another possible option is that there is short to 5v
somewhere on the trace to the micro
to test for this
measure the voltage at the r146 and r144 juncture
if it is less than a volt then there is problem
between r146 and the micro
if it is more than a volt then there is problem with q37
Well unless the transistor was made wrong or the drawing on the board is wrong, I have the transistor in correctly, the voltage at the junction of r146 and r144 was 4.27 volts...so I guess it means that q37 is bad. How can I test if the pin is fried on the micro? Where can I order a new 2SC536F?
well I obviously really BANNED up...I just checked the voltage I was sending from R3 to r146 and I had my aligator clip on the wrong side of the r3 and was sending it 23 volts instead of 5 volts. SO in addition to q37 what else could I have BANNED up sending in 23 volts?
Well now that I fixed where I was attaching the clip to r3 I can't trigger the gate anymore with R3->r146...however I can trigger the gate by bridging the the right and center pins on q37.
q37 doesnt need to be a 536f as it isnt involved
in any of the audio
so any npn will do
although verify the pinout before you put it in
as different transistors have their pins in different places
you probably didnt hurt anything else
you definitely fried your microcontroller though
anybody know the average beta of the 536f transistors? i believe i also have a bad q37 and its beta reads 75, is that to low? i've tested other 536f transistors on the board and get a large range of values.
