Daewoo DTH-29U3 Service Manual Download Page 1

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OTC 2003

CHASSIS : CP-830F

MODEL : DTH-29U3

S/M No.TCN830FEF0

Summary of Contents for DTH-29U3

Page 1: ...OTC 2003 CHASSIS CP 830F MODEL DTH 29U3 S M No TCN830FEF0...

Page 2: ...BALANCE 15 3 4 4 FOCUS 15 3 4 5 VERTICAL GEOMETRY 15 3 4 6 HORIZONTAL PICTURE CENTRING 15 3 4 7 EAST WEST CORRECTION 15 3 4 8 AGC 16 4 IC DESCRIPTION 17 4 1 TELETEXT DECODER WITH EMBEDDED 8 BIT CONTR...

Page 3: ...42 4 10 6 MOSFET ELECTRICAL CHARACTERISTICS 43 5 CP830 CHASSIS DESCRIPTION 44 5 1 BLOCK DIAGRAM 44 5 2 IF SECTION 45 5 2 1 BLOCK DIAGRAM 45 5 2 2 VISION IF AMPLIFIER 46 5 2 3 TUNER AND VIF AGC 46 5 2...

Page 4: ...53 5 4 3PORTS 53 5 4 4 CONTROLLER I O PIN CONFIGURATION AND FUNCTION TABLE 53 5 4 5TUNING 54 5 4 6AUTOMATIC PICTURE FORMAT SWITCHING 54 5 4 6 1 WSS Data 54 5 4 6 2 SCART Pin 8 Data Slow Switching 55 5...

Page 5: ...65 5 10 1 TV START UP OPERATIONS 65 5 10 1 1 Schematic Diagram For Start Up Operations 65 5 10 1 2 TV Start Up And Microcontroller Initialisation 65 5 10 2 TV NORMAL RUN AND STAND BY MODE OPERATIONS 6...

Page 6: ...annel coverage Off air channels S cable channels and hyperband Tuning system frequency synthesiser tuning system Visual screen size 29 68cm Channel indication On Screen Display Program Selection 100 p...

Page 7: ...mon Earth Pin Signal Description Matching value 1 Audio Output Right 0 5 Vrms Impedance 1 k RF 54 Mod 2 Audio Input Right 0 5 Vrms Impedance 10 k 3 Audio Output Left 0 5 Vrms Impedance 1 k RF 54 Mod 4...

Page 8: ...0 C21 471 25 471 25 471 25 471 25 C22 479 25 479 25 479 25 479 25 C23 487 25 487 25 487 25 487 25 C24 495 25 495 25 495 25 495 25 C25 503 25 503 25 503 25503 25 C26 511 25 511 25 511 25 511 25 C27 519...

Page 9: ...C63 807 25 807 25 807 25 807 25 C64 815 25 815 25 815 25 815 25 C65 823 25 823 25 823 25 823 25 C66 831 25 831 25 831 25 831 25 C67 839 25 839 25 839 25 839 25 C68 847 25 847 25 847 25 847 25 C69 855...

Page 10: ...335 25 335 25 S26 343 25 343 25 343 25 343 25 S27 351 25 351 25 351 25 351 25 S28 359 25 359 25 359 25 359 25 S29 367 25 367 25 367 25 367 25 S30 375 25 375 25 375 25 375 25 S31 383 25 383 25 383 25 3...

Page 11: ...rograms found are then sorted in 4 groups Group I It contains all the programs from the selected country and named by the TV controlling software Within this group the sorting order is fixed by the AT...

Page 12: ...are first sweeps all TV bands with Europe system selected negative video modulation and then a second time with France system selected positive video modulation Special case GB Note for satellite rece...

Page 13: ...ing on high voltage equipment Discharge the high potential of the picture tube before handling the tube The picture tube is highly evacuated and if broken glass fragments will be violently expelled If...

Page 14: ...ec Increment the values within range Cycle trough option bits OK key Toggle bits in option byte Order Item Default setting 1 HOR CEN 2 RED GAIN 3 GRN GAIN 4 BLUE GAIN 5 RED BIAS 6 GRN BIAS 7 AGC LEVEL...

