PM3384 Failed Calibration Need some info

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I have a pm3384 and it keeps failing the autocal. I went through the manual
 calibration, and it was in need of that, but in the end it still failed wi
th error d1a. I've read the service manual and cannot find any reference to
 this error. Wondering if anyone may know what d1a is and where to start lo

The scope works for the most part, but when using cursors they are way off.


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