Daewoo DV6T112D Service Manual Download

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686, AHYEON-DONG MAPO-GU
SEOUL, KOREA
C.P.O. BOX 8003 SEOUL, KOREA
TELEX : DWELEC K28177-8
CABLE : "DAEWOOELEC"
E-mail : [email protected]
TEL : 82-2-360-7798
FAX : 82-2-360-7877

DAEWOO ELECTRONICS CO., LTD.

Summary of Contents for DV6T112D

Page 1: ...LE PBC MENU PR PR OUTPUT PREV REC PROGRAM CLK CNT SPEED ANGLE TRACKING TV VCR MARK SEARCH SYSTEM PLAY PAUSE NEXT ZOOM AUDIO SUBTITLE RE TU RN O K CL EA R 3D SETUP ENTER 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 http s...

Page 2: ...1 SPECIFICATIONS 2 ADVANTAGES OF THIS PRODUCT 3 TROUBLE SHOOTING 5 WAVEFORMS 25 CIRCUIT DIAGRAM 28 PCB CIRCUIT BOARD 34 INSTRUMENT DISASSEMBLY 37 ELECTRICAL PARTSLIST 45 CONTENTS ...

Page 3: ... VCR 2Vrms DVD RCA JACK AUDIO output DVD only Analogue AUDIO output 2 0Vrms Digital audio output OPTICAL COAXIAL Playable tape Very high dense tapes with VHS marks Playable disc DVD VIDEO CD CD 12mm CD 8mm MP3 CD R CD RW Tape speed SP 23 39mm s LP 11 70mm s Playtime SP 3hrs LP 6hrs use of E180tape Clock display 24 hrs Time Recording 8 programs a year Persistence in power failure 1min VIDEO S N VCR...

Page 4: ...On Screen Display By using the DISPLAY button on the remote control information on the DVD VCD CD player and disc can be displayed on the TV screen Screensaver function DVD 3D sound 3D sound effect using 2 speakers High bit High sampling with 27MHz 10bit video encoder High bit High sampling with 96MHz 24bit Audio D A Converter Coaxial Optical digital Audio output PCM Dolby Digital dts You can enjo...

Page 5: ...nd display OSD in 7 languages E F S G I D P Parental Lock function DVD This function can prevent playback of software that may be unsuitable for children Multi Audio function DVD The audio soundtrack can be heard in up to 12 languages In the case of SVCD or VCD it depends on the disc The number of audio languages depends on the software Multi Subtitle function DVD The subtitle can be seem in up to...

Page 6: ... ok Is 400 200V voltage obtained at C805 Output voltage of 2nd parts is normal Check rectifier diode of 2nd parts D821 D822 D823 D825 D826 D827 Switching pulse of IC801 pin 4 or pin 5 is normal OK Exchange POWER CORD Check F801 L801 L802 D801 Exchange rectifier diode of 2nd parts D821 D822 D823 D825 D826 D827 Check IC801 NO YES YES YES YES YES NO NO NO NO ...

Page 7: ...n 9 25 Oscillation at IC701 pin 1 Specific GRID SEG doesn t function Check R705 L601 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 at PORT of IC701 YES SEG output at PORT of IC701 Exchange IC601 YES A LED DISPLAY NO ...

Page 8: ...pensation Voltage of power fail IC601 pin 3 at micom is 0 7V over More than 3 2V is maintained for 1 minutes at IC601 pin 37 during Power Cord Open Check R644 NO YES B No power compensation YES Check RESET circuit NO Exchange IC601 ...

Page 9: ...theheightofCTLHEADnormal Nodust Is there problem in CTL Input circuit and amplifier YES NO NO NO Is there CTL pulse at IC601 pin 97 Check IC601 Noise appears on the screen even though changing tape Re adjust the height of AC HEAD Remove the dust Check C651 C652 R651 R653 IC601 pin 91 92 98 NO Re adjust PATH C 1 Bad playback quality 1 YES YES YES YES ...

Page 10: ... at IC601 pin 16 18 Check PCB Pattern Check IC601 C 2 Bad playback quality 2 No broadcasting signal received Is the output at IC601 pin 71 CLK 72 DATA normal Is SIF Video output at TMI RF101 pin 18 20 normal Check IC 601 Check IC301 Check IC601 YES YES NO NO NO Is Video Signal input at IC601 pin 50 Is there Video output at IC601 pin 52 Check TMI RF101 Block NO Check Video Buffer Q156 Q157 D No bro...