Page 15: ...ram list disabled Beam Current Tube mA B2 B1 B0 Nominal Max 0 95 1 10 0 0 0 1 00 1 15 0 0 1 4 3 Super Flat 16 9 Super Flat 1 05 1 20 0 1 0 1 10 1 25 0 1 1 1 20 1 35 1 0 0 1 25 1 40 1 0 1 4 3 Real Flat...

Page 16: ...e best resolution on screen 3 4 5 VERTICAL GEOMETRY Adjust V LINEAR linearity S CORRECT S Correction VERT SIZE Vertical amplitude VERT CENT vertical centring to compensate for vertical distortion 3 4...

Page 17: ...hassis See above how to change option bits Adjust the antenna signal level at 64 dB V 2 Tune a colour bar pattern Find the AGC item in service mode Press the key OK on the remote keypad and wait until...

Page 18: ...c The on chip display unit for displaying Level 1 5 teletext data is also used for customer defined on screen displays Internal XRAM consists of 16 Kbytes Device has an internal ROM of 128 Kbytes The...

Page 19: ...ine 3 S SW2 IN Slow switching control for SCART 2 4 S SW2 IN See Microcontroller I O pin configuration 5 S SW1 IN Slow switching control for SCART 1 6 S SW1 IN See Microcontroller I O pin configuratio...

Page 20: ...ut 41 BK OUT OUT Blanking 42 VDD2 5 IN Supply voltage 2 5V 43 VSS IN Ground 0V 44 VDD3 3 IN Input Output 3 3V 45 n c 46 n c 47 n c 48 AGC OUT Tuner TOP adjustment 49 n c 50 n c 51 LED OUT High Green L...

Page 21: ...CG 13 ADCB 14 ADCF 15 ITO656 Decoder 41 CLKF20 CLKB36 CLKF2PAD CVBS Frontend 4 4 6 7 8 RBB Frontend Clock generation 9 10 11 Soft mix 30 Channel mix 31 Sample tate Converter 33 34 Output Data Controll...

Page 22: ...gnal Not used in this chassis Scaling factors 3 2 pixel resolution 0 75 including 16 9 compatibility 5 zone panorama generator Embedded memory On chip memory controller Embedded DRAM core for field me...

Page 23: ...656 input 78 i656i2 I 656 input 77 i656i1 I 656 input 76 i656i0 I 656 input LSB 75 i656iclk I 656 input clock 39 Rin1 I R in 1 40 Gin1 I G in 1 41 Bin1 I B in 1 37 Fbl1 I Fast Blank input 1 46 Rin2 I...

Page 24: ...3V pad 26 Vssp3 S Supply voltage for digital 0V pad 71 Tclk I Testclock Connect to vss 18 H50 O Hout 50 Hz 20 V50 O Vout 50 Hz 32 656io0 I O Digital input output LSB 31 656io1 I O Digital input outpu...

Page 25: ...ON Video Processing linear horizontal scaling 0 25 4 as well as nonlinear horizontal scaling panorama vision dynamic black level expander luma sharpness enhancement by dynamic peaking and luma transie...

Page 26: ...l flexibility for any amplitude characteristic High speed10 bit D A converters are used to convert digital RGB to analog signals Separate 9 bit D A converters control brightness and cutoff For picture...

Page 27: ...Enable 18 FIFOWR O FIFO Write Enable 19 FIFORWR O FIFO Write Counter Reset 20 PWM1 O I2C controlled DAC 21 PWM2 O I2C controlled DAC Tilt output 22 PWMV O I2C controlled DAC 23 HOUT O Horizontal driv...

Page 28: ...put 55 RIN2 PR I Analog Red2 input PR Input 56 GIN2 Y I Analog Green2 input Y Input 57 BIN2 PB I Analog Blue2 input PB Input 58 ASG2 S Analog Shield Ground 59 HCS I Half Contrast 60 NC 61 TEST I 62 RE...

