Daewoo DSC-3220E/3220L service manual ANAIN1, Testen, Xtalin, Xtalout, Features

Models: DSC-3220E/3220L

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Service manual SC-150

Pin No.

Pin Name

Type

Short description

59

ANA_IN1-

In

IF common

60

NC

 

Not Connected

61

TESTEN

In

Test pin

62

XTAL_IN

In

Crystal oscillator

63

XTAL_OUT

Out

Crystal oscillator

64

NC

 

Test pin

4-3 TDA 4470-Multistandard Video-IF and Quasi Parallel Sound Processor

4-3-1- Description

The TDA 4470 is an integrated bipolar circuit for multi-standard video/sound IF (VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.

4-3-2-Features

-5V supply voltage ; low power consumption.

-Active carrier generation by FPLL principle (frequency-phase-locked-loop) for true synchronous demodulation.

-Very linear video demodulation, good pulse response and excellent intermodulation figures.

-Alignment-free AFC without external reference circuit, polarity of the AFC curve is switchable.

-VIF-AGC for negative modulated signals (peak sync. detection) and for positive modulation

(peak white/black level detector).

-Tuner AGC with adjustable take over point.

-Alignment-free quasi parallel sound (QPS) mixer for FM/NICAM sound IF signals.

-Intercarrier output signal is gain controlled (necessary for digital sound processing).

-Complete alignment-free AM demodulator with gain controlled AF output.

-Separate SIF-AGC with average detection

-Two independent SIF inputs

-Parallel operation of the AM demodulator and QPS mixer (for NICAM-L stereo sound).

4-3-3- Pinning

Pin

Symbol

Function

1,2

Vi,SIF1

SIF1 input ( symmetrical)

3

VSW

Input selector switch

4,9,16

GND

Ground

5

VAGC

SIF-AGC (time constant)

6,7

Vi,VIF

VIF input (symmetrical)

8

CAGC

VIF-AGC (time constant)

10

RTOP

Take Over Point, tuner AGC

11

Itun

Tuner AGC output current

12

VO,VID

Video output

13

VSW

Standard switch

14

VSW

L’switch

15

Cbl

Black level capacitor

17

Cref

Internal reference voltage

18

LF

Loop Filter

-28-

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Daewoo DSC-3220E/3220L service manual ANAIN1, Testen, Xtalin, Xtalout, Features

DSC-3220E/3220L specifications

The Daewoo DSC-3220E/3220L is a noteworthy addition to the lineup of high-efficiency air conditioning solutions, specifically crafted to meet the demands of varying climatic conditions. With a blend of innovative technologies and robust design, these models stand out in the realm of home and commercial air conditioning.

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In terms of user convenience, the DSC-3220E/3220L models are engineered with user-friendly controls. Many features, including temperature settings and fan speeds, can be easily adjusted through a remote control or a digital display panel on the unit itself. This ensures that users can customize their comfort levels with minimal effort.

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Overall, the Daewoo DSC-3220E/3220L embodies a fine balance of efficiency, technology, and user-centric design, making it a commendable choice for air conditioning needs in diverse settings. With its reliable performance and thoughtful features, it continues to gain popularity among consumers looking for effective climate solutions.