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MHC-V71/V71D
28
MOTHERBOARD Board Mount
Amplifier Diagnosis Flow (1/3)
1.
“PROTECT3” is displayed a
fter turning the power on
Y
es
N
o
N
o
Y
es
Y
es
“P
R
O
TE
C
T3
” i
s
di
sp
la
ye
d
on
th
e
sc
re
en
d
is
pl
ay
p
an
el
a
fte
r t
ur
ni
ng
th
e
po
w
er
o
n.
C
he
ck
th
at
IC
20
02
p
in
2
7,
3
2,
3
5
an
d
39
is
s
ho
rt
to
G
N
D
.
C
he
ck
a
nd
re
pl
ac
e t
he
s
pe
ak
er
.
E
xc
ha
ng
e
IC
20
02
.
M
O
TH
ER
BO
AR
D
b
oa
rd
d
am
ag
ed
. E
xc
ha
ng
e
co
m
pl
et
e
M
O
TH
ER
BO
AR
D
bo
ar
d.
“P
R
O
TE
C
T3
” i
s
no
t d
is
pl
ay
ed
, w
he
n
re
m
ov
in
g
th
e
sp
ea
ke
r c
on
ne
ct
or
(C
N
20
21
) a
nd
tu
rn
in
g t
he
p
ow
er
o
n.
SYS SET
2018/05/30 01:52:46 (GMT+09:00)