Test signal moving laterally

[fixthings]

I have completed the assembly and set the test signal to the specified settings and I get a rapid movement to the right on the display. If I press the hold button the signal trace appears as it should, but taking the hold off puts the wave on the move laterally again. Any suggestions?

[jye1]

Please try adjusting the trigger level to see if you can stable it.

[tatyanaksyonova]

can't sync test signal

[jye1]

What was the timebase you used? Have you tried adjusting trigger level? It would allow us to understand the issue better if you post photos showing the problem.

[tatyanaksyonova]

Found the cause , a defective switch AC-DC-GND switches constantly AC-DC , is Also not healthy JYE 117 .