I chatted with my partner who has replace several 11880 heads over the years. The problem with the rank ID number is two fold. First, not all the numbers/letters are used, and you don’t actually use 42 consecutive characters and the 42 correct characters are not a logical set of 42 in a row. In the service manual they provide a diagram of how to determine the actual 42 characters that should be entered. I’ve attached a photo of the diagram. This is indicated in the original post so I assume that part isn’t the problem.
Secondly, because the printing is so small it’s really hard to tell the difference between a 0 (zero), an O (letter), and the letter Q. He says he takes a picture of it then zooms in and that helps, but even then 0’s and O’s look almost identical. It often takes him several tries to get it all entered right.
Hope this helps.
Edit; in looking at the original post, I do think you are using some incorrect numbers. You have as your third line TTUUTSTR, but according to the diagram, that last R is one of the excluded characters. you don’t use the last character in the 3rd, 4th, or 5th line.
Based on what I’m reading from Epson, the code would be
DEA30064
VD00SS
RRTTUUTST
000000000
URTSUUSRS
J
This assumes I am not mistaking 0’s and O’s, mixing up D’s with O’s etc because the resolution of the picture.
What is confusing is the statement “A 45-digit alphanumeric code is written on the ID Label. Use the first 42 digits for the head ID”. Yet in Epson service manual that isn’t the case.