CLC 1180 contrast problem

[rlr42173]

Hello I have a problem with the contrast on my canon clc 1180. In areas where there is gradual color change, like a shadow or a light reflecting off of a wall, the contrast is too great and appears shiny and void of any detail at all. WHAT CAUSES THIS! It drives me nuts. Any help would be appreciated. In the upper corner of the below photo and on the wedding cake on the left hand side of the other pic. This shows up on all kinds of origanals also, black and white and color, Thank you

[Guest]

QuoTE=rlr42173;102432]Hello I have a problem with the contrast on my canon clc 1180. In areas where there is gradual color change, like a shadow or a light reflecting off of a wall, the contrast is too great and appears shiny and void of any detail at all. WHAT CAUSES THIS! It drives me nuts. Any help would be appreciated. In the upper corner of the below photo and on the wedding cake on the left hand side of the other pic. This shows up on all kinds of origanals also, black and white and color, Thank you

[/QUOTE]

Well if you are a user. I would suggest you get serviced. There are a couple of things it could be.
1.Calibration
2.Developer
3.Drum
4.Corona
5.Optics, if you are scanning from the glass.

[rlr42173]

I am actually an in house tech

Thank you for the response.
I am actually an in house tech with mostly on the job training. I work on 6 of these clc 1180's total and various other copiers and printers as well. I have been doing this for about 7 years now. I have a fairly new drum, maybe 10k and the developer is still showing solid on my test pattern. I have a new grid and wires as well. I think cleaning the optics helped with this problem,
Let me ask you about another question. On this same machine I have a problem with enlarging. I cannot enlarge reliably past 150% on a consistent basis. The scanner lamp moves forward one time to scan the original, goes to the left side of the glass, or wherever the original starts, then it lights and just sits and does not move during the four scans, then the copy comes out strange colored and gray with color streaks through it. It also locks up the machine and I have to turn it off and then back on to reset it.
Any ideas on this.

[Guest]

Let me ask you about another question. On this same machine I have a problem with enlarging. I cannot enlarge reliably past 150% on a consistent basis. The scanner lamp moves forward one time to scan the original, goes to the left side of the glass, or wherever the original starts, then it lights and just sits and does not move during the four scans, then the copy comes out strange colored and gray with color streaks through it. It also locks up the machine and I have to turn it off and then back on to reset it.
Any ideas on this.

Try doing a CCD adjust.. Worst thing it could be, image processor pcb,or CCD.

[Oze]

Check the oil coating of the Fuser.
When these rollers dry out the symptom can be areas of light/dark.
Check the oil felt...if it's extremely dirty then turn it to it's second side.
As for the scan issue I've seen the image processor stop the CCD from moving so I second Screwtape's suggestion.

[zoraldinho]

If i understand, you must have to turn it off and then back on to reset it.Do you have any error code?

[rlr42173]

No error code when it locks up. I did a ccd adjust this morning, we'll see what that does. One thing. If I leave the lid up and have original recognition on and not center shift, the enlarging seems to work. Weird. I will re-post with results after further investigation.

Thank you for all your input.

[etep571190]

Hi. Let me try to answer both your problems.

The one where the scanner locks up is most likely the scanner driver pcb. Ive seen this several times. After you replace it clean the scanner rails and lightly oil them.

The other problem could be several things. I have seen something like this before, but this solution only applies if the issue occurs when coping photographs. Note: copies not prints. If so try taking a clear clean transparency and placing it between the platen glass and your photograph. When making the copy be sure not to apply uneven pressure to the backside of the original.

[mrfixit51]

No error code when it locks up. I did a ccd adjust this morning, we'll see what that does. One thing. If I leave the lid up and have original recognition on and not center shift, the enlarging seems to work. Weird. I will re-post with results after further investigation.

Thank you for all your input.

I have seen blob of whiteout on silver platen cause wierd things to happen,, that kind of popped up in my head when you said it worked ok with the lid up. You also don't want uneven pressure from the lid, I have seen glossy photos exhibit some strange effect from the uneven pressure applied by a dinked edge on that platen, (probably from pulling the lid down on a book or something...)

[rlr42173]

I don't think that it is the pcb, because I have replaced that and I have also replaced the motor as well. Like I said I get it to work when I leave the lid open.

As far as the other problem with the contrast. This is an all of a sudden thing, not something that we have been fighting for a long time. It did improve after I did the ccd adjust, maybe not perfect, but better.

Thank you for your reply.