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Daewoo DTQ 27U4SC Service Manual

Other manuals for DTQ 27U4SC: Instruction Manual, Instruction Manual
Manual is about: COLOR TELEVISION

Summary of DTQ 27U4SC

  • Page 1

    Service manual http : //svc.Dwe.Co.Kr s/m no : tcn230fef0 color television chassis : cn-230f model : dtq-20u4sc dtq-2033sc dtq-27u4sc mar. 2003 ✔ caution : in this manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts in...

  • Page 2

    -1- safety precautions 2 specifications 5 circuit block diagram 6 alignment instructions 7 your remote control 7 service mode adjustment 8 assembly adjustment 10 schematic diagram 13 electrical parts list 17 different parts list 37 explode view 42 printed circuit board 45 ic description 48 waveforms...

  • Page 3

    -2- safety precautions caution : do not attempt to modify this product in any way. Never perform customized installations without manufac- turer's approval. Unauthorized modifications will not only void the warranty, but may lead to your being liable for ant result- ing property damage or user injur...

  • Page 4

    -3- safety precautions 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 be performed only after you are thoroughly familiar...

  • Page 5

    -4- safety precautions subject : implosion 1. All direct viewed picture tubes are equipped with an integral implo- sion 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 tu...

  • Page 6

    -5- specifiction model dtq-20u4sc dtq-2033sc dtq-27u4sc item chassis cn-230f tv standard ntsc-m power input ac 120v, 60hz power consumption 90w 120w tuning system frequency synthesizer(fs) tuning system tuning ranges tv vhf(l) : ch2 - ch6 uhf(h) : ch7 - ch13 uhf : ch14 - ch69 catv vhf(l) : 5a, a,b,a...

  • Page 7

    -6- circuit block diagram.

  • Page 8

    -7- alignment instruction 1. Power use this button to turn your tv on or off. 2. Mute use to turn the tv's sound on and off. 3. Ch use these buttons to change your tv's volume, to activate selections in the menu system. 4. Vol use thesebuttons to change your tv's volume, to activate selections in th...

  • Page 9

    -8- alignment instruction 1. Service mode adjustments follow the steps below whenever service adjustment is required. See table- a and table- b to determine if service adjustments are required. 1) how to enter the service mode using the user remote control. • turn the set on. • direct the remote con...

  • Page 10

    -9- alignment instruction mode adjustment data remarks initial20” initial 27” range s2 screen adjustment s5 sound control fm/am pre 55 55 0~127 scart pre 49 51 0~127 moni vol 38 45 0~127 quasi check no no yes/no no sd no power no no yes/no s6 v-size 387 416 0~510 * v-posi 1312 1280 240~1712 * h-phas...

  • Page 11

    -10- alignment instruction 2) focus adjustment • turn in a local station and adjust the focus control knob (located on fbt) for best picture details at high light condition. 3) geometric adjustments (s6) • select service adjustment s6 • you can see the osd as shown in below. 3-1. Horizontal position...

  • Page 12

    -11- alignment instruction 3-3. Vertical size adjustment • select “v.Size” item, adjust “v.Size” data value to proper vertical size as follows. 4) white balance adjustment(s8) • receive a good local channel. • enter the service mode and select service adjustment s8. • you can see the osd as shown in...

  • Page 13

    -12- alignment instruction • select subbrightness item, adjust subbrightness data value to obtain normal brightness level. • press the display button to memorize the data. Contrast • fixed value = 13 tint • fixed value = 200 color • fixed value = 100 6) factory outgoing mode (s12 : fact) • if you se...

  • Page 14

    -13- schematic diagram 20u4(sheet-1).

  • Page 15

    -14- schematic diagram 20u4 (sheet-2).

  • Page 16

    -15- schematic diagram 27u4(sheet-1).

  • Page 17

    -16- schematic diagram 27u4(sheet-2).

  • Page 18

    -17- electrical parts list 1 zz100 48b4343a07 transmitter remocon r-43a07 (aa) 2 zz110 ptacpwj954 accessory as dtq-21u4sc 3 m821 4858213801 bag instruction l.D.P.E t0.05x250x400 4 zz120 ptbcshj954 cover back as dtq-21u4sc 5 m211 4852161700 cover back fr hips gy 21u4 6 m781 4857817630 cloth black fel...

