Daewoo DV-K8J5A Technical Manual
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Daewoo DV-K8J5A Technical Manual

Daewoo DV-K8J5A Technical Manual

Hi-fi/mono
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TECHNICAL MANUAL
 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://svc.dwe.co.kr).
DV-K8J5A(Hi-Fi)
DV-K5J5A(MONO)

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Summary of Contents for Daewoo DV-K8J5A

  • Page 1 TECHNICAL MANUAL DV-K8J5A(Hi-Fi) DV-K5J5A(MONO)  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://svc.dwe.co.kr).

  • Page 2: Table Of Contents

    TIMER CIRCUIT (DV-K8J5A) TIMER CIRCUIT (DV-K5J5A/K5L5A) SERVO/SYSCON SCHEMATIC DIAGRAM (DV-K8J5A) SERVO/SYSCON SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A) VIDEO & AUDIO SCHEMATIC DIAGRAM (DV-K8J5A) VIDEO & AUDIO SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A) PIF & MPX SCHEMATIC DIAGRAM (DV-K8J5A) PIF SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A) 4HD (Hi-Fi) PREAMP CIRCUIT DIAGRAM (DV-K8J5A)

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS 1. Before returning the instrument to the customer always make Measure for current from a known earth ground (metal a safety check of the entire instrument including but not limited waterpipe, conduit, etc.) to all exposed metal or conductive to the following items.

  • Page 4: Specifications

    SPECIFICATIONS Power Input: 90~260 Volts AC 50Hz Video Signal: NTSC/N-PAL Power Consumption: 14 Watts (4-head Hi-Fi) Antenna: 75 ohm input impedance 13 Watts (4-head) Video Signal Level: 1Vp-p Operating Temperature: 5 degree C to 35 degree C Audio Input Impedance: 47k ohms (41 degree F to 95 degree F) Audio Output...

  • Page 5: Test Equipment Requirements

    TEST EQUIPMENT REQUIREMENTS AC Millivolt Meter N-PAL/NTSC Video Signal Generator–Must provide 1Vp-p Sensitivity: 1.0mVAC–400VAC negative sync video across a 75 ohm load and produce standard N-PAL/NTSC 75% saturated color bars with a 100% white win- Dual-Trace Triggered Oscilloscope–with Lo–Cap (X10) dow.

  • Page 6: The Setvice Fixture

    THE SERVICE FIXTURE FIXTURE ITEM DESCRIPTION Extension Cable 1 Use for K mecha Drum Motor Connecting Cable Extension Cable 2 Use for K mecha Capstan Motor connecting Cable Extension Cable 3 Use for K mecha A/C head and L/C Motor Connecting Cable Path Adj Fixture Use for X-position adjust/Tape path alignment Special Driver...

  • Page 7: Extension Cable Connection

    EXTENSION CABLE CONNECTION...

  • Page 8: Path Fixture Connection/Test Point Identification

    NOTE: PLACING THE UNIT IN THE SERVICE MODE Service option For this chassis, the sensors (start/end/reel) are located on the MAIN circuit board, not in the DECK assembly. There is an important service option that has to be followed to repair the MAIN circuit board with the DECK assembly connected. To imitate the function of the sensors, insert the SVC Mode Diode wire (D723) on the MAIN circuit board as shown below.

  • Page 9: Instrument Disassembly

    INSTRUMENT DISASSEMBLY Perform all disassembly procedures in the order presented. When reassembling, use the renerse procedure. Make sure that all leads/wiring are routed correctly when reassembling. Top Cover Removal Bottom Cover Removal (Fig. 1) (Fig. 3) 1. Remove three screws(A) holding the top cover. 1.
  • Page 10 INSTRUMENT DISASSEMBLY (Continued) PCB Preamp Assembly Removal Deck Assembly Removal (Fig. 5) (Fig. 7) 1. Remove top cover and front panel. 1. Remove top cover, bottom cover, front panel. 2. Disconnect connectors (A,B,C). 2. Disconnect three connectors (A) (B) (C). 3.

