Daewoo DVST8E32A-SN1 Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. VCR
  5. DVST8E32A-SN1
  6. Service manual
Daewoo DVST8E32A-SN1 Service Manual

Daewoo DVST8E32A-SN1 Service Manual

T7-mecha
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
S/M N o . : VTG 8E2AET0
S ervice M anual
V ideo C assette R ecorder
T7-MECHA
M odel : DVST8E32A-SN1
DVST5E32A-SN1
DAEWOO ELE CTRONICS Corp
http : //svc.dwe.co.kr
Nov. 2003

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DVST8E32A-SN1 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Daewoo DVST8E32A-SN1

Summary of Contents for Daewoo DVST8E32A-SN1

  • Page 1 S/M N o . : VTG 8E2AET0 S ervice M anual V ideo C assette R ecorder T7-MECHA M odel : DVST8E32A-SN1 DVST5E32A-SN1 DAEWOO ELE CTRONICS Corp http : //svc.dwe.co.kr Nov. 2003...
  • Page 2 TABLE OF CONTENTS SAFETY&PRECAUTIONS ....................2 EXTERNAL VIEWS ......................4 FRONT VIEWS FUNCTION ........................4 REAR VIEWS FUNCTION ........................8 REMOTE CONTROL ..........................8 ELECTRICAL ADJUSTMENT ....................9 SPECIFICATIONS ......................10 VOLTAGE CHART ......................11 CIRCUIT DIAGRAM .......................14 POWER SUPPLY SCHEMATIC DIAGRAM(VCR S/A) ................14 SERVO &...

  • Page 3: Safety&Precautions

    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 SAFETY&PRECAUTIONS 4. Leakage current test Confirm specified or lower leakage current between B(earth ground, power cord plug prongs) and externally exposed accessi- ble parts (RF terminals, antenna terminals, 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 accessible parts.

  • Page 5: External Views

    EXTERNAL VIEWS 1. FRONT VIEWS FUNCTION DV-T8D/T5D (T-5) DV-T87/T57 DV-T6A1 DV-T8W/T5W...
  • Page 6 EXTERNAL VIEWS DV-T8T/T5T DV-T5M DV-T56 DV-T59/T89...
  • Page 7 EXTERNAL VIEWS DV-T5B/T1B DV-T8L/T5L DV-T8E/T5E DV-T1T...
  • Page 8 EXTERNAL VIEWS DV-T53 POWER REWIND/REVIEW STOP / EJECT FAST FORWARD / CUE RECORD PLAY BACK FRONT VIDEO / AUDIO INPUT JACK CHANNEL UP / DOWN...

  • Page 9: Rear Views Function

    EXTERNAL VIEWS 2. REAR VIEWS FUNCTION Hi-Fi REAR VIEW 4HD/2HD MONO REAR VIEW 3. REMOTE CONTROL VR-F2PD VR-F2PC VR-F2TG VR-F2CT VR-F2TH VR-F2RG...

  • Page 10: Electrical Adjustment

    ELECTRICAL ADJUSTMENT 1. PLAYBACK PHASE ADJUSTMENT TEST TEST INPUT ITEM MODE CHECK POINT POINT EQUIPMENT TAPE SIGNAL 6.5H PIN 3 & PIN 4 (DP-2) PLAY [REC] BUTTON OSCILLOSCOPE NO SIGNAL ADJUSTMENT OF PT01 (PAL-N) 6.5H PIN 3 & PIN 4 PAL-M PLAY [REC] BUTTON...

  • Page 11: Specifications

    SPECIFICATIONS GENERAL Power Requirement AC 90~260V, 50Hz , 60Hz Power Consumption Max. 17W (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 91 x 239 (mm) Weight Approx.

  • Page 12: Voltage Chart

    VOLTAGE CHART EEPROM (IC603, 24LC04B) PIN NO. A/V CHIP IC (IC301, LA71730) PIN NO. PIN NO. PIN NO. PIN NO. 0.84 0.08 1.56 2.36 1.42 0.84 0.01 2.15 1.55 2.69 2.39 2.24 4.59 3.93 2.32 2.68 3.33 2.36 0.01 2.65 2.48 1.79 2.33...
  • Page 13 VOLTAGE CHART PIN NO. PIN NO. PIN NO. PIN NO. 2.46 2.43 2.54 2.54 0.76 0.76 3.24 1.96 2.63 2.64 1.68 1.69 0.76 0.76 3.47 1.96 2.63 3.46 2.33 2.64 2.32 2.24 3.11 2.49 1.06 2.32 1.87 0.13 3.41 2.37 0.72 2.41 2.24...
  • Page 14 VOLTAGE CHART TMI (RF101, ALTMI-US5) PIN NO. PIN NO. PIN NO. SIGNAL SWEEP SWEEP SIGNAL SIGNAL 5.1/0 5.1/0 PULSE PULSE 31.7 31.7 PULSE PULSE SIGNAL SIGNAL 5.1/0 SIGNAL SIGNAL SIGNAL SIGNAL SMPS IC(IC801, ICE2B365) RESET IC (IC602,BMR-0301G) PLAY PIN NO. PIN NO.

