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JBL Incorporated
250 Crossways Park Dr. Woodbury, New York 11797
Service Bulletin
Service Bulletin JBL2001-05 - June 2001
This is considered a Minor repair
To:
All JBL Service Centers
Models: PB12
Subject: Popping Every Few Seconds During Play
In the event you receive a PB12 subwoofer with the complaint: “The subwoofer “thumps” or “pops”
every few seconds of play”, follow the procedure below:
Probable Cause:
Inductor L1 (220uH) may be damaged.
Check and Replace L1 if necessary:
1) Set the unit on a padded surface and remove all external cables.
2) On the amplifier faceplate, remove the (10) Phillips mounting screws around the perimeter.
3) Remove the amplifier assembly from the enclosure. If the amp is supported correctly, no other
connectors need to be unplugged.
4) Locate Inductor L1 on the main PCB. If the windings appear charred or burnt, it must be replaced.
5) Order JBL part# 80121 and replace L1.
6) Replace the amplifier assembly back into the cabinet; replace the screws.
7) Test the unit and confirm the original problem has been corrected.
Содержание PowerBass PB12
Страница 3: ...PB12 3 SAFETY INFORMATION ...
Страница 4: ...PB12 4 BASIC SPECIFICATIONS PB12 Subwoofer ...
Страница 5: ...PB12 5 DETAILED SPECIFICATIONS PB12 Subwoofer ...
Страница 20: ...PB12 20 Testing Procedure ...
Страница 21: ...PB12 21 Integrated Circuit Diagrams Cont ...
Страница 22: ...PB12 22 Integrated Circuit Diagrams Cont ...
Страница 23: ...PB12 23 PB12 Electrical Parts List PB12 POWER AMP PCB Version 6 3 7 0 Part Designator Description ...
Страница 26: ...PB12 26 PB12 Electrical Parts List Cont PB12 PREAMP section of PCB Version 6 3 7 0 Part Designator Description ...
Страница 27: ...PB12 27 PB12 Electrical Parts List Cont PB12 PREAMP section of PCB Version 6 3 7 0 Part Designator Description ...
Страница 32: ...PB12 32 PB12 PCB s version 6 3 ...
Страница 33: ...PB12 33 PCB s version 6 3 Cont ...
Страница 34: ...PB12 34 PCB s version 6 3 Cont ...
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