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Bizhub C350 - Printing quality problem - Gaussian blur and fade out
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[QUOTE="Le Wins, post: 216822, member: 15076"] Some news I got some denatured ethyl alcohol so I attended to the cleaning of the transfer belt… but I got another issue. I can’t get out the transfer belt unit because replacing procedure for the transfer belt does not make any sense. The manual is showing something else on the picture compared to what I see in the unit. Also I found two versions (so far) of this manual but neither of them make sense. 1. I removed the imagine units, as written – no problem. 2. Removed the waste toner bottle – also no problem. 3. Removed the two screws on the sides of the belt unit – also no problem But as the next step there should be some release lock which I don’t see anywhere. (Compare the pictures) Other things: I checked the Unit life indicator (see the picture). I don’t know how seriously I should take indicator, in simpler machineries this kind of statistics can be fooled/resented/altered but I don’t know does it works in this devices. Accordingly to the service manuals I found 3 “typical faulty image” examples which are similar to my case, on pages 4-60, 4-80 and 4-97. The 4-60 mentions scanner/copier parts/issues, and because my problem affects printing also I exclude those solutions. The 4-80 mentions LED assy and imaging unit. The 4-97 mentions fusing unit relates problems. Fiddled with the fuse speed, either increasing or decreasing it but made no difference. By the way, changing the transfer belt unit would be a costly operation. In our country it goes around 450-400 euros, from china around 200 and if I want to change just the belt maybe around 70 euros. Which opens questions for me: Are the OPC inside the printer interchangeable? (Cyan with magenta or black for example…) Which parameters should I check for compatibility at transfer belts and OPC drums? Dimension of course matter but for example, is [URL='https://www.aliexpress.com/item/1000005364233.html?spm=a2g0o.productlist.0.0.4fe27fa8JzAUpg&algo_pvid=135ff9e1-00f3-42d4-8f75-6ca56d1fbc70&algo_expid=135ff9e1-00f3-42d4-8f75-6ca56d1fbc70-0&btsid=0ab6d59515922236635841567e0baf&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_']this belt[/URL] spare part compatible with my C350? According to [URL='https://www.ab-com.sk/transfer-belt-konica-minolta-c350-c450-c351/?gclid=Cj0KCQjwuJz3BRDTARIsAMg-HxWOt__mlQtuhI6B05NXHqQYc-f-yKyull4KmSLr342ep3lThlD-ynwaAhQHEALw_wcB']this page[/URL] C350, C351 and C450 uses the same unit with the same belt I guess. In a matter of laser printer I am a newbie, but I got some experience in repairing other electronic and mechanical things. Based on my experiences and the basic understanding about how the laser printers work I got some conjecture. I got no references to this blur issue but it resembles something which I imagine that can happen with magnetic fields and electric charges. The blur either appears between dense/thick/intense objects (like between letters) or around thick/dense/intense object which haves no white spaces inside. Because that, I guess whatever causes it, it is related to electrical charges/magnetic fields and the ability to hold them. It is like the problematic parts ability of holding the charge is decreased and because of that the charge flows/jumps away of the basic area, pulling some toner particles along with them. Is there any option where the voltage/charge level can be adjusted of some parts? I would like to fiddle with it. [/QUOTE]
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Bizhub C350 - Printing quality problem - Gaussian blur and fade out
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