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Aiwa VX-G143K Service Manual

Basic tape mechanism : ovd-6
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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
55W
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 tuner
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. 09-006-345-5N1
VX-G143
BASIC TAPE MECHANISM : OVD-6
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: 4 hours 20 minutes max.
with E-260 tape
LP: 8 hours 40 minutes max.
with E-260 tape
NTSC (playback SP only)
3 hours max. with T-180 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-G143K

  • Page 1 VX-G143 SERVICE MANUAL INTEGRATED COLOR TV / VIDEO CASSETTE BASIC TAPE MECHANISM : OVD-6 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, CP757, CP302, 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 NOTE 2. REMOVAL OF DECK PARTS 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. Unlock the support 1 and remove the S Reel Stopper. Remove the (A) side of the Link Ass'y first, then remove the (B) side.
  • Page 8 DISASSEMBLY INSTRUCTIONS 2-11: S REEL/T REEL ASS'Y (Refer to Fig. 2-11) NOTE Remove the Idler Ass'y. Do not touch the Pinch Roller. (Use gloves.) Remove the S Reel and T Reel Ass'y. When you install the Pinch Roller Ass'y, install as Remove the 2 Polyslider Washers 1.
  • 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 Link Lever Spacer...
  • Page 10 DISASSEMBLY INSTRUCTIONS 2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 2-20: INCLINED S/T ASS'Y (Refer to Fig. 2-20) Remove the E-Ring 1 and remove the Main Loading Unlock the support 1 and remove the P4 Cover. Gear. Remove the S-S Brake Spring. Unlock the support 2 and remove the Loading Gear Remove the Capstan Brake Spring.

  • 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. NOTE: Initial Data setting will not be possible if clock has been set.

  • 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 Basic Servicing Position (In case of needing to check on all blocks) Unplug the connector CP351, CP757 and CP302, 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 P4 Post 2. Tension Arm T Brake Spring 3. Guide Roller T Reel Ass'y 4. P1 Post Idler Ass'y 5. Audio/Control Head S-S Brake Spring 6. X value adjustment driver hole 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 (G746). (To prevent the damage to IC's and transistors.) CH-1 Fig.
  • Page 27 ELECTRICAL ADJUSTMENTS (TV SECTION) 2-8: HORIZONTAL PHASE Receive the center cross signal from the Pattern 2-4: CONSTANT VOLTAGE Generator. Connect the digital voltmeter to TP401. Using the remote control, set the brightness and Set condition is AV MODE without signal. contrast to normal position.
  • Page 28 ELECTRICAL ADJUSTMENTS 2-11: VERTICAL POSITION 1. BRIGHT NOTE: Adjust after performing adjustments in section 2-10. 2. CONTRAST Receive the center cross signal from the Pattern 3. COLOR Generator. 4. TINT Using the remote control, set the brightness and 5. SHARPNESS contrast to normal position.
  • Page 29 ELECTRICAL ADJUSTMENTS 2-15: SUB CONTRAST 2-20: V. COMP Activate the adjustment mode display of Fig. 1-1 and Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control to press the channel button (1) on the remote control to select "PICTURE".

