Aiwa VX-D1420K Service Manual
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Aiwa VX-D1420K Service Manual

Aiwa VX-D1420K Service Manual

Basic tape mechanism : ovd-6s
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SERVICE MANUAL
INTEGRATED COLOR TV / VIDEO CASSETTE
RECORDER
POWER REQUIREMENTS ............
POWER CONSUMPTION ..............
WEIGHT .........................................
DIMENSIONS .................................
PICTURE TUBE .............................
TUNER SYSTEM ...........................
CHANNEL COVERAGE .................
TV SYSTEM ...................................
HORIZONTAL RESOLUTION .......
OPERATING TEMPERATURE ......
VIDEO RECORDING SYSTEM .....
VIDEO SIGNAL SYSTEM ..............
VIDEO HEAD .................................
USABLE CASSETTES ...................
SPECIFICATIONS
230V AC, 50Hz
60W
Standby 6W
Approx.12.8 kg (28.16 lbs.)
435 mm (W) x 370.5 mm (D) x
384.5 mm (H)
(17 1/4 x 14 5/8 x 15 1/4 in.)
14 in. (34 cm "V"), 90 degree
deflection
Frequency synthesized tuners
UHF: 21 to 69
I
240 lines
5°C to 40°C
Rotary 2 head helical scanning system
PAL colour signal, 625 lines, 50 fields
Azimuth 2 heads
VHS video cassettes
S/M Code No. 09-005-345-2N1
VX-D1420
BASIC TAPE MECHANISM : OVD-6S
TAPE SPEED ...................................
RECORDING/PLAYBACK TIME .....
VIDEO INPUT ...................................
VIDEO OUTPUT ..............................
VIDEO S/N .......................................
AUDIO INPUT ..................................
AUDIO OUTPUT ..............................
AUDIO TRACK .................................
•
Design and specifications are subject to change without
notice.
K
PAL
SP: 23.39 mm/sec.
LP: 11.69 mm/sec.
NTSC (playback SP only)
33.35 mm/sec.
PAL
SP: 5 hours max.
with E-300 tape
LP: 10 hours max.
with E-300 tape
NTSC (playback SP only)
3 hours 30 minutes max.
with T-210 tape
1.0Vp-p, 75 ohm, unbalanced
1.0Vp-p, 75 ohm, unbalanced
53dB (nominal)
SCART: –3.8 dBs, 50K ohm
RCA: –3.8 dBs, 50K ohm
SCART: –3.8 dBs less than 1K ohm
1 track (mono)

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Summary of Contents for Aiwa VX-D1420K

  • Page 1 VX-D1420 SERVICE MANUAL INTEGRATED COLOR TV / VIDEO CASSETTE BASIC TAPE MECHANISM : OVD-6S RECORDER SPECIFICATIONS POWER REQUIREMENTS .... 230V AC, 50Hz TAPE SPEED ........POWER CONSUMPTION ....SP: 23.39 mm/sec. Standby 6W LP: 11.69 mm/sec. WEIGHT ......... Approx.12.8 kg (28.16 lbs.) NTSC (playback SP only) DIMENSIONS .........

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SPECIFICATIONS ................................COVER TABLE OF CONTENTS ..............................A1-1 SERVICING NOTICES ON CHECKING ..........................A2-1 DISASSEMBLY INSTRUCTIONS REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS ................... B1-1, B1-2 REMOVAL OF DECK PARTS ............................B2-1~B2-5 REMOVAL OF ANODE CAP ............................B3-1 KEY TO ABBREVIATIONS ..............................

  • Page 3: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, they are Safety is secured against an X-ray by considering about indicated with the labels or seals on the cabinet, chassis the cathode-ray tube and the high voltage and parts.

  • Page 4: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS 1-3: TV/VCR BLOCK (Refer to Fig. 1-3) Remove the 2 screws 1. AND P.C. BOARDS Disconnect the following connectors: 1-1: BACK CABINET (Refer to Fig. 1-1) (CP351, CP755, CP354, CP401, CP501 and CP502). Remove the 2 screws 1.
  • Page 5 DISASSEMBLY INSTRUCTIONS 1-5: DECK SHIELD PLATE (Refer to Fig. 1-5) Remove the 2 screws 1. Remove the 4 screws 2. Remove the screw 3. Remove the Deck Shield Plate in the direction of arrow (A). Remove the screw 4. Remove the Shield Plate Bottom in the direction of arrow (B). Deck Chassis Deck Shield Plate Syscon PCB...

  • Page 6: Removal Of Deck Parts

    DISASSEMBLY INSTRUCTIONS 2. REMOVAL OF DECK PARTS NOTE When you install the Tape Guide L, install as shown in the 2-1: TOP BRACKET (Refer to Fig. 2-1) circle of Fig. 2-3-B. (Refer to Fig. 2-3-B) Remove the 2 screws 1. Slide the 2 supports 2 and remove the Top Bracket.
  • Page 7 DISASSEMBLY INSTRUCTIONS 2-9: TENSION ASS'Y (Refer to Fig. 2-9-A) 2-6: LINK ASS'Y (Refer to Fig. 2-6) Set the Link Ass'y to the Eject position. Move the Inclined S Ass'y to the back side. Remove the (A) side of the Link Ass'y first, then remove Remove the Tension Spring.
  • Page 8 DISASSEMBLY INSTRUCTIONS 2-11: S REEL/T REEL (Refer to Fig. 2-11) NOTE Remove the S Reel and T Reel. Do not touch the Pinch Roller. (Use gloves.) Remove the 2 Polyslider Washers 1. When you install the Pinch Roller Block, install as shown in the circle of Fig.
  • Page 9 DISASSEMBLY INSTRUCTIONS 2-15: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-15) Middle Gear Unlock the support 1 and remove the AHC Ass'y. E-Ring Remove the 3 screws 2. Remove the Cylinder Unit Ass'y. Main Cam NOTE Pinch Roller Cam When you install the Cylinder Unit Ass'y, tighten the screws from (1) to (3) in order while pulling the Ass'y Joint Gear toward the left front direction.
  • Page 10 DISASSEMBLY INSTRUCTIONS 2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 2. When you install the Clutch Actuator, install as shown in the circle of Fig. 2-19-C. (Refer to Fig. 2-19-C) Remove the E-Ring 1 and remove the Main Loading Gear.

