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Daewoo DV-K841DY Service Manual
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Daewoo DV-K841DY Service Manual

Daewoo DV-K841DY Service Manual

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S/M No. : VK811PSEF0
Service Manual
Video Cassette Recorder
Model: DV-K841DY (VQ837)
A
F2GHA0
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
Jan. 2000

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Summary of Contents for Daewoo DV-K841DY

  • Page 1 S/M No. : VK811PSEF0 Service Manual Video Cassette Recorder Model: DV-K841DY (VQ837) F2GHA0 DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Jan. 2000...

  • Page 2: Electrical Adjustment

    ELECTRICAL ADJUSTMENT 1. PLAYBACK PHASE ADJUSTMENT TEST TEST INPUT ITEM MODE CHECK POINT POINT EQUIPMENT TAPE SIGNAL 6.5H PIN 4 & PIN 5 PLAY [REC] BUTTON OSCILLOSCOPE DP-2 NO SIGNAL ADJUSTMENT OF P504 ADJUSTMENT PARTS MEASURING POINT PCB : MAIN - TOP VIEW OSCILLOSCOPE BLOC PRE-...

  • Page 3: Specifications

    SPECIFICATIONS GENERAL Power Requirement AC 230V, 50Hz Power Consumption Max. 19W (in REC mode) Temperature 5×C ~ 35×C (Operating) -20×C ~ 60×C Operating position Horizontal only Dimensions (W x H x D) 360 x 90 x 288 (mm) Weight Approx. 3.85 Kg Format VHS standard Tape Width...

  • Page 4: Voltage Chart

    VOLTAGE CHART SECAM.L IC PDC/VPS IC EEPROM (IC361, TA1238N) (IC151, LC74793) (IC503, ATM24C16) PIN NO. PIN NO. PIN NO. 2.48 2.49 2.72 2.64 2.68 2.97 2.96 2.68 2.72 4.12 5.05 5.06 4.68 4.69 4.75 4.74 4.98 5.12 5.24 5.29 0.56 0.56 4.74 MOTOR DRIVE IC...
  • Page 5 VOLTAGE CHART A/V ICHIP IC (IC301, LA71594M) PIN NO. PIN NO. PIN NO. PIN NO. 0.05 A/V SW IC (IC601, LA7148M) PIN NO. PIN NO. PIN NO. PIN NO. 5.89 5.89 5.47 5.47 2.14 2.06 0.09 0.09 0.37 0.37 2.02 1.87 5.25 5.25...
  • Page 6 VOLTAGE CHART HI-FI IC (IC251, TDA9605H) PIN NO. PIN NO. PIN NO. PIN NO. 0.03 3.85 3.81 9.42 9.36 3.81 3.81 3.83 3.83 3.86 3.77 4.21 0.53 3.81 3.81 3.86 3.85 0.53 3.33 3.31 0.74 4.18 0.53 4.56 4.56 0.17 3.81 3.81 4.55...
  • Page 7 VOLTAGE CHART PIN NO. PIN NO. PIN NO. PIN NO. 1.66 1.69 1.69 2.32 2.35 2.26 2.27 TMI (RF101, LGTMI-SLQ1-S) PIN NO. PIN NO. PIN NO. PIN NO. 4.83 31.9 31.9 1.08 1.91 0.23 0.03 2.43 4.85 31.9 31.9 2.01 0.01 2.69 2.74...

  • Page 8: Circuit Diagram

    CIRCUIT DIAGRAM 1. POWER CIRCUIT DIAGRAM (230V ONLY)
  • Page 9 2. SYSCON CIRCUIT DIAGRAM...
  • Page 10 3. A/V CIRCUIT DIAGRAM (PAL)
  • Page 11 CIRCUIT DIAGRAM 5. PIF CIRCUIT DIAGRAM...
  • Page 12 CIRCUIT DIAGRAM 6. HIFI & SW CIRCUIT DIAGRAM...
  • Page 13 CIRCUIT DIAGRAM 7. SW CIRCUIT DIAGRAM...
  • Page 14 DISASSEMBLY 1. PACKING ASS’ Y...
  • Page 15 DISASSEMBLY DV-K841D (VQ837)

  • Page 16: Instrument Disassembly

    DISASSEMBLY 3. INSTRUMENT DISASSEMBLY 3-1. TOP COVER REMOVAL ( FIG.1 ) 1) Remove five (5) screws holding the top cover. 2) Carefully lift the back of the top cover and slide to the rear to remove.
  • Page 17 DISASSEMBLY 3-2. FRONT PANEL REMOVAL ( FIG.2 ) 1) Remove the top cover. 2) Release seven (7) tabs holding the front panel. 3) Remove the front panel.
  • Page 18 DISASSEMBLY 3-3. BOTTOM COVER REMOVAL ( FIG.3 ) 1) Remove the top cover and front panel. 2) Remove three (3) screws. 3) Release four (4) tabs and lift out the bottom cover.
  • Page 19 DISASSEMBLY 3-4. F/L DOOR REMOVAL ( FIG.4 ) ° 1) Open the F/L door 90 2) Remove the F/L door in the direction of arrow.
  • Page 20 DISASSEMBLY 3-5. COVER PRE-AMP / DECK AS REMOVAL ( FIG.5 ) 1) Remove five (5) screws. 2) Disconnect the connector and FPC. 3) Pull out the DECK AS and COVER PRE-AMP in the direction of arrow.
  • Page 21 DISASSEMBLY 3-6. PCB MAIN AS REMOVAL ( FIG.6 ) 1) Remove two (2) screws. 2) Release three (3) tabs and lift out the main PCB in the direction of arrow.

