Freddie - Can I suggest you call RayMarine
? As you know, RayMarine
insists that there are NO Customer repairable parts
on their units. Ergo they don't publish schematics or parts
lists. What they WANT you to do is send the unit in, they will evaluate and tell you what is wrong and what it will cost to repair. I think that is a REALLY POOR way to handle that. But that is what their policy is.
Sooooo ... Call their CS - INSIST that you want to know What part, and part number you have is, and what it would cost to purchase
from them (they may only have their internal part number available and so most likely couldn't get you an outside source number) Once you know what it is, you could possible shop it around - but I would suspect it wouldn't be that much more expensive to order from them.
They are NOT going to want to tell you what it is - they will claim that SOMETHING had to cause that part to fail (and they are right - but since you want to go it alone ... do it) and they will tell you it will probably fail because of the root cause. Tell them you have nothing to lose by attempting it yourself, and are they CUSTOMER Service