Jvc-SRVS-30-EK-Service-Manual电路原理图.pdf
SERVICE MANUALNo.82910March 2002SR-VS30E/EKMini DV/S-VHS VIDEO CASSETTE RECORDERSPECIFICATIONS (The specifications shown pertain specifically to the model SR-VS30E.)This service manual is printed on 100% recycled paper.COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD625TV PR +TV PR TV TV+12345678912123VHSDVTVCABLE/SATTV/VCR : AUDIO0000STARTDEBUTSTOPFINDATE PRDAILY/QTDN.VPS/PDCAUXWEEKLY/HEBDOEXPRESSLCD PROG0PROG OK344MENU30 SECENTER/ENTREEVHSDUB COPIEDVDV VHSPR / + PUSH / TURN24HEXPRESS1 32PULL-OPENTIRER-OUVRIRPULL-OPENTIRER-OUVRIRGENERALPower requirement : AC 220 V - 240 Vd, 50 Hz/60 HzPower consumptionPower on : 31 WPower off : 6.5 WTemperatureOperating :Storage :Operating position : Horizontal onlyDimensions (WxHxD): 435 mm x 106 mm x 380 mm Weight : 5.1 kgInput/Output : 21-pin SCART connectors:IN/OUT x 1, IN/DECODER x 1RCA connectors:VIDEO IN x 1, AUDIO IN x 1, AUDIO OUT x 1S-Video connectors:IN x 1, OUT x 1DV connector:IN/OUT x 1 (4-pin, IEEE1394 conformity, digital input/output)VHS DECK VIDEO/AUDIOSignal system : PAL-type colour signal and CCIR monochrome signal, 625 lines 50 fieldsRecording system : DA4 (Double Azimuth) head helical scan systemFormat : S-VHS/VHS PAL standardSignal-to-noise ratio: 45 dBHorizontal resolution(SP/LP) : 250 lines (VHS)400 lines (S-VHS)Frequency range : 70 Hz to 10,000 Hz (Normal audio)20 Hz to 20,000 Hz (Hi-Fi audio)Maximum recording time(SP) : 240 min. with E-240 video cassette(LP) : 480 min. with E-240 video cassetteDV DECK VIDEO/AUDIOSignal system : PAL-type colour signal, 625 lines 50 fieldsRecording system : Digital Component RecordingFormat : DV format (SD mode)Cassette : Mini DV CassetteMaximum recording time(SP) : 80 min. with M-DV80ME cassette(LP) : 120 min. with M-DV80ME cassetteAudio recording system: PCM 48 kHz, 16 bit (2 ch)/32 kHz, 12 bit (4 ch)TUNER/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 MHzMemory backup time: Approx. 10 min.ACCESSORIESProvided accessories: RF cable,21-pin SCART/RCA cable,BNC/RCA adapter x 2,Satellite Controller,Infrared remote control unit,“R6“ battery x 2Specifications shown are for SP mode unless otherwise specified.E.& O.E. Design and specifications subject to change without notice.5°C to 40°C20°C to 60°CSR-VS30E/EK V14SD1TABLE OF CONTENTSSection Title Page Section Title PageImportant Safety PrecautionsINSTRUCTIONS1. DISASSEMBLY1.1 HOW TO REMOVE THE MAJOR PARTS . 1-11.1.1 Introduction . 1-11.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY . 1-11.3 DISCONNECTION OF CONNECTORS (WIRES) . 1-11.4 HOW TO REMOVE THE MAJOR PARTS . 1-21.4.1 Disassembly flow chart . 1-21.4.2 Disassembly/assembly method . 1-21.5 HOW TO REMOVE THE MAJOR PARTS . 1-41.5.1 Disassembly flow chart . 1-41.5.2 DIsassembly/assembly method . 1-41.6 HOW TO REMOVE THE MAJOR PARTS . 1-61.6.1 Disassembly flow chart . 1-61.6.2 Disassembly/assembly method . 1-61.7 CONNECTION . 1-81.8 SERVICE POSITIONS . 1-101.8.1 Requirement PATCH CORDS . 1-101.8.2 Service position . 1-101.8.3 Service position . 1-101.8.4 Service position . 1-111.9 Jig RCU mode . 1-111.9.1 Setting the Jig RCU mode . 1-111.9.2 Setting the User RCU mode . 1-111.10 MECHANISM SERVICE MODE . 1-121.10.1 How to set the “MECHANISM SERVICE MODE” . 1-121.11 EMERGENCY DISPLAY FUNCTION . 1-131.11.1 Displaying the emergency information . 1-131.11.2 Clearing the emergency history . 1-131.11.3 Emergency content description . 1-141.11.4 Emergency detail information . 1-151.11.5 Emergency detail information . 1-162. MECHANISM ADJUSTMENT (VHS)2.1 BEFORE STARTING REPAIR AND ADJUSTMENT . 2-12.1.1 Precautions . 2-12.1.2 Checking for Proper Mechanical Operations . 2-12.1.3 Manually Removing the Cassette Tape . 2-12.1.4 Jigs and Tools Required for Adjustment . 2-22.1.5 Maintenance and Inspection . 2-32.2 REPLACEMENT OF MAJOR PARTS . 2-62.2.1 Before Starting Disassembling(Phase matching between mechanical parts) . 2-62.2.2 How to Set the Mechanism Assembling Mode . 2-62.2.3 Cassette Holder Assembly . 2-62.2.4 Pinch Roller Arm Assembly . 2-82.2.5 Guide Arm Assembly and Press Lever Assembly . 2-82.2.6 Audio Control Head . 2-82.2.7 Loading Motor . 2-82.2.8 Capstan Motor . 2-92.2.9 Pole Base Assembly (supply or take-up side) . 2-92.2.10 Rotary Encoder . 2-102.2.11 Clutch Unit . 2-102.2.12 Change Lever Assembly, Direct Gear, Clutch Gearand Coupling Gear . 2-102.2.13 Link Lever . 2-112.2.14 Cassette Gear, Control Cam and Worm Gear . 2-112.2.15 Control Plate . 2-112.2.16 Loading Arm Gear (supply or take-up side)and Loading Arm Gear Shaft . 2-122.2.17 Take-up Lever, Take-up Head and Control Plate Guide . 2-132.2.18 Capstan Brake Assembly . 2-132.2.19 Sub Brake Assembly (take-up side) . 2-132.2.20 Main Brake Assembly (take-up side),Reel Disk (take-up side)and Main Brake Assembly (supply side) . 2-132.2.21 Tension Brake Assembly, Reel Disk (supply side)and Tension Arm Assembly . 2-142.2.22 Idler Lever, Idler Arm Assembly . 2-142.2.23 Stator Assembly . 2-142.2.24 Rotor Assembly . 2-142.2.25 Upper Drum Assembly . 2-152.3 COMPATIBILITY ADJUSTMENT . 2-162.3.1 Checking/Adjustment of FM Waveform Linearity . 2-162.3.2 Checking/Adjustment of the Height and Tilt of the Audio Control Head . 2-172.3.3 Checking/Adjustment of the Audio Control Head Phase (X-Value) . 2-172.3.4 Checking/Adjustment of the Standard Tracking Preset . 2-182.3.5 Checking/Adjustment of the Tension Pole Position . 2-18MECHANISM ADJUSTMENT (DV)2.4 PREPARATION . 