Fender BASSBREAKER 18/30 User manual

Bassbreaker™ 18/30
(This is the model name for warranty claims)
Fender Musical Instruments Corp. / 17600 North Perimeter Drive, Suite 100 / Scottsdale, AZ 85255-5440
Issued April, 2016
P/N 2264000000 (COMBO 120V)
SERVICE MANUAL
ATTENTION:
WARRANTY SERVICE PROCEDURES
The Bassbreaker 18/30 Combo Amplifier is considered to be field serviceable to the compo-
nent level. As such stuffed PCBAssemblies are not readily available for this unit. Any Fender
Authorized Service Center in need of a warranty replacement PCB Assembly for this unit
should contact FMIC Tech Support and you will be instructed on how to proceed.

2
Bassbreaker™ 18/30
(This is the model name for warranty claims)
IMPORTANT NOTICE
Copyright © 2016 FMIC. All rights reserved. All
information contained herein is CONFIDENTIAL
and PROPRIETARY and is the property of Fender
Musical Instruments Corporation. It is not to be
sold or assigned to another party and is disclosed
solely for use by Fender® Authorized Service
Centers for purposes of product service and main-
tenance. All information is not to be disclosed to
others without the expressed permission of Fend-
er Musical Instruments Corporation. All
specifications are subject to change without no-
tice. This information and any copies produced
electronically or otherwise must be surrendered
upon demand of Fender Musical Instruments Cor-
poration.
Parts marked with two asterisks (⚠) indicate the
required use of that specific part. This is neces-
sary for RELIABILITY and SAFETY requirements.
DO NOT USE A SUBSTITUTE!
PARTS LIST CODES
The description codes used in the itemized Parts Lists are defined below:
CAPACITOR CODES
CAPAE = Aluminum Electrolytic
CAP CA = Ceramic Axial
CAP CD = Ceramic Disk
CAP CR = Ceramic Radial
CAP MPF = Metalized Polyester Film
CAP MY = Mylar
CAP PFF = Polyester Film/Foil
RESISTOR CODES
RES CC = Carbon Comp
RES CF = Carbon Film
RES FP = Flame Proof
RES MF = Metal Film
RES MOX = Metal Oxide
RES WW = Wire Wound
HARDWARE CODES
BLX = Black Oxide
CR = Chrome Plated
HWH = Hex Washer Head
M = Machine Screw
NI = Nickel Plated
OHP = Oval Head Phillips
PB = Particle Board
PHP = Pan Head Phillips
PHPS = Pan Head Phillips Sems
SMA = Sheet Metal "A" Point
SMB = Sheet Metal "B" Point
SS = Stainless Steel
TF = Thread Forming
ZI = Zinc Plated

3
Bassbreaker™ 18/30
(This is the model name for warranty claims)
SPECIFICATIONS
Model Name: BASSBREAKER 18/30 (Combo)
Release Number: PR 3036
Part Numbers, Combo: (120V, 60Hz) US: 2264000000
(110V, 60Hz) TW: 2264001000
(240V, 50Hz) AU: 2264003000
(230V, 50Hz) UK: 2264004000
(230V, 50Hz) ARG: 2264005000
(230V, 50Hz) EU: 2264006000
(100V, 50/60Hz) JP: 2264007000
(220V, 60Hz) ROK: 2264009000
(240V, 50Hz) MA: 2264013000
Power Requirement: 175W
Power Output: 30W RMS minimum into 4, 8, or 16 ohms @ 5% THD
18W RMS minimum into 4, 8, or 16 ohms @ 5% THD
Impedance All Inputs: 1 Meg ohm
Dimensions Combo Height: 21.875 in (55.6 cm)
Combo Width: 26.25 in (66.7 cm)
Combo Depth: 10.00 in (25.4 cm)
Weight Combo: 50 lbs. (22.7 kg)
Product specifications are subject to change without notice

4
Bassbreaker™ 18/30
(This is the model name for warranty claims)
SERVICE NOTES
Disassembly, Bassbreaker 18/30 Combo
1. Remove the cabinet upper back panel. NOTE:
Be careful to not damage the foam tape on the
cabinet cleats.
2. Remove the cabinet lower back panel.
3. Disconnect the speaker wire from speakers.
4. Remove the side chassis-mounting screws.
5. While supporting the chassis, remove the top
chassis-mounting screws.
6. Remove the chassis from the cabinet and set
the chassis, transformers down, on a work sur-
face.
7. Cut the tie-wrap that secures the speaker wires
to the chassis. (This facilitates opening the
chassis back panel.)
8. Remove the 4 each pan head back panel
screws at the top of the back panel and the 4
each undercut flat head screws at the bottom of
the back panel.
9. Hinge the back panel open at the bottom of the
chassis while feeding the speaker wires and
output transformer wires into the chassis.
10. Unplug the 3 conductor ribbon cable from
footswitch jack PCB at the rear chassis panel to
enable the rear chassis panel to be fully
opened.
Reassembly, Bassbreaker 18/30 Combo:
1. Reconnect the 3 conductor ribbon cable to the
3 conductor header at the rear panel footswitch
jack PCB.