  • Page 30: Electrical Adjustment Parts Location Guide

    ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP1001 C1003 TP4002 TP4001 IC601 TU601 L608 CP603 J4501 SYSCON 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? Does CHROMA signal Check R4040, Q4006 and appear at pin 52 of IC4001? peripheral circuit. 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 cinnector 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 L4003 5V? of IC4001? L4003 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 Is the voltage at pin 2 of Check P. CON 12V line and CP1005 about DC12V? POWER BLOCK. 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? IC1001? 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 OEC0078C (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 OEC0078C (IC1006) PORT PIN NAME DESCRIPTION — Ground. DEGAUSS OUT Output terminal for DEGAUSS — AT +5V. IN Input terminal of DATA FZTAT input. SOD DATA OUT Output terminal of DATA FZTAT output. SCK1 — Not used. IIC_DATA OUT Output Data terminal for I2CBUS communivation.
  • Page 62 IC DESCRIPTIONS OEC0078C (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 SOUND B IN Input terminal of SOUND IF(4.5MHz,5.5MHz,6.0MHz,6.5MHz) SOUND A 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 (OEC0078C) DPG 107 PIN DFG 108 PIN H. SW. P CH 1 CH 2 100 PIN 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 : CAPSTAN FWD ROTATING SLOW : SETTING SPEED TO SERVO LOADING DIRECTION DIRECTION : MECHANICAL MOVEMENT AND CAPSTAN ROTATING (FWD) : CAPSTAN RVS ROTATING : MECHANICAL MOVEMENT (NO CAPSTAN ROTATING) DIRECTION EJECTION UNLOADING STP3 F. SLOW PB/STP STP2 FF/REW LIGHT...

  • Page 65: Semiconductor Base Connections

    SEMICONDUCTOR BASE CONNECTIONS DIODE CATHODE CATHODE ANODE ANODE 1SS133T-77 11E1N-TA1B2 10ELS2N-TA1B2 SID1050CM EM-553-F1T MTZJ12B T-77 11E1TA1B2 21DQ09N-TA2B1 EQ-552-F1T MTZJ13B T-77 11EQS04N-TA1B2 EG-01C MTZJ33B T-77 11ES1N-TA1B2 EG01Z-V0 MTZJ5.6B T-77 1N4005E-6580-G23 RMPG06J-G3 MTZJ6.8B T-77 GP15M-G23 RU2AM V1 RB721QT-77 RD12FB-T7 SB10-03A3 RU2YX-V1 54PIN 100PIN 8PIN 24PIN...
  • Page 66 SEMICONDUCTOR BASE CONNECTIONS TRANSISTOR 2SA1371(D,E)-AE 2SA933STP(R,S) 2SD2396(J,K) 2SC4160-OEC-YAC1 2SC4217(D,E)-RAC 2SA1037AKT146R,S 2SA733(C)-T(P,Q) 2SC1740SP TP 2SC2412KT146 R,S 2SB892(S,T)-AE DTC114TSTP DTC114EKT147 2SC1815Y(TPE2) 2SC2271(D,E)-AE 2SC2274-AA 2SC2909(S,T)-AA 2SC3000-AA 2SC945(C)-T(P,Q) 2SD734(E,F)-AA GP1S94L 2SD2599 DTA114EKAT146 DTC114ESTP GP1S566 DTA124EKAT146 DTC124EKAT146 DTC143EKAT146...

  • Page 67: Y/C/Audio/Head Amp/21Pin/In/Out

    TV BLOCK DIAGRAM V. OUTPUT IC401 LA7840 R. SIGNAL THERMAL PROTECTION G. SIGNAL PUMP B. SIGNAL COLOR SIGNAL LUMINANCE SIGNAL TUNER VIDEO SIGNAL AUDIO SIGNAL Q405 Q406 DEFLECTION SIGNAL TUNER AUDIO SIGNAL H. DRIVE H. OUTPUT X601 CHROMA/IF 4.433619MHz IC601 FB401 LA76812 J801...
  • Page 68 Y/C/AUDIO/HEAD AMP/21PIN/IN/OUT BLOCK DIAGRAM X4001 4.433619MHz CP4001 6dB AMP 6dB AMP SP-CH2 (L) 2MLPF C CCD CTL TRAP CYL. SP COM fh HPF CLEAR C SQUELCH SP-CH1 (R) SYNC DELAY CLPF N-->P CLOCK TRAP CLPF DEIVER SQUELCH MAIN MAIN H.SW CONV1 CONV2 ENV.DET...
  • Page 69 MICON/OPERATION BLOCK DIAGRAM SW1001 SYSCON/TIMER/SERVO IC1006 OEC0078C SYSTEM RESET 3 OUT IC1002 TAB SW RESET RE5VS31A POWER FAIL POWER_FAIL (DC) AT+5.6V MS SEN-A EXT_IN_L EXT_IN_L MS_SEN A TUNER_MUTE TU_AUDIO_MUTE_H Q1009 AT+5.6V MS SEN-B MS_SEN B Q1019 V.SYNC C SYNC Q1003 P.

