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oscilloscope help needed

Thread starter #1
Hello all! New guy here. Please forgive me if i have posted this in the wrong place.
I am fairly new to electronic repairs, which i am trying to learn for the repair of older audio equipment. I recently bought an oscilloscope from ebay. It is a Leader 8106. It worked fine for about 2 weeks, then the next time I turned it on, the trace was gone on both channels. I have found that if I turn the horizontal adjustment fully to the left, i have a bright dot. That is all. I am a bit leery about opening this unit up due to the high voltages and my in-experience.
Any ideas as to what I may have done wrong, adjustments to make, or places to read would be very much appreciated. I did buy a warranty with the unit so that is also an option.

thanks all sb


Well-Known Member
Most Helpful Member
Welcome to ETO, sweatybetty!

Horizontal Sweep has failed.

Given your stated lack of experience, I'd execute the warranty option.


Well-Known Member
or the horizontal sweep got set to XY mode by mistake.

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