xerox 700 077-220 error

[lion_heart]

Good day, getting this 077-220 pre-reg jam, would print about 10 sheets, then jam at pre point. there is a loud grinding noise seem like every time it tries to either pick up sheet or send it through the pre-reg. Noise happens on every sheet. Changed the whole registration transport assembly, same issue. wondering if the ONLY option can be the registration transport drive assembly motor or am I overlooking something? any assistance would be greatly appreciated. thanks

[lion_heart]

Giving an update. seems as if it has something to do with the duplexing, When I run a job at 300dpi and face up and not duplex seems to work fine. any suggestions? thanks

[adriansto]

Good day, getting this 077-220 pre-reg jam, would print about 10 sheets, then jam at pre point. there is a loud grinding noise seem like every time it tries to either pick up sheet or send it through the pre-reg. Noise happens on every sheet. Changed the whole registration transport assembly, same issue. wondering if the ONLY option can be the registration transport drive assembly motor or am I overlooking something? any assistance would be greatly appreciated. thanks

Yes you need to inspect the components from preregistration motor assy 7K98040.
Worn gears, coupler, etc