Daewoo DTQ-14J4FC Service Manual Download

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ROUBLESHOOTING GUIDE

7. NO ON-SCREEN DISPLAY

8. REMOTE CONTROL DOES NOT OPERATE

I701

MICOM

XC701

32.768KHz

#10

#11 #12

ST-BY

Check

the crystal

IL701

Remote Control

PREAMP

ST-BY

GND

#34

OUT

Check

the waveform

I701

MICOM

XC701

32.768KHz

#10

#11 #12

ST-BY

Check

the crystal

#24

#25

SDA

SCL

I101

#16

#17

Check

clock/data signal

#20

#21

V.SYNC IN

H.SYNC IN

Check

the signal (60Hz)

Check

the signal (15,734Hz)

#23

#22

OSD R

OSD G

OSD B

BLANK

#15

#14

Check

OSD R/G/B/BLANK signal

If OSD does not operate,
then change the I701

Summary of Contents for DTQ-14J4FC

Page 1: ...http svc dwe co kr DTQ 14J4FCA B13103D DTQ 14J4FCC B113A01L DTQ 20J4FC B19A02D Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if...

Page 2: ...SPECIFICATIONS 5 BLOCK DIAGRAM 6 ALIGNMENT INSTRUCTIONS 7 SERVICE MODE ADJUSTMENTS 7 ASSEMBLY ADJUSTMENTS 8 IC DESCRIPTION 12 TROUBLE SHOOTING CHARTS 21 NO POWER 21 NO PICTURE 22 NO SOUND 23 CH DON T...

Page 3: ...PICTURE TUBE HOWEVER THIS TUBE DOES NOT EMIT X RAYS WHEN THE HIGH VOLT AGE IS AT THE FACTORY SPECIFIED LEVEL THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC OPERATION AT HIGHER VOLT AGES MAY CA...

Page 4: ...ck hazard and must be corrected imme diately GRAPHIC SYMBOLS The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of unin...

Page 5: ...4 Wall and shelf mounted installations using a commercial mounting kit must follow the factory approved mounting instructions A receiver mounted to a shelf or platform must retain its original feet o...

Page 6: ...1 3 W SPEAKER 3 W 8 ohm ANTENNA INPUT IMPEDANCE 75 ohm Unbalanced AUXILIARY INPUT TERMINAL Front Video Audio Rear Video Audio INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency 45 75 MHz Sound IF C...

Page 7: ...PLL DEMOD AGC AFT IF VCC 5V Z501 TRAP 4 5MHz L501 VCO VOIL 49 48 CHROMA LUMINANCE PROCESS HORIZONTAL VERTICAL PROCESS 46 44 ABL 13 VIDEO VER VCC 5V 43 EXT V IN 42 X RAY 34 19 20 21 RED GREEN BLUE 1 2...

Page 8: ...into the red Press the volume up or down button to enter in the service mode you wish to adjust 2 How to memorize the adjusted values in the service mode Must press DISPLAY button the state which the...

Page 9: ...SI 0 63 Align vertical DC bias using internal cross pattern S7 Vertical Size V SIZE 0 127 Align vertical amplitude using internal cross pattern S7 NO SD POWER OFF YES Automatically turn off in 15min f...

Page 10: ...lume up or down button the screen is changing like this Using the volume up or down button select internal cross pattern Select service adjustment S6 You can see the OSD as shown in below 4 1 Horizont...

Page 11: ...ume down adjust service adjustment data of RD GD BD and RB GB BB until a good gray scale with normal whites is obtained ALIGNMENT INSTRUCTIONS Press the DISPLAY button to memorize the data 6 DIGITAL P...

Page 12: ...lue to obtain normal brightness level Press the DISPLAY button to memorize the data CONTRAST Fixed value 10 TINT Fixed value 27 COLOR Fixed value 15 7 FACTORY OUTGOING MODE S12 FACT If you select the...

