I have a Toshiba 3500C with a copy quality issue. Does not matter if you do color, b/w, or single color, print or copy. The issue is toward the rear of the copier. In talking to our tech support, he said Toshiba has an issue with pulling developer. He had me stick my magnetic screwdriver in the waste toner area for black and I pulled up a clump of developer. He suggested replacing the developer. Well, I did. Problem still there. If you rub paper on the area of the copy with the problem, you feel the grit, which seems like developer. If you stop the copy before fusing, you can see it on the paper. Once it goes thru the fuser, it seems to magnify the issue. Rubbing the problem area of the copy, after fusing, you can rub off some of it. Not familiar with Toshiba, but very fimiliar with color. Anyhelp would be greatly appreciated. I have attached samples.
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Re: Toshiba 3500C
So is it just black or all colors?
Did you change the drum along with the black developer?
did you reset the counter?
Is there a service history? -
Re: Toshiba 3500C
I have seen stuff like that. It looks blue, I would check that corona and clean it. Probably all need cleaning. Also I have seen something loke that when the transfer belt aluminum roller is dirty. It is the roller that the belt wraps around. When you look at the belt with the side door open run your fingar along the roller the belt wraps around and you might feel bumps under the belt. That is toner buildup on the roller. I would check the coronas first.Comment
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Re: Toshiba 3500C
Take apart the black main charge and clean it. While your at it, replace the grid and corona. Its shorting out.
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Re: Toshiba 3500C
Speaking of while you're at it, might wanna check ya cyan drum unit, or EPU as Toshiba call it. It's kinda hard to see the distance of the repeating image defect from your scans. Run code (04) 237 for each individual colour on A3 and you should be able to determine which EPU is you problem.
Also, cleaning the facing roller inside the transfer belt is a must on these machines, as mentioned above and use some conductive grease (not cheap, I know) on the primary transfer rollers contacts while its apart.I have not failed. I've just found 10,000 ways that won't work. ~Thomas EdisonComment
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Re: Toshiba 3500C
Thanks to all for responding. The samples I sent were ran in 04 (219) for all colors C,Y,M,K,K4,CMYK. So it shows up on everything. Do all dev units contact the belt regardless of what mode your in? I noticed that when I replaced the black developer, the developer that was in it looked like half the amount that should be in it. But as mentioned, the cyan unit is next to the black. So when I inserted my magnetic screwdriver in the black hole of the toner waste collection bottle, it could have been cyan dev on the screwdriver. I have a manual on the way. Not sure how to take the belt off to access the roller on the belt unit. May need to wait until it gets here. I already had to replace a broken part I broke and had a time getting the Belt cleaning unit back in. Will try your suggestions. There is no service history with the machine. Could be this is the first call. We took over service from another company per the customers request. As of right now, all I changed was the Black developer. Thanks again for your response. Will let you know what happens. If you think of anything else you feel I should know, please post it.Comment
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Re: Toshiba 3500C
Like others have said, those models need cleaning quite often and the chargers will need cleaning. The grid and electrode are always worth changing to.It didn't say that I couldn't do it in the manual.Comment
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Re: Toshiba 3500C
Thanks Michaelc. I plan on returning when my manual arrives. I will most definitly use the information you and others have posted. Got to love this forum!!!!Comment
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Re: Toshiba 3500C
Before I go back out, need to know about cleaning coronas. The book says to clean the main charger case and contact points of terminals with soft pad, cloth, or vacuum. Nothing about needle electrode or grid. How and with what would you recommend I use to clean needle and grid? I assume these items are what you mean when you say clean coronas. Now have book and will travel.Comment
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Re: Toshiba 3500C
when you go back,check that the pcu`s have the modified filter(basically a black plastic strip with a filter in the middle).this was added to improve air flow around the dev unit and stop the dev migration.Also be very careful if you are dissasembling the coronas,as when you are removing the grid it is very easy to break the plastic peg that holds the electrode.the end block has also been modified to address this issue.post back if you need any part no.sComment
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What happened was the developer would be pulled onto the drum and then deposited in the cleaning system and into the waste tonerComment
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Re: Toshiba 3500C
That is happening. I put my magnetic screwdriver in the black hole of the waste toner container and pulled up a clump of developer. The call was for dirty copies/prints along the rear side of the copier area of the copy. About an inch wide, right on the edge, rear side. Its on there prior to fusing. If you take two copies and rub them together where the dirty is you can feel grit. Some will actually come off. The thing throwing me off is that it will do it on any color in mode 4 (219) on C, Y, M, K, K4, and CMYK. I'm pretty sure its developer. I replaced the black developer, but problem is still there. Take a look at my attachment. Maybe you have seen this issue. I have also cleaned the roller in the transfer belt assembly as mentioned in a post. Did not clean charge assemblies. Was not sure with what I should use being it has a needle. I cleaned needles with alcohol on Minoltas back in the day. Guess I will do the same here.When I stopped the machine and looked at the PCUs it has a film on them between where the transfer belt meets it, back torward the mag roller. On the black it had developer above the seal that run front to back above the mag roller, near the back. Any way, take a look at the attachments. Let me know what you think. This is my first Toshiba, although I have been doing color since color began.02-15-2012(2).pdf02-15-2012(3).pdf02-15-2012(4).pdf02-15-2012(5).pdf These are mode 4 (237). There is the mode 4 (219) attachment in my original post on this thread. Thank you for responding.
There is also a total counter page in the attachment on the original post. The report that shows the pm counts reads 20k on color pcus and dev, 48k on black pcu and 2k on black dev.Comment
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Re: Toshiba 3500C
I am drunk at the moment so bare with me. I will read the other posts when i am more sober. About cleaning the needle elcectrodes, they can be a pain. Best to change them with new ones as the needles can bend easily. If you are worried about snapping the pip on the charger terminal, loosen the screw on the front one. This takes some of the pressure off. Dave from toshiba taught me this (his fix/find). Never had a broken one since.It didn't say that I couldn't do it in the manual.Comment
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