Aiwa VX-C131U Service Manual
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Aiwa VX-C131U Service Manual

Color tv/cassette recorder
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SERVICE MANUAL

INTEGRATED COLOR TV / STEREO VIDEO
CASSETTE RECORDER
GENERAL
POWER REQUIREMENTS .................
POWER CONSUMPTION ...................
WEIGHT ..............................................
DIMENSIONS ......................................
TV SECTION
PICTURE TUBE ..................................
TUNER SYSTEM ................................
CHANNEL COVERAGE ......................
PROGRAM MEMORY .........................
TV SYSTEM ........................................
HORIZONTAL RESOLUTION ............
ANTENNA INPUT ...............................
VCR SECTION
OPERATING TEMPERATURE ...........
VIDEO RECORDING SYSTEM ..........
VX-C131
BASIC TAPE MECHANISM : OVD-6
SPECIFICATIONS
120V AC, 60Hz
89W
TYP 4W (power save mode)
13.5 kg (29.8 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.)
208 mm (W) x 211 mm (H)
(8 1/4 x 8 3/8 in.)
335 mm (diagonal) (13 in.)
Frequency synthesized tuner
VHF: 2 to 13
UHF: 14 to 69
CATV: 5A, A-1 to A-5, A to W,
W+1 to W+84
181
M
230 lines
75 ohms, unbalanced
5°C to 40°C
Rotary 2 head helical scanning
system
S/M Code No. 09-004-344-4N1
VIDEO SIGNAL SYSTEM ................
VIDEO HEAD ...................................
USABLE CASSETTES .....................
TAPE SPEED ...................................
RECORDING/PLAYBACK TIME .....
VIDEO INPUT ...................................
VIDEO OUTPUT ..............................
VIDEO S/N .......................................
AUDIO INPUT ..................................
AUDIO OUTPUT ..............................
AUDIO TRACK .................................
FAST-FORWARD TIME ...................
REWIND TIME .................................
•
Design and specifications are subject to change without
notice.
U
NTSC color system, 525 lines, 60
fields
Azimuth 2 head
VHS video cassette
S-VHS video cassette (play back only)
SP: 33.35 mm/sec
LP: 16.67 mm/sec
SLP: 11.12 mm/sec
SP: 3 hours with T-180 tape
LP: 6 hours with T-180 tape
SLP: 9 hours with T-180 tape
1.0Vp-p, 75 ohm, unbalanced
1.0Vp-p, 75 ohm, unbalanced
53dB (nominal)
–8dBs, 50K ohm
–8dBs, less than 1K ohm
1 tracks (Normal sound)
Approx. 2 minutes 15 seconds
with T-120 tape
Approx. 1 minute 48 seconds
with T-120 tape

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  • Page 1: Service Manual

    VX-C131 SERVICE MANUAL INTEGRATED COLOR TV / STEREO VIDEO BASIC TAPE MECHANISM : OVD-6 CASSETTE RECORDER SPECIFICATIONS GENERAL POWER REQUIREMENTS ....120V AC, 60Hz VIDEO SIGNAL SYSTEM ....NTSC color system, 525 lines, 60 POWER CONSUMPTION ....fields TYP 4W (power save mode) VIDEO HEAD ........

  • 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, CP352, CP353, CP354, CP401 and CP502). Remove the 2 screws 1.
  • Page 5 DISASSEMBLY INSTRUCTIONS 1-5: DECK SHIELD PLATE (Refer to Fig. 1-5) 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) Remove the 2 screws 1. Remove the screw 1. Remove the screw 2. Remove the Syscon PCB in the direction of arrow (A). Remove the screw 2.

  • 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. 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 simultaneously.

