How to change out a memory battery? Thanks Rob.
This is how how do it.
Acquire service manual. Call icom and order part number for mem batt.
They are usually a coin size lithium batt with 2 or 3 solder tabs.
Disassemble radio per service manual.
Desolder old batt and replace with new one.
Re-assemble and do a master reset on radio when powering up for first time.
Test memories by programming several and disconnecting power from radio
and let set for several days with no power to radio. If mems hold after several
days odds are the new bat is working.
Same procedure as any other amateur rig.