HP Designjet 5000 Service Manual - Page 193
Colors are not as Expected, Bad Color to Color Alignment in the Media-Axis - ps driver
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NOTE Print Quality 1 Prints with completely white bands. n Check to see if the prints that the customer is trying to produce contain completely white bands. If this is the case, upgrade the Printer to the UV Firmware Release (A.02.XX). n As an alternative solution, advise the customer to put a line or border around the print. This problem is solved in any A.02.xx firmware release. 2 Improper use of crop marks. If the customer is using crop marks, this can be the cause of the length difference because the way the margins and the crop marks are implemented in the DJ5000 is very different from the way it is done in other Designjet products, e.g. DJ2000, 2500, 3000 & 3500. 3 Use of Coated Media when trying to get precise output. If the customer is using any type of Coated Media, Bond, etc. advise them to use glossy or polyester based films when the print accuracy is important. Colors are not as Expected If the Application or Driver settings are not correct, this could result in colors which are different than the one that were expected. n To have full control of the colors that are printed, use the CMYK option and no emulation (in Driver). Sending a file in RGB even with no color emulation could end up in undesirable results. If a Postscript file is not sent from a DesignJet 5000 PS driver, make sure you have the following settings in the Front Panel: Printer Setup Menu > Internal RIP settings > Ink Emulation > CMYK= Native. n As a special case, Adobe PhotoShop sends Pantone Colors as CMYK (no Pantone name). Therefore, Pantone Calibration does not make any difference. The file should be created as CMYK to prevent unexpected color changes. Bad Color to Color Alignment in the Media-Axis During Printhead Alignment, all the colors are scanned with both the Green and Blue LED's. However, some colors are seen mainly with one LED whereas some other colors are seen with the other (e.g. Cyan is seen with the Green LED and Yellow is seen with the Blue LED). If there is any misalignment between these two LED's, it will directly translate into the misalignment of the colors. The worst alignment errors are normally between Light Cyan and HP DesignJet 5000 Series Printers Service Manual 6-19