Re: LG home theater in a box - film cap replacement



Could be: there are a few SMT devices indicative of an RC chain. I'm not at home until midnight-ish, so I can't use my DMM (for continuity testing), a pen, and scrap paper to flesh out a diagram at the moment....

I've had a LG home theater in a box (DVD player with integrated 5.1 receiver board) release magic smoke. Upon opening, I found that the film cap which (it looks like) decouples the + and - for the 4 ohm subwoofer channel had fried. While the 6 ohm channels used 0.47 uF 5% (474J) 63 V caps, the burnt one was also 0.47 uF 5% 63 V.

Which value should the cap for the 4 ohm channel be boosted to (capacitance and voltage) so that the probability of magic smoke is lowered?

Yes, this isn't an electrolytic, but a failed cap is a failed cap.

Re: New Members - please post your introductions here

Greetings. I'm a programming wizard (C / C++) who spends most of his spare time hacking electronics - pliers, flat screwdriver, and a dremel are things that I couldn't live without. My soldering skills are pretty good for through-hole, and somewhat amateur for SMT (2-pad leaded only at the moment - no hot-air rework station for leadless and IC packages). BGA skills are non-existent, so no, I can't un-RRoD xbox 360's :P
I also repurpose old computer power supplies as benchtop 3.3/5/12v PSUs.

My reason for...