Service Manual Template - Schematic Hell

BASSBREAKER™ 15 (This is the model name for warranty claims)

Fender Musical Instruments Corp. / 17600 North Perimeter Drive, Suite 100 / Scottsdale, AZ 85255-5440 Issued June, 2016

p/n 2262000000 (COMBO 120V) p/n 2263000000 (HEAD 120V)

SERVICE MANUAL

ATTENTION:

WARRANTY SERVICE PROCEDURES

The Bassbreaker 15 Amplifier is considered to be field serviceable to the component level. As such stuffed PCB Assemblies 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.

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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 maintenance. All information is not to be dis-closed to others without the expressed permission of Fender 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 the “⚠” symbol indicate the re-

quired use of that specific part. This is necessary 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

CAP AE = 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

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SPECIFICATIONS

Model Name: BASSBREAKER 15 Combo

BASSBREAKER 15 Head

Release Number: PR 3034

(Not a model number)

Part Numbers (120V, 60Hz) US: 2262000000

COMBOS: (110V, 60Hz) TW: 2262001000

(240V, 50Hz) AUS: 2262003000

(230V, 50Hz) UK: 2262004000

(230V, 50Hz) ARG: 2262005000

(230V, 50Hz) EUR: 2160506000

(100V, 50Hz) JPN: 2262007000

(220V, 60Hz) ROK: 2262009000

Part Numbers (120V, 60Hz) US: 2263000000

HEADS: (110V, 60Hz) TW: 2263001000

(240V, 50Hz) AUS: 2263003000

(230V, 50Hz) UK: 2263004000

(230V, 50Hz) ARG: 2263005000

(230V, 50Hz) EUR: 2163506000

(100V, 50Hz) JPN: 2263007000

(220V, 60Hz) ROK: 2263009000

Power Requirement: 95W

Power Output: 15W RMS into 4, 8, or 16 Ohms @ ~15 %THD

Impedances Input : 1 Meg Ohms

Line Out: 100 Ohms

Effects Loop SEND: 900 Ohms

Effects Loop RETURN: 22k Ohms

Dimensions (Combo) Height: 17.5 in (44.5 cm)

Width: 19.56 in (49.7 cm)

Depth: 9.0 in (22.9 cm)

Weight: 44 lbs (20 kg)

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Dimensions (Head) Height: 9.75 in (24.8 cm)

Width: 19.56 in (49.7 cm)

Depth: 8.81 in (22.4 cm)

Weight: 27 lbs (12.3 kg)

Product specifications are subject to change without notice

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SERVICE NOTES

As modern day amplifiers are more compact and sophisticated proper wire dress becomes a critical issue, both for the sake of Safety and FCC Certification. It is highly recommended that before disassembly you take digital photos to use as a reference during reassembly, for wire and component dress. Factory set locations for wire dress, wire ties, ferrites, and anchors should be maintained at all times. Use the following proce-dures to disassemble the Bassbreaker 15 for service access. Please note that all coaxial ca-bles use multi-pin connectors which are all of the same type. During the removal process for all of the PCBs these connectors will need to be disconnected. Since they are all the same in or-der to prevent confusion and miss-wiring it his highly recommended that colored markers or labels be used to ID the proper cable connector PCB Header relationship. Also again as stated several photos should be taken to assure prop-er wire dress during reassembly. CHASSIS REMOVAL is accomplished by first re-moving the five (5) screws from the rear upper screen panel. Next remove the five (5) screws which secure the rear lower panel to the cabinet. On the Combo Version Only disconnect the Speak-er Terminal Wires at the Speaker. Remove the two (2) side chassis screws (4 total) on the left and right side of the cabinet. Now supporting the chassis re-move the two (2) top chassis screws and remove the chassis from the cabinet. Access to the inside of the chassis can then be accomplished by removing the seven (7) screws which secure the rear chassis cover and folding it back out of the way. REAR PANEL PCB ASSEMBLY REMOVAL is ac-complished by first marking and unplugging the five (5) PCB multi-wire connectors at designation #P44-P48 from the I/O PCB Assembly. Next remove the two screws holding the Line Out XLR Jack to the

Rear Panel. Remove the two EFX Loop Jack Nuts and Washers from the rear panel noting their makeup for reassembly. Remove the six (6) PCB Mounting standoff screws from the PCB and sepa-rate the PCB from the Rear Panel. TOP PANEL INPUT PCB ASSEMBLY REMOVAL is accomplished by marking and unplugging the four (4) multi-pin connectors P30-P33 on the Input PCB Assembly. Remove the Gain Knob, Control Nut and Washer. Remove the nut and washer from the input jack. You can now remove the Front Panel Input PCB Assembly. SPEAKER JACK PCB ASSEMBLY REMOVAL begins by disconnecting the four (4) fast-on con-nectors P107-P110 from the PCB. Remove the Speaker Jack nuts and washers (Noting their makeup for reassembly). The PCB can now be re-moved from the chassis. IMPEDANCE SELECTOR SWITCH PCB ASSEM-BLY REMOVAL is initiated by disconnecting the seven (7) fast-on connectors noting the color code indicated on the PCB. Remove the two (2) screws holding the PCB Assembly to the back panel. The PCB Assembly can now be removed from the chas-sis. GAIN/STRUCTURE CONTROL PCB ASSEMBLY REMOVAL is started by marking and unplugging the five (5) multi-pin connectors P39-P43. Remove the control knob, nut, and washer. The PCB can now be removed. CONTROL PCB ASSEMBLY REMOVAL begins by marking and unplugging the five (5) multi-pin con-nectors P34-P38. Clip the wire tie located on the rear right corner of the PCB. Remove the five (5) top panel control knobs, nuts and washers to sepa-rate the PCB from the Top Panel.

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TUBE PCB ASSEMBLY REMOVAL starts by re-moving the tubes and the thirteen (13) screws which hold the PCB to the bottom side of the chas-sis. At this point by pulling up on the PCB and tilting it forward you should have enough access to re-place most of the components located on the board. If it becomes necessary to remove the PCB it is best done by also removing the Power Supply PCB Assembly at the same time. This is due to the fact that the boards are hardwired together. The proce-dure for removing the Power PCB Assembly follows below. Again it is a very good idea to take a few dig-ital photos and color marking or labeling all multi-pin connectors before disassembly to make sure origi-nal factory wiring and wire dress is maintained. POWER PCB ASSEMBLY REMOVAL as stated above must be accomplished by first removing the Rear Panel PCB Assembly, Speaker Jack PCB As-sembly, Input PCB Assembly, Gain/Structure PCB Assembly, and the Control PCB Assembly. Once

these PCB assemblies have been removed you will have full access to the top side of the Power PCB Assembly. Before attempting to remove the Tube PCB and Power PCB Assemblies as a unit every attempt should be made to repair the Power PCB Assembly from the top side. If top side repair is im-possible then proceed with the Tube PCB/Power PCB Removal. Start the Tube PCB Assembly and Power Supply PCB Assembly removal by marking and disconnect-ing the fast-on connections from the Power Transformer, Output Transformer, Choke and Mute Switch. These are labeled as P3-P8, P49, & P50 from the Power Supply PCB and P21-P23, P25 & P27 from the Tube PCB. Remove the thirteen (13) screws securing the Power Supply PCB to the Chassis bottom. At this point you should be able to carefully remove the two (2) PCB Assemblies from the chassis.

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 con-

tact the FMIC Customer Service Department to or-der 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 in-formation wherever possible.

PRE-AMPLIFIER

The guitar input signal is injected into INPUT jack J6 on the INPUT PCB. Via a coax, this signal is fed to the TUBE PCB to the first tube gain stage (V5-A).

AC coupling cap C56 feeds the GAIN control via a coax. GAIN control R123 is on the INPUT PCB. A coax sends this signal to the GAIN CONTROL PCB to be routed via the first section of rotary switch S1.

The S1 rotary switch is a two section control that provides signal routing for the LOW, MED, & HIGH Gain STRUCTUREs available.

For the LOW Gain STRUCTURE, S1-A &B routes the V5-A signal directly to gain stage U4-B to drive the tone controls. The LOW Gain STRUCTURE provides 2 stages of tube gain before the tone con-trols.

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For the MED Gain STRUCTURE, S1-A routes the V5-A signal to gain stage V4-A. S1-B routes this medium gain signal to V4-B & then the tone con-trols. The MED Gain STRUCTURE provides 3 stages of tube gain before the tone controls.

For the HIGH Gain STRUCTURE, the GAIN control feeds gain stage V5-B directly. This additionally amplified signal is then fed to gain stage V4-A via rotary switch S1-A. S1-B routes this signal to V4-B & then the tone controls. The HIGH Gain STRUC-TURE provides 4 stages of tube gain before the tone controls.

Following the V4-B stage (common to LOW, MED, & HIGH Gain STRUCTUREs), AC coupling cap C64 feeds a coax to send the signal to the TRE-BLE/BASS/MID tone control circuit (R126, R124, & R125 respectively) found on the CONTROL PCB. The MASTER VOLUME control (R127) follows the tone controls.

