Aiwa VX-G143 Service Manual
  1. Manuals
  2. Brands
  3. Aiwa Manuals
  4. TV VCR Combo
  5. VX-G143
  6. Service manual
Aiwa VX-G143 Service Manual

Aiwa VX-G143 Service Manual

Ntegrated color tv /video cassette recorder
Hide thumbs Also See for VX-G143:
Table of Contents

Advertisement

Quick Links

See also: Service Manual
This SERVICE MANUAL is exclusive with KAL model.
The A is indicated for KAL model after the Model Name on the Spec. Plate.
The specification for KAL model and K model is common. But, there are slightly differences between the 2
models on the Electric Circuit and Structure Parts.

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. 09-006-345-5N2
VX-G143
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.
KAL
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)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the VX-G143 and is the answer not in the manual?

Questions and answers

Related Manuals for Aiwa VX-G143

Summary of Contents for Aiwa VX-G143

  • Page 1: Service Manual

    VX-G143 This SERVICE MANUAL is exclusive with KAL model. The A is indicated for KAL model after the Model Name on the Spec. Plate. The specification for KAL model and K model is common. But, there are slightly differences between the 2 models on the Electric Circuit and Structure Parts.

  • 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.W. 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 PWB...

  • 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 2-6: LINK ASS'Y (Refer to Fig. 2-6) 2-9: TENSION ASS'Y (Refer to Fig. 2-9-A) 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. 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 PWB from the VCR Block. Connect as shown in the below figure using the Service Fixture.
  • Page 20 PREPARATION FOR SERVICING Servicing Position for Main PWB (In case of needing to check on Main PWB) • 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 PWB...

  • 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 PWB 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 SIZE 1. BRIGHT NOTE: Adjust after performing adjustments in section 2-10. 2. CONTRAST Receive the cross hatch 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 2-16: SUB SHARPNESS Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control to select "PICTURE". The Fig. 2-6 appears on the display. Press the channel button (5) on the remote control to select "SHARPNESS".

  • Page 30: Electrical Adjustment Parts Location Guide

    ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP1001 C1003 TP4002 TP4001 IC601 TU601 TU601 11 pin L608 CP603 J4501 TP4501 SYSCON PWB D2-5...
  • Page 31 ELECTRICAL ADJUSTMENTS (TV SECTION) J801 TP801 CRT PWB VR502 T501 FOCUS VOLUME FB401 SCREEN VOLUME TP401 MAIN PWB D2-6...

