Thanks: 
Likes: Agreed with the other techs. First one is either drum unit or transfer belt, swap a drum unit from one of the other colors and see if it follows the drum unit, if it does the drum unit is the issue. The second one looks like smutz on the scan glass.
Dislikes: 0
Agreed with the other techs. First one is either drum unit or transfer belt, swap a drum unit from one of the other colors and see if it follows the drum unit, if it does the drum unit is the issue. The second one looks like smutz on the scan glass.
Some feedback.
First machine cleaning optics seems to resolve rainbow lines.
Second machine I cleaned ITB and swapped black with magenta drums problem came back after day or two. Purchased ITB.
There's another third one meanwhile similar to second machine, swapped drums problem's gone on B&W.
New drum purchased.
Thanks to all for valuable suggestions and insights.
Easy to work with manual kinda liked it especially repeating errors gauge is very perspicuous and great idea to use green instead of week yellow for image troubleshooting, saw this also in Xerox.
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