Sony-BKPFL751-dacb-sm 维修电路原理图.pdf

AUDIO A/D CONVERTER BOARDBKPF-L751MAINTENANCE MANUAL1st EditionSerial No. 10001 and HigherRadioFans.CN 收音机爱 好者资料库! WARNINGThis manual is intended for qualified service personnel only.To reduce the risk of electric shock, fire or injury, do not perform any servicing other than thatcontained in the operating instructions unless you are qualified to do so. Refer all servicing toqualified service personnel.! WARNUNGDie Anleitung ist nur fr qualifiziertes Fachpersonal bestimmt.Alle Wartungsarbeiten drfen nur von qualifiziertem Fachpersonal ausgefhrt werden. Um dieGefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind beiWartungsarbeiten strikt die Angaben in der Anleitung zu befolgen. Andere als die angegebenWartungsarbeiten drfen nur von Personen ausgefhrt werden, die eine spezielle Befhigungdazu besitzen.! AVERTISSEMENTCe manual est destin uniquement aux personnes comptentes en charge de lentretien. Afinde rduire les risques de dcharge lectrique, dincendie ou de blessure neffectuer que lesrparations indiques dans le mode demploi moins dtre qualifi pour en effectuer dautres.Pour toute rparation faire appel une personne comptente uniquement.BKPF-L751RadioFans.CN 收音机爱 好者资料库1 (E)BKPF-L751Table of ContentsManual StructurePurpose of this manual . 3 (E)Contents. 3 (E)Related manuals. 3 (E)1.Service Overview1-1.Notes on Repair Parts.1-1 (E)1-2.IC Link Replacement .1-1 (E)1-3.Name and Function of Switch/Indicator/etc. .1-2 (E)2.Electrical Alignment2-1.Electrical Alignment Overview.2-1 (E)2-1-1.Required Equipment and Tools.2-1 (E)2-1-2.Connection .2-1 (E)2-2.Preparation for Adjustment .2-2 (E)2-3.+5 V Power Supply Voltage Adjustment .2-2 (E)2-4.Word-clock Frequency Adjustment .2-3 (E)2-5.Input/Output Gain Adjustment.2-3 (E)2-6.CMRR (Common Mode Rejection Ratio) Adjustment.2-4 (E)3.Spare PartsADC-40 .3-1CN-1857/1858 .3-54.Semiconductor Pin Assignments5.Block DiagramOVERALL .5-12 (E)BKPF-L7516.Schematic DiagramsADC-40 .6-2CN-1857/1858 .6-87.Board LayoutsADC-40 .7-1CN-1857 .7-23 (E)BKPF-L751Purpose of this manualThis manual is the maintenance manual of Audio A/D Converter BoardBKPF-L751.This manual is intended for use by trained system and service engineers, anddescribes the information for periodic maintenance and detailed service.ContentsThis manual is organized by following sections.Section 1Service OverviewThis section explains the notes on repair parts and IC link replacement.Section 2Electrical AlignmentThis section explains the adjustment after replacing part.Section 3Spare PartsThis section describes the spare parts.Section 4Semiconductor Pin AssignmentsThis section describes the pin assignments of semiconductor.Section 5Block DiagramThis section describes the overall block diagram.Section 6Schematic DiagramsThis section describes the schematic diagrams of the ADC-40 and CN-1857/1858boards.Section 7Board LayoutsThis section describes the board layouts for the ADC-40 and CN-1857 boards.Related manualsThe following manual is prepared for this unit. . . . . Installation Manual (Supplied with BKPF-L751)This manual describes the information on BKPF-L751 installing.Manual Structure1-1 (E)BKPF-L751Section 1Service Overview1-2.IC Link ReplacementwAn IC link is critical parts to safe operation.Replace this component with Sony parts whose partnumbers appear in this manual published by Sony.If not, this may cause a fire or electric shock.Be sure to use the specified component in this manual.The IC link is mounted on the ADC-40 board. Be sure toreplace with the specified IC link as shown below afterremoving the foreign substances that may cause the shorts.ADC-40 BoardRef No. (Address)DescriptionPart No.PS1 (K-3)IC link 2 A!1-533-282-211-1.Notes