Recent content by Plasticoat

Is power supply tested and ok?

You are right! Your PSU needs your help now.

Ok, been there, someone helped me, I’m passing it on.. https://68kmla.org/bb/index.php?threads/any-one-willing-to-help-isolate-the-low-esr-on-my-map.46744/#post-522979 Also do not forget to replace the safety cap, I’m at work and do not have the info to hand, I may be able to help later 👍🏻

What you got in there? Dyna or Aztec? Love doing power supplies, however it’s not straight forward, caps as I am learning are not always a straight swap, some may have to be a low ESR. Anyway, you have a working PSU which is a good start, generally as a reference it’s the same PSU as a PowerPC...

Ok, a small update, the supplier from eBay was excellent, the chips I ordered came within 3 days. have replaced 2 suspect chips , with 100% success, both boards now have sound from speaker and headphone jack.

Just wanted to say thanks, I have ordered x 5 from eBay , I’ll update this thread when they arrive and have changed out the chips on the boards. I see many threads across the interweb about no sound from from speakers on LC 475’s but sound only from the headphone port, Let’s see if we can...

Hi all, not strictly a LC Performa thread, but is there a source for these chips to replace failing ones? These were used on LC’s through to later power PC’s , A link would be great If possible thanks

Knew it, thanks for the confirmation 👍🏻

Hi. I’m unsure on this safety cap replacement, have i ordered x when it should be y? I do not want to kill myself or anybody else 🤔 https://www.mouser.co.uk/ProductDetail/710-890324024002CS

Thanks, I really appreciate your help 👍

Would really appreciate this from someone desperately trying to avoid future probs, many thanks

If you have a map of the PSU’ s sure would appreciate a share

If the Mac is booting into firmware, it’s half good! If the disk is correct it should give you a series of options, 1,2,3,4 etc if your not getting those options to install remove or patch then I’d say the disk you are using is dodgy, try another installer. With good firmware. I cannot help...

Thank you for the info, I have checked other posts over the internet, and I will go ahead and replace with nothing other than quality radials. I will however, check this thread if there is any more info forthcoming . Thanks again Phipli

Hi all, I’m looking for some info on The Dyna Comp PSU, namely any Low ESR caps on the board, I have mapped and image’d, the PSU caps, but could do with the heads up. Is there a device for the future that can distinguish between low esr caps and standard radials. Thanks for looking and any...