C203 magenta completely across prints

**mrfuser** · 03-04-2019

Replaced iu, same result. Full magenta page. Maybe bad ground in back?

**copyman** · 03-04-2019

Ok, if you tried another IU then you have to look at high voltage problem, bias for background, etc.

Could be a contact but I've never had to clean any on that model and I was servicing a lot of them at one time.

I could be wrong about the print head but again I was servicing a lot of them at one time and only time I replaced PH's was for laser error codes, never for full color background. Especially the older serial #'s with old style PH's, cold really affected the motors not quality. There was a bulletin to change setting to make them spin longer in cold weather or something like that.

**mrfuser** · 03-05-2019

Bad contacts on power supply to imaging unit! Sheesh that’s a no fun job!!!

**copyman** · 03-05-2019

Ouch! At least they changed design and made easier to open rear cage on newer machines. Actually the main thing and PIA is getting the rear cage out of the way. I disconnect only the connectors needed and let cage hang to right. Of course you have to remove fax, hdd, some covers and a lot of screws first. Once you have cage out of the way HV pwb is right there.

Let me know if you need anything. Have several working machines.

**mrfuser** · 03-05-2019

Some New knees after working on the floor for five hours on this dumb machine would be nice !!

Very stupid design On these old Dogs

**copyman** · 03-05-2019

I hear you, have knots on both my knees, bad back from 40 years of servicing these beast. What did my back in was 2nd floor deliveries, carrying by hand. Didn't even know there was such a thing as motorized stair climber haha. Only thing that makes it worth taking apart a machine that much is it takes care of the initial problem and no new issues happen from taking it apart. Good luck