Daewoo DV-K592NZ-QB/M Service Manual Download

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Service Manual

Video Cassette Recorder

All models (K30 -Mecha)
SYSTEM : NTSC

Model : DV-K892NZ-QB/M
DV-K592NZ-QB/M

DAEWOO ELECTRONICS CO., LTD.

http : //svc.dwe.co.kr

S/M No. : VK592NTEF0

Summary of Contents for DV-K592NZ-QB/M

Page 1: ...Service Manual Video Cassette Recorder All models K30 Mecha SYSTEM NTSC Model DV K892NZ QB M DV K592NZ QB M DAEWOO ELECTRONICS CO LTD http svc dwe co kr S M No VK592NTEF0 ...

Page 2: ...IT 4 HEAD MODEL 21 WAVEFORMS 24 CIRCUIT DIAGRAM 28 INTERCONNECT WIRING DIAGRAM 28 POWER SUPPLY SCHEMATIC DIAGRAM 29 SYSCON CIRCUIT DIAGRAM 30 VIDEO AUDIO SCHEMATIC DIAGRAM 4 HEAD 31 VIDEO AUDIO SCHEMATIC DIAGRAM Hi Fi 32 PIF SCHEMATIC DIAGRAM 4 HEAD 33 HI FI SCHEMATIC DIAGRAM 34 PIF MPX SCHEMATIC DIAGRAM Hi Fi 35 PCB CIRCUIT BOARD 36 INSTRUMENT DISASSEMBLY 37 ELECTRICAL PARTS LIST 43 ...

Page 3: ... scan Luma FM recording Chroma converted subcarrier phase shifted recording Two audio record playback heads Rotary helical scan 2 channels FM recording 4 head Four video record playback heads Rotary helical scan Luma FM recording Chroma converted subcarrier phase shifted recording Video Signal EIA standard NTSC color Antenna 75 ohm input impedance Video Signal Level 1Vp p 140 IRE standard Audio In...

Page 4: ...e scope on channel 1 3 Connect channel 2 scope probe 1V div to the Video Out Jack 4 Set the scope to slope and adjust the PG Shifter control R595 so that the trailing edge of the SW 30Hz pulse is placed 6 5H 1H horizontal lines before the start of vertical sync pulse PG Shifter Adjustment Stereo Separation Adjustment Hi Fi MODEL ONLY Test Points Terminal of C156 Main Adjust R191 Main 1 Connect sco...

Page 5: ...oltage applied to the terminal of C806 Is output voltage of secondary correct Check secondary rectifier Diode D809 D810 D812 D819 Is sw pulse of base T801 Correct OK Change AC CORD Check Ic601 Check IC803 D805 D806 D807 D808 YES YES NO YES NO NO YES NO NO Check F801 L801 D801 C806 YES NO OUTPUT Voltage 1 Change secondary rectifier Diode D809 D810 D812 D819 ...

Page 6: ...X601 pin of IC601 Is 5V applied to pin of IC601 Is 4V applied to collector of Q711 Q712 Q713 and Q714 Check IC602 Check D813 Check IC601 Check R636 C616 Check Q711 Q712 Q713 and Q714 YES YES YES YES NO NO NO A NO NO LED ARRAY does not operate Check the pulse signal of pin of IC601 and LD701 YES 37 34 4 20 33 ...

Page 7: ...at pin of IC601 Do pin and of IC601 oscillate Check IC601 Check C820 Check X601 R603 C604 and C605 NO YES YES YES YES NO NO NO B C Check the IC602 RESET circuit Is 0V applied to pin of Ic601 YES NO Check the R636 C616 LED ARRAY is lit but key does not operate 1 hour back up timer does not operate Is 5V applied to 34 4 35 37 11 12 36 pin of IC601 ...

Page 8: ... output signal pin of IC301 YES YES NO NO YES E Is 5V supplied to pin of Ic601 NO YES Is 5V applied to pin of Ic601 YES Check X601 Is 4V applied to the collector Is 5V applied to of Q711 Q712 Q713 Q714 pin of Ic601 Check D813 YES YES Check pin of IC601 and LD701 YES NO Check IC602 NO Check IC601 NO NO Check L806 Check R636 C616 When change the channel broadcast signal is not received LED ARRAY doe...