The MASTER VOLUME control’s wiper output is coaxially coupled to the EFFECTS LOOP’s op amp circuitry (U1-A & -B and U2-A). The EFFECTS LOOP circuitry is found on the REAR PANEL PCB. The EFFECTS LOOP SEND is J3; the RETURN is J4. The EFFECTS LOOP circuitry is optimized to work with low-level stomp boxes.

The EFFECTS LOOP output signal is routed to the POWER SUPPLY PCB. Op-amps U8-A & -B condi-tions the signal to the reverb card (attached to P5 - FMIC p/n 0096569000). This is a digital hall RE-VERB “daughter card” mounted above the POWER SUPPLY PCB. The REVERB wet output signal is then routed to the CONTROL PCB where control R128 allows the user to set the REVERB’s wet out-put level for its wet/dry mix.

The EFFECTS LOOP output (U2-A) and the RE-VERB output (U9-B) are sent to summing op-amp U2-B on the REAR PANEL PCB to create the RE-VERB’s wet/dry mix. The output of U2-B feeds the POWER AMP input. JFET Q1 is placed at the non-inverting input of U2-B to kill the signal to the power amp if the amp is placed in MUTE mode.

The LINE OUT signal remains active for silent re-cording when the amp is configured in MUTE.

The reverb for the line out is summed with the dry signal at op-amp U3-A. An active filter circuit is configured around op-amp U3-B to provide the LINE OUT’s SPEAKER CABINET EMULATION equalization when enabled through switch S3. Switch S4 disconnects the chassis ground connec-tion to the shell of XLR jack J5 (GROUND LIFT).

POWER AMPLIFIER

The Power Amplifier is a push-pull design using two EL84s power tubes (V1 & V2) found on the TUBE PCB. Both V1’s & V2’s cathode bias is set to ap-proximately 40mA using 5W power resistors R70 & R134. Their screen grid bias is set through R77 & R80.

The power amp’s input is a long tail pair phase in-verter configuration. This differential amplifier uses both halves of a 12AX7 (V3-A & -B). V3’s differen-tial plate signals are AC coupled to the grids of the EL84 power tubes.

The EL84 plates drive a custom designed multi-tap output transformer (T1 – FMIC # 7706195000) to provide an impedance match for 4, 8, & 16 Ohm speaker loads. Its primary is connected onto the TUBE PCB and its secondary is connected to the IMPEDANCE SWITCH PCB mounted on the rear panel. The output transformer tap is selected using S2 (also on the IMPEDANCE SWITCH PCB).

For the COMBO version, the internal speaker is connected to output transformer secondary thru terminals P109 & P110. The COMBO’s internal speaker is disconnected when the MAIN SPEAKER jack (J1) is connected to a speaker load through the ¼” jack. The EXTENSION SPEAKER (J2) will work in tandem with either the internal or EXTERNAL speaker. Obviously, the impedance selector switch should be set to match the effective speaker load connected internally & externally to the amplifier.

For the HEAD version, the amplifier can only drive a speaker load if the MAIN SPEAKER jack (J1) is connected to a ¼” plug. The EXTENSION SPEAKER (J2) will work in tandem with the MAIN SPEAKER. Obviously, the impedance selector switch should be set to match the effective speaker load connected externally to the amplifier.

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POWER SUPPLY/MUTE

The Power Supply circuitry is found on the POWER SUPPLY PCB. Its circuitry is typical of a Fender tube amplifier with a choke input filter. The second-ary side of the Power Transformer consists of 3 windings: high-voltage winding, low-voltage winding and heater winding.

The high voltage red/red secondary winding is used to generate the high voltage DC power supplies in the amplifier. The high voltage DC power supply is energized through a full-wave bridge rectifier con-figuration to filter cap C80. A choke is inserted between C80 & C42. The output of this supply filter provides B+ to the plates of the EL84 power tubes. The “voltage-drop” resistors R58, R59, & R61, along with their associated filter capacitors C43, C44, & C49, subsequently provide the DC screen-grid voltages for the power tubes and plate voltages for the preamp tube stages in the design. These supplies are routed to the TUBE PCB circuitry through 18 AWG wiring between the two PCBs.

The low voltage brown/brown secondary winding feeds a full-wave bridge & filter configuration to cre-ate input DC voltages for regulators U5-U7. These heat-sinked ICs generate the low voltage +/-15.6V & +5V DC power supplies. A primary function of the U5 & U6 power supplies is to provide DC filament drive to the preamp tube heaters (V3-5). The DC bipolar filament voltages couple to the heaters

through R63 & R64 on the POWER SUPPLY PCB. A cable connects this supply to the filaments on the TUBE PCB at P29. A cable also connects the low voltage supplies to the REAR PANEL PCB & CON-TROL PCB to power their op-amp analog signal processing & control circuitry. The +5V supply powers the reverb card that is mounted as a daugh-ter card on the POWER SUPPLY PCB.

The green/green heater secondary winding produc-es a 6.8VAC power supply that energizes the EL-84 power tube (V1 & V2) heater filaments. This sec-ondary does not supply preamp tube filament drive as explained above. This secondary is connected to terminals on the TUBE PCB.

The POWER INDICATOR LED installed inside the control panel jewel. It is controlled by the LM555 timer installed at U4. U4’s output drives this LED through R46 via its connections to the red & white wires routed from the rear panel to the control pan-el.

If the MUTE is enabled, the LED will flash several times per second. When this is flashing, audio is not delivered to the power amp input and nothing should be audible. This allows “silent recording” capability through the rear panel’s LINE OUT con-nection.

If the MUTE is disabled, the amplifier should be ca-pable of delivering audio through an internal &/or an external speaker connection.

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* 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 0019993000 ⚠CAP AE AX 2200µF 35V 20% C32, C50

3 0051720000 ⚠CAP AE AX 22µF 450V 20% C44, C49, C80

2 0054360000 ⚠CAP AE AX 22µF 450V 20% 105C C42-43

3 0028463003 CAP AE RDL 10µF 50V 20% C37, C45-46

1 0028458003 CAP AE RDL 1µF 50V 20% C35

4 0028459003 CAP AE RDL 2.2µF 50V 20% C40, C51, C58, C65

4 0028467003 CAP AE RDL 22µF 50V 20% C8, C10-11, C33

6 0028471003 CAP AE RDL 47µF 50V 20% C60, C62, C66, C78-79, C83

3 0039270001 CAP CA .01µF 50V C3, C9, C28

10 0038703001 CAP CA .1µF 50V C17-18, C21-22, C26-27, C38-39, C71-72

6 0039259001 CAP CA 220pF 100v LL C1-2, C4-7

10 0038873001 CAP CA 22pF 100V LL C15, C19-20, C23-24, C29, C48, C52, C70, C77

4 0051458003 CAP CD 470pF 500V 10% C54, C69. C75, C81

4 0025995000 CAP CD 8200pF 1000V 20% C30-31, C36, C41

1 0027255003 CAP MPF .001uF 100V 10% C25

1 0027262003 CAP MPF .0068uF 100V 10% C76

1 0027264003 CAP MPF .01uF 100V 10% C14

1 0027272003 CAP MPF .047uF 63V 10% C63

1 0027279003 CAP MPF .1uF 100V 10% C34

1 0053860000 ⚠CAP MPF .1uF 250VAC 20% C47

1 0027278003 CAP MPF .1uF 63V 10% C13

2 0027281003 CAP MPF .22uF 63V 10% C12, C16

1 0024823000 CAP MPF RDL .01uF 400V 10% C55

4 0024833000 CAP MPF RDL .022uF 400V 10% C53, C57, C64, C73

1 0024845000 CAP MPF RDL .047uF 400V 10% C74

1 0024853000 CAP MPF RDL .1uF 250V 10% C59

1 0024854000 CAP MPF RDL .1uF 400V 10% C61

1 0037666002 CAP PFF .001uF 400V 10% C68

2 0026202002 CAP PFF .0022uF 400V 10% C56, C67

1 7706518000 CTRL SNAPIN 25k 10A TAPER 180ｰ-D SHAFT R125

1 0096458000 CTRL SNAPIN 1M 5A TAPER 180ｰ-D SHAFT R124

2 0096459000 CTRL SNAPIN 250K 15A TAPER 180ｰ-D SHAFT R123, R127

1 0096460000 CTRL SNAPIN 250K 30A TAPER 180ｰ-D SHAFT R126

1 0096463000 CTRL SNAPIN 25k B TAPER 180ｰ-D SHAFT R128

10 0026730001 DIODE 1N4006 800V 1A D2-11

1 0006260001 DIODE 1N4448 SIGNAL D1

2 0047482060 DIODE ZEN 1N5366B 39V 5W 5% D12-13

12 0026000001 FSTN TAB MALE .187x.032 PCB MT P23, P25, P27, P49-50, P100-106

10 0025802000 FSTN TAB MALE .250x.032 PCB MT P2-4, P6-8, P12-13, P21-22

2 0031041000 FSTN TAB ML RTANG PCB .25x.032 P107-108

2 7708801000 ⚠FUSE 213 TYPE 22.5 x 5.8 TIME LAG 1A AXL F1-2

1 7708800000 ⚠FUSE 213 TYPE 22.5 x 5.8 TIME LAG 3.15A AXL F3

1 0072485000 HDR .1 CTR 6 CKT SQ PIN LONG P5

28 0072493000 HDR 2.5mm CTR 2 CKT SQ PIN P1, P11, P15-20, P24, P26, P28, P30-36, P38-45, P47-48

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6 0072495000 HDR 2.5mm CTR 3 CKT SQ PIN P9-10, P14, P29, P37, P46

