Canon IR2270 light copies

[mrfixit]

I was out at an ir2270 the other day for jamming and copy quality fixxed the jam and ordered parts for the light copies. They called back the next day with error code e024 toner sensor. Went out and replaced the transfer roller and the developer unit, this got rid of the code but the copies we're even lighter then before. I cranked up the dv bias and got it good enough that they could use it, The drum was replaced in September but I think it came from Katun, and it is using generic toner. I am going out tomorrow or monday with genuine toner and drum and hopefully the hole transfer roller assembly from another machine. Can anyone suggest anything else that might be causing this, we only have a couple of these machines that we service and any suggestions would be appreciated. I've included samples from after I replaced the parts, the 2nd one is a skyshot.
Thanks

[Rachid.Akli]

Re: Canon IR2270 light copies

Hello,

Make a copy, open any door during the cycle and have a look on the drum image. If the image is correct, you can conclude that the light copy is due to the transfer unit. If the drum image is light, start by replacing the toner by a genuine one. If the case is not solved, replace the drum and clean the laser.


Rachid.

[mrfixit]

Re: Canon IR2270 light copies

Every time I do that I can't get any image on the drum. I'm not a rookie here but thanks for the attempt. Pretty sure it's a toner issue but I want to take everything possible with me so it doesn't drag out all week and start pissing off the customer..

[Canon.Tech]

Re: Canon IR2270 light copies

What do the print outs look like? e'g print a jam history & P.G 3 test print. if they are OK they suspect a scanner issue.

If prints are also poor then yes the NON OEM toner & drum combo is most likely the issue.

When you replaced the developer unit was it new/empty? as if it was empty & there is now toner in it you toner the toner is being driven ok to that unit.

Can't see your sample pix!?

[DAG COPIERS & COMPUTERS]

Re: Canon IR2270 light copies

Ensure that the developing unit is making proper contact with the bias voltage.

[Brian8506]

Re: Canon IR2270 light copies

Sounds like you covered your bases but you've been around long enough. I would start with the drum. Theres toner in the hopper unit so thats gonna be more of a job if you try to get it all out but I think the drum, toner, or both will fix your problem. If you vacuum toner, dry wipe the cylinder before adding new.

[mrfixit]

Re: Canon IR2270 light copies

It was a new empty dev unit and the bottle turned and filled it when I ran the installation mode, ran it 3 times actaully. It's not optical because I made copies with auto rotation and they look the same either way the original was placed always lighter towards the rear of the machine. Sorry Rachid if my last post seemed rude, had a couple of drinks watching football and wasn't in a good mood when I was typing that, I do appreciate the effort.

[mrfixit]

Re: Canon IR2270 light copies

before doing anything.jpg


SCAN0071.JPG
SCAN0072.JPG
first skyshot is what it looked like before doing anything. since the dv unit code came the next day I'm guessing bad toner.

[Tricky]

Re: Canon IR2270 light copies

I'm guessing bad toner.

Skyshots that appear lighter down one side of the page are a classic sign of non genuine toner, another one being the toner can be rubbed off the page. this machine is very fussy when it comes to toner. A test print PG5 should be almost black all over.

The hopper can leak toner and this ends up on the laser, this area may also be worth a look.

[Rachid.Akli]

Re: Canon IR2270 light copies

It was a new empty dev unit and the bottle turned and filled it when I ran the installation mode, ran it 3 times actaully. It's not optical because I made copies with auto rotation and they look the same either way the original was placed always lighter towards the rear of the machine. Sorry Rachid if my last post seemed rude, had a couple of drinks watching football and wasn't in a good mood when I was typing that, I do appreciate the effort.

You're welcome. I've just tried to give a help.

Rachid.

[Herrmann]

Re: Canon IR2270 light copies

Did you clean the laser mirrors and polygon mirror thoroughly?
if not, please try this asap
If yes, i would go for HVT, because you said, you have changed all relevant parts... but this would not match with the uneveness IMO, if there would be an High Voltage issue, the print would be pale at all, not partially.
My bet goes for a laser issue

[COPIERTEC ASSOCIATES]

Re: Canon IR2270 light copies

Sometimes,new dev units can come with factory defects.Did you try to swap the sensor of the new unit to the old one and compare the results?
From the look of your skyshot copy,there is an un evenness on the dev cylinder.
Also try to make some adjustments thru COPIER>ADJUST>DEVELOP,to improve on the darkness of the copy.Good luck.

[mrfixit]

Re: Canon IR2270 light copies

Bad Katun toner, purged the system and put genuine toner in and it looks marvelous. Thanks for the help, wanted to make sure I had other things to try if the toner didn't do the trick.

[Brian8506]

Re: Canon IR2270 light copies

U da man!

[Canon.Tech]

Re: Canon IR2270 light copies

Let that be a lesson to everyone. Non genuine parts & toner cause so many issues!