Page 29: ...standards Precise bit error rate indication Automatic switching from NICAM to FM AM or vice versa Improved NICAM synchronisation algorithm Improved carrier mute algorithm Improved AM demodulation Redu...

Page 30: ...g follows the format of the socalled Near Instantaneous Companding System NICAM 728 Transmission is performed using Differential Quadrature Phase Shift Keying DQPSK Table below offers an overview of t...

Page 31: ...in connections and short description Pin No Pin Name Type Short description 1 NC Not Connected 2 NC Not Connected 3 NC Not Connected 4 INT Out Interrupt out 5 MUTE Out Mute out 6 ADR_SEL In I2C bus Ad...

Page 32: ...itor AUX 39 AHVSUP Analog power supply 8 0V 40 CAPL_M Volume capacitor MAIN 41 AHVSS Analog ground 42 AGNDC Analog reference voltage high voltage part 43 NC Not Connected 44 NC Not Connected 45 NC Not...

Page 33: ...ction and for positive modulation peak white black level detector Tuner AGC with adjustable take over point Alignment free quasi parallel sound QPS mixer for FM NICAM sound IF signals Intercarrier out...

Page 34: ...VIF amp Loop filter comp optional 4 9 16 AM det FM det 25 24 17 Cref 23 13 22 19 6 7 8 15 11 10 27 28 3 1 2 SIF 1 CAGC 5 Standard Video det VIF CAGC CBL AGC VIF Tuner AGC AGC SIF Tuner SIF 2 SIF input...

Page 35: ...standby current High supply voltage ripple rejection Outputs short circuit protected to ground supply and across the load Thermally protected Pin description Pin Symbol Description 1 OUT1 negative lo...

Page 36: ...Low Voltage DMOS process that combines Bipolar CMOS and DMOS devices MOS transistors are used in the output stage because of the absence of second breakdown 4 7 1 TDA8357J Features Few external compo...

Page 37: ...7 8 9 TDA8357J Pin Symbol Description 1 Vi pos input 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 outpu...

Page 38: ...s Highly efficient fully DC coupled vertical output bridge circuit Short rise and fall time of the vertical flyback switch Guard circuit Temperature thermal protection High EMC because of common mode...

Page 39: ...Vo guard VM lcomp 1 2 3 4 5 6 7 8 9 10 11 12 13 TDA8357J Icomp V0 guard Vp 9 3 M5 D3 D2 10 M2 M4 M1 5 2 Vi diff Vi sb Vi diff Vi diff Vi sb Vi diff IiEW top IiEW bot Vi neg 1 input feedback Vi neg Vi...

Page 40: ...utput signal of 60 Vpp High slew rate of 900V No external components required Very simple application Single supply voltage of 200V Internal reference voltage of 2 5 V Fixed gain of 50 Black current s...

Page 41: ...utput 6 SCL Serial clock 7 WC Write control 8 Vcc Supply voltage 4 Vss Ground The memory device is compatible with the I2C memory standard This is a two wire serial interface that uses a bi directiona...

Page 42: ...d control IC designed for flyback converter type switch mode power supply applications 4 10 2 FEATURES Small SIP fully isolated moulded 5 pins package Many protection functions Pulse by pulse overcurr...

Page 43: ...voltage 4 5 VIN off 9 10 111 V Circuit current in operation 4 5 IIN on 30 mA Circ current in non operation 4 5 IIN off 100 Maximum off time TOFF 45 55 SEC max Minimum time for input of 1 5 TTH 2 1 0...

Page 44: ...ARACTERISTICS DESCRIPTION IC PIN SYMBOL RATING NUMBER MIN TYPE MAX UNIT Drain to source break down voltage 3 2 VDSS 650 V Drain leakage current 3 2 IDSS 300 On resistance 3 2 RDS on 1 95 Switching tim...

Page 45: ...CP830F Service Manual 44 5 CP830 CHASSIS DESCRIPTION 5 1 BLOCK DIAGRAM...

Page 46: ...CP830F Service Manual 45 5 2 IF SECTION 5 2 1 BLOCK DIAGRAM...

