Jvc-SRVS-20-Schematic电路原理图.pdf
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1、4-1SECTION 4CHARTS AND DIAGRAMSNOTES OF SCHEMATIC DIAGRAMSafety precautionsThe Components identified by the symbol arecritical for safety. For continued safety, replace safetycritical components only with manufacturers recom-mended parts.1. Units of components on the schematic diagramUnless otherwis
2、e specified.1) All resistance values are in ohm, 1/6 W, 1/8 W (refer toparts list).Chip resistors are 1/16 W.K or k: k (1000 ), M: M (1000k )2) All capacitance values are in F, (P: PF).3) All inductance values are in H, (m: mH).4) All diodes are 1SS133, MA165 or 1N4148M (refer to partslist).2. Indic
3、ations of control voltageAUX : Active at highAUX or AUX(L) : Active at low4) Indication on schematic diagramVoltage Indications for REC and PB mode on the sche-matic diagram are as shown below.Note: If the voltages are not indicated on the schematicdiagram, refer to the voltage charts.24C33111/10222
4、01816WF25C3290.1/50C3300.1/50R34447KR34318KR34510KR34615KMeasurement pointWaveform number5. Waveform measurement1) Video circuitsREC : Colour bar signal in SP mode, normal VHS modePB : Alignment tape, colour bar SP mode, normal VHSmode2) Audio circuitsREC : 1KHz, 8 dBs sine wave signal in SP mode, n
5、ormalVHS modePB : REC then playback it3) Movie Camera circuitsMeasured using a correctly illuminated gray scale or colourbar test chatrs in the E-E mode4) Indication on schematic diagramWaveform indications on the schematic diagram are asshown below.5) Waveform indicationsWaveform numberWF25REC/PB 1
6、.2 Vp-p50 mV/2 msec/DIVWaveform name ormeasurement pointLevel : 1.2 Vp-pALC OUTMode : REC or PB modesOscilloscope Volts and Time/Division, Probe 10 : 112 32.5(5.0)1.8PB and REC modes(Voltage of PB and REC modesare the same)PB modeREC mode3. Interpreting Connector indications1231231231423Removable co
7、nnectorWire soldered directly on boardNon-removable Board connectorBoard to BoardConnected pattern on boardThe arrows indicate signal path4. Voltage measurement1) Video circuitsREC : Colour bar signal in SP mode, normal VHS modePB : Alignment tape, colour bar SP mode, normal VHSmode : Unmeasurable o
8、r unnecessary to measure2) Audio circuitsREC : 1KHz, 8 dBs sine wave signal in SP mode, Nor-mal VHS modePB : REC then playback it3) Movie Camera circuitsMeasured using a correctly illuminated gray scale or colourbar test charts in the E-E mode4-2CIRCUIT BOARD NOTES1. Foil and Component sides1) Foil
