C300i - Color Cast on Scans

[mkonkelz]

Hi everyone,

i have a problem withy my scans having a magenta color cast. This behavior occurs randomly, maybe once out of 10 scans.
The whole document will have the color cast, it doesn`t matter how many pages, or which settings (resolution e.g.)

I attached two PDFs with one having the cast and one scanned normally as it should be:

45906

45905

Scanner: DF-714 DualScan
Firmware: AA2J0Y0-0100-G00-7B(00) - Function Version: 1.0

Settings are alle pretty much standard. No additional software installed.

[qbert69]

Hi everyone,

i have a problem withy my scans having a magenta color cast. This behavior occurs randomly, maybe once out of 10 scans.
The whole document will have the color cast, it doesn`t matter how many pages, or which settings (resolution e.g.)

I attached two PDFs with one having the cast and one scanned normally as it should be:

45906

45905

Scanner: DF-714 DualScan
Firmware: AA2J0Y0-0100-G00-7B(00) - Function Version: 1.0

Settings are alle pretty much standard. No additional software installed.Are your scan settings configured for strictly B&W or Auto Color Detection???[emoji848]

Sent from my SM-N950U1 using Tapatalk

[copier addict]

Hi everyone,

i have a problem withy my scans having a magenta color cast. This behavior occurs randomly, maybe once out of 10 scans.
The whole document will have the color cast, it doesn`t matter how many pages, or which settings (resolution e.g.)

I attached two PDFs with one having the cast and one scanned normally as it should be:

45906

45905

Scanner: DF-714 DualScan
Firmware: AA2J0Y0-0100-G00-7B(00) - Function Version: 1.0

Settings are alle pretty much standard. No additional software installed.


If you are duplex scanning does it show on side two?

[mkonkelz]

Are your scan settings configured for strictly B&W or Auto Color Detection???[emoji848]

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I always scan using auto color detection, so it shows on auto color. I don`t scan B&W.

[mkonkelz]

If you are duplex scanning does it show on side two?

I need to try this. The scans so far were only one sided.

Edit: It also appers on the original glass.

[Cyclops85]

Possible CIS asssembly or cable

[qbert69]

I always scan using auto color detection, so it shows on auto color. I don`t scan B&W.There ya go!!! Sounds like it is flip-flopping between b&w and color during auto detect...set to strictly b&w and see what kind of results you get!!! [emoji41][emoji1303]

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[qbert69]

I always scan using auto color detection, so it shows on auto color. I don`t scan B&W.Possibly a "white balance" calibration issue during auto color/b&w detect. There should be a way to adjust the sensitivity!!![emoji41][emoji1303]

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[Cyclops85]

I highly doubt that is a setting issue. It looks like CIS assembly or cable. We used to see this occasionally on the 8 series.

[mkonkelz]

Okay, i just tried scanning double sided. And it only shows on the 1st side(s).
So the DualScan CIS seems not to be affected.

Edit: Also it just appered on 4 separate scans in a row, just to disapper on the 5th one, without changing anything or moving the DualScanner.

[Cyclops85]

What about from the platen?

[mkonkelz]

What about from the platen?

It appears from the Platen and the DF.
When scanning 2-sided from the DF it`s only on the 1st page.
When disabling Auto-Color and scanning B&W only the problem seems to disappear (not sure yet).

Sometimes it`s up to 4-5 scan jobs in a row. Sometimes everything seems normal.

[Cyclops85]

Possible CCD or MFP board. Is the machine brand new? There is a security measure - press stop,1,1,4,4,C in service mode and you need to input the correct date and time at install. Sometimes if this step is missed it will give coloured backgrounding or lines through copies. Have you done this procedure?

[qbert69]

It appears from the Platen and the DF.
When scanning 2-sided from the DF it`s only on the 1st page.
When disabling Auto-Color and scanning B&W only the problem seems to disappear (not sure yet).

Sometimes it`s up to 4-5 scan jobs in a row. Sometimes everything seems normal.See if there is a setting to change auto color detection sensitivity!!! I have used other scanners, not just KM that when B&W is scanned in color, there will be a slight magenta cast which is related to the green sensor array in the CCD array!!! Make sure your glass & white balance strip are CLEAN!!! Check your auto detection sensitivity!!![emoji41][emoji1303]

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[mkonkelz]

Possible CCD or MFP board. Is the machine brand new? There is a security measure - press stop,1,1,4,4,C in service mode and you need to input the correct date and time at install. Sometimes if this step is missed it will give coloured backgrounding or lines through copies. Have you done this procedure?

It is brand new (1 week old).

