Aiwa VX-G142 Manuel de service

BASIC TAPE MECHANISM : OVD-5INTEGRATED COLOR TV/VIDEOCASSETTE RECORDERVX-G142S/M Code No. 09-995-325-3O1KSERVICE MANUALDATAGENERAL230V AC, 50Hz79W12.5

DISASSEMBLY INSTRUCTIONS2-11: CYLINDER UNIT (Refer to Fig. 2-11)Audio Control Head BaseAudio Control HeadSpringAudio Control HeadSpringAudio Control H

CHASSIS EXPLODED VIEW (BOTTOM VIEW)342M2001344346352351348349350347345366364365507515359517361362367368355356353354357357506504503358343369SW101502502

FRONT LOADING UNIT 9 EXPLODED VIEW421403420404407405401410408421416417406409419425402415412411411424422413414422423418M1-3

CHASSIS/FRONT LOADING UNIT 9 REPLACEMENT PARTS LISTREF. NO PARTS NO. DESCRIPTION Q'TY REF. NO PARTS NO. DESCRIPTION Q'TY# 301 S5-OP6-004-710

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTIONSYSCON PCB ASS'Y *** CAPACITORS ****** RESISTOR ***

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION*** TRANSISTORS *** *** COILS ***Q110 89-324-122-080 TR,

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION*** CONNECTOR *** *** CAPACITORS ***CY759 S6-9H1-302-090

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION*** TRANSISTORS *** *** DIODES ***Q513 SN-YTB-030-010 TR

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTION*** COILS ***L6002 87-003-152-010 COIL,100UHL6004 87-003-282-010 COIL,12UHL6005 S2-1LA-

920074Printed in Japan2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111

DISASSEMBLY INSTRUCTIONS2-14: MAIN CAM (Refer to Fig. 2-14)1.2.3.4.5.6.7.8.9.10.Remove the Loading Lever.Remove the Main Brake Lever.Remove the Capsta

3. REMOVAL OF ANODE CAPRead the following NOTED items before starting work.After turning the power off there might still be a potentialvoltage that is

ABCDEFGHA/CACCAEAFCAFTAFT DETAGCAMPANTA.PBAPCASS'YATAUTOA/VBGPBOTBPFBRAKE SOLBUFFB/WCCASECAPCARRCHCLKCLOCK (SY-SE)COMBCONVCPMCTLCYLCYL-MCYL SENSD

KEY TO ABBREVIATIONSSTUVXYSYNCSYNC SEPTRTRACTRICK PBTPUNREGVVCOVIFVPV.PBVRV.RECVSFVSRVSSV-SYNCVTX'TALY/CSynchronizationSync Separator, Separation

PREVENTIVE CHECKS AND SERVICE INTERVALSThe following standard table depends on environmental conditions and usage. Unless maintenance is properlycarri

NOTE FOR THE REPLACING OF MEMORY ICIf a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be

DECK PARTS LOCATIONS(TOP VIEW)1.2.3.4.5.6.7.8.9.10.11.Main ChassisTension Arm Ass'yEOT ReflectorGuide Roller S Ass'yP0 PostP1 PostFE HeadCyl

DECK PARTS LOCATIONS(BOTTOM VIEW)22.23.24.25.26.27.Worm Bracket F Ass'yMode SwitchWorm Ass'yWorm Bracket R Ass'yLoading Motor BeltCapst

SERVICING FIXTURES AND TOOLSJG022 Master Plane JG024 Reel Disk HeightAdjustment JigJG100A Torque Tape (VHT-063)JG153 X Value AdjustmentSc

TABLE OF CONTENTSSPECIFICATIONS ...

PREPARATION FOR SERVICINGHow to use the Servicing Fixture1.2.3.4.Unplug the connector CP301, CP353, CP810, CP820, CP850 and CP005, then remove the VCR

MECHANICAL ADJUSTMENTS1. CONFIRMATION AND ADJUSTMENT1.2.Turn on the power and set to the PLAY mode adjust theTension so that the Tension Post is at th

MECHANICAL ADJUSTMENTS1-4: CONFIRMATION OF FAST FORWARD TORQUE1.2.Set torque gauge (JG002G) on take-up reel disk, andplace unit in FAST FORWARD mode.

