[Test-Equipment] B+K 1460 Scope

[W1GOR]

Hello Howie,

Go to http://bama.edebris.com/manuals/b&k/1460/ and download the SCHEMATIC 
(1460sch.pdf (1 MB)) and the partial copy of the USER MANUAL (1460.djvu (258 
KB) of the B+K 1460 Scope.  You will need Adobe Reader for the PDF file, and 
IRFANVIEW for the djvu file.  Google for free copies of each reader... At 
the BAMA site, many manuals are readily available, and are posted in PDF or 
djvu files (other file styles are also used, so download 'readers' as they 
are needed).  If you have any problems obtaining the 'readers', let me 
know... I can send copies as attachments to an email.

When you print it, we can discuss your problem.  I have already printed my 
copy of the scope, and I'm looking for components that might cause the 
problems that you have described.

Initially, the problem is an 'unbalance' in the input attenuator and/or the 
input amplifier.  Note that this scope, like many higher-end units, utilize 
balanced Vertical Amplifiers.  I'm looking for a service manual that will 
provide detailed alignment and calibration procedures.  It is possible that 
the only problem is a re-alignment of the input amplifiers, where the 'DC 
Balance' pot, VR101, needs to be adjusted to bring the amplifiers back into 
balance.  A copy of the alignment procedure will cover this adjustment.

Whatever you do, DO NOT make any adjustments without following the 
manufacturer's explicit instructions.  Many adjustments are 'interactive' in 
that each adjustment may affect the action of other adjustments.  The key is 
to maintain BALANCE all the way from the input attenuator to the deflection 
plates of the CRT.

Cheers, Larry - W1GOR, Gorham, Maine

Save the Planet.  It's the only one with Chocolate!



----- Original Message ----- 
From: "Howie" <Esrman at ameritech.net>
To: "Discussion of Electronic Test Equipment" 
<test-equipment at mailman.qth.net>
Sent: Monday, February 01, 2010 8:49 AM
Subject: [Test-Equipment] B+K 1460 Scope


>I have this scope and the + v/cm switch has various voltages on it such as 
>.1 v/cm and 20v/cm.
>
> 11 Different positions.
>
> On most positions I can use the "position" switch to bring the line on 
> center of screen.
>
> But there`s 2 that I cannot get it to even come on screen.
>
> There`s 2 diferent pots to set this.
>
> Also the "avariable" will move the line up and down even without an input 
> signal.
>
> Any help will certainly be appreciated.
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