Manuals / Daewoo / TV and Video / CRT Television

Daewoo DSC-3220E/3220L service manual Configuration, Stand by

Models: DSC-3220E/3220L

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Service manual SC-150

5-4-3 - Controller I/O pin configuration and function

There exist different kinds of ports. The universal ports serve as digital I/O and have additional special input and output functions. A subset of the universal ports serves as input for the analogue-to-digital converter.

- Controller I/O pin configuration and function table

pin

name

configuration

description

Stand by

TV ON

 

 

 

1

Power

Push Pull Low

Push Pull High

Switch OFF / ON SMPS

2

AGC

High impedance

High impedance

Tuner AGC level input –

 

 

 

 

For factory use only

5

Mod SW

High impedance

Push Pull

High = Negative

 

 

 

 

modulation, Low = Positive

 

 

 

 

modulation (L/L’).

 

 

 

 

 

6

SECAM L’

High impedance

Push Pull

Low = L, High =L’

7

AFC

High impedance

High impedance

ADC input

8

IR

High impedance

High impedance

Interrupt input

9

SC1 SW

High impedance

High impedance

SCART 1 slow switching –

 

 

 

 

ADC input

10

SC2 SW

High impedance

High impedance

SCART 2 slow switching –

 

 

 

 

ADC input

 

 

 

 

 

61

Mute

Push Pull

Push Pull

High = Mute active

62

LED

Open Drain

Open Drain

 

63

KB

High impedance

High impedance

Keyboard input – ADC

 

 

 

 

input

 

 

 

 

 

64

OCP

High impedance

High impedance

Over Current Protection –

 

 

 

 

Switch the set to Std by if < 2.

To reduce power consumption in stand by mode all ports not used are configured in high impedance mode.

5-4-4 Tuning

The AFC information is supplied by the demodulator IC, and becomes available on VCT pin 7 for controlling software. The controlling software uses this information for tuner frequency tracking ( automatic following ). The AFC window is typically between 50 KHz and 100 KHz.

The minimum frequency step of the tuner is 50 Khz.

This AFC function is disabled when a program is tuned using the direct frequency entry or after fine tuning adjustment. Therefore it is recommended to tune channel with the TV search function ( manual or ATSS ) or using the direct channel entry to enable the Automatic Frequency Control.

5-4-5 Automatic Format switching and WSS

When AUTO mode is selected by the user, the television will automatically select a mode for the user. The format information is supplied by SCART pin 8 level when in AV mode or by WSS data. The signal contains codes as defined in the WSS European Telecommunication Standard, ETS 300 294. Briefly, the signal is received at the beginning of line

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Daewoo DSC-3220E/3220L service manual Configuration, Stand by
Page 52 Page 54

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.

One of the main features of the DSC-3220E/3220L is its efficient cooling performance. The units are built with advanced rotary compressors, which are designed to operate efficiently while providing powerful cooling capabilities. This allows for quick temperature adjustments, making it an ideal choice for those who seek rapid relief from heat.

Another remarkable aspect of the DSC-3220E/3220L is its energy-efficient operation. With a superior Energy Efficiency Ratio (EER), these air conditioning units ensure that energy consumption is minimized without compromising comfort. This not only reduces electricity bills but also contributes to a smaller carbon footprint, making it an environmentally friendly choice.

The units also come equipped with state-of-the-art air filtration technologies. The multi-layer air filters are designed to capture dust, pollen, and other airborne particles, ensuring that the air in the environment remains clean and healthy. This feature is particularly beneficial for allergy sufferers and enhances the overall indoor air quality.

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.

Noise reduction is another critical characteristic of the DSC-3220E/3220L. Both models are designed with silent operation in mind, making them suitable for bedrooms, offices, and other environments where noise can be a distraction. The sound insulation techniques employed help maintain a serene atmosphere while enjoying optimal cooling.

Furthermore, installation of the DSC-3220E/3220L air conditioning systems is straightforward, making them accessible for residential and commercial settings alike. The compact design and versatility in installation options allow these units to fit seamlessly into various spaces without sacrificing performance.

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.