  • 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 heads model) (For 4 heads model) JG002B Adapter JG005 Post Adjustment VHS Alignment Tape VHS Alignment Tape JG002E Dial Torque Gauge Screwdriver JG001 (TTV-N2) JG001B (TTV-N2) (10~90gf•cm) Part No. SV-TG0-030-000 JG001A (TTV-N12) JG001I (TTV-N12) JG002F (60~600gf•cm) (small)

  • Page 19: Preparation For Servicing

    PREPARATION FOR SERVICING Basic Servicing Position (In case of needing to check on all blocks) Unplug the connector CP351, CP352, CP353 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 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) 2-7: VERTICAL SIZE NOTE: Adjust after performing adjustments in section 2-6. 2-4: CONSTANT VOLTAGE Receive the cross hatch signal from the Pattern Connect the digital voltmeter to TP401. Generator. Set condition is AV MODE without signal. Adjust the VR502 until the DC voltage is 135 ±...
  • Page 28 ELECTRICAL ADJUSTMENTS 2-12: SUB BRIGHTNESS 2-14: SUB TINT Receive the black pattern*. (RF Input) Receive the color bar pattern. (RF Input) Using the remote control, set the brightness and Using the remote control, set the brightness, contrast, contrast to normal position. color and tint to normal position.
  • Page 29 ELECTRICAL ADJUSTMENTS 2-18: WHITE BALANCE NOTE: Adjust after performing adjustments in section 2-11. Place the set with Aging Test for more than 15 minutes. Receive the white 100% signal from the Pattern Generator. Using the remote control, set the brightness and contrast to normal position.

