Apple M8536, Inverter cap replacement question.

[Xandros]

Hey. I've revisited a 23" Cinema HD Display I had issues with and have narrowed down the problem to the inverter board. It's essentially a 2 seconds to black issue as detailed in the sticky thread, though I've followed several of the tests in that and not come up with any obvious issues.

The only thing I haven't been able to test are the two caps on the board, as I don't have any of the equipment to do so. The two caps however, are Teapo:




I've been lead to believe from what I've read on here that Teapo's are prone to going bad. So I figure rather than buying equipment to test them I might just as well buy replacement caps. I can't really find a suitable like for like replacement but there are a few Rubycon and Panasonic caps I've come across that are the same voltages/uF rating but have higher ripple and lower impedance than the original caps. Will they do?

The original caps are both Teapo SC series 105 degrees, 35v, 220uF, ripple of 800 with impedance of 0.069 (as detailed on page 115 in this PDF spec sheet from Teapo).

Replacements I've found include a Panasonic FM series, same voltage and other spec but has a ripple of 1290 and impedance of 0.038. Will that be a good replacement? Someone on here told me ages ago that higher ripple and lower impedance is actually preferable for replacements.

Cheers!

[budm]

Re: Apple M8536, Inverter cap replacement question.

I use FM for all my repair works, that cap will be fine, it has better rating than the TEAPO. If repalcing caps still not fixing the problem then you will have to do more in-depth troubleshooting.

[Xandros]

Re: Apple M8536, Inverter cap replacement question.

Yes, I'm hoping it's one or the other or both of the caps are causing the issue. Knowing my luck it probably isn't though. Anyway thanks!