Fender_blues_junior_service_manual 电路图 维修原理图.pdf

BLUES JUNIOR SERVICE MANUAL CONTENTS: Notices Specifications Theory of operation Parts lists: PCB assembly Chassis assembly Cabinet assembly Miscellaneous Schematics/Service diagram Fender Musical Instruments Corp., 8860 E. Chaparral Road Suite 100 Scottsdale, AZ 85250 收音机爱好者资料库 Ra d i o Fa n s .CN BLUES JUNIOR SERVICE MANUAL NOVEMBER 1995 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 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 and repair. Parts marked with an asterick (*) 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: CAPACITOR 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 CODESPHP=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 收音机爱好者资料库 Ra d i o Fa n s .CN BLUES JUNIOR SPECIFICATIONS TypePR 295 Input impedance:1M ohm Power output:15 Watts R.M.S. 5% T.H.D Rated load impedance:8 Ohms Speaker complimentOne 8 ohm 12 Eminence, replica of Jenson P-10 Dimensions: Height:16inches(41 cm) Width:18inches(46 cm) Depth:9-13/16 inches(25 cm) Weight:31 lbs.(14 kg) THEORY OF OPERATION J1 is a high-sensitivity input with an input impedance of about 1M. V1B is the first gain stage which also contains the FAT switch. The FAT feature is activated by grounding the node between bypass capacitor C3 and R9. Via the FAT switch (S1) or the optional footswitch, the junction of R52 and R54 can be grounded. With zero volts applied to the gate of Q1, the JFET will essentially ground C3, activating the FAT feature. The output of V1B couples to the VOLUME control (R7). The VOLUME control is actually a preamp overdrive control that adjusts the level of distortion. C2 attenuates high frequencies and C1 attenuates low frequencies at high distortion settings. This takes the edge off the distortion and prevents the speaker from flapping. V1A provides a gain of about 40, and drives the tone control circuitry. After the tone controls, the signal is fed to V2B, which drives the MASTER volume control (R41). From the MASTER volume, the signal splits to feed the power amplifier and the Reverb. U1A makes up a typical solid-state reverb drive circuit. U1B is the reverb recovery or sense circuit, which drives the REVERB control (R51). The reverb signal is summed with the dry signal at C6, which couples to the input of the Phase Inverter (V3). The output tubes (6BQ5/EL84) are arranged in a push-pull configuration that will produce fifteen (15 ) watts R.M.S. into eight (8) ohms 5% THD, 1kHz. The output bias is derived from the -15Vdc supply. The voltage divider at R31 & R37 determines the bias voltage (-10.7 Vdc). C14 filters the ripple to 1mV or less. 