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Daewoo DSC-34W70N Service Manual

Other manuals for DSC-34W70N: User Manual
Manual is about: Daewoo Electronics HDTV Monitor USER MANUAL DSC-34W70N

Summary of DSC-34W70N

  • Page 1

    S/m no. : dsc120bef0 service manual model : dsc-34w70n release 1 hdtv monitor chassis : sc-120 specification power requirement ac 120v, 60hz power consumption 210watts general dimensions(w/h/d) 41”w x 26.2”h x 24.6”d weight 81kg (178.61bs) antenna one 75ohm external input terminal for uhf/vhf/cable ...

  • Page 2: Caution

    - 1 - 1. Product safety 2 2. Specifications 4 3. Remote control overview 5 4. Limited warranty 6 5. Service mode 7 6. General adjustment 10 7. Special adjustment (when replacing new circuits boards) 15 8. Troubleshooting charts 16 9. Parts list 25 10. Circuit diagram 10-1. Power circuit 47 10-2. Mai...

  • Page 3

    1. Product safety servicing guidelines for color television receivers - 2 - caution : do not attempt to modify this product in any way. Unau-thorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or user injury. Service work should...

  • Page 4

    - 3 - subject : implosion 1. All direct viewed picture tubes are equipped with an integral implosion protection system, but care should be taken to avoid damage during installation. Avoid scratching the tube. If scratched, replace it. 2. Use only recommended factory replacement tubes. Subject : tips...

  • Page 5: 2. Specification

    2. Specification - 4 - power requirement ac 120v, 60hz power consumption 210watts general dimensions(w/h/d) 41”w x 26.2”h x 24.6”d weight 81kg (178.61bs) antenna one 75ohm external input terminal for uhf/vhf/cable screen size 34”(diagonal), 16:9 aspect ratio picture display format dtv : 1080i @ 33.7...

  • Page 6: 3. Remote Control Overview

    3. Remote control overview - 5 - the remote control has the following functions: power button press to turn the hdtv monitor (and other equipment) on and off dtv button press this button repeatedly to display hd component video. Tv/video button press to view components you have connected to the hdtv...

  • Page 7: 4. Limited Warranty

    4. Limited warranty - 6 - daewoo electronics corporation of america inc. (also known as deca) warrants this product to be free from defects in material and workmanship and agrees to remedy any such defect. This warranty covers 3 years labor and 3 years parts from the date of original purchase. This ...

  • Page 8: 5. Service Modes

    5. Service modes - 7 - 1. Entering to service mode with the service remote control 2. Function of each service mode 1) s1 : heat run mode. 2) s2 : screen voltage control mode the vertical deflection is down, and a horizontal line appears on the screen. 3) s3 : sound controls mode 4) s4 : video contr...

  • Page 9

    Service modes - 8 - 6) s6 : geometry adjustment mode ntsc/dvd after receiving air or external video, adjust geometry. Dtv after connecting hd component at the dtv input, adjust geometry. 7) s7: pip adjustment • press “pip” button twice until the screen becomes two windows. • adjust below items so th...

  • Page 10

    Service modes - 9 - 10) s10 : option adjustment mode 11) s12 : factory setting 3. Selecting the adjusting items pressing of channel button changes the adjustment items. ( button for reverse order) 4. Adjusting the data pressing of volume button changes the value of data. ( button for reverse order) ...

  • Page 11: 6. General Adjustment

    6. General adjustment - 10 - in the majority of cases, a high definition digital television will need basic adjustments such as high voltage, screen voltage, focus, white balance, sub brightness, and geometry. All adjustments should be performed after heat-running the set for at least 20 minutes. 1....

  • Page 12

    General adjustment - 11 - sub brightness adjustment 1. Tune on retma pattern. 2. Press s9 button. 3. The following osd menu will appear on the screen, and the data are initial values before adjusting. 4. To be between step 10% and 20% on the contrast chart, perform fine adjustment of sub brightness....

