25 Aug
2014
25 Aug
'14
4:58 p.m.
On 08/25/2014 03:49 PM, Brent Hilpert wrote:
Hopefully the forward-biased zeners clamped the bad
voltages and
saved the 8080, but you should ensure that those regulator components
are within spec and still functioning properly. If the regulator
components got as far as burning enough to smell them, it may be a
good idea to replace them.
I'd replace all of the linear regulators anyway. The 8800 run some of
them very hot--it particular, the 4K DRAM boards had to have shunt
resistors across the 7805s too keep them at some sort of sane
temperature. Heat+age+semiconductors can make for a bitter cocktail.
--Chuck