DAEWOO ELECTRONICS DV-S123W Series Service Manual
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DAEWOO ELECTRONICS DV-S123W Series Service Manual

DAEWOO ELECTRONICS DV-S123W Series Service Manual

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Service Manual
Video Cassette Recorder
Multi Models(S2-MECHA)
Model:PAL/MESECAM/NTSC
 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).
DAEWOO ELECTRONICS CO., LTD.
S/M No. : VS123MUEF1
(DV-S123W Series)
(DV-S103W Series)
PAL-N/NTSC
(DV-S123A Series)
(DV-S103A Series)
NTSC Only Models
(DV-S123N Series)
(DV-S103N Series)
URL : http://svc.dwe.co.kr

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Summary of Contents for DAEWOO ELECTRONICS DV-S123W Series

  • Page 1 : 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). DAEWOO ELECTRONICS CO., LTD. URL : http://svc.dwe.co.kr...

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com TABLE OF CONTENTS SAFETY&PRECAUTIONS ....................2 EXTERNAL VIEWS ......................4 1. FRONT VIEWS FUNCTION ....................... 4 2. REAR VIEWS FUNCTION ......................... 5 GENERAL ADJUSTMENT ....................6 SPECIFICATIONS ....................... 7 TROUBLE SHOOTING GUIDE ..................8 1.

  • Page 3: Safety&Precautions

    All manuals and user guides at all-guides.com SAFETY&PRECAUTIONS SAFETY CHECK AFTER SERVING Examine the area surrounding the repaired location for damage or deterioration. Observe that screw, parts and wires have been returned to original positions. Afterwards, perform the following tests and conform the specified values in order to verify compliance whit safety standards.
  • Page 4 All manuals and user guides at all-guides.com SAFETY&PRECAUTIONS 4. Leakage current test Confirm specified or lower leakage current between B(earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna termi- nals, video and audio input output terminals, microphone jacks, earphone jacks, etc.) Measuring method:(Power ON) Insert load Z between B(earth ground, power cord plug prongs) and exposed...

  • Page 5: External Views

    All manuals and user guides at all-guides.com EXTERNAL VIEWS 1. FRONT VIEWS FUNCTION DV-S103W FRONT VIEW DV-S123W FRONT VIEW POWER REVIND / REVIEW STOP / EJECT FAST FORWARD / CUE RECORD PLAY BACK FRONT VIDEO AUDIO INPUT JACK...

  • Page 6: Rear Views Function

    All manuals and user guides at all-guides.com EXTERNAL VIEWS 2. REAR VIEWS FUNCTION DV-S103W & DV-S123W PHONE JACK TYPE REAR VIEW AUDIO/ VIDEO IN/OUT JACK ANT INPUT DC12V INPUT JACK RE OUTPUT DV-S103W & DV-S123W SCART JACK TYPE REAR VIEW EURO AUDIO / VIDEO IN/OUT JACK ANT INPUT DC12V INPUT JACK...

  • Page 7: General Adjustment

    All manuals and user guides at all-guides.com GENERAL ADJUSTMENT SERVO CIRCUIT ADJUSTMENT ITEM CHECK POINT TEST EQUIPMENTS MODE TEST TAPE PARTS Playback TJ591(V.SW) R591 Oscilloscope Play DP-2 Phase TJ391(VIDEO OUT) LOCATION OF ADJUSTMENT PARTS OBSERVATION WAVEFORM A/V JACK SMPS PRE-AMP TJ391 (VIDEO OUT) TJ591...

  • Page 8: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS SYSTEM Video signal PAL/MESECAM/NTSC color (for DV-S103W Series) PAL-N/NTSC color (for DV-S103A Series) RF Output NTSC color (for DV-S103N Series) PAL-G/K/I UHF CH22 ~ CH40 (for DV-S103W & DV-S103S Series) NTSC-M VHF CH3 OR CH4 (for DV-S103A &...

