Fender Bassman 60 User manual

BASSMAN 60
p/n 022-4502-000 (120V)
SERVICE MANUAL
CONTENTS:
Notices
Specifications
Parts lists:
PCB assembly
Chassis assembly
Cabinet assembly
End item
Schematics/diagrams
Fender Musical Instruments Corp. 7975 North Hayden Road Scottsdale, AZ 85258

BASSMAN 60
(This is the model name for warranty claims)
SERVICE MANUAL
MARCH 2000
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 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:
CAPACITOR CODES HARDWARE CODES
CAP AE = Aluminum Electrolytic BLX = Black Oxide
CAP CA = Ceramic Axial CR = Chrome Plated
CAP CD = Ceramic Disk HWH = Hex Washer Head
CAP MPF = Metalized Polyester Film M = Machine Screw
CAP MY = Mylar NI = Nickel Plated
CAP PFF = Polyester Film/Foil OHP = Oval Head Phillips
PB = Particle Board
RESISTOR CODES PHP = Pan Head Phillips
PHPS = Pan Head Phillips Sems
RES CC = Carbon Comp SMA = Sheet Metal "A" Point
RES CF = Carbon Film SMB = Sheet Metal "B" Point
RES FP = Flame Proof SS = Stainless Steel
RES MF = Metal Film TF = Thread Forming
RES WW = Wire Wound ZI = Zinc Plated

BASSMAN 60
SPECIFICATIONS
Product Release No.: PR 421 (This is not a model number)
Part Number: 120V Version : 22-4502
240V Aus : 22-4532
230V UK : 22-4542
230V Eur : 22-4562
100V : 22-4572
Power Requirements: 180W
Power Amp Section
Power output: 60 Watts RMS into 8 Ω@ <1% THD
Sensitivity: .77V RMS
Preamp Section
Input impedance: Passive: 1MΩActive: 1MΩ
Sensitivity for full power: Passive: 18mV Active: 35mV
Nominal level: Passive: 160mV Active: 310mV
Tone Controls: Treble:+/-15 dB @ 5kHz
Semi-parametric control:} {Mid frequency: 150 to 1500 Hz}
{Mid level: +/-15dB @ Mid frequency setting}
Bass: +/-15 dB @ 50 Hz
Effects Loop:
Send impedance: 1kΩ
Return impedance: 22kΩ
Nominal level: +4dBu
Speaker Complement: One 8 ΩFender Special Design 12" woofer (P/N 0047539000)
One Piezo Horn (P/N 0053641000)
Dimensions: Height:20 1/2" (52.1 cm)
Width: 20" (50.8 cm)
Depth: 17 1/2" (44.5 cm)
Weight: 50 lbs. (22.5 kg)
Product specifications are subject to change without notice

BASSMAN 60
SERVICE NOTES
1. HORN REPLACEMENT requires speaker removal in order to access horn wiring. If wire ties,
clamps, etc. are removed for ease of connecting/disconnecting horn wires, these must be replaced to
prevent buzzing at higher power levels.
2. CHASSIS REMOVAL is accomplished by first removing six (4) screws from the top, and one (1)
screw from each side of the cabinet; then slide the chassis toward the rear just far enough to provide
access to the speaker wiring. Note: The speaker wires are tied to a chassis lance, and must be re-
tied after servicing (for safety compliance). Locate the speaker wires (white goes to P1, black goes to
P2 of the power-amp board) and disconnect them.
It should be noted that the speaker wires have been glued in place inside the speaker baffle (for sound
quality reasons), if this is disturbed during disassembly, it should be restored by removing the speaker, and
working through the speaker hole; leave sufficient slack to allow reassembly of the speaker leads to the
chassis.
For reference, the red wires from the transformer go to P3 & P5. The red/yellow wire goes to P4.
PARTS LIST
NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY
PRINTED CIRCUIT BOARD ASSEMBLY
QTY PART # DESCRIPTION REFERENCE DESIGNATION
7 0026517001 CAP AE AX 2.2uF 50V 20% C28-29 C42 C55-58
2 0038691001 CAP AE AX 4.7uF 50V 20% C2 C7
13 0025960001 CAP AE AX 22uF 16V 20% C5 C13 C20-22 C25 C30 C33-34 C37 C40 C43 C83
4 0049521000 CAP AE AX 47uF 50V 20% C48 C51 C71-72
1 0038694000 CAP AE AX 100uF 16V 20% C41
2 0031069003 CAP AE RDL 10uF 100V 20% C52-53
2 0041048000 CAP AE RDL 2200uF 50V 20% C69-70
5 0042001001 CAP CA 33pF 100V LL C6 C11 C19 C26-27
2 0039256001 CAP CA 68pF 100V LL C44-45
2 0038699001 CAP CA 100pF 100V LL C38 C60
2 0038874001 CAP CA 560pF 50V LL C23-24
2 0051405003 CAP CD 120pF 500V 5% C35-36
1 0051960003 CAP CD 180pF 500V 10% C1
15 0034788003 CAP CR .1uF 50V 20% .2" LS C31-32 C46-47 C59 C61 C74-82
1 0027255003 CAP MPF .001uF 100V 10% C12
1 0027257003 CAP MPF .0022uF 100V 10% C39
2 0027259003 CAP MPF .0033uF 100V 10% C10 C17
1 0027261003 CAP MPF .0047uF 100V 10% C18
1 0027262003 CAP MPF .0068uF 100V 10% C8
1 0027265003 CAP MPF .015uF 100V 10% C9
3 0027264003 CAP MPF .01uF 100V 10% C15 C49-50