收音机爱好者资料库 Ra d i o Fa n s .CN BLUES JUNIOR PARTS LIST PRINTED CIRCUIT BOARD ASSEMBLY QTY PART # DESCRIPTION REFERENCE DESIGNATION 1049306001PCB ASSY BLUES JUNIOR ALL V(STUFFED) 1028104000BUTTON PUSH SWITCH BLACK( S1) 2047093000CABLE 6 CKT 3.2CJ1,3 3029533000CABLE JMPR 22GA 4 CKT 3.2CJ2,4,5 1028577000CABLE REVERB 30( P1,2,3,4) 1038689001CAP AE AX .47F100VC23 3009512001CAP AE AX22F25V20%C3,4,21 3024819000CAP AE AX22F500VC10,17,18 1041589000CAP AE AX47F500V20%C15 1028474000CAP AE RDL100F25V20%C14 2028479000CAP AE RDL220F25V20%C29,30 2028489000CAP AE RDL470F50V20%C27,28 1039255001CAP CA10PF100VLLC24 1020909000CAP CD47PF1000V10%C33 1069724000CAP CD100PF1000V10% C&FC2 1020917000CAP CD250PF1000V10%C25 1020867000CAP CD330PF1000V10%C20 1017620000CAP CD1500PF1000V10%C35 1039265001CAP CA2200PF100VLLC22 2026202000CAP PFF.0022F600VC1,16 1033581000CAP PFF RDL .0033F100V10%C26 1033588000CAP PFF RDL.01F100V10%C31 2024823000CAP MPF RDL.01F400V10%C6,34 1036234000CAP PFF RDL.015F100V10%C12 4024833000CAP MPF RDL.022F400V10%C8,9,11,13 1024839000CAP MPF.033F400VC19 2024853000CAP MPF RDL.1F250V10%C5,7 1024855000CAP MPF RDL.1F630V10%C32 1049402000CONTROL 25K B SNAPINR29 2034719000CONTROL 50KB SNAP INR41,51 1041913000CONTROL SNAPIN 250K 10AR8 1040985000CONTROL SNAPIN 250K BR28 1049401000CONTROL 1M 10AR7 2064089001DIODE 1N4003 LLCR5,7 4026730001DIODE 1N4006 800V LLCR1,2,3,4 2006260001DIODE 1N4448 SIGNAL LLCR6,12 2029690001DIODE HV 3KV 200MA LLCR10,11 2009165001DIODE ZEN 1N4744A 15V 1W 5%CR8,9 16025802000FSTN TAB MALE .250X.032 PCB MTCP1-13,16-18 2031041000FSTN TAB ML RTANG PCB .25X.032CP14,15 2025996000FUSE CLIP PCB .250 & 5MM FUSEXF1 1048827FUSE QA 1-1/4X1/4 250V 2AF1(100V/120V ONLY) 1020789FUSE QA 20mmX5mm 250V 1 AMPF1(230/240V EXPORT ONLY) 1016795IC DUAL OP AMP TLO72U1 1030771JACK 1/4 PCB 2/CD SCCJ2 (SPEAKER JACK) 1027674JACK 1/4 PCB 2/CD SCC INSLJ3 (FOOTSWITCH JACK) 1037036JACK PHONE PCB MONO CA PREMIUMJ1 (INPUT JACK) 26020888001JUMPER WIRE 22GA .5W1-26 1048332LED RED PNL MT 7LD1 1049305PCB FAB BLUES JUNIOR(RAW BOARD) 1024947001RES CF 1/4W5%47LLR45 1024964001RES CF 1/4W5%280LLR15 5024969001RES CF 1/4W5%1.5KLLR4,11,20,23,38 1029005001RES CF 1/4W5%2KLLR49 BLUES JUNIOR PRINTED CIRCUIT BOARD ASSEMBLY (CONT) QTY PART # DESCRIPTION REFERENCE DESIGNATION 2024977001RES CF 1/4W5%4.7KLLR16,46 1025942001RES CF 1/4W5%7.5KLLR26 1026510001RES CF 1/4W5%9.1KLLR18 3024981001RES CF 1/4W5%10KLLR1,30,48 3024987001RES CF 1/4W5%22KLLR31,52,54 2024989001RES CF 1/4W5%33KLLR13,37 1028153001RES