  • Page 22: Electrical Parts List

    ELECTRICAL PARTS LIST is a recommendable part for essential stock. "* " 1. PCB MAIN AS LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. B1910 97S8103600 L/C MOTOR MDH2B70 PVMCASS097 CHASSIS MAIN AS DV-K821SY-AQ B1940 5SSF1DKM10 SW CAM MMS00320ZMBO A001 97P0610600 CHASSIS MAIN HI-PS(HB)
  • Page 23 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. D824 D31DQ06--F DIODE SCHOTTKY 31DQ06-FC5 C058 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012 * H501 1GP1U291U- IC UNIT R/RECEIVER GP1U291U(38KHZ) C153 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C157 HCBK563KCA C CHIP CERA...
  • Page 24 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. C349 HCLK750JCA C CHIP CERA 50V SL 75PF J 2012 C612 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C350 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 C613 HCBK103KCA C CHIP CERA...
  • Page 25 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. Q518 T2SC2412KB TR CHIP 2SC2412K-T146-BR R008 HRFT163JCA R CHIP 1/10 16K OHM J 2012 Q520 T2SC2412KB TR CHIP 2SC2412K-T146-BR R012 HRFT150JCA R CHIP 1/10 15 OHM J 2012 RJ01 HRF8000-EA R CHIP 1/8 0 OHM 3216 R152 HRFT103JCA...
  • Page 26 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. R313 HRFT152JCA R CHIP 1/10 1.5K OHM J 2012 R563 HRFT273JCA R CHIP 1/10 27K OHM J 2012 R316 HRFT563JCA R CHIP 1/10 56K OHM J 2012 R565 HRFT201JCA R CHIP 1/10 200 OHM J 2012 R318...
  • Page 27 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. C265 CEXF1C100A C ELECTRO 16V RSM 10MF 4X7 C609 CEXE1H109F C ELECTRO 50V RMB 1MF 4*7 C270 CEXF1C100A C ELECTRO 16V RSM 10MF 4X7 C610 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP C272 CEXF1C470A C ELECTRO...
  • Page 28 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. Q204 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) C012 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M Q205 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) C054 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M Q206 TZTA1266Y- KTA1266Y- (AUTO)(1015Y) C060 CCZF1H104Z C CERA...
  • Page 29 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. D526 DZN4003--- DIODE IN4003(DAEBO) L602 5CPZ229K02 COIL PEAKING 2.2UH K(AXIAL 3.5MM) D527 DZN4003--- DIODE IN4003(DAEBO) L604 5CPZ229K02 COIL PEAKING 2.2UH K(AXIAL 3.5MM) D531 DZN4148--- DIODE 1N4148 AUTO 52MM L605 5CPZ229K02 COIL PEAKING 2.2UH K(AXIAL 3.5MM)
  • Page 30 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. LOC. PART-CODE PART-NAME PART-DESC. R315 RD-AZ152J- R CARBON FILM 1/6 1.5K OHM J R533 RD-AZ270J- R CARBON FILM 1/6 27 OHM J R317 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R534 RD-AZ182J- R CARBON FILM 1/6 1.8K OHM J R321...
  • Page 31 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. R608 RD-AZ512J- R CARBON FILM 1/6 5.1K OHM J R609 RD-AZ273J- R CARBON FILM 1/6 27K OHM J R610 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R614 RD-AZ750J- R CARBON FILM 1/6 75 OHM J R615 RD-AZ750J- R CARBON FILM...
  • Page 32 ELECTRICAL PARTS LIST 2-9. PANEL OPTION NORMAL A PANEL LOC. PART-CODE PART-NAME PART-DESC. PART-CODE PART-NAME PART-DESC. P505 97P6269100 CONN WAFER 00-8283-0712-00000 RJ88 HRFT000-CA R CHIP 1/10 0 OHM 2012 SW506 5S50101Z97 SW TACT SKHV10914B 9.5M AUTO SW507 5S50101Z97 SW TACT SKHV10914B 9.5M AUTO SW508 5S50101Z97...
  • Page 33 ELECTRICAL PARTS LIST 1.HI-FI 1PERI PHONE LOC. PART-CODE PART-NAME PART-DESC. PART-CODE PART-NAME PART-DESC. B001 97P0720200 BOARD ANT HI-PS(HB) 97P0720500 BOARD ANT HI-PS(HB) JK602 97P6313400 JACK SCART DSAM-9622 JK603 97P6313700 JACK PIN DPAM-9639 Q601 TZSR2001-- KSR2001 (AUTO) Q602 TZRC104M-- KRC104M AUTO Q603 TZRC104M-- KRC104M AUTO...
  • Page 34 ELECTRICAL PARTS LIST 2-10. POWER COMP OPTION 30 MIN. 1 MIN. LOC. PART-CODE PART-NAME PART-DESC. PART-CODE PART-NAME PART-DESC. C503 CEXF1A221V C ELECTRO 10V RSS 220MF 6.3X11 C508 CEXF1A101A C ELECTRO 10V RSM 100MF 6.3X7 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP C519 HCBK103KCA C CHIP CERA...