2. Hinge the back panel closed while pulling the
slack of the speaker wires at the outside of the
chassis.
3. Install the 4 each pan head back panel screws
at the top of the back panel and the 4 each un-
dercut flat head screws at the bottom of the
back panel.
4. Install a tie-wrap to re-secure the speaker wires
to the lance at the outside of the chassis.
5. Reverse combo disassembly operations 5
through 1.
PCB EXCHANGE POLICY
Parts marked with a single asterisk (*) in the Part
Lists are not field replaceable. If a failure due to
one of these components is detected, please
contact the FMIC Customer Service Department to
order the complete PCB Assembly.
CIRCUIT DESCRIPTION
This section provides concise information about
new or unusual circuit designs incorporated into this
amplifier model. The purpose is to aid the service
technician by providing insight into the design areas
most likely to become obstacles in troubleshooting.
Information is focused for its effective use while
maintaining the security of Fender® proprietary
information wherever possible.
PRE-AMPLIFIER
The guitar INPUT is routed to one of 2 possible tone
stacks. Based on channel selection, the signal level
from the INPUT is controlled by the 30W VOLUME
control or by the 18W VOLUME control.
V1A is the front end amplifier for both the 30W and
the 18W channels. V1B functions as a cathode
follower to buffer the load of both of the tone stacks.

5
Bassbreaker™ 18/30
(This is the model name for warranty claims)
A footswitch or the top panel channel select switch
is used to accuate relay K1 to select the output of
the appropriate tone stack for the 30W channel
VOLUME, BASS, MIDDLE, and TREBLE) or the
18W channel (VOLUME, TONE). The footswitch or
top panel or top panel channel select switch also
selects the variable headroom of the power
amplifier.
V2 is a combination voltage amplifier (V2A) and
split load phase inverter (V2B) that feeds the power
amp EL84 output tubes.
POWER AMPLIFIER
The output of the selected tone control feeds V2A
which is a tone stack recovery stage while V2B
functions as a “split load” phase inverter. The plate
and cathode of phase inverter V2B feed the grids of
output tubes V3 –V6 which are arranged as a
push-pull quad. The plates of V3 –V6 feed the
primary of output transformer T1.
The secondary of T1 provides 16, 8, or 4 ohms
output by way of IMPEDANCE SELECT switch
S201 on the back panel. The IMPEDANCE
SELECT switch feeds J5 MAIN SPEAKER jack.
The tip shunt of J5 goes to the internal 16 ohm
speaker load in the cabinet (two 12”, 8 ohm
speakers wired in series). The EXTENSION
SPEAKER jack J4 is wired in parallel with MAIN
SPEAKER jack.
The internal speakers are driven via the tip shunt of
the MAIN SPEAKER jack J5. (The IMPEDANCE
SELECT switch should always be set to 16 ohms
when the internal speakers are used exclusively.)
Plugging a speaker into the MAIN SPEAKER jack
disconnects the internal speakers so that only the
speaker plugged into the MAIN SPEAKER jack is
driven. If a speaker is plugged into the EXTENSION
SPEAKER jack J4 instead of the MAIN SPEAKER
jack, the external speaker will be put in parallel with
the internal speakers. Plugging a speaker into the
MAIN SPEAKER and EXTERNAL SPEAKER jacks
will disconnect the internal speakers, and put the
speakers plugged into the MAIN SPEAKER and
EXTENSION SPEAKER jacks in parallel.
Resistor R37 10 Kohm 1/2W is connected between
the 16 ohm output of T1 and the tip of J3 (POST
POWER AMP LINE OUT). Components R38 (82
Ohms) and C16 (220pF) are connected from the tip
of J3 to ground. The following components R61,
R39, and C17 are connected from the shunt of J3 to
ground to provide a low level replica of the signal at
the output of the power transformer.
POWER SUPPLY
The power supply circuitry is located on the large
PCA that is between the control PCA and tube PCA.
Certain aspects of the power supply are not typical
of power supplies found in other Fender tube
amplifiers. It has a regulated selectable voltage
screen supply for the output tubes, and a selectable
cathode bias resistor network that tracks the screen
supply. The screen supply voltage is controlled by a
footswitch or by the top panel channel select push
button control to select an amplifier output power of
18 watts or 30 watts. The cathode bias resistor
value tracks the screen supply to properly self-bias
the output tubes and maintain proper idle current.
The high voltage red-red secondary winding of T2 is
rectified by a full wave bridge and is filtered by C25
to provide the high voltage DC plate supply for V3,
V4, V5, and V6 (B+). It is further R-C filtered to
provide plate supplies for V2B (Y), V2A, and V1 (X).
The B+ supply is also used to feed the input to the
screen supply for V3, V4, V5 and V6.
The brown-brown/brown-yellow secondary winding
of T2 is rectified by a full wave bridge and filtered by
C30 to provide + 24 VDC. This feeds regulator U7
to provide a regulated +15VDC supply to power
the control circuit to select screen voltage
the control circuit to select cathode resistor
network values.
the 12V tone stack selection relay (K1)
DC filament voltage for tubes V1 and V2.
