Daewoo DSC-3220E/3220L service manual

Page 52

Service manual SC-150

5-3-20 EHT Compensation

The vertical waveform can be scaled according to the average beam current. This is used to compensate the effects of electric high-tension changes due to beam current variations. EHT compensation for East/West deflection is done with an offset corresponding to the average beam current.

5-3-21 Reset Function

Reset of all VDP functions is performed by the RESQ pin. When this pin becomes active, all internal registers and counters are lost.

5-3-22 Standby and Power-On

The VDP does not have a standby mode. To disable all the analogue and digital video functions, it is necessary to switch off the supplies for analogue front-end (VSUP AF ), analogue back-end (VSUP AB ) and digital circuitry (VSUP D ).

5-4- Microcontroller

5-4-1 Introduction

The TV controller basically consists of the CPU, RAM, ROM, and a number of peripheral modules. For instance:

–a memory banking module is included to allow access to more than 64 kB memory.

–a bootloader softwa re is included to allow in-system-downloading of external code to Flash memory via the I 2 C interface.

The TV controller runs the complete software necessary to control a TV set. The software includes control of the audio, video, OSD, and text processors on chip, as well, as control of external devices like tuner or stereo decoder. Communication between the TV controller and external devices is done either via I 2 C bus interface or via program- mable port pins. The TV Controller is clocked with f OSC = f XTAL /2.

5-4-2 CPU

The CPU is fully compatible to WDC’s W65C02 micro-processor. The processor has 8-bit registers/accumulator, an 8- bit data bus, and a 16-bit address bus.

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Contents Chassis SC-150 Contents General description Main PCB Union PCB Main Features Power consumptionSound Output Power Tuning systemSvhs Pin Signal Description Matching value Page C01 C02C03 C04639.25 S10 S11S12 S13Program Group Skip Special case Country selection = OthersITV Safety instruction RAY Radiation PrecautionOrder Default settingh for SC-150 Alignment instructionsParabola HOR WidthOption HOR Paral BOW HOR Width Corner EW Trapez IC description VCTPage Page Chassis IC marking OSD languages Atss countries Text IC version VCT 3832A VCT 3834APin Name Type Short Description Gndaf Supply AGC Page DSP-Section Audio Baseband Processing Analogue SectionNicam plus FM/AM-Mono German 2-Carrier System Dual FM SystemPAL SECAM-LUssr AdrselResetq DvsupDvss VREF2Features ANAIN1Testen XtalinPin Symbol Function OUT1 GND1OUT1+ ModeTDA8946J Page GND Block diagram TDA6107Q SDA SCLPage Pin Name Symbol Description VIN OVPIIN H TJ TSDDescription IC Pins Symbol Rating Unit I2C Decoder SW1 SW0SW2 SW3IN3 OUTIN1 IN2VEE Circuit description If section Block diagram Vision if Amplifier Standard Features FPLL, VCO and AFCPage Page Adaptive Comb Filter VCT3834A only Video Sync Processing CRT Measurement and Control Page Configuration Stand byDescription Application Forced KEY Page ESC Quadrature MixersPage Page Power supply primary part operations STR-F6654 general descriptionPage STR-F6654 oscillating operation Overcurrent protection function OCP Latch circuitThermal shutdown circuit TSD Overvoltage protection circuit OVPTV start-up operations TV normal run and stand-by mode operations Page FBT SC-150 Controlled Rectifier 6V DC High Service Parts List Cord Power Oxide Film 2W 1.2 OHM J Small Semi Fixed CCZB1H561K Cera Carbon Film Metal Film Carbon Comp PA01A RF27 RD-4Z221J Different Part List by PCB & Micom Version Main PCB Union PCBJumper DEL JumperExplode View PCB Main PCB Union Schematic DiagramMAIN Schematic DiagramUNION

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.
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