Sony-BKPFL751-dacb-sm 电路图 维修手册.pdf

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1、AUDIO A/D CONVERTER BOARD BKPF-L751 MAINTENANCE MANUAL 1st Edition Serial No. 10001 and Higher RadioFans.CN 收音机爱 好者资料库 ! WARNING This 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 that contained

2、in the operating instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. ! WARNUNG Die Anleitung ist nur fr qualifiziertes Fachpersonal bestimmt. Alle Wartungsarbeiten drfen nur von qualifiziertem Fachpersonal ausgefhrt werden. Um die Gefahr eines elektris

3、chen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen. Andere als die angegeben Wartungsarbeiten drfen nur von Personen ausgefhrt werden, die eine spezielle Befhigung dazu besitzen. ! AVERTISSEMENT Ce manual est destin uni

4、quement aux personnes comptentes en charge de lentretien. Afin de rduire les risques de dcharge lectrique, dincendie ou de blessure neffectuer que les rparations indiques dans le mode demploi moins dtre qualifi pour en effectuer dautres. Pour toute rparation faire appel une personne comptente unique

5、ment. BKPF-L751 RadioFans.CN 收音机爱 好者资料库 1 (E)BKPF-L751 Table of Contents Manual Structure Purpose of this manual . 3 (E) Contents. 3 (E) Related manuals. 3 (E) 1.Service Overview 1-1.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

6、) 2.Electrical Alignment 2-1.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 Adjustm

7、ent.2-3 (E) 2-6.CMRR (Common Mode Rejection Ratio) Adjustment.2-4 (E) 3.Spare Parts ADC-40 .3-1 CN-1857/1858 .3-5 4.Semiconductor Pin Assignments 5.Block Diagram OVERALL .5-1 RadioFans.CN 收音机爱 好者资料库 2 (E)BKPF-L751 6.Schematic Diagrams ADC-40 .6-2 CN-1857/1858 .6-8 7.Board Layouts ADC-40 .7-1 CN-1857

8、 .7-2 3 (E)BKPF-L751 Purpose of this manual This manual is the maintenance manual of Audio A/D Converter Board BKPF-L751. This manual is intended for use by trained system and service engineers, and describes the information for periodic maintenance and detailed service. Contents This manual is orga

9、nized by following sections. Section 1Service Overview This section explains the notes on repair parts and IC link replacement. Section 2Electrical Alignment This section explains the adjustment after replacing part. Section 3Spare Parts This section describes the spare parts. Section 4Semiconductor

10、 Pin Assignments This section describes the pin assignments of semiconductor. Section 5Block Diagram This section describes the overall block diagram. Section 6Schematic Diagrams This section describes the schematic diagrams of the ADC-40 and CN-1857/1858 boards. Section 7Board Layouts This section

11、describes the board layouts for the ADC-40 and CN-1857 boards. Related manuals The following manual is prepared for this unit. . . . . . Installation Manual (Supplied with BKPF-L751) This manual describes the information on BKPF-L751 installing. Manual Structure 1-1 (E)BKPF-L751 Section 1 Service Ov

12、erview 1-2.IC Link Replacement w An IC link is critical parts to safe operation. Replace this component with Sony parts whose part numbers 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 m

13、ounted on the ADC-40 board. Be sure to replace with the specified IC link as shown below after removing the foreign substances that may cause the shorts. ADC-40 Board Ref No. (Address)DescriptionPart No. PS1 (K-3)IC link 2 A!1-533-282-21 1-1.Notes on Repair Parts 1.Safety Related Components Warning

14、w Components marked ! are critical to safe operation. Therefore, specified parts should be used in the case of replacement. 2.Standardization of Parts Some repair parts supplied by Sony differ from those used for the unit. These are because of parts common- ality and improvement. Parts list has the

15、present standardized repair parts. 3.Stock of Parts Parts marked with “o” at SP (Supply code) column of the spare parts list may not be stocked. Therefore, the delivery date will be delayed. 4.Units Representation The following represented units are changed or omitted in writing. UnitsRepresentation

16、 CapacitanceuFuF InductanceuHuH ResistanceZAbbreviation n For the replacement of the ADC-40 board, please buy BKPF-L751 because ADC-40 mounted circuit board is not prepared for spare parts. 1-2 (E)BKPF-L751 1-3.Name and Function of Switch/Indicator/etc. Main Board (ADC-40 Board: Side A) Switches/gai

17、n 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-p HIGH:2.8 V p-p (using the traditional digital audio models)

