Hello,
?
hello,
Sunday, I took back my Agilent 54810 and wanted to replace my Atlas motherboard with my A-Trend 71110M Card.
This motherboard works perfectly with an ATX power supply (it has the 2 types of power connectors)
Once installed, (connection power is done by connectors P8 P9) it does not seem to start (a bit like the Atlas board that seemed to have a random start), I see that the signal "Power Good" is at 78 millivolts!
The 5v seemed to be at 5.18V (from memory). I don't know if it's to much?
On power supply you have 4 potentiometer? for each power (+5,-5,+12,-12)
I took the acquisition board apart and followed the Power good signal.? It arrives on a circuit TL7770-5, which controls the 5v I think.
The components around seem good. (r¨¦sistors)
An idea apart from a circuit out of service?
Have you the schematic of this board 54810-66501??
?
nb: This day (tuesday), the motherboard work and the power good signai is at 5v!!!
?
Is it the fact of having dismantled the acquisition card? (False contact on a cable, a weld,???)
I measured the tensions:
5.06v recommended 5.1v
-5.31v recommended -5.1v
12.26 v recommended 12.2v
-12.32v recommended -12.2v
This material is not far from the 30 years and has probably drifted in time.
Is this a reason for the power good signal to drop to 0?
It is controlled by a TL7770 -5
Can I re-weld his paws?
Remaking a voltage adjustment? It¡¯s a bit tricky but doable.
your opinions
nb: I have posted the pb on forum Eevblog, but no answer?
?
your opinions
cdt
Gerard