CF 1/4W5%75KLLR27 2024997001RES CF 1/4W5%100KLLR6,9 1024998001RES CF 1/4W5%120KLLR44 1028955001RES CF 1/4W5%130KLLR5 3025059001RES CF 1/4W5%220KLLR21,22,42 1025061001RES CF 1/4W5%330KLLR50 1025828001RES CF 1/4W5%430KLLR40 2025065001RES CF 1/4W5%470K LLR47,56 1029618001RES CF 1/4W5%910K LLR43 4025069001RES CF 1/4W5%1MLLR2,12,14,53 2041741001RES MOX FP 1/2W 5%47R35,36 2028580001RES MOX FP 1/2W 5%100R24,25 1025829001RES CF 1/2W5%150LLR34 1031065001RES CF 1/2W5%91KLLR17 4025116001RES CF 1/2W5%100KLLR3,10,19,39 2031067001RES FILM 1W5%750LLR57,58 2027349001RES FILM 1W5%10KLLR33,55 1041258RES CF 2W5%2.2KR32 1028091SWITCH PUSH SLFLK SHORT STROKES1 5029167TUBE SOCKET 9 PIN PCB MOUNTXV1-5 1014689XSTR N-CH JFET J111 TO-92Q1 CHASSIS ASSEMBLY QTY PART # DESCRIPTION REFERENCE DESIGNATION 1049307CHS ASSY BLUES JUNIOR 120V(COMLETE CHASSIS) 1047560BRACKET TUBE RETAINER PRO. JR.( V4,5) 2018022BUSHING SNAP 5/16X17/32 BLK( OUTPUT TRANSFORMER) 1026116BUSHING SR .500X.063X7/16 BLK( REVERB CABLE) 1026038BUSHING SR. .625X.062X37/64BLK( POWER CABLE) 1010401BUSHING SR .625X.125X37/64 WHT( 230V & U.K. POWER CABLE) 1026541CABLE ASSY PWR W/.250 TAB 120V(POWER CABLE 120V ONLY) 1048463CABLE ASSY PWR .250 TAB 100V(POWER CABLE 100V ONLY) 1033331CABLE ASSY PWR 220/240V(POWER CABLE 230V ONLY) 1038602CABLE ASSY PWR AUST .250 TAB(PWR CABLE AUSTRALIA 240V) 1040993CABLE ASSY PWR 5A U.K.250 TAB(P CABLE UNITED KINGDOM 240V) 1049101CHS BLUES JUNIOR(RAW CHASSIS) 6041710KNOB POINTED PUSH ON BLK 1027288LENS LED RED( LD1) 2016352NUT HEX 3/8-32X3/32 TK NI( SPEAKER & FOOTSWITCH JACK) 9097360NUT HEX 4-40 EX LOCK(TUBE PCB MOUNT) 4022004NUT KEPS #8-32 ZINC(POWER TRANSFORMER MOUNT) 1049102PANEL FRONT BLUES JUNIOR(CHROME PANEL UNDER KNOBS) 1049300PANEL REAR BLUES JUNIOR( BACK OF CABINET) 9031188SCRW M 4-40X1/4 PHPS ZI W/WSHR(TUBE PCB TO CHASSIS MOUNT) 4038900SCRW TF 6-32X1/4 PHP ZI(GND LUG & OUTPUT XFMR MOUNT) 7037353SCRW TF 6-32X3/4 PHP ZIMAIN PCB TO CHASSIS MOUNT) 2039371SPRING, EXTENSION 1.81X.15( V4,5) 9038519STANDOFF M/F 4-40 X 1/4L(TUBE PCB TO CHASSIS MOUNT) 7047040STANDOFF NYLON PCB SNAPIN 1/2(PCB MOUNT) BLUES JUNIOR CHASSIS ASSEMBLY (CONT) QTY PART # DESCRIPTION REFERENCE DESIGNATION 1036570SWITCH TOGGLE DPST W/NUTSS1 (POWER SWITCH) 3013341TUBE 7025/12AX7WA RUSSIAN MADEV1,2,3 2041255TUBE 6BQ5/EL84V4,5 2990430092WASHER FLAT .482X.709 NI( INPUT JACK & POWER SWITCH) 2990430010WASHER LCK INTL 3/8X.681X.032( SPEAKER & FOOTSWITCH JACK) 1049969XFMR OUTPUT 15WT1 1049967XFMR PWR BLUES JUNIOR 120VT2(120V ONLY) 1049968XFMR PWR BLUES JUNIOR EXPORTT2(100V,115V,230V,240V) CABINET