Daewoo WP-895F, CP-885F service manual CRT Measurement and Control

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

5-3-15 CRT Measurement and Control

The display processor is equipped with an 8-bit ADC for all measuring purposes. The ADC is connected to the SENSE input pin. Cutoff and white-drive current measurement are carried out during the vertical blanking interval.

5-3-16 Average Beam Current Limiter

The average beam current limiter (BCL) uses the SENSE input for the beam current measurement. The BCL uses a different filter to average the beam current during the active picture. The filter bandwidth is approx. 2 kHz. The beam current limiter has an automatic offset adjustment that is active two lines before the first cutoff measurement line. The beam current limiter function is located in the front-end. The data exchange between the front-end and the back-end is done via a single-wire serial interface. The beam current limiter allows the setting of a thresh-old current. If the beam current is above the threshold, the excess current is low-pass filtered and used to attenuate the RGB outputs by adjusting the white-drive multipliers for the internal (digital) RGB signals, and the analogue contrast multipliers for the analogue RGB inputs, respectively. The lower limit of the attenuator is programmable, thus a minimum contrast can always be set. During the tube measurement, the ABL attenuation is switched off. After the white-drive measurement line it takes 3 lines to switch back to BCL limited drives and brightness.

5-3-17 Analogue RGB Insertion

The VCT 38xxA allows insertion of external analogue RGB signals. The RGB signal is key-clamped and inserted into the main RGB by the Fast-Blank switch. The external RGB input can be overlaid or underlaid to the digital picture. The external RGB signals can be adjusted independently as regards DC level (brightness) and magnitude (contrast). All signals for analogue RGB insertion (RIN, GIN, BIN, FBLIN) must be synchronised to the horizontal flyback, other- wise a horizontal jitter will be visible. The VCT 38xxA has no means for timing correction of the analogue RGB input signals. RGB signals are not digitalised and therefore cannot be processed by the picture scaler.

5-3-18 Fast-Blank Monitor

The presence of external analog RGB sources can be detected by means of a Fast-Blank monitor. With a special monitor logic it is possible to detect if there is an external RGB source active and if it is a full screen insertion or only a box. The monitor logic is connected directly to the FBLIN pin. The controlling software uses this information to disable all picture format using display scaler.

5-3-19 Vertical and East/West Deflection

The calculations of the vertical and East/West deflection waveforms is done by the internal Fast Processor (FP).

The algorithm uses a chain of accumulators to generate the required polynomial waveforms. To produce the deflection waveforms, the accumulators are initialised at the beginning of each field. The initialisation values must be computed by the TV control processor and ar e written to the front-end once.

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Contents Colour Television Contents Circuit description PCB Layout Circuit Diagram Power consumption Main FeaturesSound Output Power Tuning systemSpecification matrix Pin Signal Description Matching value Page C02 C01C03 C04C42 S11 S10S12 S13Special case Country selection = Others Program Group SkipITV RAY Radiation Precaution Safety instructionAlignment instructions Order Default settingh for wpParabola HOR WidthDisable HOR Paral BOW Corner EW Trapez IC description Page Page Chassis IC marking OSD languages Atss countries Text IC version VCT 3832APin Name Type Short Description Gndaf Supply VCT Page Analogue Section DSP-Section Audio Baseband ProcessingNicam plus FM/AM-Mono German 2-Carrier System Dual FM SystemSECAM-L PALUssr AdrselDvsup ANAIN1 FeaturesTesten XtalinPin Symbol Function GND1 OUT1OUT1+ ModeBlock diagram TDA8944J GND Page Page Inverting input Block diagram TDA6107Q SCL SDAPage Description IC PIN Symbol Rating Unit OCH -F MINCircuit 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 Stand by ConfigurationDescription Application Page Page Quadrature Mixers ESCPage Page STR-F6654 general description Power supply primary part operationsPage STR-F6654 oscillating operation Latch circuit Overcurrent protection function OCPThermal 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.

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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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