Need Help with NEC SuperScript 870 Laser Printer

Archived from groups: comp.periphs.printers (More info?)

My NEC SuperScript 870 Printer has developed a small problem with an
image dropout along the left side of the printed page. It is slight
but noticeable.

It is not a sign of low toner, as the toner cartridge was recently
replaced. Before I have to spend the money on a new photoconductor
cartridge, I'd like to try cleaning or other diagnosis of the problem.
Are there any experts here?

Other than pulling out the toner cartridge and photoconductor
cartridge, what else can I do to examine and/or clean the unit? Do
those printer cleaning sheets made by Kensington do any good?

Many thanks for any help you're able to offer.

- Earl