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2. TDA9830 TV sound AM-Demodulator and audio source switch

The TDA9830, a monolithic integrated circuit, is designed for AM-sound demodulation used in L and L’ standard.
The IC provides an audio source selector and also mute switch.

Block Diagram : TDA9830

IC DESCRIPTION

APPENDIX

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Содержание 14C3

Страница 1: ...3W 8 ohm 75 ohm unbalanced off air cannels S cable channels and hyperband Speaker Teletext system Aerial input Channel coverage frequency synthesiser tuning system Tuning system 10 pages memory FASTE...

Страница 2: ...CK DIAGRAM 8 ALIGNMENT INSTRUCTION 9 1 Service mode 9 2 Microcontroller configuration 9 3 TV set Alignment 9 SCHEMATIC DIAGRAM 11 EXPLODED VIEW 11 PRINTED CIRCUIT BOARD 12 SERVICE PARTS LIST 13 1 The...

Страница 3: ...igh potential of the picture tube before handling the tube The picture tube is highly evacuated and if broken glass fragments will be violently expelled 2 If any Fuse in this TV receiver is blown repl...

Страница 4: ...3 Pin EURO SCART SPECIFICATIONS...

Страница 5: ...25 591 25 591 25 591 25 C37 599 25 599 25 599 25 599 25 C38 607 25 607 25 607 25 607 25 C39 615 25 615 25 615 25 615 25 SPECIFICATIONS CH EUROP E CCIR FRANCE GB IRE LAND EAST OIRT C40 623 25 623 25 62...

Страница 6: ...9 287 25 160 00 303 25 287 25 S20 294 25 294 25 S21 303 25 303 25 303 25 SPECIFICATIONS CH EUROP E CCIR FRANCE GB IRE LAND EAST OIRT S22 311 25 311 25 311 25 311 25 S23 319 25 319 25 319 25 319 25 S24...

Страница 7: ...ed in group I Group IV If two or more programs with the same code are found only the strongest or if they have the same level the one with the lowest frequency is listed in group I II or III The other...

Страница 8: ...sorting order is 1 BBC1 2 BBC2 3 ITV 4 CH4 5 CH5 6 NEWS If two or more identical programs same name but different code e g BBC1 and BBC1 Scotland are found the following pro grams in the list will be...

Страница 9: ...8 CIRCUIT BLOCK DIAGRAM...

Страница 10: ...n System Option TV set Alignment 1 G2 alignment Set TV in NORMAL I mode TV in AV mode without video signal Black screen TV preset with WP Red WP Green and WP Blue equal to 32 TV preset with Black R Bl...

Страница 11: ...lope to compensate for vertical distortion 5 Horizontal picture centering Adjust H Shift to have the picture in the center of the screen 7 AGC Adjust the antenna signal level to 70 dB V 2 for Daewoo t...

Страница 12: ...AUDIO VIDEO...

Страница 13: ...11 Mechanical Exploded View...

Страница 14: ...12 PRINTED CIRCUIT BOARD...

Страница 15: ...AC 4KV 4700PF M KX DE1610 C813 CEXF2C101V C ELECTRO 160V RSS 100MF 16X25 TP C814 CEXF2C101V C ELECTRO 160V RSS 100MF 16X25 TP C823 CEXF1E102V C ELECTRO 25V RSS 1000MF 13X20 TP C832 CEXF1E102V C ELECT...

Страница 16: ...CCXB1H472K C CERA 50V B 4700PF K TAPPING C571 CCXB1H821K C CERA 50V B 820PF K TAPPING C585 CCXB1H222K C CERA 50V B 2200PF K TAPPING C590 CXCH1H270J C CERA 50V CH 27PF J TAPPING LOC PART CODE PART NAME...

Страница 17: ...4148 DIODE 1N4148 TAPPING D841 D1N4148 DIODE 1N4148 TAPPING D860 DBYW36 DIODE BYW36 TAPPING D904 DBAV21 DIODE BAV21 TAPPING D905 DBAV21 DIODE BAV21 TAPPING D906 DBAV21 DIODE BAV21 TAPPING DA02 DTZX12C...

