RM50 suddenly not working? Any help?

Discussion for both Egnater & Randall modular amps

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Mattfig
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Post by Mattfig » Sat Jan 27, 2018 6:11 pm

Reading the schematic there should be 4 fuses visible...

Do you see them?
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tnjazz
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Post by tnjazz » Sat Jan 27, 2018 6:15 pm

I see 5.

4 in a group near the power jack and one straight back from the common test point.

Kinda nervous about sticking my multimeter probes in there though. I don’t want to die inside a $300 amp...gotta be at least a Trainwreck or something.

warmachine67
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Post by warmachine67 » Sat Jan 27, 2018 6:22 pm

Don't do this if you are unsure or feel unsafe.

Leave the standby switch on and turn the amp off. This will drain the capacitors. Then just leave it unplugged for a few minutes and then you should b ok.

Then you can test your fuses.

Mattfig
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Post by Mattfig » Sat Jan 27, 2018 6:28 pm

warmachine67 wrote:Don't do this if you are unsure or feel unsafe.

Leave the standby switch on and turn the amp off. This will drain the capacitors. Then just leave it unplugged for a few minutes and then you should b ok.

Then you can test your fuses.
Screw this guy! Do it!

I'm joking of course....PLEASE don't dig around in there unless you feel secure in doing so....Draining the caps as mentioned above and checking the fuses is very easy and presents little danger unless you are very clumsy.... :)
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warmachine67
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Post by warmachine67 » Sat Jan 27, 2018 6:36 pm

Mattfig,

I'm curious, what exactly do those internal fuses do in broad terms?

I've always wondered. Are there 4 or 5?

Thanks !

tnjazz
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Post by tnjazz » Sat Jan 27, 2018 6:38 pm

I pulled all 5 and they all test OK.

Mattfig
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Post by Mattfig » Sat Jan 27, 2018 6:54 pm

In broad terms? I couldn't explain in better terms....Basically the protect different parts of the amp....Trasnformers....Power Supply....And preamp modules...

Is there a fuse you see near the modules???
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tnjazz
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Post by tnjazz » Sat Jan 27, 2018 7:03 pm

No other fuses I can see anywhere inside the chassis.

I even tested the two removable ones on the back panel and they are fine as well.

I'm stumped. But that is no surprise since beyond this I have no idea what I am looking at, ha!

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Post by tnjazz » Sat Jan 27, 2018 7:05 pm

Pretty sure this is a higher power's way of telling me "just stop goofing around and buy that Synergy SYN-2 already"

tnjazz
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Post by tnjazz » Sat Jan 27, 2018 7:07 pm

No issues whatsoever with this amp until I put in this Savation module and hooked it up to the Torpedo Live. I don't know how either one could cause this but it seems odd.

The LED on the Salvation module is out but it appeared to be working properly (and sounded great), as was the Two Notes.

tnjazz
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Post by tnjazz » Tue Jan 30, 2018 3:29 pm

Well the RM50 is headed off to my local tech tonight. I have a funny feeling that 10 minutes on the bench will fix whatever is going on with this thing.

In the meantime, the Synergy rig will be landing in my hot little hands tomorrow so I'm pretty excited about that!

warmachine67
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Post by warmachine67 » Tue Jan 30, 2018 3:34 pm

If you think about, let us know what it was.

I'm still curious. Congrats on the synergy btw.

tnjazz
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Post by tnjazz » Thu Feb 01, 2018 1:53 pm

warmachine67 wrote:If you think about, let us know what it was.

I'm still curious. Congrats on the synergy btw.

According to my amp guy, the issue was a bad voltage regulator in the switching circuit. It's apparently all well and good now.

tnjazz
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Post by tnjazz » Thu Feb 08, 2018 7:39 am

tnjazz wrote:
warmachine67 wrote:If you think about, let us know what it was.

I'm still curious. Congrats on the synergy btw.

According to my amp guy, the issue was a bad voltage regulator in the switching circuit. It's apparently all well and good now.
Further update on this: the channel switching relay turned out to have an intermittent fault which caused the issues with the voltage regulator. With a higher quality relay installed the amp is back to 100% again.

Huge props to Mattfig for providing me with the schematics to the amp! They were a tremendous help!

warmachine67
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Post by warmachine67 » Thu Feb 08, 2018 12:15 pm

Thanks for posting what happened.

Glad you got it worked out.

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