Page 47: ...vent of decreasing VIF input signal The control voltage AGC voltage at Pin 8 is transferred to an internal control signal and is fed to the tuner AGC to generate the tuner AGC current at Pin 11 open c...

Page 48: ...or NICAM carrier is converted to the intercarrier frequency by the regenerated picture carrier quadrature signal which is provided from the VCO The intercarrier signal is fed via an output amplifier t...

Page 49: ...l as SECAM signals with automatic standard detection The TV controller software has configured the colour decoder to operate in automatic detection mode When the signal source comes from the tuner onl...

Page 50: ...r Cb multiplexed with separate H V syncs and clock ITU R 656 format The data inputs Y0 Y7 and C0 C7 are clocked with the external clock LLC2 The clock frequency is 54 MHz for 8 bit data input The hori...

Page 51: ...essing The contour correction signal calculated in this block is limited to the adjacent extreme values to prevent over and undershoots The LTI features an adjustable gain control and an adjustable co...

Page 52: ...ds on the fast blank input signal 5 3 2 12 CRT Measurement and Control In order to define accurate colour on different CRT displays the cut off and white drive settings are adjusted in factory dependi...

Page 53: ...zation and Deflection The deflection processing generates the signals for the horizontal and vertical drive This block contains two numeric phase locked loops and a security unit PLL2 generates the ho...

Page 54: ...ON TABLE PIN NAME CONFIGURATION DESCRIPTION STAND BY TV ON 3 S SW2 Open Drain Open Drain 4 S SW2 Open Drain Open Drain 5 S SW1 Open Drain Open Drain 6 S SW1 Open Drain Open Drain 8 RESET out Low Open...

Page 55: ...94 The voltage level from SCART 1 or SCART 2 pin 8 slow switching 5 4 6 1 WSS Data This digital signal is a received at the beginning of line 23 in each frame It is not a teletext signal but the contr...

Page 56: ...16 9 MEDIUM FULL SCREEN 16 9 The SCART 1 signal SSW1 has priority over SSW2 5 4 6 3 Picture Format Description From the information collected from the above sources is the input from which the TV must...

Page 57: ...x width and height format with 430 active lines FULL SCREEN 100 100 Picture is displayed filling the full screen Standard 16 9 picture with width and height 576 active lines PANORAMA 100 100 Picture i...

Page 58: ...d by compressing the vertical size FULL SCREEN 100 100 Picture is displayed filling Standard 4 3 picture the full screen width and with 576 active lines height WATERGLASS 100 100 Picture is displayed...

Page 59: ...ly performed by the television being to either ENABLE or DISABLE F SW 1 5 4 8 OVER CURRENT PROTECTION In case of overload the SMPS secondary voltages will drop The voltage on pin 18 of microcontroller...

Page 60: ...East Euro Bulgarian 0 0 0 English Russian Cyrillic 0 0 1 German German West Euro 0 1 0 Estonian Estonian East Euro 0 1 1 Lettish Lettish East Euro 1 0 0 Russian English Cyrillic 1 0 1 Ukrainian Englis...

Page 61: ...switching the threshold levels mono to stereo and stereo to mono is different When the sound mode change the MSP firmware informs the microcontroller by rising pin 4 This generates an interrupt to th...

Page 62: ...principle of operation with two supply voltages class G makes it possible to fix the supply voltage Vp optimum for the scan voltage and the second supply voltage Vflb optimum for the flyback voltage...

Page 63: ...h appears between pin6 and pin7 of the SMPS transformer As this winding voltage does not increase to the set voltage immediately after the control circuit starts operating VIN starts dropping However...

Page 64: ...CP830F Service Manual 63 5 9 2 2 STR F6654 Oscillating Operation...

Page 65: ...e with the gradient regulated by the constant discharging time of C1 and R1 So this means that the fixed time determined by C1 and R1 is the OFF time of the MOSFET When C1 voltage falls to around 3 7V...

Page 66: ...W801 power switch is pushed main AC voltage is applied to T801 transformer after rectification by D801 D804 diodes Then T801 SMPS transformer starts operating and supplies DC voltage to I823 5V regula...

