[CA11] DSM30/Airmar/E120 Fault Isolation

[Chuck - Raymarine - Moderator]

mistertj,

Should the reported issue have occurred when the vessel was drifting or operating at trolling speeds, then it would appear that there is a problem with the DSM or the transducer. While second hand equipment can be a cost effective alternative for some applications, it should be noted that such equipment often comes with no warranty and should a problem occur with DSM (whether original purchase or purchased from the second hand market), Raymarine will not be able to repair it. The CP370 (new products carry a 3-year warranty when registered) has proven to be a very reliable sounder module for use in replacing DSMs which had been interfaced via Ethernet (SeaTalkhs / RayNet) communications to one's system. We typically would not recommend seeking a second hand DSM unless the DSM will be interfaced to a C-Series Classic MFD. In the end, the choice in how one will proceed in replacing failed products will vary with one's priorities and budget.