Page 11: ... 12V voltage obtained at Each parts of Loading Motor Replace Loading Motor Check D851 and POWER circuit E No CASSETTE Loading YES YES F AUTO STOP in Playback mode VCR stops automatically in playback mode Check R656 C659 and P603 pin 11 Check S603 S604 REEL Sensor Is D PG FG pulse at IC601 pin 90 normal Is C FG pulse at IC601 pin 87 normal Is there REEL Pulse at IC601 pin 79 80 Check and replace IC...

Page 12: ...ge obtained at P603 pin 9 Check P603 Connector and Capstan Motor Check 14V Q856 Q857 Q852 Check Capstan FG IC 601 87 Check R665 R664 R663 R666 C665 Check R661 R667 C664 DRUM Motor stops Is 13V voltage obtained at P603 pin 8 YES NO NO NO YES YES Is DRUM PWM fit to IC 601 pin 76 Is 1 2V voltage obtained at P603 pin 12 Check Capstan Motor and DRUM Motor Check ON OFF 13V D851 Q856 Check DRUM PG FG IC ...

Page 13: ... JACK and IF circuit Check DVD circuit NO A EE screen doesn t appear YES NO YES NO YES NO YES NO YES NO YES NO YES YES NO Is signal input at IC601 pin 50 Check PCB Pattern Is signal output at IC302 pin 3 Check IC302 pin 16VCC Check IC302 pin 9 10 11 control DC Is signal output at IC601 pin 52 Check IC604 pin 3 C sync Is signal output at IC301 pin 62 63 Check VCC of IC301 and pin 68 69 Check RF Out...

Page 14: ...s Video signal input at IC601 pin 50 Is 5V obtained at IC301 pin 91 Is SW Pulse input at IC301 pin 70 Is 5V obtained at IC301 pin 24 42 55 64 Check POWER 5V Check IC601 pin 18 Check and Replace HEAD Check POWER 5V YES NO NO Does X301 4 43MHz oscillate Check Pattern NO NO NO YES NO NO YES YES YES YES Replace X301 Is Video signal output at IC301 pin 65 Check IC301 pin 62 68 69 70 NO YES Check PCB pa...

Page 15: ...t IC301 pin 70 Is REC signal input at IC301 pin 94 95 89 90 EP MODE 89 90 Pin SP MODE 94 95Pin Check HEAD and Connector Is signal input at IC301 pin 48 50 52 54 Check POWER circuit Check IC601 pin 22 Check IC601 pin 18 No recording Check EE MODE YES Is FM signal output at IC301 pin 78 Replace IC301 NO NO YES C No recording ...

Page 16: ...eo signal input at IC601 pin 50 Check POWER circuit No OSD appears Is 5V obtained at IC601 pin 53 98 99 Is Video signal output at IC601 pin 52 NO Check IC 301 D No OSD On Screen Display appears YES YES NO Check IC 601 Check IC 601 ...

Page 17: ...1 RF101 block Is 12V obtained at IC252 pin 16 Is RF Audio signal output at IC252 pin 3 13 Check POWER circuit NO YES NO IC601 pin 31 is H pin 21 is H Is about 8V obtained at IC252 pin 9 Is about 8V obtained at IC252 pin 10 YES Check IC601 Check R646 R647 NO NO C at Q904 is L or H YES Check IC601 Check Output JACK H H L YES Check Q904 Q905 R937 R938 R939 L Replace IC252 YES ...

Page 18: ...io signal output at IC252 pin 3 13 Check POWER circuit YES NO IC601 pin 31 is H pin 21is L Is about 8V obtained at IC252 pin 9 Is about 3 5V obtained at IC252 pin 10 YES Replace IC252 Check IC601 Check R646 R647 R911 R913 NO NO NO C at Q904 is L or H YES Check IC601 Check Output JACK Check Q904 Q905 R9 37 R938 R939 H H L L YES YES No sound in AV1 E E mode ...

Page 19: ...s about 3 5V obtained at IC252 pin 10 Replace IC252 Check IC601 Check R646 R647 R911 R913 NO NO C at Q904 is L or H YES Check IC601 Check Output JACK Check Q904 Q905 R937 R938 R939 H H L L YES YES YES A c AV2 E E No sound in AV2 E E mode Is 12V obtained at IC251 pin 34 NO Is 5V obtained at IC251 pin 40 Check POWER circuit YES NO Are CLK and DATA obtained at IC251 pin 42 43 Check Input JACK Scart A...

