Daewoo DTY-2880/28W5, DTZ-29U7/U3, DTZ-2881/28W8, DTY-21U7/21B4, DTC-21Y1/21Y2, DTC-20T2 Wprgb

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CP-520/520A/520F Service Manual

WPR(GB)

‘0’

B5

B4

B3

B2

B1

B0

Max 64

CL

‘0’

B3

B2

B1

B0

‘0’

‘0’

Max 60

CCC-gain

B6

B5

B4

B3

B2

B1

B0

Max 126

R(GB)-gain

B6

B5

B4

B3

B2

B1

B0

Max 126

The setting of the gain registers of the 3 channels can be stored during switch off and can be loaded again during switch-on so that the drive conditions are maintained.

When required the operation of the CCC system can be changed into a one-point black current system. The switching between the 2 possibilities is realised by means of the EGL bit (EGL = 0) in subaddress 42H. When used asone-point control loop the system will control the black level of the RGB output signals to the ‘low’ reference current and not on the cut off point of the cathode. In this way spreads in the picture tube characteristics will not be taken into account. In this condition the settings of the “white point control registers”(subaddress 20H-22H) and the “cathode drive level bits” (CL3 - CL0 in subaddress 42H) are added to the settings of the RGB preset gain registers (subaddress 23H - 25H).

A black level off-set can be made with respect to the level which is generated by the black current stabilization system. In this way different colour temperatures can be obtainedforthebrightandthedarkpartofthepicture.The black level control is active on the Red and the Green output signal. It is also possible to control the black level of the Blue and the Green output signal (OFB bit = 1).

In the Vg2 adjustment mode (AVG=1) the black current stabilization system checks the output level of the 3 channels and indicates whether the black level of the highest output is in a certain window(WBC-bit) or below or above this window (HBC-bit). This indication can be read from the status byte 01 and can be used for automatic adjustment of the Vg2 voltage during the production of the TV receiver. During this test the vertical scan remains active so that the indication of the 2 bits can be made visible on the TV screen.

The control circuit contains a beam current limiting circuit and a peak white limiting circuit. The control is realised by means of a reduction of the contrast and brightness control settings. The way of control (first contrast and then brightness or contrast and brightness in parallel) can be chosen by means of the CBS bit (subaddress 44H). The peak white level is adjustable via the I2C-bus.

To prevent that the peak white limiting circuit reacts on the high frequency content of the video signal a low-passfilter is inserted in front of the peak detector. The circuit also contains a soft- clipper which prevents that the high frequency peaks in the output signal become too high. The difference between the peak white limiting level and the soft clipping level is adjustable via the I2C-bus in a few steps.

During switch-off of the TV receiver a fixed beam current is generated by the black current control circuit. This current ensures that the picture tube capacitance is discharged. During the switch-off period the vertical deflection can be placed in an overscan position so that the discharge is not visible on the screen.

A wide blanking pulse can be activated in the RGB outputs by means of the HBL bit in subaddress 43H. The timing of this blanking can be adjusted by means of the bits WBF/R bits in subaddress 26H.

