[1000mp] Yaesu Tech Support

Thu, 27 Mar 2003 13:09:41 -0800

Hi Carl,

Many thanks for the kind comments. Actually, it's a Quadra page with a link
to VA3CR's marvellous FT-1000MPsite. I also have a lot of Icom material on
my site.

Here's a troubleshooting tip: All switching power supplies incorporate a
start-up circuit, which initiates oscillation in the main high-current
chopper circuit during power-up. What you can try is to measure the voltage
at the terminals of the [POWER] switch on the front panel of the VP-1000. If
there is no voltage present at this switch, with the VP-1000 connected to
the mains, the rear-panel breaker on and both cables connected between the
VL-1000 and VP-1000, that may suggest a problem in the start-up circuit.

I agree that a mains spike filter would be a very wise precaution,
especially if you live in an area with a lot of electrical-storm activity.
It is also prudent to disconnect all radio equipment from antennas, and the
mains, when not using it.

Cheers for now, 73,
Adam VA7OJ/AB4OJ

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Carl Kimball
Sent: Thursday, March 27, 2003 12:17
To: [email protected]
Subject: Re: [1000mp] Yaesu Tech Support

You're right, Adam --

I just retried the number, and it works. The helpful technician told me
three key things:

1. The telephone system was out all morning;

2. They are way behind in answering the eMail backlog; and

3. I probably don't want to attempt taking the PSU apart, no matter how
skilled I might think I am! The outside cover is easy, it's the one inside
that's the problem. Sure, I'll get it apart, but I may never get it back
together properly.

He agrees that it might be the start-up circuit, but no way of telling, and
no easy fix.
Unfortunately, as you probably know, the Quadra Service Manual is pretty
lacking in PSU information. I wonder how you know there "is" a start-up
circuit?

When I get this resolved, I've got a 15 amp industrial strength line filter
sitting here that I'll use. Not sure yet if it was a component failure or a
line spike.

So folks, Yaesu is still around, and there really are people at the other
end of the line.
Looks like a big Hmmmm... to me! I should have read the sign over my desk:
Patience, Patience, Patience.

You have a nice FT-1000 web site, by the way. Very helpful.

Carl  WV1G
+++++++++++++++++++++++++++++++++
----- Original Message -----
From: "Adam Farson" <[email protected]>
To: <[email protected]>
Sent: Thursday, March 27, 2003 2:05 PM
Subject: RE: [1000mp] Yaesu Tech Support

Hi Carl,

It sounds to me as if the start-up circuit in the 2.5 kVA switching PSU
module inside the VP-1000 cabinet has failed.

..............deleted.............

Hope this helps.

Best 73,
Adam, VA7OJ/AB4OJ
North Vancouver, BC, Canada
http://www.qsl.net/ab4oj/

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