The green-green secondary winding of T2 provides
AC power for the filaments of V3, V4, V5, and V6.
As stated earlier, the B+ supply from the red-red
winding also feeds the input to the selectable-
voltage screen (Z) supply. The screen supply

6
Bassbreaker™ 18/30
(This is the model name for warranty claims)
voltage value is selected by CHANNEL_SELECTM
when the top panel CHANNEL TWO push button
switch or the 1 button footswitch is actuated. The
voltage divider at the base of transistor Q6 provides
voltages levels for the following modes of operation
For 30W operation, a nominal value of 0
VDC is provide at the base of transistor Q2
to select a nominal screen voltage value of
300 VDC.
For 18W opertion, a nominal value of +6.4
VDC is provide at the base of transistor Q2
to select a nominal screen voltage value of
200 VDC.
The screen voltage (Z) is provided at the source of
transistor Q3 and connected to screen resistors
R29–R32.
.

7
Bassbreaker™ 18/30
(This is the model name for warranty claims)
* Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY section above.
shaded Unique Fender® part. Order directly from the FMIC Parts Department.
shaded +*Access to this part or assembly is controlled. Please contact the FMIC Customer Service Department.
⚠Safety Critical Part. Replacement must match Safety Agency –Value, if specified –Type, if specified –Approval Mark(s), if on part.
shaded + ⚠Both a unique Fender® part and a Safety Critical Part as defined above
PARTS LIST: PCB ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
1
7706437000
*PCB ASSEMBLY BASSBREAKER 18/30
STUFFED PCB ASSEMBLY
2
0051720000
⚠CAP AE AX 22µF 450V 20%
C27-28
1
0024820000
⚠CAP AE AX 47uF 350V 20%
C15
2
0051719000
⚠CAP AE AX 47uF 450V 20%
C25-26
1
0028463003
CAPAE RDL 10uF 50V 20%
C31
1
0041048000
CAPAE RDL 2200uF 50V 20%
C30
2
0028459003
CAPAE RDL 2.2uF 50V 20%
C1, C9
2
0028467003
CAPAE RDL 22uF 50V 20%
C12, C39
1
0038703001
CAP CA .1uF 50V
C19
2
0051185003
CAP CD .01uF 1000V 20%
C7, C10
6
0051406003
CAP CD 220pF 500V 10%
C16-18, C32, C36-37
1
0020917000
CAP CD 250pF 1000V 10%
C3
2
0020842000
CAP CD 500pF 1000V 10%
C8, C33
1
0051409003
CAP CD 68pF 500V 5%
C6
4
0025995002
CAP CD 8200pF 1000V 20%
C21-24
2
0027264003
CAP MPF .01uF 100V 10%
C35, C47
1
0027272003
CAP MPF .047uF 63V 10%
C38
1
0027279003
CAP MPF .1uF 100V 10%
C29
1
0053860000
⚠CAP MPF .1uF 250VAC 20%
C41
1
0024833000
CAP MPF RDL .022uF 400V 10%
C11
3
0024845000
CAP MPF RDL .047uF 400V 10%
C5, C13-14
1
0024846000
CAP MPF RDL .047uF 630V 10%
C20
1
0024853000
CAP MPF RDL .1uF 250V 10%
C40
2
0024854000
CAP MPF RDL .1uF 400V 10%
C2, C4
1
0024855000
CAP MPF RDL .1uF 630V 10%
C34
1
0096463000
CTRL SNAPIN 25k B TAPER 180ｰ-D SHAFT
R9
2
0096457000
CTRL SNAPIN 1M 30ATAPER 180ｰ-D SHAFT
R10, R12
1
0096460000
CTRL SNAPIN 250K 30ATAPER 180ｰ-D SHAFT
R7
2
0096459000
CTRL SNAPIN 250K 15ATAPER 180ｰ-D SHAFT
R8, R13
4
0064089001
DIODE 1N4003
D5-8
5
0026730001
DIODE 1N4006 800V 1A
D1-4, D21
2
0006260001
DIODE 1N4448 SIGNAL
D9, D15
2
0029690001
DIODE HV 3kV 200mA
D13-14
1
0026000001
⚠FSTN TAB MALE .187x.032 PCB MT
P13
17
0025802000
⚠FSTN TAB MALE .250x.032 PCB MT
P1-4, P11-12, P14-18, P20, P25-27, P31
4
0031041000
⚠FSTN TAB ML RTANG PCB .25x.032
P5-8
1
0068329000
⚠FUSE TD PIGTAIL 8AL 250VAC
F2
1
0066292001
⚠FUSE QA 4A 125V
F3
4
0027410000
HDR .1 CTR 3 CKT SQ PIN
P2A, P2B, P3A, P3B
1
0027416000
HDR .1 CTR 8 CKT SQ PIN
P1B
1
0065442000
HDR .1 CTR 8 CKT RTANG LOCKING
P1A
1
0013562000
IC REGULATOR +15V MC7815CT
U7
1
0051658000
JACK MONO R/A
J2

8
Bassbreaker™ 18/30
(This is the model name for warranty claims)
* Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY section above.
shaded Unique Fender® part. Order directly from the FMIC Parts Department.
shaded +*Access to this part or assembly is controlled. Please contact the FMIC Customer Service Department.
