TEAC 260 station memory

[[email protected]]

I have an old Teac 260 that loses it's set station memories after
sitting a couple of days. Anyone know the circuit and how the station
memory is implemented since I can find no battery back up?
Dick

 

[[email protected]]

I bought the AG260 service manual which shows no memory "keep alive"
battery but only a 470 mF 10v capacitor on v001 and v002 of the
processor. Careful reading of the brochure states that "Memory
selections are held for 'up to a week'". That's not very long so maybe
the receiver is almost performing to spec! I wonder if increasing the
capacitor size to 4700mF would get "up to10 weeks memory storage"?
Dick