Digest for sci.electronics.repair@googlegroups.com - 3 updates in 2 topics

thekmanrocks@gmail.com: Jul 20 05:36PM -0700

Just got my third JVC RX-515V in the mail
today - fully functional, but with same
problem:
 
The smaller PC board perpendicular to the
mother board connection has eroded over
21 years. Out of the box, no center channel
in pro-logic mode. After some wiggle and
tapping, it worked.
 
 
So what I will do is use this RX Receiver as
a stereo only for all my analogs, and feed tape
1 out to a modern digital X.1 surround receiver
with pro-logic for surround from 2-ch sources.
jurb6006@gmail.com: Jul 20 08:13PM -0700

Where are you geographically ? Maybe you should just bring the thing over (Ohio) with some money and some beer.
 
If I fix one here, you'll probably know how to fix the other two, unless you smoked the original one.
 
But really, in text this is worse than trying to do it over the phone unless you are with some seriously good people with tech and communicationg by whatever means.
 
I am different than alot of techs, I WILL let you watch.
 
It's the talking that can costya.
aarebrot@gmail.com: Jul 20 07:44PM -0700

I have a Panasonic NN-P295SF microwave that sits over the range. It came with the house when we bought it and it about 10 years old (manufactured in 2004). Last week it started doing this thing where it would run for three seconds, then stop. Later the same day it would run, but it's making a weird whiny sound when it starts and briefly when it stops. I believe the sounds is coming from the motor powering the magnetron cooling fan.
 
Video here: http://1drv.ms/1KdmmEH
 
I have an avionics background but it was a long time back and I have zero experience with appliances. I've tried to find schematics for the oven, but no luck. Someone suggested checking the thermostats. There seem to be two of them. One is <1 Ohm, the other is infinite. I have no idea if they're supposed to be like that or if one of them is busted.
 
Picture here: http://1drv.ms/1GxxtU2
 
Seems to be this model: http://www.asahikeiki.co.jp/en/product/us-622/
 
I'd really appreciate any advice on how to troubleshoot this. I know microwaves are dangerous. If the magnetron or high voltage capacitor is busted, I'll go buy another one because I don't want to piss around with that stuff. But I'd like to save some money and repair this one if I can.
 
Thanks!
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