C6500 shadow bandings lead to trail

[Itsthepaper]

I have a new C6500 in the field and I've replaced the coronas twice before its first 100k pm. Changing the coronas corrects CQ a shadow banding from lead to trail direction in random areas. I've done the intermediate belt assembly mob and firmware is current ver 30. Any suggestions .... Thanks

[random]

Without seeing a sample can't really say much. However I'm interested what is new in version 30 f/w. Can you fill us in?

[gully]

You could try cleaning the coronas with the tools inside the toner hopper.
It sounds like they're getting dirty quite quickly, i would check the filter out to make sure its not full of crap, or even if the fan is working.

[knightfall]

I would first clean the process unit entirely again, cmyk 1st transfer rollers and contact then check:
1. Dip SW 12-4 is set to 1 this improves gray balance
2. Dip SW 23-5 is set to 0 IP gamma correction
3. Dip SW 32–0 is set to 1 Uses Measured Gamma instead of Preset
do a printer gamma offset auto adjust, printer gamma offset manual adjust then an auto gamma adjust. Just a few things I would do.

Have you done the front and rear balance test pattern 53.

[knightfall]

for all who want the specs on ver 30 Im attaching pdf

[gully]

	Quote:			Originally Posted by knightfall
	I would first clean the process unit entirely again, cmyk 1st transfer rollers and contact then check: 1. Dip SW 12-4 is set to 1 this improves gray balance 2. Dip SW 23-5 is set to 0 IP gamma correction 3. Dip SW 32–0 is set to 1 Uses Measured Gamma instead of Preset do a printer gamma offset auto adjust, printer gamma offset manual adjust then an auto gamma adjust. Just a few things I would do. Have you done the front and rear balance test pattern 53.

Where did you get the info about 32-0, i've been looking around for extra stuff like this........

[Itsthepaper]

Thanks guys I'll try all those tips my customer is running 160k a week so it won't take me long to find out some results. I performed a 200K pm last week so I'll follow up soon.

[random]

160k a WEEK!! OMG what on earth do they print?

[Itsthepaper]

All those dip switch settings were already in place and filters were cleaned. I'll try to scan a sample to better give an example.

[Livebychance]

Try removing (discarding) filter in back of machine.