Block Diagram - Daewoo CHASSIS : SC-150 Model : DSC-3220E Service Manual

Service manual SC-150
Pin
19
20, 21
22
23
24
25
26
27, 28

4-3-4 Block diagram

Symbol
V AFC switch
SW
V VCO circuit
VCO
V AFC output
AFC
V Supply voltage
S
V Intercarrier output
O, FM
V AF output-AM sound
O, AM
R Offset compensation
COMP
V SIF2 input (symmetrical)
i,SIF2
Loop
Offset
filter
comp.
(optional)
26 18
FPLL
VIF amp
6
VIF
7
C AGC
8
AGC
15
(VIF)
C BL
11
Tuner
Tuner
10
AGC
Take over
point
27
SIF 2 28
SIF amp
SIF input
switch 3
1
SIF 1
AGC
2
(SIF)
5
C AGC
Function
l' switch
VCO
20 21 14
VCO
Control
+
phase shift
19
AFC
switch
AFC
22
AFC
Video
Video det.
Standard
13
switch
Standard
23
V
Supply
17
C ref
FM det.
24
Intercarrier
(FM/NICAM)
25
AF
(AM)
AM det. 4,9,16
-29-