center of page is striped sides print perfectly,looke like lack of toner to center.Any ideas? eric.

Normal answer is to add toner if you can on that model. If not you would need to replace the print module. Playing to the angels Les Paul (1915-2009)

hi thanks for the info,I have recently replaced toner cartridges.Is a print module worth buying or just replace the whole printer they are getting cheaper all the time. regards eric.

From looking at the cartridge capacity of your model it appears it is a business class unit. Most new printers will come with only starter cartridges. Your cartridges have about 17,000 sheet capacity, which is a lot. If your cartridges and other consumables have a large percentage of capacity left that is worth some money and you need to consider that. As far as what the current problem is with your printer your manual should address that. OKI may still provide some tech support either by phone or email. They are your best resource.