MECHANICAL ADJUSTMENTSMaximumMaximumEndingBeginningA:B=3:2BA2-2: CONFIRMATION AND ADJUSTMENT OF A/CHEAD TILTWhen the tape is running abnormally, perfo

MAJOR COMPONENTS LOCATION GUIDE(VCR SECTION)SYSCONTU6001CP6115IC4001IC103CP1002IC601TP4501IFIC6001CP6001L6012VR6001L6011CP4001TP4001TP4002TP1001D2-1

ELECTRICAL ADJUSTMENTS(VCR SECTION)3. ADJUSTMENT PROCEDURERead and perform these adjustments when repairing thecircuits or replacing electrical parts

100%45%ELECTRICAL ADJUSTMENTS39.5MHzFig. 3-33-4: COLOR LEVELCONDITIONSMODE-STOPINSTRUCTIONS1.2.Connect the oscilloscope to TP4501.When the Y-LEVEL is

MAJOR COMPONENTS LOCATION GUIDE(TV SECTION)MAINSCREEN VOLUMEFOCUS VOLUMEFB401T501CRTJ801TP801TP803VR502TP401D3-1

ELECTRICAL ADJUSTMENTS(TV SECTION)4. BASIC ADJUSTMENTSOn-Screen Display AdjustmentUnplug the AC plug for more than 30 minutes to set theclock to the n

ELECTRICAL ADJUSTMENTS4-5: VERTICAL POSITION (TV)1.2.3.4.Receive the color bar pattern (RF Input).Using the remote control, set the brightness andcont

SERVICING NOTICES ON CHECKING1. KEEP THE NOTICES2. AVOID AN ELECTRIC SHOCKAs for the places which need special attentions, they areindicated with the

ELECTRICAL ADJUSTMENTS4-15: SUB COLOR (TV)1.2.3.4.5.Receive the color bar pattern (RF Input).Connect the oscilloscope to TP801.Activate the adjustment

ELECTRICAL ADJUSTMENTS5.1.2.3.1.2.3.4.5.6.7.8.5-2: PURITYNOTE1.2.3.4.5.Fig. 5-1PURITY AND CONVERGENCEADJUSTMENTSNOTE5-1: STATIC CONVERGENCE (ROUGH AD

TROUBLESHOOTING GUIDEPOWER DOES NOT TURN ON (1)YesYes(TV SECTION)When turning on thePower Switch, does theLED light ?Is the voltage at pin 1of IC502 D

TROUBLESHOOTING GUIDEPOWER DOES NOT TURN ON (2)Is CP810 inserted ?Is the voltage at C507about 160V ?Insert CD810.Check the circuit betweenF501, C507 a

TROUBLESHOOTING GUIDEGOOD PICTURE BUT NO SOUNDReplace FUSE RESISTOR (R517).Check speaker andEARPHONE PCB.Check Sound +B line.Check Q351 and Q352.Check

TROUBLESHOOTING GUIDEYesYesYesNO PICTURECheck Q804, Q805, Q806 and CD850.Check Q602 and Video Out Line.Check IC601.Is the waveform at pin 47of IC601 n

TROUBLESHOOTING GUIDEYesAdjust the color.NoNoNoNoNoNoYesYesYesYesYesCheck J801 and CRT.Is the waveform at TP801,TP802 and TP803 of CRTPCB output.Is th

TROUBLESHOOTING GUIDEONLY A LINE APPEARSYesNoNoYesNoYesNoCheck pin 36 of IC101 and theperipheral circuit.YesNoYesCheck pins 18, 19 and 20 ofIC601 and

TROUBLESHOOTING GUIDEPLAY SHUTS OFFInsert a cassette and pushPLAY button.Check IC1001.Check TAPE LOADIG,LOADING BELT,MODE SWITCH, DD MOTOR and CYLINDE

