DPM 2340 image setter error code 2209

We have had to set this voltage in the past. the employee who was taking care of this is no longer available. i see on a "cheat sheet" it is supposed to be at 26 volts.
Anyone familiar with this adjustment? Marc Andy now, apparently owns this manufactuer and won't do phone support on this subject. i am familiar with high voltage situations.

 

Hi sir:
Hope you are well
The most important thing is to test the 4 Voltages in the power supply:+24Vdc+12 -12+5vdc.
26? I Did not see in any part of schematic diagrams. There is NOT exist, maybe you did a mistake about this number.
However i strong recommend you test the power supply as i did indicate in my schematic diagrams for this machine, must be in Tolerance.