  • Page 15: Circuit Diagram

    CIRCUIT DIAGRAM 1. POWER SUPPLY SCHEMATIC DIAGRAM (VCR S/A)

  • Page 16: Servo & Syscon Schematic Diagram(Vcr S/A)

    CIRCUIT DIAGRAM 2. SERVO & SYSCON SCHEMATIC DIAGRAM (VCR S/A)

  • Page 17: Video/Audio Schematic Diagram (Hi-Fi)

    CIRCUIT DIAGRAM 3. VIDEO/AUDIO SCHEMATIC DIAGRAM (HIFI)

  • Page 18: Video/Audio Schematic Diagram (Mono)

    CIRCUIT DIAGRAM 4. VIDEO/AUDIO SCHEMATIC DIAGRAM(MONO)

  • Page 19: Tmi & Mpx Schematic Diagram(Hi-Fi)

    CIRCUIT DIAGRAM 5. TMI & MPX SCHEMATIC DIAGRAM(HIFI)

  • Page 20: Tmi & Mpx Schematic Diagram(Mono)

    CIRCUIT DIAGRAM TMI &MPX SCHEMATIC DIAGRAM(MONO)

  • Page 21: Waveforms On Video Circuit

    WAVEFORMS ON VIDEO CIRCUIT 1. WAVEFORMS IN THE EE MODE(COLOR BAR INPUT) Pin48,50,52 of IC301 Pin 65 of IC301 (NTSC color bar output : (NTSC color bar input : 2.0Vp-p) 1.0Vp-p) 2. WAVEFORMS OF THE LUMINANCE IN THE RECORD MODE(COLOR BAR INPUT) Pin 43 of IC301 Pin 88,89 of 94,95 IC301(NTSC) Pin 46 of IC301...
  • Page 22 WAVEFORMAS ON VIDEO CIRCUIT 4. WAVEFORMS OF THE LUMINANCE IN THE PB MODE (DTN-1 TEST TAPE) [10] UP : Pin 70 of IC301(color Pin 46 of IC301 Pin 43 of IC301 rotary : 5Vp-p (0.5Vp-p) (0.5Vp-p) DOWN : Pin 21 of IC301 (ENVE : 0.5Vp-p) [11] Pin 05 of IC301...

  • Page 23: Components Location Guide On Pcb Bottom View

    COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW 1. PCB MAIN...
  • Page 24 COMPONENTS LOCATION OF MAIN PCB C CHIP C CHIP C CERA C ELECTRO LOC. X(Dimension) Y(Dimension) LOC. X(Dimension) Y(Dimension) (Dimension) (Dimension) (Dimension) (Dimension) C326 134.75 52.25 C802 283.25 C328 124.25 C102C A 9.75 13.25 C607 143.5 148.5 C803 283.25 35.75 C330 118.75 45.75...
  • Page 25 COMPONENTS LOCATION OF MAIN PCB CONNECTOR R CHIP R CHIP LOC. X(Dimension) Y(Dimension) LOC. X(Dimension) Y(Dimension) LOC. X(Dimension) Y(Dimension) LOC. X(Dimension) Y(Dimension) R227 RJ004 135.75 59.5 P703 50.5 IC251 D 101.125 30.625 R228 183.5 11.25 RJ005 318.75 159.5 P801 5.25 IC301 135.75 33.75...
  • Page 26 R AXIAL R AXIAL LOC. X(Dimension) Y(Dimension) LOC. X(Dimension) Y(Dimension) R502 190.25 RS02 124.25 143.75 R503 190.25 122.5 RS03 122.75 134.25 R507 90.5 RS04 136.5 142.75 R509 97.5 RS05 R510 218.25 R511 245.25 87.5 SWITCH R512 247.75 80.75 LOC. X(Dimension) Y(Dimension) R513 245.25 84.75...

  • Page 27: Disassembly

    DISASSEMBLY 1. PACKING ASS'Y...