on Repair Parts1.Safety Related Components WarningwComponents marked ! are critical to safe operation.Therefore, specified parts should be used in the case ofreplacement.2.Standardization of PartsSome repair parts supplied by Sony differ from thoseused for the unit. These are because of parts common-ality and improvement.Parts list has the present standardized repair parts.3.Stock of PartsParts marked with “o” at SP (Supply code) column ofthe spare parts list may not be stocked. Therefore, thedelivery date will be delayed.4.Units RepresentationThe following represented units are changed oromitted in writing.UnitsRepresentationCapacitanceuFuFInductanceuHuHResistanceZAbbreviationnFor the replacement of the ADC-40 board, please buyBKPF-L751 because ADC-40 mounted circuit board is notprepared for spare parts.1-2 (E)BKPF-L7511-3.Name and Function of Switch/Indicator/etc.Main Board (ADC-40 Board: Side A)Switches/gain adjusting VRs (Factory default settings are indicated by a mark)No. Ref. No.NameFunction!S1WORD SYNC SELECTSelects the output level of the regenerated-word-clock signal output to the REF VIDEO/WORD CLOCK (OUT) connector. NORMAL:1 V p-pHIGH:2.8 V p-p (using the traditional digital audio models)!;S375 Z75 Z termination ON/OFF switch for the REF VIDEO/WORD CLOCK IN connector. OFF: When using the loop-through connectionON:Otherwise!S4VIDEO SELECTSelects the signal method of the video reference input signal.(Valid only when S5 is set to VIDEO.) NTSC PAL: NTSC or PAL methodHD:HD method!S5REF SELECTSelects the reference signal input to the REF VIDEO/WORD CLOCK IN connector. VIDEO:Input the video reference (NTSC, PAL, or HD) signalWORD SYNC: Input the word-clock signal4S401CH1 600 ZSelects each input impedance of the audio signals input to the AUDIO IN connectors.6S402CH2 600 Z ON:600 Z8S403CH3 600 ZOFF: 20 k Z0S404CH4 600 Z!=S705CHANNEL SELECTSwitch the channel output to each connector of the AES/BEU OUT. NORMAL:CH1/2 8 No. 1, CH3/4 8 No. 2SWAP:CH3/4 8 No. 1, CH1/2 8 No. 25RV405CH1 GAINAdjusts the audio input level of the each channel within the range between _4 dB (+8 dBm7RV406CH2 GAINinput) and +14 dB (_10 dBm input).9RV407CH3 GAIN(At the factory-out, they were adjusted so as to convert an analog audio signal +4 dBm into a!-RV408CH4 GAINdigital audio signal _20 dB FS.)IndicatorsNo.Ref. No. NameColorFunction2D807REF INGreen/redGreen: When a reference video or word-clock signal is input to the REF VIDEO/WORD CLOCK IN connectorRed:When no signal is normally input to the REF VIDEO/WORD CLOCK INconnector (including the case where no signal is input)1D808_5 V WARNING Green/redGreen: A power of _5 V is normalRed:A power of _5 V is abnormal3D809WORD OUTGreenIndicates the setting of the LOOP/WORD switch (S1 on the CN-1857 board) of theconnector panel. (Indicates the function of REF VIDEO/WORD CLOCK (OUT) connector.)On:When the LOOP/WORD switch is set to the WORD CLK OUT position(The connector function is the regenerated word-clock signal output.)Off:When it is set to the LOOP THROUGH position(The connector function is the loop-through output.)D808D807D809RV405S401S402S403S404RV406RV407RV40832759!-4608ONONONONS3S4S1S5S705!1!