Block Diagram - Hyundai HLT-1751 Service Manual

TDA4470

Block Diagram

Offset
comp.
(optional)
6
Ï
VIF
7
Ï
C
AGC
8
Ï
15
Ï
C
BL
Tuner
11
Ï
Ï
10
Ï
Take over
point
27
Ï
SIF 2
28
Ï
Ï
SIF input
switch
3
Ï Ï
1
Ï Ï
SIF 1
2
Ï
5
Ï
Ï
C
AGC
Loop
filter
26 18
Ï Ï
FPLL
90
VIF amp
AGC
(VIF)
Tuner
AGC
SIF amp
AGC
(SIF)
Figure 1. Block diagram
VCO
21
20
Ï Ï Ï
VCO
0
+
phase shift
Video det.
Supply
FM det.
AM det.
Ï Ï
L' switch
Ï Ï
14
Ï Ï
Control
19
Ï Ï Ï
Ï Ï Ï
AFC
22
Ï Ï
12
Ï Ï
13
Standard
Ï Ï Ï
23
Ï Ï Ï
Ï Ï Ï
17
Ï Ï
C
Ref
24
Ï Ï
Intercarrier
(FM / NICAM)
25
Ï Ï Ï Ï
4,9,16
Ï Ï
Ï Ï
95 10851
AFC
switch
AFC
Video
Standard
switch
V
S
AF
(AM)