Daewoo DTR-14D3VG Service Manual Download

Page: 52 / 73

3. NO VERTICAL SCANING(ONE HORIZONTAL LINE ON SCREEN)

CHECK / REPLACE

P401 & DY

¤Ø

]

CHECK VERTICAL Vcc

+16.5V AT PIN3

& +48V AT PIN6

OF I301(TDA 8356)

CHECK SIGNAL

AT PIN1 & PIN2

OF I301 [REFER TO

WAVEFORM

§ §

]

CHECK / REPLACE

D401(RGP 15J)
D409(RGP 15J)

R303(1W 15K)

CHECK / REPLACE

R304, R305
C304, R307

CHECK SIGNAL
AT PIN7 OF I301

CHECK / REPLACE

CRT

CHECK OUTPUT

WAVEFORM AT PIN46,

PIN47 OF I501

CHECK / REPLACE

I301

CHECK / REPLACE

I501

NORMAL

ABNORMAL

Summary of Contents for DTR-14D3VG

Page 1: ...21D3VGW DTR 21D3TGW DAEWOO ELECTRONICS CO LTD S M No CP490P 010 Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need the la...

Page 2: ...k Diagram 3 Alignment Instructions 4 IC Description 8 Circuit Description 34 Trouble Shooting Charts 49 Electrical Parts List 56 CP 490 each model Parts List 62 Mechanical Exploded View and Parts List...

Page 3: ...em Memory channel 100 channels Reception VHF L CH2 CH4 channel Unit VHF H CH5 CH12 Cable Band CHS1 CHS3 CHS1 CHS20 UHF CH21 CH69 Remote control VG R 28B04 TM R 28B03 Screen size 14 34cm A34JLL 90 02 2...

Page 4: ...hock hazard from the receiver 1 Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment 2 Always discharge the...

Page 5: ...3 Circuit Block Diagram...

Page 6: ...ATCH without SOUND CARRIER 2 Connect a OSCILLOSCOPE Bandwidth 100MHz PROBE to P101 TUNER IF OUTPUT 3 Use AGC UP DOWN KEY to obtain an envelop amplitude 200 20 mVp p 3 SCREEN 1 Receive the color bar pa...

Page 7: ...a RETMA PATTERN signal 2 Set the TV to NOR I mode 3 Adjust the upper part of the picture with the V SIZE UP DOWN keys 6 3 VERTICAL SLOPE The VERTICAL SIZE adjustment has to be done in advance 1 Apply...

Page 8: ...Option data has to be changed and all alignment function has to be readjusted The initial state of adjustment are as follows V Center V Slope V Size H Center R G B AFT Center 30 64 33 64 S Correction...

Page 9: ...supports field programmable 32KB system ROM ICE Chip Z90239 is used in Z90239 Emulator and ProtoPaK As described above Z90233 supports 16KB system ROM and Z90234 supports 24KB system ROM for mask The...

Page 10: ...8 3 Block Diagram...

Page 11: ...Infra Red remote capture input I I IRIN 1 14 bit Pulse Width Modulator output O I PWM11 1 20 19 18 17 2 3 4 5 6 7 6 bit Pulse Width Modulator output O I PWM 10 1 1 7 6 5 4 3 2 1 Bit programmable Input...

Page 12: ...BI RAM buffer Acquisition of packets X 26 X 27 8 30 firmware Assistance of all relevant checks firmware 1 bit framing code error tolerance switchable Display Features selectable via special function r...

Page 13: ...access via MOVX for SDA 5250 SDA 5254 and SDA 5255 6 channel 8 bit pulse width modulation unit 2 channel 14 bit pulse width modulation unit 4 multiplexed ADC inputs with 8 bit resolution One 8 bit I...

Page 14: ...12 4 Pin Configuration P SDIP 52 1 ROM Versions Pin Configuration P SDIP 52 1 ROM Versions top view...

Page 15: ...ARRAY 4X256X8 PAGE LATCHES SENSE AMP R W CONTROL HV GENERATOR YDEC Single supply with operation down to 2 5V Low power CMOS technology 1mA active current typical 10 A standby current typical at 5 5V 5...

Page 16: ...andpass filters with switchable centre frequency auto calibrated Asymmetrical peaking circuit in the luminance channel with switchable noise coring function Black stretching of non standard CVBS or lu...

Page 17: ...15 All automatic controls have an option for forced mode Power consumption Low power consumption Packaging SDIP 56 Shrinked Dual In Line Package 56 pins 3 Block Diagram...

