Messages

Sorry flanagan, europe here. And thanks for all the help Scruffie, it was very valuable.

Yes I am, and i guess you are right, I just used my audio probe on the 3007 and the output sounds exactly the same as the input. That means it's a fake right? Btw, do you know if it can be replaced by a nte1641?

well i now get the right voltages but still no noticeable modulated sound.

well I'm getting kind of annoyed here. The voltages on those pins, if i move the board a little or if some minutes pass, they have the right values, but then, hey return to the wrong values

sorry, 8.68  for P2 of the 3007

I know get on the 4046:
P2 - 8.69 V
P3 - 0 V
P4 - 4.36 V

And on the 3007
P2 - 0 V
P6 - 0 V

Is that correct?

U1(TL072CP):
P1 - 7.46(And then decreases constantly until 0, than starts again) V
P2 - 7.42(same as above) V
P3 - 0.98 V
P4 - 7.8 (Sometimes changes) V
P5 -  1.06 V
P6 - 5.22 V
P7 - 5.22 V
P8 - 8.71 V

U2(MN3007)
P1 - 8.71 V
P2 - 8.71 V
P3 - 5.22 V
P4 - 0 V
P5 - 0 V
P6 - 0 V
P7 - 6.72 V
P8 - 6.72 V

U3(TL072CP)
P1 - 4.9-5.70 V
P2 - 5.18 V
P3 - 5.1-5.34 V
P4 - 0 V
P5 - 5.18 V
P6 - 1.51 V
P7 - 5.39 - 5.42 V
P8 - 8.70 V

U4(CD4046BE)
P1 - 0 V
P2 - 4.29 V
P3 - 4.36 V
P4 - 4.36 V
P5 - 0 V
P6 - 0.93 V
P7 - 0.93 V
P8 - 0 V
P9 - 5.14 - 5.17 V
P10 - 4.27-4.30 V
P11 - 4.45 - 4.49 V
P12 - 6.79 V
P13 - 0 V
P14 - 8.69 V
P15 - 0 V
P16 - 8.69 V

I'm sorry but it belonged to a friend of mine's dad. And i don't really have a way to contact him now but on the side, it says BICC vero no. 03-27557B

Thanks scruffie, the voltage on pin 14 is now the same as in pin 16 (bad contact) but I still don't have the modulated signal, only the clean signal.

Yes, R12 is in the right holes

U3(TL072CP)
P1 - 1.4-8.0 V
P2 - 5.26-5.42 V
P3 - 4.0-6.87 V
P4 - 0 V
P5 - 5.27-5.42 V
P6 - 1.45 V
P7 - 4.4 - 6.8 V
P8 - 8.77 V

U4(CD4046BE)
P1 - 8.76 V
P2 - 0 V
P3 - 0 V
P4 - 4.42 V
P5 - 0 V
P6 - 1.03 V
P7 - 1.03 V
P8 - 0 V
P9 - 5.22 - 5.80 V
P10 - 4.24-4.71 V
P11 - 4.14 - 4.72 V
P12 - 6.85-6.88 V
P13 - 8.76 V
P14 - 2.92 V
P15 - 0 V
P16 - 8.76 V

Voltages:
U1(TL072CP):
P1 - 7.42 V
P2 - 7.42 V
P3 - 7.32 V
P4 - 7.85 V
P5 - 7.33 V
P6 - 7.31 V
P7 - 7.33 V
P8 - 8.79 V

U2(MN3007)
P1 - 8.78 V
P2 - 8.78 V
P3 - 7.32 V
P4 - 0 V
P5 - 0 V
P6 - 0 V
P7 - 6.89 V
P8 - 6.90 V
U3 AND U4 coming up in a sec

Pics:

Thanks for replying so quickly! I did have in account the trace cut under R4 and I checked the polarity's on the caps and on the diode. As far as the schematic goes, I'm sorry but I can't find one that uses the same components as the ones in this layout but I will have pics and the ic's voltages up in 5 min, along with the names of each IC. The values of each cap and resistor are described under the layout. The only replacement is the diode. I'm using a 1N4003 as a replacement for the 1N4001.

Hello everybody, new here at the forum. I'm having trouble with a pedal I just built. Here are the schematics: http://www.sabrotone.com/?attachment_id=3129. I can get the "dry" (Clean) signal throw but not the altered one. I did some audio probing and I discovered that th eproblem is on C1. The thing is, when I attach the battery to the circuit, the signal can't get through C1. However, when deattach the battery, the signal gets through C1 and into the input of U1. Could anybody please help me out and tell me what could cause this?
Many thanks.