=!;!NORMALNORMALSWAPVIDEOWORDSYNGHIGHHDNTSCPALOFFON1-3. Name and Function of Switch/Indicator1-3. Name and Function of Switch/Indicator1-3. Name and Function of Switch/Indicator/etc.2-1 (E)BKPF-L751Section 2Electrical Alignment2-1.Electrical Alignment Overview2-1-1. Required Equipment and ToolsUse the equipment listed below or the equivalent.ItemModelRemarksExtension boardEX-668 (Part No. A-8318-552-A)For PFV-L1EX-731 (Part No. A-8322-598-A)For PFV-L10Analog audio signal generator *Tektronix SG505 (Option 02)Audio level meter *Interface unitSony PFV-L1 or PFV-L10Audio D/A convertor board *Sony BKPF-L752Factory default conditionDigital voltmetor *Frequency counter *Advantest TR5821AKOscilloscope *Tectronix 2465BAdjustment screwdriverInsulation typeTerminatorBNC type (feed-through), 75 ZResister (600 Z, within 1 %)with lead*: Use the equipment after calibration has been completed.2-1-2. ConnectionPFV-L1/L10 (Rear)PFV-L1/L10 (Side)Extension board EX-668/731(At Gain adjustment)(At CMRR adjustment)ADC-40 board+COM_OscilloscopeINCH2Frequency counterInputOUTCH2Analog audio signal generator+COM_BKPF-L751BKPF-L752Digital voltmeter+_+_G+_G+_G+_G1234L751BKPF-L751*1*2IN(OUT)AUDIOINREF VIDEO/WORD CLOCKAES/EBUOUT+_G+_G+_G+_G1234L75212AUDIO OUTAES/EBU INAudio level mater600 Z+_InputTerminator2-2 (E)BKPF-L7512-2. Preparation for Adjustment2-3. +5 V Power Supply Voltage AdjustmentADC-40 Board (Side A)E10E1TP2TP1RV405S403S402S401S404RV406RV4071 RV4011 RV4021 RV4031 RV4041 RV11 RV2RV1000 1RV408ONONONONS3S4S1S5S705NORMALNORMALSWAPVIDEOWORDSYNGHIGH 0-5VHDNTSCPALOFFON2-2.Preparation for Adjustment1.Remove the connector panel of the BKPF-L751.2.Write down the customer setting of the switch S1(LOOP/WORD switch) on the CN-1857 board of theconnector panel in following table.3.Extend the ADC-40 board with a extension board.4.Write down the customer settings of each switch onthe ADC-40 board in following table.5.Set the switches on the CN-1857 and ADC-40 boardsas follows:BoardRef. No.Setting at adj.Customer(Address)settingCN-1857S1WORD CLK OUTADC-40S1 (H-2)NORMALS3 (K-2)ONS4 (J-3)NTSC PALS5 (G-1)VIDEOS401 (A-1)ONS402 (A-2)ONS403 (A-2)ONS404 (A-3)ONS705 (G-1)NORMAL6.Reattach the connector panel of the BKPF-L751.7.Install the audio D/A convertor board (BKPF-L752 ina factory default condition) to the interface unit.Factory default condition of BKPF-L752. DIP switch (S3/DAC-38 board): All OFFs. Adjust VRs (RV101, 201, 301, 401/DAC-38):Each VR was completed the adjustment so as toconvert a _20 dB FS to +4.0 dBm.8.Turn on the power of equipment, and warm up themfor about ten minutes.2-3.+ + + + +5 V Power Supply VoltageAdjustmentMeasuring equipment: Digital voltmeter1.Set the digital voltmeter as follows:Range: AUTOMode: DC V+ + + + +5 V adjustment for Digital line2.Connect the probe of the digital voltmeter as follows:+: TP1/ADC-40 (J-3)_: E1/ADC-40 (C-1)3.Adjust the voltage on the digital voltmeter.Adjustment point: 1RV1/ADC-40 (J-3)Specification:4.81 0.05 V dc+ + + + +5 V adjustment for Analog line4.Connect the probe of the digital voltmeter as follows:+: TP2/ADC-40 (G-3)_: E10/ADC-40 (G-2)5.Adjust the voltage.Adjustment point: 1RV2/ADC-40 (G-3)Specification:4.81 0.05 V dcnWhen adjusting the power supply voltage, be sure toperform Sections 2-4 and later.2-3 (E)BKPF-L7512-4. Word-clock Frequency Adjustment2-5. Input/Output Gain Adjustment2-4.Word-clock Frequency AdjustmentMeasuring equipment: Oscilloscope and Frequency counter1.Connect the oscilloscopes CH2 output to the frequen-cy counter.2.Connect the oscilloscopes CH2 input to the REFVIDEO/WORD CLOCK (OUT) connector.2.Set the oscilloscope as follows:CH2:DC 500 mV/DIVTIME:5 us/DIVTRIG:CH2, + slopeBand limit: ON3.Adjust the frequency on the frequency counter.Adjustment point: 1RV1000/ADC-40 (G-2)Specification:48,000 48 Hz4.Check the level on the oscilloscope with a 75 Zterminator.When the S1/ADC-40 (H-2) is set to NORMAL:Specification:A = 1.0 0.1 V p-pWhen the S1/ADC-40 (H-2) is set to HIGH 0-5V:Specification:B 2.4 V dc2-5.Input/Output Gain AdjustmentMeasuring equipment: Audio level meter1.Set the analog audio signal generator to +4.0 dBm,1 kHz.CH1/2 adjustment2.Connect the generator to the CH1 input of AUDIO INconnector.3.Connect the AES/EBU IN1 connector of