  • Page 30: Electrical Adjustment Parts Location Guide

    ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP1001 TP1002 TP4001 TU601 CP603 L610 TP601 TP4201 J4201 SYSCON PCB D2-5...
  • Page 31 ELECTRICAL ADJUSTMENTS (TV SECTION) J801 TP803 TP801 CRT PCB VR502 TP401 T501 FOCUS VOLUME FB401 SCREEN VOLUME MAIN PCB 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 standby CD810 every terminal) enter Is the voltage 5V for Investigate D1006 and D1011. IC1001 99th pin or not ? Is the voltage of IC1001 Investigate D1014 and Q1023.
  • Page 35 TROUBLESHOOTING GUIDE A voice isn't though an image appears Whether does a signal Whether does a signal Investigate IC4001 76th pin, come to IC352 6th pin come to IC604 66th pin 78th pin and 80th pin. or not ? or not ? Investigate IC604 peripheral circuit.
  • Page 36 TROUBLESHOOTING GUIDE A color doesn't adhere to it Whether is wave form of Investigate X604. IC604 47th pin normal or not ? Whether is wave form of Investigate IC604. IC604 54th pin normal or not ? IC604 17th pin, 18th pin, and whether is wave form Investigate IC604.
  • Page 37 TROUBLESHOOTING GUIDE An image doesn't appear Is the voltage DC 5V for Investigate P.CON 5V line. IC604 6th pin or not ? Whether is a luminance signal early in IC604 Investigate IC604. 56th pin or not ? Whether is a luminance 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 14V for peripheral circuit. IC401 2nd pin or not ? Whether does a vertical Investigate IC604.
  • Page 39 TROUBLESHOOTING GUIDE (VCR SECTION) PLAYBACK CHANGES TO STOP Insert a cassette and press 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 the voltage at pin 55 of Does E-E appear on the Check Power circuit. IC4001 5V ? Monitor TV ? Is there PB Y/C signal Check PB Y/C at pin 74 of IC4001 and at TP4001 ? the connection of the CYLINDER.
  • Page 41 TROUBLESHOOTING GUIDE NO COLOR DURING PLAYBACK Check HEAD AMP BLOCK. Does FM ENVELOPE Replace IC4001. appear at TP4001 ? Does CHROMA signal Check R4067 and peripheral at pin 72 of IC4001 ? circuit. Does COMPOSITE Replace IC4001. signal appear at pin 43 of IC4001 ? Check TV Block.
  • Page 42 TROUBLESHOOTING GUIDE PLAYBACK PICTURE IS NOISY (EVEN AFTER CLEANING HEADS) Is FM signal at TP4001 Check HEAD AMP and interchange more than 200mVp-p ? adjustments. Is FM signal at pin 72 of Check pin 74 of IC4001 and IC4001 200mVp-p ? peripheral circuit.
  • Page 43 TROUBLESHOOTING GUIDE NO COLOR DURING SELF RECORDING AND PLAYBACK Does VIDEO signal Check J4201, J701 and VIDEO appear at pins 36 input circuit. and 34 of IC4001 ? Does CHROMA signal Check pin 71 of IC4001. appear at TP4001 during Replace IC4001.
  • 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 or stains. Does AUDIO signal appear Check the connector from AUDIO at pin 4 of IC4001 ? 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 DC12V ? Is the voltage at pin 8 Check POWER circuit. of CP1004 DC5V ? In playback, is the voltage at Replace IC1001.
  • Page 46 TROUBLESHOOTING GUIDE AUDIO CAN NOT BE RECORDED Is the voltage at pin 2 Check POWER BLOCK. Is BIAS waveform appeared ? of L4003 5V ? L4003 is broken or shorted. Check peripheral circuit. Is there AUDIO signal at Check the circuit between audio out of pins 78 or 80 of IC4001 ? Tuner and pins 78 or 80 of IC4001.
  • Page 47 TROUBLESHOOTING GUIDE CASSETTE CAN BE LOADED BUT UNIT HAS NO FUNCTIONS Does mode indicator Check LOADING MOTOR and the appear in Display ? peripheral parts. Does VCR operate with Check IC1001. the remote control ? Is the voltage at pin 6 of Check the circuit between pin 6 of CP354 when pressing the CP354 and pin 9 of IC1001.
  • 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 pins 34, jack to IC4001 and from Tuner Pack 36 or 38 of IC4001 ? to IC4001.
  • Page 49 TROUBLESHOOTING GUIDE NO E-E (NO VIDEO AND AUDIO FROM TUNER) Does J4201 have a Replace J4201. connection trouble ? Do the following voltages Check POWER BLOCK. appear on TU601, 30V at pin 9 and 5V at pin 7 ? Is there IF signal at pins Check CF601 and peripheral circuit.
  • 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 CP1004 about Replace CYLINDER MOTOR. DC1.3V ? In playback, is the voltage at pin Check R1020 and R1028.
  • Page 51 TROUBLESHOOTING GUIDE AUDIO SHAKES Replace AUDIO HEAD. Is AUDIO HEAD scratched ? Does pin 90 of IC1001 output a 3.0Vp-p square Replace CAPSTAN DD MOTOR. wave ? In playback, is the voltage at pin 4 of CP1004 2.8V ? Is the voltage at Check peripheral components pin 4 of CP1004 3.3V when you of IC1001.
  • Page 52 TROUBLESHOOTING GUIDE CASSETTE TAPE IS NOT ACCEPTED When cassette is not inserted, is the voltage Check EOT, BOT and Photo sensor. 1.6V at Emitter of Q102 and Q101 ? When a cassette is inserted, is the voltage Replace LOADING MOTOR. between pins 3 and 4 of CP1006 12V ? When a cassette is...
  • 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 3 of IC1001 LOW ? Check R1011 circuit.
  • Page 54 TROUBLESHOOTING GUIDE FF/REW DO NOT WORK When the FF (or REW) is When the FF (or REW) is pressed, does the FF (or Check pin 72 of IC1001 lines. pressed, does the voltage at REW) indicator appear on Replace IC1001. pin 11 of IC1001 change to screen ? high (low in REW) ?
  • Page 55 TROUBLESHOOTING GUIDE TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY Is the voltage at pin 2 of Check Power circuit. Does CYLINDER rotate ? CP1004, unregulated at 12V ? In playback, is the Is the voltage at pin 77 of voltage at pin 5 of IC1001 1.4V ? CP1004 1.3V ? Check R1028 and R1020.
  • 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 4Vp-p ? Is the voltage at pin 5 of CP1005 1.3V or Replace IC1001. When slowing CYLINDER, is the voltage about 5V ? Replace 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 79 of R1006.

