Sharp AR-235 dumping dev

[vlad_robas]

Hello agaian,
I don't have all record's about this machine but since i know it it had this problem. It has now 190k at about 100k sombody refiled cartridge then i was called, it had all developer gone thru all copier so i put a new dev and toner. Then afther about 10k was runing low on dev again so i changed the dev unit, but the dev didn't stop spreading thru copier so i go far and replace the drum unit and drum. Afther that quiet till few week's ago when we had to change the poligonal motor, i asked here about the code, and we see again developer all over the place. I have no ideea what to do next. I looked at the 8 values and they seem to be ok. Never done a firmware update on this.

In attachement is a printed document and it's back which has dev on it.

[blackcat4866]

The drum unit should have resolved this for you. The drum unit had a new primary charger, yes? That is what usually causes developer dumping on the Gazelle and Leopard series machines. It was more common on the Gazelle (AR-M208N), but in our case we had 5 Gazelles that were too small for the amout of copy volume, all in one building. Are you using OEM developer and toner? I seem to recall reading something about a problem with charge contacts on the door. Wazza, do you have any documentation on this? =^..^=

[vlad_robas]

I'm not 100% sure about the new charging unit but for sure i put clean one back then (i use to reuse them by washing-is that wrong?). The one that i changed these days was realy realy messy, there is smoking in the next office. Should i try to put a brand new MC and a developer?



PS. this is valuable, i got a reply from the master himself

[blackcat4866]

Before you change the developer again please run simulation 25-01. What value does it stir at?
I clean and re-string the wires on those charge units, but replace at 300k copies or when it starts to dump developer.

Yes, I would replace the primary charge unit and developer, and run simulation 25-2 and 24-05. What stir value do you get? I would expect a value between 90 and 110 for new developer. =^..^=

[mtech]

Check the springs on the right door. I had a lot of these with the same problem. Poor contact causes the developer to be pulled out over about 10-15K copies. There was a bulletin about this issue. I would also check or replace the transfer unit. Depending on the age of the machine, make sure the right door is not warped from fuser heat.

[vlad_robas]

The right door clearly it isn't closing very well and is making a bit of noise, forgot to say that ...

[OMD-227]

You guys are right. I know its an old bulletin, but it clearly says the issue is caused by the door or the electrode plate in the transfer roller unit.

Attaching a few images from the bulletin.

Hope this helps you.

[tmaged]

We use the 310MC main charge unit. Sharp eliminated some teeth on the ends of the saw tooth that was a cause of arcing. Good stuff here !!

[vlad_robas]

''wazza'' can u please find a better view of this buletin, i cant see the codes... and i don't want to order something that isn't need

PS my dealer sent to me a CD with some of the buletin's but this isn't there

[blackcat4866]

vlad,
if you vant to see the documents more closely you can download them to your PC.

Right-click on the document
Save Target As
browse to where you would like to save the document
Save

Now open the document in Windows Picture & Fax Viewer, and you can enlarge the image enough to examine every pixel.

You may have a different application to view .JPG files, but I think you get the idea. =^..^=