Page 18: ...th positive and negative modulated signals 6 IF VIDEO OUTPUT Although the video output impedance is low it is recommended to avoid high frequency current in the output due to for instance sound trap f...

Page 19: ...ctively 21 RED OUTPUT For nominal signals i e CVBS S VHS TXT inputs and for nominal control settings then the RGB output Signal amplitudes is typically 2VBLACK_WHITE 22 V GUARD INPUT Vertical Guard BE...

Page 20: ...which these output signals are connected to 33 SUBCARRIER The reference output can be used as a reference for comb filter applications Reference output Fsc For PCB layout considerations a short signal...

Page 21: ...d start burstkey pulse ref PHI 2 must be 17 s Flash protection A flash protection becomes active when this pin is forced 6V The horizontal drive is switched off immediately Once the voltage is 6V the...

Page 22: ...Short connection to the ground SAWTOOTH pin of the TDA884X is required Important For this capacitor a type with good tem CAPACITOR perature behaviour long term stability and low leakage must be chosen...

Page 23: ...ingle supply voltage of 200V Internal protection against positive appearing CRT flash over discharge Protection against ESD Internal 2 5V reference circuit Controllable switch off behavior 3 Block Dia...

Page 24: ...ut Reverse voltage VR 6 V Power dissipation P 70 mW Collector emitter voltage VCEO 35 V Output Emitter collector voltage VECO 6 V Collector current IC 50 mA Collector power dissipation Pc 150 mW Total...

Page 25: ...itch Guard circuit Protection against short circuit of the output pins 7 and 4 short circuit of the output pins to Vp Temperature thermal protection High EMC immunity because of common mode inputs 3 B...

Page 26: ...wer amplifier of TV and Home stereo 2 Features Built in 3ch amplifier High Output power Pout 6W ch Typ Vcc 20V RL 8 f 1kHz THD 10 Low Noise Vno 0 14mVrms Typ Vcc 20V RL 8 Gv 34dB Rg 10k BW 20Hz 20kHz...

Page 27: ...z 50 60 dB Vripple 0dBm Output Noise Voltage Vno Rg 10k 0 14 0 3 mVrms BW 20Hz 20kHz Rg 0 Cross Talk C T Vout 0 775Vrms 0dBm 60 dB Two channels input Muting Threshold VTH OFF Mute ON pin 3 7 4 0 V VTH...

Page 28: ...64dB MIN Typical Application Sound MPX attenuator for TV Radio and mobil receiver 2 General Description The UPC1406HA is a silicon monolithic integrated circuit for sound control e g Volume Balance Th...

Page 29: ...ency compensation reguired No latch up Large common mode and differential voltage range Gain and phase match between amplifiers Internally frequency compensated Low noise input transistors 3 Block Dia...

Page 30: ...00 Input Bias Current IBAIS TA TA MAX 20 500 800 nA TA TA MAX 100 1500 800 Large Signal VO P P 10V Rl 2K 50 200 20 200 Voltage Range NOTE 1 25 15 Common Mode Input 12 13 12 13 Voltage Range NOTE 1 12...

Page 31: ...e protection with a latch Thermal protection with a latch These protection functions are incorporated and can be latched with an external signal 3 Block Diagram 4 Pin Description No of Terminal Symbol...

Page 32: ...Voltage 3 8 2 V Latch 3 2 5 1 5 6 V OVP Operating Voltage 9 2 VIN OVP 9 2 10 7 V Latch Circuit Hold Current 9 2 IH 500 A Latch Circuit off Voltage 9 2 VIN La OFF 2 5 3 1 V MIC Thermal Shutdown Starti...

Page 33: ...l unit for a wide range of applications 3 Pin Description PIN SIGNAL DESCRIPTION 3 P00 2 P01 23 P02 22 P03 Standard I O Port lines generally used for keypad scanning 10 P04 11 P05 14 P06 15 P07 19 P10...

Page 34: ...by a factor 3 AFW bit Tuner A G C The automatic gain control A G C circuit operates on top sync level at negative modulated signals or on peak white level at positive modulation selected by MOD bit Th...

Page 35: ...INC for positive modulation MOD the external sound input is automatically selected for an external AM sound demodulator Volume controlled amplifier The volume control is active for both internal and e...

Page 36: ...e horizontal oscillator is controlled by the PHI 1 loop for synchronisation with the incoming video input signal The calibrator is responsible for the automatic adjustment of the horizontal oscillator...

