Sharp 5500n CQ Problem

[techjay]

I get these 2 half moon marks on all my prints and I can't find were it is coming from. Here is the link to the pdf if anyone wants to take a look.
Also my reds come out orange when I print to the machine and unfortunately I don't have a color test print.

http://tinyurl.com/2b3zehp

Thanks

Jay

[blackcat4866]

In your attachment the mark are right on the edge of the paper. Which edge? Leading, trail, front edge or rear edge? Do the marks appear in the void area?

My guess? Lead or trail, yes through the void, and it's probably a gouged fuser roller. =^..^=

[OMD-227]

Too easy......

I see this all the time, on all MX machines.

You have a contamination under the primary transfer belt. Take the belt unit out, remove the cleaning unit. As you rotate it by hand, you will see the belt surface rise up a few millimeters at that exact spot where the contamination is. It will either be on the drive roller within the belt unit, or on the under-side of the belt surface. Judging by your sample, I'd say it would the under the belt surface as ther is no repeating mark on the same page (due to roller rotation distance vs belt rotation distance).
The contamination is causing poor cleaning of the belt at that exact spot. The small rise in the belt surface, causes that exact poor cleaning mark.
Most of the time, the hard contamination will be a very small ball of paper dust, which has rolled itself into a small lump as the belt is rotating. Other times, it will be an actual lump of hard toner.

The only way to fix this, is to remove the belt unit, remove the belt from the frame and clean all transport rollers & inside the belt bead/inner surface. If the belt is near-due for replacement anyway, its a good excuse to do the maintenance early.

This is very common.

[OMD-227]

As for your reds printing as orange, have you run a full color calibration over the machine, and what are all the maintenance/ddev/drum counts please?
If you get me that info, I'll tell you the best course of action. Whats the firmware version?

I look after a few hundred C-Dragons. I know how to tweek them pretty good.

[techjay]

Wow you really know your machines. When I go there later I will give it a try. I think the machine has the latest version of firmware. I think you sent it to me a few months ago via ftp. I took out the transfer belt but did not really know what to look for. Fixing machines for over 20 yrs I have learned not to mess with what I don't know unless I want to spend some money on parts.

Thanks

Jay

[blackcat4866]

You'll need to remove the transfer belt from the housing to look for foreign matter on the inside of the belt or on the idler rollers. Once the front cover is off the transfer belt unit, there are two screws to remove and it will scissors to allow you to remove the belt. wazza can provide much greater detail than I can. It's been a few years since I've seen one. =^..^=

[techjay]

Should I take the belt off?

[techjay]

Can I use Zinc Stearate on the tranfer belt or do I have to use kynar?

[OMD-227]

On the C-Dragons/Venus series, you must you Kynar powder on the belt and Stearic Acid on the drums.

The firmware has been upgraded a few times since that version you requested a while back.

You will need to take the belt off the frame (as I said earlier) to give everything a good clean/replace. If you miss even just one small lump of foreign material, the issue will still be there, just in a different spot on the page.

[techjay]

I got it, I will order some kynar powder from katun since I can't get it from sharp and take the belt off. It looks pretty easy. Thanks for helping I now its early their. They should make the firmware available to everyone it is really easy to install it and the last firmware you gave me solved a lot of problems.

Jay

[OMD-227]

You must be very careful with the belt once it is off the frame. It is very easily damaged. For example... as it is quite big, it tends to fold under its own weight, causing a bend mark on the belt surface. Once this happens, you might as well get a new belt kit, because that fold mark cannot be removed out of the belt surface. It will appear on every 4-5 pages.
Just be careful if you haven't done this before. Firmware being sent.

[techjay]

I would have never thought about that. I am glad I did not read your other post to carefully or else I would be buying a new belt.
If you ever come to NY you get a free dinner.

Jay

[OMD-227]

Well, a new Belt unit is always an option. It sure makes like easier when you have one of those.

I'll get over there one day. You are welcome Down Under as well anytime. I'll put some Roo on the barbie and have a fridge full of coldies.

[techjay]

I want to come over right now. Hope you have a better day then me. Great thing is my kids can't wait till I get home so that makes me happy.

Have a great day

Jay

[techjay]

Hi everyone.

I cleaned out everything and it seemed to go away and I got an extra 50,000 prints and then came back. I don't have a parts manual does anyone have the part # for the Transfer kit.

Thanks

Jay