  • Page 35: Μ-Com Port Description

    µ-COM PORT DESCRIPTION NAME PORT ASSIGNMENT ACTIVE THIS PORT IS USUALLY OPEN BUT CAP I LIM P110/AN8 OUTPUTS THE CAPSTAN STOP STATE DECK(CAPSTAN) OF FRAME ADVANCE SHUTTLE DATA1 P77/AN7 SHUTTLE DATA INPUT SHUTTLE ASS’ Y WHEN POWER IS DISCONNECTED THIS PORT DETECTS POWER FAILURE AND PWR FAIL/ THEN GOES INTO POWER...
  • Page 36 µ-COM PORT DESCRIPTION NAME PORT ASSIGNMENT ACTIVE SEG 2 P55/RTP25 SEGMENT 2 PULSE LED DISPLAY SEG 3 P54/RTP24 SEGMENT 3 PULSE LED DISPLAY SEG 4 P53/RTP23 SEGMENT 4 PULSE LED DISPLAY SEG 5 P52/RTP22 SEGMENT 5 PULSE LED DISPLAY SEG 6 P51/RTP21 SEGMENT 6 PULSE...
  • Page 37 µ-COM PORT DESCRIPTION NAME PORT ASSIGNMENT ACTIVE EDS IN OSD EDS VIDEO INPUT C SYNC COMPOSITE SYNC DATA INPUT PULSE VIDEO EEPROM, PDC, NICAM, PIF, SW, HiFi II C DATA P04/OUT1 SERIAL DATA II C CLK P03/OUT2 EEPROM, PDC, NICAM, PIF, SW, HiFi CLK SERIAL CAPSTAN MOTOR FORWARD(L)/ CAP F/R...
  • Page 38 µ-COM PORT DESCRIPTION NAME PORT ASSIGNMENT ACTIVE P81/DRFGin DRUM FG INPUT PULSE DECK(DRUM) DRPGin DRUM PG INPUT PULSE DECK(DRUM) AMP Vrefout AMP Vrefout AMP Vrefout AMP Vrefin AMP Vrefin AMP Vrefin P80/C CTL- CTL- CTL - CTL+ CTL+ CTL + AMP C AMP C CTL AMP...

  • Page 39: Service Mode

    SERVICE MODE 1. SERVICE MODE ITEM REMARKS 1. Press the [MENU] button to go to [MAIN MENU] screen and press the number [484] in sequence then MAIN MENU go to [SERVICE MODE] screen. Timer Program 2. ENGLISH only for this special menu. Timer Review VCR Setup 3.
  • Page 40 SERVICE MODE 2. SVC MODE FOR REPAIR 2 - 1. ERROR CHECK MODE ITEM REMARKS 1. Press the number 1 button , then OSD 1 is displayed in the initial SVC mode screen. SVC MODE FOR REPAIR DECK JIG CONNECTION MODE (OFF) EE MODE WITHOUT DECK MODE(OFF)
  • Page 41 SERVICE MODE 2 - 2. DECK JIG CONNECTION MODE ITEM REMARKS 1. Press the number 1 button, OFF ¡ ê ON is toggled in the SVC MODE FOR REPAIR screen. * The initial state is set to OFF mode. 2 - 3. EE MODE WITHOUT DECK ITEM REMARKS 1.
  • Page 42 SERVICE MODE 4. CHANGE OF EEPROM DATA ITEM REMARKS * [CHANGE OF EEPROM DATA] is used to change the VIDEO/AUDIOcharacteristic data. 0 0 0 1 1 1 0 1 1. Press number [3] button to activate the mode. 1 1 1 1 1 1 1 0 1 0 0 0 0 0 1 0 2.
  • Page 43 SERVICE MODE 7. THE METHOD TO INITIALIZE THE VIDEO DATA 1. When [484] is sequentially pressed in MENU mode, the SERVICE mode is activated. 2. Choose “ CHANGE OF VIDEO DATA” by pressing [3]. 3. The input video signal should be PAL or null signal and the speed should be SP. 4.

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