9、side (B side) :Parts on the foil side seen from foil face (pattern face)are indicated.2) Component side (A side) :Parts on the component side seen from component face(parts face) indicated.2. Parts location guidesParts location are indicated by guide scale on the circuit board.Note:For general infor
10、mation in service manual, please referto the Service Manual of GENERAL INFORMATION Edi-tion 4 No. 82054D (January 1994).6. Signal path SymbolsThe arrows indicate the signal path as follows.Playback signal pathPlayback and recording signal pathRecording signal path(including E-E signal path)Capstan s
11、ervo pathDrum servo path(Example)R-YYPlayback R-Y signal pathRecording Y signal path7. Indication of the parts for adjustmentsThe parts for the adjustments are surrounded with the circle asshown below.8. Indication of the parts not mounted on the circuit board“OPEN” is indicated by the parts not mou
12、nted on the circuitboard.R216OPENREF No. LOCATIONIC Category: ICHorizontal “A” zoneVertical “6” zoneB : Foil side(A : Component side)C : Chip component(D : Discrete component)IC101 B C 6A4.1BOARD INTERCONNECTIONS4-34-4HGFEDCBA4 5321# MARK ELEMENTS ARE NOT MOUNTEDp10291001a_rev11234567891011121323242
13、526192021221516171814UNREGGNDSHG_ST OPSP AHIDFS_PLLA TFIREC_MONENV_OUTPB_VCO GNDMAIN-VCOJLIP_RXAL_3VSYSJLIP_TXSBTSBDRSTVPPC_5VSBEGNDD_REG_3VJIG_MODVPPD_5VJIG_SPTJIG_SCK(F or ADJ .)CN110150/60Hz(DV SYSCONPage 4-39)(DV MSDPage 4-41)(DV MAINPage 4-43)(DV I/OPage 4-45)(DV V OUTPage 4-47)(AUDIO AD/DAPage
14、 4-49)(DV DSPPage 4-51)(VIDEO/AUDIOPage 4-7)(SYSCONPage 4-9)(SUB CPUPage 4-13)(TUNERPage 4-15)(VIDEO I/O SWPage 4-17)(AUDIO I/OPage 4-19)(CONNECTIONPage 4-21)(MDAPage 4-31)(PRE/RECPage 4-33)CN7001(Page 4-27)494847464544434241403938373635343332313029282726CN1CN2002CN7002CN5504CN3001CN7504CN7502CN7507
15、CN7501CN3011CN5321CN5501CN6701 CN6701CN511CN502CN7509CN1401CN501CN7506CN3003CN512CN851CN704CN7003CN5001CN3014FW7004CN1002CN5322CN5323CN703CN3501CN2601FW7006CN1CN5002CN7508CN1001CN1501CN5506CN1CN702CN5503CN5001CN5502CN5507CN3004CN2001CN513CN5505FW7005FW7008FW7003CN701CN1502FW7007CN3701CN5201CN2001CN5
16、325CN5301CN5324CN7503CN3002COMMONGNDFG1FG2DR UM_12VGND(M)DR UM_CTL_VD .PGD .FGGNDDEC_OUTRDEC_OUTLA.IN2RA.IN2LLINE_OUTRLINE_OUTLA.IN1RA.IN1LRCA_A.OUTRRCA_A.OUTLREAR1_C_INGNDREAR1_V_INGNDREAR2_V_INFR ONT_Y_INGNDFR ONT_C_INNCGNDGNDP A USEFR ONT_V_INFR ONT_ALFR ONT_ARJSA/SHUTTLE_AJSB/SHUTTLE_BGNDSHUTTLE
