29 Oct
2013
29 Oct
'13
10:34 a.m.
On Sun, Oct 27, 2013 at 12:50:16PM -0400, Michael Thompson wrote:
I measured the voltage drop on all of the transistors and diodes on the
R303 is slot A21. All of the measurements look OK. I am not really
qualified to debug an R module to the component level, so a replacement
module would be really helpful.
I didn't have it when I was repairing mine but Vince has done layouts for
many of them which help in finding the components if your version
matches the ones he did. As far I as know DEC never published the layouts
for the simple modules.
http://so-much-stuff.com/pdp8/flipchip/flipchip.php
The free level of Eagle will view them.