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Itsthepaper
12-27-2007, 03:28 AM
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 :cool:

random
12-27-2007, 07:12 AM
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
12-27-2007, 11:09 PM
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
12-28-2007, 02:53 AM
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
12-28-2007, 03:02 AM
for all who want the specs on ver 30 Im attaching pdf

gully
12-28-2007, 11:29 PM
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
12-29-2007, 05:50 AM
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
01-03-2008, 11:28 AM
160k a WEEK!! OMG what on earth do they print?

Itsthepaper
01-03-2008, 08:27 PM
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
01-05-2008, 02:13 AM
Try removing (discarding) filter in back of machine.

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