⚠Safety Critical Part. Replacement must match Safety Agency –Value, if specified –Type, if specified –Approval Mark(s), if on part.
shaded + ⚠Both a unique Fender® part and a Safety Critical Part as defined above
PARTS LIST: PCB ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
4
0063213000
JACK PCB STEREO CLOSED CKT
J1, J3-5
1
7706449000
LED TULIP PANEL MOUNT ASSEMBLY WHITE
D10
13
0097360000
NUT HEX 4-40 EX LOCK
@ PCB STANDOFFS
1
7706448000
RELAY DPDT DIP 12VOLT 16.6mA
K1
2
0025116001
RES CF 1/2W 5% 100k LL
R5, R16
2
0028580001
RES MOX FP 1/2W 5% 100ohm LL
R50-51
1
0025113001
RES CF 1/2W 5% 10k LL
R37
1
0025117001
RES CF 1/2W 5% 220k LL
R3
2
0047434001
RES CF 1/2W 5% 56k LL
R21-22
2
0024969001
RES CF 1/4W 5% 1.5k LL
R4, R17
2
0024997001
RES CF 1/4W 5% 100k LL
R6, R65
2
0024981001
RES CF 1/4W 5% 10k LL
R15, R61
1
0024955001
RES CF 1/4W 5% 180ohm LL
R56
4
0025069001
RES CF 1/4W 5% 1M LL
R1, R14, R18-19
2
0024965001
RES CF 1/4W 5% 1k LL
R20, R46
1
0024956001
RES CF 1/4W 5% 220ohm LL
R53
3
0024987001
RES CF 1/4W 5% 22k LL
R45, R57, R62
1
0024975001
RES CF 1/4W 5% 3.9k LL
R64
1
0028865001
RES CF 1/4W 5% 30k LL
R43
1
0024989001
RES CF 1/4W 5% 33k LL
R2
1
0024961001
RES CF 1/4W 5% 470ohm LL
R36
2
0024977001
RES CF 1/4W 5% 4.7k LL
R40-41
2
0025065001
RES CF 1/4W 5% 470k LL
R23-24
5
0024993001
RES CF 1/4W 5% 47k LL
R25-28, R55
2
0025081001
RES CF 1/4W 5% 5.6M LL
R42, R63
1
0024995001
RES CF 1/4W 5% 68k LL
R11
2
0024951001
RES CF 1/4W 5% 82ohm LL
R38-39
2
0041706001
RES FILM 1W 470k 5%
R44, R75
2
0027347001
RES FILM 1W 5% 2.2k LL
R52, R54
4
0027355001
RES MOX 2W 5% 220ohm LL
R29-32
3
0051417001
RES MOX 2W 5% 22ohm LL
R58-60
1
0036470001
⚠RES MOX FP 1W 5% 10k LL
R49
2
0027358001
⚠RES MOX FP 2W 5% 3.9k LL
R47-48
2
0029670000
RES WW BT 5W 10% 150ohm
R33-34
1
0028898000
RES WW BT 5W 5% 240ohm
R35
1
7706446000
PUSH BUTTON LED WHT W/ILLUM BTN
S1
13
0038519000
STANDOFF M/F 4-40 x 1/4L
@ PCB
12
0025936000
STANDOFF NYL PCB SNAP 3/8
@ PCB
2
0068714000
⚠SUPPORT TO-220 STANCHION PAD
@ Q1-2
1
7706795000
SWITCH SLIDE DPTT PC MOUNT BTN SLOT
S201
1
0028503002
⚠THERMISTOR 10 ohm 5A C60-11
RT1
6
0029167000
⚠TUBE SOCKET 9 PIN PCB MOUNT
V1-V6
2
0017746000
WSHR SHLDR NYL 1/8 x 1/4
@ Q3 and U7
1
0096493000
⚠XSTR MOSFET N-CH 600V FDP7N60NZ
Q3

9
Bassbreaker™ 18/30
(This is the model name for warranty claims)
* Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY section above.
shaded Unique Fender® part. Order directly from the FMIC Parts Department.
shaded +*Access to this part or assembly is controlled. Please contact the FMIC Customer Service Department.
⚠Safety Critical Part. Replacement must match Safety Agency –Value, if specified –Type, if specified –Approval Mark(s), if on part.
