JBL PB10, PB12 Technical manual

TECH TIPS

Troubleshooting tips and solutions to common service problems

For models: PB10, PB12 (Revision 2) * TIP# JBLTT2003-04

Subject: Replacing MOSFETS Q18, Q22

In the event you need to replace MOSFET transistors Q18 or Q22 as part of a repair, it is important to use

ONLY the JBL part# FE106401110 or only the brands: International Rectifier, or Fairchild.

Replace both

Do NOT mix & match these components from different manufacturers, or batches. They should be

identical.

Q18 and Q22 MOSFET’s in the circuit, even if only one seems to be damaged.

* Late version PB10 or PB12 subwoofers (Revision 2 in the service manual) can be identified by:

• 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

JBL Incorporated Inc. 250 Crossways Park Dr. Woodbury, New York 11797