Soundstream Rubicon 1002

Here's a pic.


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Can anyone by looking at the schematic tell me what the purpose of R185 and R219 are? They are burned badly and out of tolerance.

They should read 5.1 ohms. One reads 2ohms and the other 9 ohms.

I have ordered new ones. I just want to know if they are old and have ran hot for along time, or I should be looking to see why they are burned. I have seen other resistors look burned from heat because of a long life of running hot but still within tolerance.