Page 67: ...If the TV set was on normal run mode before switching off the microcontroller delivers horizontal drive voltage at pin 23 on the I502 and picture appears on screen If the TV set was on stand by mode...

Page 68: ...n remote control commands I701 microcontroller part pin 52 power is set to high for normal run mode low for stand by mode 5 10 2 1 TV On Normal Run Mode 5 10 2 1 1 I701 microcontroller part pin 52 pow...

Page 69: ...te pin is set to low no conducting So current from 10V DC voltage from T801 SMPS transformer pin 13 does not flow through Q811 and Q810 transistors but flows through I806 IC error amplifier Q809 is co...

Page 70: ...823 resistor has been chosen to reach exact DC voltage required on this line 130V supply voltage line includes an IC error amplifier I806 which corrects unexpected DC voltage variations on this line 5...

Page 71: ...CP830F Service Manual 70 I826 2 5 3 3 R817 2 5V I701 MICOM 2 5V 3 3V 52 23 12 3 4 11 17 5 10 2 2 TV Set On Stand By Mode 5 10 2 2 1 TV set circuit diagram on stand by mode...

Page 72: ...lows from pin 16 SMPS transformer to the ground via I804 optocoupler and Q810 and Q811 transistors which are conducting In these conditions I801 delivers pulses on light mode and T801 produces voltage...

Page 73: ...RSS 220MF 10X16 TP C118 CMXL1J474J C MYLAR 63V 0 47MF MKT C404 CMYH3C113J C MYLAR 1 6KV 0 011MF J C405 CMYE2J183J C MYLAR 630V PU 0 018MF J C408 CMYE2G334J C MYLAR 400V 0 33MF J C415 CEXF2E100V C ELE...

Page 74: ...300 EYE LET BSR T0 2 R1 6 E52 4856310600 EYE LET BSR 2 3 R2 3 E53 4856310600 EYE LET BSR 2 3 R2 3 E54 4856310300 EYE LET BSR T0 2 R1 6 E55 4856310300 EYE LET BSR T0 2 R1 6 E56 4856310300 EYE LET BSR T...

Page 75: ...RC179 HRFT222JCA R CHIP 1 10 2 2K OHM J 2012 RC501 HRFT101JCA R CHIP 1 10 100 OHM J 2012 RC506 HRFT750JCA R CHIP 1 10 75 OHM J 2012 RC513 HRFT103JCA R CHIP 1 10 10K OHM J 2012 RC516 HRFT471JCA R CHIP...

Page 76: ...50V F 0 047MF Z TAPPING C808 CEXF1H479V C ELECTRO 50V RSS 4 7MF 5 11 TP C809 CCXB1H102K C CERA 50V B 1000PF K TAPPING C821 CCXB1H102K C CERA 50V B 1000PF K TAPPING C824 CCXB3A471K C CERA 1KV B 470PF...

Page 77: ...WIRE COPPER AWG22 1 0 65 TIN COATING J220 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J232 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J234 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J235...

Page 78: ...RE COPPER AWG22 1 0 65 TIN COATING J460 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J483 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J488 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J889 8...

Page 79: ...7K OHM J R781 RD AZ332J R CARBON FILM 1 6 3 3K OHM J R786 RD AZ103J R CARBON FILM 1 6 10K OHM J R787 RD AZ103J R CARBON FILM 1 6 10K OHM J R788 RD AZ103J R CARBON FILM 1 6 10K OHM J R789 RD AZ103J R...

Page 80: ...1 2 1K OHM J ZZ140 PTPKCPH29U7FLS PACKING AS DTH 29U7FLF S M681 2TP06575CL TAPE OPP T0 065XW75X500M CLEAR M801 GPBBW6U7022 BOX DTF 29U7 M811 4858101500UP PAD UP 29U7 M811A 4858101500DN PAD DOWN 29U7...

Page 81: ...80 CP830F Service Manual 7 EXPLODED VIEW 7 1 DTH 29U7...

Page 82: ...81 9 SCHEMATIC DIAGRAM CP830F Service Manual...

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