KONICA C360 PRINTING BAD

[JC Andres]

My Konica Minolta is printing this way, cyan yellow developer is remanufactured, complete new drum and remanufactured cmy.
It also has p18 and p21
Transfer, laser, voltage card, source, fuser and IDC sensor have already been changed

[copyman]

I know you said you changed several parts but I can only tell you what fixed those P codes & issues for me "many" times. You need at least the magenta & cyan drums. Clean laser windows with wand. Then remove the transfer belt & clean the IDC sensors. Last do graduation adj.
I think you will find issue is with the reman drums / dev units

[JC Andres]

I know you said you changed several parts but I can only tell you what fixed those P codes & issues for me "many" times. You need at least the magenta & cyan drums. Clean laser windows with wand. Then remove the transfer belt & clean the IDC sensors. Last do graduation adj.
I think you will find issue is with the reman drums / dev units

I can't because the gradation adjust show me "Stabilizer NG" i think it's for the P codes

[JC Andres]

out of phase

[copyman]

Yes you need to get rid of P codes first or stab / gradation will be NG. Thats why I said do last. With the registration that off the gradation adj wouldn't help anyway. I still think there is at least a drum issue that has to be addressed first. This is why when using aftermarket supplies it is so hard to troubleshoot a print quality issue. How does just black look, like the config & font test pages?

[JC Andres]

I change the PH unit (Láser) and it's good only the magenta?

[Woxner]

I think your problem will come back on p codes. Clean the idc sensors. They align colors. Turning machine on and off can sometimes temporarily cure color alignment. Who knows the last time they were cleaned. Make sure to open the windows to clean.

[JC Andres]

I think your problem will come back on p codes. Clean the idc sensors. They align colors. Turning machine on and off can sometimes temporarily cure color alignment. Who knows the last time they were cleaned. Make sure to open the windows to clean.

I clean the idc and i changed also but now it's doing this

Magenta is missing a line apparently for printing and the dots also

[copyman]

Swap around yellow & magenta drums and see if yellow has same symptoms after. If it does follow to yellow than as I suspected from my first post the original magenta drum is bad.

[Mildred]

Looking at your samples and photo of Transfer unit there seems to be a lot of waste toner on the drive gear and side frame etc.
Is the Transfer unit waste toner auger blocked and causing excess friction on the transfer belt cleaner blade causing the registration issue. This normally has a gear jumping sound from the cleaner unit. Also in the magenta gradation sample looks to be greyish dots from dropping waste toner or Black toner. Replace with new KM Transfer unit and 2nd Transfer roller.

As mentioned try swapping over a colored drum (yellow) with the magenta for fault finding.
you also mentioned you are using remanufactured Developers and Drums.
I would try original Konica Minolta dev units and drums. Sorry I'm not a fan of remanufactured or aftermarket parts.

regards Rob

[kingarthur]

clean the IDC sensors, then carry out initialize & image stabilization, then carry out the gradation

[JC Andres]

The magenta drum was changed for cyan and yellow and the magenta came out exactly the same, I changed the transfer belt, cleaned the transfer rollers and it is still the same, I think it is voltage.

[femaster]

I clean the idc and i changed also but now it's doing this

Magenta is missing a line apparently for printing and the dots also

We recently had the same exact output where the gradation page for only cyan was missing the darkest shade from the output, like in your example of magenta. Our issue was on a C308 however. Replacing the laser unit was what fixed it. It sounds like you've change the laser unit twice now? Maybe there is an issue with the Print Head Relay Board (PH Relay Board), or the ribbon cable that goes to the PH Relay Board from the system board in the back side of the copier. Bad connection perhaps.

[JC Andres]

We recently had the same exact output where the gradation page for only cyan was missing the darkest shade from the output, like in your example of magenta. Our issue was on a C308 however. Replacing the laser unit was what fixed it. It sounds like you've change the laser unit twice now? Maybe there is an issue with the Print Head Relay Board (PH Relay Board), or the ribbon cable that goes to the PH Relay Board from the system board in the back side of the copier. Bad connection perhaps.

Yeah i change that board on the láser unit, and the print was well

[JC Andres]

Also one drum was faulty