PS2-5V Board Parts ID

Rod, I hope someone can help identifying these.  I would certainly be up for trying to repair one of mine if it causes trouble before deciding whether to spend more money to upgrade it.

@Vernon Barry posted:

Here is a shot from a PS2 5V repair topic https://ogrforum.com/topic/pro...d-2-5v-board-repairs

Again, that thread is https://ogrforum.com/topic/pro...board-repairs?page=1

@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.

@gunrunnerjohn posted:

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.

That's kind of how I read it too John. No, no chance of changing the large chips, that's for sure. I was just curious what they might be. I figured memory and the  main cpu. Thanks.