  • Page 11: Remote Hand Unit Disassembly

    REMOTE HAND UNIT DISASSEMBLY Hand unit cover Removal (Fig. 9-1) 1. Remove the cover remocon.! 2. Remove two screw.@ 3. Release func. Knob ass'ys holding the top cover.# 4. Release twelve(12) tabs holding the top cover.$ Fig. 9-1--Hand Unit Cover Removal. Hand unit cover Removal (Fig.

  • Page 12: Electrical Adjustment

    ELECTRICAL ADJUSTMENTS (Hi-Fi MODEL) ELECTRICAL ADJUSTMENTS (4HD MODEL) PG (Pulse Generator) Shifter Adjustment (Fig. 4) PG (Pulse Generator) Shifter Adjustment (Fig. 5) PT01 PIN # PT01 PIN # Test Points: Main Test Points: Main Video Out Jack Rear Panel Video Out Jack Rear Panel Adjust: R599 (PG Shifter)

  • Page 13: Servo Waveforms

    SERVO WAVEFORMS (IC601-3) 5.6Vp-p (IC601-4) 5.6Vp-p (IC601-18) 5.6Vp-p (IC601-34) 5.6Vp-p 2V/5µsec/cm 2V/5µsec/cm 2V/5msec/cm 2V/50nsec/cm REC/PLAY REC/PLAY REC/PLAY REC/PLAY & (IC601-66) 4.8Vp-p (IC601-67) 4.8Vp-p (IC601-68) 4.8Vp-p (IC601-71) 5.2Vp-p 2V/10msec/cm 2V/0.5msec/cm 2V/0.5msec/cm 2V/5msec/cm REC/PLAY REC/PLAY REC/PLAY (IC601-71) 3Vp-p (IC601-72) 4.8Vp-p (IC601-72) 3Vp-p (IC601-73) 5Vp-p 1V/5msec/cm 2V/5msec/cm...

  • Page 14: Lumi/Chroma Waveforms

    LUMI/CHROMA WAVEFORMS (IC301-14) 440mVp-p (IC301-15) 800mVp-p (IC301-17) 1.16Vp-p (IC301-18) 340mVp-p 200mV/10µsec/cm 200mV/10µsec/cm 500mV/10µs/cm 100mV/10µsec/cm PLAY PLAY & (IC301-20) 1Vp-p (IC301-26) 510mVp-p (IC301-26) 500mVp-p (IC301-28) 1Vp-p 500mV/5ms/cm 200mV/10µsec/cm 200mV/10µsec/cm 500mV/10µsec/cm PLAY (IC301-37) 4.2Vp-p (IC301-38) 2.15Vp-p (IC301-38) 2.05Vp-p (IC301-40) 350mVp-p 2V/20µsec/cm 500mV/10µsec/cm 500mV/10µsec/cm 100mV/10µsec/cm REC/PLAY...
  • Page 15 LUMI/CHROMA WAVEFORMS (IC301-14,50) 320mVp-p (IC301-48, 50) 240mVp-p (IC301-52) 320mVp-p (IC301-52) 240mVp-p 200mV/10µsec/cm 100mV/10µsec/cm 100mV/10µs/cm 100mV/10µsec/cm PLAY (IC301-55) 480Vp-p (IC301-56) 500mVp-p (IC301-56) 500mVp-p (IC301-58) 480mVp-p 200mV/0.5ms/cm 200mV/0.5µsec/cm 200mV/0.5µsec/cm 200mV/0.5µsec/cm REC/PLAY (IC301-58) 480mVp-p (IC301-60) 480Vp-p 200mV/0.5µsec/cm 200mV/0.5µsec/cm REC/PB...

