Jvc-SRV-10-Service-Manual电路原理图.pdf

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTDThis service manual is printed on 100% recycled paper.SERVICE MANUALGENERALPower requirement : AC 220 V 240 Vd, 50 Hz/60 HzPower consumptionPower on : 18 WPower off : 3.6 WTemperatureOperating : 5°C to 40°CStorage : 20°C to 60°COperating position : Horizontal onlyDimensions (WxHxD): 400 mm x 94 mm x 270 mm Weight : 3.4 kgFormat : S-VHS/VHS PAL standardMaximum recording time(SP) : 240 min. with E-240 video cassette(LP) : 480 min. with E-240 video cassette(EP) : 720 min. with E-240 video cassetteVIDEO/AUDIOSignal system : PAL-type colour signal and CCIR monochrome signal, 625 lines 50 fieldsRecording system : DA4 (Double Azimuth) head helical scan systemSignal-to-noise ratio: 45 dBHorizontal resolution(SP/LP) : 250 lines (VHS)400 lines (S-VHS)(EP) : 220 lines (VHS)350 lines (S-VHS)Frequency range : 70 Hz to 10,000 Hz (Normal audio)20 Hz to 20,000 Hz (Hi-Fi audio)Input/Output : RCA connectors:VIDEO IN x 2, VIDEO OUT x 1, AUDIO IN x 2, AUDIO OUT x 1S-Video connectors:IN x 2, OUT x 1TUNER/TIMERTV channel storage capacity: 99 positions (+AUX position)Tuning system : Frequency synthesized tunerChannel coverage : VHF 47 MHz 89 MHz/104 MHz 300 MHz/302 MHz 470 MHzUHF 470 MHz 862 MHzAerial output : UHF channels 22 69 (Adjustable)Memory backup time: Approx. 6 monthsEstimated figure based on provided fresh battery; actual performance may differ.ACCESSORIESProvided accessories: RF cable,S-video cable,Audio/video cable,Infrared remote control unit,“R6” battery x 2,Lithium battery CR2025,BNC/RCA adapter x 2Specifications shown are for SP mode unless otherwise specified.E.& O.E. Design and specifications subject to change without notice.No.82945October 2002SR-V10E,SR-V10EKSR-V10E, SR-V10EK V15S2VIDEO CASSETTE RECORDERSPECIFICATIONS (The specifications shown pertain specifically to the model SR-V10E.)Note:Most of the schematic diagrams for this model are the same as for the HR-S7950EU model. The schematic diagram and circuit boards that are different in the case of the HR-S7950EU model are described below. MAIN(SYSCON) SCHEMATIC DIAGRAM page 4-57. MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM page 4-53. MAIN CIRCUIT BOARD page 4-55TABLE OF CONTENTSSection Title Page Section Title PageDIFFERENCE LISTImportant Safety PrecautionsINSTRUCTIONS1. DISASSEMBLY1.1 Manually removing the cassette tape . 1-11.2 Removing the major parts. 1-21.2.1 How to read the procedure table. 1-21.2.2 Disassembly procedure . 1-21.3 Emergency display function. 1-41.3.1 Displaying the EMG information . 1-41.3.2 Clearing the EMG history. 1-41.3.3 Details of the OSD display in the EMG display mode . 1-51.3.4 EMG content description. 1-61.3.5 EMG detail information . 1-71.3.6 EMG detail information . 1-81.3.7 EMG detail information . 1-81.4 Service position. 1-91.4.1 How to set the “Service position“. 1-91.5 Jig RCU mode. 1-91.5.1 Setting the Jig RCU mode . 1-91.5.2 Setting the User RCU mode . 1-91.6 Mechanism service mode . 1-91.6.1 How to set the “Mechanism service mode“. 1-91.6.2 How to exit from the “Mechanism service mode“. 1-91.7 Maintenance and inspection . 1-101.7.1 Cleaning. 1-101.7.2 Lubrication . 1-101.7.3 Suggested servicing schedule for main components. 1-101.8 Sevicing items related to video navigation. 