  • Page 32: Purity And Convergence Adjustments

    ELECTRICAL ADJUSTMENTS 4. PURITY AND CONVERGENCE 4-3: STATIC 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

    TROUBLESHOOTING GUIDE (Television division) (In case that there isn't a normal tension for time to do ( 1 ) that a power supply doesn't standby 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 enter standby CD810 every terminal) Is the voltage 5V for Investigate D1006. IC1006 36th pin or not? Is the voltage of IC1006 Investigate D1008.
  • 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 IC601 1st pin come to IC352 6th pin or not? or not? Investigate IC601 peripheral circuit. Investigate R517, D505 and Is the voltage of IC352 D509.
  • Page 36 TROUBLESHOOTING GUIDE A color doesn't adhere to it Whether is wave form of Investigate X601. IC601 38th pin normal or not? Whether is wave form of IC601 19th pin,20th pin and Investigate IC601. 21th pin normal or not? Investigate CRT PWB and a peripheral circuit.
  • Page 37 TROUBLESHOOTING GUIDE An image doesn't appear Is the voltage DC 5V for Investigate IC602 3rd pin. IC601 43th pin or not? Whether is a luminance Investigate IC601. signal early in IC602 42th pin or not? Whether is a luminance signal early in IC4001 Investigate IC4001.
  • Page 38 TROUBLESHOOTING GUIDE An only horizontal line appears Is the voltage DC 25V for Investigate C429 and D411. IC401 6th pin or not? Investigate CRT, IC401 and a Is the voltage DC 25V for peripheral circuit. IC401 2nd pin or not? Whether does a video Investigate IC601.
  • 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 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 Replace IC1006. at pin 3 of CP1004 is 2V or at pin 83 of IC1006 is normal? In playback, is the Check pins between 72 and 108 of...
  • 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? 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 PWB. 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 PWB. 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 Check IC1006. at pin 5 of CP1005 about DC1.2V? Check CYLINDER MOTOR.
  • Page 51 TROUBLESHOOTING GUIDE AUDIO SHAKES Replace AUDIO HEAD. Is AUDIO HEAD scratched? Does pin 9 of IC1006 Replace CAPSTAN DD MOTOR. output a 3.0Vp-p square 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 26 and 25 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 26 of IC1006 LOW? Check R1056 circuit.
  • Page 54 TROUBLESHOOTING GUIDE FF/REW DO NOT WORK When the FF/REW is pushed, Check pin 71 of IC1006 lines. does the PULSE appear at Replace IC1006. pin 71 of IC1006? Is the voltage change at Check pin 7 of CP1004 and pin 7 of CP1004 when peripheral 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, AT 12V? Replace CYLINDER UNIT. Does TP4001 feed Does PG PULSE HEAD SWITCHING appear at pin 103 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 24 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 a t pin 69 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 104 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 OEC0093B (IC1006) PORT PIN NAME DESCRIPTION SVSS SVSS — Ground. CTLREF CTLREF OUT Output terminal for AMP REFERENCE. CTL(+) CTL(+) I/O Input and output terminal of Control Head. CTL(-) CTL(-) I/O Input terminal of Control Head. CTLBIAS CTLBIAS IN Input terminal for Control Bias.
  • Page 61 IC DESCRIPTIONS OEC0093B (IC1006) PORT PIN NAME DESCRIPTION 32KHz_MONITOR OUT Not used. T-REC_LED OUT Output terminal control for T-REC-LED voltage drive. REC/OTR_LED OUT Output terminal control for REC-LED voltage drive. ON_TIMER_LED OUT Output terminal control for ON TIMER-LED voltage drive. PLAY_LED OUT Output terminal control for PLAY-LED voltage drive.
  • Page 62 IC DESCRIPTIONS OEC0093B (IC1006) PORT PIN NAME DESCRIPTION OUT Not used. TV MUTE-H OUT Mute signal of TV mute. VCR MUTE-H OUT Mute signal of VCR mute. V.REC.START-H OUT Output terminal for REC signal when record. TUNER MUTE-H OUT Mute signal of audio mute for tuner. OUT Not used.

  • Page 63: Servo Timing Chart

    SERVO TIMING CHART IC1006 (OEC0093B) DPG 103 PIN DFG 104 PIN 24 Cycle CH 1 H. SW. P 105 PIN CH 2 V-SYNC (E-E) 15 PIN REC CTL (REC) 7 PIN V-SYNC (TRICK PB) 109 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

    SEMICONDUCTOR BASE CONNECTIONS D I O D E CATHODE CATHODE ANODE ANODE 1SS133T-77 11E1-EIC 10ELS2N-TA1B2 SID1050CM EQ-552-F1T GBL06L-6177 MTZJ33B T-77 11EQS04N-TA1B2 21DQ09N-TA2B1 MTZJ5.6B T-77 11ES1N-TA1B2 EG-01C RB721QT-77 1N4005E-6580-G23 EG01Z-V0 SB10-03A3 RD12FB-T7 RMPG06J-G3 RU2YX-V1 RU2AM V1 5 4 P I N 1 0 0 P I N 8 P I N 3 P I N...

  • Page 66: Semiconductor Base Connections

    SEMICONDUCTOR BASE CONNECTIONS TRANSISTOR 2SA1371(D,E)-AE 2SA933STP(R,S) 2SC4217(D,E)-RAC 2SA1037AKT146R,S RPI-352Q01R 2SD2499 2SB892(S,T)-AE DTC114TSTP 2SC2412KT146 R,S 2SC1815Y(TPE2) DTC114ESTP DTA124EKAT146 2SC2271(D,E)-AE DTC114EKAT146 2SC2909(S,T)-AA DTC114EKT147 2SC3000-AA DTC114TKAT146 2SC3331(S,T,U)-A DTC124EKAT146 2SC945(C)-T(P,Q) 2SD734(E,F)-AA PNA2604M010R RPI-301 G - 2...