18、 !;S375 Z75 Z termination ON/OFF switch for the REF VIDEO/WORD CLOCK IN connector. OFF: When using the loop-through connection ON: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 method HD:HD method !S

19、5REF SELECTSelects the reference signal input to the REF VIDEO/WORD CLOCK IN connector. VIDEO:Input the video reference (NTSC, PAL, or HD) signal WORD SYNC: Input the word-clock signal 4S401CH1 600 ZSelects each input impedance of the audio signals input to the AUDIO IN connectors. 6S402CH2 600 Z ON

20、:600 Z 8S403CH3 600 ZOFF: 20 k Z 0S404CH4 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. 2 SWAP:CH3/4 8 No. 1, CH1/2 8 No. 2 5RV405CH1 GAINAdjusts the audio input level of the each channel within the range between _4 dB (+8

21、 dBm 7RV406CH2 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.) Indicators No.Ref. No. NameColorFunction 2D807REF INGreen/redGreen: When a reference video

22、 or word-clock signal is input to the REF VIDEO/ WORD CLOCK IN connector Red:When no signal is normally input to the REF VIDEO/WORD CLOCK IN connector (including the case where no signal is input) 1D808_5 V WARNING Green/redGreen: A power of _5 V is normal Red:A power of _5 V is abnormal 3D809WORD O

23、UTGreenIndicates the setting of the LOOP/WORD switch (S1 on the CN-1857 board) of the connector 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 outpu

24、t.) Off:When it is set to the LOOP THROUGH position (The connector function is the loop-through output.) D808 D807 D809 RV405 S401 S402 S403 S404 RV406 RV407 RV408 3 2 7 5 9 !- 4 6 0 8 ON ON ON ON S3 S4 S1 S5 S705 !1!=!;! NORMAL NORMAL SWAP VIDEO WORD SYNG HIGH HDNTSC PAL OFFON 1-3. Name and Functio

25、n of Switch/Indicator1-3. Name and Function of Switch/Indicator1-3. Name and Function of Switch/Indicator/etc. 2-1 (E)BKPF-L751 Section 2 Electrical Alignment 2-1.Electrical Alignment Overview 2-1-1. Required Equipment and Tools Use the equipment listed below or the equivalent. ItemModelRemarks Exte

26、nsion boardEX-668 (Part No. A-8318-552-A)For PFV-L1 EX-731 (Part No. A-8322-598-A)For PFV-L10 Analog audio signal generator *Tektronix SG505 (Option 02) Audio level meter * Interface unitSony PFV-L1 or PFV-L10 Audio D/A convertor board *Sony BKPF-L752Factory default condition Digital voltmetor * Fre

27、quency counter *Advantest TR5821AK Oscilloscope *Tectronix 2465B Adjustment screwdriverInsulation type TerminatorBNC type (feed-through), 75 Z Resister (600 Z, within 1 %)with lead *: Use the equipment after calibration has been completed. 2-1-2. Connection PFV-L1/L10 (Rear)PFV-L1/L10 (Side) Extensi

28、on board EX-668/731 (At Gain adjustment)(At CMRR adjustment) ADC-40 board + COM _ Oscilloscope IN CH2 Frequency counter Input OUT CH2 Analog audio signal generator + COM _ BKPF-L751 BKPF-L752 Digital voltmeter + _ + _ G + _ G + _ G + _ G 1 2 3 4 L751 BKPF-L751 *1*2 IN(OUT) AUDIO IN REF VIDEO /WORD C

29、LOCK AES/EBU OUT + _ G + _ G + _ G + _ G 1 2 3 4 L752 12 AUDIO OUT AES/EBU IN Audio level mater 600 Z + _ Input Terminator 2-2 (E)BKPF-L751 2-2. Preparation for Adjustment 2-3. +5 V Power Supply Voltage Adjustment ADC-40 Board (Side A) E10 E1 TP2TP1 RV405 S403 S402 S401 S404 RV406 RV407 1 RV401 1 RV

30、402 1 RV403 1 RV404 1 RV11 RV2 RV1000 1 RV408 ON ON ON ON S3 S4 S1 S5 S705 NORMAL NORMAL SWAP VIDEO WORD SYNG HIGH 0-5V HDNTSC PAL OFFON 2-2.Preparation for Adjustment 1.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

31、board of the connector panel in following table. 3.Extend the ADC-40 board with a extension board. 4.Write down the customer settings of each switch on the ADC-40 board in following table. 5.Set the switches on the CN-1857 and ADC-40 boards as follows: BoardRef. No.Setting at adj.Customer (Address)s

