Frontman_15B_Service_Manual 电路图.pdf

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1、FRONTMAN 15B p/n 022-1503-000 (120 V) SERVICE MANUAL CONTENTS: Notices Specifications Parts lists: Theory of Operation PCB assembly Chassis Assembly Cabinet assembly Miscellaneous Schematics Service diagram Fender Musical Instruments Corp.,7975 North Hayden Road Scottsdale, AZ 85258 FRONTMAN 15B (Th

2、is is the model name for warranty claims) SERVICE MANUAL FEBRUARY 1997 IMPORTANT NOTICE: The information contained herein is CONFIDENTIAL and PROPRIETARY to Fender Musical Instruments Corp. It is disclosed solely for use by qualified technicians for purposes of equipment maintenance and service. It

3、is not to be disclosed to others without the expressed permission of Fender Musical Instruments Co. All specifications subject to change without notice. For warranty repair service, only Fender specified part numbers are to be used. It is recommended they also be used for post-warranty maintenance a

4、nd repair. Parts marked with an asterisk (*) indicate the required use of that specific part. This is necessary for RELIABILITY and SAFETY requirements. DO NOT USE A SUBSTITUTE! A coded naming convention is used in the description of certain parts. The codes and what they mean are as follows: CAPACI

5、TOR CODES HARDWARE CODES CAP AE=Aluminum ElectrolyticBLX=Black Oxide CAP CA=Ceramic AxialCR=Chrome Plated CAP CD=Ceramic DiskHWH=Hex Washer Head CAP MPF=Metalized Polyester FilmM=Machine Screw CAP MY=MylarNI=Nickel Plated CAP PFF=Polyester Film/FoilOHP=Oval Head Phillips PB=Particle Board RESISTOR C

6、ODESPHP=Pan Head Phillips PHPS=Pan Head Phillips Sems RES CC=Carbon CompSMA=Sheet Metal A Point RES CF=Carbon FilmSMB=Sheet Metal B Point RES FP=Flame ProofSS=Stainless Steel RES MF=Metal FilmTF=Thread Forming RES WW=Wire WoundZI=Zinc Plated 1 RadioFans.CN 收音机爱 好者资料库 FRONTMAN 15B SPECIFICATIONS Prod

7、uct Release No.:PR 359 (This is not a model number) PART NUMBER:22-1503120 V 22-1533240 V Aus 22-1543230 V UK 22-1563230 V 22-1573100 V 22-1583230 V Nord POWER AMPLIFIER SECTION: Power output:15 Watts Rated load impedance:8 Distortion at rated power:5% Power bandwidth:40 Hz to 20 kHz Compression ran

8、ge:19dB PREAMP SECTION: Input impedance:202k Ohms Sensitivity ( 1kHz):4mV at onset of compression Equalization range:HIGH +/- 15 dB at 8 kHz MID+/- 15 dB at 800 Hz LOW+/- 15 dB at 40 Hz PHYSICAL SPECIFICATIONS: Width:13-1/4 inches (34.3 cm) Height:15 inches(38.1 cm) Depth:9-3/4 inches(24.8 cm) Weigh

9、t:21 lbs.(9.5 kg) FRONTMAN 15B THEORY OF OPERATION The input circuitry is a low pass filter with the -3 dB down point at 22 kHz. This sets up the initial response of the amplifier and provides RF suppression. U1B is an Auto Pad. It provides excellent headroom and low noise. At upper volume control s

10、ettings, it also rolls off low frequencies at 219 Hz. U1A makes up the tone controls. They provide 15 dB of boost or cut at 40 Hz (Low), 800 Hz (Mid), and 8 kHz (High). U2B is a special tone shaping circuit used for sonic enhancement. U2A is a unity gain amplifier which drives the power amp stage. I

11、n conjunction with U4, it acts as the gain reduction circuit for the Deltacomp. The output of the power amplifier is sensed through R23 by the Comparator U5A. As the amplifier output approaches clipping, the output of U5A goes negative. This charges Capacitors C20-C23 through the time constant made

