C6500 red color problume

[muhammad.imran]

hi
dear all
i am realy in trouble i have problume with colors spacialy red its print orangesh. i tried every thing gamma adjustmeny,gamma offset, contone,
calibration,but there is no effect i hope u guys can help me to come out from this prob.

[Setright]

Try the printer gamma offset adjustment, the manual way. I bet the automatic adjustment has put in too much yellow.

[muhammad.imran]

red color

dear
thanks to reply but i hav been done this adjustment i reduse the yellow value even -50 and i increase magenta value and i checked it with diffrent adjustment values but still i foraway to perduce a red color and machine is still new 30 thousand print only

[Setright]

Okay, you need to think about replacing the gamma sensor. (It's part of the rail that also holds the colour registration sensors.)
Try doing a full calibration, with the ColorCal including the scanner, OR by using a spectrometer.
Then look at the graphs for each colour. If the lines flatten out toward max density, the gamma sensor is defective.

[HORSE]

Yes check the colour registration assy. This contains the Gamma sensor and the 2 colour registration sensors.

If the assy has an 'M' stamped on it with black ink this is the modified type....if the assy has a pink spot label then it has the old type Gamma Sensor and you will hav to replace it.

modified part A03UR79800

[totoro]

I agree, if your red is orange and your blue is purple then do as Setright and HORSE suggest.

[21043]

hello!

try to increase humidity in room.

for example, "tunr on" electric teapot with opened top cover and let water to boil out (about 1 liter), then wait 5 minutes and try to print red colour.

it realy helps with C500 pro and CF5001.

[HORSE]

hello!

try to increase humidity in room.

for example, "tunr on" electric teapot with opened top cover and let water to boil out (about 1 liter), then wait 5 minutes and try to print red colour.

it realy helps with C500 pro and CF5001.

I agree get the customer to boil the kettle for a nice cup of coffee while you change the gamma sensor....

[muhammad.imran]

RED COLOR

HI
guys thanks for ur reply i took gamma sensor, and registeration sensor assembly from 6501 i checked it with 6500 and i calibrate autocal but same color. humudity is already enough. one thing i noticed when run gamma sensor adjustment (auto) the cyan and magenta DC bais value only 240,238and yellow , black is 480,520

[21043]

already enough - how much?

humidity has to be not lower 40% - from my experience.

[copier skills]

c6500

I had the same problem. I calibrated using the es1000 and the colors came right in.

[noklasony]

C6500 red color problume

hi guys
i hav same problumes and i hav done all thing that u people discused .
i also increase the AC devloping bais(under process fine adjustment)
i already replaced HV board,and registeration assembly M type
but dears i still have same prob if people need more information please ask .

[noklasony]

red color

hi dear
i calibrate the engine and fiery also but problume still there .
one thing i noticed red color of test print 1 withh 255 yellow,and 255 magenta is also orangesh. i did all adjustment gamma,gamma offset,dot1, contone ,every thing i replaced HV board. so now can any one help me

[muhammad.imran]

red color

hi guys
this is me again after pause but still i hav prob. i did every thing that u people told me. i orderd to koncaminolta new M type gamma sensor assembly i replaced it and i run all adjustment gain but prob still there and i already mentioned machine internal test print red color also orangesh
sooooooooooo what i can do now can any one tell me pls

[Bizhub]

HI
guys thanks for ur reply i took gamma sensor, and registeration sensor assembly from 6501 i checked it with 6500 and i calibrate autocal but same color. humudity is already enough. one thing i noticed when run gamma sensor adjustment (auto) the cyan and magenta DC bais value only 240,238and yellow , black is 480,520

Firstly ensure that the machine is correctly setup and all drums devs etc are in good condition, then Calibrate with a densitometer and check the outputs. Konica-Minolta have admitted to me that red's can be problematic on c500 and c6500's