the audioD/A converter board (BKPF-L752) to the AES/EBUOUT1 connector.4.Connect the audio level meter to the CH1 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).5.Adjust the CH1 output level on the audio level meter.Adjustment point: 1RV405/ADC-40 (A-1)Specification:4.0 0.1 dBm (at 600 Z load)6.Connect the generator to the CH2 input of AUDIO INconnector.7.Connect the audio level meter to the CH2 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).8.Adjust the CH2 output level.Adjustment point: 1RV406/ADC-40 (A-2)Specification:4.0 0.1 dBm (at 600 Z load)CH3/4 adjustment9.Connect the generator to the CH3 input of AUDIO INconnector.10. Connect the AES/EBU IN2 connector of the audioD/A converter board (BKPF-L752) to the AES/EBUOUT2 connector.11. Connect the audio level meter to the CH3 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).12. Adjust the CH3 output level.Adjustment point: 1RV407/ADC-40 (A-3)Specification:4.0 0.1 dBm (at 600 Z load)13. Connect the generator to the CH4 input of AUDIO INconnector.14. Connect the audio level meter to the CH4 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).15. Adjust the CH4 output level.Adjustment point: 1RV408/ADC-40 (A-3)Specification:4.0 0.1 dBm (at 600 Z load)n0 dBm = 0.755 VrmsS1 : NORMALAS1 : HIGH0 Vdc(GND)B2-4 (E)BKPF-L7512-6.CMRR (Common Mode RejectionRatio) AdjustmentMeasuring equipment: Audio level meter1.Set the analog audio signal generator to +18.0 dBm,60 Hz.Refer to Section 2-1-2 for the connection.CH1/2 adjustment2.Connect the generator to the CH1 input of AUDIO INconnector.3.Connect the AES/EBU IN1 connector of the audioD/A converter board (BKPF-L752) to the AES/EBUOUT1 connector.4.Connect the audio level meter to the CH1 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).5.Adjust the CH1 output level on the audio level meter.Adjustment point: 1RV401/ADC-40 (A-1)Specification:Minimum (_65 dBm or less)6.Connect the generator to the CH2 input of AUDIO INconnector.7.Connect the audio level meter to the CH2 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).8.Adjust the CH2 output level.Adjustment point: 1RV402/ADC-40 (A-2)Specification:Minimum (_65 dBm or less)2-6. CMRR (Common Mode Rejection Ratio) AdjustmentCH3/4 adjustment9.Connect the generator to the CH3 input of AUDIO INconnector.10. Connect the AES/EBU IN2 connector of the audioD/A converter board (BKPF-L752) to the AES/EBUOUT2 connector.11. Connect the audio level meter to the CH3 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).12. Adjust the CH3 output level.Adjustment point: 1RV403/ADC-40 (A-2)Specification:Minimum (_65 dBm or less)13. Connect the generator to the CH4 input of AUDIO INconnector.14. Connect the audio level meter to the CH4 output ofAUDIO OUT connector of the audio D/A converterboard (BKPF-L752).15. Adjust the CH4 output level.Adjustment point: 1RV404/ADC-40 (A-3)Specification:Minimum (_65 dBm or less)16. After turning off the power, reset the switches on theCN-1857 and ADC-40 boards to the customer settings.n0 dBm = 0.775 Vrms3-1BKPF-L751Section 3Spare Parts-ADC-40 BOARD- Ref. No. or Qty Part No. SP Description 1pc 3-179-084-01 s LEVER (R), PC BOARD or 3-179-085-01 s LEVER (L), PC BOARD 2pcs 7-685-547-14 s SCREW +BTP 3x10 C401 1-104-608-11 s ELECT, CHIP 33uF 20% 6.3V C402 1-104-608-11 s ELECT, CHIP 33uF 20% 6.3V C403 1-104-608-11 s ELECT, CHIP 33uF 20% 6.3V C404 1-104-608-11 s ELECT, CHIP 33uF 20% 6.3V C405 1-163-243-11 s CERAMIC, CHIP 47pF 5% 50V (2012) C406 1-163-243-11 s CERAMIC, CHIP 47pF 5% 50V (2012) C407 1-163-243-11 s CERAMIC, CHIP 47pF 5% 50V (2012) C408 1-163-243-11 s CERAMIC, CHIP 47pF 5% 50V (2012) C409 1-104-608-11 s ELECT, CHIP 33uF 20% 6.3V C410 1-104-608-11 s ELECT, CHIP 33u