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

Page 44

 

 

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

SAW filters

 

 

 

 

 

Ref.

Standard

Features

K3953M

B/G - D/K - I - L/L’

- IF filter for video application

 

 

- TV IF filter with Nyquist slopes at 33.9 MHz and

 

 

38.9 MHz

 

 

- Constant group delay

K9650M

B/G - D/K - I - L/L’

- IF filter for audio application

 

 

- TV IF audio filter with two channels

 

 

- Channel 1 (L’ ) with one pass band for sound

 

 

carrier at 40.40 MHz

 

 

- Channel 2 ( L, D/K, I, B/G) with one pass band for

 

 

sound carriers between 32.40 MHz and 33.40 MHz

5-2-3 Tuner-and VIF-AGC

At Pin 8, the VIF-AGC charges/discharges the AGC capacitor to generate a control Voltage for setting the gain of the VIF amplifier and tuner in order to keep the video output signal at a constant level. Therefore, in the case of all negative modulated signals (e.g., B/G standard) the sync. level of the demodulated video signal is the criterion for a fast charge/discharge of the AGC capacitor. For positive modulation (e.g., L standard) the peak white level of video signal controls the charge current. In order to reduce reaction time for positive modulation, where a large time constant is needed, an additional black level detector controls the discharge current in the event of decreasing VIF input signal. The control voltage (AGC voltage at Pin 8) is transferred to an internal control signal, and is fed to the tuner AGC to generate the tuner AGC current at Pin 11 (open collector output). The take over point of the tuner AGC can be adjusted at Pin 10 by a potentiometer or an external dc voltage (from interface circuit or microprocessor).

5-2-4 FPLL, VCO and AFC

The FPLL circuit (frequency phase locked loop) consists of a frequency and phase detector to generate the control voltage for the VCO tuning. In locked mode, the VCO is controlled by the phase detector and in unlocked mode,

the frequency detector is superimposed. The VCO operates with an external resonance circuit (L and C parallel) and is controlled by internal varicaps. The VCO control voltage is also converted to a current and represents the AFC output signal at Pin 22. At the AFC switch (Pin 19) three operating conditions of the AFC are possible:

AFC curve “rising” or “falling” and AFC “off”. A practicable VCO alignment of the external coil is the adjustment to zero AFC output current at Pin 22. At center frequency the AFC output current is equal to zero. Furthermore, at Pin 14, the VCO center frequency can be switched for setting to the required L’ value (L’ standard). The optional potentiometer at Pin 26 allows an offset compensation of the VCO phase for improved sound quality (fine adjustment). Without a potentiometer (open circuit at Pin 26), this offset compensation is not active. The oscillator signal passes a phase shifter and supplies the in-phase signal (0o) and the quadrature signal (90o) of the generated picture carrier.

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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.

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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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