Sharp 70GS-61S - Page 23

23
70GS-61S
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
AGNDV
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
127 11
10
1820
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: TDA9886 (IC201)