27
MHC-V42D
MOTHERBOARD Board Mount
Amplifier Diagnosis Flow (1/3)
1. “PROTECT3” is displayed after turning the power on
“P
RO
TE
CT
3”
is
d
isp
lay
ed
o
n
th
e s
cr
ee
n
dis
pla
y p
an
el
aft
er
tu
rn
ing
th
e p
ow
er
o
n.
“P
RO
TE
CT
3”
is
n
ot
dis
pla
ye
d,
w
he
n
re
m
ov
ing
th
e s
pe
ak
er
co
nn
ec
to
r (
CN
20
21
) a
nd
tu
rn
ing
th
e
po
we
r o
n.
Ch
ec
k t
ha
t IC
20
02
pi
n 2
7,
32
, 3
5 a
nd
39
is
sh
or
t to
G
ND
.
Ch
ec
k a
nd
re
pla
ce
th
e s
pe
ak
er
.
Ex
ch
an
ge
IC
20
02
.
MO
TH
ER
BO
AR
D
bo
ar
d
da
m
ag
ed
. E
xc
ha
ng
e
th
e
M
OT
HE
RB
OA
RD
m
ou
nt
ed
p
c b
oa
rd
.
Ye
s
No
No
Ye
s
Ye
s
SYS SET
2019/03/05 00:47:46 (GMT+09:00)