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Daewoo DG-K512 Service Manual

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Service Manual

DVD PLAYER

MODEL: DG-K512
DG-K514
DG-K515
DG-K518
Sm(DAEWOO_DG-K51X)051229.indd
1
✔ 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. 2005
2005-12-30
11:46:55

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Summary of Contents for Daewoo DG-K512

  • Page 1: Dvd Player

    Service Manual DVD PLAYER 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.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS SPECIFICATIONS.........................2 CIRCUIT OPERATIONAL DESCRIPTION..................3 VOLTAGE CHARTS........................2 CIRCUIT DIAGRAM........................3 PCB CIRCUIT BOARD.........................22 WAVEFORMS..........................32 TROUBLE SHOOTING.........................37 INSTRUMENT DISASSEMBLY......................42 PARTLIST...........................49 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:46:56...

  • Page 3: Specifications

    SPECIFICATIONS 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 level : 2.0 + 0/-0.2Vrms Analog (Load impedance : ,0KΩ) Output Audio output level : 0.5 ±0.Vp-p Digital (Load impedance : 75Ω) output level : .0 ±0.Vp-p...

  • Page 4: Circuit Operational Description

    CIRCUIT OPERATIONAL DESCRIPTION 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 controls the overall system including the loader and MPEG decoder.
  • Page 5 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 allows reading the signal of a disc using laser beam and makes it operates and consists of the deck mechanism which allows loading a disc and reading the data.
  • Page 6 CIRCUIT OPERATIONAL DESCRIPTION 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 inductance. Driver IC gener- ates the focus signal and the tracking signal for pick-up actuator, the sled signal for feed, spindle signal and the load signal for opening and closing of the tray.
  • Page 7 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 analog audio signal through the built-in encoder block and also the audio signal into the audio DAC through the audio decoder block.
  • Page 8 CIRCUIT OPERATIONAL DESCRIPTION MT389 Functional Block Diagram Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:00...
  • Page 9 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 on 52K x 6bit basis is used.
  • Page 10 CIRCUIT OPERATIONAL DESCRIPTION WRITE CONTROL PROGRAM/ERASE STATE INPUT HIGH VOLTAGE MACHINE LOGIC (WSM) STATE MX29F040 ADDRESS FLASH REGISTER ARRAY LATCH ARRAY A0-A18 SOURCE BUFFER Y-PASS GATE COMMAND DATA DECODER SENSE DATA AMPLIFIER COMMAND DATA LATCH PROGRAM DATA LATCH Q0-Q7 I/O BUFFER FLASH MX29F040QC-70 Block Diagram Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30...
  • Page 11 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 function and audio, screen saver, parental function through the I2C transmission method.
  • 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 DVD module has the capacity of 6MBit(048576 x 6bit x Bank), sends and receives data with MPEG decoder by 6 bit.

  • Page 13: Voltage Charts

    VOLTAGE CHARTS Power board output voltage Pin number Output voltage GND 3.3V +2V -2V Pin number Output voltage -24V STB5V Decode board input voltage Pin number Output voltage GND 3.3V +2V -2V Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:05...

  • Page 14: Circuit Diagram

    CIRCUIT DIAGRAM 1. POWER SUPPLY SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:06...
  • Page 15 CIRCUIT DIAGRAM 2. DECODE BOARD SCHEMATIC DIAGRAM ) INDEX SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:07...
  • Page 16 CIRCUIT DIAGRAM 2) RF & MPEG SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:11...
  • Page 17 CIRCUIT DIAGRAM 3) SDRAM & FLASH SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:14...
  • Page 18 CIRCUIT DIAGRAM 4) VIDEO OUTPUT PORT SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:16...
  • Page 19 CIRCUIT DIAGRAM 5) AUDIO OUTPUT PORT SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:21...
  • Page 20 CIRCUIT DIAGRAM 3. CONTROL BOARD SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:24...
  • Page 21 CIRCUIT DIAGRAM 4. MICROPHONE BOARD SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:25...
  • Page 22 CIRCUIT DIAGRAM 5. YUV BOARD SCHEMATIC DIAGRAM Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:26...

  • Page 23: Pcb Circuit Board

    PCB CIRCUIT BOARD 1. POWER SUPPLY BOARD Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:27...
  • Page 24 PCB CIRCUIT BOARD 2. DECODE BOARD Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:36...
  • Page 25 PCB CIRCUIT BOARD Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:40...
  • Page 26 PCB CIRCUIT BOARD 3. CONTROL BOARD (DG-K512) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:41...
  • Page 27 PCB CIRCUIT BOARD CONTROL BOARD (DG-K514) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:41...
  • Page 28 PCB CIRCUIT BOARD CONTROL BOARD (DG-K515) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:42...
  • Page 29 PCB CIRCUIT BOARD CONTROL BOARD (DG-K518) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:42...
  • Page 30 PCB CIRCUIT BOARD 4. MICROPHONE BOARD (DG-K512 and DG-K514) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:43...
  • Page 31 PCB CIRCUIT BOARD MICROPHONE BOARD (DG-K515) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:43...
  • Page 32 PCB CIRCUIT BOARD 5. YUV OUTPUT BOARD Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:44...