TROUBLESHOOTING GUIDECYLINDER NOT ROTATINGDURING PLAYBACK ANDRECORDINGCheck UNREG 12V lineof Main PCB.Replace CYLINDER MOTOR.Check R1059, R1080 and R1

TTV-P16TTV-P7TTV-P2TTV-P1LTTV-P1TTV-N7ATTV-N2TTV-N1ETTV-N1NTSCNTSC, Color,1kHz, SPNTSC, Color,1kHz, EPNTSC, Color,1kHz, SPPAL, Color,1kHz, SPPAL, Colo

TROUBLESHOOTING GUIDEAUDIO SHAKESReplace AUDIO HEAD.Replace CAPSTAN DD.Check peripheral componentsof IC1001.Replace IC1001.YesNoYesNoYesNoYesNoNoYesIs

TROUBLESHOOTING GUIDEDoes WORM GEARof FRONT LOADINGUNIT activate ?Check WORM GEAR ofFRONT LOADING UNIT.Replace IC1001.Does 8 MHz Clockoscillate ?Check

TROUBLESHOOTING GUIDEYesYesYesWHEN INSERTING CASSETTE,IT EJECTS IMMEDIATELYNoNoNoNoCheck IC1001 circuit.Check FRONT LOADING GEARS.Defective CASSETTE o

TROUBLESHOOTING GUIDEYesYesYesNoNoNoCheck pin 74 of IC1001 lines changeIC1001.Check pin 12 of CP1002 andperipheal circuit.Check pin 45 of IC1001 lines

TROUBLESHOOTING GUIDETAPE LOADING IS OK, BUTUNLOADS IMMEDIATELYNoYesDoes CYLINDER rotate ?30 HzCheck REEL SENSOR.NoYesReplace IC1001.Check Power circu

TROUBLESHOOTING GUIDEPLAYBACK PICTURE JITTERSHORIZONTALLYReplace CYLINDER MOTOR.PLAYBACKPICTURE SHAKESReplace CYLINDER MOTOR.Replace CYLINDER MOTOR.No

TROUBLESHOOTING GUIDEAUTO TRACKING DOES NOTOPERATEReplace IC1001.Check IC4101 andCYLINDER UNIT.Check CONTROL HEAD.NoYesBy manual tracking,does the DC

TROUBLESHOOTING GUIDEWHEN PLAYBACK,FASTFORWARD OR REWIND MODE IS ACTIVATED, UNIT STOPSIMMEDIATELYRefer to section "CAPSTANDD MOTOR NOT ROTATING&q

TROUBLESHOOTING GUIDEPLAYBACK PICTURE JITTERS VERTICALLYYesNoCheck P/B ENVELOPE.NoAdjust GUIDE POST height.Adjust PG SHIFTER.NoDoes tracking noise app

TROUBLESHOOTING GUIDENO PLAYBACK PICTURE Check Power circuit.NoYesCheck 5V line.Check IC4101 and the connection of the CYLINDER.NoCheck Q4001,Q4016,Q

DISASSEMBLY INSTRUCTIONS1. REMOVAL OF MECHANICAL PARTSAND P.C. BOARDS1-1: BACK CABINET (Refer to Fig. 1-1)1.2.3.Remove the 4 screws 1.Remove the 2 sc

TROUBLESHOOTING GUIDENO COLOR DURING PLAYBACKNoYesNoCheck IC4101 and HEAD AMPBLOCK.Check C4067 and the peripheral circuit.Replace IC4002Does FM ENVELO

TROUBLESHOOTING GUIDEPLAYBACK PICTURE NOISY (EVEN AFTER CLEANING HEADS)Replace CYLINDER MOTOR.NoYesCheck Q4001,Q4016,Q4004 and the peripheral circui

TROUBLESHOOTING GUIDEYesYesYesNO COLOR DURING SELFRECORDING AND PLAYBACKDoes CHROMAsignal appear at pin 29of IC4001 ?NoNoNoNoReplace IC4101.Check IC41

