Oscilloscope - Leader LBO 513A Half Screen

[Kolvir]

I was given the scope, but it suffered so damage in shipping. The CRT only shows on the left side. The photo is supposed to be a square wave from the test terminal. Does anyone have suggestions of where I should start looking to fix this? I have the service manual. This is my first scope, so I don't know where to start. It worked fine before shipping.


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[torquil]

Does it have wires going to horizontal deflection plates in the CRT? And if so, is one of them loose?

[Kolvir]

I'm not sure, I am trying to tack it down, but haven't been able to find that exactly. I've checked all of the wires coming out of the CRT and they appear connected correctly. I think the unit took a blow to the side during shipping and am afraid there might be a broken solder joint or trace. Someone told me to get out the magnifying glass, but I don't have a lot of experience at this and am not sure I will spot the break.

[David Hess]

My first guess would also be that one of the horizontal deflection leads fell off.

Are the horizontal and vertical calibration correct?

[madao]

a dumb ask: did you turn horz position pots?