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Daewoo DG-K512 Service Manual - Dvd Audio Output Standards

Summary of DG-K512

  • Page 1

    Service manual model: dg-k512 dg-k514 dg-k515 dg-k518 ✔ 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 information,please refer to ppl(parts price list) in service information center. December. 2...

  • Page 2

    Contents contents specifications.........................................................................................................................2 circuit operational description.........................................................................................3 voltage charts............

  • Page 3: Dvd Audio Output Standards

    2 laser wavelength 650nm video pal/auto/ntsc frequency response 20hz ~ 20khz (±db) signal/noise ratio ≥90db channel separation ≥85db ( khz) dynamic range ≥80db ( khz) output audio analog output level : 2.0 + 0/-0.2vrms (load impedance : ,0kΩ) digital output level : 0.5 ±0.Vp-p (load impedance : 75Ω)...

  • Page 4

    3 dvd module . Summary dvd one board consists of: loader part that reads and transmits audio and video data saved at optic discs (dvd, cd-da, vcd, cd-r) to mpeg decoder part; mpeg decoder part, which, by decoding and encoding data received from the loader, produces analog signals; and u-com that con...

  • Page 5

    4 circuit operational description circuit operational description 3. Loader part the loader which read the data of audio/video from optic disc and transfer them to mpeg decoder can be divided into deck total dvd assay(in a short term, mecha) and servo. Mecha mounts with the optical pick-up which all...

  • Page 6

    5 circuit operational description ) motor drive ic: at5888s the at5868s is a 5-channel btl driver ic for driving the motors and actuators in products such as cd-rom/dvd-rom/dvd-player drives. Two of the channels use current feedback to minimize the current phase shift caused by the influence of load...

  • Page 7

    6 circuit operational description mpeg decoder the signal read from dvd disc is output into the rf signal and servo related signal through the rf ic and they are input into the mpeg decoder and processed the mpeg decoding and divided into video/audio signal. The video signal is output into the analo...

  • Page 8

    7 circuit operational description mt389 functional block diagram sm(daewoo_dg-k51x)051229.Indd 7 2005-12-30 11:47:00

  • Page 9

    8 circuit operational description 2) flash memory : mx29f040qc-70 this stores every program required for the operation of dvd player and holds the data of osd languages and logo and send them upon request from u-com. This allows the update of firmware by cd-r/rw. For dvd module, 8mbit flash memory o...

  • Page 10

    9 circuit operational description control input logic program/erase high voltage write state machine (wsm) state register mx29f040 flash array r e d o c e d- x address latch and buffer y-pass gate r e d o c e d- y array source hv command data decoder command data latch i/o buffer pgm data hv program...

  • Page 11

    0 circuit operational description 3) eeprom : at24c6a this stores the information related to setup of dvd menus. This can read and write the op- tional information such as osd, voice, language option after function for subtitle etc, the aspect or method of tv display, video option like display funct...

  • Page 12

    Circuit operational description 4) sdrom : m2l66a-7t this sends and receives data with mpeg decoder and performs the video signal processing. Every video signal output from dvd player is once stored in sdram and then encoded in mpeg decoder and finally output into the analog signal. Sdram applied to...

  • Page 13

    2 power board output voltage j pin number 2 3 4 5 6 7 8 9 output voltage gnd s5v 3.3v d5v gnd a5v gnd +2v -2v j2 pin number 2 3 4 5 6 output voltage sw f- f+ gnd -24v stb5v decode board input voltage cn pin number 2 3 4 5 6 7 8 9 output voltage gnd s5v 3.3v d5v gnd a5v gnd +2v -2v voltage charts sm(...

  • Page 14

    3 circuit diagram 1. Power supply schematic diagram sm(daewoo_dg-k51x)051229.Indd 13 2005-12-30 11:47:06.

  • Page 15

    Circuit diagram 4 2. Decode board schematic diagram ) index schematic diagram sm(daewoo_dg-k51x)051229.Indd 14 2005-12-30 11:47:07.

  • Page 16

    Circuit diagram 5 2) rf & mpeg schematic diagram sm(daewoo_dg-k51x)051229.Indd 15 2005-12-30 11:47:11.

  • Page 17

    Circuit diagram 6 3) sdram & flash schematic diagram sm(daewoo_dg-k51x)051229.Indd 16 2005-12-30 11:47:14.

  • Page 18

    Circuit diagram 7 4) video output port schematic diagram sm(daewoo_dg-k51x)051229.Indd 17 2005-12-30 11:47:16.

  • Page 19

    Circuit diagram 8 5) audio output port schematic diagram sm(daewoo_dg-k51x)051229.Indd 18 2005-12-30 11:47:21.

  • Page 20

    Circuit diagram 9 3. Control board schematic diagram sm(daewoo_dg-k51x)051229.Indd 19 2005-12-30 11:47:24.