Page 13: ...P84 AN4 P85 AN5 P86 AN6 P87 AN7 RES FILT CVIN VS HS R G B BL I P60 SDA0 P61 SCLK0 P62 SDA1 P63 SCLK1 P70 INT0 P71 INT1 P72 INT2 TOIN P73 INT3 TOIN P00 P01 P02 P03 P04 P05 P06 P07 TV ONLY H CABLE H ST...

Page 14: ...nds of 16 x 32 dot characters used 16K bytes Various characters attributes Character colors 16 colors Character background colors 16 colors Fringe shadow colors 16 colors Full screen colors 16 colors...

Page 15: ...PLL IC Interface FS 181 Channel AIR 2 69CH CABLE 1 125CH AFT Operation Fine Tuning 2 5Fn 2 5MHz AIR CABLE STD HRC IRC Only Cable 5 6CH is that AFT range is cover over broad band 2 5MHzFn 3 5MHz Memor...

Page 16: ...America ENG SPA POR E2PROM Interface I2C Bus Control CH 6 TRAP Function IS 31 PLL IC Band Data Control Byte 2 P3 P0 VHF L 1 VHF H 2 CH6 TRAP 5 IS 31 AIR Cable CH 6 Only UHF 8 5 The Table of Option and...

Page 17: ...16 IC DESCRIPTION 6 Pin Description...

Page 18: ...17 IC DESCRIPTION...

Page 19: ...18 IC DESCRIPTION...

Page 20: ...RGB VCC RED OUTPUT GREEN OUTPUT BLUE OUTPUT B AKB INPUT VERTICAL OUTPUT RAMP ALC FILTER HOR BUS VCC HOR AFC FILTER HORIZONTAL OUTPUT AUDIO OUT FM OUTPUT PIF AGC RF AGC OUT PIF INPUT1 PIF INPUT2 IF GND...

Page 21: ...801 POWER CONTROL MODULE PIN NO DESCRIPTION PIN NO DESCRIPTION 1 GATE DRIVE1 10 12V INPUT 2 OCP 11 POWER CONTROL 3 SOURCE 12 NC 4 GND1 13 GND2 5 GATE 14 133V INPUT 6 GATE DRIVE2 DPM 001 TI KSE 1 2 3 4...

Page 22: ...I101 34 OCP TUNER 33V R820 DR TRNS B 45V SOUND B 12V R817 R818 D812 5 6Vz Q805 C706 ST BY 5V 133V Q801 FET S R809 R802 G R803 D L802 C805 R804 Check F801 125V 4A Check D801 PBS208GU Check R801 7W 2 2...

Page 23: ...4 AFT 27 28 SDA SCL I101 SF101 SAW FILTER 5 6 10 8 11 12 Check IF Vcc 5V Check clock data signal Check clock data signal 3 4 Check IF AGC voltage Check RF AGC voltage 46 44 Z501 4 5M Trap Check the wa...

Page 24: ...28 SDA SCL I101 SF101 SAW FILTER 5 6 10 8 11 12 Check IF Vcc 5V Check clock data signal 3 Check IF AGC voltage e I601 TDA7267A 1 4 f 52 54 Check SIF output signal If no signal then change I101 Check S...

Page 25: ...I701 MICOM 11 12 29 30 T DATA T CLOCK 5V 33V IF OUT 14 AFT 27 28 SDA SCL h AGC IN XC701 32 768KHz 10 ST BY 5V Check the crystal I703 EEPROM 8 ST BY 5V 5 6 SDA SCL Check SDA SCL Check 5V 33V LINE 15 C1...

Page 26: ...19 20 21 RGB Vcc 9V Check the voltage R OUT G OUT B OUT Check R G B signal 43 Video Chroma Deflection Vcc Check the voltage X502 24 C507 C508 V RAMP ALC filter 5V Check the voltage 2 5V I301 LA7841 23...

