C7 capacitor blew in my LC. What does it affect?

[geokov]

Hello all, I am new to this forum and also to vintage Mac ownership. I purchased a "re-capped" LC for a song but upon opening it I discovered that capacitor C7 had already blown up (it was soldered in upside down). I had a look at the schematics for the LC and I think I have narrowed it down to something to do with the sound but everything with the sound is still functioning as it should. The only thing I haven't been able to check is the microphone jack.

If someone with more experience could let me know the purpose of the C7 capacitor I would be very grateful.

It looks like I may have to re-cap the re-cap. Should I purchase tantalum capacitors or electrolytic capacitors? There seems to be some debate on the subject.

Cheers from Canada

 

[Nixontheknight]

Hello all, I am new to this forum and also to vintage Mac ownership. I purchased a "re-capped" LC for a song but upon opening it I discovered that capacitor C7 had already blown up (it was soldered in upside down). I had a look at the schematics for the LC and I think I have narrowed it down to something to do with the sound but everything with the sound is still functioning as it should. The only thing I haven't been able to check is the microphone jack.

If someone with more experience could let me know the purpose of the C7 capacitor I would be very grateful.

It looks like I may have to re-cap the re-cap. Should I purchase tantalum capacitors or electrolytic capacitors? There seems to be some debate on the subject.

Cheers from Canada

Tantalum capacitors are good for longevity, the Quadra 700 used them for all its capacitors, and lots of them are still going strong today. I may be biased because that's what my LC III was recapped with, but as I said, longevity and in some cases they may never need to be replaced again unless you're astronomically unlucky