV broke down)
Check the Turner
NO.3 pin of T1
have 5V
Y
Check R811 have 12V
&R812 have PWM
N
Change Tuner
Check U101 PWM out
signal circuit& Q2
N
Y

TV no sound only picture
Check the sound of PC& AV
NY
See “NO SOUND”
repair guide Change
U101(MST6M182)
2.6 Function Unit （ATV with the image but no sound)

PC
Image not
In the middle Color
cast Image
shakes
No signal
Carry out
auto-adjust
operation
U101(MST6M182)
R.G.B input signal
works well
Reset the
system settings
YN
VS,HS signal
Stable and well
Check VS.HS
Circuit
OSD settings,
Or input mode
not correct,
Reset it
Check VS.HS
Circuit
YN
Check VGA
circuit
connection
Check
U10 circuit
connection
Check VGA
input circuit
2.7 Function Unit (PC)

RGB、SCART
SCART
Miss color,
color cast
All no signal
The system is incorrect
re-set settings Check SCART R.G.B
Input network
Check
U101
（MST6M182 ）
Power supply
U101(MST6M182)R.G.B
Input signal is normal
YN
SCART socket
contact is ok
2.8 Function (SCART,VGA)
RGB no signal
Check U10
peripheral circuit
Change U10

HDMI
No image Image,
no sound
Check the connect network
R716,R717,R718,R719,
R720,R721,R722,R723 to
U8(MST6M181)
Check HDMI
and the input
network
Check HDMI and
input network
Check hdmi signal
HPD & I2C Check If the sound
is ok in PC
YN
See the repairs
guide “No Sound
Solution”
Y
Check HDMI
connection
N
2.9 Function Unit （HDMI）

YPBPR
YPBPR
Color cast No signal
Check U14 peripheral circuit Check U101 peripheral circuit
and crystal circuit.
If have a dvd
Check U14
peripheral circuit
2.10 Function Unit (YPBPR)
Check video circuit of U14 and
U101(MST6M182) connect network

3.KEY BOARD AND REMOTE BOARD
3.1 KEY BOARD
View of copper SIDE(top/boom)
3.2 REMOTE BOARD
15.6”
15.6”
22”
22”
24”
24”
View of copper SIDE(top/boom)

4.THE CIRCUIT
OF HK-T.M182VGV01X

INDEX:
PART 1：Brief Introduction
◆Schematic Diagram Block
◆Printed Circuit
PART 2:
Exploded view
PART 3:
Detailed Circuit
PART 4:
Components List
PART5:
Debug Instruction

Schematic Diagram
Part1:
U101
6M182
U9
Amplifier
SPEAKER
HDMI VGAINUSB SCART
HEADPHONE
YPBPRIN AVINTUNER
DC12V
SWITCH
12V
3.3V 2.5V 1.8V
5V
1.25V
SWITCH
AUDIO
TUNER+5V
IF
PANELPOWER
I2C

Printed Circuit
TV Main Board (Top View)
TV Main Board
（Bottom view）
PART 2:
Exploded view