Page 37: ...horizontal output starts with the double frequency 31 25kHz and with a duty cycle of 75 off Hout high 25 on hout low After about 50ms the frequency is changed to the normal value 15 625kHz and the du...

Page 38: ...25 or 625 lines frame Vertical synchronisation normal above and with anticopy signal below Vertical divider system The divider system uses a counter that delivers the timing for the vertical ramp gene...

Page 39: ...100 A is realised by means of an internal bandgap reference voltage 3 9V and an external resistor 39k This 100 A reference current is used to derive a 16 A current to charge the exter nal capacitor du...

Page 40: ...loop is stabilised when the resonant frequency of the cloche filter is Fsc Fsc VCXO reference signal which is at 4 4MHz or 3 6MHz depending upon which Xtal is selected The chroma bandpass and chroma t...

Page 41: ...ng the burstkey period it generates a VCXO reference signal fVCXO in phaselock with the incoming burst signal fBURST Prior to lock condition the signals fVCSO and fBURST are not synchronous and are pr...

Page 42: ...r and oscillator ensures that the PLL oscillator is locked to the 4 43MHz Xtal frequency during calibration time in the vertical retrace period The SECAM reference voltage generated at pin 16 is regul...

Page 43: ...key period The saturation of the B Y R Y signals is controlled via the I2 C bus SAT The control range is minimal 52dB with a 6dB minimum reserve above nominal refer also to device specification The B...

Page 44: ...be used 2 RGB control RGB processing The selected RGB signals i e composite RGB and Rin Gin Bin are via the I2 C bus controlled on contrast brightness RGB white point adjust one individual control pe...

Page 45: ...tments RGB output stages Looking at the RGB output signals several DC levels can be seen The DC levels of the H and V blanking are 0 5V below nominal black level of the video signal At the end of the...

Page 46: ...DC level and white level exceeds approximately 2 6V at nominal white point settings Then an internal peak white limiter discharge current IPWL of 200 A will flow then VBCL decreases if no capacitor is...

Page 47: ...the above C1 and R1 and the OFF time determined by C2 and R2 shall be respectively the maximum ON time and maximum OFF time of the power transistor R1 and R2 are fixed at specific values by in line f...

Page 48: ...atios to S1 at the same time power shall be supplied to the VIN terminal Pin 9 from d2 winding when the load is light In addition because a voltage at the INH terminal Pin 8 gets lower than VTH1 in ac...

Page 49: ...gnal input is provided for about 10 sec or longer In addition even after the latch circuit start operating the constant voltage regulator Reg circuit is in operation and the circuit current is at high...

Page 50: ...10W 1 0OHM CHECK REPLACE I801 STR S6708 PERIPHERAL COMPONENT CHECK REPLACE I804 PC817 D812 FML G16S R889 2W 56K CHECK POWER SWITCHING VOLTAGE AT PIN 43 OF I701 POWER ON HIGH STAND BY LOW CHECK VOLTAGE...

Page 51: ...PHERAL COMPONENT CHECK REPLACE I501 CHECK WAVEFORM AT PIN 19 20 21 OF I501 CHECK VIDEO SIGNAL AT CATHOD OF CRT REFER TO WAVEFORM CHECK SIGNAL AT PIN 18 OF I501 CHECK REPLACE CRT CHECK VOLTAGE VIDEO B...

Page 52: ...6 CHECK SIGNAL AT PIN1 PIN2 OF I301 REFER TO WAVEFORM CHECK REPLACE D401 RGP 15J D409 RGP 15J R303 1W 15K CHECK REPLACE R304 R305 C304 R307 CHECK SIGNAL AT PIN7 OF I301 CHECK REPLACE CRT CHECK OUTPUT...

Page 53: ...PIN30 OF I501 CHECK REPLACE I501 CHECK REPLACE X501 4 43MHz X TAL X502 3 58MHz X tal REFER TO NO PICTURE CHART CHECK SIGNAL AT PIN19 20 21 OF I501 CHECK VIDEO SIGNAL AT CATHOD OF CRT REFER TO WAVEFOR...

Page 54: ...REFER TO WAVEFORM M CHECK REPLACE R619 C657 Q635 Q640 Q641 D640 I701 CHECK REPLACE TUNER SAW FILTER Q101 Q102 PERI COMP CHECK Q645 Q632 R660 R661 CHECK 12V LINE OF I602 CHECK SIGNAL AT PIN3 7 OF I602...