  • Page 11: Removal Of Anode Cap

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 3. REMOVAL OF ANODE CAP remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.

  • Page 12: Key To Abbreviations

    KEY TO ABBREVIATIONS Audio/Control H.SW Head Switch Automatic Color Control Hertz Audio Erase Integrated Circuit Automatic Frequency Control Intermediate Frequency Automatic Fine Tuning Indicator AFT DET Automatic Fine Tuning Detect Inverter Automatic Gain Control Killer Amplifier Left Antenna Light Emitting Diode A.PB Audio Playback LIMIT AMP...
  • Page 13 KEY TO ABBREVIATIONS SYNC Synchronization SYNC SEP Sync Separator, Separation Transistor TRAC Tracking TRICK PB Trick Playback Test Point UNREG Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display V.PB Video Playback Variable Resistor V.REC Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source...

  • Page 14: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, Unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key for more than 2 seconds.

  • Page 15: Preventive Checks And Service Intervals

    PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. Time 1,000 1,500...
  • Page 16 PREVENTIVE CHECKS AND SERVICE INTERVALS CLEANING NOTE 2. TAPE RUNNING SYSTEM After cleaning the heads with isopropyl alcohol, do not When cleaning the tape transport system, use the run a tape until the heads dry completely. If the heads gauze moistened with isopropyl alcohol. are not completely dry and alcohol gets on the tape, 3.

  • Page 17: Note For The Replacing Of Memory Ic

    NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. NOTES: •...

  • Page 18: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS (For 2 head 1 speed model, (For 2 head 2 speed model) JG002B Adapter JG005 Post Adjustment 4 head model) VHS Alignment Tape JG002E Dial Torque Gauge Screwdriver VHS Alignment Tape JG001C (TTV-P2) (10~90gf•cm) Part No. SV-TG0-030-000 JG001E (TTV-P2) JG001D...

  • Page 19: Preparation For Servicing

    PREPARATION FOR SERVICING How to use the Servicing Fixture Unplug the connector CP351, CP755 and CP354 then remove the TV/VCR Block from the set. Unplug the connector CP810, CP820 and CP850, then remove the Main PCB from the VCR Block. Connect as shown in the below figure using the Service Fixture.
  • Page 20 PREPARATION FOR SERVICING Servicing Position for Main PCB (In case of needing to check on Main PCB) • It's possible to get the Servicing Position without the extension Jig if you arrange the unit as shown below. (But L503 connection can not be done, Degauss circuit will not operate.) L503 (2 Pin) VHS Tape Main PCB...

  • Page 21: Vcr Test Tape Interchangeability Table

    VCR TEST TAPE INTERCHANGEABILITY TABLE There are two types of the new alignment tape CH-1B (for NTSC) and CH-2 (for PAL). On each tape four signals (1) - (4) are recorded for the times and in the order shown below. (1) : 8min.

  • Page 22: Mechanical Adjustments

    MECHANICAL ADJUSTMENTS 1. CONFIRMATION AND ADJUSTMENT 1-2: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION Read the following NOTES before starting work. Set to the PLAY mode. • Place an object which weighs between 450g~500g on Adjust the Tension Adjust until the edge of the Tension the Cassette Tape to keep it steady when you want to Arm is positioning within 0.5mm range from the make the tape run without the Cassette Holder.

  • Page 23: Confirmation And Adjustment Of Tape Running Mechanism

    MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE 2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM Operate within 4~5 seconds after the reel disk begins to turn. Tape Running Mechanism is adjusted precisely at the Install the Torque Gauge (JG002F) and Adapter (JG002B) factory.
  • Page 24 MECHANICAL ADJUSTMENTS 2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ 2-3: TAPE RUNNING ADJUSTMENT CONTROL HEAD (X VALUE ADJUSTMENT) When the Tape Running Mechanism does not work well, Confirm and adjust the height of the Reel Disk. adjust the following items. (Refer to item 1-1) Confirm and adjust the position of the Tension Post.

  • Page 25: Mechanism Adjustment Parts Location Guide

    MECHANICAL ADJUSTMENTS 3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 1. Tension Adjust X value adjustment driver hole 2. Tension Arm P4 Post 3. Guide Roller T Brake Spring 4. P1 Post T Reel 5. Audio/Control Head S Reel D1-4...

  • Page 26: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE Read and perform these adjustments when repairing the CH-2 circuits or replacing electrical parts or PCB assemblies. CAUTION When replacing IC's or transistors, use only specified 6.5H silicon grease (YG6260M). CH-1 (To prevent the damage to IC's and transistors.) Fig.
  • Page 27 ELECTRICAL ADJUSTMENTS 2-6: WHITE BALANCE 2-3: RF AGC DELAY (MONITOR TUNER) NOTE: Adjust after performing CUT OFF adjustment. Receive the UHF (80dB). Place the set with Aging Test for more than 15 minutes. Connect the digital voltmeter between the pin 5 of Receive the white 100% signal from the Pattern CP603 and the pin 1 (GND) of CP603.
  • Page 28 ELECTRICAL ADJUSTMENTS 2-11: VERTICAL POSITION 1. H.POSI 50/60 NOTE: Adjust after performing adjustments in section 2-10. Receive the center cross signal from the Pattern 3. V.SIZE 50/60 Generator. 4. V.POSI 50/60 Using the remote control, set the brightness and 5. V.LIN 50/60 contrast to normal position.
  • Page 29 ELECTRICAL ADJUSTMENTS 2-15: SUB CONTRAST 1. BRIGHT Activate the adjustment mode display of Fig. 1-1 and 2. CONTRAST press the channel button (4) on the remote control to 3. COLOR select "PICTURE". The Fig. 2-6 appears on the display. 4. TINT Press the channel button (2) on the remote control to 5.