DTV R&D Europe

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Contents Color Television Chassis CP-520 TDA8946J Stereo Audio Amplifier Contents Document History Main Features SpecificationsIC Description UOC III Series TDA8358J Vertical AmplifierALL Versions Schematic DiagramStereo and AV Stereo Versions Mono Versions Functional Description Sound ProcessorDocument History Version Date Comments EURO-SCART 1 21 Pin Signal Description Matching value GeneralPin Signal Description Matching value EURO-SCART 2 21 PinCHANNEL/FREQUENCY Table Channel Europe Ccir France Gbireland East OirtC48 C46C47 C49S20 S18S19 S21Safety Instruction RAY Radiation Precaution Safety PrecautionProduct Safety Notice Order Default setting Microcontroller Configuration Service ModeService Mode Navigation HOR CEN RED Gain GRN Gain Blue Gain RED Bias GRN BiasTuner Options Chassis Model OptionRemarks Navigation in NVM Editor mode Entering into Factory modeEntering into NVM Editor mode Exit NVM Editor modeNVM Data Change List Vertical Geometry 1 G2 AlignmentWhite Balance Horizontal Picture CentringCorner B & Corner T EW Trapez 7 AGCBulgarian IC DescriptionIC Marking and Version CZECH, German DANISH, SpanishBlock Diagram QFP 128pin Short DescriptionGND3 BlkinBclin PBIN3GND2 SIFAGC/DVBAGCPllif QSSO/AMOUT/AUDEEAnalogue video processing stereo versions FeaturesAnalogue Video Processing all versions Analogue video processing mono versionsAudio interfaces and switching mono versions Sound Demodulation all versionsStereo Demodulator and Decoder full stereo versions Audio Multi Channel Decoder stereo versions with Audio DSP RDS/RBDSController Data Capture DisplayTDA8946J Stereo Audio Amplifier OUT1+ Pin Symbol DescriptionOUT1 ModeBlock diagram TDA8946J TDA8358J Vertical Amplifier 1 TDA8358JOutb INAINB InewFeatures Pin descriptionGND Pin No Name Description General Description IIN H PIN Description Name SymbolOVP TJ TSDMosfet Electrical Characteristics IC PIN Rating Description Symbol MIN Type MAX UnitOCH F Circuit Description QSS sound circuit Functional Description of Video ProcessorVision if amplifier FM demodulatorMono Versions Audio input selector and volume controStereo and AV Stereo Versions ALL VersionsSynchronisation circuit Horizontal and vertical drive Colour decoder RGB output circuit Wprgb Write registers 11 I2C-BUS User Interface DescriptionPossible slave address Read registersOther features of the Demdec are Analog 2-CARRIER Systems Table Frequency modulationA2+ Korea ParameterA2/A2 CarriersystemswithnicamFunctional Overview Of the digital controller sound part Introduction MixerFmandamdemodulation Fmpilotcarrierpresentdetector FmidentificationFM/AMDECODING NicamdemodulationNicam AUTO-MUTE Service Parts List DTV- R&D Europe CCXB1H561K Cera Carbon Film Carbon Comp DTC-20T2FZS-S E30 4856310300 PCB Main CP-520A DTC 100 OHM J J500 85801065GY Packing AS DTC-20T2FZS-S DTC-21Y1FZF-S E33 4856310300 1N4937G 2.2K OHM F Packing AS DTC-21Y1FZF-S DTZ-29U7FZF-S Partsname 3M #232 6.0X2000M A001 4859809993 J38 85801065GY Packing AS DTZ-29U7FZS-S Exploded View Exploded View 7-2DTY-2880 Exploded View 7-3DTY-21U7 Exploded View 7-4DTY-25G6 Exploded View 7-5DTC-20T2 Exploded View 7-6DTC-21Y1 Exploded View 7-7DTZ-29U7 Exploded View 7-8DTZ-2881 Exploded View 7-9DTZ-2481 Printed Circuit Board 4859809893CP-520A 4859809993CP-520F Schematic Diagram CP-520A CP-520F

DTZ-2481, DTZ-29U7/U3, DTC-21Y1/21Y2, DTY-21U7/21B4, DTY-2880/28W5 specifications

The Daewoo DTC-20T2, DTY-28A8, DTY-28A6, DTY-28A7, DTZ-2881/28W8, DTY-25G6/25G7, and DTY-2880/28W5 represent a range of innovative and feature-rich vehicles that reflect Daewoo's commitment to quality and advanced technology. Each model combines sleek design with performance excellence, appealing to a wide range of consumers.

Starting with the DTC-20T2, this compact car offers a combination of efficiency and agility. Its lightweight design enhances fuel economy while maintaining stability on the road. Equipped with a state-of-the-art engine, the DTC-20T2 delivers a responsive drive, making it ideal for city commuting and weekend getaways.

The DTY-28A8 is known for its spacious interior and comfort features. It boasts advanced infotainment systems, including touch screens and smartphone connectivity, catering to modern drivers. Safety is paramount, with multiple airbags and advanced braking systems ensuring peace of mind on every journey.

Similarly, the DTY-28A6 and DTY-28A7 share many design elements but have unique enhancements that differentiate them. They incorporate advanced suspension systems that provide a smooth driving experience while navigating urban and rural landscapes. These models also feature high-efficiency engines that strike a balance between power and fuel consumption.

Moving to the DTZ-2881/28W8, this vehicle makes a statement with its bold design and robust performance. This model is designed with aerodynamics in mind, reducing drag and enhancing fuel efficiency. It includes innovative technologies like regenerative braking, which captures energy during deceleration, extending the vehicle's overall efficiency.

The DTY-25G6/25G7 and DTY-2880/28W5 are particularly impressive with their emphasis on versatility. These models offer various configurations and layouts to cater to different needs, whether for families or individuals. They feature expanded cargo capacity and modular seating arrangements that can accommodate both passenger and transportation requirements.

In conclusion, the Daewoo DTC-20T2, DTY-28A8, DTY-28A6, DTY-28A7, DTZ-2881/28W8, DTY-25G6/25G7, and DTY-2880/28W5 showcase a blend of performance, technology, and comfort across their varying models. From advanced safety features to innovative fuel efficiency technologies, these vehicles are tailored to meet the needs of a diverse clientele, reinforcing Daewoo’s stature in the automotive industry.