Akai LTA-32N576HCP Schematic
LTA32N576HCP
CV068M3_V2.2 repair guide
CV068M3_V2.2 repair guide
of common defect
of common defect
—
Power supply
—
Power supply
—
Display
—
Display
—
Sound
—
Sound
—
Source
—
Source
No power ?
No power ?
5V from 2nd pin of J6？
N
Check power outside
Check AC
N
Connect to good
power supply
U5==3.3V?， U6==1.2V?，U7==3.3V？
Power on，
3&4 pin of J6 == 5V?，
10&11 pin of J6 == 12V？
N
Check relative circuit
Y
Check U9
Y
Y
OK
N
Repair LDO(U5、U6、U7)
and relative circuit
Snow on display ?
Y N
LCD panel OK ?
NY
J6 work OK ?
Snow or black
with back light on
LVDS is OK ?
Change LCD
Y
Check U9 Change this circuit
N
Repair LVDS
Black back light
pin4 of J5 = 5V?
Y
Inverter supply OK ?
NY
Check power supply Check Inverter & its line
Back light black
N
Check pin110 of U9 and circuit of Q4
No sound
Audio signal input ?
No sound
N
N
Y
Volume?、MUTE?
Y
Signal J3/J4 ?
Y
NY
Check sound signal input pin of U9
Y
N
U4（TPA3008D2）2/6
Signal input?
N
Power supply
of
sound device
reset
Check
speakers
Check sound
amplifier
check circuit
diagram between
U9 and U4
Check signal input of U9
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