Reset the password on a Samsung ProXpress SL-M3870FW

This is how to access the Tech Menu in your Samsung ProXpress All-in-one multifunction printer, and reset the SyncThru Web service admin password, as well as perform a hard reset of the device's memory.
This works on the SL-M3870FW printer, but it may work on others. Worth a shot!
M4070FR/ SL M4070FR / M4075FR / M4070FX / M4075FX/ SL M4020ND / M4025ND / SL M3870FD / M3875FD / M3870FW / M3875FW / SL M3820 / M3825 DW / SL M3370FD / M3375FD / M3370FW / M3375FW / SL M3320ND / M3325ND / M3820D / 3825D / SL M2880FW / M2885FW / SL M2830 / M2835 DW / SL M2670ND / M2675ND / M2870ND / M2875ND / SL M2670N / M2675N / M2870N / M2875N / SL M2870FD / M2875FD / M2870FW / M2875FW / SL M2670F / M2675F / M2670FN / M2675FN / SL M2820ND / M2825ND / M2820DW / M2825DW / SL M2070FW / M2074FW / M2078FW / SL M2070F / M2074F / M2078F / SL M2070W / M2074W / M2078W / SL M2070 / M2074 / M2078 / SL M2022W / M2024W / M2028W / SL M2022 / M2024 / M2028