  • Page 21

    Circuit diagram 20 4. Microphone board schematic diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 40 0 g v g k 1. 1 a ci t a m e h c s e k o a r a k 30 13- v d 3 a 2 2 50 02 ,2 1 hcr a m , ya dr ut a s elti t ve r re b mu n t ne mu co d ezi s te eh s :et a d fo 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 v6 1/ f u...

  • Page 22

    Circuit diagram 2 5. Yuv board schematic diagram sm(daewoo_dg-k51x)051229.Indd 21 2005-12-30 11:47:26.

  • Page 23

    22 pcb circuit board 1. Power supply board sm(daewoo_dg-k51x)051229.Indd 22 2005-12-30 11:47:27.

  • Page 24

    Pcb circuit board 23 2. Decode board sm(daewoo_dg-k51x)051229.Indd 23 2005-12-30 11:47:36.

  • Page 25

    Pcb circuit board 24 sm(daewoo_dg-k51x)051229.Indd 24 2005-12-30 11:47:40

  • Page 26

    Pcb circuit board 25 3. Control board (dg-k512) sm(daewoo_dg-k51x)051229.Indd 25 2005-12-30 11:47:41.

  • Page 27

    Pcb circuit board 26 control board (dg-k514) sm(daewoo_dg-k51x)051229.Indd 26 2005-12-30 11:47:41.

  • Page 28

    Pcb circuit board 27 control board (dg-k515) sm(daewoo_dg-k51x)051229.Indd 27 2005-12-30 11:47:42.

  • Page 29

    Pcb circuit board 28 control board (dg-k518) sm(daewoo_dg-k51x)051229.Indd 28 2005-12-30 11:47:42.

  • Page 30

    Pcb circuit board 29 4. Microphone board (dg-k512 and dg-k514) sm(daewoo_dg-k51x)051229.Indd 29 2005-12-30 11:47:43.

  • Page 31

    Pcb circuit board 30 microphone board (dg-k515) sm(daewoo_dg-k51x)051229.Indd 30 2005-12-30 11:47:43.

  • Page 32

    Pcb circuit board 3 5. Yuv output board sm(daewoo_dg-k51x)051229.Indd 31 2005-12-30 11:47:44.

  • Page 33

    32 waveforms 1. Video cp3 pin5 (color bar_video out) cvbs 2. Audio cp3 pin 7&8(khz_ audio out) sm(daewoo_dg-k51x)051229.Indd 32 2005-12-30 11:47:45.

  • Page 34

    Waveforms 33 cp3 pin6 (coaxial out) 3. System waveforms d3 pin2 reset & +3.3v on/off sm(daewoo_dg-k51x)051229.Indd 33 2005-12-30 11:47:46.

  • Page 35

    Waveforms 34 u6 pin38(sdram clock) cn4 pin4(vsc) s-clk sm(daewoo_dg-k51x)051229.Indd 34 2005-12-30 11:47:46.

  • Page 36

    Waveforms 35 cn4 pin6 (vsd) sdata-in cn4 pin5 (vst) s-cs sm(daewoo_dg-k51x)051229.Indd 35 2005-12-30 11:47:47.

  • Page 37

    Waveforms 36 cn4 pin 2(ir) y pin (27mhz x-tal) sm(daewoo_dg-k51x)051229.Indd 36 2005-12-30 11:47:48.

  • Page 38

    37 trouble shooting 1. Power circuit yes yes yes yes yes no no no no no no power power cord is ok exchange power card (+) voltage of ca3 check f1 ,la1 ,da1~da4 switching waveform of u1 cheack u1,la2 ,zda2 ,da6,u2 output voltage of db1~db5 replace bad parts check other parts check lb1,lb2 sm(daewoo_d...

  • Page 39

    Trouble shooting 38 2. Control board circuit yes yes yes yes yes no no no no no yes n o no led display is 5v obtained at pin#7,21 of u1 check pin#1 of j1 oscillation at pin#1 of u1 check r2, exchange u1 is there key/seg signal? Cheack pcb key output at port of u1 check u1 pin #6~7 check seg/grid out...

  • Page 40

    Trouble shooting 39 3. Video circuit yes yes yes no no no cvbs & s-vidro & component signal appear is signal output from y3~y6 of net; check pin# 175, 179, 181, 182 of u2 (1389d) check mpeg system module is signal output from part q11, q12, q14, q16, q17 ,q38 check triode check pcb pattern sm(daewoo...

  • Page 41

    Trouble shooting 40 4. Audio output circuit yes yes yes no no no no yes no sound audio signal from pin#187,189 of u2 replace the u2 check audio signal from pin#1,7 of u17 check inserted part: r58,c160,r223,r225,r226, r57,c167,r224 r227 r228, u17 and replace bad parts check parts: c233,r201,q36,l49, ...

