Washed out autograd

[vamoursly]

Anyone seen this before?


Copies fine on single colour, but when I go to do an autograd it looks extremely washed out, drums are in life, according to service mode?

20131205134050_00001.jpg

[its_just_a_copier]

Re: Washed out autograd

First of all, what model Canon are you working on?

Second, Have you printed the PG10 from Service Mode to see if it is also washed out?

[vamoursly]

Re: Washed out autograd

Sorry IRC 2380i Will check that tomorrow

V

[Nutstar]

Re: Washed out autograd

replace the ITB.

[vamoursly]

Re: Washed out autograd

Hello

I have been doing some testing;

Changed the ITB - No change

Put in a known working image transfer assembly - no change

PG10 is washed out / similar looking to the auto grad

I then took the ITB and the drum to another IRC 2380i and they are printing fine, auto grad is solid;

I have taken a P Print, cleared DCON and reset the values in SM

For some reason I cannot alter some settings;

SM Lvl1 Adjust \ CCD \ 50-RG at present set to 65535 - 100-RG at present set to 65535 - 50DF-GB set to 65535 - 100DF-GB 65530

I am starting to think a DC controller issue? Any advice would be greatly welcomed?

Thanks as always

Vamoursly

[its_just_a_copier]

Re: Washed out autograd

Hello

I have been doing some testing;

Changed the ITB - No change

Put in a known working image transfer assembly - no change

PG10 is washed out / similar looking to the auto grad

I then took the ITB and the drum to another IRC 2380i and they are printing fine, auto grad is solid;

I have taken a P Print, cleared DCON and reset the values in SM

For some reason I cannot alter some settings;

SM Lvl1 Adjust \ CCD \ 50-RG at present set to 65535 - 100-RG at present set to 65535 - 50DF-GB set to 65535 - 100DF-GB 65530

I am starting to think a DC controller issue? Any advice would be greatly welcomed?

Thanks as always

Vamoursly

Well since your PG10 and AutoGradation sheets are washed out you can forget about any CCD settings... that's just off the glass.

What are your drum lives showing? Have you cleaned all the dust-proof glass for all colors?

[Nutstar]

Re: Washed out autograd

take out the drum units and make sure that the high voltage contacts are clean on both the units and in the processing unit.

[vamoursly]

Re: Washed out autograd

Hello

It is an interesting issue, definitely an electrical problem; fortunately for me its in my workshop and not at a client site

I have verified the drums and the entire image processing unit is working fine, put it into another IRC 2380i and tested it, working as standard.

Glass lasers cleaned thoroughly;

I will be going methodically through the print process and see were the issue is and will come back, as it is good to share knowledge.

My first plan is to see what actual image is being created on the ITB on PG10 / autograd and go from there

Vamoursly

[teckat]

Re: Washed out autograd

Hello

It is an interesting issue, definitely an electrical problem; fortunately for me its in my workshop and not at a client site

I have verified the drums and the entire image processing unit is working fine, put it into another IRC 2380i and tested it, working as standard.

Glass lasers cleaned thoroughly;

I will be going methodically through the print process and see were the issue is and will come back, as it is good to share knowledge.

My first plan is to see what actual image is being created on the ITB on PG10 / autograd and go from there

Vamoursly

=================================================

Be sure to check that the ITB Assembly is locked in and engaging correctly.

check that the Developer Assemblies are locked into position.
The machine may not display any errors codes for either assembly even though they are not installed properly.
When making copies the image is good on the ITB Belt but the finished copies are light or washed out.

the image is good on the ITB Belt but the finished copies are light or washed out.
Check the Bias Tabs on the ITB Belt assembly and the Secondary Transfer Roller. They may be bent or broken and not making contact. Repair or replace the contact that is broken.








When printing or copying all colors were washed out ,including test prints .
1-The correct paper type was registered to the cassette and auto gradation had been done.
2-Stopped an image of a pg10 test print on the itb belt and all the colors were there and had a solid density.
3-Checked the bias tab on the front side of the secondary transfer roller and the bias tab on the itb frame assembly.
The bias tabs were in good shape and making good contact.
4-Checked the secondary transfer roller rear bias contact and it looked bent.

After adjusting the rear secondary transfer roller bias tab the image on the paper would get better but would also fade in and out. After inspecting the bias tab more carefully it was discovered that there was a small crack in the unit.

Solution :
In this case replacing the rear Secondary Transfer Roller Bias tab (FC6-9452-000) resolved the issue.

[vamoursly]

Re: Washed out autograd

An update, as I like to see a conclusion, how many threads have you read and thought, well did that suggestion fix it;

Compromised / cracked front bias tab, replaced and now is working fine.

Thanks

V

[onlyinnewfoundland]

Re: Washed out autograd

The doors on the non-advance series are just brutal on some of these machines...always have problems closing them properly and the transfer/registration area is always all over the place.