  • Page 30: Electrical Adjustment Parts Location Guide

    ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP1001 C1003 TP4002 TP4001 TU601 TP602 TP601 TU602 TP4501 J4501 CP603 SYSCON PCB L6006 IC6001 CP6001 IF PCB D2-5...
  • Page 31 ELECTRICAL ADJUSTMENTS (TV SECTION) J801 TP801 CRT PCB VR502 TP401 T501 FOCUS VOLUME FB401 SCREEN VOLUME MAIN PCB D2-6...

  • Page 32: Purity And Convergence Adjustments

    ELECTRICAL ADJUSTMENTS 4-3: STATIC CONVERGENCE 4. PURITY AND CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 4-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.
  • Page 33 TROUBLESHOOTING GUIDE (Television division) (In case that there isn't a normal tension for time to do ( 1 ) that a power supply doesn't stanby CD810 every terminal) enter Is there output on the Voltage of C507 is Investigate R501 and F501. secondary of T501 it normal? dimensions or not?
  • Page 34 TROUBLESHOOTING GUIDE (In case that there is a normal tension for time to do ( 2 ) that a power supply doesn't stanby CD810 every terminal) enter Is the voltage 5V for Investigate D1006 and D1010. IC1006 10th pin or not? Is the voltage of IC1006 Investigate D1018.
  • Page 35 TROUBLESHOOTING GUIDE A voice isn't though an image appears Whether does a signal Whether does a signal Investigate IC4001 11th pin. come to IC352 6th pin come to IC701 1st pin or not? or not? Investigate IC701 peripheral circui. Does a signal change at Investigate IC1006 28th pin.
  • Page 36 TROUBLESHOOTING GUIDE A color doesn't adhere to it Whether is wave form of Investigate X604. IC602 14th pin normal or not? Whether is wave form of Whether is wave form of IC602 10th pin,11th pin and Investigate IC851 and IC853. IC851 3rd pin normal or 12th pin normal or not? not?
  • Page 37 TROUBLESHOOTING GUIDE An image doesn't appear Is the voltage DC 5V for Investigate P.CON 5V line. IC602 48th pin or not? Whether is a luminance signal early in IC602 Investigate IC602. 34th pin or not? Whether is a luminance Investigate IC4001. signal early in IC4001 52th pin or not? R, G, B signal out from...
  • Page 38 TROUBLESHOOTING GUIDE An only horizontal line appears Investigate C429,D411 and Is the voltage DC 25V for R452. IC401 6th pin or not? Investigate CRT, IC401 and a Is the voltage DC 12V for peripheral circuit. IC401 2nd pin or not? Whether does a vertical Investigate IC602.
  • Page 39 TROUBLESHOOTING GUIDE (VCR SECTION) PLAY SHUTS OFF Insert a cassette and push PLAY button. Does Playback change to Check TAPE LOADING, CAPSTAN Stop about 3 seconds DD UNIT and CYLINDER UNIT. later? Does Playback Check REEL SENSOR and change to Stop about CAPSTAN BELT.
  • Page 40 TROUBLESHOOTING GUIDE NO PLAYBACK PICTURE Is there voltage at pins Does E-E appear on the Check Power circuit. 12, 36 and 61of IC4001 5V? Monitor TV? Is there PB Y/C signal Check IC4001 and the connection of at TP4002 ? the CYLINDER.
  • Page 41 TROUBLESHOOTING GUIDE NO COLOR DURING PLAYBACK Does FM ENVELOPE Check IC4001. appear at TP4002? Check R4040, Q4006 and Does CHROMA signal peripheral circuit. appear at pin 52 of IC4001? Does CHROMA Check C4075, R4050 and the signal appear at pins peripheral circuit.
  • Page 42 TROUBLESHOOTING GUIDE PLAYBACK PICTURE IS NOISY (EVEN AFTER CLEANING HEADS) Is FM signal at TP4002 Replace CYLINDER UNIT. more than 200mVp-p? Is VIDEO waveform at pin Check pin 52 of IC4001 and 52 of IC4001 1Vp-p and peripheral circuit. are there any noise? Check pins 79 and 78 and Is there FM signal at pin 79 peripheral circuit.
  • Page 43 TROUBLESHOOTING GUIDE NO COLOR DURING SELF RECORDING AND PLAYBACK Does VCR signal Check J4501, J701 and VIDEO appear at pin 31 or 30 or input circuit. 28 of IC4001? Refer to section "NO COLOR DURING PLAYBACK". E-11...
  • Page 44 TROUBLESHOOTING GUIDE NO NORMAL AUDIO IN PLAYBACK MODE Is sound heard on E-E ? Refer to section "NO E-E". Check AUDIO HEAD for debris of stains. Does Audio appear at Check that the connector from pin 11 of IC4001? AUDIO HEAD is fully inserted to CP4005.
  • Page 45 TROUBLESHOOTING GUIDE CAPSTAN DD MOTOR NOT ROTATING In playback, is the voltage at pin 5 of Check POWER circuit. CP1004 12V? Is the voltage at pin 8 of CP1004 5V? In playback, check the voltage at pin 3 of CP1004 is 2V or at Replace IC1006.