shaded + ⚠Both a unique Fender® part and a Safety Critical Part as defined above
PARTS LIST: PCB ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
2
0016739003
XSTR NPN 2N4401 TO-92
Q6, Q8
2
0096492000
⚠XSTR NPN BUJ103A 700V 4A TO-220
Q1-2
1
0016742003
XSTR PNP 2N4403 TO-92
Q7
PARTS LIST: CHASSIS ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
1
0012560000
BUSHING SNAP 5/8x27/32 BLK
1
0018022000
BUSHING SNAP 5/16x17/32 BLK
@SPEAKER WIRE
3
0031263000
BUSHING SNAP SHORT 3/4 x15/16 BLK
2
0078274000
CABLE ASSY RIBBON 3 CKT 3"
1
7707677000
CABLE ASSY RIBBON 8 CKT 4"
2
0064512000
COLLAR TUBE SHIELD 9PIN
1
0032219000
⚠COLLAR, PILOT LIGHT
1
0054642000
⚠CONNECTOR IEC SNAP IN
1
0077982000
⚠FUSE QA 1-1/4x1/4 250v 3A sell 049
0
0020793000
⚠FUSE QA 20mmx5mm 250V 1.6A
0
0020796000
⚠FUSE QA 20mmx5mm 250v 3.15A
1
0036702000
⚠FUSE HOLDER 3AG FINGER GRIP
0
0036703000
⚠FUSE HOLDER 5MM FINGER GRIP
4
0079630000
⚠GROMMET RUBBER .38 ID x .500 MTG
1
0079477000
⚠HEAT SINK BAR EVH 5150 III 50W
1
0091860000
⚠JEWEL PILOT LIGHT CLEAR
6
7706965000
KNOB BASSBREAKER FLAT 180 DEG
3
0069393000
NUT 6-32 HEX EX LOCK
1
0031625000
NUT HOLDER PILOT LIGHT 11/16-27
8
0022004000
NUT KEPS #8-32 ZINC
1
7706443000
PANEL REAR BASSBREAKER 18/30
0
7706444000
PANEL REAR BASSBREAKER 18/30 EXP
1
7706437000
*PCB ASSY BASSBREAKER 18/30
4
7706159000
RETAINER TUBE EL84 BASSBREAKER
2
0021568000
SCRW M 6-32x3/16 PHP NI
@IMPEDANCE SWITCH
3
0076154000
SCREW M 6-32 X 5/16 FHP STL ZI
13
0031188000
SCRW M 4-40x1/4 PHP ZI ITLW
4
0014999000
SCRW M 6-32x1/4 PHP BLX
4
0014206000
SCRW M 6-32x1/4 UFHP BLX
18
0031184000
SCRW M 6-32x1/4 PHP BLX ITLW
4
0029913000
SCRW TF 6-32 X 3/16 PHP ZI
@ TUBE COLLAR
8
7707655000
SCRW M 8-32x3/8 PHP ZI SEMS
@ XFORMER
12
0028937000
SCRW TF 6-32x5/8 PHP ZI
3
0028500000
SCRW TF 8-32 x 3/4 HWH SLTD ZI
@ HEAT SINK
8
0039371000
SPRING RETAINER TUBE 1.81Lx.15
1
0036570000
⚠SWITCH TOGGLE DPST W/NUTS

10
Bassbreaker™ 18/30
(This is the model name for warranty claims)
* Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY section above.
shaded Unique Fender® part. Order directly from the FMIC Parts Department.
shaded +*Access to this part or assembly is controlled. Please contact the FMIC Customer Service Department.
⚠Safety Critical Part. Replacement must match Safety Agency –Value, if specified –Type, if specified –Approval Mark(s), if on part.
shaded + ⚠Both a unique Fender® part and a Safety Critical Part as defined above
PARTS LIST: CHASSIS ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
1
0037039000
⚠SWITCH TOGGLE SPST W/NUTS
1
5550112391
TUBE GT-ECC83-S SELECT
V1
1
5550112406
TUBE ST-12AX7-R SILVER
V2
4
0097124000
TUBE EL84-S SLOVAKIA
2
0023598000
TUBE SHIELD (099-0723-000)
4
0031153000
WSHR FLAT 3/8x.614 NI (sell 049)
3
9904300100
WASHER LCK INTL 3/8x.681x.032
2
0022293000
WSHR FLAT .473x.750 NI
@ SWITCHES
1
7706441000
⚠XFMR OUTPUT BASSBREAKER 18/30
1
7706440000
⚠XFMR PWR BASSBREAKER 18/30 100V
1
7706438000
⚠XFMR PWR BASSBREAKER 18/30 120V
1
7706439000
⚠XFMR PWR BASSBREAKER 18/30 230V
PARTS LIST: CABINET ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
1
7706432000
*CABINET BASSBREAKER 18/30 COMBO
COMPLETE CABINETASSEMBLY
2
7706172000
COVERING TWEED BLACK
SOLD BY THE SQUARE YARD
1
0026317000
⚠CLOTH GRILLE BLACK PVC
SOLD BY THE SQUARE YARD
2
7706800000
⚠VENT TOP PERF BB18-30
12
0067014000
SCRW SMA 6X5/8 THP BLX
1
7706170000
⚠HANDLE BASSBREAKER SERIES
4
0064162000
NUT T 8-32x1/2 STR 3 PRNG BLX
8
0064162000
NUT T 8-32x3/4 STR 3 PRNG BLX
4
0037247000
SCRW M 8-32x1 OHP NI
4
0048976000
FOOT RUBBER 1-1/2" BXR 115
4
0033380000
SCRW SMAB 8x1 THP BLX
18
0059921000
SCRW SMA 10X1 1/4 THP BLK
1
7706256000
*NAMEPLATE BASSBREAKER 18/30 / 45
PARTS LIST: ENDITEM ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
1
7707569000
COVER AMP BASSBREAKER 18_30
1
1
7706424000
FOOTSWITCH ASSY 1 BTN BLK LOGO
1
7706799000
⚠PANEL REAR PERF BB 18-30 45
2
7700343000
SPEAKER 12" 8OHM 70W T5901AX60
6
0036619000
SCRW M 10-32x1-1/2 THP NI
8
0047821000
SCRW M 10-32 x 3/4 THP BLK
2
0037210000
SCRW SMA 2x3/8 OHP NI
6
0067014000
SCRW SMA 6x5/8 THP BLX
8
0016188000
SCRW WOOD 6x1 OHP NI
8
0037215000
WSHR C/SUNK NICKEL #6

11
Bassbreaker™ 18/30
(This is the model name for warranty claims)
* Non-serviceable part. Replace complete parent assembly. See PCB EXCHANGE POLICY section above.
