Philips TCM2.0E Service Manual page 80

EN 80 9. TCM2.0E LA
9.4.4 Diagram B, SIL9185
Block Diagram
9.4.5 Diagram B, TDA9886
C VAGC(pos)
TOP TAGC
9 ( ) 8 14 (15)
C AGC(neg)
TUNER AGC
VIF2 2 (31)
VIF1 1 (30)
SIF2 24 (27)
SIF1 23 (26)
SUPPLY
20 (22) 18 (20)
V P AGND
(1) Not connected for TDA9885.
Pin numbers for TDA9885HN and TDA9886HN in parenthesis.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Figure 9-5 Block diagram
VIF-PLL
filter
(1)
VAGC VPLL
1 6 1 ( ) 7 19 (21)
C BL
VIF-AGC RC VCO
VIF-PLL
SINGLE REFERENCE QSS MIXER
INTERCARRIER MIXER
AND AM DEMODULATOR
MAD
OUTPUT
2
SIF-AGC I C-BUS TRANSCEIVER
PORTS
C AGC
(6, 12, 13, 14, 17,
19, 25, 28, 29, 32)
13 3 (1) 22 (24) 11 (10)
n.c. O P 1 O P 2 SCL
Figure 9-6 Block diagram
external reference signal
or 4 MHz crystal
REF AFC
1 5 1 ( ) 6 2 1 2 ( ) 3
DIGITAL VCO CONTROL AFC DETECTOR
SOUND CARRIER
TRAPS
4.5 to 6.5 MHz
TDA9885
TDA9886
AUDIO PROCESSING
AND SWITCHES
NARROW-BAND
FM-PLL DEMODULATOR
10 (9) 7 (5) 12 (11)
SDA DGND SIOMAD
sound intercarrier output
and MAD select
H_17370_074.eps
100807
(18) 17
CVBS
video output: 2 V (p-p)
[1.1 V (p-p) without trap]
(7) 8 AUD
audio output
(3) 5 DEEM
de-emphasis
network
AFD
(4) 6
C AF
4 (2)
F M P L L
FM-PLL
filter
I_17930_072.eps
250408