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Daewoo DC-B83D1D Service Manual - Troubleshooting

Summary of DC-B83D1D

  • Page 1

    S/m no. : vdcb83pet service manual model: dc-g84d1d dc-g8gd1s dc-g8gd1d dc-g8hd1p dc-g8gd1p dc-g8gd1d dc-b84d1p sg-7200 sg-7500 sg-9500p sg-9200p sg-9300 sg-9200s sg-9300p sg-9500s may. 2006.

  • Page 2: Contents

    1 specifications ...............................................................................................................2 advantages of this product....................................................................................3 trouble shooting.............................................

  • Page 3: Specifications

    2 specifications disc type dvd video-cd cd analogue audio output 48/96khz sampling 44.1khz sampling 44.1khz sampling digital audio output 48khz sampling 44.1khz sampling 44.1khz sampling output power 200-240v~, 50/60hz consumed electricity 20w weight 4.6kg dimension (w x h x d) 435mmx93mmx255mm oper...

  • Page 4: Advantages of This Product

    Advantages of this product 3 • dvd, vcd, cd, cd-r(mp3), cd-rw, vhs • watching dvd for recording broadcast • integrated remote control (vcr, dvd) • viss function • multiplex sound playback/record • high sound quality of 6 head hi-fi • simple record function • mp3 file playback function (cd-r disc hav...

  • Page 5

    4 advantages of this product • multi subtitle function (dvd) the subtitle can be seem in up to 32 languages. In the case of svcd or vcd, it depends on the disc. (the number of subtitle languages depends on the software.) • multi angle function (dvd) this function allows you to choose the viewing ang...

  • Page 6: Troubleshooting

    5 troubleshooting 1. Power circuit ✓ caution you must use insulated transformer during the first part test of power circuit. Check ic501, ic701 no power power cord is ok? Is 400v~200v voltage obtained at c804 +? Output voltage of 2 nd parts is normal? Check rectifier diode of 2 nd parts ; d821, d822...

  • Page 7

    2. System circuit 6 troubleshooting no led display. Is 5v obtained at ic701 pin #9, 25? Oscillation at ic701pin #1? Specific grid/seg doesn t function. Check r588, d857, l503, l860 exchange ic701. Check ic 701 pin #22~24, 27, 28, 30, 31. Check ic 701 pin #10~12, 14~21. No yes yes no no grid output a...

  • Page 8

    7 troubleshooting noise appears on the playback screen. Is noise diminished by tracking adjustment. Noise band is trembled up and down? Re-adjust path. Is the height of ctl head normal? No dust? Is there problem in ctl input circuit and amplifier. Yes no no no is there ctl pulse at ic501 pin#97? Che...

  • Page 9

    8 troubleshooting no broadcasting signal received is the output at ic501 pin# 61(clk), 60 (data) normal? Is sif,video output at tmi(rf101) pin#16,19 normal? Check ic 501. Check ic301. Check ic501. Yes yes no no no is video signal input at ic501 pin#50? Is there video output at ic501 pin#52? Check tm...

  • Page 10

    9 troubleshooting cassette tape isn’t inserted. Is 5v voltage obtained at loading parts ic501 pin#2? Is 14v voltage obtained at capstan motor p501 pin#2? Check at ever 14v check q850. Connect capstan and loading motor. Check connector and capstan motor. Yes no no no is 13v voltage obtained at each p...

  • Page 11

    10 troubleshooting f. Drum motor stops g. Capstan doesn’t rotate capstan doesn’t rotate. Is ever 14v voltage obtained at p501 pin#2? Yes no no no yes yes is capstan pwm fit to ic501 pin#77? Is 3.2v voltage obtained at p501 pin#5? Is 2.7v voltage obtained at p501 pin#9? Check p501 connector and capst...

  • Page 12

    11 troubleshooting 3. Video circuit a. Ee screen doesn’t appear ee mode picture ng is video signal input at ic301 pin#48,50,52,54? Is 5v supplied at pin#42,55,72,91of ic301? Is c.S, data, clock signal input pin#67,68,69 of ic301? Check if and line in jack. Check power circuit. Check ic501 pin #58,71...

  • Page 13

    12 troubleshooting b. Playback picture doesn’t appear yes yes is y signal output at ic301 pin#46? Is video signal output at ic301 pin#65? Check and replace ic301. Pb video signal missing. Is envelope output from ic301 pin#79? No no same as ee mode check. Is 5v supplied at ic301 pin#91? Is sw pulse i...

  • Page 14

    13 troubleshooting is +5v supplied at ic301 pin#91? No no yes yes is video sw pulse input at ic301 pin#70? Is rec signal output from ic301 pin#94,95,89,90? Lp mode: 89,90 pin sp mode: 94,95pin check video head and connector. Is signal input into ic301 pin# 48,50,52,54,56? Check power circuit. Check ...