  • Page 19

    -18- electrical parts list 41 c331 ceyd1h689w c electro 50v rhd 6.8mf (16x35.5) 42 c404 cmyh3c912j c mylar 1.6kv bup 9100pf j 43 c406 cmye2g364j c mylar 400v pu 0.36mf j 44 c801 cl1uc3104m c line across world ac250v 0.1uf m r.47 45 c804 ceyn2d331p c electro 200v lhs 330mf 46 c812 ceyf1e332v c electr...

  • Page 20

    -19- electrical parts list 86 jp05 4859102130 jack earphone ysc-1537 87 l301 58c7070085 coil choke tln-3062a 88 l401 58h0000020 coil h-linearity l-76(76.5uh) 89 l801 5plf24a3— filter line lf-24a3 90 p502 4859235320 conn wafer yw025-10 91 pwc1 4859907810 cord power as me301p+ter=2100 92 q402 pte2sw76...

  • Page 21

    -20- electrical parts list 131 e004 4856310600 eye let bsr t0.2 (r2.3) 132 e005 4856310600 eye let bsr t0.2 (r2.3) 133 e006 4856310600 eye let bsr t0.2 (r2.3) 134 e007 4856310600 eye let bsr t0.2 (r2.3) 135 e008 4856310600 eye let bsr t0.2 (r2.3) 136 e009 4856310600 eye let bsr t0.2 (r2.3) 137 e010 ...

  • Page 22

    -21- electrical parts list 176 e053 4856310300 eye let bsr t0.2 (r1.6) 177 e056 4856310300 eye let bsr t0.2 (r1.6) 178 e057 4856310300 eye let bsr t0.2 (r1.6) 179 e058 4856310300 eye let bsr t0.2 (r1.6) 180 e059 4856310300 eye let bsr t0.2 (r1.6) 181 e060 4856310300 eye let bsr t0.2 (r1.6) 182 e061 ...

  • Page 23

    -22- electrical parts list 221 c204 cexf1h100v c electro 50v rss 10mf (5x11) tp 222 c210 cexf1h470v c electro 50v rss 47mf (6.3x11) tp 223 c301 cmxm2a103j c mylar 100v 0.01mf j (tp) 224 c302 cexf1h479v c electro 50v rss 4.7mf (5x11) tp 225 c303 cexf1h100v c electro 50v rss 10mf (5x11) tp 226 c305 ce...

  • Page 24

    -23- electrical parts list 266 c615 cexf1h338v c electro 50v rss 0.33mf (5x11) tp 267 c616 cexf1h338v c electro 50v rss 0.33mf (5x11) tp 268 c617 cexf1h338v c electro 50v rss 0.33mf (5x11) tp 269 c618 cexf1h100v c electro 50v rss 10mf (5x11) tp 270 c620 cexf1h100v c electro 50v rss 10mf (5x11) tp 27...

  • Page 25

    -24- electrical parts list 311 q601 tktc3198y- tr ktc3198y 312 q602 tktc3198y- tr ktc3198y 313 q603 tkta1266y- tr kta1266y (tp) 314 q701 tktc3198y- tr ktc3198y 315 q702 tktc3198y- tr ktc3198y 316 q704 tkta1266y- tr kta1266y (tp) 317 q706 tktc3198y- tr ktc3198y 318 q708 tktc3198y- tr ktc3198y 319 q80...

  • Page 26

    -25- electrical parts list 356 c510 cczb1h221k c cera 50v b 220pf k (axial) 357 c511 cczb1h221k c cera 50v b 220pf k (axial) 358 c514 cczf1h103z c cera 50v f 0.01mf z 359 c515 cczf1h103z c cera 50v f 0.01mf z 360 c516 cczf1h103z c cera 50v f 0.01mf z 361 c517 czch1h309c c cera 50v ch 3pf c (axial) 3...

  • Page 27

    -26- electrical parts list 401 d304 d1n4148—- diode 1n4148 (tapping) 402 d401 d1n4937g— diode 1n4937g (tapping) 403 d402 duz9r1bm— diode zener uz-9.1bm 404 d405 d1n4937g— diode 1n4937g (tapping) 405 d406 d1n4937g— diode 1n4937g (tapping) 406 d407 d1n4937g— diode 1n4937g (tapping) 407 d408 d1n4937g— ...

  • Page 28

    -27- electrical parts list 446 j125 85801065gy wire copper awg22 1/0.65 tin coating 447 j126 85801065gy wire copper awg22 1/0.65 tin coating 448 j127 85801065gy wire copper awg22 1/0.65 tin coating 449 j128 85801065gy wire copper awg22 1/0.65 tin coating 450 j129 85801065gy wire copper awg22 1/0.65 ...

