[CQ] color issues

[Guest]

i have a canon IRC 3380 that can not line up the colors at all. I have replaced the lasers, replaced the processes unit , done a reg clear done a dc-con clear and returned to specs. cleaned the sensors .... running out of answers.

[vamoursly]

Re: color issues

Hello

Print out a PG10 and lets all take a look see?

V

[northernlife]

Re: color issues

auto color mismatch will fix color registration btw.

[JustManuals]

Re: color issues

This Parts & Service Manual can now be purchased for $12.77 and downloaded immediately after payment from:

http://www.justmanuals.com/canon-col...f-p-22997.html

Paul@justmanuals.com

[Rob Johnson]

Re: color issues

Hello

Print out a PG10 and lets all take a look see?

V

here is a pg 16

[Exceltech]

Re: color issues

I am working with Rob Johnson on this machine. It has had this issue many times over the last 6 months.
we've tried:
auto color mismatch
quick adj
full adj
level 2 reg-clr
entire new process assembly drawer
laser scanner unit
dc-con clear
we're looking at PDRM-EF-A PCB boards as a possible cause?

Thoughts?

[alex@wocltd.com]

Re: color issues

whats happens if you manually adjust image reg in svc mode?

had plenty that i have had to tweak that way.......

also I would have cleared mn-con as well

[Canuck]

Re: color issues

You have issues in main scan(laser) and sub-scan(ITB) directions. Replace the dcon(I certainly hope you have re-installed system software....latest version). If you have to tweak colour reg in service mode, then you have a problem. Colour density tweaks...ok....colour registration tweaks...a nono.....something is wrong. Patch reader should correct it. Check for a dirty patch reader. Personally i would slap a dcon in it

[Rob Johnson]

Re: color issues

You have issues in main scan(laser) and sub-scan(ITB) directions. Replace the dcon(I certainly hope you have re-installed system software....latest version). If you have to tweak colour reg in service mode, then you have a problem. Colour density tweaks...ok....colour registration tweaks...a nono.....something is wrong. Patch reader should correct it. Check for a dirty patch reader. Personally i would slap a dcon in it

thanks to all. Hey canuck, firemware is up to date. we did try a whole new process assembly and got the same result. Maybe we should try a new dcon..... Will let you know how that went.

[teckat]

Re: color issues

thanks to all. Hey canuck, firemware is up to date. we did try a whole new process assembly and got the same result. Maybe we should try a new dcon..... Will let you know how that went.

-----------------------------
I would focus on the sub-scan issue first
Sub Scanning Direction
The following is the sequence of operation:
1) When the print command arrives, the DC controller generates the sub scanning sync signal (PTOP) with reference to its internal timer.
2) The DC controller generates the sub scanning sync signals (Y-TOP, M-TOP, C-TOP, Bk-TOP) of individual colors based on the PTOP signal, and sends them to the Main Controller.
3) When these signals arrive, the Main Controller generates video signals (VDO Y, VDO M, VDO C, VDO Bk) a specific period of time thereafter, and sends them to the DC controller. As a result, the laser drivers of individual colors go on to emit laser beams that scan the surface of the photosensitive drum starting at a specific point.

PG10 =MCYBk horizontal stripe (sub scanning direction) Main controller PCB (main)







is the solenoid opening the shutters that cover the sensors.

[Rob Johnson]

Re: color issues

To all who made suggestions , thank you very much. Yesterday I went to the customer and replaced the two PDRM-EF-A pcb assemblies, and the DC Controller and made all adjustments. We have not heard from them since then . I am hoping that this is the end of this problem. Thanks again to everyone.

[teckat]

Re: color issues

To all who made suggestions , thank you very much. Yesterday I went to the customer and replaced the two PDRM-EF-A pcb assemblies, and the DC Controller and made all adjustments. We have not heard from them since then . I am hoping that this is the end of this problem. Thanks again to everyone.

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

have those boards checked by HYTEC --- hytecrepair.com
Hytec leads the market in circuit board repair.

[Rob Johnson]

Re: color issues

Thank you all for your contibutions. The last thing we did was replace the main controller and did all applicable ajustments.It still is not lining up the colors. We have decided to replace this machine. It is possessed!!!!!!!