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Daewoo DC-A23D1D Service Manual

Summary of DC-A23D1D

  • Page 1

    S/m no. : vtba84pet0 service manual model: dc-a84d1d dc-a84d1p dc-a84d1s dc-a83d1d dc-a83d1p dc-a83d1s dc-a24d1d dc-a24d1s dc-a23d1d dc-a23d1s ✔ 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 inf...

  • Page 2: Contents

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

  • Page 3: Specifications

    2 specifications dvd audio output standards 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 optical digital audio output 48khz sampling 44.1khz sampling 44.1khz sampling output p...

  • 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 doesnÕt 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), 62 (data) normal? Is sif,video output at tmi(rf101) pin#22,24 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 isnÕt 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 doesnÕt rotate capstan doesnÕt 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 doesnÕt 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 doesnÕt 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. Is there dvd audio at pd01 pin#1, 3? Is 12v obtained at icd03 pin#8? Is audio(dvd) signal at ic601 pin#2,15? Yes yes check icd03. No check dvd board no check power circuit. No is dvd audio signaloutput at icd03 pin#1,7? Check icd03. No yes is a...

  • 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 (ic601-18) 5vp-p 2v/5msec/cm rec/play 9 (ic601-77) 5vp-p 2v/5 µ sec/cm rec/play 0 (ic601-76) 5vp-p 2v/5 µ sec/cm rec/play “ (ic601-94) 3vp-p 1v/5msec/cm rec ‘ (ic601-97) 4.4vp-p 1v/5msec/cm play + (ic601-90)25vp-p&5vp-p 1v/5msec/cm rec/play = (ic601-87) 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 vcr am rec copy c dts t dvd.

  • Page 29

    28 circuit diagram 3. Video/audio circuit diagram.

  • Page 30

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

  • Page 31

    30 circuit diagram 5. Pif circuit diagram.

  • Page 32

    31 circuit diagram 6. Dvd circuit diagram.

  • Page 33

    32 circuit diagram.

  • Page 34

    33 circuit diagram.

  • Page 35

    34 circuit diagram.

  • Page 36

    35 circuit diagram.

  • 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 two screws ! Remove three screws # remove ...

  • 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 pvmcass179 chassis main as dc-a84d1s-na d100 97p1r2zja6 remocon handset as vr-f2zja6(aa)-gy331a dp08 97p882tf12 cable scart scart-scart 21p 1.2m m01 97pp328100 panel front as hips(hb) m100 97q6010000 dvd mecha ddm-4001(hop1200)+...

  • Page 47

    46 electrical partslist loc parts_code parts_name parts_descr remark c369 hcbk103kba c chip cera 50v x7r 0.01mf k 1608 secam only c370 hcfh474zba c chip cera 25v y5v 0.47mf z 1608 secam only c371 hcbk103kba c chip cera 50v x7r 0.01mf k 1608 secam only c372 hcbk103kba c chip cera 50v x7r 0.01mf k 160...

  • Page 48

    Loc parts_code parts_name parts_descr remark r155 hrfs272jba r chip 1/16 2.7k ohm j 1608 r201 hrfs273jba r chip 1/16 27k ohm j 1608 r202 hrfs334jba r chip 1/16 330k ohm j 1608 r203 hrfs181jba r chip 1/16 180 ohm j 1608 r205 hrfs752jba r chip 1/16 7.5k ohm j 1608 r206 hrfs273jba r chip 1/16 27k ohm j...

  • Page 49

    48 electrical partslist loc parts_code parts_name parts_descr remark rd54 hrfs101jba r chip 1/16 100 ohm j 1608 rd55 hrfs680jba r chip 1/16 68 ohm j 1608 rd59 hrfs750jba r chip 1/16 75 ohm j 1608 rd60 hrfs750jba r chip 1/16 75 ohm j 1608 rd62 hrfs750jba r chip 1/16 75 ohm j 1608 rd63 hrfs103jba r ch...

  • Page 50

    Loc parts_code parts_name parts_descr remark c635 cexf1c100a c electro 16v rsm 10mf 5x7 c637 cexf1c100a c electro 16v rsm 10mf 5x7 c643 cexf1c100a c electro 16v rsm 10mf 5x7 c644 cexf1c100a c electro 16v rsm 10mf 5x7 c645 cexf1a471v c electro 10v rss 470mf (8x11.5) tp c647 cexf1c100a c electro 16v r...

  • Page 51

    50 electrical partslist loc parts_code parts_name parts_descr remark cd14 cczf1h104z c cera hikf 50v 0.1mf z axial cd17 czch1h201j c cera 50v ch 200pf j (axial) cd18 cczb1h182k c cera 50v b 1800pf k (axial) cd20 cczb1h471k c cera 50v b 470pf k (axial) cd22 cczb1h471k c cera 50v b 470pf k (axial) cd2...

  • Page 52

    Loc parts_code parts_name parts_descr remark r403 rd-az122j- r carbon film 1/6 1.2k ohm j r423 rd-az153j- r carbon film 1/6 15k ohm j r512 rd-az472j- r carbon film 1/6 4.7k ohm j r513 rd-az331j- r carbon film 1/6 330 ohm j r514 rd-az331j- r carbon film 1/6 330 ohm j r525 rd-az104j- r carbon film 1/6...

  • Page 53

    52 loc parts_code parts_name parts_descr remark ca32 hcfh104zba c chip cera 25v y5v 0.1mf z 1608 ca33 hcfh104zba c chip cera 25v y5v 0.1mf z 1608 ca37 hcbk561kba c chip cera 50v x7r 560pf k 1608 ca51 hcqk101jba c chip cera 50v ch 100pf j 1608 ca52 hcqk101jba c chip cera 50v ch 100pf j 1608 ca53 hcfh...

  • Page 54

    Loc parts_code parts_name parts_descr remark da03 drls4148-b diode chip rls4148te-11 3415 db01 ddan202k-b diode chip dan202k t96 (auto) dc01 drls4148-b diode chip rls4148te-11 3415 dc03 d1sr154Ñc diode chip 1sr154-400te25 dc04 d1sr154Ñc diode chip 1sr154-400te25 dp11 d1sr154Ñc diode chip 1sr154-400t...

  • Page 55

    54 loc parts_code parts_name parts_descr remark rc27 hrfs472jba r chip 1/16 4.7k ohm j 1608 rc29 hrfs201jba r chip 1/16 200 ohm j 1608 rc30 hrfs105jba r chip 1/16 1m ohm j 1608 rc31 hrfs100jba r chip 1/16w 10 ohm j 1608 rc33 hrfs472jba r chip 1/16 4.7k ohm j 1608 rc34 hrfs103jba r chip 1/16 10k ohm ...

  • Page 56

    Loc parts_code parts_name parts_descr remark f801 5fwps2022l fuse wide tl 250v 2a case ic802 1ka431azÑ ic regulator ka431az q802 tztc3203y- tr ktc3203y (2120y) z0082 pvpwjae253 power axial auto as dc-a84d1d-nb d802 dzeg01cÑ- diode eg01c d803 dzn4003Ñ- diode in4003 d804 dzn4148Ñ- diode 1n4148 auto 52...

  • Page 57

    686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea daewoo electronics corp..