  • Page 70: Printed Circuit Boards (Operation/Deck

    PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE CD750_2 C354 W814 W004 R763 CD351_2 C751 J351 W806 W805 SW799 SW798 SW794 R778 R351 W003 R766 SW792 SW793 D797 R773 D793 D796 W807 R761 R754 W812 C755 W809 R350 B701 C781 DECK SOLDER SIDE CP101 CP102 Q101...

  • Page 71: Operation Schematic Diagram

    OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) FROM/TO 21PIN I/O CD750_2 (CP757) CH2A014A REMOCON OUT AT+5V POWER ON L OTPB/PLAY LED KEY A T-REC LED REC LED W818 KEY B ON TIMER LED R766 100 1/2W Vout OS753 R771 R772 R773 R774 PIC-28143TH5 1.5K 2.7K...

  • Page 72: 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 73: Printed Circuit Boards Syscon

    PRINTED CIRCUIT BOARDS SYSCON W307 W900 Q4201 R1037 R4054 Q4007 Q1010 Q1008 R1065 Q1012 C4203 R1069 R4052 Q1006 R4512 R4053 Q4509 W919 W863 R1080 C1022 C4107 R1047 C1062 R4524 Q4502 W868 C4502 C1074 W871 Q1002 Q4501 C1002 B4501 R663 R1020 C1007 W898 C1008...
  • Page 74 PRINTED CIRCUIT BOARDS SYSCON...
  • Page 75 PRINTED CIRCUIT BOARDS SYSCON W307 W900 Q4201 R1037 R4054 Q4007 Q1010 Q1008 R1065 Q1012 C4203 R1069 R4052 Q1006 R4512 R4053 Q4509 W919 W863 R1080 C1022 C4107 R1047 C1062 R4524 Q4502 W868 C4502 C1074 W871 Q1002 Q4501 C1002 B4501 R663 C1007 R1020 W898 C1008...

  • Page 76: Y/C/Audio/Head Amp Schematic Diagram

    Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) L4002 100uH FROM/TO CHROMA/IF 0607 Y/C_VIDEO TU_VIDEO R4040 W803 TU_AUDIO 100 1/4W Y/C_VIDEO FROM POWER Y/C_AUDIO BUFFER Q4006 Q4007 R4055 2SA1037AK 2SC2412K Y/C_AUDIO W905 S804X S812X R4053 R4054 V.ENV P.CON+9V TP4002 560K 330K L4008_1 R4001 P.CON+5V_B FROM/TO 21PIN I/O...

  • Page 77: Micon Schematic Diagram

    MICON SCHEMATIC DIAGRAM (SYSCON PCB) D1006 FROM/TO POWER D1010 SB10-03A3 AT+5.6V SB10-03A3 P.CON+5V_B AT+12V R1096 VCR_POWER_H POWER_FAIL[DC] C1030 CAP_HI_H 0.1 F CAP_VCO X1001 X1002 (LDM) MOTOR_GND 10MHz 32.768 P.CON+5V R1034 FROM/TO Y/C/A/H.AMP SERVICE NC NC TP1001 S809X 5.1 5.1 2.5 LOADING MOTOR DRIVER IC W894 MAIN POWER OFF MUTE SW...

  • Page 78: Chroma/If Schematic Diagram

    CHROMA/IF SCHEMATIC DIAGRAM FROM/TO MICON (SYSCON PCB) TEXT_Y VCR_POWER_H TV_POWER_H R.OUT G.OUT B.OUT R650 TO SOUND AMP 470 1/4W CUT OFF AUDIO_OUT IIC_OFF Q607 AFT_M SOUND+B 2SA733 D602 D603 TEST POINT SOUND_GND R647 CP603 8283_0912_00_000 1SS133 1SS133 P.CON+5V_A SAW FILTER P.CON+9V 120K R642...

