Daewoo DV-F46/26N Service Manual
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Daewoo DV-F46/26N Service Manual

Daewoo DV-F46/26N Service Manual

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Service Manual
MODEL : DV-F46/26N
DV-F48/28N
DV-F54/34N
DV-F44/24N/X
PLAY
REW
FF
EJECT
POWER
STOP
REC / OTR
CH/TRACK
DAEWOO ELECTRONICS CO., LTD.

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Сергей
May 18, 2025

Нужна схема на лпм кинематическая как расположены детали на видео магнитофоне Daewoo DW -F54W

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Summary of Contents for Daewoo DV-F46/26N

  • Page 1 Service Manual MODEL : DV-F46/26N DV-F48/28N DV-F54/34N DV-F44/24N/X PLAY EJECT POWER STOP REC / OTR CH/TRACK DAEWOO ELECTRONICS CO., LTD.

  • Page 2: Specifications

    SPECIFICATIONS SYSTEM Frequency response 100 Hz-10KHz (SP) Signal to noise ratio More than 40 dB Video signal NTSC color Audio Distortion Less than 3% (SP) Channel coverage VHF Channel 2-13 UHF Channel 14-69 CATV Channel A1-A5, TAPE TRANSPORT A8, A-W, W+1-W+84 Tape width 12.65mm (1/2") VHF output signal...

  • Page 3: Safety Check After Servicing

    • Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS SECTION 1. CONTROLS AND FUNCTIONS ......................2 SECTION 2. ELECTRICAL ADJUSTMENTS 2-1. SERVO CIRCUIT ADJUSTMENT METHOD ........................5 2-2. VIDEO CIRCUIT ADJUSTMENT METHOD........................6 2-3. AUDIO CIRCUIT ADJUSTMENT METHOD........................12 SECTION 3. TROUBLE SHOOTING FLOW CHART 3-1. POWER CIRCUIT................................13 3-2. LOGIC CIRCUIT ................................15 3-3.

  • Page 5: Controls And Functions

    CONTROLS AND FUNCTIONS SECTION 1. FRONT DV-F44/24N PLAY POWER EJECT STOP REC / OTR CH/TRACK DV-F46/26N PLAY STOP EJECT REC/OTR POWER CH./TRACKING...
  • Page 6 FRONT DV-F48/28N POWER EJECT STOP PLAY DV-F54/34N POWER PAUSE STOP / STILL PLAY EJECT REC/OTR...
  • Page 7 REAR ANT.IN VIDEO AUDIO RF OUT CH.3 CH.4...

  • Page 8: Electrical Adjustment

    ELECTRICAL ADJUSTMENT SECTION 2. 2-1. SERVO CIRCUIT ADJUSTMENT METHOD 1. PB Phase Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal CH 1: PT01 ! R595 CH 2: VIDEO Oscilloscope DN-1 OUTPUT JACK Location of Adjustment Parts Observation Waveform H-Axis: 50us/div V-Axis: CH 1 ¡...