  • Page 46 TROUBLESHOOTING GUIDE AUDIO CAN NOT BE RECORDED Is there BIAS at pin 4 Is the voltage at pin 2 Check POWER BLOCK. of L4005 5V? of IC4001? L4005 is broken or shorted. Check peripheral circuit. Is there AUDIO signal at Check the circuit of 21 PIN and pins 7 or 8 or 9 of IC4001? TUNER.
  • Page 47 TROUBLESHOOTING GUIDE CASSETTE IN AND DOWN BUT UNIT HAS NO FUNCTIONS Does mode indicator Check LOADING MOTOR and the appear in Display? peripheral parts. Does VCR operate with Check IC1006. the remote control? Check CONTROL PCB. E-15...
  • Page 48 TROUBLESHOOTING GUIDE RECORDING MECHANISM WORKS, BUT NO VIDEO RECORDED FROM INPUT JACK OR TUNER Does video signal Check the circuit from VIDEO input appear at pin 28 or jack to IC4001 and from Tuner Pack 30 or 31 of IC4001? to IC4001.
  • Page 49 TROUBLESHOOTING GUIDE NO E-E (NO VIDEO AND AUDIO FROM TUNER) Is the voltage at pin Check Power PCB. 7 of TU601 5V? Is the voltage at pin 9 of TU601 30V? Is there waveform at pins Check IC601. 4 and 5 of TU601? Check TU601.
  • Page 50 TROUBLESHOOTING GUIDE CYLINDER NOT ROTATING DURING PLAYBACK AND RECORDING Check P. CON 12V line and Is the voltage at pin 2 of POWER BLOCK. CP1005 about DC12V? In playback, is the voltage at pin 5 of CP1005 about Check IC1006. DC1.2V? Check CYLINDER MOTOR.
  • Page 51 TROUBLESHOOTING GUIDE AUDIO SHAKES Replace AUDIO HEAD. Is AUDIO HEAD scratched? Does pin 8 of IC1006 output a 3.0Vp-p square Replace CAPSTAN DD MOTOR. wave? In playback, is the voltage Check peripheral components at pin 4 of CP1004 2.8V? of IC1006. Check AUDIO BLOCK.
  • Page 52 TROUBLESHOOTING GUIDE CASSETTE TAPE IS NOT ACCEPTED Does WORM GEAR of Check WORM GEAR of CASSETTE LOADING CASSETTE LOADING BLOCK. BLOCK activate? When cassette is not inserted ,is EOT BOT Check EOT, BOT, PHOTO PULSE at pin 2 of CP1006 SENSOR, pins 17 and 18 of IC1006.
  • Page 53 TROUBLESHOOTING GUIDE WHEN INSERTING CASSETTE, IT EJECTS IMMEDIATELY Does this same problem Defective CASSETTE or appear when using CASSETTE LOADING BLOCK. another cassette tape? When inserting a cassette, Replace EOT PHOTO does Emitter of EOT return TRANSISTORS. to LOW? Is pin 17 of IC1006 LOW? Check R1026 circuit.
  • Page 54 TROUBLESHOOTING GUIDE FF/REW DO NOT WORK When the FF/REW is pushed, Check pin 72 of IC1006 lines. does the PULSE appear at Replace IC1006. pin 72 of IC1006? Is the voltage change at Check pin 7 of CP1004 and pin 7 of CP1004 when peripheal circuit.
  • Page 55 TROUBLESHOOTING GUIDE TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY Is the voltage at pin 2 of Check Power circuit. Does CYLINDER rotate ? CP1005, UNREG 12V? Replace CYLINDER UNIT. Does TP4001 feed Does PG PULSE HEAD SWITCHING appear at pin 107 of PULSE signal 30Hz? IC1006? Replace IC1006.
  • Page 56 TROUBLESHOOTING GUIDE PLAYBACK PICTURE JITTERS VERTICALLY Does tracking noise appear in the picture? By adjusting the manual tracking UP/DOWN Check P/B ENVELOPE. buttons, will the noise disappear in the picture? Are GUIDE POSTS Adjust GUIDE POST height. the right height? Is PG SHIFTER Adjust PG SHIFTER.
  • Page 57 TROUBLESHOOTING GUIDE PLAYBACK PICTURE JITTERS HORIZONTALLY Is FG output level at pin Replace CYLINDER UNIT. 3 of CP1005 5Vp-p? Is the voltage at pin 5 of Replace IC1006. CP1005 1.2V? Replace CYLINDER UNIT. AUTO TRACKING DOES NOT OPERATE By manual tracking, does Check YCA, H/AMP circuit and the DC level at pin 19 of CYLINDER UNIT.
  • Page 58 TROUBLESHOOTING GUIDE WHEN PLAYBACK, FAST FORWARD OR REWIND MODE IS ACTIVATED, UNIT STOPS IMMEDIATELY Refer to section "CAPSTAN DD Does CAPSTAN DD MOTOR NOT ROTATING". MOTOR rotate? Is CAPSTAN BELT normal? Replace CAPSTAN BELT. Does REEL SENSOR PULSE Check Reel Sensor of Q1001 and signal appear at pin 32 of R1006.
  • Page 59 TROUBLESHOOTING GUIDE PLAYBACK PICTURE SHAKES Is FG Pulse output Replace CYLINDER MOTOR. level at pin 3 of CP1005 about 5Vp-p? Does pin 108 of IC1006 output Replace IC1006. a 5Vp-p square wave? In playback, is the voltage at pin 5 of CP1005 about 1.2V? Replace CYLINDER MOTOR.

