Thanks to all who have posted info on capacitor replacement with pictures of the PSU layout. As a result one restored TF5800 back in service.
Following intermittent faults over the last months, my 2008 TF5800 finally stopped feeding video to SCART two weeks ago. A check of the power rails showed 4.66V instead of 5V and all higher rails considerably higher [14.5 for 12V, 35.8V for 30V etc].
As recommended, I replaced all 18 caps. All supply rails are now normal.
The Toppy still surprised me by stalling a couple of times. I then checked U20 but 1.5V was fine. A Factory Reset and rescan seems to have cured the stalling problem, fingers crossed, so hopefully the high V's have not damaged any chips.
A check of all old caps on an ESR meter shows two completely failed (>40 ohm ESR and no capacity able to be measured) and four with >30% down on capacity. All 18 have ESRs 5 to 10 times higher than the new ones replacing them.
Again thanks to all for the clear descriptions and excellent content at this site.
I'm looking forward to another nine years++ of reliable operation if SD Freewiew and I can last that long .
History - PSU date code May 2007. Only one cap changed before the present problem. SWare was changed to 5.14.09+ in Dec 2009 and a 500GB IDE hard disk in May 2012. otherwise no TAPs, no extras.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum