28
MHC-V42D
MOTHERBOARD Board Mount
Amplifier Diagnosis Flow (2/3)
2. The sound is not outputted
Ch
ec
k t
ha
t th
e s
ign
al
is
inp
ut
to
IC
20
01
pi
n 2
4 a
nd
25
.
Ch
ec
k t
ha
t th
e P
W
M
si
gn
al
is
ou
tpu
tte
d f
ro
m
IC
20
01
pi
n 3
9,
41
, 4
8 a
nd
49
.
Check that the signal is outputted from IC2002
Th
e
so
un
d i
s n
ot
ou
tp
utt
ed.
MO
TH
ER
BO
AR
D
boar
d damaged.
Exchange the MOTHERBOARD mounted pc boa
rd.
MO
TH
ER
BO
AR
D
boar
d damaged. E
xchange
the MOTHERBOARD
mounted pc boar
d.
Exchange
IC
2001.
Exchange
IC
2002.
pin 39 and 40 (Subwoofer -) pin 35 (Sub) pin 27 and 28 (Right Channel Speaker) pin 32 (Left Channel Speaker)
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
SYS SET
2019/03/05 00:47:46 (GMT+09:00)