I will try it out, but the system got set up by the dealer (it had the right date and time configured on delivery).

[mkonkelz]

See if there is a setting to change auto color detection sensitivity!!! I have used other scanners, not just KM that when B&W is scanned in color, there will be a slight magenta cast which is related to the green sensor array in the CCD array!!! Make sure your glass & white balance strip are CLEAN!!! Check your auto detection sensitivity!!![emoji41][emoji1303]

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Glass and strip are clean. I will search for an auto detection sensitivity setting and check it.

Edit: I am scanning color in color. It also appers on a scans with pictures and vibrant colors.

[qbert69]

Glass and strip are clean. I will search for an auto detection sensitivity setting and check it.Check the easy stuff before you start replacing parts!!![emoji41][emoji1303]

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[Albonline]

It is brand new (1 week old).

I will try it out, but the system got set up by the dealer (it had the right date and time configured on delivery).


you paid for a working unit, get the dealer to fix this!

[qbert69]

It is brand new (1 week old).

I will try it out, but the system got set up by the dealer (it had the right date and time configured on delivery).I'd be curious to see what the internal color test page looks like directly from the engine!!![emoji848]

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[mkonkelz]

I'd be curious to see what the internal color test page looks like directly from the engine!!![emoji848]

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Prints look fine, and also the test printouts from the service menu for color adjustment look great.

What test page do you mean?

[qbert69]

Prints look fine, and also the test printouts from the service menu for color adjustment look great.

What test page do you mean?Ok. Just making sure! Sometimes if D-Min & D-Max are not calibrated correctly, you can have weird things happen!!![emoji41][emoji1303]

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[Albonline]

this is a color detection issue, do the calibration adjustments if it still persists, most probably poor connection in the ccd circuit, could be ccd optical alignment, bent scanner, misaligned/loose dislodged mirror.

[qbert69]

this is a color detection issue, do the calibration adjustments if it still persists, most probably poor connection in the ccd circuit, could be ccd optical alignment, bent scanner, misaligned/loose dislodged mirror.Think Simple...B&W/Color Auto-detect threshold. Magenta background related to the green sensor in the CCD. I believe he said the magenta toning of the background was consistent across the page![emoji41][emoji1303] Remember!!! He SAID *AUTO-DETECT* was TURNED ON for SCANNING!!!

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[qbert69]

IF the paper you are scanning contains "Optical Brighteners" (additives to make the paper whiter/brighter, mostly towards the blue spectrum, sometimes fluoresing to some degree under a particular light source!!!) it's possible that with the scanner, it is picking up this reflective color cast and (mis)interpreting it as having a "background". In the case of LED's as a light source the color cast they exhibit is called "binning"...

A Look at the Past and Future of LED Binning - Lumenpulse (https://www.lumenpulse.com/knowledge/led-binning)

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[mkonkelz]

IF the paper you are scanning contains "Optical Brighteners" (additives to make the paper whiter/brighter, mostly towards the blue spectrum, sometimes fluoresing to some degree under a particular light source!!!) it's possible that with the scanner, it is picking up this reflective color cast and (mis)interpreting it as having a "background". In the case of LED's as a light source the color cast they exhibit is called "binning"...

A Look at the Past and Future of LED Binning - Lumenpulse (https://www.lumenpulse.com/knowledge/led-binning)

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The problem occurs with different papers. Also when scanning recycling paper and newspapers for example.

[qbert69]

The problem occurs with different papers. Also when scanning recycling paper and newspapers for example.Make a preset for newspapers with the bleed thru removal detect turned on!!! It's under the scanning application choices and should be listed as "Bkgd. Removal" or "Bleed Removal"...you will be able to adjust the amount of background removal!!!
https://uploads.tapatalk-cdn.com/20200612/416f616c29a39f426a2d4433e1781832.jpg

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[mkonkelz]

Make a preset for newspapers with the bleed thru removal detect turned on!!! It's under the scanning application choices and should be listed as "Bkgd. Removal" or "Bleed Removal"...you will be able to adjust the amount of background removal!!!
https://uploads.tapatalk-cdn.com/20200612/416f616c29a39f426a2d4433e1781832.jpg

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I have tried it with bleed removal and discoloration adjustment both turned off and on. It`s still the same.
My standard setting for both would be "off" / 0 Standard.