Page 9: ...o pin of IC601 YES NO NO Check IC601 NO Noise appears although change cassette tape CTL HEAD height is normal and there is not dust YES Check CTL input in circuit R501 R502 R503 C501 CTL AMP VREF IC601 pin and AMP Vcc IC601 pin YES Check and re adjust the Path of Deck NO Adjust the HEAD height and remove dust F Playback picture is not good 97 98 91 92 ...

Page 10: ...Enve waveform supplied to at pin of PT01 YES NO Check VIDEO circuit Check connector Head Amp and Clean heads Is Reel pulse applied to pin and of IC601 YES NO YES NO Check REEL sensor part Is D FG applied to pin of Ic601 Check connector P502 and D FG circuit R504 C509 G H Is C FG applied to pin of Ic601 NO Check connector P501 and C FG circuit R510 C511 YES Check IC601 Playback picture is not good ...

Page 11: ...tor J YES YES Check power circuit NO Is 12V supplied to P501 pin YES NO Is the voltage of pin P501 3 2V YES Check R513 R514 NO Is the voltage of P501 pin 2 5V YES Check IC601 and C FG NO Is C PWM pin of IC601 correct YES NO Is the voltage of pin P501 2 3V YES Check connector P501 and capstan motor Check R511 R512 C512 Check circuit of R515 R516 R517 C513 Drum Motor does not rotate Capstan Motor do...

Page 12: ...s Err 82 84 86 66 Is 12V applied to pin of IC604 Check power circuit YES NO L Check motor drive circuit Check IC601 Is 5V applied to pin of IC601 when CST IN YES NO Is 5V applied to pin of PJ601 when CST IN YES NO Check connector PJ601 pin and and loading motor in DECK Mechanism Cassette loading inoperative 81 7 1 1 2 ...

Page 13: ...rom pin of Ic301 YES NO Check IIC CLK DATA Is 5V suppiled to pin and of Ic601 Check PCB pattern Is signal input into pin of Ic601 YES NO Is signal output from pin of Ic601 YES NO YES Check power circuit RF out YES Line out Check power circuit NO Check PIF circuit and LINE IN JACK EE MODE Picture NG Check IC601 YES 34 36 38 16 58 29 50 52 53 98 99 ...

Page 14: ...separated C signal output from pin of IC301 input into pin of IC301 output from pin of IC301 YES Is composite video signal output from pin of IC301 YES Check OSD circuit NO NO YES NO YES NO NO NO NO NO NO NO NO NO YES YES Is 5V supplied at pin of IC301 Is 5V supplied to pin of IC301 Check IIC DATA CLK Check power circuit Is SW pulse input into pin of IC301 Check pin of IC601 Check Power circuit Ch...

Page 15: ...t IC401 pin Is REC H signal supplied IC301 pin Is SW pulse input into IC301 pin Is REC signal output from IC301 pin SP mode pin EP mode pin Check video head and connector Check EE mode Is signal input into IC301 pin Change IC301 Check IC601 pin Check REC H Check power circuit Record video signal NG 12 71 87 30 11 84 90 90 84 8 34 36 38 ...

Page 16: ...15 TROUBLESHOOTING GUIDES YES D Does X602 crystal 14 318MHz oscillate YES NO Is 5V supplied at IC601 pin YES NO Check power circuit OSD Character Incorrect Check X602 Change IC601 53 98 99 ...

Page 17: ...NO A Is 5V supplied to pin of IC251 and pin of IC301 Check INPUT JACK Is signal input pin of IC251 in line mode YES NO Is 0V supplied to pin of IC251 YES NO YES NO Check SYSCON circuit Change IC251 Is there output at pin of IC251 NO Check OUTPUT JACK YES No sound in the E E mode 60 14 20 30 36 75 53 61 8 56 58 ...

Page 18: ...evel of IC251 pin more than 200mVp p Is A SW PULSE input into pin of IC251 Is pin of IC251 over 3V Check IC601 NO Check the PRE AMP circuit NO Check IC601 Change IC251 YES YES YES No Hi Fi sound in playback mode of Hi Fi recorded tape 18 19 35 17 ...