  • Page 59: Ic Descriptions

    IC DESCRIPTION OEC7041A (IC1001) Pin No. Pin Name DESCRIPTION MSSEN-A Input terminal of mecha state sensor. MSSEN-B Tape end sensor input signal. Tape start sensor input signal. HI-FI-ENV Input terminal of HiFi RF envelope. VIDEO-ENV Input terminal of video RF envelope. AFT(MONI) Input terminal of AFT.
  • Page 60 IC DESCRIPTION OEC7041A (IC1001) Pin No. Pin Name DESCRIPTION OSC-OUT2 O Condenser connection for OSC-OUT2. Ground. CM_ADV_VIDEO I/O Not used. CM_ADV_AUDIO Not used. OSD-VSS Ground. TAB SW Input terminal for judge the tape if it has TAB or not. SERVICE Input terminal for Service Mode.
  • Page 61 IC DESCRIPTION OEC7041A (IC1001) Pin No. Pin Name DESCRIPTION AMP-VSS Ground. DRUM-FG Input terminal for drum rotation signal detection. DRUM-PG Input terminal for DRUM PG signal detection. AMP-VREFOUT O Condenser connection for AMP-VREFOUT. AMP-VREFIN Condenser connection for AMP-VREFIN. Condenser connection for C. CTL- I/O Input and output terminal of Control Head.

  • Page 62: Servo Timing Chart

    SERVO TIMING CHART IC1001 (OEC7041A) DPG ( 0 PIN DFG * 9 PIN H. SW. P CH 1 CH 2 ! 8 PIN V-SYNC (E-E) % 9 PIN REC CTL (REC) ( 7 PIN V-SYNC (TRICK PB) ! 3 PIN •...

  • Page 63: 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 64: Semiconductor Base Connections

    SEMICONDUCTOR BASE CONNECTIONS DIODE CATHODE CATHODE ANODE ANODE 1SS133T-77 11E1N-TA1B2 21DQ09N-TA2B1 SID1050CM EM-553-F1T HZ11B3L TD 11EQS04N-TA1B2 RM11C EQ-552-F1T HZ27-1L TD 11ES1N-TA1B2 RU2AM V1 HZ30-1L TD 1N4005E-G23 HZ6A3L TD RD12FB-T7 MTZJ5.1B T-77 RMPG06J MTZJ5.6B T-77 MTZJ6.8B T-77 MTZJ9.1B T-77 SB10-03A3 100PIN 8PIN 3PIN 7PIN...

  • Page 65: Y/C/Audio/Head Amp/In/Out

    TV BLOCK DIAGRAM V. OUTPUT IC401 LA7840 THERMAL R. SIGNAL PROTECTION G. SIGNAL PUMP B. SIGNAL COLOR SIGNAL LUMINANCE SIGNAL TUNER VIDEO SIGNAL AUDIO SIGNAL Q405 Q406 DEFLECTION SIGNAL H. DRIVE H. OUTPUT TUNER AUDIO SIGNAL X604 3.579545MHz CHROMA/IF FB401 IC604 LA76814BM Q608 BUFFER...
  • Page 66 Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM Q4010 BUFFER Y/C/A/H.AMP IC4001 LA71170M-MPB CP4001 SP CH1 (R) SP COM C COMB SP CH2 (L) BEFORE Y_DELAY COMB PB BGA 3 EP/LP CH1 (R) BEFORE 2 EP/LP COM CLAMP AFTER 1 EP/LP-CH2 (L) COMP Q4012 Y.N.R 320FH PB BGA...

