Fostex-NF1A-as-sm(1)维修电路原理图.pdf

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1、NF-1NF-1AService ManualModelNEAR FIELD STUDIO MONITORSPEAKER SYSTEM&FOSTEX CORPORATION 3-2-35 Musashino, Akishima, Tokyo, Japan 196-0021FOSTEX CORPORATION OF AMERICA 15431 Blackburn Ave., Norwalk, CA 90650, U.S.A. PRINTED IN JAPAN FEB. 2000 8288790000RadioFans.CN 收音机爱 好者资料库NF-1 & NF-1ANF-1 & NF-1ASA

2、FETY INSTRUCTIONSRead instructions - All the safety and operating instruc-tions should be read before the appliance is operated.Retain instructions - The safety and operating instructionsshould be retained for future reference.Heed warnings - All warnings on the appliance and in theoperating instruc

3、tions should be adhered to.Follow instructions - All operating and use instructionsshould be followed.Water and Moisture - The appliance should not be usednear water - for example, near a bathtub, washbowl,kitchen sink, laundry tub, in a wet basement, or near aswimming pool, and the like.Carts and S

4、tands - The appliance should be used onlywith a cart or stand that is recommended by the manufac-turer.An appliance and cart combination should be moved withcare. Quick stops, excessive force, and uneven surfacesmay cause the appliance and cart combination to over-turn.Wall or Ceiling Mounting - The

5、 appliance should bemounted to a wall or ceiling only as recommended by themanufacturer.Ventilation - The appliance should be situated so that itslocation or position does not interfere with its proper ven-tilation. For example, the appliance should not be situ-ated on a bed, sofa, rug, or similar s

6、urface that may blockthe ventilation openings; or, placed in a built-in installa-tion, such as a bookcase or cabinet that may impede theflow of air through the ventilation openings.Heat - The appliance should be situated away from heatsources such as radiators, heat registers, stoves, or otherapplia

7、nces (including amplifiers) that produce heat.Power Sources - The appliance should be connected to apower supply only of the type described in the operatinginstructions or as marked on the appliance.Grounding or Polarization - The precautions that shouldbe taken so that the grounding or polarization

8、 means ofan appliance is not defeated.Power Cord Protection - Power supply cords should berouted so that they are not likely to be walked on orpinched by items placed upon or against them, payingparticular attention to cords at plugs, convenience recep-tacles, and the point where they exit from the

9、appliance.Cleaning - The appliance should be cleaned only as rec-ommended by the manufacturer.Nonuse Periods - The power cord of the appliance shouldbe unplugged from the outlet when left unused for a longperiod of time.Object and Liquid Entry - Care should be taken so thatobjects do not fall and li

10、quids are not spilled into the en-closure through openings.Damage requiring Service - The appliance should be ser-viced by qualified service personnel when:A.B.C.D.E.Servicing - The user should not attempt to service the ap-pliance beyond that described in the operating instruc-tions. All other serv

11、icing should be referred to qualifiedservice personnel.REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.CAUTIONRISK OF ELECTRIC SHOCKDO NOT OPENCAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,DO NOT REMOVE COVER (OR BACK).NO USER-SERVICEABLE PARTS INSIDE.TO PREVENT ELECTRIC SHOCK, MATCHWIDE BLADE OF PLU

12、G TO WIDE SLOT,FULLY INSERT.POUR VITER LES CHOCS LECTRIQUES,INTRODUIRE LA LAME LA PLUS LARGE DELA FICHE DANS LA BORNE CORRE-SPONDANTE DE LA PRISE ET POUSSERJUSQU AU FOND.CAUTION:ATTENTION:The exclamation point within an equilateraltriangle is intended to alert the user to thepresence of important op

13、erating and mainte-nance (servicing) instructions in the literatureaccompanying the appliance.The lightening flash with arrowhead symbol,within an equilateral triangle, is intended toalert the user to the presence of uninsulated“dangerous voltage” within the products en-closure that may be of suffic

14、ient magnitude toconstitute a risk of electric shock to persons.“WARNING”“TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOIS-TURE.”1.2.3.4.5.6.7.8.The power supply cord or the plug has been damaged;orObjects have fallen, or liquid has been spilled into theappli

15、ance; orThe appliance has been exposed to rain; orThe appliance does not appear to operate normally orexhibits a marked changed in performance; orThe appliance has been dropped, or the enclosuredamaged.9.10.11.12.13.14.15.16.17. NF-1A Block DiagramINPUT (UNBAL)-10dBVINPUT (BAL)+4dBu1: GND2: HOT3: CO

16、LD+3dBLO FREQ.60Hz-3dBHIGH FREQ.10kHz+3dB-3dB3kHzOFFHI-MID ATT.VOLHF POWERTWEETERWOOFERLF POWERTWEETERLEVEL-3dB0dB0dBON19RadioFans.CN 收音机爱 好者资料库NF-1 & NF-1ANF-1 & NF-1A Input PCB32841576576576328411719161820S110D796810241321225171916182024132122513278328413215432154J101INPUT (UNBAL)INPUT (BAL)-10dBV

