Aiwa HV-GX900 K Service Manual

BASIC TAPE MECHANISM : OVD-6VIDEO CASSETTE RECORDERHV-GX950HV-GX900S/M Code No. 09-975-331-5N1KKSERVICE MANUALDATA230 V AC, 50 Hz14W3.5 kg (7.7 lbs.)3

KEY TO ABBREVIATIONSABCDEFGHA/CACCAEAFCAFTAFT DETAGCAMPANTA.PBAPCASS'YATAUTOA/VBGPBOTBPFBRAKE SOLBUFFB/WCCASECAPCARRCHCLKCLOCK (SY-SE)COMBCONVCPM

KEY TO ABBREVIATIONSSTUVXYSYNCSYNC SEPTRTRACTRICK PBTPUNREGVVCOVIFVPV.PBVRV.RECVSFVSRVSSV-SYNCVTX'TALY/C:::::::::::::::::::::SynchronizationSync

SERVICE MODE LISTThis unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.Method OperationsPress both PLAY but

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

PREVENTIVE CHECKS AND SERVICE INTERVALSCLEANINGNOTEAfter cleaning the heads with isopropyl alcohol, do notrun a tape until the heads dry completely. I

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

(For 2 speed model)VHS Alignment TapeJG001CJG001DJG001V(TTV-P2)(TTV-P1L)(VP S-X6 )(For 1 speed model)VHS Alignment TapeJG001EJG001FJG001USERVICING F

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

MECHANICAL ADJUSTMENTS1. CONFIRMATION AND ADJUSTMENTRead the following NOTES before starting work.••Place an object which weighs between 450g~500g ont

MECHANICAL ADJUSTMENTS1-4: CONFIRMATION OF VSR TORQUEOperate within 4~5 seconds after the reel disk begins toturn.Install the Torque Gauge (JG002F) an

SPECIFICATIONS ...

MECHANICAL ADJUSTMENTS2-3:2-2:When the Tape Running Mechanism does not work well,adjust the following items.CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTR

MECHANICAL ADJUSTMENTS3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE1234567891110127.8.9.10.11.12.P4 PostT Brake SpringT Reel Ass'yIdler Ass'y

ELECTRICAL ADJUSTMENTSCAUTIONWhen replacing IC's or transistors, use only specifiedsilicon grease (YG6260M).(To prevent the damage to IC's a

ELECTRICAL ADJUSTMENTS2. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDESYSCON PCBT501J4501TP4002TP4001TU6001TP1002TP1001D2-2

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDENo YesYesNoPOWER DOES NOT TURN ONDoes DISPLAY light ?Is F501 broken ?NoYesIs the voltage at collector of Q50

TROUBLESHOOTING GUIDEYesNoYesNoYesDoes it Power offintermittently ?Does it Power off in about3 seconds ?Does it Power off in about6 seconds ?POWER SHU

TROUBLESHOOTING GUIDECYLINDER NOT ROTATINGDURING PLAYBACK ANDRECORDINGNoNoYesYesCheck AT 12.6V line ofPOWER BLOCK.Is the voltage at pin 2 ofCP1002 abo

TROUBLESHOOTING GUIDEAUDIO SHAKESReplace CAPSTAN DD UNIT.Is AUDIO HEAD scratched ?NoYesYesNoNoYesReplace AUDIO HEAD.Check IC1002.Is input level at pin

TROUBLESHOOTING GUIDECASSETTE TAPE ISNOT ACCEPTEDNoYesNoYesYesNoNoYesWhen a cassette is inserted,is the voltage at pin 4 ofIC1002 0V ?When a cassette

TROUBLESHOOTING GUIDEWHEN INSERTING CASSETTE,IT EJECTS IMMEDIATELYNoYesNoYesWhen cassette is inserted,is the voltage at pins 3 and4 of IC1002 0V ?Does

SERVICING NOTICES ON CHECKING1. KEEP THE NOTICESAs for the places which need special attentions, they areindicated with the labels or seals on the cab

TROUBLESHOOTING GUIDEYesNoIs the voltage changing atpin 11 of IC1002 whenyou press FF/REW ?FF/REW DO NOT WORKCheck DECK MECHANISM.Check pins 9 and 10

TROUBLESHOOTING GUIDEDoes CYLINDERrotate ?Replace CYLINDER UNIT.In playback, is thevoltage at pin 5of CP1002 1.5V ?Check Power circuit.No NoYesYesNoYe

TROUBLESHOOTING GUIDEReplace CYLINDER MOTOR.PLAYBACK PICTURE SHAKESReplace IC1002.Replace CYLINDER MOTOR.NoNoYesYesReplace CYLINDER MOTOR.Is the volta

TROUBLESHOOTING GUIDEAUTO TRACKING DOESNOT OPERATEReplace IC1002.Check CONTROL HEAD.NoYesNoYesNoYesBy manual tracking,does the DC level at pin 84of IC

