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JR Receiver Test

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Racer 1966

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Is there any way to check a receiver?
I bought a T-Maxx basket case (because I like to fix things) and it came with JR xr2i radio. The radio appears to be working, shows voltage and can access and adjust all menus, but there is no response from the servos. I know the servos work, I took the radio and receiver from my nitro sport and put them on the maxx. Just wondering if there are any tests to check before replacing it. Can bad crystals cause the problem? Any way to check them? It is a JR receiver and is Am 75mhz.

Thanks
 
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