MPC6501 and MPC4501 fails ACC

[paulg]

Re: MPC6501 and MPC4501 fails ACC

You mention the strong light so one thing I have to say is have you done the ACC on some decent as white as can be paper? with a couple of sheets on top of the ACC sample to stop any possible marks from the DF or Platen belt showing though? I know its back to basics but with out a solid base you can't move forward. Some customers use paper which is thinner than ideal and you can almost see though it like glass.

The Optics does look dirty as others say is this room particularly dusty or ever had a major toner spill on either copier?
Are both optical units clean are all the mirrors clean no smears? Even now I see where fellow techs for some reason think its ok to use a Silicon cloth to wipe optics
What is the PM life on the major Items like Charge rollers, Drums and Devs, ITB and the cleaning units fellow Techs will play around with SP modes and get the colours looking ok and reset counters and all sorts of ingenious tricks but do what they need to and change parts so they can get out of a customers quickly. The colours don't look to bad but the copier will throw a wobbly at some point.
What is showing on the non Default data what has been changed?
Do the customers ever run ACC? If so do they know how to do and always do correctly?
Lastly is genuine and the correct Toner being used?

It may be a corrupted nv ram but best to just double check all the basics.

[Smee]

Re: MPC6501 and MPC4501 fails ACC

Heres an update - still not sorted.

Dont worry about the lines, theyre on our crappy workshop machine I used to scan it in. The real problem is it wont calibrate and the graduations are not even on the printer calibration sheets.

Teebee - thanks dude, youre awesome. The clear printer SP sorted out the uneven graduations...

But it still wont scan. I used the calibration sheets from another 6501 and it scanned and calibrated fine. So I dont think its a scanning issue - has to be the machine physically cant scan the page due to density or something.

All devs are way in their PM life but guess their the next thing to try.

I guess I had 2 problems that were kinda unrelated to each other but only occurred on calibating. One was the uneven graduations that Teebee sorted - and the other is unable to scan the pages that I hope the devs will fix.

[bjakobs]

Re: MPC6501 and MPC4501 fails ACC

Many good tips from fellow techs here

When it comes to problems with color calibration:

I see your scanned samples look kinda pale. Have you tried doing a forced toner refresh to spice up density before you did ACC? More often than not this has proved a success for me, but offcourse on the C6501 every success is but temporary

[rich2764]

Re: MPC6501 and MPC4501 fails ACC

Slow down tiger!!.... bad advice at this point.....

I go by experience and Ricoh's Knowledge base

[rich2764]

Re: MPC6501 and MPC4501 fails ACC

Heres an update - still not sorted.

Dont worry about the lines, theyre on our crappy workshop machine I used to scan it in. The real problem is it wont calibrate and the graduations are not even on the printer calibration sheets.

Teebee - thanks dude, youre awesome. The clear printer SP sorted out the uneven graduations...

But it still wont scan. I used the calibration sheets from another 6501 and it scanned and calibrated fine. So I dont think its a scanning issue - has to be the machine physically cant scan the page due to density or something.

All devs are way in their PM life but guess their the next thing to try.

I guess I had 2 problems that were kinda unrelated to each other but only occurred on calibating. One was the uneven graduations that Teebee sorted - and the other is unable to scan the pages that I hope the devs will fix.

Can you show a sample of what you have now from all of your acc pages? Clearing printer sp obviously sorted out your acc for 'printing' but not for copying as you have not done the entire clear as suggested in my first post.

[Smee]

Re: MPC6501 and MPC4501 fails ACC

All my ACC pages now look normal. Originally when I first went to the fault, it was only the printer ACC pages with the uneven graduations. The copy one was looked fine.

This is where the problem gets messy - there are definately 2 faults.

1 - the printer only ACC prints out wrong but the copy one looks fine (to the naked eye) - solved by clearing the printer memory with the SC code Teebee suggested.

After doing this and getting the machine to print the pages correctly, it still wont scan them and comes up failed.

2 - all calibration pages now look fine but scanning still fails. But it will scan another MPC6501 calibration sheets fine - so surely its not printing the pages correctly, although they look fine to me. When I put the 2 sheets side by side they look identical, although one always fails and the other always passes.

Has to be dev i think...but ive been wrong before!

[rich2764]

Re: MPC6501 and MPC4501 fails ACC

All my ACC pages now look normal. Originally when I first went to the fault, it was only the printer ACC pages with the uneven graduations. The copy one was looked fine.

This is where the problem gets messy - there are definately 2 faults.

1 - the printer only ACC prints out wrong but the copy one looks fine (to the naked eye) - solved by clearing the printer memory with the SC code Teebee suggested.

After doing this and getting the machine to print the pages correctly, it still wont scan them and comes up failed.

2 - all calibration pages now look fine but scanning still fails. But it will scan another MPC6501 calibration sheets fine - so surely its not printing the pages correctly, although they look fine to me. When I put the 2 sheets side by side they look identical, although one always fails and the other always passes.

Has to be dev i think...but ive been wrong before!

If you look at the black tiny arrow in the top left corner, each arrow is slightly different for each of the dpi printouts, ie the shape of the arrow determines which of the dpi resolutions have been printed. I believe that the machine scans this arrow to check that you are indeed putting the right one on the glass.
The one that does scan in, a) is the arrow identical in shape and b) is it in exactly the same place? Could you scan and mark each sheet accordingly which one scans back in and the one that does not?