ORION LED1961 Schematic
ORION
SERVICE MANUAL
LED1961
1 TV CONNECTION INSTRUCTION.
HKHK--T.MSTV59V08XT.MSTV59V08X
Trouble shooting flow chartTrouble shooting flow chart
——Power ChartPower Chart
——Power Units Problem Solving Power Units Problem Solving
——Display Units Problem SolvingDisplay Units Problem Solving
——Audio Units Problem SolvingAudio Units Problem Solving
——Functional Units Problem SolvingFunctional Units Problem Solving
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HKHK--T.MSTV59V08X T.MSTV59V08X Power ChartPower Chart
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2.2.1 Power Units Problem Solving1 Power Units Problem Solving(Mainboard can not boot.)(Mainboard can not boot.)
In stand-by condition,
Check main board U11 3pinWhether there is 5V?
Checkmain board
U11powerSupply
Net
N
N
Check U10 Power
Supply Net
Y
Check main board U10 3pin
Have 1.2V ?
Y
Y
Check main board U4
2pinhave 3.3V ?
Y
Normal
boot
After power on,
Check U3 2pinhave 1.8V，
Test U87pin have 12V ， Test L14
have 3.3V?
Check U4Power
Supply Net
YN
N
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Check the availability of short-
OK
circuit power supply
2.2 Display Unit (black screen)
Change the LCD,
check if it is ok
Flickering or
Black screen（Back light on）
Check the connection of Driver
Board Cable connect well
N
N
Change
LCD
Y
Check the network output,
CN3cable socket
Works normal
Y
Check the software
match able
Y
Check U5
Power supply and clock
circuit chip LVDS output
pin is short circuit,
or open-circuit ？
N
Re-update the software
Check LCD power
VCC-Panel is OK ?
CN4voltage is ok?
Q4output voltage
is ok ?
N
Change the circuit
Change driver
board cable
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2.3 Display Unit (black screen)
Black screen
Main board CN31，2pin
Have or not 12V？
Check the Inverter power supply
CN3 4pin output voltage is over 3.3V
N Y
Maintenance power
Y
Check power supply circuit
Inverter broke or
bad wire connection
N
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2.4 Audio Unit (no sound)
No sound
If Any audio signal input or
amplifier power supply normal
N
Check the Volume,
Y
MUTE settings
YN
CN8no signal output
Check
External audio
equipment
Amplifier power
supply circuit
Reset
Y
Check
external
Speaker
Check amplifier
power supply circuit
Power supply
normal change U9
N
Maintains
U5Peripheral
circuits，change
U5
N
U8（YD1517）1/9
Pin have signal input
NY
Check U5
havetheaudio signal output
Y
Check U5& U8
Connect part
network
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