http://www.subirimagenes.com/o...-prueba-3282715.html

I updated the firmware and changed the transfer belt.Any idea?

Thanks.

kinda wierd but transfer belt. it wierd because the lines go in different directions.

I'd guess it's the internal density check pattern.

I had a firmware update change an important U100 setting from 0 to -130, leaving me with gray background on B&W pages. I would double check maintenance settings with the defaults in the manual, especially the transfer settings.

I'm guessing what your seeing is the color registration marks put down on the belt between copies. I suspect the reason that you're seeing them on the print is poor transfer belt cleaning.

Isn't this the series of boxes that had the cracked spacers on the DV units?

Naw, it was the original voyager series that had cracked dev spacers and it resulted in a different problem then what the OP is having.

I suspect firmware made some changes to the transfer belt cleaning values because after about a year or so of having these machines in the field they all started showing ghosted copies and prints. We had to go into U107 and change Belt Clean (A) to 80,80,80. For some reason after one of the firmware updates these values changed to 50,50,50 which was not enough bias to completely clean the belt. This was on the original Voyager series mind you, but it wouldn't hurt to check your machine if you haven't solved the problem yet.

Good luck!

check all the bushing in the dev units make sure they are not cracked,

Having the same issue. updated firmware and changed U107 belt cleaning(A) had all 60's changed them to all 80's and so far the problem is gone, i can only hope.

Have a C2520 that is having this problem. Very intermittent but when it does print the diagonal marks it may or may not include the patches toward the center of the belt. Because it was close to PM, performed 300K PM with kit and even replaced the transfer belt cleaning drive pack on the bypass drive assy. Problem seemed to go away for a month and now it's back, but apparently only on printed images or internal reports. Customer says copies thru feeder and/or contact glass don't have this problem. Checked the bias connector in machine to belt assy and all is ok. Traced the wiring back to HVPCB and connection is good. When you perform the auto gray adjust, the first print out that you place on glass is OK. The second print out with the two red squares has the cleaning residue to the center square patches on each time you try to perform auto gray. On occasion, you get the center patches and the diagonal lines together, but more often than not, just the center brownish smears of the center patches. Now, we're thinking logic issue. Anyone seen this problem??? We checked Sim 107 and all are defaulted to 90.

I talked with COHAS about his problem and his ended up being that another tech had put in a drive pack, although I am not sure which one but I believe it was also the transfer belt drive pack, and he ended up leaving a connector unplugged. I believe the connector had something to do with the cleaning bias signal for the transfer belt. If you where in the same area replacing a drive pack, I would double check all connectors for proper seating or pinched, damaged wires.

Machine is in the shop now still exhibiting the registration marks and patches on the transfer belt. Have removed belt assy and removed transfer cleaning drive and connector for transfer bias and found no pinched wires or anything disconnected. The contact assy itself is fine as I removed it and inspected it. Ohmed it out so as to make sure no break in wire, etc. When you perform gray scale adjustment, first test pattern comes out fine, but second pattern will have patch residue on it and/or complete registration pattern on it at times. As the dev units and drums are all new, starting to look like some type of logic issue. Updated the firmware to the very latest and still no difference. This machine will do the same thing each time you try to set up the gray scale adjustment. First sheet good, second sheet with two red block will have residue and/or patterns.

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Originally posted by neverlaughs:

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resolved the problem late yesterday with HV Board. The single white lead providing bias for the transfer belt assy even when disconnected gave me the same symptom. Replaced the HV Board and all is well. The engine board was switching at CNY9 but no cleaning bias for the transfer brush assy. It is a job replacing that board too.


Dealer Network Home DNet-KM.com DNet-KM.com In The Shop - Color Problem with KM-C2525E

I had the exact same problem on a KM-C3232 and was resolved by also replacing the HV transfer board.