  • Page 67: Micon/Power/Operation

    MICON/POWER/OPERATION BLOCK DIAGRAM TIMER SYSCON MICON SW1001 IC1001 OEC7041A SYSTEM RESET TAB SW IC1002 RESET-L 3 OUT PST600H POWER FAIL(DC) AT+5.6V POWER_FAIL_L P. CON 5V MSSEN-A X-OUT(12MHz) MS_SEN A Q1023 J701 X1001 Q1009 12MHz AUDIO L X_RAY_SW X-IN(12MHz) FRONT_AUDIO XC-OUT(32KHz) MSSEN-B X1002 FRONT_VIDEO...

  • Page 68: Printed Circuit Boards (Operation/Deck

    PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE W814 R763 W004 C353 C751 CD351_2 CD750 R772 W806 SW750 R351 SW797 SW796 SW794 R771 OS753 D791 D797 W002 R762 R766 SW792 SW793 R778 D796 D793 W807 W812 W804 R761 R754 W809 R773 R350 B701 D795 C781...

  • Page 69: Operation Schematic Diagram

    OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) FROM/TO I/O R766 CD750 (CP354) CH2B026A 100 1/2W REMOCON OUT Vout OS753 R778 R771 R772 R773 R774 AT+5V PIC-28143TH5 POWER ON L 1.5K 2.7K 5.6K OTPB/PLAY LED KEY A W804 T-REC LED REC LED KEY B ON TIMER LED R775 R776...

  • Page 70: Deck Schematic Diagram

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

  • Page 71: Printed Circuit Boards Syscon

    PRINTED CIRCUIT BOARDS SYSCON C4206 R4232 Q607 Q1006 Q4204 R1065 Q4210 Q1010 C1088 Q1008 R1064 Q1014 R1039 Q1012 R1038 Q4202 Q4207 Q4205 C657 R605 Q1017 Q1018 R603 C1007 Q4201 Q4206 C604 C1025 Q1002 R606 R1046 C658 R1066 R617 C622 C1074 Q1004 Q4212 R620...
  • Page 72 PRINTED CIRCUIT BOARDS SYSCON...
  • Page 73 PRINTED CIRCUIT BOARDS SYSCON C4206 R4232 Q607 Q1006 Q4204 R1065 Q4210 Q1010 C1088 Q1008 R1064 Q1014 R1039 Q1012 R1038 Q4202 Q4207 Q4205 C657 R605 Q1017 Q1018 R603 C1007 Q4201 Q4206 C604 C1025 Q1002 R606 R1046 C658 R1066 R617 C622 C1074 Q1004 Q4212 R620...

  • Page 74: Y/C/Audio/Head Amp Schematic Diagram

    Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) C4095 100P CH L4014 C4082 C4097 TP4001 68uH 18P CH FROM POWER 0.1 B P.CON+5V W813 C4079 R4005 Y/C_AUDIO C4055 0.1 B 1.5K R4067 L4006 6.3V C4078 C4001 FROM/TO I/O 120 1/4W 100uH 0.027 B FRONT_VIDEO 6.3V C4056...

  • Page 75: Micon Schematic Diagram

    TP1001 MICON SCHEMATIC DIAGRAM (SYSCON PCB) SERVICE FROM/TO POWER D1011 SB10-03A3 AT+5.6V C1082 R1032 D1006 SB10-03A3 P.CON+5V 0.01 B P.CON+12V POWER_FAIL[DC] C1041 VCR_POWER_H C1060 0.1 B R1059 CAP_HI_H 150P CH 4.7K INVERTER C1061 CAP_VCO R1029 Q1016 (S/S) 2SC2412K 150P CH C1055 4.7K 1/4W -0.7...

  • Page 76: Chroma/If Schematic Diagram

    CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO MICON X_RAY L607 C669 C671 47P CH 100uH 0.1 B VCR_POWER_H TV_POWER_H R675 W828 1K 1/4W OSD_R OSD_G BUFFER OSD_B Q602 BUFFER OSD_BLK 2SA1037AK TU_VIDEO Q608 2SA1037AK L613 AFT_M 47uH FROM/TO Y/C/A/H.AMP TRICK-PB-H C675 R621 C668 TU_VIDEO...

