Re: JBL LSR25P amplifier chip overheating



A clean switch is good but could a dirty one play a role in this problem? So do I need to pull this chip again to do this testing?...

I have a set of JBL LSR25P speakers in which one had a popping noise about once every 2-3 seconds. A local tech (who only worked on pro equipment) bet without looking it was a bad cap. So I replaced all the caps and the problem persisted. The board has 3 LM3886 amp chips. 2 of them appear to be a push-pull setup and drive the woofer. The other one drives the tweeter. I powered it up and noticed that the LM3886 that ran the tweeter was extremely hot. The other two were room temperature. The datasheet stated that it has thermal overload protection and will shut down at a certain point and then restart....

Re: phillips 32pfl4507/f7 squeal like a pig



I just had this exact problem and those caps were bad for me as well. Curious how you found which ones were bad. I checked them on board with a cheap dvm with cap mode and they showed OL while the others gave me a value. Popped them off and the TV works. Looks like they are filter caps so I assume that's why it works without them. Gotta order new ones now....