Page 20: ... IC251 IC252 Is 12V obtained at IC252 pin 16 Is AV F Audio signal output at IC252 pin 3 13 Check POWER circuit NO YES NO IC601 pin 31 is L pin21 is H Is about 3 5V obtained at IC252 pin 9 Is about 8V obtained at IC252 pin 10 YES Replace IC252 Check IC601 Check R923 R924 R925 R926 NO NO C at Q904 is L or H YES Check IC601 Check Output JACK Check Q904 Q905 R937 R938 R939 H H L L YES YES IC601 pin 32...

Page 21: ... IC253 IC252 Is 12V obtained at IC252 pin 16 Is DVD Audio signal output at IC252 pin 3 13 Check POWER circuit NO YES NO IC601 pin 31 is L pin 21 is H Is about 3 5V obtained at IC252 pin 9 Is about 8V obtained at at IC 252 pin 10 YES Replace IC252 Check IC601 Check R923 R924 R925 R926 NO NO C at Q904 is L or H YES Check IC601 Check Output JACK Check Q904 Q905 R937 R938 R939 H H L L YES YES IC601 pi...

Page 22: ...t IC251 pin 16 17 Replace IC251 NO Is there Audio at IC252 pin 1 12 Check signal flow circuit from IC251 to IC252 NO Check POWER circuit NO YES YES C at Q904 is L or H Check MUTE circuit H L YES YES YES Check OutputJACK B No Hi Fi playback audio PLAY MODE Is there A SW signal at IC251 pin 41 Check A SW at IC601 pin 19 NO Is about 3 5V obtained at IC252 pin 9 10 Check R646 R647 R911 R913 NO YES ...

Page 23: ... YES NO NO NO Is there FM OSC signal at IC251 pin 36 Is there FM OSC signal at P301 pin 2 Check IC601 pin 22 C No Hi Fi Audio in record playback mode REC MODE YES YES Replace DRUM NO HEAD Cleaning YES D No sound in broadcasting Stereo Is 5V obtained at IC121 pin 1 11 33 Oscillation of IC121 pin 5 6 YES NO NO NO YES YES Is SIF output from RF101 pin 22 to IC121 pin 2 Is AUDIO output at IC121 pin 26 ...

Page 24: ...s there playback Audio signal at IC301 pin 11 Check R646 R647 R911 R913 YES NO NO Is about 3 5V obtained at IC252 pin 9 10 Check A C HEAD Check IC301 YES Replace IC252 YES Is there siganl at IC252 pin 3 13 NO Check POWER circuit NO Signal at IC251 pin 21 is transferred to IC301 pin 13 15 17 ...

Page 25: ...IC251 pin 21 is transferred to IC301 pin 13 15 17 Collect signal at Q203 is 70KHz about 70Vp_p Check IC251 YES YES Check Q202 NO Check P201 pin 2 4 8 and A C HEAD YES REC H BASE voltage at Q201 is 5V Check IC601 pin 22 NO YES IC251 pin 2 3 IC251 pin 6 7 IC251 pin 10 11 IC251 pin 4 5 IC251 pin 8 9 Is there Audio signal Check Input AV1 JACK Check Input AV F JACK Check ICD03 DVD Block Check Input AV2...

Page 26: ...MS 1 VIDEO 480 8 4 4 SP IC301 88 89 3 0Vp p EP IC301 94 95 2 2 Vp p 1V 10msec cm REC 6 6 IC604 3 IC301 63 or 61 IC302 14 IC301 63 or 61 IC302 14 IC301 70 0 5 5msec cm SP PLAY REC IC301 70 0 5 5msec cm EP PLAY REC ...

Page 27: ...26 WAVEFORMS 15 9 P201 2 2 AUDIO 2 1 AUDIO Mono ...

Page 28: ...c cm REC PLAY IC601 18 5Vp p 2V 5msec cm REC PLAY IC601 77 5Vp p sec cm REC PLAY IC601 76 5Vp p 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 2msec cm REC PLAY 3 SERVO SYSCON ...

Page 29: ...28 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM PAL COMBO ...

Page 30: ...29 CIRCUIT DIAGRAM 2 AV CIRCUIT DIAGRAM ...

Page 31: ...30 3 SERVO SYSCON SCHEMATIC DIAGRAM CIRCUIT DIAGRAM ...

Page 32: ...31 4 DIGITAL AUDIO SCHEMATIC DIAGRAM CIRCUIT DIAGRAM ...