  • Page 77: In/Out Schematic Diagram

    IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) FROM CHROMA/IF B.OUT FROM/TO SOUND AMP SOUND_GND FROM/TO MICON SOUND+ ON_TIM_LED SP_OUT REC LED SW T-REC LED SW PLAY LED SW ON TIM LED SW OTPB LED SW PLAY_LED Q4205 Q4206 TV POWER SW Q4207 Q4201 Q4202 DTC114EKA...

  • Page 78: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) TO Y/C/A/H.AMP P.CON+5V D1010 C1004 25.1 P.CON 5V DRIVER DRIVER 1N4005E Q1019 Q1011 2SB1134R FROM/TO MICON 2SD2396 R1035 25.1 P.CON+5V DRIVER 1.8K CAP_VCO Q1010 DTA114EKA 23.6 AT+5.6V 12.1 FEED BACK FROM TV POWER R1065 P.CON+12V CAP_HI_H Q1012 Q1008...

  • Page 79: Sound Amp Schematic Diagram

    SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) SOUND AMP IC352 AN7523 CD353 FROM/TO I/O CH12437A SPEAKER CP353 B2B-EH-A SP_OUT SP OUT SOUND GND SOUND+ (S802) SP351 SOUND_GND 810-47-171 R358 CP352 CD354 B2B-EH-A CH12438A SPEAKER 100K SP OUT R357 MUTE SOUND GND Q352 47K 1/4W 2SC2412K...

  • Page 80: Printed Circuit Boards (Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT W014 W006 CP820 W047 HS503 C511_1 CP810 C520_1 CP804 R423 W012 W822 D536 S803X W817 IC505 W010 IC504 IC503 C537 R531 W027 S803Y W843 W823 D519 R519 C521 W816 W825 R460 R520 C519 C523_1 C527 C422_1 C438 W021 C516...

  • Page 81: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC401 LA7840 THERMAL PUMP UP PROTECTION 14.2 23.5 22.8 TO DY C412 500V 390P CP401 B05B-DVS C409 0.0022 M R404 R413 R416 3.3K FROM/TO CHROMA/IF CP820 (CD820) 8283_1112_00_000 SOUND GND SOUND+B CC004 HS401 TP-1S-05 VCR POWER_H 763WSA0004 TV POWER_H...

  • Page 82: Tv Power Schematic Diagram

    TV POWER SCHEMATIC DIAGRAM (MAIN PCB) TV.POWER_H P.CON+125V 5A 125V 2.5A 250V 4A 125V 3A 125V 127.0 127.5 D532 R531 CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, 127.0 +B 100V DRIVE 11E1N 100V DRIVE REPLACE ONLY WITH THE SAME TYPE FUSE 5A 125V 6V POWER REG Q503...

  • Page 83: Crt Schematic Diagram

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

  • Page 84: Interconnection Diagram

    INTERCONNECTION DIAGRAM J351 OPERATION PCB030 TEXA19 J701 Vout TM101 OS753 HALL MAIN ROTOR SENSOR COIL MAGNET FG SENSOR HALL HALL SWITCH LOGIC CP1004 SP351 SPEAKER CP353 SP OUT MOTOR GND SOUND GND I LIMIT CD353 SP352 SPEAKER CP352 CAPSTAN DD UNIT SP OUT CAP.M F/R DECK MECHA ASS’Y...

