Toshiba e-Studio 900

[Vesigoth]

This machine is showing a paper jam in the duplex (Z1 & Z2) but no paper in this area. I try to get into service mode (All Reset, 1,0,7, Stop. Because it looks like a Ricoh 2090 to me) and I can't get in. How do I get into the service mode on this beast? If you know I'd appreciate the help.
Thanks.

[KopyKat]

Clear Modes, 1,0,7, Clear (hold till screen changes)