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IIsi Sony PSU cap list
Posted by: PB145B on 2018-05-24 11:22:11 Anyone have a FULL cap list for the IIsi Sony PSU? The one I found (on maccaps.com) seemed to be missing some (it only showed like 10 and I counted at least about 13). I want to replace ALL caps in my PSU. Worst case, I can disassemble the PSU and get the values, but a list would make things a little easier.
Posted by: AlpineRaven on 2018-05-24 20:19:24 those PSUs are terrible.... Cheers AP
Posted by: PB145B on 2018-05-24 23:05:20 those PSUs are terrible.... Cheers AP Lol. I just ended up taking apart my PSU to get the values. Once I actually remove the caps and can see the markings on the board better, I will make a full cap list for this PSU.
Posted by: bibilit on 2018-05-25 00:31:06 Done one yersterday, the ones that goes bad are the 2200 µf /16 volt (4 of them) the 220 µf and both smd in the small board. The ones in the primary side are ok most of the time. And yes those are bad leakers.
Posted by: PB145B on 2018-05-25 10:57:01 Done one yersterday, the ones that goes bad are the 2200 µf /16 volt (4 of them) the 220 µf and both smd in the small board. The ones in the primary side are ok most of the time. And yes those are bad leakers. Yeah, the ones in the primary side do look fine but I think I’m gonna just go ahead and change them for good measure.
Posted by: PB145B on 2018-05-26 20:18:28 Got the floppy drive restored. All the grease was dry and the mechanism was very stiff. It was also full of dust! Tested it on my Performa 410 and it works great! View attachment 23418 View attachment 23419 View attachment 23420
Posted by: PB145B on 2018-05-26 20:33:12 Got the floppy drive restored. All the grease was dry and the mechanism was very stiff. It was also full of dust! Tested it on my Performa 410 and it works great! Oops didn’t mean to post that here.
Posted by: bibilit on 2018-05-30 00:08:56 replaced capacitors on one of those, the PSU works, but won't turn off (try but reboot the IIsi) any idea ?
Posted by: CC_333 on 2018-05-30 20:23:00 Check the power button? c
Posted by: bibilit on 2018-05-30 23:20:07 Check the power button? No problem on this side, another PSU works ok. Think is related to soft-power
Posted by: PB145B on 2018-05-31 16:10:49 I’d check this board for cap goo and broken traces.
Posted by: saybur on 2018-05-31 20:48:46 That controller board is the most problematic part of the Sony PSUs in these models, in my experience - I've got one that even after recapping and cleaning it does the whole "shut down, then boot right back up again" that you're describing. That one looked just like yours, nice and gunky, with some pretty bad trace rotting. On the plus side, the PSU itself works fine - it seems to just affect the power-down circuitry.
Posted by: bibilit on 2018-06-01 00:59:11 I agree, mine was pretty clean, far better that the one in the picture, but some goo can still be present.
Posted by: PB145B on 2018-06-01 01:15:43 That picture I posted isn’t mine, it’s from maccaps.com. Mine actually looked a little bit worse that the one in that picture!
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