Low output 1982 Rhodes Mark II 73 key stage

[hogdog42069]

Hi, I have a few rhodes and my Mark II has about half the output as the other earlier models Rhodes, even when taken straight from the RCA jack. When I run the other Rhodes through the Mark II is it not as quiet.  I've replaced the RCA jack and all the electronics/ cabling. I've checked al the pickups and they are showing normal resistance all the way down. There are no dead keys and it plays normally except for the output level.

It's not so quiet that running it through a regular amp can't get it to proper levels, so it might just be how these models are. But does anybody have any thoughts on this on any changes that could explain this in these models? My only thought is that maybe some of these pickups, although are not dead, could be going bad and are affecting the overall output? But all the individual keys are similar levels and adjusted about the same distance from the pickup. Does that happen with rhodes pickups, or is it more like they're good until they are obviously dead?

Thanks