  • Page 60: Ic Descriptions

    IC DESCRIPTIONS OEC0085B (IC1006) PORT PIN NAME DESCRIPTION CTL(+) CTL(+) I/O Input and output terminal of Control Head. SVSS SVSS — Ground. CTL(-) CTL(-) I/O Input terminal of Control Head. CTLBIAS CTLBIAS IN Input terminal for Control Bias. CTLFB CTLFB IN Input terminal for Control Feedback.
  • Page 61 IC DESCRIPTIONS OEC0085B (IC1006) PORT PIN NAME DESCRIPTION — Ground. DA RGB SW OUT Output sigmal to cut of RGB sync — AT +5V. IN Input terminal of DATA FZTAT input. SOD DATA OUT Output terminal of DATA FZTAT output. SCK1 DEC TU SW OUT Output terminal of DATA for 2-tuner control.
  • Page 62 IC DESCRIPTIONS OEC0085B (IC1006) PORT PIN NAME DESCRIPTION V.REC.START-H OUT Output terminal for REC signal when record. PAL/SECAM IN Input terminal from secam_chroma_ic for SECAM or NOT OUT Output terminal for control AV_SW_IC(TUNER,AV1,AV2) OTPB LED OUT Output terminal control for OTPB-LED voltage drive. SERVICE IN Input terminal for Service Mode.

  • Page 63: Servo Timing Chart

    SERVO TIMING CHART IC1006 (OEC0085B) DPG 107 PIN DFG 108 PIN CH 1 H. SW. P 100 PIN CH 2 V-SYNC (E-E) 98 PIN REC CTL (REC) 6 PIN V-SYNC (TRICK PB) 110 PIN • WAVEFORM CHANGES DEPENDED ON THE TAPE SPEED F2-1...

  • Page 64: System Switch Mode

    SYSTEM SWITCH MODE SLOW : SETTING SPEED TO SERVO : CAPSTAN FWD ROTATING LOADING DIRECTION DIRECTION : MECHANICAL MOVEMENT AND CAPSTAN ROTATING (FWD) : CAPSTAN RVS ROTATING : MECHANICAL MOVEMENT (NO CAPSTAN ROTATING) DIRECTION EJECTION UNLOADING STP3 R. SLOW F. SLOW PB/STP STP2 FF/REW...
  • Page 65 SEMICONDUCTOR BASE CONNECTIONS DIODE CATHODE CATHODE ANODE ANODE 1SS133T-77 11E1N-TA1B2 10ELS2N-TA1B2 SID1050CM EM-553-F1T MTZJ12B T-77 11EQS04N-TA1B2 21DQ09N-TA2B1 EQ-552-F1T MTZJ13B T-77 11ES1N-TA1B2 EG-01C MTZJ33B T-77 1N4005E-6580-G23 EG01Z-V0 MTZJ5.6B T-77 GP15M-G23 RMPG06J-G3 MTZJ6.8B T-77 RD12FB-T7 RU2AM V1 SB10-03A3 RU2YX-V1 16PIN 20PIN 24PIN 100PIN 8PIN 24PIN...

  • Page 66: Semiconductor Base Connections

    SEMICONDUCTOR BASE CONNECTIONS TRANSISTOR SG-260 2SA1371(D,E)-AE 2SA933STP(R,S) 2SC4160-OEC-YAC1 2SC4217(D,E)-RAC 2SA1037AKT146R,S 2SA608KF-NP-AA DTC114TSTP 2SC2412KT146 R,S 2SA733(C)-T(P,Q) DTC114EKT147 2SB892(S,T)-AE 2SC1815Y(TPE2) 2SC2271(D,E)-AE 2SC2274-AA 2SC2909(S,T)-AA 2SC3000-AA 2SC945(C)-T(P,Q) 2SD734(E,F)-AA 2SD2599 DTA124EKAT146 DTC114ESTP RPI-352Q01R DTC114EKAT146 DTC124EKAT146 DTC143EKAT146 DTC144EKAT146...

  • Page 67: Micon/Operation

    TV BLOCK DIAGRAM V. OUTPUT IC401 LA7840 THERMAL RECORD LUMINANCE SIGNAL PROTECTION PLAYBACK LUMINANCE SIGNAL PUMP RECORD COLOR SIGNAL PLAYBACK COLOR SIGNAL TUNER VIDEO SIGNAL AUDIO SIGNAL(REC) AUDIO SIGNAL (PB) CHROMA IC602 Q405 Q406 DEFLECTION SIGNAL NN5099 TUNER AUDIO SIGNAL H.
  • Page 68 Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM VPS/PDC IC4002 LC74793/JM SYNC IN X'tal IN Q4006 BUFFER Y/C/AUDIO/CCD/H.AMP X4001 IC4001 4.433619MHz HA118217F SYNC CP4001 6dB AMP 6dB AMP SP-CH2 (L) 2MLPF CTL TRAP CYL. SP COM fh HPF CLEAR C SQUELCH SP-CH1 (R) SYNC DELAY CLPF N-->P...
  • Page 69 MICON/OPERATION BLOCK DIAGRAM SW1001 SYSCON/TIMER/SERVO IC1006 OEC0085B SYSTEM RESET IC1002 RESET 3 OUT TAB SW RE5VS31A POWER FAIL POWER_FAIL (DC) AT+5.6V MS SEN-A EXT_IN_L EXT_IN_L MS_SEN A Q1009 IF/21PIN/ DEC_TU_SW DEC_TU_SW AT+5.6V IN/OUT/ AV_1 POWER MS SEN-B AV_2 Q1019 MS_SEN B Q1003 P.
  • Page 70 IF/21PIN/IN/OUT/POWER BLOCK DIAGRAM IC6001 LA7567B TU602 DEC_TU_SW MICON/ OPERATION RECORD LUMINANCE SIGNAL CP6001 PLAYBACK LUMINANCE SIGNAL RECORD COLOR SIGNAL CF6002 PLAYBACK COLOR SIGNAL TU AUDIO REC_TU_AU1 Y/C/AUDIO/ TUNER VIDEO SIGNAL HEAD AMP TU VIDEO REC_TU_V AUDIO SIGNAL(REC) TU_AUDIO Q6005 AUDIO SIGNAL (PB) TU_VIDEO TUNER AUDIO SIGNAL PRE AMP...
  • Page 71 T'TEXT BLOCK DIAGRAM MONITOR_V D860 Q863 21_B P.CON+5V_D V.REF IF/21PIN/ D858 IN/OUT 21_R /POWER D855 21_G D852 D857 21_Y D859 TRIPLE ANALOG MPXER IC853 D856 TC74HC4053AP DECODER DATA SLICER IC851 ET106 IC852 Q855 ET317 BUFFER VIDEO TSIG SSIG Q852 CSIG GREEN GREEN TDATA...

