Regarding the 40% CH1 and CH2 error, are you using the 50 ohm input or the 1M ohm input? If the former, are you accounting for the voltage drop associated with the low impedance input?
I agree that a low voltage PS recap may address the sawtooth issue.
Good luck,
Patrick Wong AK6C
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--- In TekScopes@..., "machineguy59" <machineguy59@...> wrote:
...Also, measured ampltudes on channels 1 and 2 seem about 60% of actual but amplitudes on Channel(s) 3 and 4 seem about right (certainly within calibration range).
...If its worth the repair I would recap the LVPS as others here have done, that seems simple enough and an obviously wise investment. In fact, this recap may correct the vertical sawtooth and perhaps the blurry text. But I dont think it will change the vertical gain/calibration to correct for the 40% error.