1 9902205550 IC TIMER LM555 U4

5 0016795000 IC OP-AMP DUAL TL072 U1-3, U8-9

1 0013562000 IC REGULATOR +15V MC7815CT U6

1 0041812000 IC REGULATOR +5V MC7805CT U7

1 0013564000 IC REGULATOR -15V MC7915CT U5

2 0051007000 JACK 1/4 PCB STEREO W/ SWITCH J3-4

3 0063213000 JACK PCB STEREO CLOSED CKT J1-2, J6

6 REF Jumper W1-6

2 0026368001 RES CF 1/2W 5% 100ohm LL R78-79

2 0024967001 RES CF 1/4W 5% 1.2k LL R94, R98

1 0025073001 RES CF 1/4W 5% 1.5M LL R47

1 0024969001 RES CF 1/4W 5% 1.5k LL R97

8 0024997001 RES CF 1/4W 5% 100k LL R8, R13, R21, R45, R54, R56, R74, R111

2 0024952001 RES CF 1/4W 5% 100ohm LL R132-133

21 0024981001 RES CF 1/4W 5% 10k LL R10, R19-20, R23-26, R33-40, R49, R84-86, R106, R130

1 0028549001 RES CF 1/4W 5% 110k LL R104

2 0028955001 RES CF 1/4W 5% 130k LL R4, R103

2 0024985001 RES CF 1/4W 5% 15k LL R55, R60

1 0024986001 RES CF 1/4W 5% 18k LL R102

5 0025069001 RES CF 1/4W 5% 1M LL R9, R22, R87, R93, R105

8 0024965001 RES CF 1/4W 5% 1k LL R7, R12, R14-16, R18, R57, R62

4 0025075001 RES CF 1/4W 5% 2.2M LL R66, R91, R112, R118

1 0024971001 RES CF 1/4W 5% 2.2k LL R82

1 0029006001 RES CF 1/4W 5% 20k LL R42

5 0025059001 RES CF 1/4W 5% 220k LL R11, R27, R51, R90, R100

5 0024987001 RES CF 1/4W 5% 22k LL R17, R29, R31, R50, R131

5 0025060001 RES CF 1/4W 5% 270k LL R28, R30, R75, R122, R129

1 0024988001 RES CF 1/4W 5% 27k LL R43

3 0025077001 RES CF 1/4W 5% 3.3M LL R5, R83, R117

1 0024973001 RES CF 1/4W 5% 3.3k LL R41

1 0029604001 RES CF 1/4W 5% 300ohm LL R101

2 0025079001 RES CF 1/4W 5% 4.7M LL R6, R116

4 0024977001 RES CF 1/4W 5% 4.7k LL R44, R46, R113-114

4 0025065001 RES CF 1/4W 5% 470k LL R1-2, R69, R95

3 0024993001 RES CF 1/4W 5% 47k LL R92, R115, R121

8 0024947001 RES CF 1/4W 5% 47ohm LL R32, R71, R76, R81, R109-110, R119-120

2 0028034001 RES CF 1/4W 5% 5.1k LL R52-53

1 0028018001 RES CF 1/4W 5% 510k LL R3

2 0024995001 RES CF 1/4W 5% 68k LL R73, R96

1 0029617001 RES CF 1/4W 5% 750k LL R48

2 0024980001 RES CF 1/4W 5% 8.2k LL R89, R99

1 0024964001 RES CF 1/4W 5% 820ohm LL R88

6 0027353001 RES FILM 1W 5% 100k LL R65, R67-68, R72, R107-108

1 0037664001 ⚠RES MOX FP 1W 5% 1k LL R58

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2 0051417001 RES MOX 2W 5% 22ohm LL R63-64

2 0034705001 RES MOX 2W 5% 270ohm LL R77, R80

2 0036469001 ⚠RES MOX FP 1W 5% 4.7k LL R59, R61

2 0028898000 RES WW BT 5W 5% 240ohm R70, R134

2 0050817000 SWITCH PB PC VERT MNT DPDT S3-4

1 0028091000 SWITCH PUSH SLFLK SHORT STROKE S5

1 7706795000 SWITCH SLIDE DPTT PC MOUNT BTN SLOT S2

1 7707764000 SWITCH ROTARY 2P3T BBM PCB MT S1

1 0028503000 ⚠THERMISTOR 10 ohm 5A C60-11 RT1

1 7709441000 LED TULIP PANEL MOUNT ASSY WHITE 14" RED =WJ15, BLK =WJ13

1 0049892000 XLR CONNECTOR MALE GOLD J5

1 0041465003 XSTR N-CH JFET J113 TO-92 Q1

3 0050849000 ⚠HEATSINK PCB LEVEL 576012 @ U5-7

5 0029167000 ⚠TUBE SOCKET 9 PIN PCB MOUNT @ V1-5

3 0039420000 SCRW M 4-40x3/8 PHP SS SE @ U5-7

3 0097360000 NUT HEX 4-40 EX LOCK @ U5-7

1 7710500000 RING RETENTION ROT SW CK @ S1

3 0028104000 BUTTON PUSH SWITCH BLACK S3-5

2 0065384000 EXTENSION BUTTON 2.8mm SHAFT @ S3-4

13 0097360000 NUT HEX 4-40 EX LOCK @ TUBE PCB ASSY. STANDOFFS

13 0038519000 STANDOFF M/F 4-40 x 1/4L @ TUBE PCB ASSY STANDOFFS

4 0053952000 STANDOFF NYLON BLK 0.25" @ POWER PCB FOR REVERB CARD

FOR COMBO ONLY

2 0026000001 FSTN TAB MALE .187x.032 PCB MT P109-110

FOR HEAD ONLY

1 REF WIRE JUMPER JMP 1

PARTS LIST: CHASSIS ASSEMBLY COMBO


1 7706192000 ⚠XFMR PWR 15W EL84 120V

1 7706193000 ⚠XFMR PWR 15W EL84 230V/240V

1 7706194000 ⚠XFMR PWR 15W EL84 100V

1 7706195000 ⚠XFMR OUTPUT 15W 4/8/16 OHMS

1 0036486000 ⚠CHOKE RE-ISSUE TUBE AMPS

1 7706196000 ⚠*PCB ASSY BASSBREAKER 15

1 0096569000 ⚠*PCB ASSEMBLY REVERB

7 7706965000 KNOB BASSBREAKER FLAT 180 DEG

1 0091860000 JEWEL PILOT LITE WHITE

1 0032219000 COLLAR-PILOT LIGHT

1 0031625000 NUT HOLDER PILOT LIGHT 11/16-27

2 0036570000 ⚠SWITCH TOGGLE DPST W/NUTS

2 0022293000 WSHR FLAT .473x.750 NI @ Toggle Switches

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PARTS LIST: CHASSIS ASSEMBLY COMBO


1 0036702000 ⚠FUSE HOLDER 3AG FINGER GRIP

1 0036703000 ⚠FUSE HOLDER 5MM FINGER GRIP EXPORT

1 0048827000 ⚠FUSE QA 1-1/4x1/4 250v 2A

1 0020789000 ⚠FUSE QA 20mmx5mm250V 1A EXPORT

1 0054642000 ⚠CONNECTOR IEC SNAP IN

1 5550112406 TUBE 7025/12AX7WC RUSN FENDER V3

2 5550112391 TUBE 7025/12AX7A ECC83S GT-GOLD V1, V2

1 5550113580 TUBE EL84-S SLOVAKIA MATCHED DUET V4, V5

2 7706159000 RETAINER TUBE EL84 BASSBREAKER

4 0039371000 SPRING RETAINER TUBE 1.81Lx.15

2 0079630000 GROMMET RUBBER .38 ID x .500 MTG

3 0064512000 COLLAR TUBE SHIELD 9PIN

3 0023598000 TUBE SHIELD (099-0723-000)

