MPC 2051 with a sc 899 and need info on firmware version needed to update.

[sandmanmac]

i try to update using a supposed d104 FW WITH a B2215601S .fwu file but kept gettin E36 invalid file,
shouldnt it be a d104 or d105 file? reformatted sd card and tried 2 diff ones wth same issue
thanks

That's because you're trying to install C3500/4500 System F/W
Yes, most of the C2051/2551 start with D104/D105/D106 just like in your screenshots.
The Updated PCL F/W is D1065739H

[Sabbatti]

Automatic Update Procedure with Ricoh Tool:

Automatic Rico Printer Firmware Update (Tested on Rico MP C2051)

Sabbatti