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PowerBass Series PB10 Subwoofer TM SERVICE MANUAL JBL Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 REV 0 7/00 PB10 TABLE OF CONTENTS Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Basic Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Detailed Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Controls and their Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Test Setup and Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Exploded and Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Amplifier Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Amplifier Faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Integrated Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 2 PB10 SAFETY INFORMATION 3 PB10 BASIC SPECIFICATIONS PB10 Subwoofer 4 PB10 DETAILED SPECIFICATIONS PB10 Subwoofer 5 PB10 PB10 Subwoofer Controls and their Function 1. Power - These lights will be red when the unit is plugged in and not receiving a signal; when the PB10 receives a signal, the lights will cycle to GREEN. If no signal is received after 10-15 minutes the lights will cycle back to RED (standby) until a signal is present again. Level Control - The subwoofer Level Control, PB10, (located on the rear panel) adjusts the volume of the subwoofer relative to the rest of the system. LFE/Normal Switch - Ordinarily placed in the Normal position - but switch to LFE when playing Dolby DigitaL, DTS or other digital surround modes - see page 9. Phase Switch - Changes the subwoofer's output to be in phase or 180 degrees out of phase with the program material. Crossover Frequency - Sets the highest frequency the subwoofer will reproduce. Line Input - Main Input connection to subwoofer (preferred). Speaker In Jacks - Main Input connection to subwoofer when