  • Page 28: Instrument Disassembly

    DISASSEMBLY 2. INSTRUMENT DISASSEMBLY 2-1. TOP COVER REMOVAL ( FIG.1 ) 1) Remove two (2) screws holding the top cover. 2) Carefully lift the back of the top cover and slide it to the rear to remove it.
  • Page 29 DISASSEMBLY 2-2. FRONT PANEL REMOVAL ( FIG.2 ) 1) Continued from(Fig.1). 2) Release three (3) bottom tabs holding the front panel. 3) Remove the front panel.
  • Page 30 DISASSEMBLY 2-3. DECK ASSEMBLY REMOVAL ( FIG.3 ) 1) Remove the top cover and front panel. 2) Disconnect the FPC(A). 3) Remove five(5) screws.--(B:5EA) 4)Pull out the Deck Assembly in the direction of the arrow.
  • Page 31 DISASSEMBLY 2-4. DECK ASSEMBLY REMOVAL ( FIG.4 ) 1) Remove the top cover ,the front pane and the deck assembly. 2) Remove two(2) screws(A) 4) Release three(3) tabs(b) and lift out the Main PCB in the direction of the arrow..
  • Page 32 DISASSEMBLY 2-5. F/L DOOR REMOVAL( FIG.5 ) 1) Open the F/L door 90 degrees . 2) Remove the F/L door in the direction of the arrow.

  • Page 33: Electrical Parts List

    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). R is a recommendable part for stock.
  • Page 34 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK C332 HCQK121JBA C CHIP CERA 50V CH 120PF J 1608 R103 HRFS102JBA R CHIP 1/16 1K OHM J 1608 C333 HCQK201JBA C CHIP CERA 50V CH 200PF J 1608 R109 HRFS750JBA...
  • Page 35 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK R603 HRFS104JBA R CHIP 1/16 100K OHM J 1608 C206 CEXF1C220A C ELECTRO 16V RSM 22MF (5X7) R604 HRFS511JBA R CHIP 1/16 510 OHM J 1608 C208 CEXF1C220A C ELECTRO...
  • Page 36 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK C330 CEXF1C101A C ELECTRO 16V RSM 100MF (6.3X7) TP L301 5CPX100J2T COIL PEAKING 10UH(BRN-BLK) C331 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP L302 5CPX100J2T COIL PEAKING...
  • Page 37 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK C615 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) R230 RD-AZ223J- R CARBON FILM 1/6 22K OHM J C622 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) R253 RD-AZ113J-...
  • Page 38 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK R636 RD-AZ103J- R CARBON FILM 1/6 10K OHM J C829 CEXK1V471L C ELECTRO 35V 470MF KXL R637 RD-AZ102J- R CARBON FILM 1/6 1K OHM J C830 CEXF1V221V C ELECTRO...
  • Page 39 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK C301 HCFH473ZBA C CHIP CERA 25V Y5V 0.047MF Z 1608 C703 HCFH104ZBA C CHIP CERA 25V Y5V 0.1MF Z 1608 C302 HCFH223ZBA C CHIP CERA 25V Y5V 0.022MF Z 1608 CS01 HCQK220JBA...
  • Page 40 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK R312 HRFS203JBA R CHIP 1/16 20K OHM J 1608 RJ201 HRFS000-BA R CHIP 1/16 0 OHM 1608 R313 HRFS272JBA R CHIP 1/16 2.7K OHM J 1608 RJ204 HRFS000-BA R CHIP 1/16 0 OHM 1608...
  • Page 41 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK C603 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP Q211 TZTC3198Y- TRANSISTOR KTC3198Y-(1815Y) (AUTO) C616 CEXF1V101V C ELECTRO 35V RSS 100MF (8X11.5) TP Q805 TZTC3205Y- KTC3205Y (2236Y)
  • Page 42 ELECTRICAL PARTS LIST PART CORD PART NAME PARTS DESCRIPTION REMARK PART CORD PART NAME PARTS DESCRIPTION REMARK D806 DZ1F3E---- DIODE FR 1F3E R514 RN-AZ103F- R METAL FILM 1/6 10K OHM F D814 DZN4148--- DIODE 1N4148 AUTO 52MM R515 RD-AZ203J- R CARBON FILM 1/6 20K OHM J D817 DZ1F3E----...