TROUBLESHOOTING GUIDEDoes CAPSTAN DDMOTOR rotate ?WHEN IN PLAYBACK, FASTFORWARD OR REWIND MODEIS ACTIVATED, UNIT STOPSIMMEDIATELYNoYesNoRefer to secti

TROUBLESHOOTING GUIDEPLAYBACK PICTURE JITTERSVERTICALLYReplace IC1002.NoIs PG SHIFTERadjustment 6.5H ?Adjust PG SHIFTER.Check P/B ENVELOPE.NoNoYesYesN

TROUBLESHOOTING GUIDENO PLAYBACK PICTURENoIs E-E appearing onthe Monitor TV ?Check Power circuit.NoYesYesNoYesNoYesCheck IC4801.Is the voltage at pins

TROUBLESHOOTING GUIDENO COLOR DURINGPLAYBACKCheck Q4802 circuit.NoYesReplace IC4001.Does COMPOSITEsignal appear at pin 2of IC4001?E-14

TROUBLESHOOTING GUIDEPLAYBACK PICTURE IS NOISY(EVEN AFTER CLEANING HEADS)Is FM signal at pin 79of IC4001 250mVp-p ?NoYesNoYesCheck CYLINDER UNIT.Repla

TROUBLESHOOTING GUIDEReplace J4501.Check VIDEO input circuit.NoYesYesNO COLOR DURING SELFRECORDING AND PLAYBACKNoDoes color signal atpin 52 of IC4001

DISASSEMBLY INSTRUCTIONS1. REMOVAL OF MECHANICAL PARTSAND P.C. BOARDS1-1: TOP CABINET, FRONT CABINET ANDOPERATION 1, 2 PCB (Refer to Fig. 1-1)1.2.3.4.

TROUBLESHOOTING GUIDEYesNoNO NORMAL AUDIOON PLAYBACKNoRefer to section "NO E-E"YesDoes audio appearon E-E ?Does AUDIO signal appear atpin 2

TROUBLESHOOTING GUIDECAPSTAN DD MOTORNOT ROTATINGNoYesCheck POWER circuit.NoYesNoYesReplace IC1002.Is the voltage at pin 8of CP1003 5V ?In playback, c

TROUBLESHOOTING GUIDEAUDIO CAN NOT BERECORDEDCheck POWER circuit.L4005 is broken or shorted.Check pin 29 of IC1002.YesNoYesYesNoIs BIAS level O.Kat L4

TROUBLESHOOTING GUIDENoCheck IC1002.Does mode indicatorappear in Display?Does VCR operate withthe remote control?Check Operation PCB.YesYesNoCASSETTE

TROUBLESHOOTING GUIDERECORDING MECHANISMWORKS, BUT NO VIDEORECORDED FROMINPUT JACK OR TUNERYesNoCheck the circuit from VIDEOinput jack to IC4001, from

TROUBLESHOOTING GUIDENO E-E(VIDEO ANDAUDIO FROM TUNER)YesNoNoYesCHECK AUDIOCHECK VIDEONoYesNoYesReplace TU6001.Is there VIDEOwaveform at emitterof Q60

TROUBLESHOOTING GUIDENoYesNoYesNO E-E AUDIO (MONO)Check J4501 and peripheralcircuit.Check POWER BLOCK.Does AUDIO signalappear at pin 9 ofIC4001 ?Is th

IC DESCRIPTIONSOEC7035APin No. Pin Name I/O Description1 AFT-SC I AFT S Curve input for tuner.2 AGC-DET I Input of CASS DOWN, TAB switch and setting

IC DESCRIPTIONSOEC7035APin No. Pin Name I/O Description51 POWER ON L O For control the user power switch ON/OFF.52 NC O Not used.53 ONE TOUCH PB O Con

SERVO TIMING CHARTIC1001 (OEC7035A)DPG *6 PINDFG *7 PINH. SW. P!8 PINCH 1CH 2V-SYNC (E-E)*4 PINREC CTL (REC)(7 PINV-SYNC (TRICK PB)!3 PIN• WAVEFORM CH

DISASSEMBLY INSTRUCTIONS2. REMOVAL OF DECK PARTS2-1: TOP BRACKET (Refer to Fig. 2-1)Remove the 2 screws 1.Slide the 2 supports 2 and remove the Top Br

LIGHTGUARDLIGHTRECEIVINGSYSTEM SWITCH MODEEOTBOTMSSEN AMSSEN BPB SLOW : SETTING SPEED TO SERVOFWDRVSEJECTIONUNLOADINGLOADING ARMPINCH ROLLERLOAD

Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM(MODEL:HV-GX900K)234SP-CH2(L)SP-COMSP-CH1(R)CP4001CYL798687888978H.AMP7573 X40014.433619MHzIIC_CLKIIC_DATAV.H_SW626381