TROUBLESHOOTING GUIDENO NORMAL AUDIOON PLAYBACKDoes audio appear on E-E ?NoIs the voltage at pin 17of IC5001 High ?NoNoDoes AUDIO signalappear at pin

TROUBLESHOOTING GUIDECAPSTAN DD MOTOR NOTROTATIONIn playback, is thevoltage at pin 13 ofCP1002 13V ?NoYesYesIs the voltage at pin15 of CP1002 5V ?In p

TROUBLESHOOTING GUIDEAUDIO CAN NOT BERECORDEDIs the voltage at pin 20of IC5001 9.2V ?Check POWER circuit.T5001 is broken or shorted.Check T5001 and pe

TROUBLESHOOTING GUIDECASSETTE IN AND DOWN,UNIT HAS NO FUNCTIONSNoYesYesNoCheck Operation PCB.Does VCR operate withthe remote control ?Check IC1001.Che

TROUBLESHOOTING GUIDENoYesYesIs there VIDEO signal atpin 6 of IC4002 andDoes VIDEO signal appear atpin 8 of IC4001 ?Does FM signal appearat pin 8 to C

TROUBLESHOOTING GUIDEYesYesYesYesNoNoNoNoNoYesNO E-E (NO VIDEO AND AUDIOFROM TUNER)Check Power PCB.Check TU6001 and the peripheralcircuit.Replace IC60

IC DESCRIPTIONSOEC6044DPin No. Pin Name I/O Description1 VSS — Ground.2 PAL/SEC O PAL/SECAM Selection.3 HALF TONE O HALF TONE terminal for T'TEXT

DISASSEMBLY INSTRUCTIONS1-4: LOCATION OF PRINTED CIRCUIT BOARDS(Refer to Fig. 1-4)CAUTION: BEFORE ATTEMPTING TO REMOVE ORREPAIR ANY PCB, UNPLUG THE P

IC DESCRIPTIONSOEC6044DPin No. Pin Name I/O Description51 REMOCON I Remocon pulse input.52 SD I SD signal input.53 TU MUTE O Tuner mute output.54 VCR

IC DESCRIPTIONSOEC9032BPin No. Pin Name I/O Description1 VSAD — Ground.2 BOT I Tape start sensor input signal.3 CASS DOWN/SERVICE I Input of CASS DOWN

IC DESCRIPTIONSOEC9032BPin No. Pin Name I/O Description51 CAP F/R OOutput the LOW signal while the capstan motor is rotation in thedirection of PB.52

IC DESCRIPTIONSTB1229CNPin No. Pin Name I/O Description1 AV VIDEO IN I Input for the External Composite Video signals.2 V-AGC — Control to keep the V-

IC1001 (OEC9032B)SERVO TIMING CHARTDRUMPG !3 PINDRUMFG !1 PINVIDEO H. SW#8 PINV-SYNC$2 PINPB CTL!9 PINCTL OUT*0 PIN6.5 H6.5 HRECPB30 Hz720 Hz30 Hz30 H

SW (0)SWITCH PATTERNMODE SEPARATIONMODE SWITCHSW 0SW 3 SW 1SW (1)SW (2)SW (3)SW 0SW 1SW 2SW 30100111010101010100100010011101100001100011010000010DECK

SEMICONDUCTOR BASE CONNECTIONSDIODE IC1SS133T-77 11E1N-TA1B2 10ELS6TA1B2 LFB-01L SLR-938C-4-AB EM-553-F9T 64PIN1SS290T-77 11E1TA1B2 15DF6-FC EQ-552F9T

TV BLOCK DIAGRAMTIMER MICONIC101 OEC6044DCRTX102 8MHzVT12AFT25TUNER MUTE53DV SYNC24SD52BUFFERQ6503,Q6502,Q6504AV-H21P.B.LED14KEY A26KEY B27REMOTE51VCR