Page 33: ...32 5 HI FI SW CIRCUIT DIAGRAM CIRCUIT DIAGRAM ...

Page 34: ...33 CIRCUIT DIAGRAM 6 IF MPX PDC INPUT OUTPUT SCHEMATIC DIAGRAM ...

Page 35: ...34 PCB CIRCUIT BOARD 1 1 VCR MAIN ...

Page 36: ...35 PCB CIRCUIT BOARD 1 2 POWER ...

Page 37: ...36 PCB CIRCUIT BOARD 1 3 LOGIC ...

Page 38: ...K 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 FIG 2 A LEG REMOVAL B TOP COVER REMOVAL ...

Page 39: ...38 INSTRUMENT DISASSEMBLY FIG 3 C PANEL FRONT DISASSEMBLY ...

Page 40: ...39 INSTRUMENT DISASSEMBLY FIG 4 D LOGIC PCB DISASSEMBLY ...

Page 41: ...40 INSTRUMENT DISASSEMBLY FIG 5 E DECK AND MAIN PARTS DISASSEMBLY ...

Page 42: ...41 INSTRUMENT DISASSEMBLY FIG 6 F MAIN PCB DISASSEMBLY ...

Page 43: ...42 INSTRUMENT DISASSEMBLY FIG 7 G MAIN CHASSIS DISASSEMBLY ...

Page 44: ...43 INSTRUMENT DISASSEMBLY FIG 8 ...

Page 45: ...STB1 SLKQ1 SECAMMONO S603 97P0S02500 SENSORREEL RPI 303N S604 97P0S02500 SENSORREEL RPI 303N SW601 5SD0101100 SWDETE MXS00921MPC0 SW651 5S10104100 SWMODE MMS00402ZMB0 X121 5XJ18R4LAE CRYSTALQUARTZ HC 49 S18 43200MHZ30PP HI FI X601 5XZR03276G CRYSTALQUARTZ SO 2632 768000KHZ10PPM X602 5XJ17R7LAD CRYSTALQUARTZ HC 49 S17 73447MHZ25PPM Z0011 PVMPJ1E200 MAINCHIPMOUNTA DV6T712D AQ C102 HCBK103KBA CCHIPCE...

Page 46: ... HCFH104ZBA CCHIPCERA 25VY5V0 1MFZ1608 SECAM C366 HCBK103KBA CCHIPCERA 50VX7R0 01MFK1608 SECAM C372 HCBK103KBA CCHIPCERA 50VX7R0 01MFK1608 SECAM C376 HCBK103KBA CCHIPCERA 50VX7R0 01MFK1608 SECAM LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK C386 HCQK330JBA CCHIPCERA 50VCH33PFJ1608 C387 HCQK330JBA CCHIPCERA 50VCH33PFJ1608 C603 HCFH104ZBA CCHIPCERA 25VY5V0 1MFZ1608 C604 HCFH104ZBA CCHIPCERA 25VY5V0 1...

Page 47: ...1608 R202 HRFS113JBA RCHIP 1 16 11KOHMJ1608 LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R203 HRFS334JBA RCHIP 1 16 330KOHMJ1608 R204 HRFS201JBA RCHIP 1 16 200OHMJ1608 R205 HRFS303JBA RCHIP 1 1630KOHMJ1608 R212 HRFS512JBA RCHIP 1 16 5 1KOHMJ1608 R213 HRFS473JBA RCHIP 1 16 47KOHMJ1608 R217 HRFS103JBA RCHIP 1 16 10KOHMJ1608 R221 HRFS123JBA RCHIP 1 16 12KOHMJ1608 R223 HRFS103JBA RCHIP 1 16 10KOHMJ160...

Page 48: ...8 PAL R931 HRFS332JBA RCHIP 1 16 3 3KOHMJ1608 PAL R934 HRFS225JBA RCHIP 1 162 2MOHMJ1608 PAL LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R939 HRFS103JBA RCHIP 1 16 10KOHMJ1608 R940 HRFS471JBA RCHIP 1 16 470OHMJ1608 R941 HRFS471JBA RCHIP 1 16 470OHMJ1608 R952 HRFS103JBA RCHIP 1 16 10KOHMJ1608 MONO R953 HRFS102JBA RCHIP 1 16 1KOHMJ1608 MONO R957 HRFS203JBA RCHIP 1 16 20KOHMJ1608 MONO R958 HRFS203JB...