BASSMAN 60
PRINTED CIRCUIT BOARD ASSEMBLY (cont)
QTY PART # DESCRIPTION REFERENCE DESIGNATION
1 0027270003 CAP MPF .033uF 100V 10% C16
3 0027272003 CAP MPF .047uF 63V 10% C62-63 C65
2 0052003003 CAP MPF .1uF 250V 10% C67-68
1 0053860000 CAP MPF .1uF 250VAC 20% C73
3 0027278003 CAP MPF .1uF 63V 10% C3-4 C54
3 0027286003 CAP MPF .47uF 63V 10% C14 C64 C66
1 0051020000 CTRL SNAPIN 100k 10C DUAL R32 (Mid-freq)
4 0034720000 CONTROL SNAPIN 100k B R14 R24 R27 R36 (Volume,Bass,Mid-level,Treble)
2 0064089001 DIODE 1N4003 LL D31-32
38 0006260001 DIODE 1N4448 SIGNAL LL D1-15 D17 D19-22 D25-27 D30 D33-39 D41-45 D47-48
4 0029045000 DIODE 6A 400V 6A4 LEAD FORMED D50-53
2 0025821001 DIODE HV FDH400 SWITCHING D23-24
2 0031729001 DIODE ZEN 1N5231B 5.1V 5% LL D28-29
2 0031635001 DIODE ZEN 1N5240B 10V 5% LL D16 D18
2 0028119000 DIODE ZEN 1N5353B 16V 5W 5% D54-55
3 0026000000 FASTON TAB, .187" P6 P8 P10
10 0025802000 FASTON TAB, .250" P1-5 P7 P9 P11-13
2 0020775000 FUSE CLIP PCB 5mm F1
3 0031611000 IC OP-AMP DUAL PC4560 U5 U8-9
5 0016795000 IC OP-AMP DUAL TL072 U1-4 U7
1 0027404000 IC OTA CA3080AE U6
1 0027387000 INDUCTOR AIR CORE RDL 2.5uH L1
2 0051658000 JACK MONO R/A J2 J4 (Speaker,Tuner)
3 0053450000 JACK STEREO R/A J1 J5-6 (Input,FX retrn,FX send)
1 0054261000 XLR CONNECTOR MALE RT ANGLE J3 (Line out)
1 0030755000 LED GREEN T-1 3mm DIFFUSED D56
3 0049948000 LED RED LONG LEAD LUMEX D40 D46 D49
4 0036178000 SPACER LED .5X.1 BRN A6192-1 @ D40 D46 D49 & D56
10055646000 PCB FAB. BASSMAN 60
6 0024937001 RES CF 1/4W 5% 10ohm LL R60 R95-96 R144-146
3 0024947001 RES CF 1/4W 5% 47ohm LL R73-74 R79
1 0024952001 RES CF 1/4W 5% 100ohm LL R68
4 0024961001 RES CF 1/4W 5% 470ohm LL R71-72 R82-83
1 0024963001 RES CF 1/4W 5% 680ohm LL R141
9 0024965001 RES CF 1/4W 5% 1k LL R46-48 R51 R59 R69 R81 R100-101
1 0024967001 RES CF 1/4W 5% 1.2k LL R113
4 0024971001 RES CF 1/4W 5% 2.2k LL R89-92
2 0024972001 RES CF 1/4W 5% 2.7k LL R99 R102
3 0024973001 RES CF 1/4W 5% 3.3k LL R1 R56-57
11 0024977001 RES CF 1/4W 5% 4.7k LL R10-12 R15 R22 R39 R65 R77 R80 R118 R122
1 0024978001 RES CF 1/4W 5% 5.6k LL R25
3 0024979001 RES CF 1/4W 5% 6.8k LL R37 R119 R121
1 0024980001 RES CF 1/4W 5% 8.2k LL R108
22 0024981001 RES CF 1/4W 5% 10k LL R3 R5 R33-35 R40-43 R54-55 R67 R76
+ R110-111 R124 R128-R130 R132 R136-137
4 0024986001 RES CF 1/4W 5% 18k LL R114-117
8 0024987001 RES CF 1/4W 5% 22k LL R17 R61-64 R75 R134 R139
4 0024988001 RES CF 1/4W 5% 27k LL R18 R20 R70 R84
3 0024989001 RES CF 1/4W 5% 33k LL R66 R109 R112
1 0024991001 RES CF 1/4W 5% 39k LL R19

