JVC PC-V77, Service Manual

Page 1: ...s 4 Adjustment 7 Block Diagram 12 Wiring Connections 14 Standard Schematic Diagram 15 Location of P C Board Parts and Parts List Tuner P C Board Parts 20 DIN Board 23 Page Main P C Boad parts 24 DTS P C Board parts 2B Exploded View of Speaker Box and Parts List 29 jQ Exploded View of Mechanism Assembly 30 Mechanism Component Parts List 31 ill Exploded View of Enclosure Assembly 32 Enclosure Assemb...

Page 2: ...ature part mov ing parts and or sharp edges for the prevention of elec tric shock and fire hazard When service is required the original lead routing and dress should be observed and they should be confirm ed to be returned to normal after re assembling 5 Leakage current check Safety for electrical shock hazard A fter re assembling the product always perform an isola tion check on the exposed metal...

Page 3: ...J C cO C et C N D P t j hj 0 M M j M 0 H n M S t j H Z hj 0 Location of Main Parts Main Board Ass V Speaker Terminal Switch SEA Cover Power Transformer Fig 2 1 AMP SEA Board Ass V CD Jack Ass v INo 1740 3 ...

Page 4: ...he volume knob 3 Remove the Function Tape switch knob 4 Pull and remove the SEA volume cover 5 Remove the five screws and securing the board ass y and 3D speaker ass y 6 Pull the entire ass y slightly then remove the head wire motor tuner etc Tuner board ass y 1 Remove the wire connector for the tuner board 2 Pull out the board ass y Mechanism ass y 1 Remove the six screws j 2 Open the cassette do...

Page 5: ...j t u u v Free se e manuals 3 Gralis schema s 5 Digil izcd hy frccscrviccmanuals info Fig 3 6 Motor bracket Recording playback deck 1 Remove the three screws G 2 Remove the chassis and M bracket from the button side Then remove the bracket arm panel The synchro arm can be removed from the pause lock Return the pause lock after it is removed from the pro per position Head section 1 Remove the recor...

Page 6: ...ywheel Remove the C washer securing the gear For reassembly insert the Sensing Lever arm stand into the section Lock arm Press the arm stopper from window and pull to remove Chassis removal 1 Remove the three 0 and Cl springs 2 Remove the two screws 0 3 Remove the two screws securing the capstan metal 4 Gently remove the button ass y from the chassis 6 INo 1740 Fig 3 9 Flywheel Fig 3 10 Fig 3 11 F...

Page 7: ...A 0 40 JIS RMS or less VTT724 Adjust VR10l VR102 deck A and VR201 1 kHz VR202 deck B so that the output of TP151 TP251 and TP751 are 21 dBm VTT739 With respect to their outputs at 1 kHz the out puts at TP151 and TP251 should be 5 3 dB at 63 Hz and 1 3 d8 at 10kHz TS 8 Set beat cut switch S721 to position 1 and ad Normal tape just the oscillating frequency of C724 to 68 1 kHz with L721 Connect a 10...

Page 8: ...225c o B 0 BIAS FREOUENCY Adj VRI22 L721 Fig 4 1 DC 12V AC 120V 50 mW 0 55 V 6 11 400 Hz 30 Description DC 7 V When the power is supplied directly to the tuner in the receiver the voltage should be adjusted to the proper level which shall be required by the tuner RADIO AM Minimum gain position Center position Near the minimum capacity position where no signal come in 1 2 Connection of Sweeper and ...

Page 9: ...nced S curve waveform 3 AM RF ALIGNMENT 3 1 Conditions of the receiver 1 Power source Same as mentioned in item 1 1 2 Function switch position RA DIO 3 Volume control 50mW 4 SEA control Center position 5 Variable capacitor Refer the following list shown in item 3 4 3 2 Conditions of SSG 1 Modulation Refer the basic condition 2 Frequency Refer the following list shown in item 3 4 3 Output level of ...

Page 10: ...side to TP2 2 Tuner output Positive side to 4 4 Alignment Band Select Sort of Antenna to be Frequency of SSG Aligning Switch Position attached to SSG Preset Memory No Position 1 108 MHz M5 L1 2 FM Dummy Adjust L1 until the voltage of TP9 becomes 4 4 0 05 V 3 Antenna 4 88 MHz to be received 90 MHz M2 L2 5 108 MHz to be received 108 MHz M4 TC 2 6 Adjust the above aligning position L2 TC 2 repeatedly...