  • Page 33: Waveforms

    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 2005-12-30 11:47:45...
  • Page 34 WAVEFORMS CP3 Pin6 (COAXIAL OUT) 3. SYSTEM WAVEFORMS D3 Pin2 RESET & +3.3V ON/OFF Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:46...
  • Page 35 WAVEFORMS U6 Pin38(SDRAM CLOCK) CN4 Pin4(VSC) S-CLK Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:46...
  • Page 36 WAVEFORMS CN4 Pin6 (VSD) SDATA-IN CN4 Pin5 (VST) S-CS Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:47...
  • Page 37 WAVEFORMS CN4 Pin 2(IR) Y Pin (27MHz X-TAL) Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:48...

  • Page 38: Trouble Shooting

    TROUBLE SHOOTING 1. POWER CIRCUIT NO POWER POWER cord is ok Exchange POWER card Check (+) Voltage of CA3 F1 ,LA1 ,DA1~DA4 Cheack Switching Waveform of U1 U1,LA2 ,ZDA2 ,DA6 ,U2 Output voltage of Replace bad parts DB1~DB5 Check other parts Check LB1,LB2 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30...
  • Page 39 TROUBLE SHOOTING 2. CONTROL BOARD CIRCUIT NO LED display Is 5V obtained at Check pin#1 of J1 Pin#7,21 of U1 Oscillation at Check R2, exchange U1 pin#1 of U1 Is there KEY/SEG Cheack PCB signal? KEY output at Check U1 pin #6~7 PORT of U1 Check SEG/GRID output Check U1 pin#8~27...
  • Page 40 TROUBLE SHOOTING 3. VIDEO CIRCUIT NO CVBS & S-vidro & component signal appear Is signal output from Check MPEG system Y3~Y6 of Net; check module pin# 175, 179, 181, 182 of U2 (1389D) Is signal output from part Check Triode Q11, Q12, Q14, Q16, Q17 ,Q38 Check PCB pattern...
  • Page 41 TROUBLE SHOOTING 4. AUDIO OUTPUT CIRCUIT NO sound Audio Signal from Replace the U2 pin#187,189 of U2 Check inserted part: R58,C160,R223,R225,R226, Check audio signal from R57,C167,R224 R227 R228, pin#1,7 of U17 U17 and Replace bad parts Check inserted part: Check audio signal from C237,R67,R122, pin#1,7 of U11 C238,R68,R131,U11 and...
  • Page 42 TROUBLE SHOOTING 5. MPEG BOARD Check all Connectors Check +3.3v (Pin7) Check Power Circuit Check +3.3v (Pin4.5.8) +1.8V regulator(Q6 Pin3) Check Check soldering or replace it that voltage is between 1.7v-1.9v +3.3v regulator(FB L26) for Check soldering or replace it SDRAM(U6) Check +3.3V RESET Signal Check C10 ,R1...

  • Page 43: Instrument Disassembly

    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 2. Remove one screw 1. Remove one screw 3. Remove four screws, remove top cover.
  • Page 44 INSTRUMENT DISASSEMBLY B. FRONT PANEL DISASSEMBLY Remove three hooks Remove two hooks, remove panel. FIG. 2 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:50...
  • Page 45 INSTRUMENT DISASSEMBLY C. DECODE BOARD DISASSEMBLY Remove three screws Remove two screws, remove MPEG board. FIG. 3 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:50...
  • Page 46 INSTRUMENT DISASSEMBLY D. POWER SUPPLY BOARD DISASSEMBLY Remove four screws, remove power board. FIG. 4 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:50...
  • Page 47 INSTRUMENT DISASSEMBLY E. YUV OUTPUT BOARD DISASSEMBLY Remove one screw, remove YUV board. FIG. 5 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:51...
  • Page 48 INSTRUMENT DISASSEMBLY F. DVD LOADER DISASSEMBLY Remove four screws, remove DVD loader. FIG. 6 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:51...
  • Page 49 INSTRUMENT DISASSEMBLY G. REAR PANEL DISASSEMBLY Remove one screw Remove two screws, remove rear panel. FIG. 7 Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:51...