17、L/NCJ2/JOG_AJ1/JOG_BGNDTUNER_VIDEOGNDSWD_YSWD_CGNDTERM_D_CGNDTERM_D_YGNDTERM_C_OUTGNDGNDTERM_Y_OUTCHARA_D A T ALED1LED2LED3LED4LED5LED6RCU5VRC_INAL5VS. C L KS . D A T A_T OSYSSD A T A_FRSYSGNDB . UP_GNDDC3.5V-DC3.5V+STB-29VNCNCAL6VP . SA VELV . UPHP .CTLHM12VDR UM12VM12/17VGNDGNDGND-29VDC3.5V+4.5V(M
18、)GND(M) AL5V(DV)DEMOD(R)DEMOD(L)SW5VGNDCOMPSIFNCFscSW5VV_T O_OSDGNDREC_COLORSW5VPB_COLORV .PULSEMAIN_ALC_DETFR ONT_V_INGNDV_FR OM_A/VEELI2C_D A T A_A/VI2C_CLK_A/VGNDGNDC_T O _DIGIY/V_T O_DIGIY_FR OM_DIGIC_FR OM_DIGISECAM_PB_COLORY_T O_SUBP . MUTELWIDE_DETFR ONT_Y_INFR ONT_C_INREAR2_V_INCHARA_D A T A
19、Y_T O_VM12V DRUM12VM12/17V GND GND GNDDC3.5V-DC3.5V- -29V DC3.5V+ NCNCAL6VP.SAVELV.UPHP.CTLHY_FR OM_DIGIGNDKILLER_DETD .FFfscGNDC_T O _DIGISW5V2Y/V_T O_DIGIEELC_FR OM_DIGII2C_CLK_A/VI2C_D A T A_A/VV. P . C T LV .REFTRICKHSLO W_PULSEREAR1_Y_INGND GND GND GND GND GNDNCV_FROM_OSDC_OUTY_OUTREAR2_C_INREA
20、R2_Y_INREAR1_C_INGNDCCAP_FGCAP_CTL_VSW5VGNDMCAP_REVLNCMOTOR12VREAR2_Y_INY_OUTV_FR OM_OSDREAR1_Y_INGNDGNDGNDGNDGNDGNDREAR1_C_INBAIS_FOR_C_OUTREAR2_C_INC_OUT2fscOSD_CSS. C L KS . D A T A _ERSYSEDSH/I2C_CLK2EDS_CS/I2C_D A T A 2SWD_S . D A T ACHARA_D A T AP . MUTELV_FR OM_OSDSYNC_DETHOSD-INGNDV_T O _OSD
21、SW5VOSD_COSD_YSW12VD_P . MUTEHD_Y/V_IN#RXDTXDDAIL_PLAYDIAL_OFFDIAL_AUTOHOUSING_SWA UDIO(-)7VAL5VAL3.3VGNDAL3.3VGNDAL2.5VAL2.5VGNDFF/REW(H)D_Y_OUTD_Y/V_INGNDD_C_OUTGNDD_C_INGNDDVA REC (R)GND GNDGNDSW5VNCGNDGNDGNDCH+12VRF5VBT2GNDGNDGNDSW12VAL12VAUDIO(-)SW5VSW5V(2)48VAL5.8VGNDGNDSW5VSW5VGNDGNDGNDGND(M)
22、GND(GND)(GND)1SGNDGNDGND1F2F2SLO AD .MO T OR+LO ADMO T OR-GNDLSBLSCLSAGNDGNDD_REG2.9REG_5VA_REG2.9A_REG2.5PB_ENVREC_CTLA GC_GAINREF_CLKREC_HPBHHID1HID3GNDDUMP_CTLVREF_1.1A GC_OUTVRB_A G CA TF_GAINVRB_A T FA TF_INGNDREC_CLKREC_D A T ARECCADJMONI_CHGSW5VSW5VGNDGNDGNDR.ENC3R.ENC2R.ENC1GNDLIVENEUTRALSW5
23、VNCGNDGNDGNDGNDLEDGNDGNDDC3.5V+S.PROTECT48V12V4V4V4VBT2-29V6VDVAUDIO-6V6V17VDC3.5V-GNDGNDGNDGNDBB(AL5V)TU(30V)TU(30V)MB(SW5V)LOCK(L)SW1SW2AFTNCNCRECPBGND(C)A.ERASEGND(C)F A N12VGND4.5V(M)6V/3.2V(M)6VGND(M)AL5V(D V)SYS_GNDCH+12VI2C_CLK2I2C_D A T A2SCRHP50_I/OSECAM/MESECAMHOSD_P . CTLLB . BA CKHOUT1_L
24、2HOUT1_DHC . BO X/SA T_CTLSW5VSW12VLDM1LDM2EP CH1EP CH1EP CH2EP CH2SP CH1SP CH1SP CH2SP CH2FMA CH1FMA CH2FL Y . EFL Y . EFULL ERASECOIL VCOIL VCOIL WCOIL WCOIL UCOIL UMR VCCHG IN+HG V+HG V -HG U+HG IN-HG W -HG W+HG U-MR GNDFL Y . EFF/REW 6VMDA 6VEP CH2SP CH2SP CH1EP CH1FMA CH1FMA CH2I2C D A T AI2C C
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