have a Ricoh JP 1030 that keeps giving the jam indicator and clear jam on display. there is no jam and it may print 30 copies then give the jam indicator, or it may print 330 and then give the message. There does not appear to be anything blocking the path, and it will send the last copy through and then give the message. I have cleaned the rollers and friction pads, and adjusted and re-adjusted the tension spring and doesn't seem to be of any effect. Is there a sensor or sensors that may be going bad or need to be cleaned? ANY HELP ON THIS MATTER IS GREATLY APPRECIATED. THANK YOU!!!!!!