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Background - AC 6000 PS2 5V diesel 20-2265-1.  Purchased as new old stock. I did basic check and lube prior to putting on track. When first powered up, it made some strange noises and started to draw high amps. Powered down. I opened everything up and found pinched wires feeding speaker that may have had metal contact. I corrected that and replaced battery with BCR.

Now I am able to add engine to remote and operate in DCS mode except no sound; all other functions including lights, couplers, smoke and speed control work fine. I did a factory reset with no change. I downloaded a 5v soundfile and put that on engine. Again no change.

My question - is the PS2 board set bad or is there something else I should try?

Ken

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Barry Broskowitz posted:

First, disconnect the speaker from the PS2 board. Then, briefly touch a 9 volt battery across the speaker terminals and see if you get a click. If you do, the speaker s OK and the PS2 board's audio amp is suspect.

maybe just use a single AAA battery for this test on these small speakers. Like Barry mentions "briefly"! You don't want to burn the voice coil. 

Barry Broskowitz posted:

First, disconnect the speaker from the PS2 board. Then, briefly touch a 9 volt battery across the speaker terminals and see if you get a click. If you do, the speaker s OK and the PS2 board's audio amp is suspect.

Why wouldn't you just test continuity of the voice coil with an ohm meter? If it's open, the speaker is fried. If it's a 4 ohm speaker, shouldn't it test close to 4ohms? Why send unregulated battery power across the voice coil?

George

Last edited by George S
George S posted:
Barry Broskowitz posted:

First, disconnect the speaker from the PS2 board. Then, briefly touch a 9 volt battery across the speaker terminals and see if you get a click. If you do, the speaker s OK and the PS2 board's audio amp is suspect.

Why wouldn't you just test continuity of the voice coil with an ohm meter? If it's open, the speaker is fried. If it's a 4 ohm speaker, shouldn't it test close to 4ohms? Why send unregulated battery power across the voice coil?

George

You can get a reading across a coil that is still intact. That does not mean it's OK. I've seen many blown speakers that the coil rubs and yet still tries to work.

Engineer-Joe posted:
George S posted:
Barry Broskowitz posted:

First, disconnect the speaker from the PS2 board. Then, briefly touch a 9 volt battery across the speaker terminals and see if you get a click. If you do, the speaker s OK and the PS2 board's audio amp is suspect.

Why wouldn't you just test continuity of the voice coil with an ohm meter? If it's open, the speaker is fried. If it's a 4 ohm speaker, shouldn't it test close to 4ohms? Why send unregulated battery power across the voice coil?

George

You can get a reading across a coil that is still intact. That does not mean it's OK. I've seen many blown speakers that the coil rubs and yet still tries to work.

Not true. I am not sure who told you that, but I did it just a couple of weeks ago when one of my speakers blew. Blown speaker showed open. New speaker read continuity. You may be right that it won't measure the full 4 ohms, but it will show continuity.

George

George S posted:
Engineer-Joe posted:
George S posted:
Barry Broskowitz posted:

First, disconnect the speaker from the PS2 board. Then, briefly touch a 9 volt battery across the speaker terminals and see if you get a click. If you do, the speaker s OK and the PS2 board's audio amp is suspect.

Why wouldn't you just test continuity of the voice coil with an ohm meter? If it's open, the speaker is fried. If it's a 4 ohm speaker, shouldn't it test close to 4ohms? Why send unregulated battery power across the voice coil?

George

You can get a reading across a coil that is still intact. That does not mean it's OK. I've seen many blown speakers that the coil rubs and yet still tries to work.

Not true. I am not sure who told you that, but I did it just a couple of weeks ago when one of my speakers blew. Blown speaker showed open. New speaker read continuity. You may be right that it won't measure the full 4 ohms, but it will show continuity.

George

no sense reasoning with you, you're right. It has to be then.

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