  • Page 44: Trouble Shooting Flow Chart

    TROUBLE SHOOTING FLOW CHART 1. POWER CIRCUIT NO POWER Exchange Power Cord Power Cord is OK? Check F801 Exchange F801 Is 140~440V voltage Check C801, L801, obtained at C805+? D801~D804, R802 Check rectifier Diode of 2nd parts? Exchange Diode Switching pulse of IC801 Pin4 Exchange IC801 or Pin5 is normal?
  • Page 45 TROUBLESHOOTING FLOW CHART 2. SERVO-SYSCON CIRCUIT Playback picture Adjust tracking. is not good Noise appears Noise appears Check and re-adjust although although change the path of Deck. adjusting tracking. cassette tape. CTL HEAD height Adjust the HEAD Is CTL pulse output is normal and height and at pin 97 of IC 601?
  • Page 46 TROUBLESHOOTING FLOW CHART Playback picture is not good. Noise appears on the Noise appears on the Check flow A. screen on the whole. screen at the bottom Adjust the PG in SVC mode. Is SW-pulse applied to Is sw pulse supplied Check D.PG input video IC? from pin 18 of IC 601?
  • Page 47 TROUBLESHOOTING FLOW CHART Auto-stop during playback. Is reel pulse applied to Check reel sensor. pin 79 and 80 of IC 601? Is D. FG applied to Check connector and pin 90 of IC 601? D. FG circuits. Check IC 601.
  • Page 48 TROUBLESHOOTING FLOW CHART Drum M/T loading stops. Check D816,D821 Is motor 12V supplied of Line Ever 12V. from P603 pin2? Check power parts. Is D speed CTL from Check R508,C514,R509. P603 pin12? Check connector and motor.
  • Page 49 TROUBLESHOOTING FLOW CHART Capstan M/T loading stops. Is motor 16V supplied? Check D816, D822 Exchange Check Q809,Q810 Q809, Q810 Check D820,D815 of Is motor 26V supplied? Line Ever26V Is the input of pin 9 Check circuit of R511, R510, C512 of P603? Check POWER part.
  • Page 50 TROUBLESHOOTING FLOW CHART Drum M/T and capstan M/T rotate at regular speed. (IN REC MODE) Is C. sync applied to Check C. sync of video pin 58 of IC 601? IC and pattern. Check motor Emergency mode when plugging (power cord) Is ever 5V applied? Check power Parts.
  • Page 51 TROUBLESHOOTING FLOW CHART Cassette is not inserted. Check power Parts. L.C 12V supplied?(P603,pin8) Check Sw501 CAM Mode SW is changed or to see CAM mode table. when CST IN? Is Signal supplied at Check Deck part. pin 84 of IC 601? Change to CAM SW Check IC 604.
  • Page 52 TROUBLESHOOTING FLOW CHART Power compensation does not operate. When mains is unplugged, Check E5V part. Is 5V at pin 37 of IC 601? Is (sine) signal applied to Check X602. pin 35 and 36 of IC 601? 1)Is 5V at pin 34 of IC 601? Check reset circuit 2) Is POWER Fail pin 100 of IC601? of IC504.
  • Page 53 TROUBLESHOOTING FLOW CHART 3. AUDIO CIRCUIT 3-1. Hi-Fi model A. TROUBLESHOOTING OF EE MODE NO sound in the EE mode. Is 12V supplied to pin 58 of IC 251? Is 5V supplied to pin 25,40 of Check power circuit. IC 251 and pin 75 of IC 301? Is signal input pin9,14 of IC 251 Check INPUT JACK.
  • Page 54 TROUBLESHOOTING FLOW CHART B. TROUBLESHOOTING OF Hi-Fi PB MODE NO Hi-Fi sound in playback mode of Hi-Fi recorded tape Is the ENVE level of IC 251 pin Check the PRE-AMP circuit. 29,30 more than 200mVp_p? Is A.SW PULSE input into pin27 Check IC 601.
  • Page 55 TROUBLESHOOTING FLOW CHART C. TROUBLESHOOTING OF Hi-Fi REC MODE NO Hi-Fi soung in the playback mode after Hi-Fi recording. Check the following procedure in RECORD mode. Is the signal supplied to Check RF101. pin 48 of IC 251? Is 5V base of Q205? Check IC601.
  • Page 56 TROUBLESHOOTING FLOW CHART D. TROUBLESHOOTING OF NORMAL PB MODE NO sound in the normal playback mode. Is 12V supplied to pin 58 of Is the output at pin 53,57 of IC 251? Check Power circuit. Ic251? Is 5V supplied to pin25,40 of IC 251 Check Power circuit.
  • Page 57 TROUBLESHOOTING FLOW CHART E. TROUBLESHOOTING OF NORMAL REC MODE No normal sound in the playback mode after normal recording. Check the following procedure in RECORD mode. Is the signal supplied to pin 9,14 Check INPUT JACK of IC 251 and pin15 of IC301? Check IC 601.
  • Page 58 TROUBLESHOOTING FLOW CHART 3-2. Normal model A. TROUBLESHOOTING OF EE MODE NO sound in the EE mode. Check power circuit. Is 5V supplied to pin 18 of IC 301? Is signal input pin15 of IC 301 Check INPUT JACK. in the l mode? Is 0V supplied to pin 71 of IC 301? Check SYSCON circuit Change IC 301.
  • Page 59 TROUBLESHOOTING FLOW CHART B. TROUBLESHOOTING OF PB MODE NO sound in the playback mode. Is 5V applied to pin 18 of Is the output at pin 11 of IC 301? Check Power circuit. IC 301? Check R236,R270, C297. Is 0V supplied to pin71 of IC301? Check IC 601.
  • Page 60 TROUBLESHOOTING FLOW CHART C. TROUBLESHOOTING OF REC MODE No sound in the playback mode after recording. Check the following procedure in RECORD mode. Is the signal supplied to pin 15 Check INPUT JACK of IC 301? Check IC 601. Is pin71 of IC301 0V? Is there output at pin100 of Check IC301.

