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temperature problem of regulator in x3 live


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Hi, i'm using x3 live.
I replaced u17, u18, u19, u20 to oap2134ua and opa4134u.
After replacement, i touched u18, the opa4134ua was very hot and i could only hear noise from the headphone jack.
U30(5va regulator) also was hot.
Chip temperature was about 65°C.

I think u18and u20 shorted, so i removed u18, u20 and i could heard guitar sound.

And, +15V and -15V rail also shorted each other. 

But, u30(5va regulator) was still hot(65°C).
is the regulator temperature normal?

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