  • Page 9: Video Circuit Adjustment Method

    2-2. VIDEO CIRCUIT ADJUSTMENT METHOD 1. EE LEVER Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal LINE INPUT CH1: TJ313 Signal Gen. Color Bar # R395 & STOP CH2: TJ395 Oscilloscope with 100% white Location of Adjustment Parts Observation Waveform H-Axis: 10us/div V-Axis: 0.1v/div...
  • Page 10 2. PLAYBACK VIDEO OUTPUT LEVEL Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal CH 1: TJ313 $ 396 CH 2: VIDEO Oscilloscope DN-1 OUTPUT JACK Location of Adjustment Parts Observation Waveform H-Axis: 50us/div V-Axis: 0.5v/div MAIN PCB HEAD-AMP DECK •...
  • Page 11 3. COMB PHASE Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal LINE INPUT CH1: TJ313 Signal Gen. % R494 Multiburst & STOP CH2: TJ494 Oscilloscope Location of Adjustment Parts Observation Waveform H-Axis: 10us/div V-Axis: 20mv/div MAIN PCB HEAD-AMP DECK •...
  • Page 12 3. SYNC TIP FREQ. Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal +: TJ391 & R391 STOP Freq. Counter Without signal –: GND Location of Adjustment Parts Observation Waveform H-Axis: V-Axis: MAIN PCB HEAD-AMP DECK • Adjustment Procedure 1.
  • Page 13 5. COLOR REC CURRENT Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal LINE INPUT CH1: TJ313 Signal Gen. * R491 Color Bar & STOP CH2: TJ399 Oscilloscope Location of Adjustment Parts Observation Waveform H-Axis: 10us/div V-Axis: 20mv/div MAIN PCB HEAD-AMP DECK...
  • Page 14 6. Y REC CURRENT Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal LINE INPUT CH1: TJ313 Signal Gen. ( R399 Color Bar & STOP CH2: TJ399 Oscilloscope Location of Adjustment Parts Observation Waveform H-Axis: 10us/div V-Axis: 50mv/div MAIN PCB HEAD-AMP DECK...

  • Page 15: Audio Circuit Adjustment Method

    2-3. AUDIO CIRCUIT ADJUSTMENT METHOD 1. Audio REC Bias Mode Adjustment Parts Check Point Test Equipments Test Tape Input Signal +: TP1 ) R292 –: TP2 Audio level meter Blank tape Without signal (A/C HEAD PCB) Location of Adjustment Parts Observation Waveform H-Axis: V-Axis:...

  • Page 16: Trouble Shooting Flow Chart

    TROUBLE SHOOTING FLOW CHART SECTION 3. 3-1. POWER CIRCUIT • When change 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 C807. (Use an external scores of KΩ resistance) •...
  • Page 17 Are D809, Q801, Q802, R805 Change. and R806 normal? Is the secondary voltage EVER 5.8V and -28V normal? Are R810, D808 and Change F802 normal? Change Are R804 and D802 normal? Change Is IC801 normal? Is each voltage of secondary circuit normal? Check the trans output of NO output stage.

  • Page 18: Logic Circuit

    3-2. LOGIC CIRCUIT Digitron does not operate. Is+5V supplied to Check the Is+5V supplied to pin of IC701? Fuse of F802. CATHOD of D712? Check the connector and pattern. Is-24V supplied to pin of IC701? Is-28V at D614 Check D814 and anode? primary power circuit.
  • Page 19 Digitron is lit but key do not operate. Is each key pulse Check key matrix applied to pin , circuit. and of IC701? Check the pin serial of pin , ~ of IC701. 65 67 It has not power-failure compensation operation.
  • Page 20 When change the channel broadcast signal is not received. Is the external ANT. Change and check the connected to RF IN of connection of CABLE VCR and RF OUT of TV? Is the Power of VCR Power On and select ON and the VCR the VCR mode by indicator lit on the...

  • Page 21: Servo/Syscon Circuit

    3-3. SERVO/SYSCON CIRCUIT Playback picture is not good. Noise appears Adjust although adjusting tracking. tracking. Noise shakes up Noise appears Check and and down on the although change re-adjust the screen. cassette tape. Path of Deck. CTL HEAD height is Adjust the HEAD Is CTL pulse applied normal and there is...