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

    R. SIGNAL TV BLOCK DIAGRAM SOUND AMP. G. SIGNAL V. OUTPUT IC401 LA78040 IC352 AN7523 B. SIGNAL THERMAL COLOR SIGNAL PROTECTION LUMINANCE SIGNAL PUMP TUNER VIDEO SIGNAL AUDIO SIGNAL DEFLECTION SIGNAL SP351 SPEAKER TUNER AUDIO SIGNAL Q405 Q406 J351 H. DRIVE H.
  • Page 68 Y/C/AUDIO/HEAD AMP/21PIN/IN/OUT BLOCK DIAGRAM Q4010 X4001 4.433619MHz BUFFER 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 CLPF DELAY N-->P CLOCK 2FSC_A TRAP CLPF DEIVER SQUELCH MAIN MAIN H.SW...

  • Page 69: Micon/Operation

    MICON/OPERATION BLOCK DIAGRAM SW1001 SYSCON/TIMER/SERVO IC1006 OEC0093B SYSTEM RESET TAB SW /RES 3 OUT IC1002 RE5VS31A POWER_FAIL POWER_FAIL (DC) AT+5.6V MS SEN-A EXT_IN-L EXT_IN_L MS_SEN A TUNER_MUTE Q1009 TU_AUDIO_MUTE_H 4/2FSC IN 2FSC_A MS SEN-B MS_SEN B C.SYNC V.SYNC Q1003 VCR_MUTE VCR_A_MUTE Q1002 CTL(+)

  • Page 70: Printed Wiring Boards (Operation/Deck

    PRINTED WIRING BOARDS OPERATION SOLDER SIDE R763 W814 W004 C351 C751 CD351_2 B702 CD750_2 R772 W806 SW750 R351 SW797 SW796 SW794 R771 D791 D797 OS753 W002 R762 R766 SW793 D796 D793 W807 C355 W812 C702 W804 R761 R754 R773 L703 R350 B701 C781...

  • Page 71: Operation Schematic Diagram

    OPERATION SCHEMATIC DIAGRAM FROM/TO 21PIN I/O CD750_2 (CP757) CH2A014A (OPERATION PWB) REMOCON OUT AT+5V POWER ON L OTPB LED KEY A T-REC LED REC LED KEY B ON TIMER LED R766 100 1/2W Vout OS753 R771 R772 R773 R774 PIC-28143TH5 W804 1K 1/4W 1.5K 1/4W...

  • Page 72: Deck Schematic Diagram

    DECK SCHEMATIC DIAGRAM (DECK PWB) LOADING MOTOR M101 S105 BOT SENSOR Q101 S106 RPT-38PB113 S101 S102 S103 S104 FROM/TO MICON (CP1006) CP101 52044-0445 LDM+ LDM- PWB550 VE8851 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE: THE DC VOLTAGE AT EACH PART WAS CAUTION: SINCE THESE PARTS MARKED BY ATTENTION:...

  • Page 73: Printed Wiring Boards (Syscon

    PRINTED WIRING BOARDS SYSCON R1074 W844 C4101 Q610 Q609 R4054 Q4007 R4055 C4033 R4052 R4053 R1008 Q4201 R1004 C1006 R1055 R641 R639 R1029 W863 R1078 R1028 S816X R1080 Q1004 C4107 Q605 C1040 R1060 R4524 Q1002 Q4502 W868 W871 Q4501 C1008 C1035 B4501 C1050...
  • Page 74 PRINTED WIRING BOARDS SYSCON...
  • Page 75 PRINTED WIRING BOARDS SYSCON R1074 W844 C4101 Q610 Q609 R4054 Q4007 R4055 C4033 R4052 R4053 R1008 Q4201 R1004 C1006 R1055 R641 R639 R1029 W863 R1078 R1028 S816X R1080 Q1004 C4107 Q605 R1060 C1040 R4524 Q1002 Q4502 W868 W871 Q4501 C1008 C1035 B4501 C1050...