  • Page 61: Video Circuit

    TROUBLESHOOTING FLOW CHART 4. VIDEO CIRCUIT A. TROUBLESHOOTING OF EE MODE EE MODE picture NG Is the video signal input into Check PIF circuit and LINE IN JACK pin 48,50,52 of IC301? Is 5V supplied at pin24,42, 72,91 Check power circuit IC301? Is the CLK-DATA signal Input pin 68, 69...
  • Page 62 TROUBLESHOOTING FLOW CHART B. TROUBLESHOOTING OF PB MODE PB video signal missing. Check IC 601 pin72,71 Is CLK-DATA signal input pin68,69 of IC301? Is 5V supplied at IC301 pin91? Check power ciruit Is envelope out from pin 21 of IC 301? Check IC601 pin18 Is SW pulse input into IC301 pin70? Clean head of change head...
  • Page 63 TROUBLESHOOTING FLOW CHART C. TROUBLESHOOTING OF RECORD MODE Record video signal NG. Check EE mode. Is luminance and color signal Is signal input into Output from IC301 pin48,50,52? IC301 pin 21, 46? Is +5V supplied at Check Power circuit. IC301 pin91? Is REC(H) signal supplied Check REC(H) IC301 pin80?
  • Page 64 TROUBLESHOOTING FLOW CHART D. TROUBLESHOOTING OF OSD MODE OSD Characer incorrect. Is +5V supplied at Ic601 Check Power circuit pin 53,98,99? Does X602,XS01 crystal oscillate? Check X602,XS01. X601:14.3181(NTSC) XS01:14.30244(PAL-M) XS01:14.32822(PAL-N) Change IC 601.
  • Page 65 µ -COM PORT DESCRIPTION PIN NO Name Assignment ACTIVE CONNECT OPTION 1 system option color killer nothing mode sap /stereo OPTION 2 nothing OPTION 3 DOT LED OPTION PATH ADJ Path Adjust FF/REW(H) Capstan Vcc Selection(12V or 26V) AFT analog data input for auto CH setting HI-FI (H) HI-FI DET CONTROL HI-FI...
  • Page 66 µ -COM PORT DESCRIPTION PIN NO Name Assignment ACTIVE CONNECT X IN 14.30244MHZ OSC IN X OUT 3 14.30244MHZ OSC OUT CLK SELL OSD in 2 OSD OUT out 2 FSC IN OSD GND VIDEO IN OSD VIDEO IN VIDEO LECHA USE FOR OSD LEVEL ADJUSTMENT VIDEO OUT...
  • Page 67 µ-COM PORT DESCRIPTION PIN NO Name Assignment ACTIVE CONNECT OPTION 4 CLOCK FAST TEST SUPPLY REEL SUPPLY REEL PULSE INPUT PULSE SUPPLY REEL TAKE UP REEL TAKE UP REEL PULSE INPUT PULSE TAKE UP REEL NONE LM F / R LOADING MOTOR FORWARD/ REVERSE CTL L MOTOR NONE...

This manual is also suitable for:

Dvst5e32a-sn1Dv-t8dDv-t87Dv-t5dDv-t57Dv-t6a1 ... Show all

Table of Contents