  • Page 79: 21Pin/In/Out Schematic Diagram

    21PIN/IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO SOUND AMP FROM/TO MICON SOUND_GND_A SOUND+ ON_TIM/PLAY_LED SP_OUT KEY_B REC_LED T-REC_LED KEY_A FROM POWER D4202 OTPB_LED AT+5.6V W857 W855 11ES1N P.CON+5V_B REMOCON_IN P.CON+9V VV-H POWER ON SW V.OUT Q4201 EXT_IN_L DTC114EK TP4501 TU_AUDIO_MUTE_H S818Y TUNERON/OFF FROM CHROMA/IF TU_AUDIO...

  • Page 80: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) TO Y/C/A/H.AMP CAP MID VCC DRIVER P.CON+5V_B Q1011 2SD2396 D1009 P.CON+9V 28.3 1N4005E DRIVER Q1010 DTA114EKA R1036 P.CON+5V DRIVER FROM/TO MICON 28.3 1.8K 1/4W Q1019 2SB892 P.CON+5V 26.9 CAP VCC ADJ. P.CON+5V_B Q1012 26.9 FROM TV POWER CAP_VCO 2SC2412K CAP_HI_H...

  • Page 81: Sound Amp Schematic Diagram

    SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) SOUND AMP IC IC352 AN7523 C360_1 C361 0.001 B A_MUTE SW Q353 2SC2412K FROM/TO 21PIN I/O SP_OUT SOUND+ SOUND_GND_A FROM MICON S106Y 1/4W R308 R353 TV_POWER_H 68K 1/4W R355 A_MUTE SW L001 TV_A_MUTE HF57T18.5*10*10 Q351 10K 1/4W CP302_1...

  • Page 82: T'text Schematic Diagram

    T’TEXT SCHEMATIC DIAGRAM (SYSCON PCB) W893 W815 W854 TO CHROMA/IF TEXT_B W883 TEXT_G TEXT_R W884 TEXT_Y W886 FROM 21PIN I/O 21_Y 21_R 21_G 21_B PCB010 VM9162 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

  • Page 83: Printed Circuit Boards (Main/Crt/Power Sw

    PRINTED CIRCUIT BOARDS MAIN/CRT/POWER SW C520 R530 CP820 W006 W047 W005 HS503 C501 CP810 R423 W012 S802Y C511_1 S105Y W817 W822 IC505 C537 IC503 W010 IC504 D533 D517 W027 S105X W823 HS505 D519 S802X R519 C523_2 W816 R520 C519 R460 W825 C527 C422_1...

  • Page 84: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 LA7840 THERMAL PUMP UP PROTECTION W837 (W034) 14.2 23.5 22.8 C412 TO DY CP401 500V 390P B05B-DVS C409 0.0022 M R404 R413 R416 5.6K FROM/TO CHROMA/IF CP820 (CD820) 8283_1112_00_000 SOUND GND SOUND+B CC004 HS401 TP-1S-05...

  • Page 85: 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 86: Crt Schematic Diagram

    CRT SCHEMATIC DIAGRAM (CRT PCB) 132.9 104.1 132.8 132.5 TP801 FROM CHROMA/IF J801 R802 CP850 (CD850) HPS3200-010501 8283_0512_00_000 12K 2W W803 CUT_OFF 132.5 G.OUT R807 RED AMP R.OUT Q804 2.7K 1/4W B.OUT 2SC4217 R806 1/4W R811 4.7K TP802 R805 12K 2W 132.1 W804 GREEN AMP...

  • Page 87: Interconnection Diagram

    INTERCONNECTION DIAGRAM J351 TM101 OS753 J701 HALL MAIN ROTOR V.OUT OPERATION SENSOR COIL MAGNET FG SENSOR PCB030 TEXA19 S101 S102 L004 L005 HALL HALL SW501 SWITCH LOGIC CP1004 L001 MOTOR GND SPEAKER CD354 CP302 I LIMIT BROWN SP OUT SP351 SOUND GND BLUE POWER SW...

