Gradation in 6501

[levino]

HAi,
My 6501 prints are comiing like blured.The customer is complaining that is a gradation problem,what is gradation?In photographs the face was coming steps,like colors are not mixing(only in photograpgs and images not in texts)I was replaced drums,developers,chargers.adjusted color reg and auto gamma.I was calibrating using kotak control patches.
Plese help me to solve
thanks in advance
LEV

[sbillis]

try to calibrate with spectometer. not with kodak color patches.

do you have any samples?

[ni311]

After changing the consumables, did you follow the steps from service manual?

[random]

You need to adjust your gammas offsets

[levino]

Hi
this was my old post and after i cant get a chance to see the machine.now i got the same tone jumping in 6501 with ic408,i calibrated with spectrometer after replacing the drum,charger,developer,machine run only 1.5lac.from manual i found this can solve by gamma offset adjustment.How i can doit and whether it can solve.the problem is color from high side to low side is not smooth,it will be in steps

thanx from levi

[maccenterpc]

Check the second transfer roll or make adjustments to compensate for the second transfer. With software SW 1-0 ON, this setting appears in the paper setting on the main panel of the machine.

Then, adjust (adjust operation run) with four options. After, make calibration via Spectrofotometer I1

[levino]

Thanx Mac,
Ill try and come back,whether the gamma offset adjustment can create any other problem?
why the colorbands are appearing while printing the gray in color mode.If print from gray scale mode the colorbands are not appearing,but the gradation is not smooth.Is this the limitation of IC408 compare to Ic305.Which color set up will be better for the files with gray and color?Any problem in printing from PDF compare to coreldraw or photoshop?

Sorry lot of questions.Can help me please!!!!!

levi