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

    Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM RECORD LUMINANCE SIGNAL RECORD COLOR SIGNAL (SYSCON PWB) PLAYBACK COLOR SIGNAL PLAYBACK LUMINANCE SIGNAL CAUTION: DIGITAL TRANSISTOR TUNER VIDEO SIGNAL L4002 W820 AUDIO SIGNAL(REC) BUFFER Q4010 100uH AUDIO SIGNAL(PB) 2SC2412K 0607 TUNER AUDIO SIGNAL BUFFER FROM/TO CHROMA/IF W803 Y/C_VIDEO Q4006...

  • Page 77: Micon Schematic Diagram

    MICON SCHEMATIC DIAGRAM (SYSCON PWB) CAUTION: SINCE THESE PARTS MARKED BY CRITICAL FOR SAFETY,USE ONES DESCRIBED IN PARTS LIST ONLY NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER ATTENTION: LES PIECES REPAREES PAR UN ETANT DANGEREUSES AN POINT DE VUE SECURITE DURING PLAYBACK N’UTILISER QUE CELLS DECRITES...

  • Page 78: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (SYSCON PWB) P.CON+5V_B FROM/TO Y/C/A/H.AMP P.CON SW P.CON+9V Q1010 2SD734 P.CON+5V 5V REG. IC IC1005 KIA7805API FROM/TO MICON 9V REG IC VCR_POWER_H IC1003 KIA7809API R1052 AT+5.6V AT+12V P.CON+5V 220 1/4W MOTOR_GND HS1001 763WAA0157 AT+5.6V FROM/TO CHROMA/IF FROM/TO TV POWER 12.0 P.CON+9V AT+5.6V...

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

    21PIN/IN/OUT SCHEMATIC DIAGRAM (SYSCON PWB) FROM/TO MICON FROM/TO SOUND AMP SOUND_GND_A ON_TIM_LED SOUND+ KEY_B SP_OUT REC_LED T-REC_LED KEY_A W824 FROM/TO POWER OTPB_LED D4202 AT+5.6V W825 11ES1N REMOCON_IN W822 STANDBY_H P.CON+5V TUNERON/OFF-A POWER ON SW VV-H Q4201 EXT_IN_L DTC114EK TU_AUDIO_MUTE_H AT+5.6V_A P.CON+9V C1101 C1102...

  • Page 80: Chroma/If Schematic Diagram

    FROM/TO MICON CHROMA/IF SCHEMATIC DIAGRAM SD-L/AFC-OFF-H VV-H R.SIGNAL TUNER VIDEO SIGNAL (SYSCON PWB) G.SIGNAL TUNER AUDIO SIGNAL TEXT_Y B.SIGNAL AUDIO SIGNAL(REC) VCR_POWER_H RECORD LUMINANCE SIGNAL AUDIO SIGNAL(PB) TV_POWER_H RECORD COLOR SIGNAL R.OUT G.OUT B.OUT POWER_FAIL[DC] DEGAUSS_H C663 FROM/TO SOUND AMP V.REF R614 6.3V...

  • Page 81: Sound Amp Schematic Diagram

    SOUND AMP SCHEMATIC DIAGRAM (SYSCON PWB) SOUND AMP IC IC352 AN7523 C360 1 B C361 0.001 B A_MUTE SW Q353 2SC2412K FROM/TO 21PIN I/O SP_OUT W846 SOUND+ SOUND_GND_A FROM/TO MICON D350 M.POWEROFFMUTE_H R308 1SS133 R353 TV_POWER_H 1/4W 68K 1/4W R355 L001 A_MUTE SW TV_A_MUTE...

  • Page 82: T'text Schematic Diagram

    T’TEXT SCHEMATIC DIAGRAM (SYSCON PWB) W893 W815 W854 FROM/TO CHROMA/IF TEXT_B TEXT_G TEXT_R TEXT_Y FROM/TO 21PIN I/O TEXT_Y 21_Y 21_R 21_G 21_B PWB010 VMX193 R.SIGNAL NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE: THE DC VOLTAGE AT EACH PART WAS OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE MEASURED WITH THE DIGITAL TESTER G.SIGNAL...