1-102. MECHANISM2.1. Before disassembling/assembling . 2-12.1.1 Notes. 2-12.1.2 Mechanism operation check . 2-12.1.3 Setting the mechanism assembling mode . 2-12.1.4 Layout of the main mechanism parts. 2-22.1.5 Disassembling procedure table. 2-32.2. Replacement of the main mechanism parts. 2-42.2.1 Cassette holder. 2-42.2.2 A/C head . 2-52.2.3 Guide arm, pinch roller arm . 2-62.2.4 Idler arm, idler gear 1/2. 2-62.2.5 Main brake(T), brake lever, tension arm,reel disk(S/T), Rec safety lever . 2-62.2.6 Press lever, control cam, capstan brake assembly,loading motor assembly . 2-72.2.7 Capstan motor, load gear, control plate . 2-82.2.8 Clutch unit assembly, direct gear . 2-92.3. Mechanism timing chart. 2-103. ADJUSTMENT3.1 Before adjustment. 3-13.1.1 Precaution. 3-13.1.2 Required test equipments. 3-13.1.3 Required adjustment tools . 3-13.1.4 Color(colour) bar signal, color(colour) bar pattern . 3-13.1.5 Switch settings. 3-13.1.6 Manual tracking mode (Auto tracking ON/OFF) setting. 3-13.1.7 EVR sdjustment. 3-23.2 Mechanism compatibility adjustment . 3-23.2.1 Tension pole position. 3-33.2.2 FM waveform linearity. 3-33.2.3 Height and tilt of the A/C head . 3-33.2.4 A/C head phase(X-value). 3-43.3 Electrical Adjustment. 3-43.3.1 Servo circuit . 3-43.3.1.1 Switching point. 3-43.3.1.2 Slow tracking preset. 3-53.3.2 Video circuit. 3-53.3.2.1 EE Y/PB Y(S-VHS/VHS)level. 3-53.3.3 Audio circuit. 3-53.3.3.1 Audio REC FM . 3-53.3.4 Syscon circuit(EU/EK MODEL). 3-63.3.4.1 Timer clock. 3-63.3.5 PAL/SECAM converter circuit(MS MODEL). 3-63.3.5.1 Colour difference level . 3-63.3.5.2 SECAM burst position. 3-64. CHARTS AND DIAGRAMS4.1 BOARD INTERCONNECTIONS. 4-34.2 MAIN(VIDEO/N.AUDIO) SCHEMATIC DIAGRAM. 4-54.3 MAIN(ON SCREEN) SCHEMATIC DIAGRAM. 4-74.4 MAIN(SECAM) SCHEMATIC DIAGRAM HR-S6950MS/S7955MS. 4-84.5 MAIN(FMA) SCHEMATIC DIAGRAM . 4-94.6 MAIN(SYSCON) SCHEMATIC DIAGRAM. 4-114.7 MAIN(SW.REG) SCHEMATIC DIAGRAM. 4-134.8 MAIN(TUNER) SCHEMATIC DIAGRAM. 4-154.9 MAIN(FRONT) ,MINI FRONT, S-JACK AND ADV.JOG SCHEMATIC DIAGRAM . 4-174.10 MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM. 4-194.11 2D DIGITAL SCHEMATIC DIAGRAM HR-S6950EU/S6955MS/S7955MS . 4-214.12 3D/TBC (2M) SCHEMATIC DIAGRAM HR-S7950EU/S7955EK. 4-234.13 TERMINAL(S-SUB) SCHEMATIC DIAGRAM. 4-254.14 TERMINAL(I/O) SCHEMATIC DIAGRAM.4-274.15 DEMODULATOR SCHEMATIC DIAGRAM . 4-294.16 S-P CONVERTER SCHEMATIC DIAGRAM HR-S6955MS/S7955MS. 4-314.17 MAIN CIRCUIT BOARD. 4-334.18 2D DIGITAL AND 3D DIGITAL/2M CIRCUIT BOARDS . 4-364.19 DEMODULATOR CIRCUIT BOARD. 4-374.20 S-P CONVERTER CIRCUIT BOARDHR-S6955MS/S7955MS . 4-374.21 TERMINAL CIRCUIT BOARD. 4-384.22 WAVEFORMS. 4-394.23 VOLTAGE CHARTS. 4-414.24 REMOTE CONTROLLER SCHEMATIC DIAGRAM . 4-434.25 FDP GRID ASSIGNMENT AND ANODE CONNECTION . 4-434.26 CPU PIN FUNCTION . 4-444.27 SYSTEM CONTROL BLOCK DIAGRAM . 4-454.28 VIDEO BLOCK DIAGRAM . 4-474.29 AUDIO BLOCK DIAGRAM. 4-514.30 MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM SR-V10E, SR-V10EK . 4-534.31 MAIN CIRCUIT BOARD SR-V10E, SR-V10EK . 4-554.32 MAIN(SYSCON) SCHEMATIC DIAGRAM SR-V10E, SR-V10EK. 4-575. PARTS LIST5.1 PACKING AND ACCESSORY ASSEMBLY . 5-15.2 FINAL ASSEMBLY. 5-25.3 MECHANISM ASSEMBLY. 5-45.4 ELECTRICAL PARTS LIST. 5-6MAIN BOARD ASSEMBLY. 5-63D D/2M BOARD ASSEMBLY. 5-12TERMINAL BOARD ASSEMBLY. 5-13A/C HEAD BOARD ASSEMBLY . 5-15DEMOD BOARD ASSEMBLY. 