Page 11: ... after passing through the DOlBY rlter l rree service manuals Gratis schema s Parts Arrangement for Alignment Digitized oy DTS Board L C 0 CN2 I TP8 J 0 DOWN VRI FM CNI 0 BAND MI M2 L3 MWl BAND SELECT 1FM FM2 FM3 AM Fig 4 2 Pattern side www rrcc lcrviccmanuals info Tuner Board T2 lAM IF I D IC 2 5 CN3 MPXI BAR AN T T I IFM IFI o IC I L1 IFM OSCI D D TP 2 o L2 1 FM RF I D o TP I TC2 1 FM RrP D LS M...

Page 12: ... hj o PC V77 A B E G U v Block Diagram Tuner ROD ANT FM fRONT END Fig 5 Amplifier DIN Ar 4P REC PB GlV vERSION FROM TUNER o _f1 CO IN __ _ M le AMP Fig 5 2 12 No 1740 BAND SELECTOR SAND SWITCH MW l LEVEl f W H LEVEl JACK O SPEAKER OUI 0 0 SPEAKER ...

Page 13: ...Z ON STEREO ON M5 M4 M3 M2 Ml MANUDOWN MANU UP UPD 1708 G 624 OUT CLOCK I 1 0 IIII 1 C zn I D ZOnI r l w N N o 1 r n o z 1 r n 0 00 0 v v n n Z Z o en S0 1 0J nO U In Z 1 ID r In 1 h 8 CD j IO I On N N o NI I 0 So wO Gl o I I og IQ 11 eil OJ r r l J J W ID EO 11 Cl tI I l w tI I N r r tJ Cl I iD m Gi C ...

Page 14: ...d I Deck A I Mute Swi t ch PC V77 A B E G UN Amp Board Motor Q S I Fig 6 1 No 17401 14 D T S Boa rd t Board Batt Contac r I T Antenna OIl To LCD Case 0 I Tuner Board Spea ker Color codes are shown below Brown Red 2 Orange 3 Yellow 4 5 6 Green Blue Violet 7 Gray 8 White 9 Black 0 Pink D Light Blue C ...

Page 15: ...OOI 028 FM 83 I C7 7 MW LW n 0 Cl 05 L r I I I _J 8 11 T TTJJ JJJ J r J I I I I I 1 IC I IC2 IC51 Leo VG110 S 002 OSOI asot AS12 2 21 aS020SOJ IAcnVE LPF I r O 6 11 552 M2 8LAt IK NO 9 551 558 OSPOJOI CI02M J 557 8 c VMW224 i 31 6 16 9 5 CF1 CF2ANDCFl CONSTITUtE C fiLTER KIT NUMaEREO FFK23A l5 PC V77 A B E G Uiv 10 11 18 118 18 18 Blue line shows the signal at playback B line parts are safety assu...

Page 16: ...79M 1600 211 6T8 115 1 D 1 D 0 0501 OSOJ IACilvE lPF I r I I I J 11 552 Ii M2 9 SSI 558 QSP JOH 02 NO I I I VOl T t6ES 4AE oc MEASURED WiTH A DIGITAL oOLT METER 2 UNLESS OTHERWISE SPECIFIED ALL RESI oTOAS ARE 1 6W 5 4 CARBON RESISTOR VMW12t 9 ALL RESISTAACE 1lAL00S ARE IN Otit l COl ALL CAPAC1TAN E VAlUES ARE N F cP pF ALL E CAPIlCIT RS ARE SHOWN IN THE FORM OF CAPAC l ANCE F I RATEO VOLTAGE IY IS...

Page 17: ...o c o E F Amplifier Circuit A U Version 4 5 6 7 CD IN Fig 7 3 8 Blue line shows the signal at playback Red line shows the signal at recording B line 9 PC V77 A B E G UN 10 Parts are safety assurance parts When replacing those parts make sure to use the specified one INo 1740 17 ...