3 0069393000 NUT 6-32 HEX EXT LOCK

8 0022004000 NUT KEPS #8-32 ZINC

3 0014206000 SCREW #6-32 x ¼ UFHP BLX

13 0031188000 SCRW M 4-40x1/4 PHP ZI ITWS

4 0014999000 SCRW M 6-32X1/4 PHP BLX

20 0064836000 SCRW M 6-32x1/4 PHP ZI SEMS

2 0021568000 SCRW M 6-32x3/16 PHP NI


2 0048890000 SCRW TF 4-40x1/4 PHP BLX

8 0038900000 SCRW TF 6-32X1/4 PHP ZI

5 0031153000 WASHER FLAT 3/8 X .614 NICKEL

2 9904300100 WASHER LCK INTL 3/8x.681x.032

1 0018022000 BUSHING SNAP 5/16x17/32 BLK

1 0031263000 BUSHING SNAP SHORT 3/4X15/16 BLK

2 0012560000 BUSHING SNAP 5/8x27/32 BLK2096

1 0078863000 CABLE ASSY XH 2-CKT COAX 10”


2 7707861000 CABLE ASSY XH 3-CKT 12”

11 0091149000 CABLE ASSY XH 2-CKT COAX 5"

1 7707599000 CABLE ASSY XH 3-CKT 7”

PARTS LIST: CHASSIS ASSEMBLY - HEAD


1 7706192000 ⚠XFMR PWR 15W EL84 120V

1 7706193000 ⚠XFMR PWR 15W EL84 230V/240V

1 7706194000 ⚠XFMR PWR 15W EL84 100V

1 7706195000 ⚠XFMR OUTPUT 15W 4/8/16 OHMS

1 0036486000 ⚠CHOKE RE-ISSUE TUBE AMPS

1 7708263000 ⚠*PCB ASSY BASSBREAKER 15 HEAD

1 0096569000 ⚠*PCB ASSEMBLY REVERB

7 7706965000 KNOB BASSBREAKER FLAT 180 DEG

13







PARTS LIST: CHASSIS ASSEMBLY - HEAD


1 0091860000 JEWEL PILOT LITE WHITE

1 0032219000 COLLAR-PILOT LIGHT

1 0031625000 NUT HOLDER PILOT LIGHT 11/16-27

2 0036570000 ⚠SWITCH TOGGLE DPST W/NUTS

2 0022293000 WSHR FLAT .473x.750 NI

1 0036702000 ⚠FUSE HOLDER 3AG FINGER GRIP

1 0036703000 ⚠FUSE HOLDER 5MM FINGER GRIP EXPORT

1 0048827000 ⚠FUSE QA 1-1/4x1/4 250v 2A

1 0020789000 ⚠FUSE QA 20mmx5mm250V 1A EXPORT

1 0054642000 ⚠CONNECTOR IEC SNAP IN

1 0070228000 TUBE 7025/12AX7WC RUSN FENDER

2 0074287400 TUBE 7025/12AX7A ECC83S GT-GOLD

2 0097124000 TUBE EL84-S SLOVAKIA

2 7706159000 RETAINER TUBE EL84 BASSBREAKER

4 0039371000 SPRING RETAINER TUBE 1.81Lx.15

2 0079630000 GROMMET RUBBER .38 ID x .500 MTG

3 0064512000 COLLAR TUBE SHIELD 9PIN

3 0023598000 TUBE SHIELD (099-0723-000)

3 0069393000 NUT 6-32 HEX EXT LOCK

8 0022004000 NUT KEPS #8-32 ZINC

3 0014206000 SCREW #6-32 x ¼ UFHP BLX

13 0031188000 SCRW M 4-40x1/4 PHP ZI ITWS

4 0014999000 SCRW M 6-32X1/4 PHP BLX


2 0021568000 SCRW M 6-32x3/16 PHP NI


2 0048890000 SCRW TF 4-40x1/4 PHP BLX

8 0038900000 SCRW TF 6-32X1/4 PHP ZI

1 0031263000 BUSHING SNAP SHORT 3/4X15/16 BLK

2 0012560000 BUSHING SNAP 5/8x27/32 BLK2096

1 0026438000 PLUG BUTTON .437" BLACK #2633



2 7707861000 CABLE ASSY XH 3-CKT 12”

11 0091149000 CABLE ASSY XH 2-CKT COAX 5"

1 7707599000 CABLE ASSY XH 3-CKT 7”

2 9904300100 WASHER LCK INTL 3/8x.681x.032

5 0031153000 WASHER FLAT 3/8 X .614 NICKEL

PARTS LIST: CABINET ASSEMBLY - COMBO


1 7706188000 *CABINET ASSY BASSBREAKER 15 COMBO COMPLETE CABINET

14







PARTS LIST: CABINET ASSEMBLY - COMBO


2YD 7706172000 COVERING TWEED BLACK

2YD 0026317000 ⚠CLOTH GRILLE BLACK PVC

1 7706170000 ⚠HANDLE BASSBREAKER SERIES

4 0064162000 NUT T 8-32X1/2 STR 3 SPNG BLX #8 T-NUT FOR HANDLE

4 7704305000 SCRW M 8-32x3/4 OHP NI HANDLE SCREWS

8 0011678000 SCREW SMA #8 1-1/2 OHP BLX SPKR BAFFLE SCREWS

8 0029527000 WSHR FNSH 8-5/8 FLNGD BLX WX BAFFLE SCREW CONE WASHER

4 0048976000 FOOT RUBBER 1-1/2"

4 0033380000 SCRW SMAB 8X1 RHP BLX FEET SCREWS

4 0021972000 NUT T 10-32X3/4 STR 3 PRNG BLX

1 7706201000 *NAMEPLATE BASSBREAKER 15

3 0075721000 SCREW SMA #6x5/8 FHP BLX EXTENSION SCREWS

PARTS LIST: CABINET ASSEMBLY - HEAD


1 7706207000 *CABINET ASSY BASSBREAKER 15 HEAD COMPLETE CABINET

2YD 0026317000 ⚠CLOTH GRILLE BLACK PVC

2YD 7706172000 COVERING TWEED BLACK

1 7706170000 ⚠HANDLE BASSBREAKER SERIES

4 0064162000 NUT T 8-32X1/2 STR 3 SPNG BLX #8 T-NUT FOR HANDLE

4 7704305000 SCRW M 8-32x3/4 OHP NI HANDLE SCREWS

8 0011678000 SCREW SMA #8 1-1/2 OHP BLX BAFFLE SCREWS

8 0029527000 WSHR FNSH 8-5/8 FLNGD BLX WX BAFFLE SCREW CONE WASHER

4 0048976000 FOOT RUBBER 1-1/2"

4 0033380000 SCRW SMAB 8X1 RHP BLX FEET SCREWS

4 0021972000 NUT T 10-32X3/4 STR 3 PRNG BLX

1 7706201000 *NAMEPLATE BASSBREAKER 15

3 0075721000 SCREW SMA #6x5/8 FHP BLX EXTENSION SCREWS

PARTS LIST: END ITEM ASSEMBLY – COMBO


1 7706187000 ⚠*PANEL REAR PERF BB15

1 7706157000 *LOGO FENDER BASSBREAKER SERIES

1 7700343000 SPKR CELESTION V12-70

6 0036619000 SCRW M 10-32x1-1/2 THP NI

5 0037215000 WSHR C/SUNK NICKEL #6

5 0016188000 SCRW WOOD 6x1 OHP NI

4 0047821000 SCRW M 10-32 3/4 THP STL BLX

5 0067014000 SCRW SMA 6X5/8 THP BLX

4 0029821000 EYELET RFLNGD .215 OD x.315 L

2 0037210000 SCRW SMA 2x3/8 OHP NI

1 0047248000 ⚠CORD PWR W/ IEC DOM

15







PARTS LIST: END ITEM ASSEMBLY – COMBO


1 0047251000 ⚠CORD PWR W/IEC CONN 230V

1 0047249000 ⚠CORD PWR W/IEC CONN 230V UK


1 0053997000 ⚠CORD PWR W/IEC CONN 100V JPN

1 0057674000 ⚠CORD PWR W/IEC 230V ARG

PARTS LIST: END ITEM ASSEMBLY- HEAD QTY. PART # DESCRIPTION REFERENCE DESIGNATION

1 7706187000 ⚠PANEL REAR PERF BB15

1 7706157000 LOGO FENDER BASSBREAKER SERIES

6 0036619000 SCRW M 10-32x1-1/2 THP NI

5 0067014000 SCRW SMA 6X5/8 THP BLX

4 0029821000 EYELET RFLNGD .215 OD x.315 L

2 0037210000 SCRW SMA 2x3/8 OHP NI

1 0047248000 ⚠CORD PWR W/ IEC DOM


1 0047249000 ⚠CORD PWR W/IEC CONN 230V UK


1 0053997000 ⚠CORD PWR W/IEC CONN 100V JPN

1 0057674000 ⚠CORD PWR W/IEC 230V ARG

16


Service Diagram List Service Diagram (Schematic)………………………….….…………..…..Bassbreaker 15 Main PCB

Service Diagram (PCB Assembly)………………………………..……….Bassbreaker 15 Main PCB

B7706210000DATABASE FILE: Z3034S.SCH

06-NOV-15A

RELEASE DATE: 06-NOV-15

PCB ASSEMBLY P/N'S 7706169000 (COMBO) & 7708263000 (HEAD).