  • Page 22: Video Circuit

    Playback picture is not good. Noise appears Check Flow A. on the screen whole. Are SW pulse and Is SW pulse supplied Check D.PG input HA SW applied to from pin of IC601? and connector. HEAD-AMP circuit? Is Enve.waveform Check pattern. supplied to at of PT01? Check VIDEO circuit.
  • Page 23 Drum M/T loading stops. Check power circuit. Is Motor 12V supplied? Is pin D.FG of Check C505, R506, R507 IC601 supplied? and C516. Is pin D.PWM (pin ) Check IC601. of IC601 supplied? Check connector and Motor. Capstan M/T loading stops. Is Motor 12V supplied? Check power circuit.
  • Page 24 Drum M/T and Capstan M/T rotate at regular speed (In REC mode). Is C. Sync applied to Check C. Sync of pin of IC601? VIDEO IC and Pattern. Check Motor. Emergency mode when connecting the Power cord. Is EVER 5V supplied? Check power circuit.
  • Page 25 Cassette is not inserted. Check power circuit. Is Motor 12V supplied? Is there the changes Check connector. Check DECK part. CAM DATA when CST IN? Is 5V applied to pin Is 5V supplied at Check PATTERN. IC602 when CST IN? of IC601? Check IC601.

  • Page 26: Audio Circuit

    3-4. AUDIO CIRCUIT No sound in the playback mode. Is the output at pin Is 9V applied to pin Check Q204 and of IC201? of IC201? power circuit. Is 5V applied to pin of IC201? Check IC601. Is pin of IC201 0V? Is there Audio output pin of IC201? Is pin of IC201 GND?
  • Page 27 No sound in the playback mode after reccording. Is the signal applied to Check circuit adjacent pin of IC201? to IC151. Is 5V applied to Check IC601. pin of IC201? Is there output at Check IC201. pin of IC201? Is the voltage above 10V Does T201 oscillate? Check IC201.

  • Page 28: Video Circuit

    3-5. VIDEO CIRCUIT A.EE MODE PIcture N.G Is video signal input Check PIF circuit into pin of IC151? and LINE IN JACK. Is 12V supplied at Check ON/OFF 12V circuit. of IC151? Check IC601 pin. Is signal output from Tuner mode : H Chage IC601.
  • Page 29 B. PB VIDEO SIGNAL N.G Is envelope output from Is 5V supplied at Check power IC401 , pins? IC401 pin? circuit. Is sw pulse input into Check IC601 IC401 pin? pin. Claen head or change head. Is signal input at Check QA05, IC301 pin?
  • Page 30 C. REC VIDEO SIGNAL N.G Check EE mode. Is Luminance and Color Is signal input into signal output Check INPUT selector circuit. IC301 pin? from IC301 pin? Is REC signal input Check Q311, Q312. Check R399, R491. into IC401 pin? Is +5V supplied at Check power circuit.
  • Page 31 D . OSD Character N.G Is 5V supplied at ICS01 and pins? Check ON/OFF 5V. Check oscillation of ICS01 , . Check XS01 (14.3MHz). 16 17 Check serial data (ICS01 pin). Check IC601. Change ICS01 and check OSD circuit. E . OSD Character N.G Is 5V supplied at Check ON / OFF 5V.