  • Page 72: Printed Circuit Boards (Operation/Deck

    PRINTED CIRCUIT BOARDS OPERATION W814 R763 W004 C351 C353 C751 CD351_2 B702 CD750_2 R772 R351 D791 W806 SW750 SW794 SW797 SW796 R771 D797 OS753 W002 R766 R762 SW793 D796 D793 W807 C355 W812 C702 R761 R754 W818 W809 R773 R350 B701 C781 DECK...

  • Page 73: Operation Schematic Diagram

    OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) FROM/TO 21PIN I/O (CP755) CD750_2 CH2A014A REMOCON OUT AT+5V POWER ON L OTPB/PLAY LED L005 KEY A HF57T18.5*10*10 T-REC LED W818 REC LED KEY B ON TIMER LED R766 100 1/2W Vout R771 R772 R773 R774 OS753 1.5K...

  • Page 74: Deck Schematic Diagram

    DECK SCHEMATIC DIAGRAM LOADING MOTOR M101 (DECK PCB) S105 BOT SENSOR S106 Q101 RPT-38PB113 S101 S102 S103 S104 FROM/TO MICON CP101 (CP1006) 52044-0445 LDM+ LDM- FROM/TO MICON CP102 (CD1002) 173979-2 EOT SENSOR Q102 RPT-38PB113 PCB550 VE8851 CAUTION: SINCE THESE PARTS MARKED BY ATTENTION: LES PIECES REPAREES PAR UN ETANT...

  • Page 75: Printed Circuit Boards Syscon If

    PRINTED CIRCUIT BOARDS SYSCON TO SHIELD COVER H/AMP S812 C4201 C4079 C893 R4202 C604 W803 S820X Q861 C6023 C853 R6021 C6001 C866 C6007 Q351 R6002 R905 R6016 C6009 S819X R918 C4090 R1099 W845 C6010 R6020 Q852 Q855 R1097 Q851 W008 IC4002 C4103 R6014...
  • Page 76 PRINTED CIRCUIT BOARDS SYSCON C6029 W001 R6001_1 W821 C6002 CF6008 W003 C6003_1 CF6001 L6008 CF6007 L6001 W004 W005 C6004 IC6001 W009 C6014 CF6005...
  • Page 77 PRINTED CIRCUIT BOARDS SYSCON TO SHIELD COVER H/AMP S812 C4201 C4079 C6029 W001 C893 R4202 R6001_1 W803 C604 W821 S820X C6002 Q861 C6023 CF6008 C853 R6021 W003 C6001 C6003_1 CF6001 L6008 C866 C6007 Q351 CF6007 L6001 R6002 W004 R905 R6016 C6009 W005 S819X...

  • Page 78: Y/C/Audio/Head Amp Schematic Diagram

    Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) L4002 R4044 82 1/4W 100uH FROM/TO POWER 0305 Y/C_VIDEO_OUT Y/C_VIDEO_OUT R4040 Y/C_AUDIO_OUT REC_TU_AU1 BUFFER Q4006 2SA1037AK REC_TU_V V.ENV REAR_AU1 TP4002 JWF-50K-1 P.CON+9V P.CON+5V_B C4035 R4001 W867 Y/C_AUDIO_OUT 0.01 B FROM/TO CYL/MOTOR C4002 CP4001_1 C4010 Y/C/AUDIO/CCD/HEAD AMP TOC-C04X-B1 H.SW...

  • Page 79: Micon Schematic Diagram

    MICON SCHEMATIC DIAGRAM (SYSCON PCB) D1006 FROM/TO POWER D1010 SB10-03A3 AT+5.6V SB10-03A3 R1109 C1075 VCR_POWER_H 100P CH FROM/TO T’TEXT POWER_FAIL[DC] C1076 CAP_VCO C1030 100P AV_1 TEXT_RESET X1002 0.1 F X1001 AV_2 TUNER_ON/OFF 32.768 REC_AFT 10MHz R1034 REC_AGC_CTL FROM/TO Y/C/A/H.AMP SVL_R VV_H MO_SYNC 5.0 5.1 0.1...

  • Page 80: Chroma Schematic Diagram

    CHROMA SCHEMATIC DIAGRAM FROM/TO MICON TUNER_CTL VCR_POWER_H (SYSCON PCB) TV_POWER_H R.OUT G.OUT B.OUT TEXT_Y R648 D604 L613 11ES1N AGC_M W919 47uH IIC_OFF 0305 AFT_M R640 R638 100K BUFFER 6.8K TEST POINT Q613 2SC2412K CP603 8283_0912_00_000 B.OUT REC_AFT AFT-R SAW FILTER AGC_R CF601 AGC-R...