Page 19: ... of Q205 5V NO NO Check IC601 Is there output at pin of IC251 Clean HEAD Is there FM osc wave at pin of P401 NO Check IC251 NO Change Drum YES YES YES YES No Hi Fi sound in the playback mode after Hi Fi recording Check the following procedure in RECORD mode Check IC101 6 44 26 2 ...

Page 20: ...pin of IC301 NO Is 9V supplied pin of IC251 NO Check Power circuit Is there Audio signal pin of IC301 Is pin of IC301 0V NO Check A C head Check PJ201 and A C head NO NO Check Power circuit YES YES YES YES Check IC301 and IC251 No sound in the linear playback mode 56 58 60 14 30 36 20 75 100 10 ...

Page 21: ...1 Is the voltage above 5 8V at pin of T201 Is the Emitter of Q205 5V YES NO Check power circuit NO YES Check A C HEAD and connector pin of PJ201 Check INPUT JACK NO Check power circuit YES YES YES Check Q202 Collect 5 8V Base 0 7 3 0V YES NO Check Q202 YES Check T201 No linear sound in the playback mode after linear recording Check the following procedure in RECORD mode 2 7 52 76 61 3 4 8 ...

Page 22: ...to pin of IC301 Check power circuit YES NO A Check INPUT JACK Is signal input pin of IC301 in line mode YES NO Is 0V supplied to pin of IC301 YES NO YES Check SYSCON circuit Change IC301 Is there output at pin of IC301 NO Check OUTPUT JACK No sound in the E E mode 76 75 10 96 ...

Page 23: ...at pin of IC301 Check R214 R265 C279 Is 5V applied to pin of IC301 Is IIC CLK applied to pin of IC301 Is the collector of Q203 0V Check Pin of PJ201 NO NO Check power circuit NO Check IC601 NO Check Q203 Q204 Q205 YES YES YES YES YES No sound in the playback mode 96 75 23 24 3 4 ...

Page 24: ...YES NO Check Q202 YES Is there output at pin of IC301 Does T201 oscillate YES YES Check A C HEAD and connector pin of PJ201 Check Q202 Collect 5 8V Base 0 7 3 0V NO Check T201 Check INPUT JACK YES Is the collector of Q205 5V YES Check power circuit NO No sound in the playback mode after recording Check the following procedure in RECORD mode NO Check IC601 76 10 7 3 4 8 2 ...

Page 25: ...1 21 500mVp p 200mV 10u sec cm PLAY IC301 41 150mVp p 50mV 10u sec cm PLAY IC301 28 5 2Vp p 2V 5msec cm Picture search 2 5 7 9 IC301 12 300mV 100mV 10u sec cm REC 3 IC301 20 500mVp p 200mV 10u sec cm REC 6 IC301 43 100mVp p 20mV 10u sec cm REC 8 IC301 29 2 1Vp p 1V 10u sec cm REC 10 IC301 17 250mVp p 100mV 5ms cm PLAY 4 IC301 20 500mVp p 200mV 10u sec cm PLAY 6 IC301 43 100mVp p 20mV 10u sec cm PL...

Page 26: ...C PLAY 12 IC301 61 300mVp p 200mV 10u sec cm REC PLAY 13 IC301 59 300mVp p 200mV 10u sec cm REC PLAY 14 IC301 76 100mVp p 20mV 0 5msec cm REC IC301 100 120mVp p 50mV 0 5msec cm PLAY 16 20 IC301 96 1 5Vp p 0 5V 0 5msec cm REC T201 5 65Vp p 10V 20u sec cm REC 17 21 IC301 98 0 45Vp p 0 2V 0 5msec cm REC 18 T201 6 75Vp p 10V 20u sec cm REC 22 IC301 7 2 3Vp p 0 5V 0 5msec cm REC 19 ...

Page 27: ...IC601 38 4 8Vp p 1V 0 05u sec cm REC PLAY 23 27 31 IC601 77 5 5Vp p 2V 0 2u sec cm REC PLAY IC601 89 1 3Vp p 0 5V 0 5m sec cm REC PLAY 24 28 IC601 76 5Vp p 2V 0 2u sec cm REC PLAY 25 IC601 90 2Vp p 0 5V 10msec cm REC PLAY IC601 87 2 5Vp p 1V 0 2msec cm REC PLAY 29 IC601 94 3 8Vp p 2V 5msec cm REC 26 30 ...