  • Page 13: Geometry

    General adjustment - 12 - geometry 1. To adjust v-position, h-size, h-position and so forth, tune on retma pattern. 2. To adjust pincushion, trapezoid and so forth, tune on cross hatch signal. 3. Screen mode should be on 16:9 mode, and the video mode should be on normal mode. 4. Press s6 button to a...

  • Page 14

    Item screen image adjustmant procedure 1) receive ntsc retma signal. 2) the screen mode should be selected on 16:9 v s linearity mode. 3) when the center area of retma signal’s circle is s type in the vertical direction, adjust vs linearity so that vertical interval may be the same. 1) receive ntsc ...

  • Page 15

    General adjustment - 14 - item screen image adjustmant procedure 1) receive ntsc cross hatch signal. 2) the screen mode should be selected on 16:9 mode. Trapezoid 3) when the screen shape is not rectangular but trapezoid, adjust trapezoid to correct the unbalanced shape. 1) there is no need to adjus...

  • Page 16: 7. Special Adjustment

    7. Special adjustment (when replacing new circuit boards) - 15 - 1. Power assembly 1) after replacing a new assembly, x radiation protection circuit test when service has been performed on the horizontal deflection system, high voltage system or b+ system, the x-radiation protection circuit test mus...

  • Page 17: 8. Troubleshooting Charts

    8. Troubleshooting charts - 16 - no picture (ntsc signal) osd is on the screen. No check osd signal of i701. R/g/b osd : #64, 63, and 62 bl osd : #61 check osd signal of uc107. R/g/b osd : #50, 51, and 52 bl osd : #49 check video signal of ia1. Video1 :cvbs to #43, y to #45, and c to #47 video2 :cvb...

  • Page 18

    Troubleshooting charts - 17 - no sound (ntsc signal) check audio signal of ia1. Video1 : l to #44, r to #46 video2 : l to #2, r to #4 video3 : l to #8, r to #10 av signal rf signal check the audio base-band signal to sif of tu01. Check audio signal of uc102. -sif to #67 -rf main l/r to #36, 37 check...

  • Page 19

    Troubleshooting charts - 18 - no raster no i701 communicates with i402 on the iic bus. Check the #3 (sda) and #4 (scl) of i402. 5vp-p check i701 and i402. Vertical deflection check #17 (h-drive output) of i402. 0.7vp-p 31.5khz (ntsc/dvd) 33.75khz (dtv) horizontal deflection high voltage drive check ...

  • Page 20

    Troubleshooting charts - 19 - h/d1 60hz 5vp-p 90v horizontal drive b+ to r481 is 90v 5vp-p if the impedance value of q425's collector is near zero Ω , the horizontal deflection tr (q425) is dead. Replace q425. No end check 200va to pa14m. To no power no h drive signal is output to source of q423. 20...

  • Page 21

    Troubleshooting charts - 20 - hvd1 high voltage drive signal is output to pin 3 of i401. 31.5 / 33.75khz 12vp-p check 200vb to pa14m. To no power no high voltage drive signal is output to source of q407. 31.5 / 33.75khz 200vp-p 60hz 20vp-p 100v fbt b+ to #12 of pw16p is about 100v 20vp-p end check e...

  • Page 22

    Troubleshooting charts - 21 - vertical deflection check i412. No vertical saw waveform is to pin 8 of i412. 2.2vp-p 60hz the following waveform is to pin 1 of i412. 3.5vp-p 0v no check vertical deflection circuits around i412. Check vertical deflection circuits around i412. No end vertical deflectio...

  • Page 23

    Troubleshooting charts - 22 - no power (standby power : i801) the standby led doesn't light up red. Approximately 150vdc is to c806. No check if f801 is open. Check d801 (bridge rectifier). Check if voltages to pw15 is supplied to tv micro-processor(i701). Check the parts caused a short-circuit to s...

  • Page 24

    Troubleshooting charts - 23 - no power switch relay (y802) doesn't operate. No f801 short-circuits. Replace f801. Bridge rectifier (d805) short-circuits. (the voltage of between anode and cathode to d805 is 0.6v). Replace d805. Both ac lines of power cord don't short-circuit. Replace the parts cause...