SYSTEM CONTROL/SERVO/TIMER BLOCK DIAGRAM(MODEL:HV-GX900K)234BOTLDM -LDM +CP1004DECK822027POWER_FAILPOWER_ON-HCAP_HI-H4344748POWERP.FAILPOWER ON-H ACAP

NORMAL_A_INNORMAL_A_OUTTU_A_OUTY/C/AUDIO/HEAD AMP1263J4501Q4802BUFFERQ4801DC CLAMP2OSDIC4801OEC3031A1813TUNER/HIFI/21PIN/OSD/VPS BLOCK DIAGRAM(MODEL:H

POWER BLOCK DIAGRAM(MODEL:HV-GX900K/HV-GX950K)OPERATION BLOCK DIAGRAM(MODEL:HV-GX900K/HV-GX950K)V651 SVV-07SS22HEATER_DC +HEATER_DC -26 25 2 11OS651

Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM(MODEL:HV-GX950K)234SP-CH2(L)SP COMSP-CH1(R)CP4001CYL798687888978H.AMP7573X40014.433619MHzIIC_CLKIIC_DATAV.H_SW6263818

SYSTEM CONTROL/SERVO/TIMER BLOCK DIAGRAM(MODEL:HV-GX950K)234BOTLDM -LDM +CP1004DECK822027POWER_FAILPOWER_ON-HCAP_HI-H4344748POWERP.FAILCAP_HI-HRESET1S

TUNER/HIFI/21PIN/OSD/VPS BLOCK DIAGRAM(MODEL:HV-GX950K)NORMAL_A_INNORMAL_A _OUTY/C/AUDIO/HEAD AMPQ4802BUFFERQ4801DC CLAMP2OSDIC4801LC74775M21 1953TU60

SW605SW604SW601SW603SW602SW606CD601R601R603R602R604R605R606SW608SW607SW610SW609D601Q601C601R609R608CD602R607CP101Q101 Q102CP102PRINTED CIRCUIT BOARDS(

ABC D E F GHABC D E F GH2134567821345678R6013.3KR6046.8KR6033.9KR6022.7KR60513KR6061.5KR607220R6092.7KR6083.3KSW601SKQNAED010STOP/EJECTSW602SKQNAED010

DISASSEMBLY INSTRUCTIONS2-6: LINK ASS'Y (Refer to Fig. 2-6)Set the Link Ass'y to the Eject position.Remove the (A) side of the Link Ass&apos

ABC D E F GHABC D E F GH2134567821345678DESCRIBED IN PARTS LIST ONLYCRITICAL FOR SAFETY,USE ONESARESINCE THESE PARTS MARKED BYCAUTION:DURING PLAYBACKM

0R515R514C514Q503C4519 C4515C4518R4529C6010C6011Q6003R6014Q502Q509R534R652C657IC651C656C658R539C4023R4016R4015Q4005R4029R4022R4020R4013R4012R4011C4034

D1001CP1003SW1001CP4003Q1004Q1005Q1002Q1001R508C506Q501D507IC501R513D501R501R502C508R503R505C505D505D503D504D502C507FH502 FH501C503B501C502C512IC502R5

0R515R514C514Q503C4519 C4515C4518R4529C6010C6011Q6003R6014Q502Q509R534R652C657IC651C656C658R539C4023R4016R4015Q4005R4029R4022R4020R4013R4012R4011C4034

ABC D E F GHABC D E F GH2134567821345678L4013100uHL4015100uHL4003100uHL40061mHL400410uH0405L4009100uHQ4008DTC144EKAV.AGC SWTP4002V.ENVTP4001H.SWW801W8

ABC D E F GHABC D E F GH2134567821345678IS NON POLAR ONE.THE ALUMI ELECTROLYTIC CAPACITOR MARKED NPTHE RESISTOR MARKED F IS FUSE RESISTOR.NOTE:D1003RD

ABC D E F GHABC D E F GH2134567821345678IC4801 OEC3031AOSD1 10111213141516171819220212223243456789J4501_10350_9982_05110111213141516171819220213456789

ABC D E F GHABC D E F GH2134567821345678TU6001MRF11-UB511101112131415161718192202122232425 2627 283456789DESCRIBED IN PARTS LIST ONLYCRITICAL FOR SAFE

ABC D E F GHABC D E F GH2134567821345678IS NON POLAR ONE.THE ALUMI ELECTROLYTIC CAPACITOR MARKED NPTHE RESISTOR MARKED F IS FUSE RESISTOR.NOTE:F501T1.