Page 55: ...PIN7 8 OF I501 NORMAL ABNORMAL ABNORMAL CHECK HORI VER SYNC AT PIN46 45 OF I701 RESPECTIVELY CHECK REPLACE Q304 Q305 VER SYNC R414 D430 HORI SYNC CHECK OSD R G B SIGNAL BLANKING SIGNAL AT PIN 47 48 4...

Page 56: ...HECK PULSE AT COLLECTOR OF Q1 TRANSMITTER BOARD CHECK REPLACE Q1 LED1 TRANSMITTER BOARD CHECK IC1 DHR 001S CHECK REPLACE X1 C1 CHECK REPLACE IC01 TSP1238 CHECK PULSE AT PIN36 OF I701 CHECK REPLACE I70...

Page 57: ...03Z C CERA 25V F 0 01MF Z AXIAL C301 CMXM2A104J C MYLAR 100V 0 1MF J TP C302 CCZB1H181K C CERA 50V B 180PF K AXIAL C303 CCZB1H181K C CERA 50V B 180PF K AXIAL C304 CMXM2A104J C MYLAR 100V 0 1MF J TP C3...

Page 58: ...1 TP C719 CMXL1J334J C MYLAR 63V MEU 0 33MF J TP C720 CCZF1E103Z C CERA 25V F 0 01MF Z AXIAL C721 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C722 CZSL1H390J C CERA 50V SL 39PF J AXIAL LOC PART CODE PAR...

Page 59: ...PART TYPE REMARK I806 1PQ5RS1A IC REGULATOR PQ5RS1A I808 1SE125N IC SE125N I810 PTT2SW6900 HEAT SINK ASS Y 1PQ12RF11 7174300811 I810 1PQ12RF11 IC REGULATOR PQ12RF11 I810A 4857026900 HEAT SINK AL EX I8...

Page 60: ...PING R414 RD 2Z273J R CARBON FILM 1 2 27K OHM J R415 RS02Z209JS R M OXIDE FILM 2W 2 OHM J SMALL R416 RD AZ303J R CARBON FILM 1 6 30K OHM J R417 RD 4Z102J R CARBON FILM 1 4 1K OHM J R418 RD AZ393J R CA...

Page 61: ...1 6 15K OHM J R695 RD 4Z223J R CARBON FILM 1 4 22K OHM J LOC PART CODE PART NAME PART TYPE REMARK R696 RD 2Z152J R CARBON FILM 1 2 1 5K OHM J R697 RD 4Z471J R CARBON FILM 1 4 470 OHM J R701 RD AZ471J...

Page 62: ...000MHZ 30PPM Z501 5PTPS45MB FILTER CERA TPS 4 5MB TRAP Z502 5PXPS5R5MB FILTER CERA TPS5 5MB TF21 TP LOC PART CODE PART NAME PART TYPE REMARK Z503 5PTPS60MB FILTER CERA TPS 6 0MB EFC S6ROME3 Z504 5PTP...

Page 63: ...NONE NONE NONE MTZJ 10C TAPPING DMTZJ10C 5 J180 WIRECOPPER AWG22 1 0 65 NONE NONE NONE NONE TIN COATING 85801065GY 6 J094 WIRECOPPER AWG22 1 0 65 NONE NONE NONE NONE TIN COATING 85801065GY 7 J095 WIRE...

Page 64: ...NONE UPC 1406HA UPC 1406HA 1UPC1406HA 1UPC1406HA 19 I605 IC AMP NONE NONE NONE NONE NONE NONE KA4558 KA4558 1KA4558 1KA4558 20 I701 IC MICOM Z9024106PSC DW5255MB1 Z9024106PSC DW5255MB1 Z9024106PSC DW...

Page 65: ...E18R000E 5XE6R0000C 5XE18R000E 5XE6R0000C 5XE18R000E 30 SP01 WOOFERSYSTEM NONE NONE NONE NONE NONE NONE SS 80A0310W 8 OHM SS 80A0310W 8 OHM 48A8305100 48A8305100 31 SP02 SPEAKERSYSTEM SS 5090F01 SS 58...

Page 66: ...64 1 14D3 Mechanical Exploded View...

Page 67: ...65 2 20D3...

Page 68: ...66 3 21D3...

Page 69: ...67 4 16D3...

Page 70: ...67 Printed Circuit Boards...

Page 71: ...Circuit Schematics CP 490 SCHEMATIC DIAGRAM...

Page 72: ...ENGINEER NOTE...

Page 73: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 T E L 82 2 360 8179 F A X 82 2 360 8184 PRINTED DATE MAY 1999...

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