Try putting a light load on the transformer when you measure the output
voltage (maybe 1K). You may find that terminals 2-3 are open circuit
rather than short. Maybe that's why CR10 survived - the transformer
blew first.
Ed
Brooke Clarke wrote:
Hi John:
It's hard to say. With the A4 Inguard p.s. board removed when powered
up the fan comes on and the display lights up with the error message.
So, measured on the primary side, there's 25 ma AC current going to
the transformer then to the Outguard p.s. and fan.
Have Fun,
Brooke Clarke
http://www.prc68.com
J. Forster wrote:
Looks like it. Does the transformer draw much current with the PCB
removed? If it has shorted turns, as it appears, it likely will. Does it
get hot?
-John
=================
Hi:
I think the power transformer got cooked. Have a look at the Vac
and Ohms
data: http://www.prc68.com/I/HP3458DVM.shtml#T1
Force a browser refresh to see the latest schematic.
Have Fun,
Brooke Clarke
http://www.prc68.com
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