Y/C/HEAD AMP BLOCK DIAGRAMINTPAL Y/C SIGNALPROCESSIC4001TA1232AN27222018161198652OSDPV/PHMAINEMPHEQRECFMMODRPRPFMAGCPBFMEQFMDEMODENT293031333844475153

SYSTEM CONTROL/OPERATION/POWER/IN/OUT BLOCK DIAGRAMQ1018SWQ1017V. REF CTLP. CON 5VCP100235716181920CYL DRIVECYL FGCYL PGFGV. REFAUDIO PBAUDIO RECY/C/H

DISASSEMBLY INSTRUCTIONS2.2-1: LINK GEAR (R) / CAM GEAR (Refer to Fig. 2-1)1.2.3.4.5.Unlock the support 1.Remove the BOT Sensor Cover and BOT Reflect

TUNER/AUDIO/IF BLOCK DIAGRAM24 3PBADI AUTOBIAS AC1REC235REC+-EQ782215REC+-REC141012LINE TUNERALCMUTE+-AUDIO REC/PB AMPIC5001LA7289AE/FE HEADAV SW AUDI

R754R774R773R780R772R771R777R776W804Q758Q756C751C779Q757SW791SW792SW793SW794SW795SW796SW797SW798SW799D793D791D794D792D795SW750SW751C781W001W002C755R76

CP4105CP4106CD4102CP4101_2W01L4101CP4102_1W02CP4103CP4104C4107W03W04W05W08W14W13L6012IC6001L6009CF6001VR6001L6010L6007JP6001C6002L6002L6011CF6003C6021

R754R774R773R780R772R771R777R776W804Q758Q756C751C779Q757SW791SW792SW793SW794SW795SW796SW797SW798SW799D793D791D794D792D795SW750SW751C781W001W002C755R76

ABC D E F GHABC D E F GH2134567821345678CY759ILG3P-S3L-PCB-S123CAUTION: DIGITAL TRANSISTOROF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICENOTE:THIS SC

ABC D E F GHABC D E F GH2134567821345678CYLINDER APC SIGNALCYLINDER AFC SIGNALAUDIO SIGNAL(PB)AUDIO SIGNAL(REC)PLAYBACK COLOR SIGNALRECORD COLOR SIGNA

ABC D E F GHABC D E F GH2134567821345678AUDIO SIGNAL(REC)TUNER VIDEO SIGNALCF6003SFE6.0MBCF6001TPS6.0MBCF6005-1CDSH6.0ME44KOUTOUTGININCF6004J1953M1234

C4007C4012_1C4036R4033C4029R4026C4055C4061C4064R4050R4059C4074C4067R4063C4049C4054C4060C4068C4011_1C4043C4058R4064W322R4030R4025R4029R4001R4018R4053R4

TU6001SW1010Q1053D1001CP1001CP1002CP4001IC4001W348R4015L4006C4062W395W397W326C4031C4027W325C4017W328C4014W321C4020W233C4044C4048X4001L4012W341W339L400

C4007C4012_1C4036R4033C4029R4026C4055C4061C4064R4050R4059C4074C4067R4063C4049C4054C4060C4068C4011_1C4043C4058R4064W322R4030R4025R4029R4001R4018R4053R4

DISASSEMBLY INSTRUCTIONS2-5: CASSETTE SIDE L (Refer to Fig. 2-5)1. Unlock the 2 supports 1.2. Remove the Cassette Side L.3. Remove the Pack Spring.4.