4. ALL DIODES ARE 1N4448.

5. THIS SCHEMATIC IS FOR PCB FABRICATION P/N 7706200000 AND

(POWER SUPPLY BYPASS CAPACITORS ARE 20%).

(UNLESS OTHERWISE NOTED)NOTES:

1. ALL RESISTORS IN OHMS, 5%; 1/4W.

3. ALL POLARIZED CAPACITORS IN uF, 20%; 50V MINIMUM.

2. ALL UNPOLARIZED CAPACITORS IN uF, 10% OR BETTER; 50V MINIMUM.

PR3034

SHEET: 1 OF 3

S M M

MAIN PCB ASSY

BASSBREAKER 15

ENGR: GIT'LODRAWN: GIT'LO

SERVICE DIAGRAM, COMBINEDTITLE:

DATE:

APPROVED BY:

DATE:

CHECKED BY:

A PROPRIETARY NATURE TO FENDER MUSICAL

THIS DOCUMENT CONTAINS INFORMATION OF

ATION FROM FENDER MUSICAL INSTRUMENTS.

TRANSMITTED TO OTHERS WITHOUT AUTHORIZ-

CONFIDENCE AND SHALL NOT BE DISCLOSED OR

INSTRUMENTS AND IS SUBMITTED TO YOU IN

R

SIZE DRAWING NUMBER REV.

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)

MUSICAL INSTRUMENTS

Corona, CA U.S.A.

C2 - CHECK V RATING

H

M

L

C8 - CHECK V RATING

16

8

4

REVERB_SEND

+

-

FEEDBACK

AT P5: REVERB CARD - P/N 0096569000

control pcb - REVERB

rear panel pcb

IMPEDANCE SWITCH PCB

INPUT PCB

INPUT PCB

GAIN CONTROL PCB

GAIN CONTROL PCBCONTROL PCB

TUBE PCB

TUBE PCB

TUBE PCB

TUBE PCB

TUBE PCB

add catch diodes to primary!!

coax

H

M

L

+

-

REAR PANEL PCB

TO 1/2 MUTE SWITCH

POWER SUPPLY PCB - UNDER REVERB CARD

POWER ON/

MUTE FLASHER

CONTROL PANEL

coax

coax

coax coax

coaxcoax

coax

TO 1/2 MUTE SWITCH

BLK

GRN/YLW

GRN

YLW

TO WJ21

RED

WHT

BLKBLKBLK

BRN

BLU

WHTWHT

GRYSPEAKER PCB

7. ALL VOLTAGES MEASURED WITH RESPECT TO CHASSIS GROUND USINGA DVM WITH AT LEAST 1MEG AC INPUT IMPEDANCE & 10MEG DC INPUT

IMPEDANCE. VOLTAGES MAY VARY +/- 20%.

NOMINAL TEST CONDITIONS:

8 OHM RESISTIVE LOAD CONNECTED AT MAIN SPEAKER OUT (J1)

PANEL CONTROL SETTINGS:

GAIN AT 12:00

BRIGHT SWITCH OUT

STRUCTURE CONTROL SWITCH SETTING: LOW

ALL OTHER CONTROLS FULLY CLOCKWISE (MAX) EXCEPT REVERB (MIN)

IMPEDANCE SELECTOR (S2 - BACK PANEL) SET TO 8 OHMS

8. ALL DC VOLTAGE TESTS (TEST POINT DENOTED BY SQUARE BOX AROUND TEST DATA) - NO AC INPUT TO J6

10. FILAMENT VOLTAGE TEST (TEST POINT 5) - NO AC INPUT TO J6; MEASURED ACROSS FILAMENT SECONDARY.

9. ALL AC VOLTAGE TESTS (TEST POINT DENOTED BY CIRCLE AROUND TEST DATA) - INJECT 5mV AC INPUT AT 1kHz TO J6

12. TEST POINT 39 - MUTE SWITCH SET TO DOWN POSITION TO PRODUCE A FLASHING POWER INDICATOR

ENERGIZE PRODUCT WITH NOMINAL LINE VOLTAGE & FREQUENCY AS DENOTED ON THE PRODUCT'S BACK PANEL

POWER SWITCH & MUTE SWITCH POSITIONED UP (POWER INDICATOR IS LIT CONSTANTLY, NOT FLASHING).

11. TEST POINT 38 (REVERB LEVEL) - REVERB CONTROL (R128) SET FULLY CLOCKWISE (MAX) FOR THIS TEST ONLY.

6. FOR COMBO: P109 & P110 INSTALLED; JMP1 NOT INSTALLED

FOR HEAD: P109 & P110 NOT INSTALLED; JMP1 INSTALLED

6

13. MAXIMUM OUTPUT TEST CONDITIONS:


PANEL CONTROL SETTINGS: TREBLE AT 12:00

BRIGHT SWITCH OUT

ALL OTHER CONTROLS INCLUDING GAIN: FULLY CLOCKWISE (MAX) EXCEPT REVERB (MIN)




AT TP30 (J1), OBSERVE CLIPPED OUTPUT OF 15W +/- 20% FOR THE FOLLOWING 1kHz INPUT SIGNAL LEVELS (J6) AT THE

THE 3 GAIN STRUCTURE SETTINGS (S1) BELOW:

GAIN STRUCTURE = LOW: INPUT = 15 mVrms

GAIN STRUCTURE = MED: INPUT = 3 mVrms

GAIN STRUCTURE = HIGH: INPUT = 0.3 mVrms

11

12

1313

REAR PANEL PCB

B EC 16-0015 31-MAR-16 S M M

J6

INPUT

R1122.2M

R85

10k

1

2

3

V5-A

12AX7A

6

7

8

V5-B

12AX7A

R68100k

1W

R971.5k

C65

2.2

C56.0022

400V

R115

47k

CW

R123

250k15A

GAIN

C69

470pF

R116

4.7M

S5-A

S5-B

BRIGHT

R84

10k

R107

100k

1W

R822.2k

C58

2.2

C67

.0022

400V

C68

.001

400V

R104

110k

R4

130k

1

2

3

A

S1-A

GAIN STRUCTURE

7

8

9

C

S1-B

GAIN STRUCTURE

R75

270k

R74

100k

1

2

3V4-A

12AX7A

6

7

8

V4-B

12AX7A

R65

100k

1W

R98

1.2kC66

47

C55

.01

400VC54

470pF

R69

470k

R73

68k

R95

470k

R96

68k

R108

100k

1W

R94

1.2kC62

47

C75

470pF

R12147k

C74

.047

400V

C73

.022

400V

CW

R126

250k30A

TREBLE

CW

R124

1M5A

BASS

CW

R125

25k10A

MID

R122

270k

C76

.0068

R111

100k

CW

R127

250k15A

MASTER

C61

.1

400V

1

2

3

V3-A

12AX7A

6

7

8

V3-B

12AX7A

R67

100k

1W

R72100k

1W

R87

1M

R88820

R93

1M

R92

47k

R86

10k

C57

.022

400V

C53

.022

400V

R100

220k

R90

220k

R99

8.2k

R89

8.2k

7

92

3

V1-A

EL84

7

92

3

V2-A

EL84

R70

240 5W

C6047

R80

Fr2702W

R77

Fr270

2W

P25

P27

P23

3

2

1

U1-A

TL072

5

6

7

U1-B

TL072

8

4

U1-C

R24

10k

R19

10k

R25

10k

R26

10k

J3

FX SEND

J4

FX RETURN

C8

22

C11

22

R14

1k

R10

10k

R71k C1

220pF

5%

C4

220pF

5% R8

100k

C5

220pF

5%

C2

220pF

5%

R11

220k

R16

1k

R15

1k

R27

220k

3

2

1

U2-A

TL072

5

6

7

U2-B

TL072

8

4

U2-C

R29

22k

R31

22k

R28

270k

R30

270k

R32

47

C19

22pF

5%

C20

22pF

5%

R33

10k

R34

10k

R20

10k

D S

G

Q1

J113

C15

22pF

5%

R21

100k

3

2

1

U3-A

TL0725

6

7

U3-B

TL072

8

4

U3-C

R36

10k

R37

10k

R39

10k

R40

10k

R38

10k

R35

10k

C23

22pF

5%

C24

22pF

5%

C14

.01

C25

.001

C12

.22 C16

.22

R41

3.3k

R44

4.7k

R42

20k

R43

27k

S3-A

CAB EMULATIONS3-B

R45

100k

R13

100k

C10

22

R12

1k

2

1

3

J5

LINE OUT

R17

22k

R18

1k

C6

220pF

5%

C7

220pF

5%D1

C3

.01

5%R9

1M

R6

4.7M

3

2

1

U8-A

TL072

5

6

7

U8-B

TL072

8

4

U8-C

3

2

1

U9-A

TL072

5

6

7

U9-B

TL072

8

4

U9-C

R55

15k

R60

15k

R57

1k

R62

1k

R56

100k

C48

22pF

5%

C52

22pF

5%

C33

22

R54

100k

P5

C40

2.2

C51

2.2

R53

5.1k

R52

5.1k

R51

220k

CW

R128

25kB

REVERB

C29

22pF

5%

R119

47

R120

47

R114

4.7k

R113

4.7k

C70

22pF

5%

P101

P102

P103

P104

C17

.1

C18

.1

C22

.1

C21

.1

C26

.1

C27

.1

C39

.1

C38

.1

C72

.1

C71

.1

C59

.1

250V

R106

10k

R101

300

R102

18k

C63

.047

WJ33

GRY

R1

470kR2

470k

R3

510k

R103

130k

R83

3.3M

R117

3.3M

R91

2.2M

R118

2.2MR66

2.2M

R110

47

R109

47

R71

47

R76

47

R81

47

WJ30GRN

WJ37BLK

WJ31YEL

WJ32

RED

WJ28ORG

WJ29BLK

W3

S4-A

GND LIFT

S4-B

C9.015%

S

T

R

TB

RB

J2

EXTENSION SPEAKER

J1

MAIN SPEAKER

P109

P110

P100

C28

.01

5%

C13

.1

R48

750k

R47

1.5M

R46

4.7k

R50

22k

P105 P107

P108P106

P17 P31

P32 P16

P24 P43P41

P19

P33 P42

P15 P39P40 P20

P26

P34

P30 P18

VCCGND

VCONTROL

THRESH

DISCHRG

RESET

OUTPUT

TRIG

1

2

3

4 5

6

7

8

U4

LM555

C64

.022

400V

WJ15

RED

WJ13

BLACK

R105

1M

1

2

3

4

S2-A 5

6

7

8

S2-B

WJ34BLK

R49

10k

WJ17RED

WJ16BLK

WJ2WHT

WJ3

BLK

P36

P38

P1

P47

P45 P28

P35 P48

P44P11

R5

3.3M

WJ35BLK

WJ36BLK

R23

10k

R22

1M

C77

22pF

5%

C78

47

D12

1N5366B

39V5%

R129

270k

1

2

R13010k

R131

22k

C79

47

R132

100

R133

100

1 2R134

240 5W

C83 47

D13

1N5366B 39V5%

C81

470pF

JMP1

TP13

+158VDC

TP14

+186VDC

TP15

+154VDC

TP16

+157VDC

TP17

+199VDC

TP18

+203VDC

TP19

+66VDC

TP20

+10.2VDC

TP21

+10.3VDC

TP22

5mVAC

TP23

272mVAC

TP24

1.33VAC

TP25

0.87VAC

TP26

1.14VAC

TP27

87mVAC

TP28

1.06VAC

TP29

0.98VAC

TP30

1.98VAC

TP31

87mVAC

TP32

89mVAC TP33

88mVAC

TP34

4mVAC

TP35

6mVAC

TP36

2mVAC

TP37

25mVAC

TP38

25mVAC

TP39

6.5VAC

TP40

+297VDC

TP41

+297VDC

B+4_TPCB B+4_TPCB

B+4_TPCBB+4_TPCB

B+3_TPCB

B+2_TPCB

B+1_TPCB

-15.6V_RP

+15.6V_RP

+5V

-15.6V_RP

+15.6V_RP

INST_IN

INPUT_V1A

OUTPUT_V1A

INPUT_GAIN

OUTPUT_GAIN

INPUT_V1B

V1B_OUT

V1B_TO_S2A

S2A_OUT

INPUT_V2A

OUTPUT_V2A

S2B_IN S2B_OUT

INPUT_V2B

OUTPUT_V2B

TONE_IN

+15.6V_RVB

-15.6V_RVB

GNDA_1GNDA_2 GNDA_2 GNDA_2 GNDA_3 GNDA_3 GNDA_3 GNDA_4 GNDA_4 GNDA_4 GNDA_4

GNDA_GS1 GNDA_GS3

GNDA_6

GNDA_6 GNDA_6GNDA_GS4 GNDA_GS5 GNDA_8 GNDA_8

GNDA_9

GNDA_9 GNDA_9

GNDA_PA GNDA_PA

GNDA_REV

GNDA_RP GNDA_RP GNDA_RP

GNDA_RP

GNDA_RP

GNDA_PA

GNDA_9

GNDA_4 GNDA_6

GNDA_6 GNDA_8

GNDA_PA

GNDCH_RPGNDCH_RP

GNDCH_LOUT

GNDCH_RP

GNDA_RP

+15.6V_RP

V1A_TO_S2

GNDA_1 GNDA_3 GNDA_2 GNDA_4

GNDA_GS2

GNDA_RP

+15.6V

-15.6V

GNDA_RP

GNDA_RP

GNDA_RP

GNDCH_SPKR

GNDA_3

GNDA_RP

31-MAR-16EC 16-0015

B

B


NOTES:

SEE SHEET 1 ENGR: GIT'LODRAWN: GIT'LO

SHEET: 2 OF 3DATABASE FILE: Z3034S.SCH

7706210000

MAIN PCB ASSY

BASSBREAKER 15

S M M


DATE:

APPROVED BY:

DATE:

CHECKED BY:







R


5678 4 3 2 1

12345678

A

B

C

D D

C

B

A

R E V I S I O N S


D

(schematic)

MUSICAL INSTRUMENTS

Corona, CA U.S.A.

N

L

n

nn

n

POWER

SWITCH

P/N 0036486000

TCO: 139C

BB15 - PRIMARY WIRING & MAINS FUSES FOR INTERNATIONAL SERVICE

TABLE 1:

7706193000

7706193000

7706193000

7706192000

7706192000

7706194000

COLOR - P2COLOR - P12COLOR - P13

BLK

WHT/BLK

WHT/BLK

WHT/BLK

F1A - 0020789000

F1A - 0020789000

F1A - 0020789000

F2A - 0048827000

F2A - 0048827000

F2A - 0048827000

BLK

X

X

X

BLK

WHITE

WHITE

WHITE

BLACK

BLACK

VIOLET

VIOLET

VIOLET

VIOLET

POWER TRANSFORMER

240

230

220

120

110

100

MAIN FUSE - FMIC #LINE VOLTAGE

TCO: 139C

P2

P12

P13

P12

P2

P13

240V220-230V

GRN

GRN

BRN

BRN

RED

REDBLK

WHT

BRN/WHT

D2-4, D8: 1N4006 (X4)

C23-26: 8600pF, 1kV CD-TYPE

TUBE PCB

POWER PCB

TUBE PCBPOWER SUPPLY PCB

change B+ & gnd names on tube or power pcb!!

connect to input jack

FOR REVERB

POWER PCB

CONTROL PCB

REAR PANELPCB

100 -120V: F2AL

220 -240V: F1AL

F4

PRIMARY WIRING - 220V-240V

VIO

WHT/BLK (230V)

BLK (240V)

REDP6

REDP3

GRNP22

GRNP21

P4

P7

P8

PRIMARY WIRING - 100V* - 120V:

P2 FOR 220/240V - SPARE TERMINATION FOR EXTRA WIRE

*(100V: VIO)*

BRN

BRN

BRN/WHT

D5, D9-D11: 1N4006 (X4)

105C105C

4

5

9

V5-C

4

5

9

V4-C

4 5

9

V3-C4

5

V1-B

4

5

V2-B

P13

P12

P6

P3

P22

P21

P4

P7

P8

D3 D4

D8D2

D9

D10

D5 D11

C42

22

450V

C4322450V

C44

22

450V

C49

22

450V

C31 C36

C30 C41

R58

Fp1k

1W

R59

Fp4.7k

1W

R61

Fp4.7k

1W

C50

2200

35V

C32

2200

35V

OUTIN

GND

1

2

3

U6

7815

GND

IN OUT

1

2 3

U5

7915

D7

1N4006

D6

1N4006

WJ18OPEN

WJ23

VIO

WJ22

WHT

-t

RT1

C60-11

C47

.1

250VAC

C46

10

C45

10

R63

Fr22

2W

R64

Fr22

2WOUTIN

GND

1

2

3

U7

7805

C37

10

C35

1

W2

WJ19

BLK

WJ20BLK

WJ21BLK

WJ24RED

WJ25ORG

WJ26YEL

WJ27GRN

R78

100 1/2W

R79

F3

3.15A

F11A

F2

1A

P10 P46

P14 P37

C34

.1

P29

P9

W1

C80

22

450V

P49 P50

P2

TP1

+311VDC

TP2

+298VDC

TP3

+274VDC

TP4

+257VDC

TP5

6.8mVAC

TP6

+21.9VDC

TP7

-22.4VDC

TP8

+15.6VDC

TP9

-15.7VDC

TP10

+5.0VDC

TP11

-12.3VDC

TP12

+12.2VDC

+15.6V

-15.6V

B+1

B+2 B+3 B+4

+5V

GNDA_B4

+15.6V

-15.6V

+15.6V_RP

-15.6V_RPGNDA_RP

+15.6V

-15.6V

+15.6V_RVB

-15.6V_RVB

GNDA_REV

GNDA_PA

C7706210000DATABASE FILE: Z3034S.SCH

06-NOV-15A


PCB ASSEMBLY P/N'S 7706169000 (COMBO) & 7708263000 (HEAD).

