[SOLVED] Flashing LED to solid?

Thread Starter

Jukebox Swirls

Joined Apr 27, 2024
2
This is a microphone board from an audio mixer. When switched on, the LED flashes to alert that it’s on. How can I instead make the LED solid when on? Thank you

IMG_2859.jpeg
 

MrChips

Joined Oct 2, 2009
31,076
Find out what power is available on the board. It looks like +18V on pin-4 and -18V on pin-11 of Z15, uPC4741C.

You can try disconnecting the LED D23 at resistor R84. Connect a 10kΩ resistor from positive power (+18v) to the LED.
Another possibility is to just short across C26 with a 10kΩ resistor. Any resistor will do, even a wire jumper.
 
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