BASSMAN 60
PRINTED CIRCUIT BOARD ASSEMBLY (cont)
QTY PART # DESCRIPTION REFERENCE DESIGNATION
8 0024993001 RES CF 1/4W 5% 47k LL R6-8 R21 R23 R38 R52 R78
2 0024994001 RES CF 1/4W 5% 56k LL R9 R125
2 0024995001 RES CF 1/4W 5% 68k LL R30-31
1 0024996001 RES CF 1/4W 5% 82k LL R16
10 0024997001 RES CF 1/4W 5% 100k LL R28-29 R44-45 R49-50 R53 R58 R133 R148
1 0024998001 RES CF 1/4W 5% 120k LL R120
1 0024999001 RES CF 1/4W 5% 150k LL R13
2 0025059001 RES CF 1/4W 5% 220k LL R138 R140
3 0025063001 RES CF 1/4W 5% 390k LL R2 R4 R26
1 0025069001 RES CF 1/4W 5% 1M LL R135
1 0025075001 RES CF 1/4W 5% 2.2M LL R126
1 0025084001 RES CF 1/4W 5% 10M LL R123
5 0051040001 RES FP 1/4 47OHM 5% R85-86 R97-98 R103
3 0026549001 RES CF 1/2W 5% 1.5k LL R88 R93 R127
1 0028861001 RES CF 1/2W 5% 3.3k LL R147
1 0027627001 RES FILM 1W 5% 10ohm LL R107
1 0029722001 RES FILM 1W 5% 1k LL R131
2 0037354001 RES FILM 1W 5% 4.7k LL R87 R94
1 0051417001 RES MOX 2W 5% 22ohm LL R106
2 0027478000 RES WW 5W 10% .22ohm R104-105
2 0041256000 RES WW 5W 10% 470ohm R142-143
4 0028091000 SWITCH PUSH SLFLK SHORT STROKE S1-4 (Active/Passive,Enhance,Mute,Limiter)
4 0048451000 BUTTON PUSH WHITE @ S1-4
1 0051418003 THERMAL SENSOR PTC 100 DEG C RT1
1 0040987000 CABLE RIBBON 10 CKT 3.75" PW16
1 0027419000 HDR .1 CTR 10 CKT SQ PIN P16
1 0055349000 HEATSINK PLATE, DELUXE 90 HS1
2 0040903000 INSULATOR MICA TO-218 @ Q18-19
2 0032908000 SCRW TF 6-32X3/8 PHP ZI @ HS1/PCB
4 0027638000 SCRW TF4-40X3/8 HWHS ZI @ Q16-19
2 0032937000 WSHR CONE @ Q18-19
REF 0025936000 STANDOFF NYL PCB SNAP 3/8" ST 1-4
1 0028760000 XSTR NPN 2SC4793/2SC3298B Q16
1 0028759000 XSTR PNP 2SA1306A TO-220P Q17
1 0054418000 XSTR NPN 2SC3263 MT-100 Q18
1 0054417000 XSTR PNP 2SA1294 MT-100 Q19
1 0014689003 XSTR N-CH JFET J111 TO-92 Q1
2 0016739003 XSTR NPN 2N4401 TO-92 Q14 Q22
4 0025751003 XSTR NPN 2SC2362K/2SC2389STPS Q2-3 Q6 Q9
1 0051448003 XSTR NPN 2SD1857 Q12
1 0014867003 XSTR NPN MPSW42 TO-92 Q11
5 0016742003 XSTR PNP 2N4403 TO-92 Q4-5 Q15 Q21 Q23
2 0025752003 XSTR PNP 2SA1038STPS Q7-8
1 0051447003 XSTR PNP 2SB1236 Q13
1 0014408003 XSTR PNP DARLNGTN MPSA63 TO-92 Q20
1 0014866003 XSTR PNP MPSW92 TO-226AE Q10

