I tried adjusting pot. Engine reset. Factory reset. No Sound
Light work OK. Couplers work OK. Speed is OK. Remote says engine starts up but no sound.
What should I look for next? Check speaker?
George
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Check the speaker, check the wiring from the speaker. The pot isn't in the picture for command operation, so it won't affect you running with DCS.
gunrunnerjohn posted:Check the speaker, check the wiring from the speaker. The pot isn't in the picture for command operation, so it won't affect you running with DCS.
If there's a broken wire on the pot there will be no sound in command as well. I know you can by-pass the pot by joining 2 of the 3 wires that go to the pot. If you do that then you have full volume in conventional.
Yes command over rides conventional but you can't have missing or broken wires.
I assume you've tried turning sound on & off, and tapped the up volume a dozen or more times???? Sometimes track signal test turns the volume waaaay down.
Gregg posted:gunrunnerjohn posted:Check the speaker, check the wiring from the speaker. The pot isn't in the picture for command operation, so it won't affect you running with DCS.
If there's a broken wire on the pot there will be no sound in command as well. I know you can by-pass the pot by joining 2 of the 3 wires that go to the pot. If you do that then you have full volume in conventional.
Yes command over rides conventional but you can't have missing or broken wires.
RU sure about this? It may start off no sound as the engine will look at the conventional pot setting for an initial read on what you want, but DCS over rides it and once in the system will use the last stored data. G
Note: Volume pot not required for command operation. Solder gray and red wires together to get full volume in conventional mode and insulate the blue wire from chassis ground. Page 21 If you don't join the wires there's no sound period.
This is right from the Diesel upgrade kit manual On MTH 's web site. I've done a couple this way.
Gregg, they say nothing about no sound in command in my copy the PS/2 diesel upgrade manual, same in the PS/2 steam upgrade manual.
In the PS/3 upgrade manual, they specifically state that the volume pot is not required in command mode. The comment of soldering the gray and red wires together refers specifically to full volume in conventional mode.
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I'm not familiar with ps-3... The only thing I know is... with a Proto-2 kit if you decide to by- pass the pot you have to join the wires mentioned above else no sound period. I only thing I can say is" try it "... I've done a few upgrades when the kits first came out. Why would MTH even bother to suggest joining the wires if it wasn't a requirement if one wanted to leave out the pot??
Give it a go or not at the next opportunity..
Gregg posted:gunrunnerjohn posted:Check the speaker, check the wiring from the speaker. The pot isn't in the picture for command operation, so it won't affect you running with DCS.
If there's a broken wire on the pot there will be no sound in command as well. I know you can by-pass the pot by joining 2 of the 3 wires that go to the pot. If you do that then you have full volume in conventional.
Yes command over rides conventional but you can't have missing or broken wires.
Might I suggest you refrain from making concrete statements when you haven't personally tested and determined the "facts". I'm sure you'll have a perfectly logical explanation why this locomotive starts up and has normal sounds in command mode. Perhaps the wires just have to be "close"? 
I'll say again, the pot is not in the picture in command mode, I think it's time to put this one to bed. My previous statements were correct.
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Hang on , You're saying this is a proto-2 board and you're getting sound with the wires disconnected as shown in your pic? If so I had it wrong...
Yep, I took those two wires off, powered it up in command mode, and did a startup. All was normal, no hint that the pot was completely disconnected. Obviously in conventional mode, I'd have no sounds.
Wow. Thanks for the info. I believed that was the case for about 10 years.... Sorry about the misinformation.
It's a bad when you don't learn something. I get a few pearls pretty much every day, this is one from the past. 
It's good to have sound in conventional for a reset using the transformer. You know, 1 whistle, 5 bells from neutral.
Joe, I don't think anyone disputes that, just pointing out how things work with the PS/2 boards.
Oh, I was just pointing out the need for sound in conventional for new comers that use DCS only.
No argument there Joe, I always hook up the pot too.
Back to the original problem. Checked the speaker. checked wiring harness from the 12 pin connector. Both OK. 3.2 ohms from the 12 pin connector. Next steps?
Audio amp. G
I think George has it, you probably need a board repair.
