I have already done all you suggest so in frustration got the Toshiba service techo to call and he inspected the photocopier and agreed it was not a paper misfeed eventhough the E030 error code was showing . He opened the paper track thru the machine and found a loose paper guide and when tightened the error code went off. He thinks the loose guide may have been touching the sensor.
Thanks for your input.
He thinks that the machine will see met out as it has been used only half normal use.