Canon CLC3200 printing out of focus

[jochenstacker]

Hi, I have a IRC3200N with color registration issues in the paperfeed direction.
Came across this thread and downloaded the procedure for sorting out the problem.
Started with removing and cleaning the ITB, cleaning the patch sensors, removed lasers and adjusted cam, cleared DC con and MN con.
Sadly the problem remains, the machine printed fine up to last week, then the color reg just went off and all my efforts have been in vain so far.
Are there any new procedure to follow?
As far as I can see the next step is to replace lasers/boards.

[charm5496]

ITB drive gears are huge problem with this issue. Also when you cleaned your ITB did you clean the drive rollers on the inside of the belt along with the inside of the belt itself. If it is coated with toner or dirt then it will continually slip.

Did you re-enter the data after clearing the DCON and MNCON? The MNCON has nothing to do with image registration, but your DCON does.

[teckat]

be sure to print out your P PRINTS> Before u do any type of Clear> those numbers that reset to default #'s need to be put back in from sheet prints >

Post a PG10 and a PG6 pattern so we can see the issue
This ITB sheet stretches over time/ when was last replacement ? The inside ITB black drive roller becomes slick
needs a good cleaning.


If issue is on one color>did u swap lasers to isolate the problem ??

this is the gear unit -charm5496 talked about
iR5180 ITB Rail.JPG

[teckat]

try this procedure below

too add/
found from old tech pub.
Pattern Reading Assembly
If Color registration is off by about 3mm's for all colors.
It only occurs in the paper feed direction.

When the pattern reading unit was unplugged the color registration was off and the machine did not produce any error codes.
Replace the Pattern Reading Assembly-FG6-8960-000

[D_L_P]

As far as I can see the next step is to replace lasers/boards.

I can't say that I've ever had to replace a PCB to fix a color reg issue. I think I would replace the entire ITB assy before going for a laser or pcb. I've seen 2 in the last month that I had to re-enter the values for:
Copier-> Adjust-> Laser-> LDADJxxxx

They should not all be set to 0.

[jochenstacker]

Hi,
I cleared Dcon and MN con because it was advised in the Canon document.
I re-entered the values into service mode from the P-print.
Will try to post a pattern later, the color reg is out by about 1-2mm per color, i.e. what should be a black line on the page is black, cyan, magenta and yellow, i.e all colors are out.
I have taken the ITB out and cleaned all the rollers and the inside of the ITB belt.
Not sure when ITB was last replaced. (machine on loan from other location)
I will try and swap the lasers today and have a look at ITB and drive again.

I had a look at the service mode, the only adjustment for laser is PVE-OFST, which on my machine is set to +2.

[jochenstacker]

Here is a P6 and P10 print of my 3200.

color reg sample.pdf

[jochenstacker]

Sorted!

According to a Canon UFO report the problem can be caused by a bad contact in a grounding plate on the ITB assembly.
I removed the ITB, gave it another clean and removed the plate (pictured), clean, re-insert, problem gone!

Solution.JPG

[teckat]

worked on over 1,000, 3200 models & I have never see that grounding plate cause a major paper feed registration issue that u posted.

[jochenstacker]

Me neither, I have had that color registration issue with a few 3200 I have worked on, normally clearing the DC and Main controller does the trick. The issue with the grounding plate was described in an internal Canon UFO report, the UFo database is an internal Canon bulletin where techs in the field post solutions to issues they have come across. Before that I have cleaned the ITB inside and out, removed the lasers and centred the cams, performed a clear and put all the values back in, re-seated all the connectors for the main controller, removed the sensor array at the back of the ITB and cleaned the sensors, performed a laser adjust (just in case) and actually repeated all the above steps a few times, nothing. After removing the main ITB drive roller, cleaning all the contacts and put it back in, perfect first time. I can't say a 100% it was that plate, but the first time I went near it, it worked. Happy days.

[charm5496]

Are you sure that your sensor array was sitting above the ITB correctly. I am with teckat where I have done thousands of calls on the 3200 and 5180 series and have never seen an issue with the grounding plate cause misregistration. Very odd....

[teckat]

customer-service.jpg

[mrfixit51]

Hi jochenstacker

In the diagram you provided, have you changed the gear #22 on the ITB. That is the one I have found to be most problematic. If you grasp the feed roller and try to turn the gear back and forth, there should be no play at all in that gear, if it does move, then you need to replace it. You will still have to clear up the misregistration after that...

[jochenstacker]

Hi jochenstacker

In the diagram you provided, have you changed the gear #22 on the ITB. That is the one I have found to be most problematic. If you grasp the feed roller and try to turn the gear back and forth, there should be no play at all in that gear, if it does move, then you need to replace it. You will still have to clear up the misregistration after that...

The problem is cleared up now, so no need for further action at this stage.

[mrfixit51]

Glad you were able to resolve it...