shaded Unique Fender® part. Order directly from the FMIC Parts Department.
shaded +*Access to this part or assembly is controlled. Please contact the FMIC Customer Service Department.
⚠Safety Critical Part. Replacement must match Safety Agency –Value, if specified –Type, if specified –Approval Mark(s), if on part.
shaded + ⚠Both a unique Fender® part and a Safety Critical Part as defined above
PARTS LIST: ENDITEM ASSEMBLY
QTY.
PART #
DESCRIPTION
REFERENCE DESIGNATION
4
0029821000
⚠EYELET RFLNGD .215 OD x.315 L
1
7706157000
*LOGO FENDER BASSBREAKER SERIES
1
0057674000
⚠CORD PWR W/IEC 230V ARG
1
0053997000
⚠CORD PWR W/IEC CONN 100V JPN
1
0047251000
⚠CORD PWR W/IEC CONN 230V
1
0047249000
⚠CORD PWR W/IEC CONN 230V UK
1
0047250000
⚠CORD PWR W/IEC CONN 240V
1
0047248000
⚠CORD PWR W/IEC CONN DOM

12
Bassbreaker™ 18/30
(This is the model name for warranty claims)
Service Diagram List
Service Diagram (Schematic)……………………...……………….…….Bassbreaker 18/30 Main PCB Rev. A
Service Diagram (PCB Assembly)…………………………………….….Bassbreaker 18/30 Main PCB Rev. A

5. THIS SCHEMATIC IS FOR PCB FABRICATION P/N 7706447000
SHEET: 1 OF 2DATABASE FILE: Z3036S.SCH
6-J L-15
A
RELEASE DATE: 7-J L-15
A
BASSBREAKER 18/30
7706436000
M.Gallagher
ENGR: GALLAGHERDRAWN: GALLAGHER
PR3036
4. ALL DIODES ARE 1N4448.
3. ALL POLARIZED CAPACITORS IN uF, 20%; 50V MINIM M.
2. ALL NPOLARIZED CAPACITORS IN uF, 10% OR BETTER; 50V MINIM M.
(POWER S PPLY BYPASS CAPACITORS ARE 20%).
1. ALL RESISTORS IN OHMS, 5%; 1/4W.
( NLESS OTHERWISE NOTED) NOTES:
SERVICE DIAGRAM, COMBINED
TITLE:
DATE:
APPROVED BY:
DATE:
CHECKED BY:
A PROPRIETARY NAT RE TO FENDER M SICAL
THIS DOC MENT CONTAINS INFORMATION OF
ATION FROM FENDER M SICAL INSTR MENTS.
TRANSMITTED TO OTHERS WITHO T A THORIZ-
CONFIDENCE AND SHALL NOT BE DISCLOSED OR
INSTR MENTS AND IS S BMITTED TO YO IN
R
SIZE DRAWING N MBER REV.
<assembly name>
5678 4 3 2 1
12345678
A
B
C
D D
C
B
A
R E V I S I O N S
DESCRIPTION DATE APPROVEDREV.
D
(schematic)
M SICAL INSTR MENTS
Corona, CA .S.A.
POWER
SWITCH
STANDBY
SWITCH
P/N 0037039000
S2
SCHEMATIC: SINGLE REMOTE FOOTSWITCH
CHANNEL SELECT
P/N 7706424000
8
9
L
N
10
10
10
10
10
10
10
10
10
GRN
GRN/YEL
T1
BLK
BRN
BL
RED
YEL
P/N 7706441000
O TP T XFMR
T2
VIO
WHT/BLK
GRN
GRN
RED
RED
BRN
BRN/YEL
BRN
BLK
P4
230-240V WIRING
P/N 7706439000
240V230V
WIRING DIAGRAM
P17
P17P25
P25
VIO
WHT
P17
GRN
GRN
RED
RED
P4
T2
BRN
BRN/YEL
BRN
P/N 7706440000
100V WIRING
BLK
WHT
BRN
BRN/YEL
BRN
T2
RED
RED
GRN
GRN
120V WIRING
P/N 7706438000
1N4006
(X4)
VIOLET
F1 F SE VAL E
110-120V
220V-240V
F3A 250V
F1.6A 250V
S1A S2A
S1B S2B
GRY GRY
+6.40 VDC
TP14
+15.7 VDC S1 IN - CHANNEL 2 SELECT ON
TP28
0 VDC S1 O T - CHANNEL 2 SELECT OFF
O T O T
(OFF) (OFF)
1N4003
(X4)
VAC M T BE PCB
CONTROL PCB
SPEAKER_LINE O T PCB
VAC M T BE PCB
POWER S PPLY PCB
LOAD IMPEDANCE SWITCH
16-ohms
8-ohms
4-ohms
+
-
+
-
WHITE/BLACK
TWISTED PAIR
CONTROL PCB
TIP RING
F1
NC
NC
WHITE
WHITE
POWER S PPLY PCB
100V F3.15A 250V
+228VDC
+60VDC
TP18
TP17
RESISTIVE LOAD PL GGED INTO THE MAIN SPKR JACK.