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

    PRINTED WIRING BOARDS MAIN/CRT/POWER SW SOLDER SIDE CP820_1 R509 D410 C520 Q509 W012 R520 W010 R423 R524 Q405 Q501 W824 Q505 CP810_1 W817 R456 D530 R460 R518 C416 Q508 Q503 C417 D534 R449 W043 C438 R447 Q502 W816 C519 C527_1 D508 T401 B504...

  • Page 84: Tv Power Schematic Diagram

    TV POWER SCHEMATIC DIAGRAM (MAIN PWB) DEGAUSS_H FROM/TO DEFLECTION DEGAUSS_H RELAY DRIVE Q504 SOUND+B D516 2SC1815Y TV.POWER_H 1SS133 P.CON+125V POWER_FAIL AT+125V VCR.POWER_H RY501 SOUND_GND ALKS321 DEGAUSS C516 W830 COIL L503 500V 470P CP502 8F140018 TV-50P-02-A1 R517 D505 SOUND+B 21DQ09N 0.22 D509 TH501 PTH451A140M21...

  • Page 85: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PWB) V.OUTPUT IC401 LA78040 THERMAL PROTECTION PUMP UP TO DY 25.7 14.1 26.2 CP401 B05B-DVS W805 FROM/TO CHROMA/IF CP820_1 (CP502) 8283_1312_00_000 SOUND +B SOUND GND H.OUT R413_1 R427 R425 10K +-1% P.CON+5V 8.2K 1/4W 8.2K 1/4W L402 V.OUT ELH5L4112...

  • Page 86: Crt Schematic Diagram

    CRT SCHEMATIC DIAGRAM (CRT PWB) 132.9 J801_1 104.1 HPS3200-010501 132.8 132.5 FROM CHROMA/IF TP801 CP850 (CD850) R802 8283_0512_00_000 12K 2W R807 CUT OFF G.OUT 132.5 2.7K 1/4W R.OUT RED AMP B.OUT Q804_1 2SC4217 TP802 R808 2.7K 1/4W C809 270P B R811 270 1/4W R805...

  • Page 87: Interconnection Diagram

    INTERCONNECTION DIAGRAM J351 J701 TM101 OS753 HALL MAIN ROTOR V.OUT OPERATION PWB SENSOR COIL MAGNET FG SENSOR PWB030 TEXA19 S101 S102 POWER SW PWB PWB340 HALL HALL SWITCH TEXA36 LOGIC CP1004 AC230V 50Hz CD501 CP504 MOTOR GND BLUE SPEAKER CD354 CP302 I LIMIT SP OUT...

  • Page 88: Waveforms

    WAVEFORMS TV POWER 17 POWER ON 22 POWER ON 27 PB 1 5V 0.1ms/div 7 20V 20µs/div 12 PB 50mV 1ms/div 1V 20µs/div 1V 0.5µs/div 10mV 5ms/div DEFLECTION DEFLECTION 2 5V 50µs/div 23 POWER ON 18 POWER ON 28 PB 8 10V 10ms/div 13 POWER ON 50mV 1ms/div...
  • Page 89 WAVEFORMS 32 POWER ON 37 POWER ON 42 POWER ON 20mV 1ms/div 0.5V 20µs/div 200mV 10µs/div CHROMA/IF 33 POWER ON 38 POWER ON 43 POWER ON 5mV 1ms/div 0.5V 10ms/div 10mV 10µs/div 39 POWER ON 34 POWER ON 44 POWER ON 200mV 50µs/div 5mV 1ms/div 0.5V 10µs/div...

