Daewoo DDT-21H9ZZF Service Manual Download Page 3

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Service Manual CP-099F

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4-2-1-3 Analogue Section ------------------------------------------------------------------------------------------------------ 22
4-2-1-4 NICAM plus FM/AM-Mono ----------------------------------------------------------------------------------------- 22
4-2-1-5 German 2-Carrier System (DUAL FM System) ------------------------------------------------------------------- 22

4-3 TDA9886 IIC-bus controlled single/multi standard algnment-free IF-PLL -------------------------------------------- 25

4-3-1 DISCRIPTION  ------------------------------------------------------------------------------------------------------------ 25
4-3-2 FEATURES  ---------------------------------------------------------------------------------------------------------------- 25
4-3-3 PINNING  ------------------------------------------------------------------------------------------------------------------ 25

4-4 TDA894xJ Stereo Audio Amplifer ------------------------------------------------------------------------------------------ 27

4-1-1 Features -------------------------------------------------------------------------------------------------------------------- 27

4-5 TDA835xJ Vertical Amplifier ------------------------------------------------------------------------------------------------ 29

4-5-1 TDA8358J ----------------------------------------------------------------------------------------------------------------- 29

4-6 TEA5101B  ---------------------------------------------------------------------------------------------------------------------- 30
4-7 24C16 - 16 Kb EEPROM  ----------------------------------------------------------------------------------------------------- 32
4-8 STR - F6654  -------------------------------------------------------------------------------------------------------------------- 32

4-8-1 General description  ------------------------------------------------------------------------------------------------------- 32
4-8-2 Features  -------------------------------------------------------------------------------------------------------------------- 32
4-8-3 Block diagram  ------------------------------------------------------------------------------------------------------------- 33
4-8-4 Pins description  ----------------------------------------------------------------------------------------------------------- 33
4-8-5 Control part electrical characteristics  ---------------------------------------------------------------------------------- 34
4-8-6 MOSFET electrical chatacteristics  ------------------------------------------------------------------------------------- 34

5- Circuit description --------------------------------------------------------------------------------------------------------------------- 35

5-1 Block diagram ------------------------------------------------------------------------------------------------------------------ 35
5-2 IF section ------------------------------------------------------------------------------------------------------------------------ 36

5-2-1 Picture IF Amplifier  ------------------------------------------------------------------------------------------------------ 36
5-2-2 Tuner and VIF-AGC ------------------------------------------------------------------------------------------------------ 36
5-2-3 VIF-AGC detector  -------------------------------------------------------------------------------------------------------- 36
5-2-4 Frequency phase-Locked Loop(FPLL) detector  ---------------------------------------------------------------------- 36
5-2-5 VCO and divider  ---------------------------------------------------------------------------------------------------------- 36
5-2-6 Digital acquisition help and AFC --------------------------------------------------------------------------------------- 37
5-2-7 Video demodulator and amplifier --------------------------------------------------------------------------------------- 37
5-2-8 Sound carrier trap  --------------------------------------------------------------------------------------------------------- 37
5-2-9 SIF amplifier --------------------------------------------------------------------------------------------------------------- 37
5-2-10 AGC detector  ------------------------------------------------------------------------------------------------------------ 37
5-2-11 Single reference QSS mixer -------------------------------------------------------------------------------------------- 38
5-2-12 AM demodulator  -------------------------------------------------------------------------------------------------------- 38
5-2-13 FM demodulator and acquisition help  -------------------------------------------------------------------------------- 38
5-2-14 Audio amplifier and mute time constant  ----------------------------------------------------------------------------- 38
5-2-15 I2C-bus transceiver and MAD (module address)  ------------------------------------------------------------------- 39
5-2-16 Internal voltage stabilizer  ---------------------------------------------------------------------------------------------- 39

5-3 Video - VCT description ------------------------------------------------------------------------------------------------------ 39

5-3-1 Introduction  ---------------------------------------------------------------------------------------------------------------- 39
5-3-2 Video Front-end  ----------------------------------------------------------------------------------------------------------- 39
5-3-3 Input Selector -------------------------------------------------------------------------------------------------------------- 39
5-3-4 Clamping  ------------------------------------------------------------------------------------------------------------------- 39
5-3-5 Automatic Gain control  -------------------------------------------------------------------------------------------------- 39
5-3-6 Digitally Controlled Clock Oscillator  ---------------------------------------------------------------------------------- 39
5-3-7 Analogue Video Output  -------------------------------------------------------------------------------------------------- 39
5-3-8 Adaptive Comb Filter (VCT3834A only)  ----------------------------------------------------------------------------- 40
5-3-9 Color Decoder  ------------------------------------------------------------------------------------------------------------- 40
5-3-10 Horizontal Scaler (VCT3834A only)  --------------------------------------------------------------------------------- 40
5-3-11 Video Sync Processing -------------------------------------------------------------------------------------------------- 40
5-3-12 Display Processing  ------------------------------------------------------------------------------------------------------ 41
5-3-13 Chroma Transient Improvement --------------------------------------------------------------------------------------- 41