Jvc-SRMV-50-US-Service-Manual电路原理图.pdf
SERVICE MANUALCOPYRIGHT © 2005 Victor Company of Japan, LimitedNo.YD0452005/1DVD VIDEO RECORDER preset to Channel 3 when shipped) 75 , unbalancedMemory backup time Approx. 5 secondsACCESSORIESProvided accessories RF cable, Audio cable, S-video cable, Infrared remote control unit, “AA“ battery × 2(No.YD045)1-3SECTION 1PRECAUTIONPlease refer to “DR-MV1SUS No.YD006“ about this section.SECTION 2SPECIFIC SERVICE INSTRUCTIONSPlease refer to “DR-MV1SUS No.YD006“ about this section except a written item.2.1 DIFFERENT TABLE OF FEATUREThe following table indicates main different points between models DR-MV1SUS and SR-MV50US.SECTION 3DISASSEMBLYPlease refer to “DR-MV1SUS No.YD006“ about this section.MODEL NAME DR-MV1SUS SR-MV50USBODY COLOR PURE SILVER GRAYFRONT DOOR USED NOT USEDILLUMINATION COLOR USED(BLUE) NOT USEDVIDEO SYSTEM VHS S-VHSS-VHS ET NOT USED USEDSQPB USED NOT USEDTIME BASE CORRECTOR NOT USED USED3R PICTURE(DIGITAL or ANALOG) NOT USED USED3D DIGITAL Y/C SEPARATION NOT USED USED2MB FRAME MEMORY NOT USED USEDCABLE BOX CONTROLLER USED(OPTION) NOT USEDFRONT A/V INPUT CONNECTORS SILVER CONNECTORS GOLD CONNECTORSVIDEO OUTPUT CONNECTOR PIN JACK TYPE BNC TYPEREMOTE IN CONNECOTR NOT USED USEDSERIAL COMMAND CONNECTOR NOT USED USED (RS-232C)VCR PLUS+ (DVD SIDE) VCR PLUS+C3 VCR PLUS+LAST FUNCTION MEMORY NOT USED USEDMODE LOCK NOT USED USED1-4 (No.YD045)SECTION 4ADJUSTMENTPlease refer to “DR-MV1SUS No.YD006“ about this section except a written item.4.1 Electrical adjustment (VHS SECTION)Note:The following adjustment procedures are not only necessaryafter replacement of consumable mechanical parts or boardassemblies, but are also provided as references to be referredto when servicing the electrical circuitry. In case of trouble with the electrical circuitry, always begin aservice by identifying the defective points by using the measur-ing instruments as described in the following electrical adjust-ment procedures. After this, proceed to the repair,replacement and/or adjustment. If the required measuring in-struments are not available in the field, do not change the ad-justment parts (variable resistor, etc.) carelessly.4.1.1 Servo circuit4.1.1.1 Switching point (1) Play back the signal (A1) of the alignment tape (A2).(2) Apply the external trigger signal to D.FF (E) to observe theVIDEO OUT waveform and V.PB FM waveform at the measuring points (D1) and (D2).(3) Set the VCR to the manual tracking mode.(4) Adjust tracking so that the V.PB FM waveform becomes maximum.(5) Transmit the code (F) from the Jig RCU to adjust so that thetrigger point of the VIDEO OUT wavefome is changed fromthe trailing edge of the V.sync signal becomes the specifiedvalue (G).(6) Set the VCR to the stop mode.Fig.4-1a Switching point4.1.2 Video circuit4.1.2.1 EE Y/PB Y level(1) Input the signal (A3) from the input point (A1).(2) Set the VCR to the mode (B1).(3) Observe the Y OUT waveform at the measuring point (D).(4) Set the VCR to the EVR mode by transmitting the code (F1)from the Jig RCU.(5) Set the EVR address to (F2) by transmitting the code (F3)from the Jig RCU.(6) Transmit the code (F4) from the Jig RCU to adjust so thatthe Y level of the Y OUT waveform becomes the specifiedvalue (G).(7) Release the EVR mode of the VCR by transmitting thecode (F1) from the Jig RCU again. (When the EVR modeis released, the adjusted data is memorized.)(8) Input the signal (A3) from the input point (A2).(9) Repeat steps (3) to (7) in the mode (B1).(10) Record the signal (A3) in the mode (B2), and play back therecorded signal.(11) Set the VCR to the manual tracking mode.(12) Repeat steps (3) to (7) in the mode (B2).(13) Record the signal (A3) in the mode (B3), and play back therecorded signal.(14) Set the VCR to the manual tracking mode.