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Marshall AS50R acoustic amplifier, the reverb has stopped working on both channels.

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: Marshall AS50R produces a loud hum with an

Sounds like a power supply filter cap has gone bad.

The hum you're hearing could be the 60 Hz AC, especially if it is a low frequency.

If that IS what it is, the Zoom G2 was just a coincidence.

Posted on Aug 22, 2009

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  • 506 Answers

SOURCE: Reverb problem

I highly doubt the reverb pan is dead, there are TL072 opamps on the input and output of the Reverb pan. Check those out. You can get the schematic from fenders website here. U6A and U6B are what you are looking for.

http://www.fender.com/support/amp_schematics/pdfs/Roc_Pro_1000_Schematic_B12.pdf

Posted on Dec 28, 2009

  • 88 Answers

SOURCE: my marshall mg100hdfx digital fx rack wont work

sounds like the effects module has stopped working . you could try re-working the joints around the i.cs on that board if you have a rework station. i have only managed to repair one baord this way suggest replacement is the best course of action. uk cost of panel approx £50.00 + fitting

Posted on Feb 04, 2010

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  • 5603 Answers

SOURCE: my marshall classic reverb 30 makes sound some

The volume control knob PROBABLY is broken, dirty or has bad soldering to the circuitry.

Use some CRC226 in the control if dirty. While you have the unit apart, check the soldering and for any circuit board cracks.

Posted on Feb 21, 2010

  • 417 Answers

SOURCE: shure sm58 mic stopped working ...

Check the wire connections where the xlr cable connects.

Posted on Apr 15, 2010

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Marshall AS50R produces a loud hum with an intermittant loud click, even when nothing is connected. This happened after use with zoom g2


Sounds like a power supply filter cap has gone bad.

The hum you're hearing could be the 60 Hz AC, especially if it is a low frequency.

If that IS what it is, the Zoom G2 was just a coincidence.

Aug 07, 2009 | Audio Players & Recorders

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