12、up with R41 (3.9K x 8.8F = 34.3mSec). This single-pole charge is the attack time for the Deltacomp. As the capacitors charge, the voltage at the base of transistor Q1 goes negative, turning on this Darlington device. Current from Q1 controls the output voltage of U4 (Operational Transconductance Amp

13、lifier). The output of U2A also drives the inverting input of U4. The inverted output from U4 mixes with the non-inverted input to U2A causing a cancellation effect. This attenuates the signal to the power amp, thus eliminating clipping. When the power amp output is reduced, the output U5A goes posi

14、tive. Blocking Diodes CR8-CR11 force the Capacitors to discharge through R40. This 4-pole discharge is the Release for the Deltacomp. The power amplifier is contained within U3. CR1 and CR2 keep the output centered during clipping. CR3 and CR4 provide flyback protection for the output of U3. 2 Radio

15、Fans.CN 收音机爱 好者资料库 FRONTMAN 15B PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY QTY PART # DESCRIPTION REFERENCE DESIGNATION 047499PCB ASSY BXR 15/ FRONTMAN 15B 9026517CAP AE AX2.2F50VC2,4,5,13,18,20,21,22,23 1038693CAP AE AX47F16VC15 2028471CAP AE RDL47F50V20%C26

16、,27 2033607CAP AE RDL2200F35V20%C24,25 1038703CAP CA.1F50VC12 1038873CAP CA22PF100VC14 1038699CAP CA100PF100VC3 1039259CAP CA220PF100VC1 1039260CAP CA270PF100VC10 1038700CAP CA390PF50VC6 1039267CAP CA3900PF100VC32 1038702CAP CA6800PF50VC7 1027286CAP MPF.47F63VC8 1033588CAP PFF RDL.01F100V10%C16 1033

17、591CAP PFF RDL.033F100V10%C19 4033592CAP PFF RDL.047F100V10%C28,29,30,31 1038656CONTROL 10KB SNAP INR7 3038655CONTROL 50KB W/CD SNAP INR8,9,10 6064089DIODE 1N4003CR3,4,15,16,17,18 9006260DIODE 1N4448/1N914B SIGNALCR1,2,5,6,8,9,10,11,12 2047140DIODE ZEN 1N5349B 12V 5WCR13,14 2025996FUSE CLIP PCB .250

18、 & 5MM FUSEXF1 1068411FUSE QA 1-1/4X1/4 250V 0.5AF1(100/120V ONLY) 1020781FUSE QA 20mm x 5mm 250V .25AF1 (230V EXPORT ONLY) 1041952HEATSINK BRONCO 1027404IC CA3080AE OTAU4 3016795IC DUAL OP AMP TL072U1,2,5 1029912IC POWER AMP PC1188H 20WU3 1041988INSULATOR MICA 10 PIN SIPAT HEATSINK 2037036JACK PHON

19、E PCB MONO CA PREMIUMJ1,3 1031570JACK PHONE PCB STEREO PREMIUMJ2 9020888JUMPER WIRE 22GA. .5X.175W1,2,3,4,5,6,7,8,9 1028039LED RED 5X5MM SLB-55VR3LD1 1047499PCB ASSY BXR 15(STUFFED) 1047498PCB FAB BXR 15(RAW BOARD) 1024952RES CF1/4W5%100R31 2024959RES CF1/4W5%330R5,45 2024965RES CF1/4W5%1KR19,48 202

20、4971RES CF1/4W5%2.2KR11,14 2024972RES CF1/4W5%2.7KR6,34 1024975RES CF1/4W5%3.9KR41 FRONTMAN 15B PARTS LIST PRINTED CIRCUIT BOARD ASSEMBLY CONTINUED QTY PART # DESCRIPTION REFERENCE DESIGNATION 1024977RES CF1/4W5%4.7KR36 1028948RES CF 1/4W5%6.2KR32 1024980RES CF1/4W5%8.2KR23 5024981RES CF1/4W5%10KR15