  • Page 42

    Trouble shooting 4 5. Mpeg board yes no yes no yes no yes no yes no no no check soldering or replace it +1.8v regulator(q6 pin3) check that voltage is between 1.7v-1.9v check all connectors cn1 check +3.3v (pin7) check +3.3v (pin4.5.8) check power circuit +3.3v regulator(fb l26) for sdram(u6) check ...

  • Page 43

    42 instrument 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. A. Top cover removal fig. 1 3. Remove four screws, remove top cover. 2. Remove one screw 1. Remo...

  • Page 44

    Instrument disassembly 43 b. Front panel disassembly remove three hooks remove two hooks, remove panel. Fig. 2 sm(daewoo_dg-k51x)051229.Indd 43 2005-12-30 11:47:50

  • Page 45

    Instrument disassembly 44 c. Decode board disassembly fig. 3 remove two screws, remove mpeg board. Remove three screws sm(daewoo_dg-k51x)051229.Indd 44 2005-12-30 11:47:50

  • Page 46

    Instrument disassembly 45 remove four screws, remove power board. D. Power supply board disassembly fig. 4 sm(daewoo_dg-k51x)051229.Indd 45 2005-12-30 11:47:50

  • Page 47

    Instrument disassembly 46 e. Yuv output board disassembly remove one screw, remove yuv board. Fig. 5 sm(daewoo_dg-k51x)051229.Indd 46 2005-12-30 11:47:51.

  • Page 48

    Instrument disassembly 47 remove four screws, remove dvd loader. F. Dvd loader disassembly fig. 6 sm(daewoo_dg-k51x)051229.Indd 47 2005-12-30 11:47:51.

  • Page 49

    Instrument disassembly 48 g. Rear panel disassembly fig. 7 remove one screw remove two screws, remove rear panel. Sm(daewoo_dg-k51x)051229.Indd 48 2005-12-30 11:47:51.

  • Page 50: Set Material List

    49 set material list code: 6020584 (dg-k52) no part code part name spec qty location 090000 battery 7# no hg 2.0 2 0000 ferrite core outside 28mm inside 6mm high 7.5mm .0 power cord need process 3 27000 tie black tie 20mm .0 for power cord 4 270002 tie nylon tie 80mm 3.0 5 304 conn wire 2.54double 9...

  • Page 51

    Partslist 50 code: 6020585 (dg-k54) no part code part name spec qty location 090000 battery 7# no hg 2.0 2 0000 ferrite core outside 28mm inside 6mm high 7.5mm .0 power cord need process 3 27000 tie black tie 20mm .0 for power cord 4 270002 tie nylon tie 80mm 3.0 5 304 conn wire 2.54double 9p*350mm,...

  • Page 52

    Partslist 5 code: 6020586 (dg-k55) no part code part name spec qty location 090000 battery 7# no hg 2.0 2 0000 ferrite core outside 28mm inside 6mm high 7.5mm .0 power cord need process 3 27000 tie black tie 20mm .0 for power cord 4 270002 tie nylon tie 80mm 3.0 5 304 conn wire 2.54double 9p*350mm,r...

  • Page 53

    Partslist 52 code: 6020643 (dg-k58) no part code part name spec qty location 090000 battery 7# no hg 2.0 2 0000 ferrite core outside 28mm inside 6mm high 7.5mm .0 power cord need process 3 27000 tie black tie 20mm .0 for power cord 4 270002 tie nylon tie 80mm 3.0 5 304 conn wire 2.54double 9p*350mm,...

  • Page 54: Mpeg Pcb Assy Material List

    Partslist 53 mpeg pcb assy material list code: 5700234 (dg-k52/dg-k54/dg-k55) no part code part name spec qty location 005000 r chip /6w 0e ±5% 0603 9.0 r4,r7,r5,r6,r24,r25,r26,r32,r33,r34,r37,r50,r53,r6,r8 ,r57,r58,r22,r3 2 0050002 r chip /6w 0e ±5% 0603 2.0 r27,r90 3 0050004 r chip /6w 33e ±5% 060...

  • Page 55

    Partslist 54 no part code part name spec qty location 47 0200005 c chip 27p 50v ±0% 0603 .0 c56 48 0200008 c chip 0 50v ±0% 0603 3.0 c67,c209,c230 49 020004 c chip 47 50v ±0% 0603 4.0 c27,c3,c29,c32 50 020005 c chip 53 50v ±0% 0603 .0 c90 5 020006 c chip 333 50v ±0% 0603 .0 c45 52 020007 c chip 03 5...

  • Page 56

    Partslist 55 no part code part name spec qty location 94 505 conn wafer s-video (plus fixed pin)dsw-007 .0 cp 95 5086 conn wafer fpc upright /-24pin 0.5mm plus iron cover .0 cn5(towards pcb inside) sm(daewoo_dg-k51x)051229.Indd 55 2005-12-30 11:47:58.

