Light K tones not printing on C6500

[adeyemi]

The k prints 100% solid very well but lower percentages of k tones prints very light. You have to make it up to 60% to see any black print. The black is almost completely blank for lower percentages than 60%. The other colors are printing well. The IPB, K Write unit and Write unit cables have been replaced without any resolution.

[Phil B.]

The k prints 100% solid very well but lower percentages of k tones prints very light. You have to make it up to 60% to see any black print. The black is almost completely blank for lower percentages than 60%. The other colors are printing well. The IPB, K Write unit and Write unit cables have been replaced without any resolution.

were the colors calibrated? laser lens cleaned ?

[adeyemi]

were the colors calibrated? laser lens cleaned ?

Yes, Laser lenses were cleaned. If you mean calibration of the print controller, yes....i calibrated using the i-one calibrator through command work station, because i use IC408. The point however is that even the internal test prints that does not pass through the IC408 shows the problem.

[Desert Rat]

What else have you done for this problem? Were the drums, dev and chargers recently replaced?
I will usually check the Gamma sensor offset. Adjust the gain so you can see a 10% patch between
the lines. Check this adjustment in the book first. I will check this after PM's and if other quality issues
appear.

DR

[Synthohol]

you need to calibrate the engine first controller last.
follow the sequence you would do after a PM.