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Nad Equipment failure and revival

G

GregS

Jan 1, 1970
0
I was fiddling with a Nad receiver over the weekend. I wanted
to check once again about obtaining an obosolete FM chip
I bought the receiver about 7 years ago. I might have rebuilt the power amp
section but the FM did not work and the chip got extremely hot.
I figured it was bad. Now 7 years later I fire it up and am surprised
it works. Not getting hot either. I'm thinking 3 possibilities.

Possible short or power supply problem.
Capacitors doing something different.
Spontanious resurection of the chip.

??

greg
 
W

William Sommerwerck

Jan 1, 1970
0
There might have been a short on the PC board (such as a stray wire end)
that caused the wrong voltage to get to the wrong pin of the chip. I saw
this happen once with an op amp in a kit I was assembling. When I removed
the solder blob, it worked fine.
 
G

GregS

Jan 1, 1970
0
There might have been a short on the PC board (such as a stray wire end)
that caused the wrong voltage to get to the wrong pin of the chip. I saw
this happen once with an op amp in a kit I was assembling. When I removed
the solder blob, it worked fine.


The equipment has moved around since way back, several times.
There is a layer of dust on the uncovered equipment but
I don't think that helped anything. Something to keep in mind though !

I got some other Nad stuff to fix. Nasty how some of the traces have melted
in some cases. I bought all this broken stuff on Ebay.

greg
 
A

Allodoxaphobia

Jan 1, 1970
0
I was fiddling with a Nad receiver over the weekend. I wanted
to check once again about obtaining an obosolete FM chip
I bought the receiver about 7 years ago. I might have rebuilt the power amp
section but the FM did not work and the chip got extremely hot.
I figured it was bad. Now 7 years later I fire it up and am surprised
it works. Not getting hot either. I'm thinking 3 possibilities.

Possible short or power supply problem.
Capacitors doing something different.
Spontanious resurection of the chip.

4. A memory as reliable as mine. :)
5. Leprechauns
 
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