  • Page 88: Waveforms

    WAVEFORMS TV POWER 1 5V 0.1ms/div 7 20V 20µs/div 13 POWER ON 18 POWER ON 23 POWER ON 28 PB 200mV 50ns/div 2V 20µs/div 50mV 1ms/div 1V 0.5µs/div DEFLECTION DEFLECTION 3 0.5V 10ms/div 8 10V 10ms/div 19 REC 24 POWER ON 29 PB 14 POWER ON 0.5V 5µs/div...
  • Page 89 WAVEFORMS CHROMA/IF 44 POWER ON 33 POWER ON 38 POWER ON 0.5V 10µs/div 5mV 1ms/div 0.5V 10ms/div 45 POWER ON 34 POWER ON 39 POWER ON 200mV 1ms/div 5mV 1ms/div 200mV 50µs/div 35 POWER ON 40 POWER ON 0.5V 20µs/div 2V 50µs/div 36 POWER ON 41 POWER ON...

  • Page 90: 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 91 MECHANICAL EXPLODED VIEW TU601 J4501 PCB010 (SYSCON PCB) K1-2...

  • Page 92: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY S5-455-3M7-200 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 93: 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 94: 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 Check if the correct grease or oil is applied for G-555G each position.

  • Page 95: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY ---- DECK ASS'Y A54508M420A 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-OP2-002-700 BELT,CAPSTAN S5-OP9-006-900 CASS HOLDER S5-OP9-007-100 LEVER,REC S5-OP9-006-910 LOCKER,L S5-OP5-000-830 BASE,AC HEAD S5-OP9-006-920 LOCKER,R S5-OP8-003-240 SPR,AC HEAD...

  • Page 96: 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 R620 87-025-362-080 RES,M 390-1/6W C4042 87-010-400-080 CAP,E 0.47-50V R1005 S6-150-12R-7J0 RES,FUSE 2.7-1W C4049 87-010-076-040 CAP,E 22UF-6.3V...
  • Page 97 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** ICS *** *** COILS *** IC601 S0-3DE-681-200 IC,LA76812 L4001 S3-262-300-380 COIL,TRAP 2623003 IC602 S0-Q09-780-500 IC,NJM7805FD L4002 S2-167-D10-1K0 COIL,100UH IC1001 S0-7SQ-955-AN0 IC,BA6955AN L4003 S2-167-D10-1K0 COIL,100UH IC1002 SE-1J0-S31-AH0 IC,RE5VS31A L4004 S2-167-D10-1K0 COIL,100UH...
  • Page 98 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION OPERATOIN PCB ASS'Y *** CAPACITORS *** *** DIODES *** C407 87-016-588-080 CAP,E 2200-25V C411 S1-220-512-000 CAP,MPL 0.47-100V D791 S0-21M-2Q1-200 LED,EQ-552-F1T C412 S0-JTB-05N-2K0 CAP,CER 390P-500V D792 S0-21M-2Q1-200 LED,EQ-552-F1T C413 S6-11T-110-4J0 CAP,MPL 0.1-100V T D793...
  • Page 99 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** DIODES *** *** FUSES *** D521 87-A40-172-080 DIODE,EG01Z-V0 FH503 S6-710-T00-060 HOLDER,FUSE EYF-52B D523 87-020-465-010 DIODE,1SS133T FH504 S6-710-T00-060 HOLDER,FUSE EYF-52B D525 S2-BT0-EG0-1C0 DIODE,EG-01C D528 87-017-931-010 ZENER,MTZJ5.6B *** RELAY *** D529 87-020-465-010 DIODE,1SS133T...
  • Page 100 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION AND OTHERS *** COILS *** L001 S2-A6A-8A0-A10 CORE,FERRITE HF57T18.5*10*10 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...
  • Page 101 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 737004 Printed in Singapore...

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