Page 27: ...ote Control PREAMP ST BY 5V GND 34 OUT Check the waveform I701 MICOM XC701 32 768KHz 10 11 12 ST BY 5V Check the crystal 24 25 SDA SCL I101 16 17 Check clock data signal 20 21 V SYNC IN H SYNC IN Chec...

Page 28: ...X DE1610 C881 CH2AEE102M C CERA AC 2 5KV 1000PF M MX DE1310 D801 DD2SB80 DIODE BRIDGE D2SB80 F801 5F1GB4021L FUSE GLASS TUBE UL CSA TL 4A 125V MF51 I101 1DCT814B IC CHROMA DCT814B I301 PTC2SW7101 HEAT...

Page 29: ...6 8K OHM J 2012 RC359 HRFT273JCA R CHIP 1 10 27K OHM J 2012 RC360 HRFT333JCA R CHIP 1 10 33K OHM J 2012 RC361 HRFT222JCA R CHIP 1 10 2 2K OHM J 2012 LOC PART CODE PRAT NAME DESCRIPTION RC362 HRFT113J...

Page 30: ...PJBH411 PCB MAIN M 10 AS DTQ 14J4FCA LOC PART CODE PRAT NAME DESCRIPTION 10 2TM18006BE TAPE MASKING 6 2X500 P601 485923162S CONN WAFER YW025 03 STICK R601 RS01Z688J R M OXIDE FILM 1W 0 68 OHM J R804 R...

Page 31: ...M 1W 120K OHM J SMALL SW701 5S50101090 SW TACT THVH472GCA SW702 5S50101090 SW TACT THVH472GCA LOC PART CODE PRAT NAME DESCRIPTION SW703 5S50101090 SW TACT THVH472GCA SW704 5S50101090 SW TACT THVH472GC...

Page 32: ...COATING J073 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J074 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J075 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING JL01 85801065GY WIRE COPPER AWG22...

Page 33: ...10 0 OHM 2012 1 0 JCE01 HRFT000 CA R CHIP 1 10 0 OHM 2012 0 1 JCV01 HRFT000 CA R CHIP 1 10 0 OHM 2012 0 1 JP02 4859109950 JACK PIN BOARD PH JB 9710A 1 0 M201 4852072400 MASK FRONT FR HIPS BK CORE 1A...

Page 34: ...K104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 0 1 CRT1 PTRTPWH394 CRT AS NTSC 14 ITC CRT AS 1 0 CRT1 PTRTPWJ666 CRT AS NTSC 20 ITC CRT AS 0 1 DA01 D1N4148 DIODE 1N4148 TAPPING 1 0 JCA01 HRFT000 CA R CHIP 1...

Page 35: ...1 10 100K OHM J 2012 1 0 RCA03 HRFT750JCA R CHIP 1 10 75 OHM J 2012 1 0 RCA04 HRFT101JCA R CHIP 1 10 100 OHM J 2012 1 0 RCA05 HRFT224JCA R CHIP 1 10 220K OHM J 2012 1 0 RCA06 HRFT392JCA R CHIP 1 10 3...

Page 36: ...710A 1 0 JP02 4859110550 JACK PIN BOARD YS01 9901 0 1 M201 4852072401 MASK FRONT FR HIPS BK CORE 1B 1 0 M201 4852072402 MASK FRONT PC CL 0 1 M211 4852154200 COVER BACK FR HIPS BK 1 0 M211 4852154202 C...

Page 37: ...36 EXPLODED VIEW 1 DTQ 14J4FC...

Page 38: ...37 EXPLODED VIEW 2 DTQ 14J4FCA...

Page 39: ...38 EXPLODED VIEW 3 DTQ 14J4FCC...

Page 40: ...EXPLODED VIEW 4 DTQ 20J4FC 39...

Page 41: ...40...

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 E mail djkoo web dwe co kr TEL 82 2 360 7806 FAX 82 2 360 7877...

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