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Re: Copies have gray background.
Have you had the optics cleaned resently? If not Iwould start with that and make sure you have the copier unpluged and don't forget to clean the two mirrors under the Black Box/cover. It could also,mean that you need a new OPC drum and blade.. It depends on how maiy copies are on the copier and drum...
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if you are copying through the feeder check the small glass under the lid has not got any typex or ink stuck to it you check by placing a copy on the glass under the lid and do a copy here.. if no streaks apear then check the glass area.. also if you are printing to it and no streaks appear this area is the cause.. if it happens on teh print side too then you have a drum /dev wear issue and it may need replacing.
restart the copier while holding down the "0" and "5" keys. you will now be in service mode. enter "5" and press "start" key a number should show up in the display. this is the exposure value - how dark or light the copies will be. 5 is the automatic exposure setting. around 128 is the normal value. the larger this value the lighter the copies are - the smaller the value the darker the copies.
Enter a new number (exposure value) and press the "interupt" key to save the value. Restart the copier and check what the copies look like. Keep adjusting until it looks good/better.