  • Page 25

    Troubleshooting charts - 24 - no power switch relay operation (y802) is ok. Check the parts caused a short- circuit to secondary circuits. Replace defective parts with a new one. No supply 200va to pw14. R802 is ok. Replacer802. No no r807 and r852 are ok. Replace r807 or r852. No q801, d810 are ok....

  • Page 26: 9. Part List (Dsc-34W70N)

    9. Part list (dsc-34w70n) zz100 49b00r37e- transmitter remocon r-37d08 zz120 pebcshd013 cover back as dsc-3670w m211 4952100800 cover back fr hips paint m353 4853526600 holder cord nylon6(dacb-183) m353a 7172401612 screw tapptite tt2 trs 4x16 mfzn bk m541 4855415800 spec plate 150art p/e film (c/tv)...

  • Page 27

    Ft802 7128301212 screw tapping t2s was 3x12 mfzn bk f801 5f1cd6321m fuse ul/csanm 6.3a 125v ® i801 1t0p224y-- ic audio power top224y ® i801a 4957000701 heat sink al ex i801b 7174300811 screw tapptite tt2 rnd 3x8 mfzn i802 1ltv817c-- ic photo coupler ltv-817c i803 1strs6709- ic power str-s6709 ® i803...

  • Page 28

    E805 4856310600 eye let bsr t0.2 (r2.3) e806 4856310600 eye let bsr t0.2 (r2.3) e807 4856310600 eye let bsr t0.2 (r2.3) e808 4856310600 eye let bsr t0.2 (r2.3) e809 4856310300 eye let bsr t0.2 (r1.6) e810 4856310300 eye let bsr t0.2 (r1.6) e811 4856310300 eye let bsr t0.2 (r1.6) e812 4856310300 eye ...

  • Page 29

    C807 cmxb1h104j c mylar 50v eu 0.1mf j (tp) c808 cexf1e470v c electro 25v rss 47mf (5x11) tp c813 cexf2a100v c electro 100v rss 10mf (6.3x11) tp c817 cexf1e221c c electro 25v rus 220mf (8x11.5) tp c818 cexf1e101v c electro 25v rss 100mf (6.3x11) tp c819 cexf2a100v c electro 100v rss 10mf (6.3x11) tp...

  • Page 30

    J812 85801065gy wire copper awg22 1/0.65 tin coating j813 85801065gy wire copper awg22 1/0.65 tin coating j814 85801065gy wire copper awg22 1/0.65 tin coating j815 85801065gy wire copper awg22 1/0.65 tin coating j816 85801065gy wire copper awg22 1/0.65 tin coating j817 85801065gy wire copper awg22 1...

  • Page 31

    R883 rd-4z102j- r carbon film 1/4 1k ohm j r884 rd-4z229j- r carbon film 1/4 2.2 ohm j r885 rd-4z229j- r carbon film 1/4 2.2 ohm j r886 rd-4z479j- r carbon film 1/4 4.7 ohm j r887 rd-az103j- r carbon film 1/6 10k ohm j r888 rd-az102j- r carbon film 1/6 1k ohm j r889 rd-2z100j- r carbon film 1/2 10 o...

  • Page 32

    Cc210 hcbd684kba c chip cera 10v x7r 0.68mf k 1608 cc211 hcbk683kba c chip cera x7r 50v 0.068mf k 1608 cc212 hcff224zba c chip cera 16v y5v 0.22mf z 1608 cc213 hcbk152kba c chip cera 50v x7r 1500pf k 1608 cc214 hcqk391jba c chip cera 50v ch 390pf j 1608 cc219 hcbh104kba c chip cera 25v x7r 0.1mf k 1...

  • Page 33

    Qc108 t2sa1037kb tr chip 2sa1037k-t146-r qc109 t2sc2412kb tr chip 2sc2412k-t146-br qc110 t2sc2412kb tr chip 2sc2412k-t146-br qc111 t2sc2412kb tr chip 2sc2412k-t146-br qc112 t2sa1037kb tr chip 2sa1037k-t146-r qc113 t2sc2412kb tr chip 2sc2412k-t146-br qc114 t2sc2412kb tr chip 2sc2412k-t146-br rc100 hr...

