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IC BLOCK DIAGRAM
IC904 LC7566(Flourecent Display Driver of Spectrum Analizer)
Osc
4
G.PH E
+ 12dB
+ 24dB —
A13
+10
22
—
112
+8
20
All
+6
18
—
FI1O
+4
16
—
.49
+2
14
—
A8
o
12
Al
-2
10
A6
-4
8
—
AS
-6
6
—
A4
-8
4
—
A3
-10
2
—
A2
-12
0
—
Al
fl
f2
f3
f4
fs
f6
f7
T
Osc
WOD
Vss
IC203
LM7001
Svc
I
14
-.=
6
PD1
PD2
2
REFEFHWE
DIVICHI
XOUT 1
FMIN
11
10
AMI
o-
*
o-
0-
-
0-
0-
J'
12 VDD1
13 VDD2
m
3437
8
9
B03
CE
CL DATA
BO1 B02
–2l-
G Pll TPH
?-.?
Al
!12
In
A4
A5
A6
Al
M
A9
rho
All
Al?
113
G1
C2
G3
G4
G5
G6
G7
G8
N.C
Offf
I
*
TEST2
IC375 PPC1330HA (2-ch Head Select SW
for Tape Deck )
J7
7+5
A
,..'
,.,
,:.
,
,", .,
,.
.,,
./,
.:
!.,
.'
".,
,,
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