  • Page 9: Trouble Shooting Guide

    All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE 1. TROUBLE SHOOTING FLOW CHART A. POWER CIRCUIT When changing the parts which are out of order, first, remove the power plug from the socket and then discharge the voltage across between both terminals of C803. (Use an external approximately 20 resistance) When check the primary circuit by using the oscilloscopes insulate the oscilloscope properly (Use the insulating trans- former)and GND must be connected GND into the primary GND (But there is no connection when checking the seca- ondary circuit.
  • Page 10 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE A-3. CHECKING THE DC - INPUT CIRCUIT. Do not turn on the front DISPLAY Check the polarity of Change the DC adptor DC adaptor Is Vcc input at pin1 of Check JK801 and pattern IC803? Check SERVO/SYSCON...
  • Page 11 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE C. SERVO/SYSCON CIRCUIT C-1. FRONT KEYS Front keys do not operate correctly Is +5.1V supplied to pin18 Check power module of IC501? Is +5.1V supplied to the Check u-com, JP053 and emitter of Q502? JP059 Is +5.1V input at pin41 of...
  • Page 12 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE C-3. PICTURE IN PB MODE PB picture is not good Noise appears on the Noise appears on the Check flow C-2 screen on the whole? screen at the bottom? Is V-SW puls applied to Is V-SW pulse supplied Adjust the PG delay PREAMP circuit?
  • Page 13 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE C-5. CASSETTE IS NOT INSERTED Cassette is not inserted Is ON/OFF 12V supplied Check power module at pin7 of IC503? CAM data are changed Check P504 Check DECK when CST IN? Is +5V applied to pin6 Is control signal output Check IC501...
  • Page 14 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE C-6. CAPSTAN MOTOR Capstan M/T loading stops Is +14V supplied to pin7 Check power module of P501? Is the input of P502's pin6 Check circuit of R555, 2.5 ~ 3.5V? R556 and R557 Is pin4 of P501 2.5V? Check R559 and R560...
  • Page 15 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE C-8. EMERGENCY Emergency mode when plugging (power cord) Is +5.1V applied to pin18 Check power module of IC501? Does X501 crysyal Check IC501 and crystal oscillate? circuit Are CAM SW data cor- Recheck P504 and CAM rect? SW contact...
  • Page 16 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE D. AUDIO CIRCUIT D-1. PB MODE No sound in the PB mode Is +5V supplied to pin76 of Is the output at pin77 of Check IC802 and adjacent IC301 and to pin2 of IC301? circuit T201?
  • Page 17 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE D-2. NO SOUND IN THE PB MODE AFTER RECORDING IN REC MODE Is signal audio input into Check R609, R610 and pin71 of IC301? JK603 Is +5V applied to pin76 Check IC802 and adjacent and 47 of IC301? circuit...
  • Page 18 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE D-3. EE MODE No sound in the EE mode Is video signal input at TO VIDEO EE MODE pin30 of IC301? Is signal input into pin71 Check R609, R610, C218 of IC301? and JK603 Is signal output at pin77 of...
  • Page 19 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E. VIDEO CIRCUIT E-1. EE MODE No output at pin19 of JK601 or JK602? Is ON/OFF 12V supplied Check IC801 and adjacent to R603 and R604? circuit Is video signal output at Is video signal input at Check JK603 and pattern pin38 of IC301?
  • Page 20 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E-2. PREAMP IN THE PAYBACKMODE Is signal from heads fed to Check the DRUM and pin1 and 3 of P401? DECK mechanism Is ON/OFF5V from pin76 of IC301 supplied to Check the ON/OFF 5V pin131 of IC401 at 5V? Is REC(H) from pin79 of...
  • Page 21 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E-3. LUMINANCE IN THE PALYBACK MODE Is the RF signal obtained TO PREAMP IN THE from pin13 of IC401? PLAYBACK MODE Is the RF signal from pin7 Check Q401 and adjacent of IC301? Is ON/OFF 5V supplied to Check the ON/OFF 5V...
  • Page 22 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E-4. COLOUR IN THE PLAYBACK MODE Is the RF signal obtained TO PREAMP IN THE from pin13 of IC401? PLAYBACK MODE Is the RF signal from pin13 Check Q401, adjacent of IC401 fed to pin15 of and PCB pattern IC301?
  • Page 23 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E-5. PREAMP CIRCUIT IN THE RECORD MODE Is the Y.FM signal from Check R305, C405 Change damaged pin18 of IC301 fed to correct? components pin9 of IC401? TO LUMINANCE SIGNAL IN THE REC MODE Is the down converted Colour signal from pin14...
  • Page 24 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E-6. LUMINANCE SIGNAL IN THE RECORD MODE Is ON/OFFF 5V supplied Check the ON/OFF 5V to pin36 and 47 of IC301? Is the obtained from pin34 TO EE MODE of IC301? Is the signal from pin34 of Change damaged IC301 fed to pin25 of...
  • Page 25 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE E-7. COLOUR SIGNAL IN THE RECORD MODE Is ON/OFF 5V supplied to Check the ON/OFF 5V pin36 and 47 of IC301? Is the obtained from pin34 TO EE MODE of IC301? Is the colour signal from Check IC302, PCB .and pin50 of IC301 to pin52...