ASSEMBLY QTY PART # DESCRIPTION REFERENCE DESIGNATION 1049103CAB ASSY BLUES JR TWEED(COMPLETE CABINET) 1049103020BACK ASSY BLUES JR TWEED(BACKBOARD) 1038566CABLE ASSY SPKR RT ANG 13-1/2(SPEAKER CABLE) 1022491CLAMP CABLE NYL SCREW MNT 5/16 .3360036131CLOTH GRILLE VINTAGE TYPE 4029821EYELET RFLNGD .215 OD X.315 L(REVERB PAN MOUNT) 40415490GLIDE PRESS-IN .75 DIA 1049103010GRILLE BAFFLE ASSY BLUES JR(COMPLETE GRILLE) 1048534HANDLE 8 3/4 LEATHER BROWN 2036478HANDLE CAP NI 1041929NAMEPLATE FENDER TWEED AMPS 4069393NUT 6-32 HEX EXT LOCK(GRILLE MOUNT) 4021972NUT T 10-32X3/4 STR 3 PRNG BLX(SPEAKER MOUNT) 4064162NUT T 8-32X1/2 STR 3 PRNG BLX(HANDLE MOUNT) .0010036650PIN ESCUTCHEON #18X3/8 NI(NAMEPLATE MOUNT) 1028055REVERB UNIT 800 OHM 8EB2C1B DN(PAN) 4026577SCREW M 10-32X1 PHP BLX(SPEAKER MOUNT) 4036619SCREW M 10-32X1-1/2 THP NI(CHASSIS MOUNT) 6015990SCREW M 10-32X3/4 THP NI(BACKBOARD MOUNT) 4036618SCREW M 6-32X1-1/2 OHP BRONZ(GRILLE MOUNT) 4026419SCREW M 8-32X1 PHP STL NI(HANDLE MOUNT) 5029828SCREW PB 8X3/4 PHP ZI(REVERB PAN & CABLE CLAMP MNT) 1037617SPEAKER 12 8 OHM 50 WATTS 1.036036343TOLEX TWEED 4022327WASHER FLAT 8X7/16 NI MISCELLANEOUS QTY PART # DESCRIPTION REFERENCE DESIGNATION 1049312MANUAL OWNERS BLUES JUNIOR 1049302SCHEM REDU W/SCV DIA BLS JR SUPPLEMENT TO: BLUES JUNIOR p/n 021-3105-000 (120V) SERVICE MANUAL Reason for supplement: Reverb improvements and improved manufacturability require changes to the PCB and to the BOM. This supplement contains parts lists and schematics of the new circuitry. Please file it with your original service manual. CONTENTS: Parts lists: PCB assembly Schematics/diagrams Fender Musical Instruments Corp. 7975 North Hayden Road Scottsdale, AZ 85258 SUPPLEMENT TO: BLUES JUNIOR PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY QTY PART # DESCRIPTION REFERENCE DESIGNATION 30029533000CABLE JMPR 22GA 4 CKT 3.2PW2 PW4 PW5 20050687000CABLE JMPR 6 CKT .156 ROUNDPW1 PW3 10028577000CABLE REVERB 30 WJ1-4 10038689001CAP AE AX .47uF 100V 20%C20 20009512001CAP AE AX 22uF 25V 20%C4 C18 30051720000CAP AE AX 22uF 450V 20%C26-28 10038693001CAP AE AX 47uF 16V 20%C1 10051719000CAP AE AX 47uF 450V 20%C25 10028474003CAP AE RDL 100uF 25V 20%C33 20028479003CAP AE RDL 220uF 25V 20%C31 C34 20028489000CAP AE RDL 470uF 50V 20%C30 C32 10038698001CAP CA 47pF 100VC21 10039265001CAP CA 2200pF 100VC19 10051457003CAP CD 100pF 500V 5%C3 10051458003CAP CD 470pF 500V 10%C17 10020909000CAP CD 47pF 1000V 10%C14 10020917000CAP CD 250pF 1000V 10%C5 10017620000CAP CD 1500PF 1000V 10%C9 20024823000CAP MPF RDL .01uF 400V 10%C11 