ABC D E F GHABC D E F GH2134567821345678PLAYBACK COLOR SIGNALRECORD COLOR SIGNALPLAYBACK LUMINANCE SIGNALRECORD LUMINANCE SIGNALTUNER VIDEO SIGNALCP40

ABC D E F GHABC D E F GH2134567821345678AUDIO SIGNAL(PB)AUDIO SIGNAL(REC)CYLINDER APC SIGNALCYLINDER AFC SIGNALCAPSTAN AFC SIGNALX10018MHzQ1010DTA124E

ABC D E F GHABC D E F GH2134567821345678AUDIO SIGNAL(PB)AUDIO SIGNAL(REC)RECORD COLOR SIGNALRECORD LUMINANCE SIGNALTUNER VIDEO SIGNALPF5001262300315.6

ABC D E F GHABC D E F GH2134567821345678AUDIO SIGNAL(REC)RECORD COLOR SIGNALRECORD LUMINANCE SIGNALTUNER VIDEO SIGNALCP810(CD810)8283_0812_00_00312345

ABC D E F GHABC D E F GH2134567821345678B.SIGNALG.SIGNALR.SIGNALTUNER VIDEO SIGNALX102EFOEC8004T4IC101 OEC6044DTIMER MICON110111213141516171819 220212

ABC D E F GHABC D E F GH2134567821345678IC601 TB1229CNVIDEO CHROMA DEFLECTION1 101112131415161718192 20 21 22 23 24 25 26 27 2829330313233343536373839

ABC D E F GHABC D E F GH2134567821345678AUDIO SIGNALCP353(CD353)8283_0312_00_00012321CD301C912398ASPEAKERSP352AA0308A8_OHMCP301TID-X02P-B212OF PRINTIN

ABC D E F GHABC D E F GH2134567821345678CY759ILG3P-S3L-PCB-S123CY757_1ILG8P-S3L-PCB-S12345678CY758_1ILG4P-S3L-PCB-S1234OF PRINTING AND SUBJECT TO CHAN

TM7379BTC7243BHEATERGNDGND180VC440CP401C418_2C416C417R456T401_1W028Q408Q404D422R476R477C482Q403C543_2R527_1R526_1D405D511R518R535C541R520Q502R521Q503C

ABC D E F GHABC D E F GH2134567821345678DEFLECTION SIGNALC431_122250VC48210010V YKC407100025V YKC40610035V VZC4221250V VZC405150VC4300.0012KV BPC4110.

Cam Pinch RollerCam P5Arm P5 Ass'yCassette OpenerPinch Roller323Polyslider Washer 5Spring Cam Pinch1DISASSEMBLY INSTRUCTIONSReel Disk SReel Disk

ABC D E F GHABC D E F GH2134567821345678B501BL01RN1-A63T6B502BL01RN1-A63T6B508BL01RN1-A63T6IC502NJM7805FD5V POWER REG123VR502470+B ADJQ5022SA1371100V

ABC D E F GHABC D E F GH2134567821345678B.SIGNALG.SIGNALR.SIGNALCP801(CD801)TS-80P-02-V112CP803B(CD803)51052-04001234TM101SBEQ20FJ801_1HPS3200-0105011

ABC D E F GHABC D E F GH2134567821345678AUDIO SIGNALOF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICENOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE T

ABC D E F GHABC D E F GH2134567821345678OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICETHE TIMETHIS INTERCONNECTION DIAGRAM IS THE LATEST ATNOTE:3213

The following waveforms were measured at the point of the correspondingballoon number in the schematic diagram.NOTE:REC200mV. 0.2U/div4 5 PB 5

5V. 500U/div33 REC/PB 500mV. 5V/div39 REC/PB 1V. 20U/div40 PB 500V. 0.1s/div4145 REC 500mV. 50V/divDEFLECTIONHEAD AMP2V. 5V/div345V. 20U/div

MECHANICAL EXPLODED VIEW217217217217144144144212L503222212222V801141139J801PCB110(CRT PCB)111154138205215136215215215205153146126127127128129149150131

MECHANICAL EXPLODED VIEW142145124125PCB330(HEAD AMP PCB)103107110106111PCB010(SYSCON PCB)205208208209209209210216216221218218219220PCB030(OPERATION 1

MECHANICAL REPLACEMENT PARTS LISTREF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY101 S5-191-1M7-200 CABINET,FRONT ASS&a

CHASSIS EXPLODED VIEW (TOP VIEW)513513514514504504301302303310512311312321316309304305316313319320503306308322M101503323504511324325329515327307326334