1820 Light Copies

[User Name]

The easyest way I found to get it right is to get f6-21 down 5 points, and make black copies in f3 mode, watching the "darkening" until stable( around 20 copies),and if not dark enough get f6-21 down some more,again watching the effect in f3 all black.(well I actually leave an inch or so of white at the leading edge to avoid jamming).When its ok, you dont have to do f8-09 again.
Th.

I will give this a try if or when the machine gets light again. Just to clarify, when you say down 5 points do you mean as in decrease from -15 to -20 for example?

Thanks for the tip!

[JVergin]

have had a couple of these machines do this. Even after doing a full PM and init everything, copies were dark then eventually turned very light. Check dev unit make sure everything spins as it should. We've had a couple bearings seize up and gears crack. Hope this helps.

[Logged-on]

I don't see these very often but as far as the F6-21 question is concerned, generally you want to go more positive to increase toner supply. So you should go from -15 to -10

[onetek]

My mistake, I meant to to go from like -20 to -15 so increasing the value!
Th.

[User Name]

have had a couple of these machines do this. Even after doing a full PM and init everything, copies were dark then eventually turned very light. Check dev unit make sure everything spins as it should. We've had a couple bearings seize up and gears crack. Hope this helps.

Looked over the dev unit very thoroughly and everything looks good.

I don't see these very often but as far as the F6-21 question is concerned, generally you want to go more positive to increase toner supply. So you should go from -15 to -10

My mistake, I meant to to go from like -20 to -15 so increasing the value!
Th.

Thank guys! The machine went light again and I went back and adjusted F6-21 until the copies where adequately dark. I'm very optimistic that the copies will actually stay dark now.

Once again, Thanks to everyone for the responses!

[MPM2140]

There is a Panasonic bulletin, # TI-H21-30...
The toner pipe slides in and cuts off toner supply and starves the dev... there is a part change.
Try pulling out this pipe. We had the same problem.

[User Name]

There is a Panasonic bulletin, # TI-H21-30...
The toner pipe slides in and cuts off toner supply and starves the dev... there is a part change.
Try pulling out this pipe. We had the same problem.

Someone else gave me this advice in an earlier post, I checked it, and it seems to be working fine.

Would you be so kind as to post that bulletin, please?

Thanks.

[Magebomba]

Your answer is the grounding of the drum unit. Take a paperclip and screw it to the frame on the back and bent the clip so that it rides on the flywheel. there is a bulliten on this as well I will dig up in the meantime and there is a kit but the paperclip will at least let you know if that is the problem. I have had about a dozen 1520/1820 do this. I almost gaurentee thats your problem! good luck!

[User Name]

Your answer is the grounding of the drum unit. Take a paperclip and screw it to the frame on the back and bent the clip so that it rides on the flywheel. there is a bulliten on this as well I will dig up in the meantime and there is a kit but the paperclip will at least let you know if that is the problem. I have had about a dozen 1520/1820 do this. I almost gaurentee thats your problem! good luck!

I already have that bulletin (thanks to this site) and the problem that that bulletin addresses is the E03-10 code (if I'm thinking of the same bulletin that you are). Besides, I already tried that as an act of desperation awhile back. It didn't help.

I ended up increasing F6-21 until the copies where as dark as they should be and I haven't heard back from them since.

Thanks.

[Magebomba]

ya thats the bulliten, although I have never seen the 3-10 code myself I have always had light copies, then i just ground it out to see if thats it. dang I hoped that was it >< Heres hoping you dont hear from them for years hahaha

[User Name]

ya thats the bulliten, although I have never seen the 3-10 code myself I have always had light copies, then i just ground it out to see if thats it. dang I hoped that was it >< Heres hoping you dont hear from them for years hahaha

I've also had it cause entirely black copies but it never caused the copies to be light. It's funny the wide range of problems a poor ground can cause.

Years? Ha, it's an 1820. It won't be years until something else goes wrong.