Headtrip fv1 voltage

[chris weaver]

Headtrip fv1 pin 10 voltage is .30, should be 1,16? Any ideas?

[chris weaver]

So after some research, perhaps the crystal isn't oscillating?

[somnif]

Gonna need some more details. Are the voltages elsewhere in the circuit looking okay? Can you provide a picture or two of the board? The crystal being weird wouldn't mess with voltages on pin 1, so something else is probably going on.

In the mean time, check the values of R5, R6 and R11, C5 and C6.

[chris weaver]

Voltages are good, I'll try to get pics of the board, it's pin 10 not 1

[somnif]

Voltages are good, I'll try to get pics of the board, it's pin 10 not 1

I really need to stop trying to function before having coffee.....

In that case, what does the voltage look like on C9? Are you getting signal out of the pedal at all?

If your multimeter has a frequency counter it should be easy to see if your crystal was damaged at all, but beyond that the only ways I know to test crystal integrity wouldn't work "in situ".

[chris weaver]

C9 is 1.31, no sound out at all, powers up, led works, no bypass or effect signal. Audio probe gives me signal up to jacks idk

[chris weaver]

ok, board pics! All other voltages are correct, knobs & switches set as per build document. Pin 10 is consistant at .30 instead of 1.16, continuity tests ok.

[chongmagic]

Are you sure that pin 10 is making a good connection? Hard to tell from the pic but it seems to have lots of flux around it. I would recommend socketing your ICs if you can going forward, it keeps the chip from frying and makes troubleshooting much easier.

[chris weaver]

i get continuity, yes I put a ton of flux on there to make sure it was making good contact, I'm going to clean it and use a little solder paste & hot air just to be sure. how would you socket an smd?

[somnif]

i get continuity, yes I put a ton of flux on there to make sure it was making good contact, I'm going to clean it and use a little solder paste & hot air just to be sure. how would you socket an smd?

Can't really socket SMDs (well, you can, but the sockets are ridiculously expensive and bulky), but the other chips could be.