4. ALL DIODES ARE 1N4448.

5. THIS SCHEMATIC IS FOR PCB FABRICATION P/N 7706200000 AND

(POWER SUPPLY BYPASS CAPACITORS ARE 20%).

(UNLESS OTHERWISE NOTED)NOTES:

1. ALL RESISTORS IN OHMS, 5%; 1/4W.

3. ALL POLARIZED CAPACITORS IN uF, 20%; 50V MINIMUM.

2. ALL UNPOLARIZED CAPACITORS IN uF, 10% OR BETTER; 50V MINIMUM.

PR3034

SHEET: 1 OF 3

S M M

MAIN PCB ASSY

BASSBREAKER 15

ENGR: GIT'LODRAWN: GIT'LO


DATE:

APPROVED BY:

DATE:

CHECKED BY:







R


5678 4 3 2 1

12345678

A

B

C

D D

C

B

A

R E V I S I O N S


D

(schematic)

MUSICAL INSTRUMENTS

Corona, CA U.S.A.

C2 - CHECK V RATING

H

M

L

C8 - CHECK V RATING

16

8

4

REVERB_SEND

+

-

FEEDBACK

AT P5: REVERB CARD - P/N 0096569000

control pcb - REVERB

rear panel pcb

IMPEDANCE SWITCH PCB

INPUT PCB

INPUT PCB

GAIN CONTROL PCB

GAIN CONTROL PCBCONTROL PCB

TUBE PCB

TUBE PCB

TUBE PCB

TUBE PCB

TUBE PCB

add catch diodes to primary!!

coax

H

M

L

+

-

REAR PANEL PCB

TO 1/2 MUTE SWITCH

POWER SUPPLY PCB - UNDER REVERB CARD

POWER ON/

MUTE FLASHER

CONTROL PANEL

coax

coax

coax coax

coaxcoax

coax

TO 1/2 MUTE SWITCH

BLK

GRN/YLW

GRN

YLW

TO WJ21

RED

WHT

BLKBLKBLK

BRN

BLU

WHTWHT

GRYSPEAKER PCB

7. ALL VOLTAGES MEASURED WITH RESPECT TO CHASSIS GROUND USINGA DVM WITH AT LEAST 1MEG AC INPUT IMPEDANCE & 10MEG DC INPUT

IMPEDANCE. VOLTAGES MAY VARY +/- 20%.

NOMINAL TEST CONDITIONS:


PANEL CONTROL SETTINGS:

GAIN AT 12:00

BRIGHT SWITCH OUT

STRUCTURE CONTROL SWITCH SETTING: LOW

ALL OTHER CONTROLS FULLY CLOCKWISE (MAX) EXCEPT REVERB (MIN)


8. ALL DC VOLTAGE TESTS (TEST POINT DENOTED BY SQUARE BOX AROUND TEST DATA) - NO AC INPUT TO J6

10. FILAMENT VOLTAGE TEST (TEST POINT 5) - NO AC INPUT TO J6; MEASURED ACROSS FILAMENT SECONDARY.

9. ALL AC VOLTAGE TESTS (TEST POINT DENOTED BY CIRCLE AROUND TEST DATA) - INJECT 5mV AC INPUT AT 1kHz TO J6

12. TEST POINT 39 - MUTE SWITCH SET TO DOWN POSITION TO PRODUCE A FLASHING POWER INDICATOR



11. TEST POINT 38 (REVERB LEVEL) - REVERB CONTROL (R128) SET FULLY CLOCKWISE (MAX) FOR THIS TEST ONLY.

6. FOR COMBO: P109 & P110 INSTALLED; JMP1 NOT INSTALLED

FOR HEAD: P109 & P110 NOT INSTALLED; JMP1 INSTALLED

6

13. MAXIMUM OUTPUT TEST CONDITIONS:


PANEL CONTROL SETTINGS: TREBLE AT 12:00

BRIGHT SWITCH OUT

ALL OTHER CONTROLS INCLUDING GAIN: FULLY CLOCKWISE (MAX) EXCEPT REVERB (MIN)




AT TP30 (J1), OBSERVE CLIPPED OUTPUT OF 15W +/- 20% FOR THE FOLLOWING 1kHz INPUT SIGNAL LEVELS (J6) AT THE

THE 3 GAIN STRUCTURE SETTINGS (S1) BELOW:

GAIN STRUCTURE = LOW: INPUT = 15 mVrms

GAIN STRUCTURE = MED: INPUT = 3 mVrms

GAIN STRUCTURE = HIGH: INPUT = 0.3 mVrms

11

12

1313

REAR PANEL PCB

B EC 16-0015 31-MAR-16 S M M

EC 16-0026C 09-MAY-16 S M M

J6

INPUT

R1122.2M

R85

10k

1

2

3

V5-A

12AX7A

6

7

8

V5-B

12AX7A

R68100k

1W

R971.5k

C65

2.2

C56.0022

400V

R115

47k

CW

R123

250k15A

GAIN

C69

470pF

R116

4.7M

S5-A

S5-B

BRIGHT

R84

10k

R107

100k

1W

R822.2k

C58

2.2

C67

.0022

400V

C68

.001

400V

R104

110k

R4

130k

1

2

3

A

S1-A

GAIN STRUCTURE

7

8

9

C

S1-B

GAIN STRUCTURE

R75

270k

R74

100k

1

2

3V4-A

12AX7A

6

7

8

V4-B

12AX7A

R65

100k

1W

R98

1.2kC66

47

C55

.01

400VC54

470pF

R69

470k

R73

68k

R95

470k

R96

68k

R108

100k

1W

R94

1.2kC62

47

C75

470pF

R12147k

C74

.047

400V

C73

.022

400V

CW

R126

250k30A

TREBLE

CW

R124

1M5A

BASS

CW

R125

25k10A

MID

R122

270k

C76

.0068

R111

100k

CW

R127

250k15A

MASTER

C61

.1

400V

1

2

3

V3-A

12AX7A

6

7

8

V3-B

12AX7A

R67

100k

1W

R72100k

1W

R87

1M

R88820

R93

1M

R92

47k

R86

10k

C57

.022

400V

C53

.022

400V

R100

220k

R90

220k

R99

8.2k

R89

8.2k

7

92

3

V1-A

EL84

7

92

3

V2-A

EL84

R70

240 5W

C6047

R80

Fr2702W

R77

Fr270

2W

P25

P27

P23

3

2

1

U1-A

TL072

5

6

7

U1-B

TL072

8

4

U1-C

R24

10k

R19

10k

R25

10k

R26

10k

S

T

R

TS

RS

J3

FX SEND

J4

FX RETURN

C8

22

C11

22

R14

1k

R10

10k

R71k C1

220pF

5%

C4

220pF

5%R8

100k

C5

220pF

5%

C2

220pF

5%

R11

220k

1

2

R161k

R15

1k

R27

220k

3

2

1

U2-A

TL072

5

6

7

U2-B

TL072

8

4

U2-C

R29

22k

R31

22k

R28

270k

R30

270k

R32

47

C19

22pF

5%

C20

22pF

5%

R33

10k

R34

10k

R20

10k

D S

G

Q1

J113

C15

22pF

5%

R21

100k

3

2

1

U3-A

TL0725

6

7

U3-B

TL072

8

4

U3-C

R36

10k

R37

10k

R39

10k

R40

10k

R38

10k

R35

10k

C23

22pF

5%

C24

22pF

5%

C14

.01

C25

.001

C12

.22 C16

.22

R41

3.3k

R44

4.7k

R42

20k

R43

27k

S3-A

CAB EMULATIONS3-B

R45

100k

R13

100k

C10

22

R12

1k

2

1

3

J5

LINE OUT

R17

22k

R18

1k

C6

220pF

5%

C7

220pF

5%D1

C3

.01

5%R9

1M

R6

4.7M

3

2

1

U8-A

TL072

5

6

7

U8-B

TL072

8

4

U8-C

3

2

1

U9-A

TL072

5

6

7

U9-B

TL072

8

4

U9-C

R55

15k

R60

15k

R57

1k

R62

1k

R56

100k

C48

22pF

5%

C52

22pF

5%

C33

22

R54

100k

P5

C40

2.2

C51

2.2

R53

5.1k

R52

5.1k

R51

220k

CW

R128

25kB

REVERB

C29

22pF

5%

R119

47

R120

47

R114

4.7k

R113

4.7k

C70

22pF

5%

P101

P102

P103

P104

C17

.1

C18

.1

C22

.1

C21

.1

C26

.1

C27

.1

C39

.1

C38

.1

C72

.1

C71

.1

C59

.1

250V

R106

10k

R101

300

R102

18k

C63

.047

WJ33

GRY

R1

470kR2

470k

R3

510k

R103

130k

R83

3.3M

R117

3.3M

R91

2.2M

R118

2.2MR66

2.2M

R110

47

R109

47

R71

47

R76

47

R81

47

WJ30GRN

WJ37BLK

WJ31YEL

WJ32

RED

WJ28ORG

WJ29BLK

W3

S4-A

GND LIFT

S4-B

C9.015%

S

T

R

TB

RB

J2

EXTENSION SPEAKER

J1

MAIN SPEAKER

P109

P110

P100

C28

.01

5%

C13

.1

R48

750k

R47

1.5M

R46

4.7k

R50

22k

P105 P107

P108P106

P17 P31

P32 P16

P24 P43P41

P19

P33 P42

P15 P39P40 P20

P26

P34

P30 P18

VCCGND

VCONTROL

THRESH

DISCHRG

RESET

OUTPUT

TRIG

1

2

3

4 5

6

7

8

U4

LM555

C64

.022

400V

WJ15

RED

WJ13

BLACK

R105

1M

1

2

3

4

S2-A 5

6

7

8

S2-B

WJ34BLK

R49

10k

WJ17RED

WJ16BLK

WJ2WHT

WJ3

BLK

P36

P38

P1

P47

P45 P28

P35 P48

P44P11

R5

3.3M

WJ35BLK

WJ36BLK

R23

10k

R22

1M

C77

22pF

5%

C78

47

D12

1N5366B

39V5%

R129

270k

1

2

R13010k

R131

22k

C79

47

R132

100

R133

100

1 2R134

240 5W

C83 47

D13

1N5366B 39V5%

C81

470pF

JMP1

TP13

+158VDC

TP14

+186VDC

TP15

+154VDC

TP16

+157VDC

TP17

+199VDC

TP18

+203VDC

TP19

+66VDC

TP20

+10.2VDC

TP21

+10.3VDC

TP22

5mVAC

TP23

272mVAC

TP24

1.33VAC

TP25

0.87VAC

TP26

1.14VAC

TP27

87mVAC

TP28

1.06VAC

TP29

0.98VAC

TP30

1.98VAC

TP31

87mVAC

TP32

89mVAC TP33

88mVAC

TP34

4mVAC

TP35

6mVAC

TP36

2mVAC

TP37

25mVAC

TP38

25mVAC

TP39

6.5VAC

TP40

+297VDC

TP41

+297VDC

R136

47

C85

.01

B+4_TPCB B+4_TPCB

B+4_TPCBB+4_TPCB

B+3_TPCB

B+2_TPCB

B+1_TPCB

-15.6V_RP

+15.6V_RP

+5V

-15.6V_RP

+15.6V_RP

INST_IN

INPUT_V1A

OUTPUT_V1A

INPUT_GAIN

OUTPUT_GAIN

INPUT_V1B

V1B_OUT

V1B_TO_S2A

S2A_OUT

INPUT_V2A

OUTPUT_V2A

S2B_IN S2B_OUT

INPUT_V2B

OUTPUT_V2B

TONE_IN

+15.6V_RVB

-15.6V_RVB

GNDA_1GNDA_2 GNDA_2 GNDA_2 GNDA_3 GNDA_3 GNDA_3 GNDA_4 GNDA_4 GNDA_4 GNDA_4

GNDA_GS1 GNDA_GS3

GNDA_6

GNDA_6 GNDA_6GNDA_GS4 GNDA_GS5 GNDA_8 GNDA_8

GNDA_9

GNDA_9 GNDA_9

GNDA_PA GNDA_PA

GNDA_REV

GNDA_RP GNDA_RP GNDA_RP

GNDA_RP

GNDA_RP

GNDA_PA

GNDA_9

GNDA_4 GNDA_6

GNDA_6 GNDA_8

GNDA_PA

GNDCH_RP

GNDCH_LOUT

GNDCH_RP

GNDA_RP

+15.6V_RP

V1A_TO_S2

GNDA_1 GNDA_3 GNDA_2 GNDA_4

GNDA_GS2

GNDA_RP

+15.6V

-15.6V

GNDA_RP

GNDA_RP

GNDA_RP

GNDCH_SPKR

GNDA_3

GNDA_RP

08-OCT-15PR3034A S M M

CRELEASE DATE: 06-NOV-15

NOTES:

SEE SHEET 1 ENGR: GIT'LODRAWN: GIT'LO

SHEET: 2 OF 3DATABASE FILE: Z3034S.SCH

7706210000

MAIN PCB ASSY

BASSBREAKER 15


DATE:

APPROVED BY:

DATE:

CHECKED BY:







R


5678 4 3 2 1

12345678

A

B

C

D D

C

B

A

R E V I S I O N S


D

(schematic)

MUSICAL INSTRUMENTS

Corona, CA U.S.A.

N

L

n

nn

n

POWER

SWITCH

P/N 0036486000

TCO: 139C

BB15 - PRIMARY WIRING & MAINS FUSES FOR INTERNATIONAL SERVICE

TABLE 1:

7706193000

7706193000

7706193000

7706192000

7706192000

7706194000

COLOR - P2COLOR - P12COLOR - P13

BLK

WHT/BLK

WHT/BLK

WHT/BLK

F1A - 0020789000

F1A - 0020789000

F1A - 0020789000

F2A - 0048827000

F2A - 0048827000

F2A - 0048827000

BLK

X

X

X

BLK

WHITE

WHITE

WHITE

BLACK

BLACK

VIOLET

VIOLET

VIOLET

VIOLET

POWER TRANSFORMER

240

230

220

120

110

100

MAIN FUSE - FMIC #LINE VOLTAGE

TCO: 139C

P2

P12

P13

P12

P2

P13

240V220-230V

S M M31-MAR-16EC 16-0015B

C EC 16-0026 09-MAY-16 S M M

GRN

GRN

BRN

BRN

RED

REDBLK

WHT

BRN/WHT

D2-4, D8: 1N4006 (X4)

C23-26: 8600pF, 1kV CD-TYPE

TUBE PCB

POWER PCB

TUBE PCBPOWER SUPPLY PCB

change B+ & gnd names on tube or power pcb!!

connect to input jack

FOR REVERB

POWER PCB

CONTROL PCB

REAR PANELPCB

100 -120V: F2AL

220 -240V: F1AL

F4

PRIMARY WIRING - 220V-240V

VIO

WHT/BLK (230V)

BLK (240V)

REDP6

REDP3

GRNP22

GRNP21

P4

P7

P8

PRIMARY WIRING - 100V* - 120V:

P2 FOR 220/240V - SPARE TERMINATION FOR EXTRA WIRE

*(100V: VIO)*

BRN

BRN

BRN/WHT

D5, D9-D11: 1N4006 (X4)

105C105C

4

5

9

V5-C

4

5

9

V4-C

4 5

9

V3-C4

5

V1-B

4

5

V2-B

P13

P12

P6

P3

P22

P21

P4

P7

P8

D3 D4

D8D2

D9

D10

D5 D11

C42

22

450V

C4322450V

C44

22

450V

C49

22

450V

C31 C36

C30 C41

R58

Fp1k

1W

R59

Fp4.7k

1W

R61

Fp4.7k

1W

C50

2200

35V

C32

2200

35V

OUTIN

GND

1

2

3

U6

7815

GND

IN OUT

1

2 3

U5

7915

D7

1N4006

D6

1N4006

WJ18OPEN

WJ23

VIO

WJ22

WHT

-t

RT1

C60-11

C47

.1

250VAC

C46

10

C45

10

R63

Fr22

2W

R64

Fr22

2WOUTIN

GND

1

2

3

U7

7805

C37

10

C35

1

W2

WJ19

BLK

WJ20BLK

WJ21BLK

WJ24RED

WJ25ORG

WJ26YEL

WJ27GRN

R78

100 1/2W

R79

F3

3.15A

F11A

F2

1A

P10 P46

P14 P37

C34

.1

P29

P9

W1

C80

22

450V

P49 P50

P2

TP1

+311VDC

TP2

+298VDC

TP3

+274VDC

TP4

+257VDC

TP5

6.8mVAC

TP6

+21.9VDC

TP7

-22.4VDC

TP8

+15.6VDC

TP9

-15.7VDC

TP10

+5.0VDC

TP11

-12.3VDC

TP12

+12.2VDC

+15.6V

-15.6V

B+1

B+2 B+3 B+4

+5V

GNDA_B4

+15.6V

-15.6V

+15.6V_RP

-15.6V_RPGNDA_RP

+15.6V

-15.6V

+15.6V_RVB

-15.6V_RVB

GNDA_REV

GNDA_PA

Documents

Service Manual Template - Schematic Hell