  • Page 50: Partlist

    GVG-4 CD door (silver )  230038 Mirror DG-K52(mirror face )black 2 250000 Handle white handle 3 30005 T/Cover GVG-2/4/5(silver )added DAEWOO 4 3009 B/Cover GVG-2-MTK(SANYO loader)-yingfeiling power pcb 5 3020346 R/Panel DG-K52 2.0CH MTK389D 4region 6 3500005 Screw BB3*8 3.0 audio 3...
  • Page 51 .0 for connwire of loader Sheet 32 5300423 Manual GD-K54(english ,spanish ) 33 542037 W/Card DAEWOO (DEAM-FL)model according to buyer’s require .0 DEAM-FL for PO 34 542038 W/Card DAEWOO (DEPASA)model according to buyer’s require .0 DEPASA for PO 35 5440073 Cushion 386front cushion46.6*6.6*8mm(single has sticker)rigidity 64...
  • Page 52 GVG-4 CD door (silver )  230040 Mirror DG-K55(mirror face ) black 2 250000 Handle white handle 3 30005 T/Cover GVG-2/4/5(silver)with DAEWOO 4 3002 B/Cover GVG-5-MTK(SANYO loader)-yingfeoling power pcb 5 3020345 R/Panel DG-K55 2.0CH MTK389D 4region 6 3500005 Screw BB3*8 3.0 audio 3...
  • Page 53 30 5202385 Label DG-K58(Chile)bar code label 3 5300530 Manual DG-K58 32 542068 W/Card DAEWOO peru W/Card 4edition 33 5440073 Cushion 386 front cushion 46.6*6.6*8mm(single has sticker) rigidity64 34 5440074 Cushion 386rear cushion 5.5mm,thickness 3mm(single has sticker)rigidity 64 2.0 35 544029 Cushion 20x0x2mm(single has sticker)EVI rigidity 60 2.0 loader...
  • Page 54 PARTSLIST MPEG PCB Assy Material List Code: 5700234 (DG-K52/DG-K54/DG-K55) No Part Code Part Name SPEC 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% 0603 4.0 R7,R72,R73,R74 4 0050006 R Chip...
  • Page 55 PARTSLIST No Part Code Part Name SPEC 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...
  • Page 56 PARTSLIST No Part code Part Name SPEC Location 94 505 Conn Wafer S-video (plus fixed pin)DSW-007 .0 CP 95 5086 Conn Wafer FPC upright /-24Pin 0.5mm plus .0 CN5(towards PCB inside) iron cover Sm(DAEWOO_DG-K51X)051229.indd 2005-12-30 11:47:58...
  • Page 57 PARTSLIST Code: 5700255 (DG-K58) No Part Code Part Name SPEC 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 ±5% 0603...
  • Page 58 PARTSLIST No Part Code Part Name SPEC 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...
  • Page 59 PARTSLIST POWER PCB Assy Material List Code: 5750046 NO Part Code Part Name SPEC 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...
  • Page 60 PARTSLIST Front Panel Assy Material List Code: 5780248(DG-K52) No Part Code Part Name SPEC Location  290024 Lead 8#single line 80mm 2 2000287 F/Panel GVG-2 (silver )new 3 200236 Knob GVG-2 power knob 4 200237 Knob GVG-2 play knob 5 2200034 Knob 8500 potentiometer knob(silver) 6 350000 Screw BB3*6...
  • Page 61 PARTSLIST Code: 5780278(DG-K58) No Part Code Part Name SPEC Location  290024 Lead 8#single line 80mm 2 2000296 F/Panel GVG-8(silver ) 3 200256 Knob GVG-8 power knob 4 200257 Knob GVG-8 function knob 5 220023 Indicator Light Cap GVG-8 LED 6 3500084 Screw BB3*8 Ø5 4.0 control pcb 0,housing 4...
  • Page 62 PARTSLIST Control PCB Assy Material List Code: 573030(DG-K52) No Part Code Part Name SPEC 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%...
  • Page 63 PARTSLIST Code: 573032(DG-K55) No Part Code Part Name SPEC Location  0000005 R Carbon Film /6W 0K ±5% R3,R4,R5,R6,R 2 000009 R Carbon Film /6W 5K ±5% 3 000042 R Carbon Film /6W 00E ±5% 4 050007 C Cera 0 50V ±0% C3,C4,C5 5 05200 C Cera 04 50V -20%+80% F5 D6...
  • Page 64 PARTSLIST MIC PCB Assy Material List Code: 570066 (DG-K52 and DG-K54) No Part Code Part Name SPEC 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 Code: 570067 (DG-K58) No Part Code Part Name SPEC 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%...
  • Page 66 YUV PCB Assy Material List Code: 576002 No Part Code Part Name SPEC Location  090025 C Electro 0V 470UF ±20% D8 3.0 C.C2.C3 2 00030 PCB OGVG004 REV:B. YUV PCB 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...

This manual is also suitable for:

Dg-k514Dg-k515Dg-k518

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