Haier MT5311, Руководство пользователя

Страница: 83 / 92

No Sound
6. Audio Trouble 6. Audio Trouble
˄ ˄
no sound no sound
˅ ˅
Check if there is audio signal input
N
Y
Check if the set of
volume Mute is normal
Y
N
volume, Mute is normal
Check signal output of C0N1
Y
N
Check if power supply of
pin No.2,3,34,35of U38 is 24V
Check if pin No 25 of U38 is 0V
N Y
Check if pin No.25 of U38 is 0V
Check the signal input
on pin,No.22 of U38
Y
N
Y
N
Check the
power
Control
Y
N
Check the signal output on
pin No.1,4,39,36of U38.
Check the signal output on
pin No.H24of UM1
Y
N
Check the signal input
Y
N
Check external
audio equipment
circuit of
amplifier
Check
Check pin No AA8
Check the network from
UM1(pin No.H24)
to U38 (pin No 22)
g p
of UM1 audio
toAD25/AD22PIN
Change
UM1
Check the
circuit from
Y
N
Reset it
External
speaker
Check pin No.AA8
of UM1/5311
and circuit of R1830
Change
U38
Check the circuit
from U38 and to
C0N2
to U38 (pin No.22)
UM1
circuit from
audio input
terminal to
UM1
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