Hi all,
On the heels of success fixing our 2712 (thanks again, Jaap!) I was doing some digital circuit design using all four channels of the 2465 (although I doubt this fact played any role in the failure) and all of a sudden I heard a sound like an electrolytic cap venting and smoke poured out of the back of the scope, propelled by the fan.
Being very familiar with it after fixing lightning damage seven years ago I immediately pulled it apart, hoping to find a still-smoking part...and I cannot find anything visible..no cap vent residue, no overheated parts. I measured many (but not all yet) electrolytics and they measured in spec with low D and ESR. All the power transistors in the supply measured good...what the heck was the noise and smoke?
I had read about the X and Y caps in the AC input filter failing, but mine was cold to the touch making me doubt any heat could have evolved from any internal components. Has anyone had this experience with any of the 24xx series scopes? I plan to pull the AC input module out and check it later, but for now I am baffled.
Thanks in advance for any clues!
Cheers & 73,
Howie / WA4PSC