21、,25,26,28,30 5024989RES CF1/4W5%33KR1,4,24,27,29 2024993RES CF1/4W5%47KR18,21 4028990RES CF1/4W5%51KR37,38,39,40 1024996RES CF1/4W5%82KR12 1024997RES CF1/4W5%100KR20 1024998RES CF1/4W5%120KR33 1024999RES CF1/4W5%150KR13 2025059RES CF1/4W5%220KR3,17 1025061RES CF1/4W5%330KR16 1025069RES CF1/4W5%1MR2

22、1029083RES CF1/2W5%10R22 1026549RES CF1/2W5%1.5KR42 4028045RES FILM1W5%220R43,44,46,47 2027638SCRW TF 4-40X3/8 HWHS ZI .1HDAT HEATSINK 2032908SCRW TF 6-32X3/8 PHP ZIAT HEATSINK 19904701440SPACER LED .7X.125 BLUEAT LD1 1014408XSTR PNP MPSA63 TO-92Q1 CHASSIS ASSEMBLY QTY PART # DESCRIPTION REFERENCE D

23、ESIGNATION 051212CHASSIS ASSY FRNTMAN 15B 4033206BUSHING KNOB SPACER( CONTROLS) 1007565BUSHING SR.625X.125X37/64 BLK( POWER CABLE) 1026527CABLE ASSY PWR 120V.187 TABS 1022491CLAMP CABLE NYL SCRW MNT 5/16 4026402KNOB POINTER BLACK 1047502PANEL FRONT BXR 15 1048440PLATE REAR BXR 15 1038900SCRW TF 6-32

24、X1/4 PHP ZI( GROUND LUG) 2037353SCRW TF 6-32X3/4 PHP ZI(PCB MOUNT) 1051100PANEL FRONT FRONTMAN 15B 1051330CABLE ASSY 120V 6 FT 3 RadioFans.CN 收音机爱 好者资料库 FRONTMAN 15B PARTS LIST CHASSIS ASSEMBLY CONTINUED QTY PART # DESCRIPTION REFERENCE DESIGNATION 5032908SCRW TF 6-32X3/8 PHP ZI(XFMR/HEATSINK MOUNT)

25、 2047040STANDOFF NYLON PCB SNAPIN 1/2 1025935SWITCH DPST .187 TAB (DOM)(POWER SWITCH) 5026459WSHR FLAT 6X3/8 ZI 1025413XFMR POWER F1158UC SQ15 FOJ(120V DOMESTIC) 1041775XFMR POWER EXPORT 100V(100V JAPAN) 1031634XFMR POWER FD15 230V(230V EXPORT) CABINET ASSEMBLY QTY PART # DESCRIPTION REFERENCE DESIG

26、NATION 1051168CAB ASSY FRNTMAN 15B 4026566CORNER 2 HOLE W/TAB NI 4029071CORNER NOTCHED NICKEL (FD) 4041549GLIDE PRESS-IN .75 DIA 2036199SCRW M 8-32X1-3/16 OHP BLX CP(CHASSIS SIDE MOUNT) 4029828SCRW PB 8X3/4 PHP ZI 2018113SCRW SMA 4X1/2 OHP BLX(LOGO MOUNT) 4016627SCRW SMA 8 x 3/4 OHP BLX 16026571SCRW

27、 SMAB 8X5/8 THP NI(CORNER MOUNT) 4029527WSHR FNSH 8-5/8 FLNGD BLX WX(CHASSIS MOUNT) MISCELLANEOUS QTY PART # DESCRIPTION REFERENCE DESIGNATION 1051153MANUAL OWNERS FRNTMAN 15B 1047496SCHEMATIC REDUCED BXR 15 .95051204FOAM TAPE 1/4 x 1/16 3m4516 TOP & BOTTOM OF GRILLE 1051169GRILLE METAL BLK FRNTMAN 15B 2025395HANDLE CAP 1 HOLE NI 1029906NAMEPLATE GENERIC SMALL 1025883HANDLE SHORT NO LOGO 2022277SCRW M 10-32X1-1/2 OHP NI(HANDLE/CHASSIS MOUNT) 4026800SCRW SMAB 8X1-3/4 OHP BLX(GRILLE/BAFFLE MOUNT) 1025421SPEAKER 8 INCH PF8643 4