Digest for sci.electronics.repair@googlegroups.com - 3 updates in 3 topics

Cursitor Doom <curd@notformail.com>: Jul 16 04:03PM

On Sat, 16 Jul 2016 11:09:04 +0000, Bruce Esquibel wrote:

> I know the 317 is probably the most common regulator used but just isn't
> the best choice in some cases, like this one. Cost I'd guess is the best
> reason to use them.
 
Yeah, I've replaced this one with the 60V variant just to be on the safe
side as my first choice was too near the supply rail for comfort. I'd
obviously partly damaged the old one with my prodding around under power
and the cap probably partially discharged through it.
So the 10 shilling postal order and box of After Eight mints goes to....
Jeff Liebermann! :-)
jurb6006@gmail.com: Jul 16 07:08AM -0700

>"like one case I saw the tuning gang in a Quad FM3 tuner. "
 
These days I apply it with a syringe right to the contacts. If the blades are really dusty I use stuff that is completely residue free, and I DO test it.
etpm@whidbey.com: Jul 15 11:12AM -0700

>> card too?
>> Eric
 
>Since you've already ordered a new power supply I wouldn't go any further until that's installed. If the supply is sluggish or inop when cold, it most likely has high esr electrolytics. Even when warm enough to allow function, they still allow sag and ripple on the outputs which can upset whatever is connected to it. Good chance everything gets fixed with the new supply.
Thanks everyone for the replies. It seems weird to me that the video
output fails after quite some time, maybe as long as 36 hours. I
looked at the caps on the video card and none have any obvious bulging
or leaking. So I'm just gonna shop around for video cards and when the
new power supply is installed if the video out fails again then I'll
get the card I want.
Eric
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