Changhong Electric 21BM91, Руководство по обслуживанию, Страница: 19 / 58

SERVICE MANUAL
2. BLOCK DIAGRAM FOR SUPPLY VOLTAGE SYSTEM
.
17
D
e
g
a
u
s
s
in
g
C
irc
u
it
R
T
8
0
1
X
T
8
0
1
S
w
itc
h
R
e
g
u
la
to
r
N
8
0
1
T
8
0
1
e
tc
.
S
a
m
p
lin
g
A
m
p
lif
ie
r
V
D
8
2
0
V
/R
/L
O
u
tp
u
t C
o
n
tr
o
l
V
5
0
1
-V
5
0
3
A
V
S
w
it
c
h
V
e
rti
c
a
l
O
u
tp
u
t
N
6
0
1
2
in
1
IC
N
2
0
1
R
e
g
u
la
to
r
V
8
8
1
V
D
8
8
3
C
8
0
L
in
e
D
riv
e
V
4
3
1
E
E
P
R
O
M
D
7
0
2
2
in
1
IC
N
2
0
1
B
a
n
d
C
o
n
tr
o
l
V
2
3
0
V
2
3
1
S
o
u
n
d
P
o
w
e
r
A
m
p
lif
ie
r
N
3
0
1
V
id
e
o
A
m
p
lif
ie
r
V
9
0
1
-V
9
0
3
S
e
c
o
n
d
S
o
u
n
d
T
ra
p
V
2
0
4
V
2
0
7
H
z
B
rid
g
e
R
e
c
tif
ie
r
V
D
8
0
1
-V
D
8
0
4
C
8
0
3
-C
8
0
6
F
ilt
e
r
L
8
0
3
C
8
0
7
9
V
-2
5
V
-2
1
7
V
5
V
-1
1
1
8
V
3
3
V
2
7
V
1
9
0
V
IF
P
re
-
a
m
p
lif
ie
r
V
1
0
1
2
in
1
IC
N
2
0
1
R
e
g
u
la
to
r
V
8
8
3
V
D
8
8
7
C
8
7
4
R
e
g
u
la
to
r
N
8
0
2
C
8
7
8
R
e
g
u
la
to
r
N
1
2
1
R
1
2
8
C
1
2
5
C
1
2
6
U
1
0
1
T
u
n
e
r
H
V
F
V
S
V
H
o
riz
o
n
ta
l
O
u
tp
u
t
V
4
3
2
F
B
T
T
4
0
2
V
e
rti
c
a
l
O
u
tp
u
t
N
6
0
1
5
V
-2
5
V
-2
L
E
D
R
M
T
C
irc
u
it
N
7
0
1
D
7
0
1
In
te
rfe
re
n
c
e
-
p
ro
o
f
C
irc
u
it
L
8
0
2
C
8
0
1
C
8
0
2
N350
12V
17V
2
2
0V
50Hz
TA1343N
N
302