16 Feb
2015
16 Feb
'15
12:38 p.m.
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of
js at cimmeri.com
Sent: 16 February 2015 16:16
To: General at classiccmp.org; Discussion at classiccmp.org:On-Topic and Off-
Topic Posts
Subject: Re: VT101 8085 CPU Fault
On 2/15/2015 5:24 PM, Robert Jarratt wrote:
What other tests would you suggest? I do have a capacitance meter to check
values. I would have desolder them of course. Would you test just the
electrolytics or all of them? I don't have an insulation tester though. Any
other tests?
Regards
Rob
I have checked the ESR on all the electrolytics,
they are all fine.
Prior to all this I had replaced C439 with a higher voltage rated
component, as recommended here: https://trmm.net/VT100. I used a 100uF
part, rated at 100V. I had also replaced C437 as that had a high ESR
prior to seeing this problem.
Is there anything else I should check?
ESR alone is not enough to validate
capacitors.