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| Mac SE or SE/30 Sony PSU recap |
Posted by: amedeo_68k on 2022-07-26 05:21:59
Hi, I have just finished recapping of a Sony psu inside Mac SE/30, but before powering on the PSU I would like to triple check the cap polarity, does anyone have the PSU picture with polarities ?
thank you
Amedeo |
Posted by: robin-fo on 2022-07-26 08:50:34
Used this with one of mine.. No guarantee for correctness 😉 |
Posted by: amedeo_68k on 2022-07-26 15:23:08
Thank you so much, It is correct ! |
Posted by: amedeo_68k on 2022-08-27 10:46:00
Hi again, PSU has been recapped, machine works fine, but.... I read low voltages on +12V and -12V, it is something about +10V and -9V. (Testing PSU without load), ADJ is set to Max... Ideas ? |
Posted by: joshc on 2022-09-01 20:11:36
There is a pot you can adjust on the board, to adjust the voltages. Turn this slowly and re-test. This is exactly why a lot of people ATX convert these now instead of trying to get the old PSU working again, other components might need replacement if voltages are still low. |
Posted by: amedeo_68k on 2022-09-01 22:28:39
Yes. But it is already set to max |
Posted by: Skate323k137 on 2022-09-02 03:40:17
Hi again, PSU has been recapped, machine works fine, but.... I read low voltages on +12V and -12V, it is something about +10V and -9V. (Testing PSU without load), ADJ is set to Max... Ideas ? Never test PSUs without a load, this is a ground rule for arcade repair, and usually good for retro PCs too. A regulated supply might read right with no load but most power supplies need a minimum load on them to output proper voltage and be adjusted. |
Posted by: cheesestraws on 2022-09-02 03:54:07
Yeah don't test PSUs without a load, you won't get anything resembling reality. |
Posted by: joshc on 2022-09-02 03:55:28
I missed that bit! Yeah, the SE/30 PSU won't work properly without load, and this is the case with most computer power supplies. |
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