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Old 21st October 2007, 02:26 AM   #1
diyAudio Member
Join Date: Oct 2007
Default PA6FX Mixer Power smoke

Does anyone have a schematic for a Crate PA6FX PA? I've replaced a transistor and a couple of bad diodes, but it still pulls to much input current in the power section.

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Old 2nd November 2007, 04:02 AM   #2
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Default Schematic PA6FX

Are you still looking for a schematic? I have been a service center for approx. 6 years and I have had several dealings with the PA6Fx's, all 3 versions. I have a schematic on CD that I can FAX you a hard copy. The power amps were all the same, it's the input boards that are different. 2-band EQ per input, 3- band EQ per input, seperate 1/4" and XLR plugs or combo input plug.
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Old 2nd November 2007, 01:09 PM   #3
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Default Schematic

Yes, I am looking for the schematic. I just found out my daughter blew a PAFX4 mixer also in much the same manner as the PAFX6.
She's been banned from the music business for a couple of weeks. I don't have Fax availability until Monday. I'd be happy to pay for a copy of the CD and shipping.
Thanks for the response.
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Old 3rd November 2007, 07:48 AM   #4
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I'll have my son help me copy the CD with Crate schematics and then I'll find out where to send it to. Cost will be minimal. I've had good service from the Crate mixer/amps and I'm just trying to help.
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Old 17th December 2007, 11:52 PM   #5
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Join Date: Oct 2007
Default Problem found

After replacing the power transistors and their drivers, it quit blowing fuses, but, I still had a really bad muffled distortion problem. It ended up being IC2 in the PA6FX schematic which looks like a transistor but it is termed a heat sensor for the circuit which is located amongst the power transistors on the board. I thought it would be the last thing I thought would cause a problem like that.

Thanks for the Schematics.
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Old 18th December 2007, 07:37 PM   #6
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I'm Glad you found the problem. Hopefully you can get the PA4 going also.
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Old 20th May 2008, 08:10 PM   #7
MoBruce is offline MoBruce  United States
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Join Date: May 2008
Default Need schematic also

Hi Could you send me a copy of the PA-6 schematic also.
I am having a loud rumble coming out of it.
Doesn't change no matter what mixer/volume settings are.
I'm suspecting a bad final stage but would be easier with the prints.
Email is Mobruce777@yahoo(Dot)com

Thanks in advance
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Old 9th June 2008, 02:26 AM   #8
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Default PA6FX No Monitor out

Hello I have a pa6fx that works fine but has no output to the Monitor. I wsas hoping to get a schematic to find values tyo begin the search. Anybody ever encountered this problem?
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Old 8th December 2008, 11:06 PM   #9
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Default heat sensor pa6fx

im havin the same issue with the muffed distortion sound and i was wondering how you fixed your heat sensor... and if you replaced it, how much do they cost
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Old 4th January 2009, 02:13 AM   #10
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Join Date: Jan 2009
Default PA^FX Mixer Power Smoke

Hello All.

I also have a PA-6 6 channel head that is distorting a ton. It does not blow fuses, but does not work that way it should.

Could I ask for a Schematic from anyone who might have one?

Maybe over time I can also provide schematics for folks. I have a lot of Fender Tube ones that someone might need.

Please advise.

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