[TG] [TG11] RL80C Plus system - all functions work but not at both MFDs

[Boblloyd]

Right you are Tom. The radar connects directly to the Lower MFD. I checked the upper MFD and the HSB had a terminator plug measuring 118 ohms. Looking into vacant MFD connector I measured 2.2 K ohms. Reasonable so far. However, when I measured looking into the cable end I measured 16 meg ohms, expecting to see 120 ohms. Pulling the panel on the lower MFD could see a DSM with a Y connector. The connector on one leg was coming loose. Awful access but I was able to reseat the connector but then I noticed the Y had a terminator going into the DSM. I don't think that's right so I removed it. Is that correct? Anyway everything works now on both MFDs. Pretty good for a 15 year old system. I'll upgrade soon but happy for the time being.
Many thanks, Bob

(10-12-18 01:32 AM)Tom - Raymarine - Moderator Wrote:  I'd suspect that radar is physically connected to the lower display and sounder to the lower. RL80C is a radar (+optional chart) rather than sounder display so if you're seeing sounder capability on the lower display and it definitely is RL80C (not L12x0C, for example) then that implies that you have a DSM250 sounder module connected to that display over HSB2 and that part of the network is working. If it's an L12x0 on the other hand then this can take a transducer connection directly, so nothing is proven about the HSB2 network.

Do you have a DSM somewhere in the network, connected via a Y-cable? the Y could be at the DSM or at the lower display.
Does either of the products that does not have a Y, have a terminator?

Tom