Akai LTC-32R5W4HCP, Service Manual

Page: 13 / 39

Getting rid of audio's trouble
audio-part
（
no sound
）
11
MANI BOARD FAULT JUDGMENT
Setting of Volume
、
MUTE is normal
It have the audio signal utput?
No audio
CN32 or CN22supply power normally?
CN20 port have the audio signal?
M
a
in
te
n
a
n
c
e
its
p
o
w
e
r s
u
p
p
ly
c
irc
u
it
M
a
in
te
na
nc
e P
e
rip
he
ra
l a
ud
io
e
q
uip
m
e
nt
The PIN8 of U32 >8.5 V ?
Or the PIN6 U22>3V?
The PIN1 an d 9 of U3 2 ha ve the inp ut
？
or U2 2 PIN4 an d 12 of U2 2 ha ve the inp ut
？
The pi n 1 an d 7o f U1 3 ha ve sign al ou tpu t ?
Amp ou tpu ts ha ve
s i g n a l o r n o t
Re
se
tin
g a
g
a
in
C
he
c
k t
he
sp
e
a
ke
r p
a
rk.
M
a
in
te
n
a
n
c
e
th
e
re
la
tiv
e
c
o
m
p
o
ne
nt
o
f th
is p
in
An
d n
e
tw
o
rk
U2
2 o
r U
32
h
a
ve
d
a
m
a
g
e
d
M
ain
te
na
nc
e
(
co
rre
la
tiv
e
org
an
&
ne
tw
ork
of
pla
yin
g
an
d
in
pu
t )
C
he
c
k U
13
o
utp
ut
to
U
22
o
r c
o
nn
e
c
te
d p
a
rt
The PIN2 and PIN6 of U13
have signal unput ?
M
a
in
te
na
nc
e
U1
3
a
nd
re
la
te
d p
a
rt
ne
t
M
ain
te
na
nc
e t
he
m
ain
bo
ard
a
nd
R
26
6
，
R2
60
N
Y
N
Y
Y
N
N
Y
N Y
Y N
N Y N Y
Y N