  • Page 16: Audio Waveforms

    AUDIO WAVEFORMS “ ‘ (IC301-73) 90mVp-p (IC301-77) 1.5Vp-p (IC301-79) 0.4Vp-p (IC301-1) 2Vp-p 20mV/0.2msec/cm 0.5V/0.2msec/cm 50mV/0.2msec/cm 0.5V/0.2msec/cm (IC301-10) 85mVp-p (T201-5) 60Vp-p (T201-6) 75Vp-p 20mV/0.5msec/cm 30V/20µsec/cm 40V/20µsec/cm PLAY...

  • Page 17: Hi-Fi Audio Waveforms

    Hi-Fi AUDIO WAVEFORMS (IC901-45) 360mVp-p (IC901-7) 900mVp-p (IC901-22) 1100mVp-p (IC901-25) 400mVp-p 100mV/0.5msec 200mV/0.5msec 500mV/1msec 200mV/2msec EE/REC/PLAY EE/REC PLAY (IC901-33) 900mVp-p (IC901-47) 360mVp-p 200mV/0.5msec 100mV/0.5msec EE/REC EE/REC/PLAY...

  • Page 18: Voltage Charts

    POWER VOLTAGE CHARTS MODE POWER MODE POWER REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE CN11 CAUTION: TEST POINT (Pin (1) (2) ¡Œ(4) (5) Q810 12.5 12.3 12.2 12.0...
  • Page 19 SERVO/SYSCON/TIMER µ-COM VOLTAGE CHARTS MODE µ-COM MODE µ-COM REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE 1.24 1.25 1.25 1.24 1.24 1.25 12.5 0.25...
  • Page 20 MODE CI DRIVE (IC602) MODE IC RESET (IC604) REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE 12.25 12.15 12.28 11.98 12.15 12.24 12.82 12.25 12.15 12.28 11.98 12.15 12.24...
  • Page 21 VIDEO/AUDIO IC VOLTAGE CHARTS MODE IC A/V MODE IC A/V REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE CCD & HEADAMP IC VOLTAGE CHARTS MODE IC CCD MODE IC CCD REW/...
  • Page 22 HEADAMP IC VOLTAGE CHARTS MODE IC HEADAMP (LA70020:6'CH) MODE IC HEADAMP (LA70020:6'CH) REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE 5.06 5.02 5.05 5.05 5.04 5.07 5.05 2.149 2.14...
  • Page 23 AUDIO Hi-Fi VOLTAGE CHARTS (Hi-Fi ONLY) MODE IC OSD MODE IC OSD REW/ REV/FWD PLAY REW/ REV/FWD PLAY PIN No. PIN No. STOP PLAY STOP PLAY F.FWD SEARCH PAUSE PAUSE F.FWD SEARCH PAUSE PAUSE IC901...
  • Page 24 MPX MODULE PIN VOLTAGE (Hi-Fi ONLY) MODE MODE PIN NO NAME EE. REC EE. REC REMARK PIN NO NAME EE. REC EE. REC REMARK (TUNER) (LINE) (TUNER) (LINE) MSI (SW2) STEREO:5V SAP:0V L-OUT SAP IND SAP:0V R-OUT ST IND STEREO:0V A•MUTE A.MUTE:5.3V MPX IN...

  • Page 25: Pin Name & Function Of Micom

    PIN NAME & FUNCTION OF MICOM NAME PORT IN/OUT ASSIGNMENT ACTIVE CTL TEST P80/CSTO/RTSO OUTPUT CONTROL PLUSE TEST PORT PULSE P77/PWM2 CAP PWM P76PWM1 OUTPUT CAPSTAL CONTROL PWM OUTPUT PULSE DRUM PWM P75/PWM0 OUTPUT DRUM CONTROL PWM OUTPUT PULSE SUPPLY R/P P74/INT1 INPUT SUPPLY REEL PULSE...
  • Page 26 NAME PORT IN/OUT ASSIGNMENT ACTIVE CAM B INPUT CAM DATA INPUT CAM C INPUT CAM DATA INPUT CAM D INPUT CAM DATA INPUT LM ON OUTPUT LOADING MOTOR ON PULSE LM F/R OUTPUT LOADING MOTOR FWD/RVS PULSE EJECT OUT (H) OUTPUT CASSETTE DOWN OUT HIGH...

