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Daewoo DTB-21U6, Service Manual

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Daewoo DTB-21U6 Service Manual Download Page 31

9

IC DESCRIPTION                                                              

APPENDIX  

Summary of Contents for DTB-21U6

Page 1: ...play Program selection 100 Programmes RCA jack Audio input and Vidio input ERUO SCART Jack Audio Video and R G B input Auxiliary Outpup Terminal Sloe and fast swtching SVHsin Audio Video jack on front...

Page 2: ...Microcontroller configuration Service mode 5 2 Microcontroller configuration 5 3 TV SET Alignment 6 SCHEMATIC DIAGRAM 7 EXPLODED VIEW 8 PRINTED CIRCUIT BOARD 9 SERVICE PARTS LIST 10 FUNCTIONAL DESCRIP...

Page 3: ...lass fragments will be violently expelled 2 If any Fuse in this TV receiver is blown replace it with the FUSE specified in the Replacement Parts List 3 When replacing a high wattage resistor oxide met...

Page 4: ...edance 75 8 Slow Switching TV 0 to 2V AV 4 5 to 12V Impedance 10k 9 Green Earth 10 N C 11 Green Input 0 7Vpp 0 1V Impedance 75 12 N C 13 Red Earth 14 Blanking Earth 15 Red Input 0 7Vpp 0 1V Impedance...

Page 5: ...CIRCUIT BLOCK DIAGRAM 4...

Page 6: ...iguration Tuner 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 Bla...

Page 7: ...ope 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 68dB V 2 for Daewoo tun...

Page 8: ...SCHEMATIC DIAGRAM 7...

Page 9: ...EXPLODED VIEW DTB 21U6 8...

Page 10: ...PRINTED CIRCUIT BOARD 9...

Page 11: ...7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN SP01B 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN V901 4859634760 CRT A51QDJ279X32 P38 ZZ200 PTFMSJD450 MASK FRONT AS DTD 21U6ME M191 4851945002 BUTTON CTRL...

Page 12: ...1MA8920 4856015601 00001 1MA8920 IC POWER MA8920 0000A 4857031800 HEAT SINK AL EX 0000B 4856015601 SCREW FIX SWM SCP I802 1LTV817C IC PHOTO COUPLER LTV 817C I803 1DP123 IC ERROR AMP DP123 I805 1KA780...

Page 13: ...CEXF2C101V C ELECTRO 160V RSS 100MF 16X25 TP C813 CEXF1E222V C ELECTRO 25V RSS 2200MF 16X25 TP C814 CEXF1E102V C ELECTRO 25V RSS 1000MF 13X20 TP C818 CEXF1C471V C ELECTRO 16V RSS 470MF 8X12 TP C820 C...

Page 14: ...CONN WAFER YW025 04 STICK R303 RS02Z129JS R M OXIDE FILM 2W 1 2 OHM J SMALL R304 RS01Z100J R M OXIDE FILM 1W 10 OHM J TAPPING R305 RS01Z331J R M OXIDE FILM 1W 330 OHM J TAPPING R402 RS01Z249J R M OXID...

Page 15: ...100V C ELECTRO 50V RSS 10MF 5X11 TP C551 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C552 CEXF1E100V C ELECTRO 25V RSS 10MF 5X11 TP C555 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C564 CEXF1E101V C ELECT...

Page 16: ...TKTC3207 TR KTC3207 TP Q403 TKTC3198Y TR KTC3198Y Q501 TKTA1266Y TR KTA1266Y TP Q502 TKTC3198Y TR KTC3198Y Q531 TKTA1266Y TR KTA1266Y TP Q805 TKTC3205Y TR KTC3205Y TP Q807 TKTA1266Y TR KTA1266Y TP Q8...

Page 17: ...N4937G TAPPING D360 DUZ33B DIODE ZENER UZ 33B D361 DUZ33B DIODE ZENER UZ 33B D362 DUZ33B DIODE ZENER UZ 33B D405 D1N4937G DIODE 1N4937G TAPPING D407 D1N4937G DIODE 1N4937G TAPPING D408 D1N4937G DIODE...

