Ir5000 repeating smudges at front end.........developer?

[mjunkaged]

Hey guys:
I am working on a Canon IR5000 and it's leaving a smudgy imprint about 15mm wide at the outside front, and tapers into a point on the biggest mark, which is followed by 2 or 3 shorter marks down the paper travel direction lead to trail. Did a panic stop (actually it conveniently had a paper jam) and it's definitely coming from drum/developer and not fuser unit. ALSO, it dumps a lot of toner onto the pf/fuser assembly at the guides to the right of the Trans/sep. corona. All the way across on the dumping, just the front edge on the smudge marks. I do NOT see the same smudges on the drum, and since it's repeating in a shorter pattern/length than the drum, tell me:
Am I looking at developer unit, or is some crap stuck to the drum? I'm thinking there's got to be a problem with at least the dev. space rollers since it's crapping toner.
I've read the posts about replacing cleaning blades, wires and cleaning /polishing the rather expensive drums.
Also, I need a service manual, if anyone can email it to me, PM me and I'll give up me addy.

[D_L_P]

Sounds like the Zebra stripes. That is from aftermarket toner mixing with OEM Canon toner. Use either all aftermarket or all OEM, switching back and forth will cause that. Completely vacuum out the toner hopper and developer

[mjunkaged]

It's monocomponent. So, no developer. NOT zebra stripe, NOT all the way across the page perpindicular to paper path travel. It's only on the front edge. As far as I know, no aftermarket toner either. But I'll check that when I go back.

[mr.daus]

please chek the cleaning drum unit,,
chek the waste toner cleaning drum on drum unit..

[vigour]

Empty the pretransfer unit, it collects stray toner, and dumps it out when too full.
The roller electrode on that unit may be caked with toner, causing your pattern.
If not, open right door,
remove screw to allow door to open wider,
remove 1 screw holding the plate.
Dev is now visible, unplug and inspect for caked toner.

you can look through that opening to see if there is anything on the drum.

[mjunkaged]

Thanks guys!

Thanks guys. Now I am armed to do battle with a bit more than a toothpick!

[mjunkaged]

Okay so I have a pic which I can't seem to upload to the forum but can email it to you, it's under 2mb. I went back and cleaned everything except drum cleaning station, since I never see the marks on the drum when I panic stop it. Also didn't empty out waste, it should tell me when it's full, correct?
Developer unit has over 1,000,000 pages on it according to service history, and drum replaced ~300k pages ago due to a scratch. I can not see the defect on the drum, but the drum has some nasty discoloration/banding at the front end, which doesn't show up on copies.
The spacing of the repetetive defect (only on the front 3" of LT-wide page) is equivalent to the diameter of the developer sleeve. Could it still be the cleaning station somehow? The customer has agreed to replace the dev. unit for starters. TO my eye, it looks like the spacer rollers on the dev. unit are SHOT, and it's rubbing against the drum @ the front. Yes? No?

[vigour]

Normal waste toner tells you when it is full.
There is nothing to tell you if the pretransfer collecting station is full. You must have seen it when you took the section wiyh the drum out. It sits about 5 o'clock , is held in by 1 screw, has a white plastic piece riding on a cam.

[mjunkaged]

Did that.

Normal waste toner tells you when it is full.
There is nothing to tell you if the pretransfer collecting station is full. You must have seen it when you took the section wiyh the drum out. It sits about 5 o'clock , is held in by 1 screw, has a white plastic piece riding on a cam.

I went back and cleaned everything except drum cleaning station (INCLUDING THE PRETRANSFER STATION)

[mrfixit51]

Pull the developer out and check it over, hand rotation of the mag roller may show you the problem. Since you mentioned that the registration area is getting dirty, there are only two suspects, the pre-trans corona asm, or the developer. Rip them out of the machine and inspect them for the problem...

[mjunkaged]

Wish I COULD upload the pic..

I have pics, they're under 2mb but the site won't accept them for some reason....I can email them to you if you really wanna see. I have cleaned pretransfer, and as I stated, dev. unit has 1.1 mil pages on it, and won't form a decent 'brush' at the front end of the roller, disks look shot, and I never see the visible defect on the drum AFTER cleaning cycle. All signs point to 'let's start with a developer unit' I think.
The drum is getting slight physical damage at the front. I know the SM says '1,000,000' for dev. unit, but precision roller says 500 k. I'd believe them before I'd believe a mfr. sm that was printed the day the machine was rolled out. The contact rollers look almost as small as the development sleeve. Lemme try to futz w/ my images and see if I can crop them to make them smaller.

[mjunkaged]

PICT0031b.jpg

See where I've written 'front'? Bottom is lead, top is trail. Do we all still agree dev unit? I have not printed an internal page yet.

[teckat]

Canon Manuf.ratings are based on 5/6% coverage on letter size plain paper/
u can not rely on that book info at all/

Precision Roller's one objective is to SELL PARTS

in windows
navigate to the folder that containing the pictures you want to send by email. Locate your photos or pictures, and right click on the picture or photo you want to send then choose “Send To” and then choose “Mail Recipient”. You will then presented with 2 options of either “Make my pictures smaller” or “Keep original sizes”. So if you want to reduce the size of pictures to send in email, just select “Make my pictures smaller” selected by default.

[mjunkaged]

Look UP.

[teckat]

Look UP.

thanks,see it now / now see this



imageRUNNER 5000 / 5000i / 5020 / 5020i / 6000 / 6020 / 6020i Black Blotch that Changes Shape and Position

Black blotch or spot that changes shape and position on the page. Image problem occurs from glass, DADF, internal reports, test prints and print jobs. The following image shows a sample of the disturbance.

the solution was to replace the Developer Unit. The Developer Unit had been used for over 1 million copies. All machines in this product series use the same Developer Unit with the part number FG6-5946-000.


Black images that appear to be shaped like bee's wax or corrugated cardboard.
could be due to arcing from the primary or developer unit to the drum surface.


Check: Drum surface for deep scratches or gouges down to the substrate. Primary charge unit for excessive dirt or signs of wires arcing at the ends. Developer unit for bad bearings or damage to the cylinder.Developer bias HVT.