Sanyo CP29AF2X - Page 6

IC Block Diagrams
-6-
IC201 <IF System Block Diagram> LA76818
11
12
BUS
Interface
SAW
5
6
4
8 7
PIF
In1
PIF
In2
IF In
9V
30K
RF AGC
Out
120K
IF VCC
IF
GND
VIF AMP
VIF 1
VIF 2
VIF 3
IF AGC
Drive
RF
AGC
2ndIF
AGC
RF AGC
Delay
6bit
IF AGC
Def
1bit
+
-
(6 Vcc)/7
To
BUS
3
0.022u
PIF
AGC
IF
AGC
Data
Clock
APC
Det
+/4
-/4
Snd
Det
Amp
52
SIF.Out
Sound
Tra p
Video
Det
Buzz
Canceller
50
APC
Filter
330
0.47u
+
PLL Pull-in SW
To
BUS
Lock
Det
Video.Level
3bit
Amp
54
10p
SIF.In
Sound
BPF
VCO.Coil
VCO
COIL1
VCO
COIL2
48
49
VIF
VCO
Chroma
Counter
B/N INV
IF
Ident
OSC
C/D
Amp
SIF. Sys
2bit
pre-
scaller
SIF
VCO
500K
BPF
SIF
APC
Filter
1K
0.01u
1000p
53
LIM
AMP
FM
Det
FM.Level
5bit
Chroma
C/D
APC
Det
500K
Det
To
BUS
Chroma
VCO
VIF
Counter
Reset
Pulse
VCO
Ident
VIF.Sys
2bit
Phase
Detector
A.MUTE
1bit
VOLUME
D/A
VOLUME
Filter
A.SW
1bit
Input
Select
VOLUME
(ATT)
-
+
-
+
2.5V
Amp
FM Gain
1bit
Deem-TC
1bit
De-
emph
FM Mute
1 bit
2
9
46
51
1
A.Fil.Def
1bit
VOLUME
7bit
47
VCO
Alignment
AFT
10
AFT
Vcc
100K
100K
0.1u
VCO
Filter
+
0.47u
Audio.out
+
Audio in
10u
Video
Out
FM
Filter
+
1u
FM
Out
0.01u
+
to BUS Line
+