APPROX. 30 WATTS RMS MINIM M AT 5% THD INTO 16 ohm
VOL CONTROL AT F LL CW.
AND TONE CONTROLS AT F LL CW.
INP T APPROX. 10.0mV 1kHz INTO THE INP T JACK J1
NIT AT RATED LINE VOLTAGE.
30W O TP T TEST:
RESISTIVE LOAD PL GGED INTO THE MAIN SPKR JACK.
APPROX. 18 WATTS RMS MINIM M AT 5% THD INTO 16 ohm
VOL CONTROL AT F LL CW.
AND TONE CONTROL AT F LL CW.
INP T APPROX. 2.8mV 1kHz INTO THE INP T JACK J1
NIT AT RATED LINE VOLTAGE.
18W O TP T TEST:
+7.00VDC
TP12
+205 VDC
TP2
30W OPERATION
W1 INSTALLED IN HEAD NITS ONLY.
PCB WIRE SET ITEM (J) AND SPEAKERS INSTALLED IN COMBO ONLY.
9
8
TEST CONDITIONS: NIT OPERATING AT RATED LINE VOLTAGE.
DC VOLTATES MAY VARY +/-10%. AC VOLTAGES MAY VARY +/-20%.
OF 1M ohms AC INP T IMPEDANCE AND OF 10M ohms DC INP T IMPEDANCE.
7. ALL VOLTAGES MEAS RED WITH RESPECT TO GRO ND SING A TR E RMS DVM
16 ohm RESISTIVE LOAD CONNECTED TO MAIN SPEAKER JACK.
IMPEDANCE SWITCH SET TO 16 ohms.
ALL DC AND S PPLY MEAS REMENTS MADE WITH NO INP T SIGNAL.
O TP T CONTROL AT F LL CW POSITION.
ALL OTHER CONTROLS AT 50% ROTATION.
6. TEN-DIGIT N MBERS ARE FENDER PART N MBERS.
ALL SIGNAL MEAS REMENTS MADE WITH 10mV 1kHz SINE INP T AT J1.
BLACK
WHITE
GRN/YEL
P/N 0036570000
AND PCB ASSY P/N 7706437000 AND PCB ASSY 7709408000.
SPEAKER
SPEAKER
BLK
TO P9 ON CONTROL PCB
TO WJ6 ON POWER PCB
TO P2 ON VAC M T BE PCB
TP 16-17 AND TP 22-27 INCL DE CHANNEL 1 AND CHANNEL 2 AC VOLTAGES.
TO P27 TO P18 TO P31 TO P20
18W OPERATION
30W OPERATION
18W OPERATION
30W OPERATION
18W OPERATION
BL YEL ORN BRN
1
2
3
V1-A
12AX7A
6
7
8
V1-B
12AX7A
R1
1M
J1
1
INP T
R4
1.5k
R3
220k
1/2W
R6
100k
CW
R8
250k15A
BASS
CW
R10
1M30A
VOL ME
R16
100k
1/2W
C1
2.2
C3
250pF
1kV
C4
.1
400V
C5
.047
400V
C6
68pF
500V
R17
1.5k
C9
2.2
CW
R7
250k30A
TREBLE
R11
68k
C2
.1
400V
CW
R13
250k15A
VOL ME
CW
R12
1M30A
TONE
C8
500pF
C7
.01
1kV
CW
R9
25kB
MIDDLE
7
9
2
3
V5-A
6BQ5/EL84
4
5
V5-B
6BQ5/EL84
7
9
2
3
V6-A
6BQ5/EL84
4
5
V6-B
6BQ5/EL84
7
9
2
3
V3-A
6BQ5/EL84
7
9
2
3
V4-A
6BQ5/EL84
4
5
V4-B
6BQ5/EL84
4
5
9
V1-C
R51
Fp100
1/2W
R50
Fp100
1/2W
WJ2-B
BLK
P11
P12
P13
P14
P15
P16
D1
D2
D3
D4 C26
47
450V
C27
22
450V
C28
22
450V
C25
47
450V
R47
Fr3.9k
2W
R48
Fr3.9k
2W
R49
Fp10k
1W
WJ1_B
RED
P4
WJ7-A
BLK
R29
Fr220
2W
R30
Fr220
2W
D13
R3000
D14
R3000
P1
P2
P3
R31
Fr220
2W
R32
Fr220
2W
