On Tuesday, March 4, 2003, Tony Duell wrote:
>> Well, I finally got around to testing the PSU on my 11/34. ... Everything
>> checks out except for the -5V and +20V. ... However, some of the other
>> voltages coming from the H745 (according to the BA11-K FMPS) seem to be
>> OK.
>
> I thought the H745 provided +20V and -5V only. What other voltage do you
> think it's providing...
My multimeter shows the following voltages on the mate-n-lock connectors
J3,5,7,9,11 relative to pin 8 (ground):
+15V at pin 6
+5V at pin 12
-15V at pin 15
The printset -- specifically, sheet 2 of 5410864-0-1 "PWR DIST BOARD" (page
40 of the BA11-K FMPS PDF I downloaded) -- leads me to believe that these
voltages can come only from the H745.
Other documents agree with you, though. I'm confused.
> I would unplug the 8 pin connector from any brick you're not actually
> using, particularly if it seems to be defective. Since that's all the
> connections to the brick, the defective brick can be left physically in
> the chassis.
Thanks. My next step, then, is to pull the cards, inspect them, and clean
out the backplanes and other currently hard-to-reach spots. Then I'll check
for bent pins on the backplanes and eventually test a minimal card set.
I'll double-check, but it looks like all my NPG jumpers are in. I don't have
any NPR peripherals except for the RK11-D, and I have ample "bleeding
knuckle" G727A grant cards. I don't *expect* any grant issues.
--
Jeffrey Sharp
Received on Tue Mar 04 2003 - 19:59:01 GMT