  • Page 90: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PWB110 (CRT PWB) L503 V801 PWB070 (MAIN PWB) FB401 PWB340 (POWER SW PWB) SP352 SW501 PWB030 (OPERATION PWB) SP351 K1-1...
  • Page 91 MECHANICAL EXPLODED VIEW L002 TU601 J4501 PWB010 (SYSCON PWB) 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 S5-708-2G7-200 CABI,FRONT ASS'Y ---- FELT SHEET ---- SHIELD,CASE HEAD AMP ---- FELT SHEET ---- PLATE,EARTH-SYSCON ---- FELT SHEET S3-5WP-D06-800 BUTTON,REC S5-OP7-000-360 HOLDER,EOT SENSOR ---- HEAT SINK S5-1WS-A00-160 COVER,TRANS S7-1WP-A02-430 PLATE,JACK...

  • Page 93: Chassis Exploded View (Top View)

    CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5001 H5002 M101 PWB550 (DECK PWB 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 MG-33 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 G-555G Check if the correct grease or oil is applied for 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 ASSY A57054A420A S5-OP8-003-360 SPR,CAP BRAKE (S) S5-OP8-003-420 SPRING,LOCKER(S) S5-OA5-000-220 AHC ASS'Y S5-OP8-003-260 SPR,LINK S5-OP2-002-900 BELT,CAPSTAN (S) S5-OP8-003-280 SPR,DAMPER S5-OP9-007-100 LEVER,REC S5-OP8-003-300 SPR,RING S5-OP5-000-830 BASE,AC HEAD S5-OP8-003-370 SPR,SS BRAKE (S) S5-OP8-003-240 SPR,AC HEAD...

  • Page 96: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF.NO. DESCRIPTION REF.NO. DESCRIPTION C4041 87-010-404-080 CAP,E 4.7-50V SYSCON PWB ASS'Y C4042 87-010-400-080 CAP,E 0.47-50V C4049 87-010-076-040 CAP,E 22UF-6.3V *** RESISTORS *** C4050 87-010-404-080 CAP,E 4.7-50V C4051 87-015-075-040 CAP,E 10-16V R350 S3-X18-A01-0J0 RES,MO 1-2W C4055 87-010-374-080 CAP,E 47-6.3V R620 87-025-362-080...
  • Page 97 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. DESCRIPTION REF.NO. DESCRIPTION L4008 87-003-112-010 COIL,1MH *** TRANSISTORS *** L4009 S2-167-D10-1K0 COIL,100UH L4011 87-003-282-010 COIL,12UH Q351 89-324-122-080 TR,2SC2412KT L4012 87-003-154-080 COIL,220UH Q353 89-324-122-080 TR,2SC2412KT L4013 S2-167-D10-1K0 COIL,100UH Q601 SC-3T0-300-000 TR,2SC3000 L4015 S2-167-D10-1K0 COIL,100UH Q602 89-324-122-080 TR,2SC2412KT L4016 87-003-285-010...
  • Page 98 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. DESCRIPTION REF.NO. DESCRIPTION B701 S2-4AT-036-550 CORE,BEADS BL01RN1-A63T6 C506 S2-122-B10-4M0 CAP,MP 0.1-250V B702 S2-4AT-036-550 CORE,BEADS BL01RN1-A63T6 C507 S1-9A0-C01-040 CAP,E 100-400V C510 S5-EZT-422-1M0 CAP,E 220-35V L004 S2-A6A-8A0-A10 C513 S5-EZT-522-0M0 CAP,E 22-50V CORE,FERRITE HF57T18.5*10*10 L005 S2-A6A-8A0-A10 C514 S0-JLY-R7H-3K0 CAP,0.0022-2KV CORE,FERRITE HF57T18.5*10*10 L703...
  • Page 99 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. DESCRIPTION REF.NO. DESCRIPTION Q513 SN-YTB-030-010 TR,DTC114E *** COILS *** *** COILS *** L801 S2-167-D10-1K0 COIL,100UH B504 S2-4AT-036-550 CORE,BEADS BL01RN1-A63T6 B505 S2-4A8-407-C30 CORE,BL02RN2-R62T2 *** CONNECTORS *** L401 87-003-143-010 COIL,4.7MH CP850 S6-9E2-501-290 CONN,PWB SIDE L402 S2-210-000-130 COIL,LINEA ELH5L4112 L501 S2-9K0-000-010 FILTER,RB-20871...
  • Page 100 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111 737004 Printed in Singapore...

Table of Contents