Konica c650 Scanning Issue.

[Synaux]

This is a new machine (well, bought used), so I am not sure when this issue arose.
Anyways, on a full 11x17 scan the end of the scan gets a yellow/brownish corner. It only does this on hand placements.

See this scan (the brown section is from the end of the scan--the last portion of the platen to be scanned):
SKMBT_C65012041019140.jpg

I have cleaned and physically inspected all the relevant parts--there appears to be nothing amiss.
Due to a different issue the machine was reset in system settings. So it does not appear to be some weird setting from the prior owner(s).
Any ideas?
Thanks!
Nick

[morpk]

Re: Konica c650 Scanning Issue.

when you go into tech rep mode have there been any error log's in regards to the CCD unit ?

[Synaux]

Re: Konica c650 Scanning Issue.

when you go into tech rep mode have there been any error log's in regards to the CCD unit ?

I wrote down all prior errors upon arrival of the machine, and then reset it.

I have "S-1 CCD GAIN (1)"

"16.2 Solution
16.2.1 S-1: CCD gain adjustment failure
16.2.2 D-1: Split line detect
16.2.3 D-2: Read guide trouble
Relevant parts
Scanner assy CCD sensor unit
Image processing board (IPB)
Step Action
1 Correct the harness connection between CCDB and IPB if faulty.
2 Check for possible extraneous light and correct as necessary.
3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty.
4 Correct reflective mirror of the scanner if faulty, or change scanner.
5 Change CCD sensor unit.
6 Change IPB."

I can look into D-1/2, soon.
However, the error has not been replicated after the reset (after a month or so of usage)....I just noticed a
"p-14 Skew correction trouble (1)"
aside from that, no other errors.

Thanks for replying!
--Nick

[morpk]

Re: Konica c650 Scanning Issue.

So if i'm reading this correctly those were the error's in the machine you have now reset them to have a fresh look,
if you were to walk up and use the copier right now that is the output you would get and no error would be recorded correct ?.
do you have parts available to you?, for some reason my gut is telling me i would change the CCD unit prob a f*ck colour filter but IPB is a quick change so maybe start with that if that doesn't work then change the CCD unit ?


also i'm sure you have check this put just putting it out there, this only happens on scanning right not printing ?

[Synaux]

Re: Konica c650 Scanning Issue.

if you were to walk up and use the copier right now that is the output you would get and no error would be recorded correct ?.

Yes, sans the p-14 error

do you have parts available to you?, for some reason my gut is telling me i would change the CCD unit prob a f*ck colour filter but IPB is a quick change so maybe start with that if that doesn't work then change the CCD unit ?

I have zero parts...I wish I did...

also i'm sure you have check this put just putting it out there, this only happens on scanning right not printing ?

Only on scanning

[morpk]

Re: Konica c650 Scanning Issue.

what happens when you do a B&W only scan ?

[mrwho]

Re: Konica c650 Scanning Issue.

Sounds to me that if the problem were the CCDs then the brownish area would be all along the scanning area covered by the damaged CCDs and not just on the corner.

It looks like a mechanical problem to me - check the mirrors, the carriages and the lamp and CCD positioning - looks like the scanner is bent or dislodged at that place.

[blackcat4866]

Re: Konica c650 Scanning Issue.

We came across something like this when installing one of those book copying rigs on a Sharp Whale series color AR-BC260. It required adding a different light source 2/3 with adhesive tape (it was super high tech). We soon discovered that the optics were very poorly focused, and the machine would no longer color calibrate in any meaningful way and had reddish brown background, getting worse the further you get down the scan. After two days of loud cursing, we ended up removing the book copying rig, doing the color calibration, then re-installing it. After many attempts at re-focusing the optics we finally got it to the point where you're at. It's reasonably focussed up to about 12" in the sub scan direction, after that gets a brownish cast.

That's my long way of saying that I think it's all about optical focus. Look for evidence of shipping damage, or some other cat-astrophic impact to the scanner. =^..^=

[Mr Spock]

Re: Konica c650 Scanning Issue.

one of the mirrors (i would guess 3) is about 1-2 mm out of alignment.

[Synaux]

Re: Konica c650 Scanning Issue.

We came across something like this when installing one of those book copying rigs on a Sharp Whale series color AR-BC260. It required adding a different light source 2/3 with adhesive tape (it was super high tech). We soon discovered that the optics were very poorly focused, and the machine would no longer color calibrate in any meaningful way and had reddish brown background, getting worse the further you get down the scan. After two days of loud cursing, we ended up removing the book copying rig, doing the color calibration, then re-installing it. After many attempts at re-focusing the optics we finally got it to the point where you're at. It's reasonably focussed up to about 12" in the sub scan direction, after that gets a brownish cast.

That's my long way of saying that I think it's all about optical focus. Look for evidence of shipping damage, or some other cat-astrophic impact to the scanner. =^..^=

I will look into the settings for focus when I get in front of the machine again. And I love your sense of humor and story =)

[Synaux]

Re: Konica c650 Scanning Issue.

what happens when you do a B&W only scan ?

Good question! I have no idea, I will report back soon

Sounds to me that if the problem were the CCDs then the brownish area would be all along the scanning area covered by the damaged CCDs and not just on the corner.
It looks like a mechanical problem to me - check the mirrors, the carriages and the lamp and CCD positioning - looks like the scanner is bent or dislodged at that place.

one of the mirrors (i would guess 3) is about 1-2 mm out of alignment.

Well...like have inspected everything quite thoroughly; nevertheless, you both may be correct. Konica made it much more difficult to get into the optics than necessary...looks like I might be in for a bit of a chore.

[907tec]

Re: Konica c650 Scanning Issue.

Just had this exact same thing happen on a C451. It is definitely the optics. There are a couple things to check, all related to the alignment of the optics and scanner frame. Firstly, make absolutely sure that each of the mirrors are installed correctly and are resting against the metal tabs on each side. I had to check my mirrors three times before finding one that was slightly out of alignment. Second, make sure that the mirror/lamp assemblies are installed correctly and evenly: follow the setup procedure in the manual, measuring the gap between frame and carriage. If you are still getting the shadow after carrying out these adjustments, check the platen glass. On one of my machines, the platen glass was unable to lay flat because of damage to the support frame. Remove the plastic covers surrounding the platen and take off the two retainer clips for the glass. Check to see if the glass "wobbles" or "rocks" while sitting on the scanner frame. On our machine, we had to completely remove one of the frame pieces that the platen rests on. After removing and hammering/bending the frame, the glass was able to sit level again.

TL;DR -
Your optics ain't straight.

[Albonline]

Re: Konica c650 Scanning Issue.

TL;DR -
Your optics ain't straight


this is the correct track. scope the optics out, there is someting out of wack. check the at the position where your image starts to change color. i've seen the 2/3 frame wobble during scans, and have seen both mirror frames bent by tech's pushing too hard on them while cleaning.

[Synaux]

Re: Konica c650 Scanning Issue.

Everyone, I greatly appreciate your responses and will act accordingly once I get in front of this machine.
It might be a week or two before I update again, but based one the info given I just might have the answer!


I just did not want anyone to feel I ignored them

[Synaux]

Re: Konica c650 Scanning Issue.

"The message you have entered is too short. Please lengthen your message to at least 2 characters."

My comment:
Please add a delete comment option! !@#$@#!$!@#$@! (or did I miss it?)