Page 18: ...WIRE COPPER AWG22 1 0 65 TIN COATING J017 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J018 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J019 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J02...

Page 19: ...COPPER AWG22 1 0 65 TIN COATING J067 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J068 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J069 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J070 858...

Page 20: ...AZ392J R CARBON FILM 1 6 3 9K OHM J R106 RD AZ101J R CARBON FILM 1 6 100 OHM J R107 RD AZ101J R CARBON FILM 1 6 100 OHM J R120 RD AZ101J R CARBON FILM 1 6 100 OHM J R121 RD 2Z332J R CARBON FILM 1 2 3...

Page 21: ...J R534 RD AZ102J R CARBON FILM 1 6 1K OHM J R535 RD AZ101J R CARBON FILM 1 6 100 OHM J R537 RD AZ101J R CARBON FILM 1 6 100 OHM J R538 RD AZ101J R CARBON FILM 1 6 100 OHM J R539 RD AZ101J R CARBON FIL...

Page 22: ...R CARBON FILM 1 6 100 OHM J RA03 RD AZ101J R CARBON FILM 1 6 100 OHM J RA04 RD AZ101J R CARBON FILM 1 6 100 OHM J RA06 RD AZ750J R CARBON FILM 1 6 75 OHM J RA07 RD AZ390J R CARBON FILM 1 6 39 OHM J RA...

Page 23: ...r 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 calibration circuit which uses the clock frequency of the microcontroller as...

Page 24: ...hen 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 that the colour sensi...

Page 25: ...automatic adjustment of the Vg2d voltage during the production of the TV receiver During switch off of the TV receiver a fixed beam current is generated by the black current control circuit This curre...

Page 26: ...a I2C bus The video processor pin 28 has multiple functions and provides in this applicationbus Deemphasis time constant Audio monitor output External AM input Deemphasis time constant The time consta...

Page 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...

Page 28: ...e 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 can be chosen ind...

Page 29: ...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...

Page 30: ...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...

Page 31: ...9 IC DESCRIPTION APPENDIX...

Page 32: ...ocal key input High impedance S SW 8 ADC 3 Scart Slow switching input VssC P 9 digital ground for controller core and peripheral LED 1 10 port 0 5 8mA current sinking capability LED 2 11 port 0 6 8mA...

Page 33: ...r TV processor 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...

Page 34: ...12 IC DESCRIPTION APPENDIX TDA 9361 OR TDA9381...

Page 35: ...jection Low turn on off pop Stand by mode Decription The device TDA7267A is a new technology Mono Audio Amplifier in Power DIP package specifically designed for TV application Thanks to the fully comp...

Page 36: ...Board Square heat Sink vs Copper Area Example of heatsink using PC board copper Symbol Parameter Value unit Vs Operating Supply Voltage 18 V Io Output Put Peak Current 1 5 A Top Operating Temperature...

Page 37: ...CHARACTERISTICS Tamb 25 C Vs 14 5V RL 8 f 1KHz nuless otherwise specified APPLICATION HINTS For 14 5V supply and 8 speaker application its maximum power dissipation is about 1 8W Assumming that max a...

Page 38: ...t circuit the deflection coils can be DC coupled The IC is constructed in a Low Voltage DMOS process that combines Bipolar CMOS and DMOS devices MOS transistors are used in the output stage because of...

Page 39: ...ge 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 input meas...

Page 40: ...z for an output signal of 60 Vpp High slew rate of 900V s No external components requireds Very simple application Single supply voltage of 200V Internal reference voltage of 2 5 V Fixed gain of 50 Bl...

Page 41: ...a bus and serial clock The memory carries a built in 4 bit unique device type identifier code 1010 in accordance with the I2C bus definition Serial Clock SCL The SCL input is used to strobe all data i...

Page 42: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC...

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