2230 Position Control Alignment

christopherbath@...
 

Hi,

I am trying to do some calibration work on a 2230 scope. The position control is somewhat misaligned and normally to centre the horizontal sweep the position control is not in the 12 o’clock position. I could not see an adjustment (on the schematic) or adjustment procedure for this in the service manual. Is there any way to adjust this or does this suggest that there may be something wrong with the horizontal amplifier\CRT?

Thanks,

Chris

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