Gain is greyed out on Navnet TZ3

[JHerb]

Gain control is in Auto but want to change to manual, can’t change as function is greyed out.
How to change this?

 

[Capt. Jack Sparrow]

Gain control is in Auto but want to change to manual, can’t change as function is greyed out.
How to change this?

Are you sure you don't mean RANGE is in Auto mode? Make sure you're not in AUTO CRUISE or AUTO FISH mode. Your set must be in MANUAL MODE to access GAIN