Question about Crate FlexWave FW15 Guitar Amp Combo, 15 Watt Single 8 Speaker

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Crate PA6FX Popping noises coming through speakers. Found darkened area on board right above speaker inputs. Would like to have schematic or part description of the resistors that look charred.I tested both of them found high resistance on one no resistance on the other.

Posted by robb91705 on

  • PolyrhythmFX
    PolyrhythmFX May 11, 2010

    Definitely need pics. I couldn't find a schematic but pictures would be necessary. One thing you could do if you can't get pics is tell us the band colors of the burned resistors...if they are thru-hole and not surface mount. Then check the resistance of each resistor and post that info as well.

  • Mike Rogers May 11, 2010

    Can you take a digital picutre of this? Sounds like the output jack shorted and drew lots of current (causing burned board). Take a pic and send it to me and I'll see what I can do.

    THanks,

    -mike

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If they are square cement power resistors they are probably 3-5 watt 300-500 ohm .... are there colored stripes on the resistors? those are probably grounding resistors, they usually are installed too close to the board, get real hot a bunch of times and then crack the solder welds. when you replace them bring up the height and make space under the resistor to keep it off of the board and put a little drop of silcone underneath to hold them in place.

Posted on May 08, 2010

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Hi - when I power on teh board the speakers start clicking - at first it was a very loud popping sound but now it is just a semi loud clicking but it is constant


Make sure you use BALANCED interconnection cables and the board is powered from the SAME receptacle or source as the speaker/amp.

This board is very simple and if the source of the noise is in the unit, I would look to a problem involving the Phantom power supply. The Phantom connects to the mic inputs and if it gets noisy it will often couple into the inputs.

Unplug ALL inputs to verify it is not coming in via the mics. Does the main fader control the loudness?

Here might be your schematic:

http://elektrotanya.com/soundcraft_e8_mixer_sch.pdf/download.html

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Other possible problems may be a bad solder joint or cracked circuit board.

Candle the board with a bright light to look for cracks.

Bad solder joints take experience to spot, but pay particular attention where panel mounted volume controls solder to the circuit board. Looking for the little ring around the solder menicus takes a sharp eye and good lighting. Resolder any suspected bad joints.

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Hi. use this link to check for the schematics.


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music-electronics-forum.com/sitemap/f-60.html.

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1 Answer

I bought a Crate CR212 new in 84 It came with celestians they are


I can't be sure for the result at your area, but I have to tell you that whenever I rebuild speakers at technicians in Greece (that's my country), the results were not very good. They always worked but after some working period started to make strange noices. Especially if you are a mucisian and the amplifier is yourself, replace them.

In case of a problem or clarification, don't hesitate to post me a reply.
If you are satisfied, rate my solution with the "thumbs".

Thanks and regards
Please kindly rate this solution
Stelios
direct FixYa link: http://www.fixya.com/users/technical114

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1 Answer

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I can understand your confusion... and a lot depends how you are going to use this. There are some caveats regarding the connections,
If you use the 1/4 outputs on the GSP, there is a speaker modeling like function that is NOT available, that IS available IF you use the XLR outputs.
The STP is an "Insert Snake" which is not really what you want as it is intended to send and receive (audio going both directions in the cable.
If you want that speaker function, then you should get two XLR to 1/4 TRS cables and go from the XLR's on the GSP to the Left and Right inputs on the back of the Crate. Your audio or guitar then is connected to the GSP guitar input.
If you connect the guitar to the crate and then use the STP, Plug the TRS single connector into the Left/Mono/send/rtn on the Crate. The Send cable of the Y should go to the Send jack on the back of the GSP and the return should go to the left return jack of the GSP. This connection I would NOT recommend as it will be noisier and you will lose the stereo effect capabiltiy since the effect is inserted as a mono.

I believe you would be happier with using the XLR's to carry left and right to the Crate and run your inout to the GSP. In short, you have the wrong cable to do the best job.

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1 Answer

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1 Answer

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