Страница 18: ...BON FILM 1 6 15K OHM J R516 RD AZ393J R CARBON FILM 1 6 39K OHM J R517 RD AZ102J R CARBON FILM 1 6 1K OHM J LOC PART CODE PART NAME PART DESCRIPTION R518 RD AZ273J R CARBON FILM 1 6 27K OHM J R520 RD...

Страница 19: ...2Z102K R CARBON COMP 1 2 1K OHM K R915 RC 2Z102K R CARBON COMP 1 2 1K OHM K LOC PART CODE PART NAME PART DESCRIPTION R921 RD AZ102J R CARBON FILM 1 6 1K OHM J R922 RD AZ102J R CARBON FILM 1 6 1K OHM J...

Страница 20: ...AC 250V 0 47 AC 250V 0 47 I101 IC IF TDA9830 X X X R153 R C FILM 2 2K X X X R156 R C FILM 16K X X X R157 R C FILM 5 6K X X X R159 R C FILM 2 2K X X X R160 R C FILM 6 8K X X X R161 R C FILM 1K X X X R...

Страница 21: ...MYT2D364J CMYT2D364J CMYT2D274J CMYT2D364J CMYT2D364J CMYT2D474J CMYT2D304J CMYT2D364J L401 L102 L76 TRL341G L76 L76 L102 L102 L102 58H0000016 58H0000020 58H0000040 58H0000020 58H0000020 58H0000016 58...

Страница 22: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail leesk web dwe co kr TEL 82 2 360 7802 FAX 82 2 360 7877...

Страница 23: ...mplifier and AGC circuit The nominal frequency of the demodulator is tuned to the required frequency 5 5 6 0 6 5 MHz by means of a calibra tion circuit which uses the clock frequency of the microcontr...

Страница 24: ...saturation occurring when signals with a high chroma to burst ratio are received The ACL circuit is designed such that it only reduces the chroma signal and not the burst signal This has the advantage...

Страница 25: ...od the vertical deflection is placed in an overscan position so that the discharge is not visible on the screen 2 IF The TDA9361 TDA9381 has an alignment free IF PLL demodulator The fully integrated o...

Страница 26: ...ont RCA video input The controlling software via I2C bus selects the signal source Video signal from tuner Pin 40 External video External SVHS from SCART The sound source switching is done in the vide...

Страница 27: ...inking and sourcing is active which leads to steep slopes The levels are 0 and Vddp the supply voltage 3 3Volts High impedance This mode can be used for input only operation of the port Special port f...

Страница 28: ...ins via resistors R350 and R351 The differential input voltage is compared with the output current through the deflection coils measured as voltage across R302 which provides internal feed back inform...

Страница 29: ...smoothing the winding volt age which appears between pin 6 and pin 7 of the SMPS transformer As this winding voltage does not increase to the set voltage immediately after the control circuit starts...

Страница 30: ...P volt age 20 5V Vin t Waveform of Vin pin voltage at start up TO PIN4 SM PS 2 3 1 5 GND R804 C850 OCP FB From PIN 6 SM PS FEEDBACK SOURCE R808 DRAIN DRIVE OSC Rg2 Rg1 Comp 2 Comp 1 C1 R1 STR F6653 1...

Страница 31: ...STR F6653 internal resistance R1 So C1 voltage starts falling in accordance to the gradient regulated by the constant dis charging time of C1 and R1 So this means that the fixed time determined by C1...

Страница 32: ...his circuit triggers the latch circuit when the frame temperature of STR F6653 IC exceeds 140 C overvoltage protection circuit OVP This circuit triggers the latch circuit when the Vin voltage exceeds...

Страница 33: ...picture appears on screen I501 IC doesn t provide horizon tal drive voltage Then the microcontroller consults I702 EEPROM via I2C bus to know the last TV set mode normal run mode or stand by mode befo...