Page 18: ...r Z lhS Tl ISA 250V I I I _J T999 VTP57P2 12E m OMCOlfiNXl2 I seo m IOSTM 01 VO SHORT I rFF L __ t JNOTES __ _ __ _ 1 VOLTAGES ARE DC MfA9 AED WITH A DIGITAL I T METER WITHOUT lHPVT SIGNAl l C 2 11 C H ITICiN A PLAY NORMAl PC V77E PC V178 SHORT S_ OMF 1A2_JR1S OIo4FSEI JAISBS nl f J25OV TJ ISAI2SOY Vn S1f 2 12F VTPS7P2 I2FBS 0HC0 62 02 C0361 002BS DSA AI OMAl221 OO4 SHORT A lBPUY 2 LN ES5 OfHERWlS...

Page 19: ... S Q 3 2 s VJ c 8 g g 0 3 3 ROO9 tlS Cl c tDa n _ J n en CD I C r r o 0 10k o 0 0 0 0 u IJ IJ RD17 1 2V l 1 M C1l r r o 4 2V 8I RDll cc cc 06 f 0001 V 470 g 5 u C 0 0 a l n C r NOTE I I I I 1 VOLTAGE VALUES ARE MEASURED WITH NO SIGNAL BY USING DIGITAL VOLTMETER IN PLAYBACK MODE AC 220V 2 REGARDING THE RESISTOR WITH OUT SPECIAL INSTRUCTION USE 1 6W RESISTOR 3 UNITS OF CAPACITANCE VALUES SHOULD BE R...

Page 20: ... E R17 R20 TC5 I I D6 I I I I I 11 Cl RI C7 u M N R2 0 B u 13 02 I I I I 1111 EJ 1 5 3 1 1 C20 u R5 C17 B 01 E I 11 I F I B E C58 02 I I I I _ 01 u a R21 _ l 1 M C13 C15 er 1 o _ R 5 u z t B Ll lJE u CF2 R23 15 Q9 B I I I lE C37 L7 C22 R S BI I I lE H 01 llTr 181 IQ CF3 N w _ R O C O Ol I u C39 B iT I iE _ 1 I w _ 013 0 I f 1 w E R27 c J R28 R29 VRl C36 C55 I I R38 CNl I 11 I Fig 8 1 I C 5 C 6 1 R...

Page 21: ...L003 VQB010B SOl BAR ANTENA L004 VQB010B S01 BAR ANTENA LOOS VQM7U02 401 DSC COIL MWl PC V77 A B E G UN parts are safety assurance parts When replacing those parts make sure to use the specified one REF NO PAR TS NO P ARTS NA ME L006 VQL7U02 S01 DSC COIL LWl L007 VQP0012 8R2 INDUCTOR L008 V03047 17 COIL QOOl 2SC1923 OlE2 TRANSISTOR r_L QOO_ 2 ___ 2 _ S_C_ 3_9_ E AC TR 7 t Q003 2SC2839 ElAC TR tO Q...

Page 22: ... 03 1 g t j U Q I 5 L J 1111 I11 RSO IG13 I lel I I B 01 5 E R48 i I I I lE I I I 1 I r DB 1 14 1 L 8 B E 1 D02 I I I I _ 01 U er 1 C13 C1S erl I R4S z I C60 U CF2 I 1 L c _ Jl Q9 B I I I lE U C37 L7 I nI I iIr tol iQ CF3 w R40 cro 21 BiT I IL CD _ 1 u 1 C3 42 _ 013 0 1 _CD U o R26 1 w R27 00 J R28 R29 A VRl C36 1 R38 o r 1I I U U 1 I N I I C46 tl 1 R31_ j OS C45 BI I I I R33 C48 R36 CNl C57 013 F...

Page 23: ...RD161J l04Y CARBON RESISTOR R002 QRD161J l03Y CARBON RESISTOR R003 QRD161J 100Y CARBON RESISTOR R004 QRD161J l02Y CARBON RESISTOR ROOS QRD161J 823Y CARBON RESISTOR R006 QRD161J l02Y CARBON RESISTOR ROOB QRD161J 820Y CARBON RESISTOR QRl i16iJ fo2 Y CARBONRESTsTOR R009 R010 RD161J l04Y CARBON RESISTOR R012 RD161J l03Y CARBON RESISTOR R013 QRD161J 1S2Y CARBON RESISTOR R014 RD161J 473Y CARBON RESISTOR...

