sonolink
Well-known member
Hi,
A friend brought me a JHS Bonsai guitar pedal. The pedal works fine but the LED stopped working. It's a pedal emulating several versions of the Tubescreamer.
So I opened the pedal with the idea of replacing the LED. After desoldering it from the board I checked it and surprise! it works perfectly.
So I took a peak at the board and noticed that instead of the config:
9vdc -> current limiting resistor -> LED -> switch -> GND
There's a transistor. My guess is that the transistor is acting as a switch and for some reason is toasted, that's why the LED is not working. But I don't understand why there's a transistor there and if it has any function other than controllong the LED.
I've tried finding a schem, I emailed JHS technical support and even messaged Josh Scott (the CEO) through Facebook. I've had no answer whatsoever and couldn't find a schem.
Could someone help me out please? I've attached a pic of the part of the board where the LED circuit is.
Thanks in advance!!
A friend brought me a JHS Bonsai guitar pedal. The pedal works fine but the LED stopped working. It's a pedal emulating several versions of the Tubescreamer.
So I opened the pedal with the idea of replacing the LED. After desoldering it from the board I checked it and surprise! it works perfectly.
So I took a peak at the board and noticed that instead of the config:
9vdc -> current limiting resistor -> LED -> switch -> GND
There's a transistor. My guess is that the transistor is acting as a switch and for some reason is toasted, that's why the LED is not working. But I don't understand why there's a transistor there and if it has any function other than controllong the LED.
I've tried finding a schem, I emailed JHS technical support and even messaged Josh Scott (the CEO) through Facebook. I've had no answer whatsoever and couldn't find a schem.
Could someone help me out please? I've attached a pic of the part of the board where the LED circuit is.
Thanks in advance!!
