On 23 Jun 2006 17:32:37 -0700, wrote:

Update:

I checked all my connections again, put it all back together, and
lo-and-behold, I got the display to work "normally".

When I press the "start" button, though, the [new] motor engages, the
drum does not move, and the display goes immediately to all segments,
or "8.8.". The dryer then turns itself off.

I unplugged the dryer, replugged it, and now it's only displaying
"8.8." again.

So it's intermittent and probably electrical. Fried board?

Thanks.

Pierre

The best way to check the power (low voltage DC rails) on the board is
with a scope.

Faulty ground returns to any of the components could be another
problem.

And my problem with Neptunes is, I'm not too familiar with them,
since I quit the business (doing residential) about 13 years ago.

This makes it really, really hard to fix it over the internet. ;`

Most service techs would just swap boards, anyway. Few will dig down
to component level on a PC board. The only reason I feel comfortable
doing it is I used to make a living working on CPU boards back in the
70's. A customer would often bring in a dead board for exchange, and
we'd swap for a refurbished one. When all customer repair orders were
done, we'd refurbish our own stock, and sell them for $200, with
exchange. the field techs would just bring the boards in to us for
repair or exchange. It's a good business, especially if you are
factory authorized, because then you get all the warranty work, as
well.

But I digress...





wrote:
Johnny:

Thanks for the thoughtful response. I am concerned that I don't know
how to check either of the boards or know how to check the capacitor on
the control board. If you have the time and inclination, could you let
me know how to do that? I have a multitester, but that is the extent of
my electronic knowledge.

Thanks.

Pierre


~^Johnny^~ wrote:
On 23 Jun 2006 02:46:54 -0700, wrote:

Now for the perplexing part; it's not a difficult repair, nor is it
easy to mess up; however, my display panel now shows "8.8." and will
not do anything. It won't even turn off from the panel; the "off"

Looks like the processor has halted. All the display segments
are lit up, and that's why you get 8.8.
Power supply issues, to the CPU, maybe (5 volt problem)?
Look for a bad filter capacitor on the control board.
Check both PC boards. Though it's not likely the motor control.
Sounds like a CPU power issue. Pray that you didn't blow the
CPU (a costly replacement, although this is rare).


--
-john
wide-open at throttle dot info
--
-john
wide-open at throttle dot info