Depending on the history of your scope, the U400 pins may be corroded and make it hard to remove.? This isn't common nor likely, just possible.? So voe the screws that hold it in place and pry gently to lift it from the board.? If it doesn't come with reasonable pressure you may have to pull the A1 board from the scope and check the pin side of the board for corrosion.? But as I said, its not likely.
From: "Barry n4buq@... [TekScopes]" <TekScopes@...>
To: TekScopes@...
Sent: Tuesday, March 29, 2016 7:48 AM
Subject: Re: [TekScopes] 2465B U400 Availability?
? Regarding the U400, I've never pulled one of these. Are there any special precautions for pulling and/or reinserting these? I realize standard precautions for static, etc., but anything else?
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "machine guy machineguy59@... [TekScopes]" <TekScopes@...>
To: TekScopes@...
Sent: Monday, March 28, 2016 11:56:18 PM
Subject: Re: [TekScopes] 2465B U400 Availability?
The U400 could cause problems in calibration but it is difficult to tell
without testing.? However, it is possible to display a vertical trace?even
when there are certain faults in U400.
Unfortunately, U400 is harder to obtain?than other parts and most sellers
?(eBay?and otherwise) price accordingly.
You could consider buying a low price "parts scope" to cannibalize for parts.
? Most 2445 and 2465 parts will fit the 2465B.? The U400 fits them all.
Much of your decision depends on the credibility of the seller and the price.
? Perhaps you can negotiate a price dependent on repair costs.
From: "Barry n4buq@... [TekScopes]" <TekScopes@...>
To: TekScopes@...
Sent: Monday, March 28, 2016 3:34 PM
Subject: [TekScopes] 2465B U400 Availability?
? I'm looking at buying a 2465B that's supposedly needs a U400. Scope
? appears to work somewhat (calibrator trace looks good, etc.) and price
? is good.
I'm wondering what I may be getting into here. Are U400's very hard to find
at a reasonable price? I see them on eBay but wondered if there's a better
source (perhaps here?) for them.
Also, is it "normal" for the 2465B to display any trace (e.g. the calibrator)
when U400 is bad? In other words, I'm wondering if U400 is really the
problem with it or possibly something else (apparently it won't calibrate).
NVRAM maybe?
Thanks,
Barry - N4BUQ
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