Genz Benz Streamliner no sound

[steviedee]

I started rehearsing tonight and my Streamliner just faded out and now has no volume. The lights go on, looks fine but no sound. I'm a bit flummoxed, could it be valves or fuses? Any ideas much appreciated. Additionally, I've gone and sold me back up amp!

[MoonBassAlpha]

I'd swap out the valves one at a time until you find the culprit. If that doesn't diagnose it, then it probably needs a stern looking at!
Actually, you could also try plugging into the effects return and see if you get any sound out. If you do, it's most likely something in the preamp, where all the valves live. In fact do this first. Will save you opening it up - if the power stage isn't working, it's off to amp hospital with it

Edited February 8, 2017 by MoonBassAlpha

[steviedee]

[quote name='MoonBassAlpha' timestamp='1486544292' post='3232559']
I'd swap out the valves one at a time until you find the culprit. If that doesn't diagnose it, then it probably needs a stern looking at!
[/quote]

Lol will do cheers!

[whizzzy]

Before you launch into swapping valves it would be wise to power the amp up with speaker connected and with your ear close to the speaker can you hear any gentle hiss noise? This will at least determine if the audio power stage of the amp plus everything downstream of that is working. If you can't hear any hiss noise then check the speaker and associated wiring first.

[steviedee]

[quote name='whizzzy' timestamp='1486552212' post='3232645']
If you can't hear any hiss noise then check the speaker and associated wiring first.
[/quote]

Hi Whizzzy thanks for that, i didn't hear any audible hiss but I'm pretty deaf! I did put a set of cans into the headphone out and nothing, I dunno if that helps with the diagnosis.

[bertbass]

Mine did that and it was the end, that's how I ended up with my Rumble 500 which I have to say I'm very happy with.

[steviedee]

[quote name='bertbass' timestamp='1486554770' post='3232670']
Mine did that and it was the end, that's how I ended up with my Rumble 500 which I have to say I'm very happy with.
[/quote]

Was it knackered?

[markstuk]

You might want to put a cable into the effects send/return... Some chat on basstalk about this..

as recommended already above :-)

Edited February 8, 2017 by markstuk

[whizzzy]

Well if you can't hear anything, even through headphones then it sounds like a problem in the power output stage or power supply section and will warrant a more thorough diagnosis.

Have you checked all of the fuses?

[steviedee]

[quote name='whizzzy' timestamp='1486555856' post='3232693']
Have you checked all of the fuses?
[/quote]

Fuses or valves were what I was hoping, I've not opened it up yet.

[MoonBassAlpha]

[quote name='whizzzy' timestamp='1486555856' post='3232693']
Well if you can't hear anything, even through headphones then it sounds like a problem in the power output stage or power supply section and will warrant a more thorough diagnosis.

Have you checked all of the fuses?
[/quote]
Wouldn't the headphone feed be tapped off before the power stage though?

[whizzzy]

[quote name='MoonBassAlpha' timestamp='1486560542' post='3232762']
Wouldn't the headphone feed be tapped off before the power stage though?
[/quote]
Hard to say without having access the the schematic diagram of the amp. The conventional approach for headphone internal connection though is across the speaker output but with a resistance in series to attenuate the signal level going out to the headphones.

[bertbass]

[quote name='steviedee' timestamp='1486555289' post='3232679']
Was it knackered?
[/quote]

Yes, totally. It was when Fender bought Genz Benz and before they sold it again. They gave me the Rumble as a replacement.