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How to fix the reverb on my crate head 120 watt

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PolyrhythmFX
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SOURCE: Crate 100 head. Reverb doesn't work.

Check the input RCA plug going into the reverb tank (silver box with two wires connected to it). Make sure the amp is off when you do this. Sounds like the output is working fine if hitting the amp does it.

Posted on Jun 19, 2009

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PolyrhythmFX
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SOURCE: crate gt 30 amp reverb wire loose. whrer does it

If its the input reverb tank wire or output reverb tank wire just reconnect it (if the amp has a reverb tank).

Posted on Jun 20, 2009

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1 Answer

Crate amp head loose spring


its the reverb tank spring, look where it is connected on the other side. this will give you an idea as to where it was connected. solder it back on.

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Crate flexwave 120 head effects malfunctioning


That is probably a momentary switch that is dirty and sticking. These onboard effects on guitar amps are usually nothing more than a computer sound card and I've found bad connections going to and from them as well. I do think that switch is dirty and sticking, though.

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Hi there,I have the same problem with my flexwave 120. I opened the amp to measure several capacitors on the small effect circuit board. If one of this capaciters have internal short circuit, wich will effect the others causing effects to fail. I removed them one by one to find possible short circuit. All capacitors were ok. I think the problem is in the processor wich is to diffucult to replace. I think it's easier to replace the effects circuit board. But where do we find this board??10_29_2011_6_25_35_am.jpg

Aug 07, 2011 | Crate Flexwave Fw120h 120 Watt Head Dsp...

1 Answer

My crate FW120HS has suddenly started giving me loads of reverb, and i have no idea why. Iv not changed any effects or my set up. Its just suddenly happened. Any Ideas?


This has a digital reverb unit. The settings are subject to get clobbered I suspect. I don't know if you are using foot switch for the reveb control... You may also have a cable that has come loose...

Here is a link to schematic for your unit:

http://elektrotanya.com/crate_flexwave_guitar_amp.pdf.pdf/download.html

Notice that the reverb is set by DC voltages from teh setting pots that go to the DSP chip. These setting pots receive voltage from a 16 volt ZENER regulated source. First thing is to CHECK that voltage. If the Zener has opened and you find much over that 16 volts, that is your cause of the problem.

The circuitry is on page 1 in the 3B to 3D lower left of the page.

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1 Answer

Sound is shorting out...its not the cable that I am using I have no trouble with it in any other amp. The overdrive channel does not work at all. And randomly all the effects will just decide they want to...


It sounds like the DSP processor is either about to go out, or is mostly there. Have a qualified amplifier technician take a look at the DSP. Also look up the cost of a new one.

Hope that helps!

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How to replace the light in the standby switch on a bugera 333 head ?


I don't believe the standby switch has a light, unlike the main power switch.

I can also understand why they don't include one due to electrical considerations. This switch switches hundreds of volts instead of the line power that the main power switch does.

I know the switches look similar, but these are available both as lighted and unlighted which the standby switch is the latter.

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1 Answer

I need schematics for this amp. know where I can get them?


Josh,

I also need schematics for this amp. How about whoever finds it first shares with the other?
Cool, Thanks,
bob at stumpweb.com

Jan 27, 2011 | Crate Flexwave Fw120h 120 Watt Head Dsp...

1 Answer

Crate 100 head. Reverb doesn't work.


Check the input RCA plug going into the reverb tank (silver box with two wires connected to it). Make sure the amp is off when you do this. Sounds like the output is working fine if hitting the amp does it.

Jun 19, 2009 | Crate Music

2 Answers

Crate flexwave 120 head sound cuts out


You have a broken solder joint. You'll have to disassemble the amp enough to get at the soldered side of the circuit board that the controls are mounted to and touch up any suspect solder joints. Just be sure to resolder only the joints that were originally soldered or need to be soldered. Hope this helps.

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1 Answer

Crate gt 30 amp reverb wire loose. whrer does it connect?


If its the input reverb tank wire or output reverb tank wire just reconnect it (if the amp has a reverb tank).

Feb 27, 2009 | Crate Music

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