  • Page 29

    -28- electrical parts list 491 j182 85801065gy wire copper awg22 1/0.65 tin coating 492 j183 85801065gy wire copper awg22 1/0.65 tin coating 493 j186 85801065gy wire copper awg22 1/0.65 tin coating 494 j187 85801065gy wire copper awg22 1/0.65 tin coating 495 j188 85801065gy wire copper awg22 1/0.65 ...

  • Page 30

    -29- electrical parts list 536 j256 85801065gy wire copper awg22 1/0.65 tin coating 537 j257 85801065gy wire copper awg22 1/0.65 tin coating 538 j258 85801065gy wire copper awg22 1/0.65 tin coating 539 j267 85801065gy wire copper awg22 1/0.65 tin coating 540 j268 85801065gy wire copper awg22 1/0.65 ...

  • Page 31

    -30- electrical parts list 581 j512 85801065gy wire copper awg22 1/0.65 tin coating 582 j556 85801065gy wire copper awg22 1/0.65 tin coating 583 j611 85801065gy wire copper awg22 1/0.65 tin coating 584 j705 85801065gy wire copper awg22 1/0.65 tin coating 585 j713 85801065gy wire copper awg22 1/0.65 ...

  • Page 32

    -31- electrical parts list 626 r103 rd-az102j- r carbon film 1/6 1k ohm j 627 r104 rd-az102j- r carbon film 1/6 1k ohm j 628 r105 rd-2z392j- r carbon film 1/2 3.9k ohm j 629 r201 rd-4z241j- r carbon film 1/4 240 ohm j 630 r202 rd-az750j- r carbon film 1/6 75 ohm j 631 r203 rd-az750j- r carbon film 1...

  • Page 33

    -32- electrical parts list 671 r509 rd-az303j- r carbon film 1/6 30k ohm j 672 r518 rd-az682j- r carbon film 1/6 6.8k ohm j 673 r519 rd-az682j- r carbon film 1/6 6.8k ohm j 674 r520 rd-az472j- r carbon film 1/6 4.7k ohm j 675 r523 rd-az472j- r carbon film 1/6 4.7k ohm j 676 r524 rd-az222j- r carbon ...

  • Page 34

    -33- electrical parts list 716 r612 rd-az101j- r carbon film 1/6 100 ohm j 717 r613 rd-az101j- r carbon film 1/6 100 ohm j 718 r614 rd-az101j- r carbon film 1/6 100 ohm j 719 r615 rd-az101j- r carbon film 1/6 100 ohm j 720 r616 rd-az101j- r carbon film 1/6 100 ohm j 721 r618 rd-az103j- r carbon film...

  • Page 35

    -34- electrical parts list 761 r746 rd-az222j- r carbon film 1/6 2.2k ohm j 762 r747 rd-az392j- r carbon film 1/6 3.9k ohm j 763 r748 rd-az472j- r carbon film 1/6 4.7k ohm j 764 r750 rd-az472j- r carbon film 1/6 4.7k ohm j 765 r751 rd-az471j- r carbon film 1/6 470 ohm j 766 r752 rd-az471j- r carbon ...

  • Page 36

    -35- electrical parts list 806 r881 rc-2z565kp r carbon comp 1/2 5.6m ohm k 807 r884 rc-2z225kp r carbon comp 1/2 2.2m ohm k 808 r892 rd-az203j- r carbon film 1/6 20k ohm j 809 r893 rn-az2002f r metal film 1/6 20.0k ohm f 810 r980 rd-4z684j- r carbon film 1/4 680k ohm j 811 zz300 ptcpmsj954 pcb crt ...

  • Page 37

    -36- electrical parts list 851 r909 rd-az432j- r carbon film 1/6 4.3k ohm j 852 r910 rd-2z683j- r carbon film 1/2 68k ohm j 853 r911 rd-az751j- r carbon film 1/6 750 ohm j 854 r912 rc-2z102k- r carbon comp 1/2 1k ohm k 855 r913 rd-az331j- r carbon film 1/6 330 ohm j 856 r914 rd-az432j- r carbon film...