  • Page 34

    Cc117 hcbd105kba c chip cera 10v x7r 1mf k 1608 cc119 hcejf100mc c electro chip 16v 10mf mv 4052 cc120 hcejf100mc c electro chip 16v 10mf mv 4052 cc125 hcbd105kba c chip cera 10v x7r 1mf k 1608 cc126 hcbh104kba c chip cera 25v x7r 0.1mf k 1608 cc127 hcqk102jba c chip cera 50v ch 1000pf j 1608 cc128 ...

  • Page 35

    Lc106 hffh1h500b f chip ferrite bead hb-1h3216-500jt lc107 hflk5225-c f chip lpf h354lai-k5225=p3 lc112 hlc339k02b l chip coil 3.3uh mlf 1608 lc114 hlc339k02b l chip coil 3.3uh mlf 1608 lc120 hlc229k02b l chip coil 2.2uh mlf 1608 lc121 hlc229k02b l chip coil 2.2uh mlf 1608 lc122 hlc229k02b l chip co...

  • Page 36

    Dca03 dbav99l—b diode chip bav99l dca04 dbav99l—b diode chip bav99l dca05 dbav99l—b diode chip bav99l dca06 dbav99l—b diode chip bav99l dca07 dbav99l—b diode chip bav99l dca08 dbav99l—b diode chip bav99l dca11 dbav99l—b diode chip bav99l dca12 dbav99l—b diode chip bav99l dca13 dbav99l—b diode chip b...

  • Page 37

    Rca80 hrft473jba r chip 1/10 47k ohm j 1608 rca81 hrft473jba r chip 1/10 47k ohm j 1608 rca82 hrft223jba r chip 1/10 22k ohm j 1608 rca83 hrft472jba r chip 1/10 4.7k ohm j 1608 rca84 hrft104jba r chip 1/10 100k ohm j 1608 rca85 hrft104jba r chip 1/10 100k ohm j 1608 rca86 hrft101jba r chip 1/10 100 ...

  • Page 38

    Q506 t2sc4793— tr 2sc4793 ® q506a 4857027802 heat sink al ex q506b 7174300811 screw tapptite tt2 rnd 3x8 mfzn r507 rs01z104j- r m-oxide film 1w 100k ohm j (tapping) r510 rs01z104j- r m-oxide film 1w 100k ohm j (tapping) r517 rs01z104j- r m-oxide film 1w 100k ohm j (tapping) r522 rv6128206- r semi fi...

  • Page 39

    Ju02 85801065gy wire copper awg22 1/0.65 tin coating ju03 85801065gy wire copper awg22 1/0.65 tin coating ju04 85801065gy wire copper awg22 1/0.65 tin coating ju05 85801065gy wire copper awg22 1/0.65 tin coating ju06 85801065gy wire copper awg22 1/0.65 tin coating ju07 85801065gy wire copper awg22 1...

  • Page 40

    R609 rd-az103j- r carbon film 1/6 10k ohm j r610 rd-az152j- r carbon film 1/6 1.5k ohm j r611 rd-az103j- r carbon film 1/6 10k ohm j r612 rd-4z229j- r carbon film 1/4 2.2 ohm j r613 rd-az511j- r carbon film 1/6 510 ohm j r614 rd-az152j- r carbon film 1/6 1.5k ohm j r615 rd-az104j- r carbon film 1/6 ...

  • Page 41

    Cc408 hcbk682kba c chip cera 50v x7r 6800pf k 1608 cc409 hcqk391jba c chip cera 50v ch 390pf j 1608 cc410 hcqk390jba c chip cera 50v ch 39pf j 1608 cc411 hcqk221jba c chip cera 50v ch 220pf j 1608 cc412 hcqk681jba c chip cera 50v ch 680pf j 1608 cc413 hcbh104kba c chip cera 25v x7r 0.1mf k 1608 cc41...

