JBL P12SW service manual Service Bulletin, E250P subwoofer

E250P subwoofer

Service bulletin # JBL2005-01 December 2005 To: All JBL Service Centers

Model: E150P, E250P Subwoofers

Subject: “Chirp” Noise on Power-Up

Service Bulletin

Warranty labor rate: MINOR repair

In the event you receive an E150P or E250P with the complaint: “the subwoofer make a slight “chirp” noise when it becomes active from the stand-by mode”, perform the following modification.

Synopsis: Change C65 PE capacitor from 470µf to 47µf.

1)Remove the amplifer from the enclosure.

2)Remove the cover.

3)Change C65 Electrolytic capacitor from 470µf,16V to 47µf,16V, JBL part# 034-470515-200. Observe polarity.

4)Replace cover, replace amplifier in enclosure, test subwoofer.

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