C29 40024833000CAP MPF RDL .022uF 400V 10%C6-7 C15-16 10024839000CAP MPF RDL .033uF 400V 10%C10 20024853000CAP MPF RDL .1uF 250V 10%C12-13 10024855000CAP MPF RDL .1uF 630V 10%C24 20026202002CAP PFF .0022uF 400V 10%C2 C8 10033581003CAP PFF RDL .0033uF 100V 10%C23 10033588003CAP PFF RDL .01uF 100V 10%C35 10036234003CAP PFF RDL .015uF 100V 10%C22 10049402000CONTROL SNAPIN 25k BR14 Middle 20034719000CONTROL SNAPIN 50k BR19 R45 Master, Reverb 10041913000CONTROL SNAPIN 250k 10AR13 Bass 10040985000CONTROL SNAPIN 250k BR12 Treble 10049401000CONTROL SNAPIN 1M 10AR5 Volume 20064089001DIODE 1N4003D5-6 40026730001DIODE 1N4006 800V 1AD1-4 30006260001DIODE 1N4448 SIGNALD9 D13-14 20029690001DIODE HV 3kV 200mAD11-12 20009165001DIODE ZEN 1N4744A 15V 1W 5%D7-8 160025802000FSTN TAB MALE .250 x.032 PCB MTP1-16 20031041000FSTN TAB ML RTANG PCB .25x.032P17-18 20025996000FUSE CLIP PCB 1/4 & 5mm DUALF1 10031611000IC OP-AMP DUAL PC4560U1 10030771000JACK 1/4 PCB 2/CD SCCJ3 Speaker 10027674000JACK 1/4 PCB 2/CD SCC INSLJ2 Footswitch 10037036000JACK PHONE PCB MONO PREMJ1 Input SUPPLEMENT TO: BLUES JUNIOR PRINTED CIRCUIT BOARD ASSEMBLY (CONT) QTY PART # DESCRIPTION REFERENCE DESIGNATION 10056975000LED RED PNL MT 7D10 10024947001RES CF 1/4W 5% 47ohm LLR39 10024964001RES CF 1/4W 5% 820ohm LLR24 50024969001RES CF 1/4W 5% 1.5k LLR4 R10 R17 R33-34 10029005001RES CF 1/4W 5% 2k LLR43 20024977001RES CF 1/4W 5% 4.7k LLR26 R40 10025942001RES CF 1/4W 5% 7.5k LLR25 10026510001RES CF 1/4W 5% 9.1k LLR29 40024981001RES CF 1/4W 5% 10k LLR2 R7 R15 R42 30024987001RES CF 1/4W 5% 22k LLR52 R57-58 20024989001RES CF 1/4W 5% 33k LLR21 R51 10024995001RES CF 1/4W 5% 68k LLR38 10028153001RES CF 1/4W 5% 75k LLR27 30024997001RES CF 1/4W 5% 100k LLR9 R11 R46 10028955001RES CF 1/4W 5% 130k LLR6 50025059001RES CF 1/4W 5% 220k LLR20 R31-32 R41 R44 10025828001RES CF 1/4W 5% 430k LLR18 50025069001RES CF 1/4W 5% 1M LLR1 R22-23 R37 R59 10025829001RES CF 1/2W 5% 150ohm LLR56 10031065001RES CF 1/2W 5% 91k LLR28 40025116001RES CF 1/2W 5% 100k LLR3 R8 R16 R30 20041741001RES MOX FP 1/2W 5% 47ohm LLR54-55 20028580001RES MOX FP 1/2W 5% 100ohm LLR35-36 20031067001RES FILM 1W 5% 750ohm LLR50 R53 20027349001RES FILM 1W 5% 10k LLR48-49 10041258001RES MOX 2W 5% 2.2k LLR47 10028091000SWITCH PUSH SLFLKS1 10028104000BUTTON PUSH SWITCH BLACKAT S1 50029167000TUBE SOCKET 9 PIN PCB MOUNTV1-5 REF0038519000STANDOFF M/F 4-40 x 1/4L REF0097360000NUT HEX 4-40 EX LOCK REF0047040000STANDOFF NYL PCB SNAP 1/2 BLK 10014689003XSTR N-CH JFET J111 TO-92Q1 10057276000PCB FAB BLUES JUNIOR REF0057275000SERVICE DIAGRAM