  • Page 27: General Informations

    TECHNICAL EXPLANATION INDEX. GENERAL INFORMATIONS Operation Modes FRAME ADVANCE Play, still, slow (4 head only), frame advance (4 head only), Lets you view one frame with each press of the button when the index search, commercial scan, speed forward (reverse) picture tape is in stop-action pause.
  • Page 28 Index Search On screen Display Index search feature lets you automatically record on index mark White graphics will be displayed on a background. When VCR on the tape every time you stop and start recording. During is turned on, menu graphics are displayed on screen by pressing playback, you can locate the program you want to play be the MENU button on the remote.

  • Page 29: Parts List

    PARTS LIST Caution : In this Service 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://svc.dwe.co.kr) STANDARD PART IDENTIFICATION RESISTOR CODING 1) Fixed Resistor Coding...
  • Page 30 CAPACITOR CODING 1) Normal Tolerance Value Distance Type Voltage (Same as Fixed (Same as Fixed (Same As Resistor) Code Type Code Voltage Resistor) Fixed Resistor) Aluminum 6.3V Barrier Layer Shape Ceramic Electrolytic Characteristic Line Across Mylar Styrol Metalized Polyester Mica 100V Tantal 125V...
  • Page 31 LEADLESS (CHIP) COMPONENT IDENTIFICATION 1. Check the followings before S.M.D Troubleshooting • Cracked or Chipped Component Body • Rejection of Solder from Copper Pads or Component • Cracked or Separated Solder Joints • Foreign Matter on Copper Pads • Peeling end Terminations or Fractured Leads •...
  • Page 32 K8J5ABOM 1. PCB MAIN AS REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C001 HCQK240JCA C CHIP CERA 50V CH 24PE J 2012 C257 CEXF1C100A C ELECTRO 16V RSM 10MF 5X7 C002 HCQK240JCA C CHIP CERA 50V CH 24PE J 2012 C258 HCBK472KCA...
  • Page 33 K8J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C336 CBZP1C103M C CERA AXIAL 16V Y5S 0.01MF M C606 CBZP1C103M C CERA AXIAL 16V Y5S 0.01MF M C337 HCK473ZCA C CHIP CERA 50V Y5V 0.047MF Z 2012 C607 CBZP1C103M C CERA AXIAL...
  • Page 34 K8J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION D814 DZN4148--- DIODE 1N4148 AUTO 52MM Q301 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) D815 DZTZ33B--- DIODE ZENER MTZ-33B Q302 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) D817 DZA7160A-- DIODE ZENER MA7160-A (52MM TAPPING) Q303 TZTA1266Y- KTA1266Y-(AUTO)(1015Y)
  • Page 35 K8J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION R221 HRFT334JCA R CHIP 1/10 330K OHM J 2012 R450 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R222 HRFT103JCA R CHIP 1/10 10K OHM J 2012 R451 HRFT122JCA R CHIP...
  • Page 36 K8J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION R650 RD-AZ102J- R CARBON FILM 1/6 1K OHM J S602 97POSO1800 SENSOR REEL SG-239S R651 RD-AZ102J- R CARBON FILM 1/6 1K OHM J S603 TST5811--- TR PHOTO ST-5811(D-RANK) R655...
  • Page 37 K5J5ABOM 1. PCB MAIN AS REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C001 HCQK240JCA C CHIP CERA 50V CH 24PE J 2012 C308 CEXF1C100A C ELECTRO 16V RSM 10MF 5X7 C002 HCQK240JCA C CHIP CERA 50V CH 24PE J 2012 C309 HCLK470JCA...
  • Page 38 K5J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C420 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF 2012 C814 CEXF1C101A C ELECTRO 16V RSM 100MF (6.3X7) TP C501 CEXE0J221S C ELECTRO 6.3V RSA 220MF 6.3X7 C815 CEXF1C470A C ELECTRO...
  • Page 39 K5J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION P801 97P62Y02X2 CONN WAFER YFW800 STR 10MM 2P R215 HRFT102JCA R CHIP 1/10 1K OHM J 2012 PA401 97P6289620 CONN HOU. 00-8370-071-000-800 R216 HRFT229JCA R CHIP 1/10 2.2 OHM J 2012 PT01 97P6289000...
  • Page 40 K5J5ABOM REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION R515 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R635 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R516 HRFT153JCA R CHIP 1/10 15K OHM J 2012 R638 HRFT104JCA R CHIP...