Page 28: ...IC251 61 0 8Vp p 0 2V 0 5msec EE REC PLAY IC251 39 0 75Vp p 0 2V 0 5msec EE REC 32 36 IC251 12 0 75Vp p 0 2V 0 5msec EE REC IC251 57 0 9Vp p 0 2V 0 5msec EE REC 33 37 IC251 26 0 3Vp p 0 1V 1msec REC 34 IC251 19 600mVp p 200mV 2msec PLAY 35 ...

Page 29: ...28 CIRCUIT DIAGRAM 1 INTERCONNECT WIRING DIAGRAM ...

Page 30: ...29 CIRCUIT DIAGRAM 2 POWER SUPPLY SCHEMATIC DIAGRAM ...

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

Page 32: ...31 CIRCUIT DIAGRAM 4 VIDEO AUDIO SCHEMATIC DIAGRAM 4 HEAD ...

Page 33: ...32 CIRCUIT DIAGRAM 5 VIDEO AUDIO SCHEMATIC DIAGRAM HI FI ...

Page 34: ...33 CIRCUIT DIAGRAM 6 PIF SCHEMATIC DIAGRAM 4 HEAD 68 16 4 ...

Page 35: ...34 CIRCUIT DIAGRAM 7 HI FI SCHEMATIC DIAGRAM ...

Page 36: ...35 CIRCUIT DIAGRAM 8 PIF MPX SCHEMATIC DIAGRAM HI FI 68 16 ...

Page 37: ...36 PCB CIRCUIT BOARD MAIN PCB ...

Page 38: ... presented When reassembling use the reverse procedure Make sure that all leads wiring are routed correctly when reassembling 1 Top Cover Removal Fig 1 1 Remove three 3 screws Holding the top cover 2 Carefully lift the back of top cover and slide it to the rear to remove it ...

Page 39: ...2 Front Panel Removal Fig 2 1 Continued from Fig 1 2 Remove two 2 screws securing front panel F L bracket 3 Remove the F L bracket 4 Release seven 7 tabs holding the front panel Release bottom tabs first 5 Remove the front panel ...

Page 40: ...39 INSTRUMENT DISASSEMBLY 3 Bottom Cover Removal Fig 3 1 Remove the top cover and the front panel 2 Remove two 2 screws 3 Lift out the bottom cover in the direction of the arrow ...

Page 41: ...40 INSTRUMENT DISASSEMBLY 4 F L Door Removal Fig 4 1 Open the F L door 90 degrees 2 Remove the F L door in the direction of the arrow ...

Page 42: ...k Assembly Removal Fig 5 1 Remove the top cover the front panel and the bottom cover 2 Disconnect the FPC A 3 Disconnect three 3 connectors B C D 4 Remove four 4 screws E F 5 Pull out the Deck Assembly in the direction of the arrow 5 ...

Page 43: ...RUMENT DISASSEMBLY 6 Main PCB Assembly Removal Fig 6 1 Remove the top cover the front panel the bottom cover and the deck assembly 2 Release two 2 tabs A and lift out the Main PCB in the direction of the arrow ...

Page 44: ...220V C ELECTRO 25V RSS 22MF 5X11 C203 CMXM2A272J C MYLAR 100V 2700PF J TP C204 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 C205 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 MONO C206 CEXF1E330V C ELECTRO 25V RSS 33MF 5X11 TP C207 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 MONO C208 CEXF1E220A C ELECTRO 25V RSM 22MF 6 3X7 C209 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 C210 CEXF1C470A C ELECTRO 1...

Page 45: ...334 HCFK104ZCA C CHIP CERA 50V Y5V 0 1MF Z 2012 NO PART CORD PART NAME PART DISC REMARK C335 HCFK223ZCA C CHIP CERA 50V Y5V 0 022MF Z 2012 C336 CEXF1C101A C ELECTRO 16V RSM 100MF 6 3X7 TP C337 CBZP1C103M C CERA SEMI 16V Y5S 0 01MF M C338 CEXF1H109A C ELECTRO 50V RSM 1MF 4X7 TP C339 HCFK103ZCA C CHIP CERA 50V Y5V 0 01MF Z 2012 C340 CEXF1H109A C ELECTRO 50V RSM 1MF 4X7 TP C342 HCFK223ZCA C CHIP CERA...

