Black areas on copy

[Frankie4Fingers]

Hi guys,

I have a Konica EP1080 and recently it's started producing black areas over the copies. It seems to be an intermittent problem, sometimes (usually) it happens, sometimes it doesn't. I've tried cleaning everything up but no luck.

I've attached a pic of a copy it made of a blank white page to show what it does. It seems like the spacing between the dark bands down the sides of the page coincides with the circumference of the drum. These dark bands always come out on the page in the location shown, not anywhere else on the page.

Can anyone give me any suggestions as to what causes this?

Any ideas and suggestions would be greatly appreciated.

Thanks very much.

[ck1]

look like the drum faulty . Did you try adjust F3 or F5 ?

[Luther]

I would agree with CK1,looks like the drum might be gone, drum life was 55k and so was developer,if you use a lighter exposure setting do the dark areas get lighter?

[minimerlin]

I would look at the cleaning blade! The black lines look to be wiggley...because the blabe moves from side to side. If the blade is worn it cannot clean the drum correctly so you get the lines / dark area. The drum and blade usually last about 80k, but the blade can go off if it gets old! If you do change the drum make sure you clear the drum counter.

[Frankie4Fingers]

Thanks so much for the suggestions guys!

ck1 - I'm not a photocopier tech, although I'm probably half way there considering the number of times I've had to get this old clunker going, ha ha, and I've got lots of books about the machine . . . what is F3 and F5?

Luther - I haven't tried different exposures, I'll give it a shot and see what that does. What generally happens when the developer runs out?

minimerlin - you're right, now that I look at it closely, the black lines do seem to have a gentle wave to them that appears to be in phase with the drum rotation, so perhaps the cleaning blade is involved here. I'll check it out.

Thanks again for the tips everyone, any any more would be most welcome!

[ck1]

did you try adjust to lighter and see, if can improve try clearn the mirror and do the adjustment. drum life span how many k?? ( press stop 0 stop 1 then press 8 then see the pc counter how murch .PS drum life is around 70k )

[FlamemakeR]

i think it looks like a problem with the exp. Lamp. are the lamp clean ?
any drums running 200k copies.

but it is possible that the photoconductor drum is to old.

important

the mirrors / Optical Section must be kompl. clean then you can get the F3 and F5.

FlamemakeR

[Frankie4Fingers]

Ahhhhhh!

You guys are killing me!! What's F3 and F5? English please! Ha ha!

I really appreciate the suggestions, I've made a list of things to check and I'll tackle it this weekend. Please keep the ideas coming!!

I have no idea how many ks are on the drum, but it looks good to me!
Ha ha, I'll check out the ks as well.

Thanks again guys!!

[FlamemakeR]

F3 and F5 are the exp.Lamp GAIN Adj. over the Servicemode...

stop 0 stop 1 , 1 this ist the F-Mode

press 5 and Start , before you must take a piece of A3 Paper on the originalglas.

the Lamp-gain will be adjust form the machine.

at he end the hex-data on the panel shows you the gain. then the copy ist ok you can end this. then the copy are bad you can change the hex-data with the zoom +/- buttons

FlamemakeR

[Frankie4Fingers]

I see, thanks for that FlamemakeR. I'll try and give that a go.

Does that have the same effect as adjusting the brightness/darkness of the copy? But just changes it for the normal setting?

[FlamemakeR]

yes right.

here you adjust the normal position and it will be saved.

[gerhardd]

The copy is very faint. Looks like reverse charge from your drum, and paper seperating after image transfer. Maybe trie to replace the varister, and resistor on your transfer guide of your transfer corona.

Hope this helps.

[Frankie4Fingers]

Thanks Gerhardd.

That's actually a copy of a blank white page though. If you can see some faint writing on it it would be from something printed on the back of the page.

[FlamemakeR]

[Frankie4Fingers]

No I haven't but I will check that this weekend. Thanks.