  • Page 15

    14 troubleshooting no is video signal input at ic501 pin#50? Check power circuit. No osd appears. Is 5v obtained at ic501 pin# 53, 98, 99? Is video signal output at ic501 pin#52? No replace ic501. D. No osd(on screen display) appears yes yes no check ic 501. Check ic 501. No check pcb pattern check ...

  • Page 16

    15 troubleshooting 4. Audio (hi-fi model) no sound in rf e-e mode is audio signal output at ic601 pin #3, 13? A. No sound in e-e mode a. Rf e-e check ic501. Is audio signal output at ic251 pin#16,17? Are clk and data obtained at ic251 pin#42,43? No is 5v obtained at ic251 pin#40? Replace ic251. Yes ...

  • Page 17

    16 troubleshooting b. Av1 e-e no sound in av1 e-e mode. No check input av1 jack is audio signal at ic251 pin#6, 7? Is audio signal output at ic601 pin #3, 13? Check ic501. Is audio signal output at ic251 pin#16,17? Are clk and data obtained at ic251 pin#42,43? No is 5v obtained at ic251 pin#40? Repl...

  • Page 18

    17 troubleshooting c. Av2 e-e no sound in av2 e-e mode. No check input av2 jack is audio signal at ic251 pin#8, 9? Is audio signal output at ic601 pin #3, 13? Check ic501. Is audio signal output at ic251 pin#19, 20? Are clk and data obtained at ic251 pin#42,43? No is 5v obtained at ic251 pin#40? Rep...

  • Page 19

    18 troubleshooting d. Dvd e-e no sound in dvd e-e mode. Check ffc(19p or 11p) fix the ffc(19p or 11p) no is audio signal output at ic601 pin #3, 13? Check ic501. Yes replace ic601. Comparing with switching table, are swa, b ctl signal right at ic601 pin #9,10? No check output jack. Yes yes no.

  • Page 20

    19 troubleshooting is audio signal at ic601 pin#1, 12? Check input front jack. No is audio signal output at ic601 pin #3, 13? Check ic501. Yes replace ic601. Comparing with switching table, are swa, b ctl signal right at ic601 pin #9,10? No check output jack. Yes yes no e. Front e-e no sound in fron...

  • Page 21

    20 b. No hi-fi playback audio(play mode) no check a.Sw at ic501 pin#19. Is audio signal at ic251 pin#41? Is audio signal output at ic601 pin #3, 13? Check ic501. Is audio signal output at ic251 pin#16,17? Are clk and data obtained at ic251 pin#42,43? No is 5v obtained at ic251 pin#40? Replace ic251....

  • Page 22

    21 c. No hi-fi playback in record/playback mode (rec mode) are there audio signal at ic251 pin#4~9? Is fm osc signal at ic251 pin#36? Check input line1 jack. Check input line2 jack. Check icd03(dvd). Replace drum. Yes no no no is fm osc signal at p401 pin#2? Replace ic251 yes head cleaning. Yes d. N...

  • Page 23

    22 troubleshooting e. No normal audio playback in record/playback mode(check in rec mode) no normal audio playback in record/playback mode are there audio signal at ic251 pin#4~9? Is there recording signal at ic251 pin#21? Check input line1 jack. Check input line2 jack. Check icd03(dvd). Check signa...

  • Page 24: Waveforms

    23 waveforms 1. Video ! (ic301-70) 5vp-p 1v/2msec/cm rec ! (ic301-70)5vp-p 1v/2msec/cm play @ (ic301-46) 520mvp-p 200mv/5usec/cm rec @ (ic301-46) 520mvp-p 200mv/5usec/cm play # (ic301-43) 520mvp-p 100mv/5usec rec # (ic301-43) 520mvp-p 100mv/5usec play $ (ic301-21) 600mvp-p 200mv/2msec/cm play(sp) vi...

  • Page 25

    24 waveforms 2. Audio 2-1 audio(normal) 2-2 audio(hi-fi) * (ic301-15) 100mvp-p 20mv/0.5msec/cm rec ( (ic301-11) 1.5vp-p 0.5v/0.5msec/cm rec ) (ic301-100) 2.3vp-p 0.5v/0.5msec/cm rec 1 (ic301-8) 120mvp-p 50mv/0.5msec/cm play 2 (p202-2) 75vp-p 10v/20 µ sec/cm rec 3 (ic251-2) 80mvp-p 20mv/0.5msec ee/re...

