bizhub 601 jam code 1705

[Gulbadin]

bizhub 601 shows J 1705 jame code . and there is no paper in vertical transport door. it only copy from tray one and bypass tray now.i check another photocopier vertical transport door but same jam code. what could be the problem.

[GIUBOSS]

check the paper hold and transport, the unidirectional clutches, cleans the steel shafts and adds little grease to the one-way clutches or replace them.

[Gulbadin]

check the paper hold and transport, the unidirectional clutches, cleans the steel shafts and adds little grease to the one-way clutches or replace them.
i have checked both clutches on other machine work fine. also the conveyance door from another machine checked. i have checked the the M1 motor at back of machine. nothing works. i have also changed the wiring for this section.but it does not work.