  • Page 26: Voltage Chart

    All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE 2. VOLTAGE CHART IC301 : A/V IC ( LA71501M ) MODE MODE MODE MODE PIN.NO. PIN.NO. PIN.NO. PIN.NO. 2.44 2.40 0.35 0.39 0.06 2.05 2.02 0.01 0.00 1.56 2.25 2.00 0.21 0.26 2.44...

  • Page 27: Waveforms On Video Circuit

    All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE 3. WAVEFORMS ON VIDEO CIRCUIT WAVEFORMS IN THE EE MODE(COLOR BAR INPUT) 1 Pin 30 of IC301 2 Pin 30 of IC301 3 Pin 38 of IC301 (SECAM color bar input : (PAL color bar input : (PAL color bar output : 1.0Vp-p...
  • Page 28 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE WAVEFORM OF THE PAL COLOR IN THE RECORD MODE(COLOR BAR INPUT) Pin 35 of IC301 Pin 48 and 50 of IC301 Pin 52 of IC301 (PAL color input : (300mVp-p) (400mVp-p) 1.0Vp-p) Pin 37 of IC301...
  • Page 29 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE WAVEFORMS OF THE LUMINANCE IN THE PB MODE (DP-1 TEST TAPE) UP : Pin 66 of IC301(color) Pin 37 of IC301 Pin 48 and 50 of IC301 rotary : 0.5Vp-p) (Video out : 2.0Vp-p) (240mVp-p) DOWN : Pin 20 of IC301...

  • Page 30: Ì -Com Pin Assignment

    All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE -COM PIN ASSIGNMENT ¥ ì P : Pulse H : High L : Low NAME ASSIGNMENT ACTIVE T_ REEL TAKE-UP REEL PULSE DECK(REEL) A_MUTE(H) AUDIO MUTE H OUTPUT SLOW CTL MESECAM(H) MESECAM MODE INPUT S_REEL...
  • Page 31 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE NAME ASSIGNMENT ACTIVE C_PWM CAPSTAN M/T CONTROL PWM DECK(CAPSTAN) SYSSEL1 DONT CARE SYSTEM SELECT INPUT SYSSEL2 ( Reference to SERVO/SYSCON circuit) DC_ENVE DC_ENVE INPUT IN PB MODE PREAMP TRACKING DELAY IN TRKDLY PATH JIG MANUAL TRACKING...
  • Page 32 All manuals and user guides at all-guides.com TROUBLE SHOOTING GUIDE NAME ASSIGNMENT ACTIVE RESET(L) RESET INPUT SEG_7 LED SEGMENT_7 OUTPUT L-DISPLAY SEG_6 LED SEGMENT_6 OUTPUT L-DISPLAY SEG_1 LED SEGMENT_1 OUTPUT L-DISPLAY SEG_2 LED SEGMENT_2 OUTPUT L-DISPLAY SEG_3 LED SEGMENT_3 OUTPUT L-DISPLAY SEG_4 LED SEGMENT_4 OUTPUT...

  • Page 33: Printed Circuit Board

    All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD 1. PCB MAIN...

