Furuno FR-2155, Руководство по обслуживанию

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2-32
2.30 Block Diagram of IF AMP Board (03P6734)
The 60 MHz IF signal from the MIC is amplified in logarithm and converted to a video signal,
which is delivered to the display unit.
1 6 7 2
1
0
J6
0
5
IF
B
a
n
d
w
id
th
S
e
le
cto
r
C
R
6
0
1
6
0
6
IF Am
p
. Board (03P6734C
)
V
ID
E
O
7F
ro
m
0
3
P
6
6
6
6
4F
ro
0
3
P
6
8
2
7
1
1
F
ro
m
D
isp
la
y U
n
it
* M
e
n
u
s
e
ttin
g
G
N
D
J6
0
2
IF
B
a
n
d
w
id
th
C
R
6
1
1
,6
1
2
P
re
-A
m
p
.
Q
6
0
9
P
re
-A
m
p
.
Q
6
0
1
Q
6
0
8
M
B
S
G
e
n
e
ra
to
r
U
6
1
5
T
P
6
0
5
V
id
e
o
A
m
p
.
Q
6
0
5
to
6
0
7
U
6
0
1
U
6
0
2
U
6
0
3
U
6
0
4
U
6
0
5
U
6
0
6
T
P
6
0
1
U
6
0
7
V
C
6
0
1
L
o
g
. A
m
p
.
U
6
0
8
U
6
0
9
U
6
1
0
Q
6
0
3
Q
6
0
4
T
P
6
0
2
T
u
n
in
g
A
m
p
.
U
6
1
6
R
e
g
.
U
6
1
1
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e
g
.
U
6
1
2
R
e
g
.
U
6
1
3
R
e
g
.
U
6
1
4
+
9
V
V
R
6
0
1
T
u
n
in
g
A
d
ju
s
tm
e
n
t
T
P
6
0
3
C
R
6
1
5
T
P
6
0
4
M
IC
P
ro
te
c
t
C
R
6
1
7
9 2 1
3
J6
0
4
J6
0
3
B
a
n
d
w
id
th
M
B
S
T
M
B
S
L
T
U
N
E
M
E
T
E
R
T
o
D
isp
la
y U
n
it
-1
2
V
F
ro
m
P
T
U
p
cb
+
1
2
V
F
ro
m
P
T
U
p
cb
D
I M
O
N
IT
T
o
d
isp
la
y U
n
it
T
U
N
E
C
O
N
T
F
ro
m
C
o
n
tro
l U
n
it
+
5
V
to
+
3
2
V
T
o
M
IC
T
o
M
IC
T
o
M
IC
+
5
V
IF
F
ro
m
M
IC
-9
V
+
9
V
+
7
V