[qbert69]

I have tried it with bleed removal and discoloration adjustment both turned off and on. It`s still the same.
My standard setting for both would be "off" / 0 Standard.Have you selected and been using the "bleed removal" when scanning newspapers???[emoji848]

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[qbert69]

I have tried it with bleed removal and discoloration adjustment both turned off and on. It`s still the same.
My standard setting for both would be "off" / 0 Standard.Just sent you a PM so you can send me a sample via e-mail!!![emoji41][emoji1303]

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[mkonkelz]

Have you selected and been using the "bleed removal" when scanning newspapers???[emoji848]

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Normally i don`t use bleed removal, but for test purposes on this i did, and nothing changed.

[qbert69]

Normally i don`t use bleed removal, but for test purposes on this i did, and nothing changed.YIKES!!!...all MAGENTA?! ...were you trying to do a color substitution/color replacement test??? Looks like the M component of a C-M-Y Separation!!!...but you're just scanning and not printing?![emoji848]

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[mkonkelz]

YIKES!!!...all MAGENTA?! ...were you trying to do a color substitution/color replacement test??? Looks like the M component of a C-M-Y Separation!!!...but you're just scanning and not printing?![emoji848]

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Yes, printing is all fine. It only appears on scans.

[qbert69]

Normally i don`t use bleed removal, but for test purposes on this i did, and nothing changed.Color cast scanned image is showing a heavy magenta component where there should be none!!! The only "real" color components in the scan should be Red, Green & Blue, since the CMY is not introduced into the equation until print processing!!!

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[tsbservice]

Hi everyone,

i have a problem withy my scans having a magenta color cast. This behavior occurs randomly, maybe once out of 10 scans.
The whole document will have the color cast, it doesn`t matter how many pages, or which settings (resolution e.g.)

I attached two PDFs with one having the cast and one scanned normally as it should be:

45906

45905

Scanner: DF-714 DualScan
Firmware: AA2J0Y0-0100-G00-7B(00) - Function Version: 1.0

Settings are alle pretty much standard. No additional software installed.

7B firmware should be at Function Version: 2.0
I would try later special FW just for a good measure.
Strange problem. Don't think you can resolve it yourself even with great advices from techs here especially so intermittent and from both DF and glass. Claim it to KM dealership. Let us know.
Good luck.

[qbert69]

7B firmware should be at Function Version: 2.0
I would try later special FW just for a good measure.
Strange problem. Don't think you can resolve it yourself even with great advices from techs here especially so intermittent and from both DF and glass. Claim it to KM dealership. Let us know.
Good luck.Were you able to get a sample from him? He just sent me one & it looks like a color substitution/ replacement!!![emoji15]
https://uploads.tapatalk-cdn.com/20200612/c17506025e163647ec5a596aa69b82f5.jpg

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[mkonkelz]

I attached the sample to Post #1 :)

[qbert69]

Were you able to get a sample from him? He just sent me one & it looks like a color substitution/ replacement!!![emoji15]
https://uploads.tapatalk-cdn.com/20200612/c17506025e163647ec5a596aa69b82f5.jpg

Sent from my SM-N950U1 using TapatalkGreen is the direct complement of magenta...direct opposite on the color wheel....green ccd component missing...not being processed!!![emoji848][emoji15]

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[mkonkelz]

7B firmware should be at Function Version: 2.0
I would try later special FW just for a good measure.
Strange problem. Don't think you can resolve it yourself even with great advices from techs here especially so intermittent and from both DF and glass. Claim it to KM dealership. Let us know.
Good luck.

Would be great if someone could provide me a newer firmware to install.

When i can`t solve the problem i`ll call the KM dealer.

I think the chances are pretty high, that this is a software problem? No?

[qbert69]

I would check & re-seat all electrical connectors pertaining to the scanner connection!...that is, if you're a tech! Otherwise call a local tech![emoji41][emoji1303]

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[qbert69]

Get a local tech involved or the dealer it was purchased from!!![emoji41][emoji1303]

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[mkonkelz]

I would check & re-seat all electrical connectors pertaining to the scanner connection!...that is, if you're a tech! Otherwise call a local tech![emoji41][emoji1303]

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I am a trained tech, but that was a while ago. Nowadays i do a different job, but still maintaining my printers and MFPs by myself.

But if this boils down to be a hardware issue i`ll sure call the dealer. I thought this might be a known problem.

[tsbservice]

Would be great if someone could provide me a newer firmware to install.

When i can`t solve the problem i`ll call the KM dealer.

I think the chances are pretty high, that this is a software problem? No?

At this point my recommendation is leave it to dealer.

If you persist to attempt something maybe try FW in case of data corrupted.
For easy start change sw25 in system 2 to 10 equal function version 2.0 and reboot. I could help with FW monday.

Don't disassemble anything for now possible warranty voids etc. Any parts replacement must be at dealership expenses so they will want to troubleshoot/test/resolve it by their techs not you(customer).