Image fault Kip.jpg
The initial call was on the Kip 3100. You can probably see that the print is 24 x 36 (or at least larger than any typical A3 MFP). There is background in blocks 18.5mm wide, the length of the image. The further to the right you get on the page it becomes a continuous halftone background. The first thing I did was to ask the enduser to print the image rotated 90 degrees. What do you know ... the blocks of background are the same size and interval, but rotated 90 degrees. And if one were to print from an outside source of documents there is no background. So the background is in the PDF, just not visible on the monitor. So the next question is: Where do these PDF's come from?
"Well first we print the image Ledger size on the Toshiba (eS2830C). Then I mark it up, and scan it back to my email as a PDF (on that same eS2830C). Then I print it at 300% on the Kip."
So we step through it. First the ledger print (which is clean, no background), then the markups with yellow highlighter. Then it's scanned back as a 300dpi, Printed Image original type, PDF. You can't see any background on the monitor at this point, but the 300% print shows it clearly.
First I noticed that the straight lines in the feed direction of the scans are not so straight. They start out straight, then at about 8 !/2" start to skew to the front. Then in the last 1" it jerks back to straight. That was simple to fix. The DF on the eS2830C was 1.5mm too high at the rear, and the paper was skewing past the slit glass, up to the end of the original, then correcting in the last inch. That also evened out the background so it was consistent edge to edge.
The scanner optics checked out OK, but I knew they would, since the copies looked fine. Only scans are affected. So here is where the manual came in so handy. I started searching the word "background" for some sort of a background adjustment in the service mode. There is a user adjustment for scanning background, but I'd rather change the default setting first. On the 50th occurrence of the word background I found: Image Quality Adjustment Scanning > Background Adjustment (Color) > Printed Image 05-1071. The default is 50, and the lower you set the value, the more background you remove. It was a delicate balance, since the enduser wanted to see the yellow highlights (as gray halftones of course, since the Kip is monochrome), but not the overall background. A value of 40 worked nicely after a few attempts.
I just thought that it was interesting that I started out with a print quality issue on a Kip, that turned out to be a scanner adjustment on a Toshiba. It was also curious that the background was not visible in the scanned PDF regardless of how much you enlarged it, yet was plain as day on a 300% print.
These are the fun calls. The ones that take you to unexpected places. =^..^=
The initial call was on the Kip 3100. You can probably see that the print is 24 x 36 (or at least larger than any typical A3 MFP). There is background in blocks 18.5mm wide, the length of the image. The further to the right you get on the page it becomes a continuous halftone background. The first thing I did was to ask the enduser to print the image rotated 90 degrees. What do you know ... the blocks of background are the same size and interval, but rotated 90 degrees. And if one were to print from an outside source of documents there is no background. So the background is in the PDF, just not visible on the monitor. So the next question is: Where do these PDF's come from?
"Well first we print the image Ledger size on the Toshiba (eS2830C). Then I mark it up, and scan it back to my email as a PDF (on that same eS2830C). Then I print it at 300% on the Kip."
So we step through it. First the ledger print (which is clean, no background), then the markups with yellow highlighter. Then it's scanned back as a 300dpi, Printed Image original type, PDF. You can't see any background on the monitor at this point, but the 300% print shows it clearly.
First I noticed that the straight lines in the feed direction of the scans are not so straight. They start out straight, then at about 8 !/2" start to skew to the front. Then in the last 1" it jerks back to straight. That was simple to fix. The DF on the eS2830C was 1.5mm too high at the rear, and the paper was skewing past the slit glass, up to the end of the original, then correcting in the last inch. That also evened out the background so it was consistent edge to edge.
The scanner optics checked out OK, but I knew they would, since the copies looked fine. Only scans are affected. So here is where the manual came in so handy. I started searching the word "background" for some sort of a background adjustment in the service mode. There is a user adjustment for scanning background, but I'd rather change the default setting first. On the 50th occurrence of the word background I found: Image Quality Adjustment Scanning > Background Adjustment (Color) > Printed Image 05-1071. The default is 50, and the lower you set the value, the more background you remove. It was a delicate balance, since the enduser wanted to see the yellow highlights (as gray halftones of course, since the Kip is monochrome), but not the overall background. A value of 40 worked nicely after a few attempts.
I just thought that it was interesting that I started out with a print quality issue on a Kip, that turned out to be a scanner adjustment on a Toshiba. It was also curious that the background was not visible in the scanned PDF regardless of how much you enlarged it, yet was plain as day on a 300% print.
These are the fun calls. The ones that take you to unexpected places. =^..^=