Question about Crate SPA1600 Power Amplifier - SPA Series Car Audio Amplifier

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Intermittent shorts in a Crate Limo TX50DE Guitar

Intermittent shorts in a 7 year old Crate Limo TX50DE Guitar amplifier. 
Symptoms: Both the Voice Channel and the guitar channel pop, rattle and cut-out for no apparent reason.  Also the guitar channel only works on the ''clean'' setting.  The distortion side of the amp is non-functional completely.
Finally, the ''effects'' seem to switch around on their own.  I set it at a light reverb, and pretty soon it's got ''chorus'' or something else instead.
I've already spotted some poorly soldered pot connections, but I suspect more issues.
I'm looking for a schematic.  I have an engineer friend with an affinity for electronics (and specifically guitar amps) who has offered to debug it for me-provided I can locate a diagram).

Thanks.

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  • ampman72 Apr 27, 2009

    Need schematic for crate limo TX50DE. Getting 5 volts DC on speaker outputs.

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Turn that ****** on and get a can of freeze spray. coming and going type issues is usually related to a failing electrolytic capacitor. there may also be a bad mosfet, rectifier, diode, etc. i would be suspect to caps. schematics probably only available thru crate and you have to pay a couple bucks, but trust me its worth the couple bucks spent and having it on its way than wasting hours online not getting anywhere. by the way i checked my sources and came up with nada.
yostamplifier.com

Posted on Jan 21, 2010

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