  • Page 41: Connection Diagram (Dv-K8J5A)

    CONNECTION DIAGRAM (DV-K8J5A)

  • Page 42: Connection Diagram (Dv-K5J5A)

    CONNECTION DIAGRAM (DV-K5J5A)

  • Page 43: Power Supply Schematic (Dv-K8J5A/K5J5A/K5L5A)

    POWER SUPPLY SCHEMATIC (DV-K8J5A/K5J5A/K5L5A)

  • Page 44: Timer Circuit (Dv-K8J5A)

    TIMER CIRCUIT (DV-K8J5A)

  • Page 45: Timer Circuit (Dv-K5J5A/K5L5A)

    TIMER CIRCUIT (DV-K5J5A/K5L5A)

  • Page 46: Servo/Syscon Schematic Diagram (Dv-K8J5A)

    SERVO/SYSCON SCHEMATIC DIAGRAM (DV-K8J5A)

  • Page 47: Servo/Syscon Schematic Diagram (Dv-K5J5A/K5L5A)

    SERVO/SYSCON SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A)

  • Page 48: Video & Audio Schematic Diagram (Dv-K8J5A)

    VIDEO & AUDIO SCHEMATIC DIAGRAM (DV-K8J5A)

  • Page 49: Video & Audio Schematic Diagram (Dv-K5J5A/K5L5A)

    VIDEO & AUDIO SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A)

  • Page 50: Pif & Mpx Schematic Diagram (Dv-K8J5A)

    PIF & MPX SCHEMATIC DIAGRAM (DV-K8J5A)

  • Page 51: Pif Schematic Diagram (Dv-K5J5A/K5L5A)

    PIF SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A)

  • Page 52: 4Hd(Hi-Fi) Preamp Circuit Diagram (Dv-K8J5A)

    4HD(Hi-Fi) PREAMP CIRCUIT DIAGRAM (DV-K8J5A) R456 10K(C) R455 8.2K(C) TO MICOM N(H) Q451 KSR1004 R457 13K(A)

  • Page 53: 4Hd(Mono) Preamp Circuit Diagram (Dv-K5J5A/K5L5A)

    4HD(MONO) PREAMP CIRCUIT DIAGRAM (DV-K5J5A/K5L5A)

  • Page 54: Osd Schematic Diagram (Dv-K8J5A)

    OSD SCHEMATIC DIAGRAM (DV-K8J5A)

  • Page 55: Osd Schematic Diagram (Dv-K5J5A/K5L5A)

    OSD SCHEMATIC DIAGRAM (DV-K5J5A/K5L5A)

  • Page 56: Hi-Fi Audio Schematic Diagram (Dv-K8J5A)

    Hi-Fi AUDIO SCHEMATIC DIAGRAM (DV-K8J5A)

  • Page 57: Exploded View And Parts List

    EXPLODED VIEW AND PARTS LIST DV-K5J5A/K8J5A...

This manual is also suitable for:

Dv-k5j5a

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