Trouble after setting scanning offset adjustment

Hi new to lasers have just got a Chinese laser trying to go through all the calibration and set up I have been trying to do the scanning offset adjustment I can get it so lines are perfectly lined up on x axis but then the scan lines start late Finnish early in comparison to the line around outside

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Please has anyone got any idea on a fixe for this?

So my latest research indicates this is going to be a wiring issue with the power supply and rdc6442s controller I have been searching for a wiring diagram so I can confirm this as all I have to go by is a picture someone posted on fb of how they changed the wiring to fix the exact same issue but I am unwilling to mess with the wiring without anything I can use to confirm it will be correct if anyone knows where I can find a wiring diagram I can use it would be a massive help

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