2-202.4.1 Precautions . 2-202.4.2 Tools Required for Adjustments . 2-202.4.3 Disassembly and Assembly Procedures . 2-202.4.4 Screws and Washers Used in Disassembly/Assembly of the Mechanism Assembly . 2-202.5 DISASSEMBLY/ASSEMBLY OF THE MECHANISM ASSEMBLY . 2-212.5.1 Introduction . 2-212.5.2 Mechanism Modes . 2-212.6 MECHANISM TIMING CHART . 2-232.7 MECHANISM ASSEMBLY/DISASSEMBLY PROCEDURE TABLE . 2-242.8 DISASSEMBLY/ASSEMBLY . 2-262.9 LIST OF PROCEDURES FOR DISASSEMBLY . 2-342.10 MECHANISM PHASE CHECK/ADJUSTMENT . 2-352.11 MECHANISM DISASSEMBLY/ASSEMBLY SHEET . 2-362.12 POSITIONING THE TENSION POLE . 2-382.13 COMPATIBILITY AND ERROR RATE ADJUSTMENTS . 2-392.13.1 Preparation . 2-392.13.2 Adjustment . 2-392.13.3 Linearity adjustment . 2-402.13.4 PB switching point adjustment . 2-402.13.5 Error rate adjustment . 2-402.13.6 Error rate measuring method . 2-402.14 TAPE EJECTION . 2-413. ELECTRICAL ADJUSTMENT (VHS)3.1 PRECAUTION . 3-13.1.1 Required test equipments . 3-13.1.2 Required adjustment tools . 3-13.1.3 Color (colour) bar signal,Color (colour) bar pattern . 3-13.1.4 Switch settings and standard precautions . 3-13.1.5 EVR Adjustment . 3-13.2 SERVO CIRCUIT . 3-23.2.1 Switching point . 3-23.2.2 Slow tracking preset . 3-23.3 VIDEO CIRCUIT . 3-23.3.1 D/A level . 3-23.3.2 EE Y/PB Y (S-VHS/VHS) level . 3-23.3.3 REC color (colour) level . 3-33.3.5 Video EQ (Frequency response) . 3-33.3.6 AUTO PICTURE initial setting . 3-43.3.6 DV EE Y level . 3-43.4 AUDIO CIRCUIT . 3-43.4.1 Audio REC FM . 3-43.5 SYSCON CIRCUIT . 3-43.5.1 Timer clock . 3-4ELECTRICAL ADJUSTMENT (DV)3.6 PREPARATION . 3-53.6.1 Precautions . 3-53.6.2 Equipment required for adjustment . 3-53.6.3 Tools required for adjustments . 3-53.6.4 Setup . 3-54. CHARTS AND DIAGRAMSNOTES OF SCHEMATIC DIAGRAM . 4-1CIRCUIT BOARD NOTES . 4-24.1 BOARD INTERCONNECTIONS . 4-34.2 SWITCHING REGULATOR SCHEMATIC DIAGRAM . 4-54.3 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM . 4-74.4 MAIN (VHS SYSCON) SCHEMATIC DIAGRAM . 4-94.5 MAIN (TUNER) SCHEMATIC DIAGRAM . 4-114.6 MAIN (VIDEO I/O & SUB EMPHA) SCHEMATIC DIAGRAM . 4-134.7 MAIN (AUDIO I/O) SCHEMATIC DIAGRAM . 4-154.8 MAIN (CONNECTION) SCHEMATIC DIAGRAM . 4-174.9 3D DIGITAL/2M SCHEMATIC DIAGRAM . 4-194.10 TERMINAL (S-SUB) SCHEMATIC DIAGRAM . 4-214.11 TERMINAL (I/O) SCHEMATIC DIAGRAM . 4-234.12 DEMODULATOR SCHEMATIC DIAGRAM . 4-254.13 POWER SW, SW/DISPLAY AND JOG SCHEMATIC DIAGRAMS . 4-274.14 DV MSD SCHEMATIC DIAGRAM . 4-294.15 DV MAIN SCHEMATIC DIAGRAM . 4-314.16 DV I/O SCHEMATIC DIAGRAM . 4-334.17 DV V OUT SCHEMATIC DIAGRAM . 4-354.18 DV PRE/REC SCHEMATIC DIAGRAM . 4-374.19 DV REG SCHEMATIC DIAGRAM . 4-394.20 DV AUDIO AD/DA SCHEMATIC DIAGRAM . 4-404.21 MAIN(ON SCREEN) SC
