Hi all, first post.
I've been working on this 41hz amp10-basic, my first amp, on and off for two years now (can be hard to find time), and today I just assembled it enough for a basic test of the indicator leds, which I did, but while I was checking for 5v with a multimeter (because I just modified the 5v circuit according to the suggestion in this thread) my hand twitched (been kicking myself), shorting something. There was a small brief fire by the TA chip, and a few of its pins burned out of the casing, but the fuse blew and there appears to be no major damage on the main board. However, whenever I reconnect the power the (new) fuse blows immediately, I don't know why. Does anyone familiar with this kit have ideas on why it's shorting or how I might fix it and the chip? I have a spare TA chip, but it would seem to me very difficult to desolder the burnt one and replace. I would really like to get this to work, and appreciate any replies.
Picture of fire area, by the two horizontal resistors:
I've been working on this 41hz amp10-basic, my first amp, on and off for two years now (can be hard to find time), and today I just assembled it enough for a basic test of the indicator leds, which I did, but while I was checking for 5v with a multimeter (because I just modified the 5v circuit according to the suggestion in this thread) my hand twitched (been kicking myself), shorting something. There was a small brief fire by the TA chip, and a few of its pins burned out of the casing, but the fuse blew and there appears to be no major damage on the main board. However, whenever I reconnect the power the (new) fuse blows immediately, I don't know why. Does anyone familiar with this kit have ideas on why it's shorting or how I might fix it and the chip? I have a spare TA chip, but it would seem to me very difficult to desolder the burnt one and replace. I would really like to get this to work, and appreciate any replies.
Picture of fire area, by the two horizontal resistors:
Thanks,
eCioffi
eCioffi
I would guess that the chip is dead and hopefully everything else still works. Cut all the pins of the chip to remove it, then remove the remaining wires one by one. Clean the board and check for damaged traces etc. Good Luck!
I would also cold check the surrounding components when the chip is out of circuit and check for damaged tracks.
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