ABC D E F GHABC D E F GH2134567821345678VoutB+GNDOS651PNA4612M00YB123CP651_1(CD601)8283_0312_00_000123V651 SVV-07SS22110111213141516171819 22021222325

DISASSEMBLY INSTRUCTIONS2-11: S REEL/T REEL ASS'Y (Refer to Fig. 2-11)Remove the Idler Ass'y.Remove the S Reel and T Reel Ass'y.Remove

ABC D E F GHABC D E F GH213456782134567821CD501AC230V50Hz11011121314151617181922021 3456789DESCRIBED IN PARTS LIST ONLYCRITICAL FOR SAFETY,USE ONESARE

0R515R514C514Q503R4526Q4505R4514C4519 C4515R4511C4518R4524R4520Q4506R4529C6010C6011Q6003Q6001R6011R6016C6021R6014Q502Q509R534R652C657IC651C656C658R539

D1001CP1003SW1001CP4003Q1004Q1005Q1002Q1001R508C506Q501D507IC501R513D501R501R502C508R503R505C505D505D503D504D502C507FH502 FH501C503B501C502C512IC502R5

0R515R514C514Q503R4526Q4505R4514C4519 C4515R4511C4518R4524R4520Q4506R4529C6010C6011Q6003Q6001R6011R6016C6021R6014Q502Q509R534R652C657IC651C656C658R539

ABC D E F GHABC D E F GH2134567821345678L4013100uHL4015100uHL4003100uHL40061mHL400410uH0405L4009100uHQ4008DTC144EKAV.AGC SWTP4002V.ENVTP4001H.SWW801W8

ABC D E F GHABC D E F GH2134567821345678IS NON POLAR ONE.THE ALUMI ELECTROLYTIC CAPACITOR MARKED NPTHE RESISTOR MARKED F IS FUSE RESISTOR.NOTE:D1003RD

ABC D E F GHABC D E F GH2134567821345678J4501035_0_8083_00110111213141516171819220212223242526272829330313233343536373839440414256789IC4801_1 LC74775M

ABC D E F GHABC D E F GH2134567821345678TU6001MRF11-UB511101112131415161718192202122232425 2627 283456789DESCRIBED IN PARTS LIST ONLYCRITICAL FOR SAFE

ABC D E F GHABC D E F GH2134567821345678IS NON POLAR ONE.THE ALUMI ELECTROLYTIC CAPACITOR MARKED NPTHE RESISTOR MARKED F IS FUSE RESISTOR.NOTE:F501T1.

ABC D E F GHABC D E F GH213456782134567821CD501AC230V50HzDESCRIBED IN PARTS LIST ONLYCRITICAL FOR SAFETY,USE ONESARESINCE THESE PARTS MARKED BYCAUTION

DISASSEMBLY INSTRUCTIONS123E-RingMiddle GearMain CamPinch Roller CamLink Lever SpacerJoint GearP5 CamFig. 2-17-ANOTEWhen you install the Pinch Roller

SEMICONDUCTOR BASE CONNECTIONS(MODEL:HV-GX900K) (MODEL:HV-GX950K)DIODE DIODE11DF2N-TA2B2 11ES1N-TA1B2 1SS244T-77 SID1050CM SLZ-345B-02-T1 11DF2N-TA2B2

WAVEFORMS61 114 9105The following waveforms were measured at the point of the correspondingballoon number in the schematic diagram.NOTE:3 138REC, PB1V

MECHANICAL EXPLODED VIEW701701701703624702702702702608609612704PCB010(SYSCON PCB ASS'Y)TU6001603607610603602704623625707706626706(HV-GX950K)705PC

MECHANICAL REPLACEMENT PARTS LISTREF. NO. PART NO. DESCRIPTION Q'TY601 S4-D10-5B7-200 CAB,FRONT ASS'Y(HV-GX900K) 1S4-D10-6B7-200 CAB,FRONT A

PART NO.CLASSMARKGREASEG-555GAAG-488MABKYODO OIL SLIDAS No. 150BAOILFL-721ACApplying positions AA, AB, AC and BA for the grease or oil are displayed f

CHASSIS EXPLODED VIEW (BOTTOM VIEW)AB302M2001511340514341510343511503345339342322350513307354326327325504337332346311333346312331514344512330AAAAAAAAA

CHASSIS REPLACEMENT PARTS LISTREF. NO. PART NO. DESCRIPTION Q'TY REF. NO. PART NO. DESCRIPTION Q'TY301 S5-OA5-000-220 AHC ASS'Y 1 360 S

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

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION*** ICS *** *** COILS *** ! IC501 87-A21-186-010 IC,STR

ELECTRICAL REPLACEMENT PARTS LISTREF.NO. PART NO. DESCRIPTIONOPERATION 1 PCB ASS'Y*** SWITCHES ***SW601 S5-042-01T-320 SW,TACTSW602 S5-042-01T-

DISASSEMBLY INSTRUCTIONS2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A)Remove the E-Ring 1 and remove the Main LoadingGear.Remove the Capstan

920074Printed in Singapore2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111