Sharp 32JF-76E Service Manual page 54

C VAGC(pos)
TOP TAGC VAGC
9 (8) 14 (15) 16
C AGC(neg)
C BL
TUNER AGC VIF-AGC
VIF2 2 (31)
VIF1 1 (30)
SINGLE REFERENCE QSS MIXER
SIF2 24 (27)
SIF1 23 (26)
SUPPLY SIF AGC
C AGC
(6, 12, 13, 14, 17,
19, 25, 28, 29, 32)
13
20 (22) 18 (20)
V P AGND n.c.
(1) Not connected for TDA9885.
Pin numbers for TDA9885HN in parenthesis.
external reference signal
or 4 MHz crystal
VIF-PLL
filter
(1)
VPLL
19 (21)
RC VCO DIGITAL VCO CONTROL
VIF-PLL
TDA9885
TDA9886
INTERCARRIER MIXER
AND AM DEMODULATOR
MAD
OUTPUT
2
I C-BUS TRANSCEIVER
PORTS
11 (10) 10 (9)
3 (1) 22 (24) 7 (5)
OP1 OP2 SCL SDA DGND
sound intercarrier output
and MAD select
Fig.1 Block diagram.
REF AFC
15 (16) 21 (23)
AFC DETECTOR
(18) 17
SOUND TRAPS
4.5 to 6.5 MHz
(7) 8
AUDIO PROCESSING
(3) 5
AND SWITCHES
(4) 6
NARROW-BAND
FM-PLL DEMODULATOR
4 (2)
12 (11)
SIOMAD FMPLL
MHC108
FM-PLL
filter
CVBS
video output: 2 V (p-p)
[1.1 V (p-p) without trap]
AUD
audio output
DEEM
de-emphasis
network
AFD
C AF