Jvc-SRVS-30-U-Service-Manual电路原理图.pdf

SERVICE MANUALNo.82909March 2002Mini DV/S-VHS VIDEO CASSETTE RECORDERSPECIFICATIONSThis service manual is printed on 100% recycled paper.COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTDSR-VS30USR-VS30U V14SD11234567 8902413T WDV S-VHSPOWERTV/VCRA/B DISPLAYENTER/OSDA.MONITORVCR TV CABLE/DBSCANCEL TIMERSTART STOP DATE CHC. RESETDBS DAILY(M-F)AUXWEEKLYPROGEXPRESS PROGRAMMINGPROGCHECKSP/LPSP/EPPLAYREWRECSTOP PAUSEFFTV CH + TV CH TV VOL + TV VOL MENUOKJOG/SHUTTLETIDE.A.RTUO/NITRATSS-VHS RECDUB DVDV S-VHSCH / + PUSH / TURN24HRQUICK PROGRAMPULL-OPEN PULL-OPENREW FFPAUSEPLAYSTOPEJECTPOWER EJECTGENERALPower requirement : AC 120 Vd, 60 HzPower consumptionPower on : 35 WPower off : 4.4 WTemperatureOperating : 5°C to 40°C (41°F to 104°F)Storage : 20°C to 60°C (4°F to140°F)Operating position : Horizontal onlyDimensions (WxHxD): 435 mm x 106 mm x 380 mm (17-3/16” x 4-3/16” x 15”)Weight : 5.1 kg (11.2 lbs)Input/Output : RCA connectors:IN x 2, OUT x 2S-Video connectors:IN x 2, OUT x 2DV connector:IN/OUT x 1 (4-pin, IEEE1394 conformity, digital input/output)VHS DECK VIDEO/AUDIOSignal system : NTSC-type color signal and EIA monochrome signal, 525 lines/60 fieldsRecording system : DA4 (Double Azimuth) head helical scan systemFormat : S-VHS/VHS NTSC standardSignal-to-noise ratio: 45 dBHorizontal resolution: 230 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) : 210 min. with ST-210 video cassette(EP) : 630 min. with ST-210 video cassetteDV DECK VIDEO/AUDIOSignal system : NTSC-type colour signal, 525 lines 60 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)TUNERTuning system : Frequency synthesized tunerChannel coverageVHF : Channels 213UHF : Channels 1469CATV : 113 ChannelsTIMERClock reference : QuartzProgram capacity : 1-year programmable timer/6 programs each on the VHS and DV deckMemory backup time: Approx. 10 min.ACCESSORIESProvided accessories: RF cable (F-type),BNC/RCA adapter x 2,Audio/Video cable,S-Video cable (4-pin),Controller,Infrared remote control unit,“AA” battery x 2Specifications shown are for SP mode unless otherwise specified.E.& O.E. Design and specifications subject to change without notice.This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.TABLE 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 DEMODULATOR CIRCUIT .3-53.5.1 Input level .3-53.5.2 Stereo VCO .3-53.5.3 Stereo filter .3-53.5.4 Separation-1 .3-53.5.5 Separation-2 .3-63.5.6 SAP VCO .3-6ELECTRICAL ADJUSTMENT (DV)3.6 PREPARATION .3-73.6.1 Precautions .3-73.6.2 Equipment required for adjustment . 3-73.6.3 Tools required for adjustments . 3-73.6.4 Setup .3-74. CHARTS AND DIAGRAMSNOTES OF SCHEMATIC DIAGRAM . 4-1CIRCUIT BOARD NOTES .