  • Page 85: Waveforms

    WAVEFORMS Y/C/AUDIO/HEAD AMP TV POWER 1 5.0V 0.1ms/div 50.0V 20µs/div 11 PB 0.5V 0.5ms/div DEFLECTION 2 2.0V 20µs/div 7 50.0V 20µs/div 12 PB 100mV 1ms/div DEFLECTION 3 0.5V 5ms/div 10.0V 5ms/div 13 PB 50mV 0.5ms/div TV POWER 4 200mV 20µs/div 9 20.0V 0.1ms/div 14 PB 0.5V 20µs/div...
  • Page 86 WAVEFORMS 16 REC 21 PB 26 POWER ON 100mV 20µs/div 1.0V 0.5ms/div 0.5V 10ms/div 17 POWER ON 22 PB 27 POWER ON 0.5V 1ms/div 1.0V 5ms/div 20.0V 20µs/div 18 POWER ON 23 PB 28 POWER ON 50mV 1ms/div 1.0V 5ms/div 5.0V 5ms/div MICON IN/OUT...

  • Page 87: Sound Amp

    WAVEFORMS CHROMA/IF SOUND AMP 31 POWER ON 36 POWER ON 0.5V 1ms/div 200mV 1ms/div 32 POWER ON 50mV 1ms/div 33 POWER ON 0.5V 20µs/div 34 POWER ON 200mV 20µs/div 35 POWER ON 10.5V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 88: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 V801 FB401 PCB070 (MAIN PCB) SP302 PCB030 (OPERATION PCB) SP301 K1-1...
  • Page 89 MECHANICAL EXPLODED VIEW TU601 PCB010 (SYSCON PCB) K1-2...

  • Page 90: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY S5-505-1C7-200 CABINET,FRONT ASS'Y ---- FELT SHEET ---- SHIELD,CASE HEAD AMP ASS'Y ---- LABEL,ENEGY STAR ---- PLATE,EARTH-SYSCON S2-A97-A40-770 WASHER 9.7x14xT0.7 S3-5WP-D06-800 BUTTON,REC S3-004-952-070 NUT 3/8 INCH ---- HEAT SINK ----...

  • Page 91: 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 92: 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 93: 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 A55002A420A 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 94: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION SYSCON PCB ASS'Y *** CAPACITORS *** *** RESISTORS *** C4071 87-015-695-080 CAP,E 1-50V C4073 87-010-549-010 CAP,E 47-6.3V R360 S3-118-A01-0J0 RES,M/O 1-2W C4076 87-015-677-010 CAP,E 100-6.3V R640 S4-X5T-647-2F0 RES,M 4.7K-1/6W C4078 87-010-549-010 CAP,E 47-6.3V...
  • Page 95 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** TRANSISTORS *** *** TUNER *** Q4007 89-324-122-080 TR,2SC2412KT ! TU601 S1-45K-000-500 TUNER,UHF-VHF TECC1040PG31 Q4009 89-324-122-080 TR,2SC2412KT Q4010 89-324-122-080 TR,2SC2412KT *** OTHERS *** Q4011 89-110-372-080 TR,2SA1037AK Q4012 89-110-372-080 TR,2SA1037AK CD604 S6-CH0-100-5A0...
  • Page 96 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION *** RESISTORS *** *** DIODES *** ! R505 87-022-448-090 RES,M/O 22K-3W D528 S9-4TA-6RA-130 ZENER,HZ6A3L TD ! R510 S3-U28-B1R-2J0 RES,M 1.2-3W D529 87-020-465-010 DIODE,1SS133T ! R512 S3-X18-127-3J0 RES,M 27K D530 S2-8T1-1E1-N10 DIODE,11E1N-TA1B2...
  • Page 97 ELECTRICAL REPLACEMENT PARTS LIST REF.NO. PART NO. DESCRIPTION *** RELAY *** ! RY501 S5-60Q-102-010 RELAY,SDT-S-109LMR *** OTHERS *** EL002 S2-412-030-1A0 EYE LET XRY20X30BD ! ICP502 S8-3PC-040-020 MICRO FUSE 251004 ! ICP503 S8-3PC-050-020 MICRO FUSE,251005 ! ICP504 S8-3PC-050-020 MICRO FUSE,251005 ! ICP505 S8-3PC-030-020 MICRO FUSE,251003 CRT PCB ASS'Y...
  • Page 98 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 737004 Printed in Singapore...

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