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Crate GX 40- C schematic

This amp has a 60 cycle hum and lost some of its low end frequency

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  • 28 Answers

Power supply capacitors failed. This is a common problem with 1990's crates, also the power on "POP".

Posted on May 02, 2019

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5 Related Answers

Anonymous

  • 192 Answers

SOURCE: amps broken need to fix it

Their may be a schematic on the inside of the amp.I don't remember if Crate puts one or not. And I have had several Crate amps. never needed repair except for tube replacement. If there is not one in side , go here and find what you need . http://www.crateamps.com/support/warranty/ Good luck DFD please rate me TK U

Posted on Apr 19, 2009

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Anonymous

  • 73 Answers

SOURCE: Distortion stoped working on my amp

Hi there. Sounds like the distortion foot switch is stuck. Try a shot of WD-40 where the button goes into the switch and then click it on and off a bunch of times.
Thanks
Paul

Posted on Jul 11, 2009

Anonymous

  • 157 Answers

SOURCE: Crate GX-20M burned resistor + popped cap values?

go to
http://www.crateamps.com/support/index.php
you may find what you are looking for there.

Posted on Aug 20, 2009

Anonymous

  • 1469 Answers

SOURCE: Crate GTX-30 Guitar Amp Schematic... The thing

Hi. use this link to check for the schematics.


crateamps.com/support/discontinued.php

or

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

take care.

Posted on May 31, 2010

Fred Yearian

  • 5603 Answers

SOURCE: CRATE GX- 212 HUMS WHEN TURNED ON AND CHIRPS WHEN

Witth an oscilloscope analyze the ripple voltage across C67, C70, C14, and C12. Pay close attention to the last two of these which are on +/- 15 volt lines.

The "chirp" when shutting down is LIKELY normal and would probably be from teh DSP effects unit as it goes down. The voltages go out of the operating range and the device essentially goes nuts for a second or so.

Posted on Sep 16, 2010

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1 Answer

Need amp schematic for a Crate model vc6112


Web page with schematics and requests:

http://music-electronics-forum.com/t26486/

http://music-electronics-forum.com/attachments/15279d1315547654-crate-vc6112.pdf

http://music-electronics-forum.com/t16609/

http://music-electronics-forum.com/attachments/7268d1260872380-crate_vc6112_271pwa_5.pdf

http://music-electronics-forum.com/attachments/7269d1260872394-crate_vc6112_271sch_5.pdf




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




User guide at link below from 1998 has mailing address in St. Louis.


https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0ahUKEwit2JO06LbZAhVG2GMKHflPAxEQFgg4MAI&url=http%3A%2F%2Fpdfstream.manualsonline.com%2F6%2F6d0e7f56-c06e-40bc-9925-bb1c66338de7.pdf&usg=AOvVaw1Qy5Pze8vKekErxgjmMg0U




Crate VC 6112 Owner Manual

Feb 21, 2018 | Crate Music

2 Answers

How to fix the input plug on a Crate GX-15 guitar amp.


If u can bend the 2 prongs back towards plug end it. Will work on prong rides on tip of it the second rides in between the to nylon rings on it if that doesn't work any radio shack carry it for about 1-2 dollars

Jan 02, 2015 | Crate Music

1 Answer

My Marshall Haze 40 Amp started making a very loud humming noise after a couple hours of playing.I let it cool down,and turned it back on and the noise came back after a few minutes


may be one of the electrolytic capacitors in the power supply has become leaky...this is a common problem among amplifiers...so you let it cool down..then after a period of time the capacitor heats up and then causes the hum...the power supply caps filter out the 60 hertz ac line noise...which is probably the frequency of the sound it is making...this is a good indication of these caps going bad....another thing you can check is to see if the amp is properly grounded(eg: the ground pin on the plug is present) and that you dont have an open cord or input

Jul 10, 2011 | Marshall Amplification Marshall Haze 40...

1 Answer

CRATE GX- 212 HUMS WHEN TURNED ON AND CHIRPS WHEN SHUT OFF. NEED SCHEMATIC AND ADVICE TO ISOLATE THE BAD CAP IN WHICH CIRCUIT THAT IT IS OSCILLATING.


Witth an oscilloscope analyze the ripple voltage across C67, C70, C14, and C12. Pay close attention to the last two of these which are on +/- 15 volt lines.

The "chirp" when shutting down is LIKELY normal and would probably be from teh DSP effects unit as it goes down. The voltages go out of the operating range and the device essentially goes nuts for a second or so.

Sep 16, 2010 | Crate FlexWave FW15 Guitar Amp Combo, 15...

1 Answer

Crate GTX-30 Guitar Amp Schematic... The thing blew, and I need to replace two components...


Hi. use this link to check for the schematics.


crateamps.com/support/discontinued.php

or

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

take care.

May 31, 2010 | Crate FlexWave FW15 Guitar Amp Combo, 15...

1 Answer

Distortion stoped working on my amp


Hi there. Sounds like the distortion foot switch is stuck. Try a shot of WD-40 where the button goes into the switch and then click it on and off a bunch of times.
Thanks
Paul

May 28, 2009 | Music

1 Answer

Amps broken need to fix it


Their may be a schematic on the inside of the amp.I don't remember if Crate puts one or not. And I have had several Crate amps. never needed repair except for tube replacement. If there is not one in side , go here and find what you need . http://www.crateamps.com/support/warranty/ Good luck DFD please rate me TK U

Apr 18, 2009 | Crate Music

2 Answers

Looking for a circuit board manual or diagram for a crate mx120r guitar amp


You can try Loud Technologies @ 866-858-5832, [email protected]

They hooked me up with parts and schematic for my Crate G212XL.

Apr 18, 2009 | Crate FlexWave FW15 Guitar Amp Combo, 15...

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