  • Page 57

    Partslist 56 code: 5700255 (dg-k58) no part code part name spec qty location 005000 r chip /6w 0e ±5% 0603 9.0 r4,r7,r5,r6,r24,r25,r26,r37,r50,r53,r6,r8,r57,r58,r22, r3,r33,r34,r32 2 0050002 r chip /6w 0e ±5% 0603 .0 r27 3 0050004 r chip /6w 33e ±5% 0603 4.0 r7,r72,r73,r74 4 0050006 r chip /6w 75e ±...

  • Page 58

    Partslist 57 no part code part name spec qty location 5 020007 c chip 03 50v ±0% 0603 .0 c26 52 020002 c chip u 0v ±0% 0603 5.0 c59,c60,c6,c63,c64 53 020003 c chip 473 50v ±0% 0603 2.0 c47,c46 54 0200032 c chip 222 50v ±0% 0603 3.0 c2,c27,c36, 55 020004 c chip 52 50v ±0% 0603 .0 c34 56 020006 c chip...

  • Page 59

    Partslist 58 power pcb assy material list code: 5750046 no part code part name spec qty location 0000005 r carbon film /6w 0k ±5% .0 ra8 near zd2 2 00002 r carbon film /8w k ±5% .0 rb9 3 000092 r carbon film /8w 470e ±5% .0 rb8 4 000096 r carbon film /4w 430k ±5% 2.0 ra2,ra3 5 000097 r carbon film /...

  • Page 60

    Partslist 59 front panel assy material list code: 5780248(dg-k52) no part code part name spec qty location 290024 lead 8#single line 80mm .0 2 2000287 f/panel gvg-2 (silver )new .0 3 200236 knob gvg-2 power knob .0 4 200237 knob gvg-2 play knob .0 5 2200034 knob 8500 potentiometer knob(silver) 2.0 6...

  • Page 61

    Partslist 60 code: 5780278(dg-k58) no part code part name spec qty location 290024 lead 8#single line 80mm .0 2 2000296 f/panel gvg-8(silver ) .0 3 200256 knob gvg-8 power knob .0 4 200257 knob gvg-8 function knob .0 5 220023 indicator light cap gvg-8 led .0 6 3500084 screw bb3*8 Ø5 4.0 control pcb ...

  • Page 62

    Partslist 6 control pcb assy material list code: 573030(dg-k52) no part code part name spec qty location 0000005 r carbon film /6w 0k ±5% 5.0 r,r3,r4,r5,r6 2 000009 r carbon film /6w 5k ±5% .0 r2 3 000042 r carbon film /6w 00e ±5% .0 r7 4 050007 c cera 0 50v ±0% 3.0 c3,c4,c5 5 05200 c cera 04 50v -2...

  • Page 63

    Partslist 62 code: 573032(dg-k55) no part code part name spec qty location 0000005 r carbon film /6w 0k ±5% 5.0 r3,r4,r5,r6,r 2 000009 r carbon film /6w 5k ±5% .0 r2 3 000042 r carbon film /6w 00e ±5% .0 r7 4 050007 c cera 0 50v ±0% 3.0 c3,c4,c5 5 05200 c cera 04 50v -20%+80% f5 d6 .0 c 6 090030 c e...

  • Page 64: Mic Pcb Assy Material List

    Partslist 63 mic pcb assy material list code: 570066 (dg-k52 and dg-k54) no part code part name spec qty location 0000002 r carbon film /6w k ±5% 3.0 r8,r2,r26 2 0000004 r carbon film /6w 4.7k ±5% .0 r2 3 0000005 r carbon film /6w 0k ±5% 5.0 r7,r0,r29,r23,r5 4 000003 r carbon film /6w .5k ±5% .0 r3 ...

  • Page 65

    Partslist 64 code: 570067 (dg-k58) no part code part name spec qty location 0000002 r carbon film /6w k ±5% 3.0 r8,r2,r26 2 0000004 r carbon film /6w 4.7k ±5% .0 r2 3 0000005 r carbon film /6w 0k ±5% 5.0 r5,r7,r0,r23,r29 4 000003 r carbon film /6w .5k ±5% .0 r3 5 000005 r carbon film /6w 5k ±5% .0 r...

  • Page 66: Yuv Pcb Assy Material List

    65 yuv pcb assy material list code: 576002 no part code part name spec qty location 090025 c electro 0v 470uf ±20% d8 3.0 c.C2.C3 2 00030 pcb ogvg004 rev:b. Yuv pcb .0 3 506 conn wafer 3pin av3-8.4-0d-f pin 3.6mm .0 rca 4 30273 conn wafer 2.0 double 6p*60mm red white conn wafer3p .0 cn sm(daewoo_dg-...