BASSMAN 60
CHASSIS ASSEMBLY
QTY PART # DESCRIPTION REFERENCE DESIGNATION
1 0020789000 FUSE QA 20mmx5mm 250v 1A 230V EUR
1 0020794000 FUSE QA 20mmx5mm 250v 2A 100V/120V
1 0054318000 HEATSINK BAR, PRNCTN 65/ DLX 90
1 0054642000 CONN IEC SNAPIN
10055643000 CHASSIS BASSMAN 60
10055644000 PANEL, FRONT, BASSMAN 60
10055645000 PANEL, REAR, BASSMAN 60
10055647000 PCB ASSEMBLY, BASSMAN 60
5 0055776000 KNOB, ROTARY, BASSMAN AMPS
5 0033206000 BUSHING KNOB SPACER
1 0038900000 SCRW TF 6-32X1/4 PHP ZI @Gnd Lug
1 0053479000 NUT HEX 7/16 20X1/8 NI @input jack
1 0053480000 WASHER FLAT .442 X.692 NI @input jack
3 0028500000 SCRW TF 8-32x3/4 HWH SLTD ZI @ Heatsink
1 0028560000 END BELL XFMR 85W @Xfmr
4 0028591000 NUT ACORN 8-32 @Xfmr
4 0028937000 SCRW TF 6-32x5/8 PHP ZI TAPTYT @Standoff
4 0030007000 WSHR LCK INTL 8x.330x.02 ZI @Xfmr
2 0051155000 SCRW SMB #4X3/8 PHP BLX @ XLR jack
6 0051404000 STANDOFF NYLON BLK .375
4 0025936000 STANDOFF NYL PCB SNAP 3/8"
4 0055838000 NUT, PLASTIC REAN
1 0025935000 SWITCH DPST .187 TAB (DOM) 100V/120V
1 0039287000 SWITCH DPST .187 TAB GLOBA 230V EUR
1 0027668000 XFMR PWR 120v 85W DOMESTIC
1 0039357000 XFMR PWR EXP DEL112/ROC PRO EXPORT
END ITEM ASSEMBLY
QTY PART # DESCRIPTION REFERENCE DESIGNATION
10055622000 CABINET ASSEMBLY BASSMAN 60
10055638000 CHASSIS ASSY BASSMAN 60 120V
10055639000 CHASSIS ASSY BASSMAN 60 230V
10055642000 CHASSIS ASSY BASSMAN 60 100V
1 0050850000 NAMEPLATE VINTAGE PLASTIC SMALL
1 0047248000 CORD PWR W/IEC CONN DOM 120V
1 0053997000 CORD PWR W/IEC CONN 100V 100V
1 0047249000 CORD PWR W/IEC CONN 230V UK 230V UK
1 0047250000 CORD PWR W/IEC CONN 240V 240V
1 0047251000 CORD PWR W/IEC CONN 230V 230V EURO
1 0053641000 HORN PIEZO LTB 12 SPKR
1 0055831000 GASKET, HORN, BASSMAN SERIES
1 0047539000 SPEAKER 12” 8ΩBXR60
2 0016352000 NUT HEX 3/8-32x3/32 TK NI @logo
4 0024052000 SCRW SMA 6-x5/8 PHP BLX @horn
4 0026577000 SCRW M 10-32x1 PHP BLX @speakers
10 0036112000 SCRW SMAB 6x1-1/4 OHP BLX w/WS @grille

BASSMAN 60
END ITEM ASSEMBLY (cont)
QTY PART # DESCRIPTION REFERENCE DESIGNATION
6 0036199000 SCRW M 8-32x1-3/16 OHP BLX @chassis
2 0050312000 SCRW 2-56X3/8 FHP NI @logo
6 0029527000 WSHR FNSH 8-5/8 FLNGD BLX WX @chassis
1 0055672000 GRILLE, METAL, BASSMAN 60
1 0055731000 LOGO, DOME, BASSMAN AMPS