17、+4dBuJ10214C50JUMPER3R10610K28732451R1088.2KC10210/16C10110/16L102BEADR10220KR10120KR10320KL101BEADR10710KR10420K+15VC1051/50C1061/50-15VC51NONU101ABA4560NC10447p CERC10347p CERC10710/16R10547KC1110.027 PESC1170.027 PESR11039KR11182KS110BR1131MR11443KR112430KU101BBA4560NC12010/16R11547KC13110/16R131

18、10KR13210KC1340.0022PESR13620KR1336.8KC1131/50-15V+15VR13418KR1354.7KU102ABA4560NC1121/50S130AR12147KC1220.015 PESR1223KC11810/16R1233KC1230.015 PESC1240.015 PESU102BBA4560NR1241.6KR127470R1251KC125NONR1264.7KC12610/16R12847KS120AVOL.R14010KAC12110/16U103BBA4560NR13947KR1294.7KR1204.7K-15V12J103TO P

19、OWER LEDJ104TO POWER AMP12345+15VR1172KC119NONC1321/50+15VU103ABA4560NR14110KBC11510/16C1331/50R11647K-15VR1183KC1141/50R1191.6KTWEETERLEV.HI-MID ATT.OFFONHI-FREQ.+3dB0dB-3dBLO FREQ.+3dB0dB-3dBC13610/16S130DR13720KC135NONS110ATABLE OF CONTENTSNF-1 owners manual: 8288457000 (for export & domestic mod

20、el)NF-1A owners manual: 8288459000 (for export model): 8288460000 (for domestic model)Parts List, exploded views and circuit diagrams are given in this manual to assist the servicetechnician in maintaining the Model NF-1 & NF-1A.NOTESThe following accessories are supplied with NF-1 as the standard a

21、ccessories.*Following is the packing material for the Model NF-1.*Carton, inner, 3 pads, NF-1: 8228739000Carton, outer, NF-1: 8228917000Sheet, mirror: 82167290001. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2. CONTROLS, INDICATORS & CONNECTORS . . . . . .

22、 . . . . . . . .3. EXPLODED VIEW, PCB ASSEMBLY & PARTS LIST . . . . . . . .4. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . .46717Following is the packing material for the Model NF-1A.*Carton, inner, NF-1A: 8228738000Carton, outer, NF-1A: 8228916000Packing, side, NF-1A: 8228

23、466001Packing, front, NF-1A: 8228466002Sheet, mirror: 8216729000183NF-1 & NF-1ANF-1 & NF-1A4171. SPECIFICATIONSEnclosure system2-way bass-reflex systemDrivers160 mm HP woofer x 1 (low-leakage type)20 mm Soft-Dome tweeter x 1 (low-leakage type)Impedance8 Frequency Response50 Hz 40 kHzCrossover Freque

24、ncy10 kHzSound Pressure Level89 dB/W (1 m)Input (Program)120 WEnclosure volume11 litersWeightApprox. 9.1 kg NF-1Specifications and physical appearance are subject to change without notice for product improvement.4000020000100005000200010005002001005020809070605040302010010HzdB10Second DistortionThir

25、d Distortion306040000200001000050002000100050020010050209010080706050403011010HzdB81632 4274 mm267 mm340 mm240 mm NF-1 Dimensions4. CIRCUIT & BLOCK DIAGRAMS Power Amp & SW PCB1245678910111113284157631211F1FUSEC506 47p CERR507 10KU502LM3886TFIN+OUT3+VIN-+38V+VNCGNDMUTE-VR506150C5051/50C5090.1 PESR509

26、10NCNCR5051KC508220p CER-38VR50820KTO LFSPEAKERJ502TO HFSPEAKER1234R51510KC51347p CER124567891011U510LM3886TFIN+OUT3+VIN-+38V+VNCGNDMUTE-VNCNC-38VC5170.1 PESR51620KC516220p CERU501BBA4560NC5110.0022 PESR5121KC512100/16R51010KR51110KC5100.0039 PESR50420KR50310KC5030.01 CERU501ABA4560NC5040.01 CERC502

27、0.0022 PES+15V-15VC5010.0022 PES+15V-15V12345W501TO INPUTR51710R513130+15V-38VC008100/16R004270 1/2W RF+38VU001DTC114ESR003470KQ0012SD1200FC0024700/63D002MTZJ15C00610/16C0041/50R0014.7KC00710/16D003MTZJ15Q0022SB889F-15VR0024.7KC0051/50C0034700/63-38VR005270 1/2W RFC013NOND001GBU6DCONN-M-03C014NONJ501123123T1TRANSFORMER POWERW6100V: GRY120V: BRN230V: VIO S1SW POWERW3W5W4C0110.0047C012NONL1BEAD 6HL2BEAD 6HJ001AC IN230V: 1A100/12V: 3.15AW1BRNBRNWHTGND