Definitely possible, but to my eye, I can't see anything that looks like bent metal, certainly no bumps or bruises to the carriage. Everything moves smoothly from end to end.
As far as I can tell, the mirrors appear to be straight across without any kind of skew, although when moved over closer to the CCD, where the artifacting starts, it's hard to get a look at what's reflected into the mirror.
Just to be certain, are all the mirrors glass inserts or are there polished metal ones? The one that reflects the exposure tube upward seems like it might just be polished metal because no matter how I clean it, it remains ever so slightly hazy.
Well, the lower right corner has a chip in it where it touches the clip, and there was some shards inside, so I don't think the top glass was replaced. The mirror assembly is somewhat free-floating and has some play up and down since it's only guided by the springy drive cables, so my guess is either falling off a skid, dropped to hard which caused the lamp to move hard enough to crack, or bouncing in transit. They didn't lock the scanner before shipping.
Is that a post you're referencing? I couldn't find anything on that, but if you're referring to the strip near the ADF (black one side, grey other) then that is fully intact. On the bottom of the main glass, the ruler's stickers are slightly yellowed and have some minor air ingress from adhesive breakdown, but nothing out of the ordinary for a 160K printer.
doesn't seem to be any play in the mirrors other than as a whole carriage.
As a last resort, I might dismantle my C220 and check how the assembly is supposed to feel in terms of how taught the drive cables are.
Also, in regards to shipping claims, this wasn't an option since, unbeknownst to me, the freight operator that the shipper chose was a "budget" operator who offered no insurance of any kind. In all honesty, if I had paid more for it, I'd be upset, but ironically the freight cost more than the printer and I only put about $100 of parts into it so far (pickup rollers, secondary paper path guide and exposure lamp, of which I got two since one got temporarily lost in the mail so the company shipped another) So all in all I'm way ahead in terms of value provided I can resolve this problem. This unit included a fully outfitted finisher with it as well (minus saddle stitch)
ADF scans and copies come out perfect, so there has to be something wrong with the movement of the exposure/mirror unit.
I'm not sure of how taught or loose the guide strings should be, but after performing the step in the service manual under mechanical adjustment the pattern had moved mostly from the top of the image (blue) to the bottom of the image (orange).
I did not re-wind the drive cables since I didn't remove the motor but this might be my next step unless anyone thinks it unwarranted.
Attached is an album of a bunch more pictures and videos too large to attach, maybe someone can see something that I'm missing as far as the optics go.
KM C360 Prismatic Artifacting - Google Photos
- Zoomed 110% scan - minor haze top and bottom.
- Scanner movement (video)
- Top glass lower right chip, doesn't affect the fitment/seating.
- - 6. Exposure/mirror assy. Best I could do with the odd camera placement on my phone.
7. Manual movement (video)
8. - 14. Various views of mirrors
15. - Mirror and exposure freedom of movement (video)
16. - 21. More views of mirrors.
22. ADF scan of 11x17 - result is perfect with no shadows. Some minor banding in print output (either a flat spot on a transfer roller, or magenta developer)
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