  • Page 26

    25 waveforms 3. Servo/syscon 8 (ic501-18) 5vp-p 2v/5msec/cm rec/play 9 (ic501-77) 5vp-p 2v/5 µ sec/cm rec/play 0 (ic501-76) 5vp-p 2v/5 µ sec/cm rec/play “ (ic501-94) 3vp-p 1v/5msec/cm rec ‘ (ic501-97) 4.4vp-p 1v/5msec/cm play + (ic501-90)25vp-p&5vp-p 1v/5msec/cm rec/play = (ic501-87) 2.5vp-p 1v/0.2m...

  • Page 27

    26 circuit diagram 1. Power supply circuit diagram.

  • Page 28

    27 circuit diagram 2. Servo & syscon circuit diagram.

  • Page 29

    28 circuit diagram 3. A/v circuit diagram.

  • Page 30

    29 4. Hifi & sw & input circuit diagram circuit diagram.

  • Page 31

    30 circuit diagram 5. Hi-fi & pif & inout circuit diagram.

  • Page 32

    31 circuit diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a video interface memory iic audio interface interface i/o flash v1.7 rs-232 reset & power pins for 64mbit sdram & pull-down resistor for address ma11 external video level control r urst# v18 dv33 pllvdd3 sda cs# dq[0..15] ir ar cs scl pwr# prd# m...

  • Page 33

    32 circuit diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a video interface memory iic audio interface interface i/o flash v1.7 rs-232 reset & power pins for 64mbit sdram & pull-down resistor for address ma11 external video level control r urst# v18 dv33 pllvdd3 sda cs# dq[0..15] ir ar cs scl pwr# prd# m...

  • Page 34

    33 5 5 4 4 3 3 2 2 1 1 d d c c b b a a power 3 s 2 c g e 2n7002mtf d 1 2 b 1 3 ktc3875s p/up connection p/up mpeg a b c d d a b c 1 3 2 e b c kta1271 top (pnp,dip) 1 b c c 2 3 e 2sb1132 avcc1 mo_vcc dv33 ldo_av33 avcc opo sp+ sp- spp- vip4 sl- sl+ v1p4 sl- f+ mpd v20 dvd-ld cd-vr tr- dvd-vr sw rf c ...

  • Page 35

    34 circuit diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 8mbit flash tsop 48 pin flash sdram iic power tsop(ii) 50 pin 16mbit sdram ad2 a18 a1 ad7 ad6 ad4 a5 a6 a8 a17 a0 a16 ad0 ad5 ad3 a7 a15 a4 a2 ad1 a12 a14 a11 pce# prd# a3 a10 a13 a9 sd33 v33 pce# sda sda scl prd# pwr# scl a[0..19] pwr# flash_vc...

  • Page 36

    35 circuit diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a video output vcr interface power part audio interface vsda vstb vsck ir cs y[3..6] y6 y3 pr pb s_y y y5 y4 s_c cvbs gnd opref al fl fr opref ar +12v gnd gnd vstb tclk mute_dac gnd css vsck sin sout cs gnd frr fll ar mute_dac pv33 v60 aspdif +p12...

  • Page 37

    36 pcb circuit board 1-1 . Vcr (main).

  • Page 38

    37 pcb circuit board 1-2. Power.

  • Page 39

    38 pcb circuit board 1-3. Dvd (main).

  • Page 40: Instrument Disassembly

    Instrument disassembly 1. Deck disassembly perform all disassembly procedures in the order presented. When reassembling, use the reverse procedure. Make sure that all leads/ wiring are routed correctly when reassembling. Fig. 1 a. Top cover removal @ remove a screws ! Remove three screws # remove a ...

  • Page 41

    40 b. Panel front disassembly c. Logic pcb disassembly fig.2 fig.3 ! Remove 3 hooks at bottom @ remove 2 hooks at left and right sides, simultaneously, remove panel. Remove 2 screws, then remove logic instrument disassembly.

  • Page 42

    41 instrument disassembly fig. 4 d. Deck and main parts disassembly ! Remove 6 screws, then remove deck @ remove 4 screws, then remove loader # remove 3 screws, then remove power pcb.

  • Page 43

    42 instrument disassembly fig. 5 e. Main pcb disassembly @ remove 2 screws, then remove main pcb ! Remove 2 screws.

  • Page 44

    43 instrument disassembly f. Main chassis disassembly fig. 6 ! Remove 4 screws, then remove main.

  • Page 45

    44 instrument disassembly g. Explode view.

  • Page 46: Electrical Partslist

    45 electrical partslist loc parts_code parts_name parts_descr remark 03 pvmcass202 chassis main as dc-b87d1s-na d100 97p1ra2ba0 remocon handset as vr-fa2ba0 gy3301a(aaa) dp08 97p882tf12 cable scart scart-scart 21p 1.2m secam only m01 97pp340000 panel front as dc-b87d1d-nb m1000 pvdkarsc60 deck vcr a...

