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Fender Bassman 300 Service Manual
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Fender Bassman 300 Service Manual

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Fender Musical Instruments Corp. 8860 East Chaparral Road Suite 100 Scottsdale, AZ 85250
BASSMAN 300
p/n 021-3302-010 (120V)
CONTENTS:
Notices
PCB assembly
Cabinet assembly
Footswitch assembly
Schematics
Service diagrams

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Summary of Contents for Fender Bassman 300

  • Page 1: Table Of Contents

    021-3302-010 (120V) SERVICE MANUAL CONTENTS: Notices Specifications Circuit description Parts lists: PCB assembly Chassis assembly Cabinet assembly End item Footswitch assembly Footswitch PCB Schematics Service diagrams Fender Musical Instruments Corp. 8860 East Chaparral Road Suite 100 Scottsdale, AZ 85250...

  • Page 2: Service Manual

    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.

  • Page 3: Specifications

    BASSMAN 300 (This is the model name for warranty claims) SPECIFICATIONS Product Release No.: PR 512 (This is not a model number) Part Number: 120V Version : 21-3302010 240V Aust : 21-3332010 230V UK : 21-3342010 230V : 21-3362010 100V JPN...

  • Page 4: Circuit Description

    BASSMAN 300 (This is the model name for warranty claims) CIRCUIT DESCRIPTION Preamp The preamp section employs two 12AX7 tubes. Channel one (V1) is fairly conventional, while channel two (V2) uses a second tube with additional op-amp gain (U2B) to provide a 60's style overdrive sound. The op-amp is used as straight gain and is never allowed to become non-linear.
  • Page 5 BASSMAN 300 (This is the model name for warranty claims) CIRCUIT DESCRIPTION (CONT) Output section On the top side of the chassis, at the rear of each pair (total = 3) of output tubes, is an LED and a fuse. The LED glows green when the associated pair of tubes is operating properly, and glows red if a tube failure has caused the related fuse to blow.

  • Page 6: Parts List

    BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY PART # DESCRIPTION REFERENCE DESIGNATION 054360 CAP AE AX 22uF 450V 20% 105C C162 C166 C170 C176...
  • Page 7 BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PARTS LIST PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 027283 CAP MPF .33uF 63V 10% C43-44 027286 CAP MPF .47uF 63V 10%...
  • Page 8 BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 041808 HEADER 8 CKTx.1" LO P1B P2B 041825 HEADER 8 PIN VERT.
  • Page 9 BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 024981 RES CF 1/4W 5% 10k LL R1 R5 R8 R15 R18 R20-21 R25 R28 R33...
  • Page 10 BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 024977 RES CF 1/4W 5% 4.7k LL R47 R52 R142 R216 R235 R339 R344...
  • Page 11 BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY PRINTED CIRCUIT BOARD ASSEMBLY (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 048451 BUTTON PUSH OFF WHITE AT S1-9 026411 THERMISTOR 2.5 OHM 8A C30-19...

  • Page 12: Chassis Assembly

    (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY CHASSIS ASSEMBLY PART # DESCRIPTION REFERENCE DESIGNATION 057678 CHASSIS BASSMAN 300 053639 PCB ASSY SUNN 300T 050853 XFMR PWR 300W 120V DOMESTIC UNITS 053942 XFMR PWR 300W 100/230/240V...

  • Page 13: End Item

    END ITEM PART # DESCRIPTION REFERENCE DESIGNATION 0057738000 CHASSIS ASSY BASSMAN 300 120V 0057741000 CHASSIS ASSY BASSMAN 300 240V AUST 00577424000 CHASSIS ASSY BASSMAN 300 220V ROK 0057739000 CHASSIS ASSY BASSMAN 300 230V/230V UK 0057737000 CHASSIS ASSY BASSMAN 300 100V...
  • Page 14 PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY END ITEM (CONT) PART # DESCRIPTION REFERENCE DESIGNATION 0057682000 GRILLE BASSMAN 300 0053598000 GRILLE REAR SUNN 300T 0050311000 NUT 2-56 NYLON INSERT 2CNME-Z @ NAMEPLATE 0036112000 SCRW SMAB 6x1-1/4 OHP BLX w/WS...

  • Page 15: Footswitch Pcb

    BASSMAN 300 (This is the model name for warranty claims) PARTS LIST NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY FOOTSWITCH END ITEM PART # DESCRIPTION REFERENCE DESIGNATION 053897 PCB ASSY FTSW 3 BTN SUNN BASS 057746 PLATE FTSW 3 BTN BASSMAN...