Table Of Contents - JBL PowerBass PB12 Service Manual

PB12
Safety Information ....................................................................3
Basic Specifications ..................................................................4
Detailed Specifications ..............................................................5
Controls and their Function..........................................................6
Connections ............................................................................7
Operation ..............................................................................10
Troubleshooting.......................................................................11
Test Setup and Procedure .........................................................12
Service Bulletin JBL 2001-03 .....................................................13
Service Bulletin JBL 2001-04 .....................................................14
Service Bulletin JBL 2001-05 .....................................................17
Service Bulletin JBL 2001-07 .....................................................18
Service Bulletin JBL 2001-08 .....................................................19
Tech Tip JBLTT2003-04............................................................20
Exploded View/Packaging..........................................................21
Amplifier Exploded View ...........................................................22
Amplifier Faceplate/Access........................................................23
Integrated Circuit Diagrams.......................................................24
Testing Procedures................. ................................................26
Block Diagram Revision 2.........................................................32
Electrical Parts List (PCB version 6.3 - 7.0)................................. 33
Electrical Parts List (PCB version 7.2) .........................................37
Electrical Parts List Revision 2....................................................41
Printed Circuit Boards (PCB version 6.3).......................................44
Printed Circuit Boards (PCB version 6.4).......................................47
Printed Circuit Boards (PCB version 7.2)... ..................................48
Schematics Version 1
Schematics Version 2...............................................................56
PB12 - DIFFERENCES IN REVISION 1 AND REVISION 2
REVISION 1
Amplifier faceplate says "Made in Canada"
Amplifier serial number starts with "AM"
Black (or silver) potted, non-serviceable output module
BOTH VERSIONS OF THESE AMPLIFIERS ARE NOT CONSIDERED INTERCHANGEABLE; THEY ARE
NOT A DROP-IN REPLACEMENT IN THE CABINET OF THE OTHER VERSION.

TABLE OF CONTENTS

Preamp (PCB version 6.3)................................. .................51
Power Amp (PCB version 6.0 -6.3)........ ...............................52
Power Amp (PCB version 7.0)............... ..............................53
Preamp (PCB version 7.2)................................. .................54
Power Amp (PCB version 7.2).................................. ...... ....55
REVISION 2
Amplifier serial number starts with "HA"
Output transistors in the open, on a large black heatsink
Large plastic cup enclosing the rear of the amp assembly
Main PCB, bottom, solder-side contains all SMD devices
"Made in Mexico" label on outer part of cabinet
2