  • Page 38

    -37- different parts list 1 i801 ptc2sw7720 heat sink ass`y 1mr2540—- + 7174300811 2 00001 1mr2540—- ic power mr2540 3 0000a 4857027720 heat sink al ex 4 0000b 7174300811 screw tapptite tt2 rnd 3x8 mfzn 5 q402 ptf2sw7607 heat sink ass`y t2sd2578— + 7174301011 6 00001 t2sd2578— tr hori 2sd2578 7 0000...

  • Page 39

    -38- -38- different parts list 55 r302 rn02b620js r metal film 2w 62 ohm j small 56 r305 rn02b910js r metal film 2w 91 ohm j small 57 r351 rd-4z362j- r carbon film 1/4 3.6k ohm j 58 r353 rn-az1302f r metal film 1/6 13k ohm f 59 r359 rd-4z623j- r carbon film 1/4 62k ohm j 60 r360 rd-4z562j- r carbon ...

  • Page 40

    -39- -39- different parts list 110 v901 4859635262 crt a68qdl280x011(b) p38 111 zz120 ptbcshk009 cover back as dtq-29u4sc 112 zz130 ptpkcpk009 packing as dtq-29u4sc 113 zz131 48519a4210 crt ground net 2901h-1015-2p 114 zz132 58g0000143 coil degaussing dc-29s1 115 zz140 ptcacak009 cabinet as dtq-29u4...

  • Page 41

    -40- different parts list 166 c945 cexf2c100v c electro 160v rss 10mf (10x16) tp 167 c946 cexf1c331v c electro 16v rss 330mf (8x11.5) tp 168 c947 cmxl2e104k c mylar 250v meu 0.1mf k 169 d905 duz12bm—- diode zener uz-12bm (unizon) 170 d906 d1n4148—- diode 1n4148 (tapping) 171 d907 d1n4148—- diode 1n4...

  • Page 42

    -41- different parts list 222 r557 rd-az223j- r carbon film 1/6 22k ohm j 223 r558 rd-az101j- r carbon film 1/6 100 ohm j 224 r559 rd-az221j- r carbon film 1/6 220 ohm j 225 r921 rc-2z102k- r carbon comp 1/2 1k ohm k 226 r922 rd-2z100j- r carbon film 1/2 10 ohm j 227 r924 rd-az102j- r carbon film 1/...

  • Page 43

    -42- explode view 3 2 4 7 6 5 8 9 11 12 13 14 15 16 17 19 10 18 model reference scale units mm d n daewoo electronics corp. Mechanical design team, tv research center ( 1 / 1 ) 0.250 no part code part name qty material remarks 1 main pcb 1 2 4852081000 front mask 1 fr hips gy 3 4854862100 button pow...

  • Page 44

    -43- explode view 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 18 19 20 12 button power spring mark brand mask front button ctrl as tapping screw speaker tapping screw cn_230f chassis crt fix screw crt fix screw crt cover back tapping screw tapping screw tapp...

  • Page 45

    -44- explode view 2 3 4 5 6 7 8 9 10 11 12 15 13 14 16 17 18 model reference scale units mm d n daewoo electronics corp. Mechanical design team, tv research center ( 1 / 1 ) 0.200 no part code part name qty material remarks 1 4852083400 mask front 1 fr hips gy designed by checked by inspected by app...

  • Page 46

    -45- printed circuit board (cn-230f/main).

  • Page 47

    -46- printed circuit board(cn-230f/20u4 crt).

  • Page 48

    -47- printed circuit board(cn-230f/27u4 crt).

  • Page 49

    -48- ic description 1. Pin congiguration nc nc nc nc av op inch op nc spare vss xt1 xt2 vdd key in aft in nc a/d reset filter cvbs in vs(inv) hs(inv) power d/g sw a mute v sw mspres nc vdpres st led rc in i/o i/p i/o s-vhs scl1 sda1 scl2 sda2 osd i osdblk osd b osd g osd r i701 dw8638ta1 *scl1/sda1 ...

  • Page 50

    -49- ic description appendix pin pin name description def act i/o pud stb 1 p10 nc d 2 p11 nc - d 3 p12 nc - d 4 p13 nc - d - 5 p14 av(cvbs in) option h : av1~av2, cvi ; l : av1~av3, cvi - h i u - 6 p15 inch option d 7 p16 nc d 8 p17 nc(spare) 9 vss gnd 10 xt1 crystal input i 11 xt2 crystal output o...

