Intermittent service codes on MP301

[Voltage]

Hi Guys

Has anyone come across MP301 that will intermittently give SC144. Switching the machine off for a few minutes fixes it for a while.

I have check all cabling of the board and the ribbon cables

I have also updated the firmware.

In the sc history i also find that the machine has gone into SC 101 and sc 141

I do not have another machine so i can swap some of the boards and i have to make sure i order the right boards as they are obliviously very expensive

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[Eric1968]

SC101 : The scanner has scanned the white plate but can not detect the white level.
SC141 : Automatic adjustment has failed to correct a current black level to the certain level.

I would say a defective SBU.