Re: HP AN/USM 281A Oscilliscope needs repair (San Antonio TX)
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The troubleshooting flowchart on the manual says to replace two gallium transistors on that board.
I tried the whack test. Nothing.
I'm just thinking that maybe I don't have the settings right on the unit, because I'd feel really dumb to put work into replacing a board only to find I didn't have a switch turned on or a knob in the right setting.
Andrew
Hey Andrew,
I don't know anything about your specific scope. However, while this is a Tektronix document <> it has good general advice on how to troubleshoot any analog scope. The older versions of XYZs of Oscilloscopes <> are also very appropriate for learning about the general workings of scopes of this vintage.
Siggi?
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