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Electronics => Repair => Topic started by: Tectonic on April 22, 2017, 01:15:16 pm

Title: TDS520D Horizontal position not moving
Post by: Tectonic on April 22, 2017, 01:15:16 pm

I can't move waveforms horizontally on my TDS520D. The horizontal position knob isn't moving waveforms. I've tried a few troubleshooting steps to no avail:

• Factory Reset (normal and DPO)
• Diag/Err: no failures
• Pressing the help button then turning the horizontal position knob does display its help text
• I replaced the front panel. No change.
• Tried both channels with different probes
• Checked the zoom menu and tried the different lock/unlock functions

Am I missing some hidden locking function which persists through a factory reset? Should I be looking at the acquisition or processing boards? Any advice is greatly appreciated.

Title: Re: TDS520D Horizontal position not moving
Post by: capt bullshot on April 24, 2017, 01:35:19 pm

Did you set the acquisition length to more than 1000 Samples?
Did you turn off the "fit to screen" option?
Did you turn off DPO / InstaVu mode?

Title: Re: TDS520D Horizontal position not moving
Post by: Tectonic on April 24, 2017, 11:31:16 pm

Did you set the acquisition length to more than 1000 Samples?

• Set to 5k

Did you turn off the "fit to screen" option?

• It's off

Did you turn off DPO / InstaVu mode?

• It's off