  • Page 81: 21Pin In/Out Schematic Diagram

    21PIN IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER DURING PLAYBACK FROM/TO MICON ON_TIM/PLAY_LED KEY_B FROM/TO SOUND AMP...

  • Page 82: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO Y/C/A/H.AMP REAR_AU1 P.CON+5V_B P.CON 5V DRIVER P.CON+5V DRIVER (REC TURNE) Q1019 Q1008 Y/C_VIDEO_OUT 2SB892 2SB892 D1021 Y/C_AUDIO_OUT P.CON+5V_D AT+6V 11EQS04N REC_TU_V P.CON+9V R1057 R1065 REC_TU_AU1 D1020 P.CON+5V_C FROM/TO MICON 11EQS04N R1104 P.CON SW MO_SYNC Q1007 2SC2412K AT+5.6V...

  • Page 83: Sound Amp Schematic Diagram

    SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) SOUND AMP IC352 AN7523 FROM CHROMA W813 SOUND+B FROM/TO 21PIN I/O C353 SOUND_GND SOUND_L+ 1000 FROM POWER SP_OUT_L R315_1 C356 W949 MONITOR_A 390 1/4W C354 W810 1000 W834 CD354_1 SPEAKER CP354 B2B-EH-A CH12434A SP351 SP OUT C368 810-47-171...

  • Page 84: T'text Schematic Diagram

    T’TEXT SCHEMATIC DIAGRAM (SYSCON PCB) FROM POWER S809X P.CON+9V S809Y W876 W905 BUFFER MONITOR_V Q861 2SC2412K TO CHROMA TEXT_SYNC FROM POWER S805X AT+6V C894 W878 S805Y P.CON+5V_B 16V KA W935 P.CON+5V_D V.REF Q863 2SC2412K R861 D855 1SS133 D858 SYNC BUFFER 1SS133 C857 Q853...

  • Page 85: If Schematic Diagram

    IF SCHEMATIC DIAGRAM (IF PCB) C6004 CF6005 TPS6.0MB C6005 CF6001 L6007 R6019 R6020 0.01 B SFSH6.0MCB-TF21 15uH L6006 360K042 C6028 100PCH VIDEO C6006 W806 W819 0.01 B L6001 C6007 L6003 BUFFER 68P CH 2.7uH Q6001 22uH 2SA608KF-NP C6019 R6004 0.01 B C6001 0.039 B C6015...

  • Page 86: Printed Circuit Boards (Main/Crt/Power Sw

    PRINTED CIRCUIT BOARDS MAIN/CRT/POWER SW CP820 W835 W047 W005 HS503 R423 C520_2 CP810 W012 C511_1 W822 S105Y W817 IC505 C537 W010 IC503 W846 IC504 D517 S105X W027 R504 S810Y W823 D519 R519 W816 C519 W825 R460 R520 C422_1 C438 C522 W021 ICP505 C516...

  • Page 87: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 LA7840 THERMAL PUMP UP PROTECTION 14.2 23.5 22.8 C412 TO DY CP401 500V 390P B05B-DVS C409 0.0022 M R404 R413 R416 FROM/TO CHROMA CP820 (CD820) 8283_1112_00_000 SOUND GND SOUND+B CC004 HS401 TP-1S-05 VCR.POWER H 763WSA0004 TV.POWER H...

  • Page 88: Tv Power Schematic Diagram

    TV POWER SCHEMATIC DIAGRAM (MAIN PCB) TV.POWER_H P.CON+125V 127.0 127.5 127.0 FROM/TO DEFLECTION +B 130V DRIVE Q503 6V POWER REG. IC P.CON+125V 2SC4160 130V DRIVE IC505 -OEC-YAC11 SOUND+B Q502 127.5 KIA7806PI D516 RELAY DRIVE 2SA1371 TV.POWER_H Q504 126.8 VCR.POWER_H 1SS133 2SC1815Y 127.0 10.5...

  • Page 89: Crt Schematic Diagram

    CRT SCHEMATIC DIAGRAM (MAIN PCB) 132.9 104.1 132.8 132.5 TP801 FROM CHROMA J801 R802 CP850 (CD850) HPS3200-010501 8283_0512_00_000 12K 2W CUT OFF 132.5 G.OUT R807 W845 W803 RED AMP R.OUT (W042) Q804 2.7K 1/4W B.OUT 2SC4217 R811 4.7K TP802 R805 12K 2W 132.1 W843...

  • Page 90: Interconnection Diagram

    INTERCONNECTION DIAGRAM J351 OPERATION OS753 TM101 PCB030 PCB350 TEXA19 VIDEO AUDIO L VE6778 J701 V.OUT HALL MAIN ROTOR SENSOR COIL MAGNET FG SENSOR HALL HALL SWITCH LOGIC CP1004 MOTOR GND SPEAKER CD354 CP354 I LIMIT SP OUT SP351 8OHM SOUND GND SPEAKER CAPSTAN DD UNIT CAP.M/F/R...

