iR6570 Weired print out

[brianho80]

dear all respective expert,

IMG_0280.jpg
does anyone face this kind of issue before?

Things i have done as below but the issued remain the same:
1, change of Primary charging Unit
2, service drum units and vacuum all the toners in cleaning blade there
3, check connectors to confirm not loosen or torn out
4, adjust "density" ; "developer [200]" ; "potential controller [0]" or even run "toner-s"
5, change of magnetic cylinder

can anyone please advise me what to do or any proper procedure steps to trace the problem?

[Rachid.Akli]

Re: iR6570 Weired print out

Hi everybody

-It may be helpful to send the drum potentials: VLm and VDm after puting the PO control ON (PO-CNT=1).

-Is the developing cylinder turning and is it covered with toner?
----> Verify or replace the dev cylinder clutch CL1

-Verify the Bias connector.

- PO-CNT Use it to turn on and off the potential control mechanisms.

setting: 0: off; 1: on (default) 1

--->Then your potential contrl is off. It's better to put on.

Rachid.

[Gamut]

Re: iR6570 Weired print out

Spacing looks like mag roll issue but I had similar when the potential sensor went down, replaced pot sensor and all was good.

[brianho80]

Re: iR6570 Weired print out

Hi Gamut & Rachid.Akli,

thanks for the attachment & advises. i did turn the cylincer manually with hand, it seem ok with solid toner sticking it around.

may i know where to find the developer clutch?

yesterday i did try PO control to [1] but it seem not helping much.

also, i did replace my toners inside developer as advise by friend that might be toner issue but remain the same problem.

[DAG COPIERS & COMPUTERS]

Re: iR6570 Weired print out

Does the problem occur only in PRINT out? What happens when you try to COPY from the copy board glass, and through the ADF (stream reading)? Any image problem? If the problem occurs on all the three options then thoroughly check the functions of the following: Scanner lamp (if its lighting), CCD unit, Laser unit( check the laser power in COPIER>DISPLAY>MISC>LPOWER) if it's output when printing, if not try another laser unit, in a worse case scenario you may think of swapping DC controller/main controller.

[blackcat4866]

Re: iR6570 Weired print out

I'm not familiar with this particular model, but on previous generations of Canons the black ovals have always indicated primary charge arcing. The actual cause can be more elusive. I've seen this effect when a broken grid wire was contacting the drum, or when potential control was elevating the primary charge.

The close intervals of the pattern indicates to me that your primary charge unit may have a problem, or be incorrectly installed somehow. I'd take a closer look at the work that I've already done. =^..^=

[mramlawi]

Re: iR6570 Weired print out

Hello for all

i can see that the problem from the Cylinder try to change the cylinder or try it on other machine if u have another one




regards ,

[COPIERTEC ASSOCIATES]

Re: iR6570 Weired print out

I'm not familiar with this particular model, but on previous generations of Canons the black ovals have always indicated primary charge arcing. The actual cause can be more elusive. I've seen this effect when a broken grid wire was contacting the drum, or when potential control was elevating the primary charge.

The close intervals of the pattern indicates to me that your primary charge unit may have a problem, or be incorrectly installed somehow. I'd take a closer look at the work that I've already done. =^..^=

Try to inspect the primary charger connector,go to the HVT and check for any dry joints and perform a random soldering.As blackcat puts it,there could be a disconnection to the grid wire.

[brianho80]

Re: iR6570 Weired print out

Hi all thanks for the advise；

I did try copying from platern glass, the issued remain same but of cause with the image I copy.

Primary charging was replace last week, how can I know whether the primary charging is ok beside perform this Hvt in service mode?

[teckat]

Re: iR6570 Weired print out

Hi all thanks for the advise；

I did try copying from platern glass, the issued remain same but of cause with the image I copy.

Primary charging was replace last week, how can I know whether the primary charging is ok beside perform this Hvt in service mode?

Probably a Primary Grid Bias/ HVT issue----

Make sure the wires for the Grid and Developer bias were not mistakenly switched.
The Photo below indicates the correct locations.

GB.jpg

[Rachid.Akli]

Re: iR6570 Weired print out

Hello,

Try to send the drum potential values: Vdm and VLm. This will help us to have a better idea about the Primary corona propeties, the laser discharging power and the potential sensor measurments.


Rachid;

[brianho80]

Re: iR6570 Weired print out

Hi All,

i did another round check up today and i found that the blade above the magnetic cylinder as shown in below, the gap seem a lot between the cylinder and the blade. i dismantle this before while replace [cylinder], this blade with 5 screws can adjust up and down while tighten up and of cause i adjust the highest.

iR6570 DV.jpg

do you all think this will caused the the image like below after i did another round drum servicing?

iR6570 issue01.jpgiR6570 issue02.jpg

dear all guru, please advise!!

[Jamesu]

Re: iR6570 Weired print out

I shown your first image of the printout to someone more experienced than me on this model and right away he said "Dev unit shorting out"

Hope this helps a little...

[northernlife]

Re: iR6570 Weired print out

I got 2 cents on dev roller arcing against drum causing the toner splatters. ran into this same issue on the 5000's and only the dev cylinder change fixed it.

[livancicm]

Re: iR6570 Weired print out

Hi All,

i did another round check up today and i found that the blade above the magnetic cylinder as shown in below, the gap seem a lot between the cylinder and the blade. i dismantle this before while replace [cylinder], this blade with 5 screws can adjust up and down while tighten up and of cause i adjust the highest.

[ATTACH=CONFIG]14984[/ATTACH]

do you all think this will caused the the image like below after i did another round drum servicing?

[ATTACH=CONFIG]14986[/ATTACH][ATTACH=CONFIG]14985[/ATTACH]

dear all guru, please advise!!

yes. now buy new developing assy.