c552 perfect 1st print then color misalignment from then on

[skywalkers]

The first print will print perfect. Any prints past the first one has color shift of yellow and cyan. I am printing from drawer 4 the left side of the print will be good on all prints but the other 2/3rds of the page will have the color shift from top to bottom. I have done run the stabilization and gradient adjustment, cleaned the sensors below the fusion unit, reset the skew sensors, cleaned the laser path under all the IU's. Really just don't understand why it does one perfect and then the rest are out of alignment. Then I can print the job again and same thing the first one is fine and the rest is a mess and it don't matter if I print 3 or 30 all of them after the first one is bad.
Any help would be greatly appreciated.

[Synthohol]

Re: c552 perfect 1st print then color misalignment from then on

what happens if you feed it from the bypass?

[skywalkers]

Re: c552 perfect 1st print then color misalignment from then on

what happens if you feed it from the bypass?

I get the same results no matter where I print from including the bypass tray. I also get the same results if I scan and copy vs sending print from computer.

[Gift]

Re: c552 perfect 1st print then color misalignment from then on

That's odd - color skew starting in the middle of the 2nd page - perhaps it's related to the ITB or drive section (some stiffness).

How's the PM status and counter of that machine?

Does it make any difference if you run different dpi or paper thickness settings (=forcing different process speed might end up as workaround^^)

[L0rdC]

Re: c552 perfect 1st print then color misalignment from then on

That's odd - color skew starting in the middle of the 2nd page - perhaps it's related to the ITB or drive section (some stiffness).

How's the PM status and counter of that machine?

Does it make any difference if you run different dpi or paper thickness settings (=forcing different process speed might end up as workaround^^)

I am with you, I would like to know the life of that ITB and I would try a test with Magenta

If magenta has the same delay, we are facing an itb problem, it does not rotate correctly

[skywalkers]

Re: c552 perfect 1st print then color misalignment from then on

That's odd - color skew starting in the middle of the 2nd page - perhaps it's related to the ITB or drive section (some stiffness).

How's the PM status and counter of that machine?

Does it make any difference if you run different dpi or paper thickness settings (=forcing different process speed might end up as workaround^^)

Sorry it has been so long getting back. Changing the paper thickness made no difference. I have now replaced the whole ITB section where I normally just change the belt and no difference. I also changed the laser unit out from another machine and I have replace the cyan imagine unit and still the same results. The reason I changed the Imagine unit is because I printed a 30% cyan, magenta and yellow page and all pages had color shift from about 1/3 of the page on but on the cyan I had a dark line down the length of the page and if I print out of a different drawer with the paper turned the line and the fade turns with the paper. I have attached pages to show the fade and the line. also the line starts at the same spot as where the colors where out of alignment on the letterhead page. at this point I really don't know anything els i could be other than maybe the driver board the runs the laser.
Any Ideas?

[skywalkers]

Re: c552 perfect 1st print then color misalignment from then on

Sorry it has been so long getting back. Changing the paper thickness made no difference. I have now replaced the whole ITB section where I normally just change the belt and no difference. I also changed the laser unit out from another machine and I have replace the cyan imagine unit and still the same results. The reason I changed the Imagine unit is because I printed a 30% cyan, magenta and yellow page and all pages had color shift from about 1/3 of the page on but on the cyan I had a dark line down the length of the page and if I print out of a different drawer with the paper turned the line and the fade turns with the paper. I have attached pages to show the fade and the line. also the line starts at the same spot as where the colors where out of alignment on the letterhead page. at this point I really don't know anything els i could be other than maybe the driver board the runs the laser.
Any Ideas?

I have now changed the laser driver board and get the same print of cyan with the blue line

[skywalkers]

Re: c552 perfect 1st print then color misalignment from then on

I have now changed the laser driver board and get the same print of cyan with the blue line

I changed the fuser unit and that fixed the light image on 2/3 of the page but I still can't get rid of the blue line on the cyan print. It will print the first one perfect and then the rest have the line. See attached image. I have changed the cyan IU, the laser bed and the Image transfer belt. I am sticking out on this printer. any Ideas would be greatly appreciated

[DelawareJim]

Re: c552 perfect 1st print then color misalignment from then on

Just a couple thoughts. What is the Total number of copies/prints on this machine? That might be important if it is in the millions?
First, just to try something, do a trouble reset. I have seen many crazy symptoms that have cleared up by doing a trouble reset.
Next, when looking at your sample cyan prints, I noticed that the cyan print runs down the paper crooked. Probably the paper is running crooked. On the left side of the copier, pull open the lower access door. Inspect the small black plastic latches for cracks. Especially the rear one was known for cracking. Grab it and wiggle it to make certain it is good and solid. If both latches are good, I would begin looking for worn bushings or rollers around the transfer roller area especially if the copier has a lot of copies on it.
If you look at your earlier prints (where you are showing the cyan, magenta, and yellow) the magenta seems to have a "line" in the same area as the cyan. Well not really a line, more like some kind of difference. Not sure what this means but it may be a clue. Yellow is always hard to see anything on, but compare the magenta and the cyan.....there is something there.

Years ago I had a copier kick my ass with a line down the copy/print. It turned out to be a very small bit of hair that was just above the optic of the laser unit. I had to pull it out with tweezers. So, you never know.

[tech51]

[Synthohol]

Re: c552 perfect 1st print then color misalignment from then on

can one bad LED on the erase lamp do it?

[JasonSBE]

Re: c552 perfect 1st print then color misalignment from then on

can one bad LED on the erase lamp do it?

You are probably on to something there. I recently had a similar issue with a C658 and it was the FRC board, which I do not believe is on this machine, but it should be easy enough to troubleshoot. Swap the erasure lamps for cyan and magenta and see if the issue follows the color.