  • Page 34: Pcb Power(Smps)

    All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD 2. PCB POWER(SMPS)

  • Page 35: Circuit Diagram

    All manuals and user guides at all-guides.com CIRCUIT DIAGRAM 1. CONNECTION DIAGRAM (DV-S103W/S103A/S103N)

  • Page 36: Power Circuit

    All manuals and user guides at all-guides.com CIRCUIT DIAGRAM 2. POWER CIRCUIT (DV-S103W)

  • Page 37: Servo Syscon Circuit

    All manuals and user guides at all-guides.com CIRCUIT DIAGRAM 3. SERVO SYSCON CIRCUIT (DV-S103W)

  • Page 38: Av Input Output Circuit

    All manuals and user guides at all-guides.com CIRCUIT DIAGRAM 4. AV INPUT OUTPUT CIRCUIT (DV-S103W)

  • Page 39: Video Audio Circuit

    All manuals and user guides at all-guides.com CIRCUIT DIAGRAM 5. VIDEO AUDIO CIRCUIT (DV-S103W/S103A/S103N/S103S)

  • Page 40: Exploding Views & Parts List

    All manuals and user guides at all-guides.com EXPLODING VIEWS & PARTS LIST 1. PACKING AS...

  • Page 41: Set Total Assembly

    All manuals and user guides at all-guides.com EXPLODING VIEWS & PARTS LIST 2. SET TOTAL ASSEMBLY...

  • Page 42: Front Panel Assembly

    All manuals and user guides at all-guides.com EXPLODING VIEWS & PARTS LIST 3. FRONT PANEL ASSEMBLY DV-S103W FRONT PANEL ASSEMBLY...
  • Page 43 All manuals and user guides at all-guides.com EXPLODING VIEWS & PARTS LIST DV-S123W FRONT PANEL ASSEMBLY...

  • Page 44: Electrical Parts List

    All manuals and user guides at all-guides.com ELECTRICAL 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) 1.
  • Page 45 All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC T201 560202L692 COIL OSC DEO-006 C522 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 X301 5XE4R433BB CRYSTAL QUARTZ HC-49/U 4.433619MHZ 15PPM C523 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012 X302...
  • Page 46 All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC RJ025 HRF8000-EA R CHIP 1/8 0 OHM 3216 R554 HRFT103JCA R CHIP 1/10 10K OHM J 2012 RJ026 HRF8000-EA R CHIP 1/8 0 OHM 3216 R557 HRFT153JCA R CHIP...
  • Page 47 All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC C702 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP C303 CCZB1H223K C CERA HIBK 50V 0.022MF K AXL 52 C703 CEXF1A471V C ELECTRO 10V RSS 470MF 8X11.5 C315 CCZB1H104K C CERA...
  • Page 48 All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST PART-CODE PART-NAME PART-DESC PART-CODE PART-NAME PART-DESC R225 RD-AZ470J- R CARBON FILM 1/6 47 OHM J R583 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R226 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R584 RD-AZ472J- R CARBON FILM...

  • Page 49: Pcb Auto Volt Regulator As

    All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST 2. PCB AUTO VOLT REGULATOR AS REF. PART CODE PART NAME PART DESCRIPTION CIRCUIT 0M801 PVPWSWW063 AUTO VOLT REGULATOR S103WY-QB/D(F13-S,M-IN) HCBK223KCA C CHIP CERA 50V X7R 0.022MF K 2012 POWER CEXF1H220F C ELECTRO 50V RX 22MF 6.3X11...

  • Page 50: Differnce Parts List

    All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST 3. DIFFERNCE PARTS LIST...
  • Page 51 All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST...
  • Page 52 All manuals and user guides at all-guides.com ELECTRICAL PARTS LIST...
  • Page 53 All manuals and user guides at all-guides.com DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “ DAEWOOELEC” E-mail : G7F00E@web.dwe.co.kr FAX : 02) 360-8184 TEL: 02) 360-8178~8187 PRINTED DATE : FEB. 1999...

This manual is also suitable for:

Dv-s103w seriesDv-s123a seriesDv-s103a series

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