  • Page 46: Voltage Chart

    VOLTAGE CHART SECTION 6. 6-1. IC VOLTAGE (SP MODE) 1. IC151 (MC14053B) MODE MODE LINE LINE PIN NO PIN NO 12.0 12.0 12.0 12.0 12.0 2. ICS01 (168K88E6ML) MODE MODE LINE LINE PIN NO PIN NO...
  • Page 47 3. IC701 (M34240M2-XXXSP) MODE MODE PIN NO PIN NO -7.5 -19.9 -20.1 -23.2 -23.3 -23.3 -23.3 -23.3 -23.6 -23.3 -23.3 -23.3 -20.1 -23.3 -20.1 -23.3 -23.3 -20.1 -23.2 -23.2...
  • Page 48 4. IC201 (BA7790LS) MODE MODE PIN NO PIN NO -1.5 5. IC303 (LC7975) MODE MODE REC/PB REC/PB PIN NO PIN NO...
  • Page 49 6. IC301 (LA7184) MODE MODE PIN NO PIN NO...
  • Page 50 7. ICA01 (LA7374) MODE MODE PIN NO PIN NO 8. IC602 (TA7288P, DBL2018C) MODE MODE REC/PB REC/PB PIN NO PIN NO 12.6 12.6 9. IC606 (MN1380L) MODE REC/PB PIN NO...
  • Page 51 10. IC605 (4013B) MODE MODE REC/PB REC/PB PIN NO PIN NO 11. IC601 NAME ASSIGNMENT ACTIVE NAME ASSIGNMENT ACTIVE CTL/TEST CONTROL PULSE TEST PORT PULSE TRICK/H TRICK/HIGH HIGH VS/SHARP E.E. : VS TUNING, PULSE REC (L) REC : LOW PLAYBACK : SHARPNESS SP (H) SP : HIGH HIGH...
  • Page 52 NAME ASSIGNMENT ACTIVE NAME ASSIGNMENT ACTIVE Xcout 32.768KHz OSC OUT CLAMPR REFERENCE TO CTL CIRCUIT TV/LINE TV/LINE : PORT CTLAMPout REFERENCE TO CTL CIRCUIT LM/ON LOADING MOTOR ON HIGH AMPC REFERENCE TO CTL CIRCUIT LM F/R LOADING MOTOR FWD/RVS CTLAMPin REFERENCE TO CTL CIRCUIT CST/DOWN CASSETTE DOWN OUT...
  • Page 53 6-2. TR VOLTAGE (SP MODE) 1. PIF & INPUT SELECTOR 2. AUDIO * TV mode, ( ) Line mode * PB mode, ( ) REC mode Port Port Emitter Colletor Base Emitter Colletor Base Tr No. Tr No. Q151 0 (0) 0.1 (12.1) 5.0 (0) Q201...

  • Page 54: Block Diagram

    BLOCK DIAGRAM SECTION 4. 4-1. Y.C./HEAD AMP/AUDIO/INPUT SELECTOR BLOCK DIAGRAM 4-2. SYSCON/LOGIC BLOCK DIAGRAM 4-3. PIF/OSD BLOCK DIAGRAM CIRCUIT DIAGRAM SECTION 5. 5-1. CONNECTION DIAGRAM CIRCUIT 5-2. POWER CIRCUIT (SMPS) 5-3. SYSCON CIRCUIT 5-4. LOGIC CIRCUIT 5-5. LOGIC CIRCUIT (DV-F54/F34N) 5-6.
  • Page 55 Part Code Part Name Q'ty Description Remark SET TOTAL AS 97P4803100 POLY BAG FOR SET P.E FOAM 97P4916600 PAD TOP/BOTTOM 97P5031900 BOX CARTON EX300 X SCP150X EX300 MANUAL OWNERS ART PAPER 97P8804212 CABLE CONNECTOR HP-504 (PAL-TYPE) BATTERY 97P0424100 COVER ACCESSORY LD-PE T0.1 REMOCON HANDSET AS Part Code...
  • Page 56 Part Code Part Name Q'ty Description Remark 97P0608400 CHASSIS MAIN ABS (HB) 97PC146300 PANEL FRONT AS PCB LOGIC AS PCB MAINAS 97PB0348D- DECK TOTAL AS 97P0455700 COVER TOP SECC T0.6+PVC T0.15 97P0455800 COVER BOTTOM SECC T0.4 97P2440200 BRKT F/L SECC T1.6 97P2440300 BRKT EARTH TMI SECC T0.8...