  • Page 42

    Rc708 hrft203jba r chip 1/10 20k ohm j 1608 rc709 hrft472jba r chip 1/10 4.7k ohm j 1608 rc710 hrft103jba r chip 1/10 10k ohm j 1608 rc711 hrft103jba r chip 1/10 10k ohm j 1608 rc712 hrft103jba r chip 1/10 10k ohm j 1608 rc713 hrft105jba r chip 1/10 1m ohm j 1608 rc714 hrft103jba r chip 1/10 10k ohm...

  • Page 43

    R437 rs02z129j- r m-oxide film 2w 1.2 ohm j (tapping) r442 rs02z301j- r m-oxide film 2w 300 ohm j (tapping) r455 rs02z121j- r m-oxide film 2w 120 ohm j (tapping) r464 rs02z104j- r m-oxide film 2w 100k ohm j tapping r465 rs02z301j- r m-oxide film 2w 300 ohm j (tapping) r474 rs01z471j- r m-oxide film ...

  • Page 44

    Q422 tkta1270y- tr kta1270y (tp) q424 tktc3198y- tr ktc3198y q426 tktc3198y- tr ktc3198y q429 tktc3198y- tr ktc3198y q701 tktc3198y- tr ktc3198y q702 tktc3198y- tr ktc3198y q703 tktc3198y- tr ktc3198y q704 tktc3198y- tr ktc3198y q705 tktc3198y- tr ktc3198y q706 tkta1266y- tr kta1266y (tp) q707 tktc3...

  • Page 45

    J034 85801065gy wire copper awg22 1/0.65 tin coating j035 85801065gy wire copper awg22 1/0.65 tin coating j036 85801065gy wire copper awg22 1/0.65 tin coating j037 85801065gy wire copper awg22 1/0.65 tin coating j038 85801065gy wire copper awg22 1/0.65 tin coating j039 85801065gy wire copper awg22 1...

  • Page 46

    J140 85801065gy wire copper awg22 1/0.65 tin coating j141 85801065gy wire copper awg22 1/0.65 tin coating j142 85801065gy wire copper awg22 1/0.65 tin coating j143 85801065gy wire copper awg22 1/0.65 tin coating j144 85801065gy wire copper awg22 1/0.65 tin coating j145 85801065gy wire copper awg22 1...

  • Page 47

    R441 rd-az102j- r carbon film 1/6 1k ohm j r443 rd-az153j- r carbon film 1/6 15k ohm j r445 rd-az473j- r carbon film 1/6 47k ohm j r446 rd-az272j- r carbon film 1/6 2.7k ohm j r447 rd-az273j- r carbon film 1/6 27k ohm j r448 rd-az102j- r carbon film 1/6 1k ohm j r449 rd-az103j- r carbon film 1/6 10k...

  • Page 48

    10. Circuit diagram - 47 - 10-1. Power circuit.

  • Page 49

    - 48 - circuit diagram 10-2. Main circuit.

  • Page 50

    Circuit diagram - 49 - 10-3. Audio circuit.

  • Page 51

    Circuit diagram - 50 - 10-4. 3d comb filter circuit.

  • Page 52

    Circuit diagram - 51 - 10-5. Main video circuit.

  • Page 53

    Circuit diagram - 52 - 10-6. Sub video circuit.

  • Page 54

    Circuit diagram - 53 - 10-7. Scan rate converter.

  • Page 55

    Circuit diagram - 54 - 10-8. Rgb processor.

  • Page 56

    Circuit diagram - 55 - 10-9. Av circuit.

  • Page 57

    Circuit diagram - 56 - 10-10. Union circuit.

  • Page 58

    Circuit diagram - 57 - 10-11. Signal flow diagram ia 01 cxa1855 video switch r3 y3 v1 ia02 mm1232 video switch uc100 upd64082 3d comb-filter y/c sep. Uc101 4m bit dram y main cvbs c main y main c main uc105 vpc3230 sub video processor uc104 vpc3230 main video processor y main c main y ic02, iu02 z90...

  • Page 59

    11. Exploded view - 58 -.