23
70GS-62S
BLOCK DIAGRAM
TAGC
C
VAGC pos
C
BL
VIF-PLL
4 MHz
external
AFC
video output 2 V (p-p)
[1.1 V (p-p) without trap]
AUD
C
AF
de-emphasis
network
FM-PLL filter
sound intercarrier output
C
AGC
AGND
V
P
VIF1
VIF-AGC
RC VCO
DIGITAL VCO CONTROL
AFC
DETECTOR
VIDEO TRAPS
4.5 to 6.5 MHz
NARROW-BAND FM-PLL
DETECTOR
I
2
C-BUS TRANSCEIVER
VIF-PLL
SINGLE REFERENCE QSS MIXER/
INTERCARRIER MIXER AND
AM-DEMODULATOR
SIF-AGC
SUPPLY
1
2
14
16
19
15
21
17
8
6
5
4
12
7
11
10
18
20
23
24
OUTPUT
PORTS
MAD
AUDIO PROCESSING
AND SWITCHES
9
TUNER AGC
C
AGC neg
3
22
crystal
and MAD select
TDA9885
n.c.
13
OP1
OP2
SCL
SDA
DGND
SIOMAD
FMPLL
CVBS
TOP
VIF2
SIF1
SIF2
DEEM
AFD
REF
VAGC
VPLL
filter
(1)
(1)
Not connected for TDA9885.
reference
or
ICs ADITIONAL INFORMATION: TDA9885 (IC201)