  • Page 47

    46 electrical partslist loc parts_code parts_name parts_descr remark c370 hcfh474zba c chip cera 25v y5v 0.47mf z 1608 secam only c371 hcfh474zba c chip cera 25v y5v 0.47mf z 1608 secam only c372 hcbk103kba c chip cera 50v x7r 0.01mf k 1608 secam only c373 hcfh474zba c chip cera 25v y5v 0.47mf z 160...

  • Page 48

    Loc parts_code parts_name parts_descr remark r205 hrfs752jba r chip 1/16 7.5k ohm j 1608 r206 hrfs273jba r chip 1/16 27k ohm j 1608 r208 hrfs512jba r chip 1/16 5.1k ohm j 1608 r209 hrfs123jba r chip 1/16 12k ohm j 1608 r216 hrfs103jba r chip 1/16 10k ohm j 1608 r225 hrfs229jba r chip 1/16 2.2 ohm j ...

  • Page 49

    Loc parts_code parts_name parts_descr remark rd15 hrfs113jba r chip 1/16 11k ohm j 1608 rd16 hrfs561jba r chip 1/16 560 ohm j 1608 rd17 hrfs132jba r chip 1/16 1.3k ohm j 1608 rd18 hrfs223jba r chip 1/16 22k ohm j 1608 rd20 hrfs471jba r chip 1/16 470 ohm j 1608 rd33 hrfs103jba r chip 1/16 10k ohm j 1...

  • Page 50

    Loc parts_code parts_name parts_descr remark c327 cexf1c470a c electro 16v rsm 47mf (5x7) tp c331 cexf1c100a c electro 16v rsm 10mf 5x7 c332 cexf1c100a c electro 16v rsm 10mf 5x7 c334 cexf1c470a c electro 16v rsm 47mf (5x7) tp c336 cexf1c470a c electro 16v rsm 47mf (5x7) tp c338 cexf1h109a c electro...

  • Page 51

    50 electrical partslist loc parts_code parts_name parts_descr remark sw517 5s50101z97 sw tact thvv952gba 9.5m auto sw7b5 5s50101z90 sw tact thvv502gda sw7c1 5s50101z90 sw tact thvv502gda sw7c2 5s50101z90 sw tact thvv502gda sw7c3 5s50101z90 sw tact thvv502gda sw7c4 5s50101z90 sw tact thvv502gda sw7c5...

  • Page 52

    51 electrical partslist loc parts_code parts_name parts_descr remark r269 rd-az272j- r carbon film 1/6 2.7k ohm j r276 rd-az183j- r carbon film 1/6 18k ohm j r277 rd-az511j- r carbon film 1/6 510 ohm j r278 rd-az511j- r carbon film 1/6 510 ohm j r303 rd-az102j- r carbon film 1/6 1k ohm j secam only ...

  • Page 53

    52 loc parts_code parts_name parts_descr remark ca20 hcbf224kba c chip cera 16v x7r 0.22mf k 1608 ca21 hcbk471kba c chip cera 50v x7r 470pf k 1608 ca22 hcbk471kba c chip cera 50v x7r 470pf k 1608 ca23 hcbk391kba c chip cera 50v x7r 390pf k 1608 ca24 hcfh104zba c chip cera 25v y5v 0.1mf z 1608 ca26 h...

  • Page 54

    Loc parts_code parts_name parts_descr remark lp20 hlx1210001 bead chip tb201209z121 qa11 tzhu002n-q fet chip rhu002n06 t106 sot-323 60v 0.2a qa12 t2sb1132-b tr chip 2sb1132 r mtp3 t100 qa13 t2sb1132-b tr chip 2sb1132 r mtp3 t100 ra11 hrfs472jba r chip 1/16 4.7k ohm j 1608 ra12 hrfs472jba r chip 1/16...

  • Page 55

    54 loc parts_code parts_name parts_descr remark ca74 cexf1c101a c electro 16v rsm 100mf (6.3x7) tp cc42 cexf1c100a c electro 16v rsm 10mf 5x7 cc43 cexf1h109a c electro 50v rsm 1mf (4x7) tp cc55 cexe0j221s c electro 6.3v rsa 220mf 6.3x7 cd30 cexf1c101a c electro 16v rsm 100mf (6.3x7) tp cm21 cexf1a10...

  • Page 56

    55 electrical partslist * option table option diode(d50*) : dzn4148 - - -(1n4148 auto 52mm) system d501 d502 d503 pal bg x x x pal bg(australia) x x o pal bg/dk(middle east) x o x pal ii(s.Africa) x o o pal ii o x x secam ll ’ o x o secam ll’(swiss) o o x pal bg/dk o o o hi-fi/mono d504 hi-fi(4h’d) ...

  • Page 57

    Daewoo electronics corp. 686, ahyeon-dong, mapo-gu, seoul, korea. C.P.O. Box 8003 seoul korea printed date: may. 2006.