Page 49: ...10MF5X7 C227 CEXF1C470A CELECTRO 16VRSM47MF 5X7 TP C250 CEXF1C100A CELECTRO 16VRSM10MF5X7 LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK C261 CEXF1C100A CELECTRO 16VRSM10MF5X7 HI FI C262 CEXF1C100A CELECTRO 16VRSM10MF5X7 HI FI C267 CEXF1C100A CELECTRO 16VRSM10MF5X7 HI FI C269 CEXF1C470A CELECTRO 16VRSM47MF 5X7 TP HI FI C270 CEXF1C100A CELECTRO 16VRSM10MF5X7 HI FI C271 CEXF1H229A CELECTRO 50VRSM2 2MF...

Page 50: ... HI FI L122 5CPX101J2T COILPEAKING 100UH BRN BRN HI FI L123 5CPX100J2T COILPEAKING 10UH BRN BLK HI FI L124 5CPX101J2T COILPEAKING 100UH BRN BRN HI FI L154 5CPX561J COILPEAKING 560UH5MMJRADIAL LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK L201 5CPX680J2T COILPEAKING 68UH BLU BLK L202 5CPX680J2T COILPEAKING 68UH BLU BLK L250 5CPX101J2T COILPEAKING 100UH BRN BRN HI FI L251 5CPX101J2T COILPEAKING 100UH...

Page 51: ...DIODE 1N4148AUTO52MM D179 DZN4148 DIODE 1N4148AUTO52MM D301 DZN4148 DIODE 1N4148AUTO52MM D302 DZN4004 DIODE 1N4004 AUTO LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK D601 DZN4004 DIODE 1N4004 AUTO D602 DZN4148 DIODE 1N4148AUTO52MM D603 DZN4004 DIODE 1N4004 AUTO D604 DZN4148 DIODE 1N4148AUTO52MM D608 DZN4004 DIODE 1N4004 AUTO D609 DZN4148 DIODE 1N4148AUTO52MM D610 DZN4148 DIODE 1N4148AUTO52MM D611 D...

Page 52: ...254 RD AZ201J RCARBONFILM 1 6200OHMJ HI FI R258 RD AZ680J RCARBONFILM 1 668OHMJ R261 RD AZ680J RCARBONFILM 1 668OHMJ HI FI LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R262 RD AZ680J RCARBONFILM 1 668OHMJ HI FI R270 RD AZ470J RCARBONFILM 1 647OHMJ HI FI R271 RD AZ183J RCARBONFILM 1 618KOHMJ R303 RD AZ102J RCARBONFILM 1 61KOHMJ SECAM R305 RD AZ434J RCARBONFILM 1 6430KOHMJ R306 RD AZ474J RCARBONFILM...

Page 53: ...65GY WIRECOPPER AWG221 0 65TINCOATING JP009 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP011 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP012 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP013 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP014 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP015 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP016 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP017 858010...

Page 54: ...65TINCOATING JP130 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP131 85801065GY WIRECOPPER AWG221 0 65TINCOATING LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK JP132 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP133 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP134 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP135 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP136 85801065GY WIRECOPPER AWG221 0 65TIN...

Page 55: ...COPPER AWG221 0 65TINCOATING JP262 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP263 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP265 85801065GY WIRECOPPER AWG221 0 65TINCOATING LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK JP266 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP267 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP268 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP269 85801065GY WIRECOPPE...

Page 56: ... JP726 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP727 85801065GY WIRECOPPER AWG221 0 65TINCOATING L701 5CPZ229K02 COILPEAKING 2 2UHK AXIAL 3 5MM L702 5CPZ229K02 COILPEAKING 2 2UHK AXIAL 3 5MM LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R701 RD AZ301J RCARBONFILM 1 6300OHMJ R702 RD AZ301J RCARBONFILM 1 6300OHMJ R703 RD AZ513J RCARBONFILM 1 651KOHMJ R704 RD AZ750J RCARBONFILM 1 675OHMJ R705 RD 2...

Page 57: ...CR REMARK JP811 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP812 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP813 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP814 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP815 85801065GY WIRECOPPER AWG221 0 65TINCOATING JP816 85801065GY WIRECOPPER AWG221 0 65TINCOATING L803 5PB13857 COILBEAD BI3857 AXIAL L826 5PB13857 COILBEAD BI3857 AXIAL R801 RC 2Z565KP RC...

Page 58: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail cwhan web dwe co kr TEL 82 2 360 7798 FAX 82 2 360 7877 DAEWOO ELECTRONICS CO LTD ...

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