1820 Light Copies

[User Name]

Hello everyone,

I have an 1820 that I just changed the developer on a few months ago and now 2,000 pages later the copies are gray/faded. I have another one in the field with the same issue. Not sure why these ones are doing it but I was hoping a real Panasonic tech would know what to do. I'm hoping a setting in F6 might help. Any suggestions are appreciated. Thanks.

[Luong Nam]

You must check developer. Sometime, It run out of developer. Developer go into a waste toner. You print a report of F5/F6 and check it.

[suckis]

Check also the toner support:
http://www.copytechnet.com/forums/pa...html#post15691

[User Name]

Check also the toner support:
http://www.copytechnet.com/forums/pa...html#post15691

I hadn't thought of that. Thanks, I'll check it out.

[User Name]

I checked the dev unit and toner support and everything seems fine. I also checked the drum unit (just in case) and that seems good too. I can't tell if the toner screw was stuck before I pulled out the drum/dev unit, but it definitely engaged when I put it back in. I used the "Manual add Toner" feature to force feed the machine toner until it was suitably dark. I don't know if it will stay dark yet, but I guess I'll find out in a week or two.

Thanks.

[jsw2k]

Just to be sure...you calibrated the T/D ratio, right?

[User Name]

Just to be sure...you calibrated the T/D ratio, right?

You mean F8-09? I did that.

I'm glad you commented because I was just about to bring this back up again. I can't keep the thing dark! It went light again a few weeks ago, so I took a working drum/dev. unit and installed it to eliminate that as the problem, but it didn't last either. I don't know what else to do!

[onetek]

Whats your f6-21 at?

[User Name]

Whats your f6-21 at?

It was at -15.

I decided to change the developer again (if nothing else, it'll buy me some time). After the recalibration F6-21 is at -11.

[onetek]

I often have to recalibrate those after a while. When you do f8-09, it gets calibrated with the mixture of toner+dev that you just poured in.When it gets toner from the toner cartridge, it sometimes loses calibration (different toner in dev mixture?)
Th.

[User Name]

That makes sense. It's weird though because the toner in the machine is OEM. Oh well, with the new developer it should last about 1000 to 2000 pages before it gets light again and if that happens I'll manually add toner until it's dark and then calibrate it again.

Thanks.

[tseto]

on the end of the dev unit there is a dog cam that connects to the drive cam on the frame side. the cam is spring loaded. the spring is too weak , often it would not pop out to connect with the drive cam. results in no toner feed. you can check this by looking at the toner feed hole. if this hole is plug full of toner, the toner is not being fed to the dev unit. make the cam is free and pop out properly.

[User Name]

on the end of the dev unit there is a dog cam that connects to the drive cam on the frame side. the cam is spring loaded. the spring is too weak , often it would not pop out to connect with the drive cam. results in no toner feed. you can check this by looking at the toner feed hole. if this hole is plug full of toner, the toner is not being fed to the dev unit. make the cam is free and pop out properly.

I checked that and it's working as it should, so I know it's not that. Thanks for the reply!

[User Name]

Like I expected it did get light again last week. I added toner until it was dark and recalibrated the dev. I can only hope that it stays dark this time.

[onetek]

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.