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PostPosted: Thu Nov 29, 2018 11:49 am 
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Joined: Sun Sep 14, 2008 1:37 pm
Posts: 22
Location: Nashville
Hey everyone. I'm stumped. If you guys can give me some specific points to test, either voltage or signal generator, I would greatly appreciate it.

Dry signal is perfect. When I turn the mix knob, there is no delay whatsoever. And modulation noise as well.

Thanks!
s


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PostPosted: Thu Nov 29, 2018 11:51 am 
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Joined: Mon Feb 04, 2013 8:28 pm
Posts: 1352
Location: Richland, WA.
First things first, let's see some pics. Here is a quick guide on starting a tech support thread:

viewtopic.php?f=20&t=20913

Edit: Nevermind, the image showed up now. Carry on.

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PostPosted: Thu Nov 29, 2018 12:03 pm 
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Joined: Tue Feb 09, 2010 4:45 pm
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Location: Rochester, NY
I haven't built the Echo Royal yet, but here are some things worth trying while you wait for people more familiar with it:

Dial in the trimpot if you haven't yet
Re-seat the ICs, just carefully remove and replace—or even just press down gently to make sure they're all the way into the sockets

It's always helpful to see the solder side of the board, too. I know it's a PITA to get it out of the enclosure to shoot it, but we'll need that photo to evaluate your soldering.

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PostPosted: Thu Nov 29, 2018 12:06 pm 
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Location: Richland, WA.
I second sjaustin about the trimpot, ICs and just generally making sure everything is secure, did you solder the middle PT2399's pin 15 for some reason? Also, seeing the bottom of the board might be helpful.

If you have a signal tester

You can use the Schematic to see where the signal for the delay path comes in, and see where it leaves each PT2399.

For example, pins 15 and 16 will be your input, and pin 14 will be your main output signal. If you're not getting signal at the input pins, take a closer look at the relevant components (C40, C42, C43, R48, R49, and R50). If you're getting an input signal, but no output signal, take a look at the PT2399 socket solder joints to make sure there are no shorts or anything.

Let us know what you find out.

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PostPosted: Mon Dec 03, 2018 7:22 pm 
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Joined: Sun Sep 14, 2008 1:37 pm
Posts: 22
Location: Nashville
Thanks for you help everyone. Turns out the 2 delay chips were bad. Swapped them out, and bang! Delay... delay... delay... delay...

Thanks again


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