Page 24: ...I E _ v RI2 _ oD I 1f iD I GC R22e _ _ Rl54 I 2 rt i 1 0 u IWI 54 C261 RZ51 l _ _ Rl 52 I R255 C2 52 C122 e129 t ClS3 2 I 5 cm o R256 Cl53 _ _ C151 CI6J_ _ R15 In55 Rl56 _ Cl RIS2 I _RIIS Fig 8 5 No 1740 24 FII17 Q1ID FIIIO I fDJ flI999 T999 F999 U I 0998 U o o o L IL J96B U A PC V77A U PC V77U G PC V77G V ...

Page 25: ... I 11903 il f 8 R901 ni I e72 i I i I i lil U N I DE NI ti I RUe _ _ Rl54 l1 r1 i1 j 0 0252 i l C251 u I _S 1 261 R251 R152 1 R255 1 252 122 r UU I CI29 C7St t C751 C2S3 o R256 C153 C151 C16J _ RI 5 Rl 5 5 RlSfi _ Cl 00 DID C306 C406 C 01 rl I 88 7 IH I Is i I I C401 FWn2 R 02 1 11 17 li 11 cnID Rm j DID1 C 300 Fig 8 6 PC V77 A B E G UN S I T999 J9S6 DJ FW999 INo 1740 25 ...

Page 26: ...808 QFV41HJ I04 TF CAPACITOR C810 QETCIHM I04ZN E CAPACITOR C812 QETCIAM 476ZN E CAPACITOR 1 C813 QETC lAM 4 76Z N E CAPAC ITOR C814 QETCIAM 476ZN E CAPACITOR C815 QETCIAM 476ZN E CAPACITOR C816 QETCIEM 227ZN E CAPACITOR C817 QETCIHM 154Z E CAPACITOR C819 QCC31EM I04ZV C CAPACITOR C820 QCC31EM I04ZV C CAPACITOR C821 QETCIAM 477ZN E CAPACITOR C822 QETCIAM I07ZN E CAPACITOR 1 C 9 9 0 0 12 _ QEJCIAM ...

Page 27: ...T Oc R___1 VR202 QV PA60 1 103 V RESISTOR VR221 QVPA603 103 V RESISTOR VR222 QVPA60 1 1 04 V RESISTOR VR821 QVD B26A VOl V RESISTOR VR822 QVXB 1JG V15 V RESISTOR VR823 QVXBl J G V15 V RES I STOc R 1 VR824 QVXB1 JG V15 V RESISTOR VR825 QVX B1JG V15 V RESISTOR VR826 QVXB1JG V15 V RESISTOR VR851 QV PA603 202 V RESISTOR RE F NO PART S NO PAR T S NAME 180 VYH3453 001 RADIATION 181 SBSB3010Z SCREW 182 S...

Page 28: ...ITCH QSP030 002M TACT SW ITCH QSP0301 002M TACT SW ITCH QSP0301 002M TACT SWITCH QSP0301 002 M TACT Sl ITCH VGL1035 002 Leo VGZOO01 028 P Lamp VYH6645 001 Shield VYH6646 001 Shield VYSH103 064 Spacer No 1740 28 DTS Board A U Version Du w V w u Du _ V Dv Dv l v 5 en Fig 8 8 1 L l REF 0 PAIlTS NO PARTS NAME IlEI _ 10 PARTS NO PAIlTS NAM I CSOl QCYB1HK l03Y C CAPACITOR QS03 2SC2812L 6TB TRANSISTOR CS...

Page 29: ... parts make sure to use the specified one Lt I E F PAWl S NO PARTS NAME REMAI KS QTY 1 1 VJC2306 00A SP PANEL ASS Y LEFT 1 1 2 VJC2307 00A SP PANEL ASS Y RIGHT 1 2 EAS10P268J SPEAKER 1 3 GBSF3010Z SCREW FOR SPEAKER 4 4 1 VJC1636 001 REAR CABINET LE FT 1 4 2 VJ C1644 001 REAR CABINET RIG HT 1 5 VYN7 038 001B NAME PLATE 1 6 VMPOO40 001N SPEA KER CODE 1 7 TEP357469 0 2 STOPPER 1 8 SBS F30 20 Z SCRE I...