R23
470k
R24
470k
R28
47k
R25
47k
C13
.047
400V
C14
.047
400V
4
5
9
V2-C
R21
56k
1/2W
R22
56k
1/2W
R20
1k
R19
1M
R18
1M
C10
.01
1kV
C11
.022
400V
4
5
V3-B
6BQ5/EL84
R26
47k
R27
47k
R33
150
10%-5W
C15
47
350V
R14
1M
NC
NO
4
6
8
K1-A
NO
NC
13
11
9
K1-B
1
16
K1-C
C19
.1
D15
1N4448
J2
FOOTSWITCH
C12
22
C23
8200pF
1kV
C24C22
C21
WJ8-A WJ8-B
R5
100k
1/2W
1
2
3
V2-A
12AX7A
6
7
8
V2-B
12AX7A
R34
150
10%-5W
R35
240
5W
E
B
C
Q1
Q-B J103A
B J103A
E
B
C
Q2
Q-B J103A
B J103A
R44
470k
1W
C34
.1
630V
1
2
R45
22k
R37
10k
1/2W R38
82
J3
POST POWER AMP LINE O T
R39
82
C16
220pF
C17
220pF
C35
.01
C36
220pF
C37
220pF
1
2
R46
1k
C33
500pF
1
2
R43
30k
R55
47k
Q7
2N4403
R54
2.2k
1W
R53
220
R57
22k
C38
.047
D5
D6
D7
D8
Q8
2N4401
R40
4.7k
1 2
R36
470
R41
4.7k
F3
4A
C29
.1
O TIN
GND
1
2
3
7
7815
C30
2200
D9
1N4448
C31
10
R15
10k
P1A P1B
R2
33k
Q6
2N4401
S201-A S201-B
WJ14-A
WHT
WJ15-A
BLK
P5
P7
P8
P6
C40
.1
250V
R59
Fr22
2W
R60
Fr22
2W
WJ1-A
RED
WJ2-A
BLK
R52
2.2k
1W
D10
WHITE
PILOT LIGHT
P2A P2B
P3A P3B
R61
10k
WJ4-A
BLK
WJ5-A
WHT
WJ4-B
BLK
WJ5-B
WHT
R58
Fr22
2W
C47
.01
P26
P25
WJ3
WHT
P17
C20
.047
630V
C41
.1
250VAC
1
2
R62
22k
P18
WJ11
ORN
S1-A
CHANNEL SELECT
S1-B
CHANNEL SELECT
WHITE
S1-C
P20 P27
WJ9
YEL
WJ10
BL
1
P31
WJ12
BRN
1
2
R56
180
J4
EXTENSION
WJ14-B
WHT
WJ15-B
BLK
J5
MAIN
WJ17
BLK
WJ18
WHT
C18
220pF
500V
C32
220pF
1G
2
D
3
S
Q3
FDP7N60NZ
WJ16-A
RED
WJ16-B
RED
1
2
R42
5.6M
1
2
R63
5.6M
D21
1N4006
R75
470k
1W
C39
22
-t
RT1
C60-11
F2
T8AL
250V
R64
3.9k
R65
100k
P9
WJ6
BLK
TP3
+310VDC
TP1
+320VDC
TP2
+305 VDC
TP4
+295VDC
TP5
+265VDC
TP6
+24.6VDC
TP7
3.3VAC
TP8
3.3VAC
TP9
+15.5VDC
TP10
+12VDC
TP11
+12VDC
TP12
+11.5VDC
TP14
+0.00 VDC
TP15
+1.0VDC
TP16
+1.39VDC
TP19
10mVAC
TP20
730mVAC
TP21
720mVAC
TP22
35mVAC/CH1
87mVAC/CH2
TP23
1.95VAC/CH1
4.74VAC/CH2
TP17
1.9VAC/CH1
4.60VAC/CH2
TP18
1.9VAC/CH1
4.60VAC/CH2
TP24
64VAC/CH1
126VAC/CH2
TP25
64VAC/CH1
126VAC/CH2
TP26
7.5VAC/CH1
15.3VAC/CH2
TP27
29mVAC/CH1
60mVAC/CH2
X
X
B+
Y X
Z
B+
Z
Y
+15V
Z
Z
CATHODE
+15V
CHANNEL_SELECT
GND_DC1
+15V
CHANNEL_SELECT
CHANNEL_SELECTM
+15V
CHANNEL_SELECTM
GND_DC1
GND_DC1
GND_DC1
P1B-4
P1B-4
P1A-4
P1A-4
P1A-6
P1A-6
P1B-6
P1B-6
+15V+15V
CHANNEL_SELECTMCHANNEL_SELECTPB
GND_DC1
GNDA1
GNDA1
GNDA1
GNDA1
Z
Z
ZYX
YX
CATHODE
CATHODE
CATHODE
GND_DC1 GND_DC1
GNDA1
GND_DC1