Page 46: ...0 1F TAPING C822 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C823 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C824 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP NO PART CORD PART NAME PART DISC REMARK C825 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C826 CEXF1H470V C ELECTRO 50V RSS 47MF 6 3X11 TP C827 CEXF1E470V C ELECTRO 25V RSS 47MF 5X11 TP C828 CEXF1A471V C ELECTRO 10V RSS 470MF 8X11 5 C829 CEXF1A471V C...

Page 47: ...BLU BLK L202 5CPX680J2T COIL PEAKING 68UH BLU BLK NO PART CORD PART NAME PART DISC REMARK L252 5CPX680J2T COIL PEAKING 68UH BLU BLK Hi Fi L302 5CPZ560K02 COIL PEAKING 56UH K AXIAL 3 5MM L304 5CPX100J2T COIL PEAKING 10UH BRN BLK L305 5CPX100J2T COIL PEAKING 10UH BRN BLK L306 5CPX100J2T COIL PEAKING 10UH BRN BLK L308 5CPX100J2T COIL PEAKING 10UH BRN BLK L501 5PB13857 COIL BEAD BI3857 AXIAL L502 5PB1...

Page 48: ...MARK R208 85801060TA WIRE COPPER 0 6X52MM TAPING Hi Fi RD AZ681J R CARBON FILM 1 6 680 OHM J MONO R209 HRFT273JCA R CHIP 1 10 27K OHM J 2012 MONO R210 RD AZ224J R CARBON FILM 1 6 220K OHM J MONO R211 RD AZ225J R CARBON FILM 1 6 2 2M OHM J R212 RD AZ331J R CARBON FILM 1 6 330 OHM J Hi Fi RD AZ131J R CARBON FILM 1 6 130 OHM J MONO R213 RD AZ681J R CARBON FILM 1 6 680 OHM J R214 RD AZ221J R CARBON FI...

Page 49: ... RD AZ152J R CARBON FILM 1 6 1 5K OHM J R378 RD AZ155J R CARBON FILM 1 6 1 5M OHM J NO PART CORD PART NAME PART DISC REMARK R380 RD AZ101J R CARBON FILM 1 6 100 OHM J R501 HRFT332JCA R CHIP 1 10 3 3K OHM J 2012 R502 HRFT131JCA R CHIP 1 10 130 OHM J 2012 R503 HRFT131JCA R CHIP 1 10 130 OHM J 2012 R504 RD AZ102J R CARBON FILM 1 6 1K OHM J R506 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R507 RD AZ223J R ...

Page 50: ...229J R WIRE WOUND 2W 2 2 OHM J R803 HRFT103JCA R CHIP 1 10 10K OHM J 2012 NO PART CORD PART NAME PART DISC REMARK R804 HRFT689JCA R CHIP 1 10 6 8 OHM J 2012 R805 RS01F334J R M OXIDE FILM 1W 330K OHM J R807 HRFT103JCA R CHIP 1 10 10K OHM J 2012 R808 HRFT201JCA R CHIP 1 10 200 OHM J 2012 R809 RD 4Z100J R CARBON FILM 1 4 10 OHM J R810 HRFT181GCA R CHIP 1 10 180 OHM G 2012 R811 RD AZ102G R CARBON FILM...

Page 51: ...7 SW TACT SKHV10914B 9 5M AUTO NO PART CORD PART NAME PART DISC REMARK SW704 5S50101Z97 SW TACT SKHV10914B 9 5M AUTO SW705 5S50101Z97 SW TACT SKHV10914B 9 5M AUTO SW706 5S50101Z97 SW TACT SKHV10914B 9 5M AUTO SW709 5S50101Z97 SW TACT SKHV10914B 9 5M AUTO SW710 5S50101Z97 SW TACT SKHV10914B 9 5M AUTO T201 560202L692 COIL OSC DEO 006 T801 57M8282210 TRANS SMPS TSW K892N U001 97P65245MA PCB MAIN 330 ...

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