5-15S.JACK BOARD ASSEMBLY. 5-15ADV.JOG BOARD ASSEMBLY. 5-15LOADING MOTOR BOARD ASSEMBLY. 5-151The following table indicates main different points between models HR-S7950EU, SR-V10E and SR-V10EK.MODELHR-S7950EUITEMPOWER PLUG CEE 3 PINBODY COLOR PURE SILVER DARK GRAYREPEAT TIMES 100 NO LIMITMESECAM USED NOT USED16:9 USED NOT USEDREAR L-1 INPUT USED(SCART) USED(S,V,LR)REAR L-2 INPUT USED NOT USEDAV OUT S,LR S,V,LRSATELLITE CONTROLLER TERMINAL USED NOT USEDREMOTE PAUSE TERMINAL USED NOT USEDREMOTE TERMINAL NOT USED USEDBROADCASTING STANDARD B/G,D/K ISTEREO DECODER NICAM/A2 NICAMLITHIUM BATTERY BACKUP NOT USED USEDVCR PLUS SHOVIEW DELUXE SHOWVIEW VCRplusINSTANT REC MAX TIME 6H NOREC LINK USED(L-2) USED(L-1)VPS USED NOT USEDOSD LANGUAGE 13 LANGUAGES ENGLISHPRESET DOWNLOAD USED NOT USEDDIRECT REC USED NOT USEDTV AUTO POWER ON USED NOT USEDNEXTVIEW LINK USED NOT USEDREPEAT REC, PLAY NOT USED USEDSELECT RETURN POINT (PLAYBACK) NOT USED USEDSERIES REC, PLAY NOT USED USEDMODE LOCK NOT USED USEDDAY, TIME INSERT NOT USED USEDREC SAFETY ON/OFF NOT USED USEDLAST FUNCTION MEMORY NOT USED USEDOSD OFF(REC, PLAY) NOT USED USEDWIRED RCU NOT USED USEDDAILY TIMER RECORD NOT USED USEDSR-V10E SR-V10EKNote: Mark is same as left.Mark is not used.Important Safety PrecautionsPrior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codesof the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement thefollowing precautions when a set is being serviced.Fig.11. Locations requiring special caution are denoted by labels andinscriptions on the cabinet, chassis and certain parts of theproduct. When performing service, be sure to read and com-ply with these and other cautionary notices appearing in theoperation and service manuals.2. Parts identified by the symbol and shaded ( ) parts arecritical for safety.Replace only with specified part numbers.Note: Parts in this category also include those specified to com-ply with X-ray emission standards for products usingcathode ray tubes and those specified for compliancewith various regulations regarding spurious radiationemission.3. Fuse replacement caution notice.Caution for continued protection against fire hazard.Replace only with same type and rated fuse(s) as specified.4. Use specified internal wiring. Note especially:1) Wires covered with PVC tubing2) Double insulated wires3) High voltage leads5. Use specified insulating materials for hazardous live parts.Note especially:1) Insulation Tape 3) Spacers 5) Barrier2) PVC tubing 4) Insulation sheets for transistors6. When replacing AC primary side components (transformers,power cords, noise blocking capacitors, etc.) wrap ends ofwires securely about the terminals before soldering.Power cordFig.210. Also check areas surrounding repaired locations.11. Products using cathode ray tubes (CRTs)In regard to such products, the cathode ray tubes themselves,the high voltage circuits, and related circuits are specified forcompliance with recognized codes pertaining to X-ray emission.Consequently, when servicing these products, replace the cath-ode ray tubes and other parts with only the specified parts.Under no circumstances attempt to modify these circuits.Unauthorized modification can increase the high voltage valueand cause X-ray emission from the cathode ray tube.12. Crimp type wire connectorIn such cases as when replacing th