[Misc] Black Toner Printing Light - Imagepress C1

[victoryprinting]

What might cause just the black to be printing light on an Imagepress C1? I have some spare process units which I have swapped out, but they have no change in the lightness.

I had some heavy solids and there were some lines that were caused by the toner not distributing evenly in the process unit roller, perhaps something got caught. I was able to eliminate the lines, but now the black is printing light.

It happened right after I swapped out the process units. I changed 2 of the other colors (cyan and yellow), and they print fine. Just the black is light.

Just wondering what some potential causes might be so I can narrow down the cause.

Thank You.

[teckat]

Re: Black Toner Printing Light - Imagepress C1

What might cause just the black to be printing light on an Imagepress C1? I have some spare process units which I have swapped out, but they have no change in the lightness.

I had some heavy solids and there were some lines that were caused by the toner not distributing evenly in the process unit roller, perhaps something got caught. I was able to eliminate the lines, but now the black is printing light.

It happened right after I swapped out the process units. I changed 2 of the other colors (cyan and yellow), and they print fine. Just the black is light.

Just wondering what some potential causes might be so I can narrow down the cause.

Thank You.

--------------------------------



did u mess with any settings-----

check this setting

COPIER> ADJUST> COLOR> ADJ-K-----------make sure it is set to a positive

[victoryprinting]

Re: Black Toner Printing Light - Imagepress C1

--------------------------------



did u mess with any settings-----

check this setting

COPIER> ADJUST> COLOR> ADJ-K-----------make sure it is set to a positive

They are all at zero.

But the strange thing is: when I started the C1 up the next day, the colors were amazingly brilliant - just like before I had the problem. Same settings, same file from the RIP. Perhaps it needed a good night's rest like me!

The only other thing that I would like to inquire about is this:
On the copy, there are tiny spots K-C-M-Y spaced 1/4 inch apart. The series of 4 dots repeat at about the same length as the diameter as the drum. Would these dots be coming from the same flaw on the drum?

[teckat]

Re: Black Toner Printing Light - Imagepress C1

The Four Dot Marks reproduced on prints are a result of foreign object in the Developing Assembly, Drum Cleaning Assembly and in some cases, the Image Scan Patch Sensor.


The four dot marks can usually be resolved by vacuuming the Developer Assemblies, Cleaning Assemblies and opening and cleaning the Image Scan Patch Sensor.

See PDF on Color Dots and Marks

https://www.dropbox.com/s/xhtpnzq97xexy5y/34082.pdf?dl=0

[victoryprinting]

Re: Black Toner Printing Light - Imagepress C1

The Four Dot Marks reproduced on prints are a result of foreign object in the Developing Assembly, Drum Cleaning Assembly and in some cases, the Image Scan Patch Sensor.


The four dot marks can usually be resolved by vacuuming the Developer Assemblies, Cleaning Assemblies and opening and cleaning the Image Scan Patch Sensor.

See PDF on Color Dots and Marks

https://www.dropbox.com/s/xhtpnzq97x...34082.pdf?dl=0

Thank you so much for that helpful PDF. That is exactly what I am experiencing.

Just two more question before I dive into the C1.
1. Would the drum be damaged to the point of needing to be replaced, or might the procedures for cleaning possibly be sufficient to resolve the dots?
2. It references replacing the start developer instead of replacing the developing assemblies. I see starter toner online all the time and was never quite sure of their purpose. Would I replace the toner contents in the developer assemblies with the starter toner? I can see that my yellow developer assembly is getting contaminated with other colors - even printing a solid yellow comes out mustard-colored, so a change of that is in order for sure.

[teckat]

Re: Black Toner Printing Light - Imagepress C1

The starter developer already has small amount of toner mixed in , you follow procedure for developer change in MANUAL.

I hated doing this on this model.
At high end customers, we used to order the dev units, because of time and location of printer.

You need to inspect drum if spots are not moving.

[teckat]

Re: Black Toner Printing Light - Imagepress C1

See link or see message on starter change.


http://www.copytechnet.com/forums/ca...1-revised.html

Performing a Developer Change on the imagePRESS C1 or imagePRESS C1+/ Revised
Performing a Developer Change on the imagePRESS C1 or imagePRESS C1+

Publication has been revised to correct the procedure for Developer Replacement /see page six in pdf.

NOTE:
DO NOT perform INISET or INIT after replacing the Starter of the Developing Assembly. If INISET or INIT is performed, the initial value of the toner density signal will be set with erroneous data due to staining that occurs on the surface of the ATR Sensor.
The ONLY time to perform INISET or INIT on the imagePRESS C1 / imagePRESS C1+ Series is when the ATR Sensor Unit, and the Developing Assemblies (or the starters) are replaced at the same time.

iPRC1_C1+_Developer Change.pdf

https://files.acrobat.com/a/preview/7bfb2a72-787e-427c-bf5b-d43ace1c138b

[CANONNEW]

Re: Black Toner Printing Light - Imagepress C1

[QUOTE=victoryprinting;532363]

[CANONNEW]

Re: Black Toner Printing Light - Imagepress C1

The Four Dot Marks reproduced on prints are a result of foreign object in the Developing Assembly, Drum Cleaning Assembly and in some cases, the Image Scan Patch Sensor.


The four dot marks can usually be resolved by vacuuming the Developer Assemblies, Cleaning Assemblies and opening and cleaning the Image Scan Patch Sensor.

See PDF on Color Dots and Marks

Dropbox - Link not found

[zoraldinho]

Re: Black Toner Printing Light - Imagepress C1

Of course not.Link is from 2016.

[teckat]

Re: Black Toner Printing Light - Imagepress C1


update link

Four Scratch Marks Caused by the Pre-Transfer Corona and Four Dots Caused by a Foreign Object

Dropbox - Four Scratch Marks_Four Dot Marks_information.pdf

[CANONNEW]

Re: Black Toner Printing Light - Imagepress C1

update link

Four Scratch Marks Caused by the Pre-Transfer Corona and Four Dots Caused by a Foreign Object

Dropbox - Four Scratch Marks_Four Dot Marks_information.pdf

[teckat]

Re: Black Toner Printing Light - Imagepress C1

Hello my dear, in detail what is the problem or defect that causes the 4 dots in the drum, maybe it is the bushing of the unit developed by the wear generates filings in some. Roller and it is formed as strange objects? Or as they say above, place a discharge brush inside the drum for a greater discharge ..?

read the pdf on link


Canon Engineering may have the answer

poor environment
poor printer maintenance
lack of filter changes
third party toner/ starter developer and other
Hello my dear, in detail what is the problem or defect that causes the 4 dots in the drum, maybe it is the bushing of the unit developed by the wear generates filings in some. Roller and it is formed as strange objects? Or as they say above, place a discharge brush inside the drum for a greater discharge ..?