Page 30: ...t J PC V77 A B E G UN cO jg Exploded View of Mechanism Assembly p H q o Fig 10 1 30 No 1740 ...

Page 31: ...WHEEL ASS Y 44 192109303T FLYWHEEL ASS Y 45 19212605T TORSION SPRING 1 92i2650 2T GEAR PLATE ASY 46 47 48 t 9 50 51 52 53 55 56 57 58 59 60 61 19212602T CAM GEAR 192126501T GEAR PLATE ASY 18211070T F F GEAR 18291010T BACK TENS SP 192105 3 0zT sUP pCYRIE c L A o S C Y 1 192105301T T UP REEL ASS Y 19210506T SENSER 19211210T MOTOR BRACKET 18201306T RUBBER CUSHION 18211 202 T C0 L L A R S C R E W 1921...

Page 32: ...77 U 1 Rear Cabinet VJC 1624 004 VJC 1624 002 VJC 1624 005 VJC 1624 002 VJC 1624 002 7 Name Plate VYN7038 003 VYN7038 002 VYN7038 007 VYN7038 006 VYN7038 004 11 AC Slider VYH6552 001 VYH6552 001 VYH6552 001 VYH6552 001 VYH6552 002 41 Front Cabinet VJC 1628 002 VJC 1628 002 VJC 1628 003 VJC 1628 002 VJC 1628 002 43 LCD Lens VJC3684 002 VJC3684 002 VJC3684 002 VJC3684 003 VJC 3684 003 No 1740 32 ...

Page 33: ...8 004 PC V77 A B E G U V 1 parts are safety assurance parts When replacing those parts make sure to use the specified one PARTS NAME REMARKS QTY REAR CABINET 1 BATTERY SPRING 1 T ANTENNA ASS Y 1 LUG TERMINAL 1 SCREW FOR ANTENNA 1 SHEET 1 NAME PLATE 1 BATTERY COVER 1 HANDLE ASS Y 1 WIRE HOLDER 2 AC SLIDER 1 WIRE CLAMP 1 AC BRACKET 1 SCREW 2 3D BASE 1 SPEAKER 1 SCREW FOR SPEAKER 4 3D COVER 1 SCREW C...

Page 34: ...N VXS4257 001 VXL4299 001 VJD5080 001 VYH6700 001 VYSH107 010 VYSA1R4 066 ZCPRV77K FBK ZCPRV77K CH A ZCPRV77K CH B PARTS NAME REMARKS QTY GEAR 2 DAMPER HOLDER 2 SCREW FOR DAMPER 2 CASSETTE SPRING 4 DOOR SPRING 1 DOOR SPRING 1 BUTTON LEVER 10 BUTTON BRACKET 2 SCREW 6 BUTTON REO 1 BUTTON PLAY 2 BUTTON R EW 2 BUTTON FF 2 BUT STOP EJ EC T 2 BUTTON PAUSE 1 SCREW FOR BOARD 2 LCD CASE 1 SHEET 1 SCREW CAB...

Page 35: ...Q ty 1 VPC 7038 00 1 Carton 1 2 VPH 1410 001 Cushion Left Side bottom 1 3 VPH 1410 002 Cushion Right Side bottom 1 5 VPE3005 004 Poly Bag for Instruction 1 7 QPGA012 02505 Poly Bag for Power Cord 1 8 VPE3005 026 Poly Bag for Receiver 1 9 VPK4002 016 Sheet 1 10 VPE3005 016 Poly Bag for Speaker 2 11 VPZ4001 001 Serial Ticket 2 12 VPH 1411 002 Cushion Left Side 1 13 VPHl 41 1 001 Cushion Right Side 1...

Page 36: ...nstruction Book Warranty Card FTZ Information Sheet Warning l abel Power Cord Remarks BIG Version EVersion A Version U Version B Version BIG Version A Version G Version G Version 8 Version B Version A Version E G Version U Version Free gervice manuals Gratis schema s Oigili7 d by www freeservicemanuals info AUDIO PRODUCTS DIVISION MAEBASHI PLANT 10 1 l chome Ohwatari cho Maebashi city Japan No 174...