Daewoo DSC-3220E/3220L - Manual (Page 30)

Service manual SC-150
-29-
Pin Symbol Function
19 V
SW
AFC switch
20, 21 V
VCO
VCO circuit
22 V
AFC
AFC output
23 V
S
Supply voltage
24 V
O, FM
Intercarrier output
25 V
O, AM
AF output-AM sound
26 R
COMP
Offset compensation
27, 28 V
i,SIF2
SIF2 input (symmetrical)
4-3-4 Block diagram
Offset
26 18 20 21 14
VCO
l' switch
VCO Control
phase shift
FPLL
VIF amp
Loop
filter
comp.
(optional)
+
4,9,16 AM det.
FM det.
25
24
17
Cref
23
13
22
19
6
7
8
15
11
10
27
28
3
1
2 SIF 1
CAGC
5
Standard
Video det.
VIF
CAGC
CBL
AGC
(VIF)
Tuner
AGC
AGC
(SIF)
Tuner
SIF 2
SIF input
switch
SIF amp
Take over
point
Video
AFC
AFC
switch
AFC
Supply
Standard
switch
V
AF
(AM)
Intercarrier
(FM/NICAM)