  • Page 91: Waveforms

    WAVEFORMS TV POWER 1 5.0V 0.1ms/div 50.0V 20µs/div 11 PB 2.0V 10ms/div DEFLECTION 2 2.0V 20µs/div 7 50.0V 20µs/div 12 PB 50mV 5ms/div DEFLECTION 3 0.5V 5ms/div 10.0V 5ms/div 13 REC 0.5V 10µs/div TV POWER 4 200mV 20µs/div 9 20.0V 0.1ms/div 14 REC 0.5V 10µs/div Y/C/AUDIO/HEAD AMP...
  • Page 92 WAVEFORMS MICON 16 REC 21 REC 27 REC 0.5V 10µs/div 1.0V 2ms/div 1.0V 20µs/div 17 REC 22 REC 28 REC 100mV 0.5ms/div 2.0V 10ms/div 2.0V 5ms/div 18 REC 23 REC 29 REC 0.5V 0.5ms/div 2.0V 1ms/div 0.5V 0.5ms/div 25 REC 30 REC 20.0V 2ms/div 1.0V 1µs/div...
  • Page 93 WAVEFORMS 32 REC 37 REC 43 REC 0.5V 0.5ms/div 0.5V 0.5ms/div 0.5V 10µs/div 47 REC 33 REC 38 REC 0.5V 10µs/div 0.5V 10µs/div 0.5V 10µs/div 48 REC 34 REC 39 REC 100mV 0.5ms/div 200mV 0.5ms/div 0.5V 0.5ms/div SOUND AMP CHROMA 49 REC 41 REC 35 REC...

  • Page 94: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 V801 FB401 PCB070 PCB340 (MAIN PCB) (POWER SW PCB) SP352 SW501 PCB030 (OPERATION PCB) SP351 K1-1...
  • Page 95 MECHANICAL EXPLODED VIEW PCB350 (IF PCB) TU602 ANT601 TU601 J4501 PCB010 (SYSCON PCB) K1-2...

  • Page 96: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY S5-540-3M7-200 CAB,FRONT ASS'Y ---- FELT SHEET ---- SHIELD,CASE HEAD AMP ASS'Y ---- FELT SHEET ---- PLATE,EARTH-SYSCON ---- FELT SHEET S3-5WP-D06-800 BUTTON,REC ---- FELT SHEET ---- HEAT SINK ----...

  • Page 97: Chassis Exploded View (Top View)

    CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5001 H5002 M101 PCB550 (DECK PCB ASS'Y) NOTE: Applying positions AA, AB, AC, AD and BA for CLASS PART NO. MARK the grease or oil are displayed for this section. GREASE G-555G Check if the correct grease or oil is applied for G-488M each position.

  • Page 98: Chassis Exploded View (Bottom View)

    CHASSIS EXPLODED VIEW (BOTTOM VIEW) M2001 NOTE: Applying positions AA, AB, AC, AD and BA for CLASS PART NO. MARK the grease or oil are displayed for this section. GREASE G-555G Check if the correct grease or oil is applied for each position.

  • Page 99: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY ---- DECK ASSY A55402N420A S5-OP9-006-860 TAPE GUIDE R S5-OP9-007-070 COVER,SENSOR L S5-OA5-000-220 AHC ASS'Y S5-OP9-006-880 LEVER,FLAP S5-OP2-002-900 BELT,CAPSTAN (S) S5-OP9-006-900 CASS HOLDER S5-OP9-007-100 LEVER,REC S5-OP6-005-400 DRIVER,WORM S5-OP5-000-830 BASE,AC HEAD S5-OP9-007-130 LOCKER,R2...

  • Page 100: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION SYSCON PCB ASS'Y *** CAPACITORS *** *** RESISTORS *** C4040 87-010-402-080 CAP,E 2.2-50V C4041 87-010-404-080 CAP,E 4.7-50V ! R1005 S6-150-12R-7J0 RES,FUSE 2.7-1W C4049 87-010-076-040 CAP,E 22UF-6.3V R4021 S4-X5T-622-3F0 RES,MF 22K-1/6W C4050 87-010-404-080...
  • Page 101 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** ICS *** *** COILS *** ! IC352 S0-FSP-752-300 IC,AN7523 B851 S2-4DT-035-810 CORE,BEADS LFP3A-M3R2TA IC602 S0-1DE-509-900 IC,NN5099 B4501 S2-4AC-360-1C0 CORE,BEADS BLM21A601SPT IC701 S0-6D0-247-200 IC,M52472P B4502 S2-4DT-035-810 CORE,BEADS LFP3A-M3R2TA IC851 SC-KD0-010-600 IC,ET106...
  • Page 102 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** OTHERS *** *** CAPACITORS *** CD810 S6-CH2-A01-7A0 CORD CONN CH2A017A C401 87-016-636-080 CAP,E 4.7-50V CD820 S6-CH2-B03-1A0 CORD CONN CH2B031A C403 87-010-560-080 CAP,E 10-50V CD850 S6-CH2-508-6A0 CORD CONN CH25086A C405 87-016-636-080 CAP,E 4.7-50V...
  • Page 103 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** ICS *** *** CAPACITORS *** ! IC401 87-A20-128-010 IC,LA7840 C801 S0-JBB-07H-3K0 CAP,CER 0.0022-2KV ! IC501 S2-BT0-670-700 IC,STR-F6707 C819 S0-JBB-07H-3K0 CAP,CER 0.0022-2KV ! IC502 S0-Q09-780-500 IC,NJM7805FD C820 S0-ELT-D4R-7M0 CAP,E 4.7-250V ! IC503 S0-GA9-09R-D00 IC,PQ09RD08 ! IC504...
  • Page 104 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION AND OTHERS *** COIL *** ! L503 S2-8F1-400-180 COIL,DEGAUSS 8F140018 *** TRANSFORMER *** ! FB401 S4-321-402-9F0 TRANS FLYBACK 3214029F *** OTHERS *** CD354 S6-CH1-243-4A0 CORD CONN CH12434A SP351 S7-0C5-330-080 SPEAKER,810-47-171 SP352 S7-0C5-330-080 SPEAKER,810-47-171 ! V801 S9-8P1-404-960...
  • Page 105 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 737004 Printed in Singapore...

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