(3)
Disconnecting the battery harness with the power cord unplugged will lose the settings (e.g., calendar clock, voice messages, and received FAX data) stored in the RAM.
If you do not need to replace the battery ASSY but you will remove the main PCB in the following procedures, take out the battery ASSY from its supports and put it on the main PCB with the battery harness being connected.
NCU harness 2
Ferrite core NF-80
(*Provided on the FAX-8650P)
IV - 6