32、etting CN-1857S1WORD CLK OUT ADC-40S1 (H-2)NORMAL S3 (K-2)ON S4 (J-3)NTSC PAL S5 (G-1)VIDEO S401 (A-1)ON S402 (A-2)ON S403 (A-2)ON S404 (A-3)ON S705 (G-1)NORMAL 6.Reattach the connector panel of the BKPF-L751. 7.Install the audio D/A convertor board (BKPF-L752 in a factory default condition) to the

33、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 to convert a _20 dB FS to +4.0 dBm. 8.Turn on the power of equipment, and warm up them for about ten minutes. 2-3.+

34、+ + + +5 V Power Supply Voltage Adjustment Measuring equipment: Digital voltmeter 1.Set the digital voltmeter as follows: Range: AUTO Mode: DC V + + + + +5 V adjustment for Digital line 2.Connect the probe of the digital voltmeter as follows: +: TP1/ADC-40 (J-3) _: E1/ADC-40 (C-1) 3.Adjust the volta

35、ge on the digital voltmeter. Adjustment point: 1RV1/ADC-40 (J-3) Specification:4.81 0.05 V dc + + + + +5 V adjustment for Analog line 4.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) Specificati

36、on:4.81 0.05 V dc n When adjusting the power supply voltage, be sure to perform Sections 2-4 and later. 2-3 (E)BKPF-L751 2-4. Word-clock Frequency Adjustment 2-5. Input/Output Gain Adjustment 2-4.Word-clock Frequency Adjustment Measuring equipment: Oscilloscope and Frequency counter 1.Connect the os

37、cilloscopes CH2 output to the frequen- cy counter. 2.Connect the oscilloscopes CH2 input to the REF VIDEO/WORD CLOCK (OUT) connector. 2.Set the oscilloscope as follows: CH2:DC 500 mV/DIV TIME:5 us/DIV TRIG:CH2, + slope Band limit: ON 3.Adjust the frequency on the frequency counter. Adjustment point:

38、 1RV1000/ADC-40 (G-2) Specification:48,000 48 Hz 4.Check the level on the oscilloscope with a 75 Z terminator. When the S1/ADC-40 (H-2) is set to NORMAL: Specification:A = 1.0 0.1 V p-p When the S1/ADC-40 (H-2) is set to HIGH 0-5V: Specification:B 2.4 V dc 2-5.Input/Output Gain Adjustment Measuring

39、equipment: Audio level meter 1.Set the analog audio signal generator to +4.0 dBm, 1 kHz. CH1/2 adjustment 2.Connect the generator to the CH1 input of AUDIO IN connector. 3.Connect the AES/EBU IN1 connector of the audio D/A converter board (BKPF-L752) to the AES/EBU OUT1 connector. 4.Connect the audi

40、o level meter to the CH1 output of AUDIO OUT connector of the audio D/A converter board (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 IN connector.

41、 7.Connect the audio level meter to the CH2 output of AUDIO OUT connector of the audio D/A converter board (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 adjustment 9.Connect the generator to the CH3 input of AUDIO IN

42、 connector. 10. Connect the AES/EBU IN2 connector of the audio D/A converter board (BKPF-L752) to the AES/EBU OUT2 connector. 11. Connect the audio level meter to the CH3 output of AUDIO OUT connector of the audio D/A converter board (BKPF-L752). 12. Adjust the CH3 output level. Adjustment point: 1R

43、V407/ADC-40 (A-3) Specification:4.0 0.1 dBm (at 600 Z load) 13. Connect the generator to the CH4 input of AUDIO IN connector. 14. Connect the audio level meter to the CH4 output of AUDIO OUT connector of the audio D/A converter board (BKPF-L752). 15. Adjust the CH4 output level. Adjustment point: 1R

44、V408/ADC-40 (A-3) Specification:4.0 0.1 dBm (at 600 Z load) n 0 dBm = 0.755 Vrms S1 : NORMAL A S1 : HIGH 0 Vdc (GND) B 2-4 (E)BKPF-L751 2-6.CMRR (Common Mode Rejection Ratio) Adjustment Measuring equipment: Audio level meter 1.Set the analog audio signal generator to +18.0 dBm, 60 Hz. Refer to Section 2-1-2 for the connection. CH1/2 adjustment 2.Connect the generator to the CH1 input of AUDIO IN co