[Test-Equipment] Tek 7613 with 7L13 plug-in help

[David Hopkins]

At 01:07 PM 3/02/2009, you wrote:
>Greg,

Look for shorted tantalum Caps.
Actually replace ALL tantalum caps in the plugin.

These caps are notorious for going short after all this time.


David

>Hi all,
>
>Does anyone have any experience repairing the 7L13 Spectrum Analyzer
>plug-in from Tektronix?  I am working on one with a 7613 storage scope.
>It seems the scope's power supply is dragged down by the plug-in when
>it's installed (the 7613 power lamp is dim).  I've run the scope without
>the plug-in and it seems much happier (the power light is full
>brilliance, etc.)
>
>This is what happens when the plug-in is installed:
>-  No reference level or center frequency LED readout on the plug-in.
>-  There is a dot about one major division up from the bottom of the
>screen which can be slightly controlled by the vertical position control
>on the plug-in.
>-  There is no horizontal sweep.
>-  There is no on-screen readout.
>
>Instead of wasting time digging, if anyone has any suggestions or knows
>of any common problems with the 7L13 I would GREATLY appreciate it!  I
>have the manuals for both the scope and plug-in.
>
>Thanks!
>- Greg
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David G. Hopkins (VK4ZF)
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AUSTRALIA
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