Daewoo WP-895F, CP-885F service manual

Page 56

Service manual WP 895/895F, CP885/885F

5-6-4 NICAM decoder

In case of NICAM - mode, the phase samples are decoded according the DQPSK - coding scheme. The output of this block contains the original NICAM bitstream.

5-6-5 DSP section

All audio baseband functions are performed by digital signal processing (DSP). The DSP section controls the source and output selection, and the signals processing.

5-6-6 Sound Mode switching

In case of NICAM transmission, the controlling software reads the bit error rate and the operation mode from the NICAM Decoder. When the set is in “Auto detection” mode ( default mode after ATSS ) the controlling software sets automatically the sound mode ( NICAM mono, NICAM Dual 1 or NICAM Dual 2 ) depending on the transmitted mode.

In the case of 2 Carrier FM transmission, the controlling software read the transmission mode and the signal quality level from the Stereo Detection Register. When the set is in “Auto detection” mode the controlling software automatically sets the sound mode ( mono, Stereo, Dual 1, Dual 2 ) depending on the transmitted mode.

In “Auto detection” mode the controlling software evaluates the signal quality and automatically switches to the analogue sound carrier 1, if the transmission quality is too poor. To avoid unwanted automatic switching the threshold levels mono to stereo and stereo to mono are different.

In “forced mono “ mode ( Red OSD in status Display Window), the controlling software configures the MSP341xD to demteonldulay the analogue (FM or AM) sound carrier 1, no matter the signal quality. The sound mode “ forced “ or “ Autodetect” is stored for each programme.

5-7 Sound amplification

The TDA8944J (TDA8946J) is a stereo BTL audio amplifier capable of delivering 2 x 7 W (2 x 15 W) output power to an 8 W load at THD = 10%, using a 12 V power supply and an external heatsink. The voltage gain is fixed at 32dB.

With the three-level MODE input the device can be switched from ‘standby’ to ‘mute’ and to ‘operating’ mode. The TDA 8944J outputs are protected by an internal thermal shutdown protection mechanism and short-circuit protection.

5-7-1 Power amplifier

The power amplifier is a Bridge Tied Load (BTL) amplifier with an all-NPN output stage, capable of delivering a peak output current of 1.5 A.

The BTL principle offers the following advantages :

-Lower peak value of the supply current.

-The ripple frequency on the supply voltage is twice the signal frequency.

-No DC-blocking capacitor

-Good low frequency performance

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Contents Colour Television Contents Circuit description PCB Layout Circuit Diagram Main Features Power consumptionSound Output Power Tuning systemSpecification matrix Pin Signal Description Matching value Page C01 C02C03 C04C42 S10 S11S12 S13Program Group Skip Special case Country selection = OthersITV Safety instruction RAY Radiation PrecautionOrder Default settingh for wp Alignment instructionsParabola HOR WidthDisable HOR Paral BOW Corner EW Trapez IC description Page Page Pin Name Type Short Description IC version VCT 3832AChassis IC marking OSD languages Atss countries Text Gndaf Supply VCT Page DSP-Section Audio Baseband Processing Analogue SectionNicam plus FM/AM-Mono German 2-Carrier System Dual FM SystemPAL SECAM-LUssr AdrselDvsup Features ANAIN1Testen XtalinPin Symbol Function OUT1 GND1OUT1+ ModeBlock diagram TDA8944J GND Page Page Inverting input Block diagram TDA6107Q SDA SCLPage Description IC PIN Symbol Rating Unit MIN OCH -FCircuit description If section Block diagram Vision if Amplifier Standard Features Page Page Adaptive Comb Filter VCT3834A only Video Sync Processing CRT Measurement and Control Page Configuration Stand byDescription Application Page 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 CP885/885F N T R O L L E D Rectifier 6V DC High Service Parts List Spark GAP CBXF1H104Z Cera Semi 50V F 0.1MF Z Tapping CZSL1H220J Cera 50V SL 22PF J Axial CCZB1H222K Cera Coil Peaking Wire Copper Carbon Comp Exploded View Exploded View DTF-29U8 DTP-28A7 Service Man ual WP-895/895F, CP885/885F DTP-28G7 DTP-28G8 Printed Circuit Board Page Page 686, AHYEON-DONG MAPO-GU SEOUL, Korea

CP-885F, CP-885, WP-895, WP-895F specifications

The Daewoo WP-895F, WP-895, CP-885, and CP-885F are versatile washing machines that embody the brand’s commitment to quality and innovation. These models are designed to meet the diverse needs of modern households, offering a range of features that enhance laundry efficiency and user convenience.

The WP-895F and WP-895 are known for their user-friendly design and robust functionality. They come equipped with advanced washing programs that cater to various fabric types, ensuring optimum care for garments. One of the standout features of these models is the 10kg capacity, which is ideal for larger families or those who frequently do laundry. The machines boast an energy-efficient motor that reduces power consumption while delivering superior washing performance.

Integrated with smart sensors, the WP-895F and WP-895 adjust water levels according to the load size, optimizing resource usage and making washing more economical. Additionally, the models feature a delayed start option, allowing users to schedule wash cycles at their convenience.

On the other hand, the CP-885 and CP-885F stand out for their compact design and functionality. Ideal for apartments or smaller spaces, these machines offer a 7.5kg capacity while delivering impressive wash quality. They include specialized washing modes for delicates, heavy-duty fabrics, and quick washes, thus accommodating a wide range of laundry needs.

Both CP models are designed with user comfort in mind, featuring intuitive control panels that simplify operation. The CP-885F includes an enhanced filtration system that captures lint and other particles, ensuring cleaner wash results while prolonging the machine's lifespan.

Each model incorporates durable and reliable technology, with stainless steel drums that resist rust and enhance longevity. The noise reduction technology also ensures that laundry day remains a peaceful experience, reducing operational sound levels significantly.

Overall, the Daewoo WP-895F, WP-895, CP-885, and CP-885F are equipped with essential features and cutting-edge technologies that cater to the evolving demands of households. With their combination of efficiency, capacity, and innovative design, these washing machines exemplify Daewoo's dedication to improving everyday laundry experiences. Whether for large families or smaller living spaces, these models provide robust solutions that make laundry tasks simpler and more effective.
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