  • Page 57: Standard Part Number Coding

    ELECTRICAL PARTS LIST SECTION 9. 9-1. STANDARD PART NUMBER CODING 9-1-1. RESISTOR CODING 1. Fixed Resistor Coding Tolerance Type of Resistor Type of Resistor Distance Value Example Symbol Tolerance Composition Resistor Code Wattage Code Distance Carbon Resistor 478 ....0.47Ω ±1% –A 1/6W 2.5 mm...
  • Page 58 9-1-2. CAPACITOR CODING 1. Normal Value Distance Type Distance (Same as Fixed (Same As (Same as Fixed Code Type Code Voltage Resistor) Fixed Resistor) Resistor) Aluminum 6.3V Barrier Layer Shape Ceramic Electrolytic Characteristic Line Across Mylar Styrol Metalized Polyester Mica 100V Tantal 125V...
  • Page 59 9-2. ELECTRICAL PARTS LIST ƒNUSE 4 HEAD ONLY ¡ USE 2 HEAD ONLY ¡ª USE DV-F44N/X, F24N/X 9-2-1. PCB MAIN AS REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION CS01 HCLK300JCA C CHIP CERA SL 50V 30PF J 2012 C210 CMXM2A562J...
  • Page 60 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C325 CEXE1H100A C ELECTRO RS 50V 10MF (5X11) TP C506 CEXF1A470A C ELECTRO RSM 10V 47MF 6.3X7 C326 HCLK120JCA C CHIP CERA SL 50V 12PF J 2012 C507 CEXF1A470A C ELECTRO...
  • Page 61 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C803 CH1BEB221K C CERA AC U/C/V 2.5KV SCB2G221K10BS D606 DS1R481T-- LED IR SIR-48IT C804 CH1BEE332M C CERA AC U/C/V 2.5KV SCE2G332M16BS D606A 97P2334200 HOLDER LED C805 CH1BEE332M C CERA AC U/C/V 2.5KV SCE2G332M16BS...
  • Page 62 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION IC301 1LA7184--- IC VIDEO LA7184 (VIDEO 1 CHIP) Q156 TZSR1004-- KSR1004 (AUTO) IC303 1LC7975--- IC VIDEO LC7975 (1HCCD) Q201 TZTC3202Y- KTC3202Y (AUTO) (1959Y) IC601 168KF4EATS IC MICOM 168KF4EATS Q202 TZTA1273Y-...
  • Page 63 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION RS08 RD-AZ912J- R CARBON FILM 1/6 9.1K OHM J R221 HRFT331JCA R CHIP 1/10 330 OHM J 2012 R150 HRFT750JCA R CHIP 1/10 75 OHM J 2012 R222 RD-AZ243J- R CARBON FILM...
  • Page 64 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION R339 HRFT431JCA R CHIP 1/10 430 OHM J 2012 R507 HRFT472JCA R CHIP 1/10 4.7K OHM J 2012 R340 HRFT751JCA R CHIP 1/10 750 OHM J 2012 R508 RD-AZ182G- R CARBON FILM...
  • Page 65 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION R817 RD-AZ682J- R CARBON FILM 1/6 6.8K OHM J R631 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R818 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R632 RD-AZ302J- R CARBON FILM...
  • Page 66 § ADD DV-F54N/F34N ONLY § DELETE DV-F54N/F34N ONLY 9-2-2. PCB LOGIC AS REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION C701 CCXF1H103Z C CERA 50V F0.01MF Z (TAPPING § P702 97P6269100 CONN WAFER 00-8283-0712-00000 C702 CEXF1A470A C ELECTRO...
  • Page 67 REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION CA18 HCFK103ZCA C CHIP CERA Y5V 50V 0.01MF Z 2012 PA03 4859241920 CONN WAFER YEAW025-08 HCBK103KCA C CHIP CERA X7R 50V 0.01MF K 2012 QA02 TZTC3198Y- KTC3198Y-(1815Y) (AUTO) CA19 HCLK221JCA...
  • Page 68 9-2-4. PCB SHUTTLE AS (DV-F54/F34N ONLY) REF. PART CODE PART NAME PART DESCRIPTION REF. PART CODE PART NAME PART DESCRIPTION P703 97P8810714 CONN AS (Y10714) 2.0 7P 140MM S751 5S10000002 SW JOG SHUTTLE SRGPJJ-A3 P704 97P6291825 CONN HOUSING 00-8370-047-000-800...

This manual is also suitable for:

Dv-f54/34nDv-f44/24n/xDv-f48/28n

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