@Rod Stewart posted:Recently Vernon Barry posted this picture on another topic related to the 5V boards. It apparently originated from an earlier topic, but I couldn't find said topic. Just wondering if anyone can help ID the other numbered components please? The sound chip is marked. #1 is a 220uF elec. cap but I don't know its purpose. #2 and #3 look like crystals that reportedly can drift when hot. #4 and #5 are IC's but I don't know their purpose. #6 looks like it might be the directional motor relay perhaps? Any help is greatly appreciated.
Well, the cap is probably a DC power filter cap, that would be my guess. The crystal cans actually don't really drift if they're within their operating temperature range, that's probably hotter and colder than they'll ever be in your locomotive. The large chips are memory and processor, you're not really thinking of trying to replace those, are you? #6 is the relay without it's cover, it should be a black plastic square.