Страница 34: ...I501 pin 60 If the DC supply voltage decreases below 3 V Q510 switches off immediately Q511 starts conducting pulling I501 pin 60 high At the same time it discharges the reset capacitor C501 Dischargi...

Страница 35: ...810 is not conducting and no current flows from Q810 collector to the ground Therefore the power circuit diagram is the following one 9 2 1 2 power supply circuit diagram during TV set normal run I820...

Страница 36: ...er supply line IC power supply delivery Remarks 124V 110V FBT FBT supplies 45V to I301 vertical IC FBT supplies 14V to I301 vertical IC FBT supplies 33V to the tuner FBT supplies 185V to I901 video am...

Страница 37: ...hich are conducting In these conditions I801 delivers pulses on light mode and T801 produces voltages with reduced power As I810 is conducting current flows also from pin 16 SMPS transformer to I823 3...

Страница 38: ...band delay line RGB control circuit with Continuous Cathode Calibration white point and black level off set adjustment so that the colour temperature of the dark and the bright parts of the screen ca...

Страница 39: ...colour palette Globally selectable scan lines per row 9 10 13 16 and character matrix 12x10 12xl3 12x16 VxH Fringing Shadow selectable from N S E W direction Fringe colour selectable Meshing of defin...

Страница 40: ...al time capture and decoding for WST Teletext in Hardware to enable optimised microprocessor throughput 10 pages stored On Chip lnventory of transmitted Teletext pages stored in the Transmitted Page T...

Страница 41: ...19 IC DESCRIPTION APPENDIX...

Страница 42: ...ESCRIPTION n u 1 Port 1 3 Not used SCL 2 I2C bus clock line SDA 3 I2C Data line SECAM L out 4 Port 2 0 FM sound PushPull Low AM SECAM L PushPull High AM SECAM L High Impedance OCP 5 Port 3 0 Over Curr...

Страница 43: ...sor CVBS Y 42 external CVBS Y input CHROMA 43 chrominance input SVHS AUDOUT 44 audio out INSSW2 45 2nd RGB insertion input R2IN 46 2nd R input G2IN 47 2nd G input B2IN 48 2nd B input BCLIN 49 beam cur...

Страница 44: ...22 APPENDIX IC DESCRIPTION...

Страница 45: ...nd audio source switch The TDA9830 a monolithic integrated circuit is designed for AM sound demodulation used in L and L standard The IC provides an audio source selector and also mute switch Block Di...

Страница 46: ...t signal n c 2 Not connected CAGC 3 AGC capacitor CREF 4 REF voltage filtering capacitor n c 5 Not connected AMOUT 6 AM demodulator output AMIN 7 Input signal from audio switch AFOUT 8 Output signal f...

Страница 47: ...used in the output stage because of the absence of second breakdown Features Few external components Highly efficient fully DC coupled vertical output bridge circuit Short rise and fall time of the v...

Страница 48: ...ut voltage positive 2 Vi neg input voltage negative 3 Vp supply voltage 4 VOB output voltage B 5 GND ground 6 Vflb flyback supply voltage 7 VOA output voltage A 8 VO guard guard output voltage 9 VM in...

Страница 49: ...Hz for an output signal of 60 Vpp High slew rate of 900V s No external components required Very simple application Single supply voltage of 200V Internal reference voltage of 2 5 V Fixed gain of 50 Bl...

Страница 50: ...ata in and out of the memory Serial Data SDA The SDA pin is bi directional and is used to transfer data in or out of the memory 7 STR F6653 7 1 general description The STR F6653 is an hybrid IC with a...

Страница 51: ...OL DESCRIPTION 1 Overcurrent feedback O C P E B Input of over current detection signal and feedback signal 2 Source S Mosfet source 3 Drain D Mosfet drain 4 Supply VIN Input of power supply for contro...

Страница 52: ...EC O C P F B terminal threshold voltage 1 1 5 VTH 1 0 68 0 73 0 78 V O C P F B terminal threshold voltage 2 1 5 VTH 2 1 3 1 45 1 6 V O C P F B terminal extraction current 1 2 IOCP FB 1 2 1 35 1 5 mA O...

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