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Service manual sc-150, Pin symbol function 19 v, Afc switch 20, 21 v – Daewoo DSC-3220E/3220L User Manual

Page 30: Vco circuit 22 v, Afc output 23 v, Supply voltage 24 v, Intercarrier output 25 v, Af output-am sound 26 r, Offset compensation 27, 28 v, Sif2 input (symmetrical) 4-3-4 block diagram

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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)

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