E-studio 650 density problem

[ToshibaTech]

Do the mag rollers have a lot of build up on them?

[ivovb]

Did you clean dev unit with vacuum cleaner and toner sensor installed? - bad idea. You have 80k good quality copies but anyway.

Check bias.

BR

[makaule]

Yes they were.. I cleaned them.. Now there is no developer felt on paper but problem with fogging still exists..

[ivovb]

I mean that using vacuum cleaner in dev unit with installed toner sensor might lead to failure of toner sensor because of an ESD. If You have another new developer I would suggest to test:
1. Change toner sensor (use this one from working unit) and new developer.
2. Make auto toner sensor adj. and 08-290.
3. Do test copies.

!!! Don't use vacuum cleaner in dev unit with installed toner sensor.

If this doesn't help You can simply back new developer in bottle and sensor and continue with other tests.

BR

[makaule]

I haven't vacuumed dev unit at all. Everything was fine untill tonner hoper was empty..
All day I was examining BSI notes in Webespos. Find one note about "image fogging when toner is near empty"
Note says that if fogging happens everything must be cleaned, then 08-445 must be set to 4 (less new toner added) and 08-446 to 1 (more recycled toner added). If new toner hopper is to the end there's almost no recycled toner in recycled hopper also - machine just asks for toner instead of "eating" it from recycled hopper and making "stress" for auto toner sensor.
As a reason - low quality paper was mentioned. As I understand, dust + recycled toner changed toner parameters enough to make a lot of mess.
At the moment quality looks fine.. Time will show if it was the root of my headache.. Let you know if smth..

[emujo]

There was a firmware update that was required to utilize these settings, was the MFP updated? EMujo

[makaule]

How can i check if it was or not ?

[Guest]

Developer is only ~80 K old.

So Look trust me!
Things do go wrong with new parts.
You said the other dev unit works fine from the other machine??
Put the problem dev unit in the other machine to see if you still have the problem??
Re dev it and fresh toner.
It will fix it.

[Guest]

I can feel little of developer on paper no brokens gears or smth else, everything's turning smoothly. Inserted dev unit from toshiba that is working aside and everything is ok. What can be wrong ?

LOOK you have answered your own question....

Inserted dev unit from toshiba that is working aside and everything is ok. What can be wrong

SEE!!!

[Claudio]

A preveous similar service call : I had an e-550 where the print kept washing out. We checked everything. Changed drum, DV, coronas, and eventually the customer would call back with the same problem.
In our case, we would run maybe 200 copies at a time and we would see the prints start to fade.
We then tried exchanging the toner hopper ass'y from a parts machine and tested it the same way and noticed the problem was solved. Something was wrong with the toner hopper. Even though you could see the toner ctg turn, it just was not adding enough toner. I never had to find the exact problem with that toner hopper unit since it came from a parts machine and I had to move on to put out other fires.
Try exchanging the toner hopper if you happen to have another machine to pull it from.
Good luck.

[makaule]

After changing 08-455, 08-466, cleaning everything and doing 05-290 copy quality looks great - fogging dissapeared little by little after ~200 copies. Thanks for your advices, i'll need them in the future..

[Oystercopy]

You will never, EVER get this machine to run right. It is a VERY poor system and the lack of solid blacks is only one of the many problems you'll encounter. Did you use an OEM drum, by the way?
OC

[farooq]

Hi,
i had a very similar problem with what you are facing. the solution was the area above the main charger (within the machine) was dirty and probably arching with the main charger. Take the drum unit out and clean this area properly. Restart and see if this makes any difference.

Farooq

[kunaraja]

try check the Dev TD sensor

[okawtech]

Owner/Tech

Another thing to check is the drum ground. Also check to make sure that developer is not bunching up and touching the drum. Also turn off the id sensor if you vac'd out cleaning unit but did not remove it, the static may have blown it out. Hope this may help.