Daewoo Dtf 2950 Service Manual
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CP-850FX Service Manual Europe R&D 40 Block diagram TDA6108JF 4.9 24C16 - 16 KB EEPROM Features : ƒ 16 Kbit serial I2C bus EEPROM ƒ Single supply voltage : 4.5 V to 5.5 V ƒ 1 Million Erase/Write cycles (minimum) ƒ 40 year data retention (minimum) Pin description Pin No. Name Description 1, 2, 3 E0, E1, E2 Device address – not used 5 SDA Serial Data/Address Input/Output 6 SCL Serial clock 7 WC Write control 8 Vcc Supply voltage 4 Vss Ground The memory device is...
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CP-850FX Service Manual Europe R&D 41 4.10 STR – W6754 4.10.1 GENERAL DESCRIPTION The STR-W6700 series is a Hybrid IC (HIC) designed for Quasi-Resonant type Switching Mold Power Supply built-in a Power MOSFET and Control IC. 4.10.2 FEATURES ƒ operation mode turns blocking oscillation by reducing output voltage at stand-by mode. ƒ In addition to the existing Quasi-Resonant Operation, the Bottom-Skip Function is added in order to be efficient from light to medium load. ƒ...
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CP-850FX Service Manual Europe R&D 42 4.10.4 PIN DESCRIPTION 4.10.5 MOSFET ELECTRICAL CHARACTERISTICS Ratings Parameters Terminal SymbolsM I NT Y PM A XUnits Conditions Drain-Source Voltage ※ 7 1 - 3 VDSS 650― ― V Drain Leakage Current1 - 3 IDSS ― ― 300 µA ON Resistance ※7 1 - 3 RDS(ON)― ― 0.73 Ω Switching Time 1 - 3 ｔf ― ― Nsec ※6 Thermal Resistance ※7― θch-F― ― ℃/Ｗ Channel – Internal Frame Pin No. Symbols Terminal Descriptions Functions 1 D Drain Terminal MOSFET Drain...
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CP-850FX Service Manual Europe R&D 43 4.10.6 ELECTRICAL CHARACTERISTICS Ratings Parameters TerminalSymbols MIN T Y P M A X Units ower Supply Start-up Operation Operation Start-up Voltage 4 - 3 VCC(ON) 18.2 V Operation Stop Voltage 4 - 3 VCC(OFF) 9.6 V Operation Circuit Current 4 - 3 ICC(ON) ― ― 6 mA Non Operation Circuit Current 4 - 3 ICC(OFF) ― ― 100 µA Oscillation Frequency 1 - 3 fOSC 22 kHz Soft-Start Operation Stop Voltage 5 - 3 VSSOLP(SS) 1...
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CP-850FX Service Manual Europe R&D 44 5 CP-850FX CHASSIS DESCRIPTION 5.1 POWER SUPPLY BLOCK DIAGRAM
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CP-850FX Service Manual Europe R&D 45 5.2 VIDEO & STEREO AUDIO BLOCK DIAGRAM
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CP-850FX Service Manual Europe R&D 46 5.3 IF SECTION 5.3.1 BLOCK DIAGRAM
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CP-850FX Service Manual Europe R&D 47 5.3.2 VISION IF AMPLIFIER The video IF signal (VIF) is fed through a SAW filter to the differential input (Pin 6-7) of the VIF amplifier. This amplifier consists of three AC-coupled amplifier stages. Each differential amplifier is gain controlled by the automatic gain control (VIF-AGC). The output signal of the VIF amplifier is applied to the FPLL carrier generation and the video demodulator. SAW filters Ref. Standard Features K3953M B/G - D/K - I -...
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CP-850FX Service Manual Europe R&D 48 5.3.5 VIDEO DEMODULATION AND AMPLIFIER The video IF signal, which is applied from the gain controlled IF amplifier, is multiplied with the inphase component of the VCO signal. The video demodulator is designed for low distortion and large bandwidth. The demodulator output signal passes an integrated low pass filter for attenuation of the residual vision carrier and is fed to the video amplifier. The video amplifier is realised by an operational amplifier...
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CP-850FX Service Manual Europe R&D 49 and SECAM operation a baseband delay line is used for U and V signals. This can be used as comb filter in NTSC operation (only for chrominance). The RGB input from SCART is used as an overlay for the CVBS channel (RGB+FBL). This block contains a matrix (for RGB signals). 5.4.1.2 Input Selector The analog CVBS or SVHS luma signal are fed to the inputs CVBS1...7 of VSP94x2A (amplitude 0.5...1.5 V pp ). One signal is selected and fed to the first ADC. A...