Yamaha Bass Amplifier, F-20B service manual Contents

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BASS AMPLIFIER

BASS AMPLIFIER

SERVICE MANUAL

This document is printed on chlorine free (ECF) paper with soy ink.

GA 011592

20010720-17800

CONTENTS

 

SPECIFICATIONS

3

PANEL LAYOUT

3

CIRCUIT BOARD LAYOUT

4

BLOCK DIAGRAM

4

DISASSEMBLY PROCEDURE

5

CIRCUIT BOARDS

7

IC BLOCK DIAGRAM

8

INSPECTIONS

8

PARTS LIST

 

OVERALL CIRCUIT DIAGRAM

 

HAMAMATSU, JAPAN

1.507K-033 K SERVICE MANUALPrinted in Japan 2001.08

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Contents BASS AMPLIFIER CONTENTSWARNING CHEMICAL CONTENT NOTICE F-20BIMPORTANT NOTICE IMPORTANT NOTICE FOR THE UNITED KINGDOMPANEL LAYOUT SPECIFICATIONSF-20B CIRCUIT BOARD LAYOUT BLOCK DIAGRAMPOWER AMP POWER TRANSFORMER1.Pre-MainUnit Time required about 2 min DISASSEMBLY PROCEDURE2.Speaker Time required about 2 min F-20BF-20B 4.MAIN 2/2 Circuit Board 5.Power Transformer Time required about 4 minTime required about 3 min F-20B CIRCUIT BOARDS2.Power supply IC BLOCK DIAGRAM3.Inspection procedure INSPECTIONSPARTS LIST CONTENSBASS AMPLIFIER F-20B10 Overall Cabinet Assembly OVERALL ASSEMBLYF-20B 20 Pre-MainUnitDESCRIPTION F-20BREMARKS New partsPRE-MAINUNIT V 6 9 5 4 8 0 0 Chassis F-20BF-20B ELECTRICAL PARTSHF456330 F-20BABCDEFG P.1 OVERALL CIRCUIT DIAGRAMF-20B 5 F-20B
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