(15) Repeat steps (3) to (7) in the mode (B3).Fig.4-1b EE Y/PB Y lebelSignal (A1)(A2) Stairstep signal Alignment tape(EP,stairstep,NTSC) MHP-LMode (B) PBEquipment (C) OscilloscopeMeasuring point (D) VIDEO OUT terminal (75 terminated) TP106 (PB. FM) External trigger (E) TP111 (D.FF) Adjustment part (F) Jig RCU: Code “43-51”or “43-52”Specified value (G) 8.0 ± 0.5HAdjustment tool (H) Jig RCU PTU94023BV.syncTrigger pointSwitching pointV. rateSignal (A1)(A2)(A3) Ext. S-input Ext. input Color (colour) bar signal NTSCMode (B1)(B2)(B3) EE SPS-VHS SPVHS SPEquipment (C) OscilloscopeMeasuring point (D) Y OUT terminal (75 terminated)EVR modeEVR address(F1)(F2)(F3)(F4) Jig code “43-57” A : 11 Jig code “43-21” twice Jig code “43-18” or “43-19” (Channel +/-)Specified value (G) 1.00 ± 0.05 Vp-pAdjustment tool (H) Jig RCU PTU94023BH. rateY level(No.YD045)1-54.1.3 Audio circuitNote: GND (Ground) should be taken from the Tuner shieldcase.4.1.3.1 Audio REC FM(1) Apply the external trigger signal to D.FF (E) to observe theAudio PB FM waveform at the measuring point (D).(2) Record the signal (A3) with no audio signal input in themode (B), and play back the recorded signal.(3) Set the VCR to the manual tracking mode.(4) If the A.PB FM level is not within the specified value (G1),perform the adjustment in a following procedure.(5) Adjust the Adjustment part (F) so that the A. PB FM level ofthe higher channel level becomes the specified value (G1).(Adjust before recording, then confirm it by playing back.)(6) If the specified value (G1) is not obtained, adjust the Ad-justment part (F) so that the waveform level of the lowerchannel level becomes the specified value (G2). (Adjustbefore recording, then confirm it by playing back.)Fig.4-1c Audio REC FMSECTION 5TROUBLESHOOTINGPlease refer to “DR-MV1SUS No.YD006“ about this section.Signal (A1)(A2)(A3) Ext. input Audio: No signal Video: Color (colour) bar signal NTSCMode (B) S-VHS EPTBC:OFFEquipment (C) OscilloscopeMeasuring point (D) TP2253 (A. PB FM) Main boardExternal trigger (E) TP111 (D.FF)Adjustment part (F) VR2251 (FMA REC LEVEL)Specified value (G1)(G2) 350 ± 50 mVp-p More than 200 mVp-pV. rateSpecifiedvalue (G1)Specifiedvalue (G2)(No.YD045)AV & MULTIMEDIA COMPANY DIGITAL VIDEO STORAGE CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, JapanVictor Company of Japan, LimitedVPTPrinted in JapanDVD VIDEO RECORDER & VIDEO CASSETTE RECORDER200SR-MV50USFor disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).Regarding service information other than these sections, refer to the service manual No. YD006 (DR-MV1SUS).Also, be sure to note important safety precautions provided in the service manual.EJECTEJECTTBCOPERATEVCR/DVD REC MODE DUBBS-VIDEOIN F-1VIDEO (MONO)L - AUDIO - RRECDVDDUBBTBCRECVCRDV INRECPAUSEPLAY CH +FFREWSTOPDVDVCR DVDVCRPROG/CHECK DISPLAY ON SCREENDVDTIMERVCR/DVDVCRTIMERSLOWPREVIOUS NEXTCLEARSLOWPAUSESTOP/PLAY/SELECTREMAIN RECCHAUDIOSUBTITLEANGLETV/VCRREC MODELIVE CHECKDVDTVCABLE/DBSABC DEFJKL MNOTUVGHIPQRS WXYZNUMBER / TV CH / DVD CHMEMO/MARKPROGRESSIVESCANVCR PLUS+AUXSET UPRETURNCANCELNAVIGATIONTOPMENU MENUTVVOL.TV/CBL/DVDTV/DVD TVTV/CBL/DBS/DVD 1472580369ENTERSR-MV50US D3RS29CD-ROM No.SML200501COPYRIGHT © 2005 Victor Company of Japan, Limited.No.YD045SCH2005/1SCHEMATIC DIAGRAMSA12345BCDCN3001CN7202CN6201 CN3107CN2301CN6202 CN7503CN6001CN6203CN2001 CN2002 CN1 CN3104CN7505CN6701CN1901CN501CN3106CN6204CN7502CN503CN502 CN504CN2 CN3FW7505CN7201BOARD INTERCONNECTIONSCHARTS AND DIAGRAMS2-1DE F GCN7107CN4104CN7501CN2601 CN8001CN3103CN7202CN7124CN7104CN5302CN5001CN501FW7001CN7103CN7002CN2201CN3901CN7105CN7109CN7108CN7102CN7401CN5304CN5501CN8501CN5301CN7001CN3102CN7505CN1404CN5303CN5311FW7504FW7505CN7507p10712001a_rev02-2A12345BCDDANGEROUS VOLTAGET5001R5326D5201C5002D5209D5104R5305D5001D5306D5204D5309C5206R5301R5303L5207R5306C5104R5109C5302C5301C5203D5207C5001IC5301L5202R5304IC5302D5212D5210D5307R5103D5101C5209C5303R5107B5001C5202D5301D5308C5102PC5101LF5002C5003R5108C5105R5106C5103R5105D5103R5101D5213C5204CP5301VA5001R5302C5101B5302C5304L5201C5307D5208C5313C5210R5318C5004R5325C5308R5001C5315F5001D5205C5207C5306C5314L5206D5211R5324L5205C5201D5202L5302Q5301D5302C5316CN5001C5106IC5101R5307C5005C5309D5206R5319L5204C5208D5203C5205C5305D5105D5106R5102R5104C5107VA5003SG5001470.02224k12002201.5k33µ3.9k470p470.0330.1512000.06833µ6.8k68k181006804.74700p3300.33470p3.9k276868k6801.5A4.7k100p10033µ100470p22047k472181004.7M0.011.6A470010010033µ47k33µ1200.014.7k100p474.7k33µ100015001001.2k1k220p!GROUND POINT FORPRIMARY VOLTAGEGROUND POINT FORSECONDARY VOLTAGE! !SWITCHING REGULATOR AND JUNCTION SCHEMATIC DIAGRAMS2-3