  • Page 51

    -50- ic description 3. Pin congration test resq scl sda gndd hcs fsy csu vs intlc vprot safetu hflb gndd vsupd gndd vsupd p0 p1 p2 p3 p4 p5 p6 gndd rsw2 rsw1 sense gndm vertq vert e/w vin4 vin3 vin2 vin1 cin1 vout vsupaf vrt sgnd gndaf cbin cin2/crin xtal2 xtal1 hout clk20 fblin2 bin2 gin2 rin2 fbli...

  • Page 52

    -51- ic description appendix 4. Pin description pin no. Pin name type short description 1 test in test input 2 resq in reset input 3 scl in/out i2c bus clock 4 sda in/out i2c bus data 5 gndd supply digital ground 6 hcs in half contrast switch input 7 fsy out front sync out 8 csy out composite sync o...

  • Page 53

    -52- ic description appendix pin no. Pin name type short description 45 rin2 in analog red input2 46 gin2 in analog green input2 47 bin2 in analog blue input2 48 fblin2 in fast blank input 49 clk20 out 20.25mhz system clock output 50 hout out horizontal drive output 51 xtal1 in analog crystal input ...

  • Page 54

    -53- waveforms (2) t801 pin17 power on (2) t801 pin17 stand-by 0 (1) i801 pin7 power on (1) i801 pin7 stand-by (4)t402 pin1 hor.Out (3) i501 pin50 hout appendix.

  • Page 55

    -54- waveforms appendix (5) t402 pin3 200v line (6) t402 pin9 heater line (7) t402 pin4 12v line (8) t402 pin6 27v line (9) i501 pin31 vertical ramp (10) i501 pin32 e/w.

  • Page 56

    -55- waveforms appendix (11) cvbs (composite video) (12) i501 pin52 vdp x-tal (13) i501 pin11 vsync (14) svm q902 base (15) svm q906 base (16) svm q907 base.

  • Page 57

    -56- waveforms appendix (17) svm q909 base (18) i901 pin7 rout.

  • Page 58

    -57- troubleshooting guide appendix drain 7 6 i801 mr2520 5 4 3 2 1 vin vcc gnd f / b z / c source /ocl fb01 l801 r801 c803 c802 d801 125v 5a + + + + l805 c820 c814 r814 r813 r822 c818 d804 r862 c819 ocp +133v +45v +12v (sound) +5v (st-by) q871 r827 q873 r877 (micom power on/off) pwr on : h pwr off ...

  • Page 59

    -58- troubleshooting guide appendix 2.No picture 33v 5v composite video check clock/data signal #61 #27 #28 #29 sda #4 #30 scl #3 #10 #11 #12 x701 32.768khz st-by 5v check the crystal (d) check composite video #61 check vsup(+5v) #58 #17 check vsup(+3.3v) check hout #50 #15 #39 i501 check rgb signal...

  • Page 60

    -59- troubleshooting guide appendix 3. No sound (e) 33v 5v sif out check x601 the crystal 18.432mhz #58 #63 #62 #27 #28 #57 check vsup +5v #29 #10 #39 check vsup +8v #30 sda #9 #18 check vsup +5v #10 #11 #12 scl x701 32.768khz st-by 5v check clock/data signal check the crystal (f) check vcc of sound...

  • Page 61

    -60- troubleshooting guide appendix 4. Ch don’t memory or skip (g) 33v 5v check 5v/33v line u101 check composite video signal tuner cvbs t-data t-clock check t-sda/scl #27 #28 #61 #29 sda #4 #30 scl #3 #10 #11 #12 sda x701 32.768khz st-by 5v scl check the crystal #5 #6 check sda/scl #8 st-by 5v chec...

  • Page 62

    -61- troubleshooting guide appendix 5. No color 6. No vertical deflection check cvbs waveform r out #37 #36 #58 #51 check the crystal check the voltage check vout signal check vertical signal vertical d.Y check the voltage(27v) i301 vcc 27v check r/g/b signal x501 x501 vsup 5v vsup 5v vsup 3.3v #61 ...

  • Page 63

    -62- troubleshooting guide appendix 7. No on-screen display 8. Remote control does not operate v. Sync check the signal(60hz) check data/clock signal i501 vdp3130y il701 remocon preamp i701 micom i701 micom h. Sync st-by 5v st-by 5v st-by 5v #20 #22 #23 #24 #25 #41 #42 #43 #44 #12 #11 #10 #12 #34 #1...

  • Page 64

    Printed date : mar. 2003.