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Fender Bassman 400, Service Manual

The Fender Bassman 400 is a powerful bass amplifier that delivers bold and rich tones. Unlocking its full potential is easy with the comprehensive user manual. Download your free copy of the manual from our website to explore all the features and settings of this exceptional bass amplifier.

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BASSMAN 400/400H

p/n 022-4505-000 (120V)

SERVICE MANUAL

CONTENTS:

Notices

Specifications

Service notes

Parts lists:

    PCB assy - Preamp

    PCB assy - Pwr amp

    Chassis assembly

    Cabinet assembly

    End item

Schematics/drawings

Fender Musical Instruments Corp.

  

7975 North Hayden Road Scottsdale, AZ 85258

Summary of Contents for Bassman 400

Page 1: ...ERVICE MANUAL CONTENTS Notices Specifications Service notes Parts lists PCB assy Preamp PCB assy Pwr amp Chassis assembly Cabinet assembly End item Schematics drawings Fender Musical Instruments Corp 7975 North Hayden Road Scottsdale AZ 85258 ...

Page 2: ...arked 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...

Page 3: ...uency 25Hz to 150Hz 3 Band Switchable Low level 15dB low freq setting Mid frequency 140Hz to 1 6kHz Mid level 15 dB Mid frequency setting High frequency 1 4kHz to 8kHz High level 15dB High frequency setting Room balance 10dB crossover frequency 350Hz Effects Loop Send impedance 1kΩ Return impedance 22kΩ Nominal level 4dbu adjustable with level control Speakers Bassman 400 Two Eminence 8 Ω 10 woofe...

Page 4: ... C6 C10 C18 C23 C30 C57 1 0039256001 CAP CA 68pF 100V LL C39 2 0039258001 CAP CA 180pF 100V LL C1 C25 1 0039261001 CAP CA 330pF 100V LL C56 1 0039262001 CAP CA 680pF 50V LL C32 16 0034788003 CAP CR 1uF 50V 20 2 LS C61 76 2 0027255003 CAP MPF 001uF 100V 10 C16 C37 2 0027257003 CAP MPF 0022uF 100V 10 C17 C40 3 0027259003 CAP MPF 0033uF 100V 10 C13 C29 C35 1 0027260003 CAP MPF 0039uF 100V 10 C55 1 00...

Page 5: ...8 33 0024981001 RES CF 1 4W 5 10k LL R3 R5 R10 R14 R20 21 R31 R46 47 R49 R51 R57 58 R64 65 R71 73 R79 81 R89 R98 R104 107 R118 R121 R125 126 R141 142 2 0024983001 RES CF 1 4W 5 12k LL R23 R132 2 0029006001 RES CF 1 4W 5 20k LL R82 83 7 0024987001 RES CF 1 4W 5 22k LL R109 R114 117 R123 R128 6 0024988001 RES CF 1 4W 5 27k LL R15 R19 R24 R28 R134 135 5 0024989001 RES CF 1 4W 5 33k LL R22 R75 R84 R96...

Page 6: ...N 1N5231B 5 1V 5 LL D20 21 3 0031635001 DIODE ZEN 1N5240B 10V 5 LL D27 29 10 0064089001 DIODE 1N4003 LL D24 25 D100 103 D108 111 2 0054210001 DIODE BAT85 D14 15 9 0025802000 FSTN TAB MALE 250x 032 PCB MT P1 9 2 0025996000 FUSE CLIP PCB 250 5MM FUSE F1 1 0027408000 HDR 1 CTR 2 CKT SQ PIN P10 2 0027416000 HDR 1 CTR 8 CKT SQ PIN P100 101 2 0050849000 HEATSINK PCB LEVEL U101 U102 2 0039420000 SCRW M 4...

Page 7: ...7 1 0027627001 RES FILM 1W 5 10ohm LL R45 3 0037354001 RES FILM 1W 5 4 7k LL R18 R23 R102 3 0027628001 RES MOX 2W 5 47ohm LL R43 44 R100 1 0041269001 RES MOX 2W 5 1 2k LL R101 6 0050814000 RES WW 5W 10 15ohm R37 42 2 0028091000 SWITCH PUSH SLFLK SHORT STROKE S201 202 2 0048451000 BUTTON PUSH OFF WHITE S201 202 1 0026411000 THERMISTOR 2 5 ohm 8A C30 19 RT1 1 0051418003 THERMAL SENSOR PTC 100 DEG C ...

Page 8: ...0051404000 STANDOFF NYLON BLK 375 PRE AMP PCB 10 0031073000 STANDOFF 6 32x3 8 RND AL PWR AMP PCB 4 0033051000 SCRW M 6 32x1 2 PHP ZI LW HEATSINK STND 16 0014999000 SCRW M 6 32x1 4 PHP BLX STANDOFFS 2 0051155000 SCRW SMB 4X3 8 PHP BLX XLR JACK 1 0053986000 KNOB ROTARY SS W CHR INSERT REAR PANEL 13 0055775000 KNOB ROTARY W CH INS BASSMAN 1 0039236000 SWITCH ROCKER DPST PSEUDO IEC 100 120V 1 00405820...

Page 9: ...RILLE 1 0022491000 CLAMP CABLE NYL SCRW MNT 5 16 SPKR CABLE 1 0029828000 SCRW PB 8x3 4 PHP ZI CLAMP 1 0022327000 WSHR FLAT 8x7 16 NI CLAMP 4 0033380000 SCRW SMAB 8x1 THP BLX HORN 8 0026577000 SCRW M 10 32X1 PHP BLX SPEAKERS 4 0050312000 SCRW 2 56X3 8 FHP NI LOGO 4 0050311000 NUT 2 56 NYLON INSERT 2CNME Z LOGO 8 0029527000 WSHR FNSH 8 5 8 FLNGD BLX WX CHASSIS 8 0036199000 SCRW M 8 32x1 3 16 OHP BLX...

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