Need help

[goofball_11]

Hi guys. First i want to say thanks for all the advice and inspiration youve given me and also to ask for help. Ive built a fuzz face according to GGG's layout and it worked, but now it doesnt. I dont know why, when the effect is bypassed it works but it doesnt when it is engaged. There are no loose wires or anything and everything looks the exact same. PS. PNP positive ground

[db]

Have you got a DMM/volt meter?

If so, take some measurements and report back....

[jonathan perez]

check battery

[petemoore]

  Kool when it works, needs debugged when it doesn't.
  The debugging thread has info.

[goofball_11]

Im glad people are responding, i really appreciate it. anyways im really new at this and im not really sure how to actually measure with a volt meter ill brb after i read the faq

[goofball_11]

Sorry, im not getting anything, i dont know whether thats cuz dont know what im doin or whether theres just no current. Can somebody explain better than in the faq how to do it.

[GibsonGM]

Set your meter for "DC VOLTS"....if you can't do that, check the manual 

Put the black probe on the battery "-" terminal, and touch the red probe to the battery "+" terminal.  Write down the battery voltage.

Now (and don't get confused here), clip or otherwise secure the red probe to the "+" terminal.  This is ground, your reference point to measure from.

Touch the black meter lead to the 3 pins of the transistors in turn.  Write down the voltage readings you get.  Be sure to get the pins correct when you're doing this.  Don't worry if the numbers are like "-2.5v", that's ok.   The first transistor after the input cap is called "Q1", and the next one is "Q2".   So, using your schematic, make a chart and provide the voltages at Q1 and Q2, like this:

Battery= some #
  Q1           Q2
B some#  Some #
E
C

B, E, C being Base, Emitter and Collector of the transistors, of course.  That way we can tell if they're operating the right way.  I'm assuming you can figure this out if you built it!   

Once you provide those voltages, someone will be able to suggest where to go next and the possible cause of why it's not working.
Good luck   

[goofball_11]

Q1
B=1v
E=6v
C=3v
Q2
B=3.2v
E=6.1v
C=6.1v

[petemoore]

Q1
B=1v
E=6v
*C=3v
Q2
*B=3.2v
E=6.1v
C=6.1v
  The connection between Q1C and Q2B should be a wire, and the voltage should be the same on these pins, check that connection.
  Also, but just 'suspicious' is the likeness of the Q2 b and e pins, being the same voltage makes me suspect...are they connected?
  I don't see the battery voltage, the reference of all the other voltages, but also Q1E should have connection to ground reference.
  ...and usually the pins are listed in this order:
E
B
C
or
C
B
E
  Not that it matters as long as the pin assignments are correct, most FF type transistors put the base between the C and E.

[goofball_11]

Q2b and e are not connected. The battery voltage is 8.8V and Q1E has the the same voltage as the ground.

[goofball_11]

o and i dont know if this matters but it was workin great for a couple days and i went to use it today and nothin. ps i checked the battery

[goofball_11]

it seems as though C1=0v should i just replace the cap or is it supposed to be that

[petemoore]

  Could be other,
  but I think maybe the transistor orientation should be re-observed.
  Get the data sheet if you can for the transistor, not the direction of the B/E diode in the daigram, make that match the schematic diagram of the transistor...ie pnp transistor in a positive ground circuit, C/B/E matches from data sheet, [or DMM pinout verification...or..
  Then there's the matter of Q1C / Q2B..either the voltages are a misread, something else changed to cause a misread, or Q1C/Q2B aren't connected as shown on schematic.

[goofball_11]

sorry i threw out the data sheet when it fired up. also Q1C/Q2B are connected and have the same voltage? Also the wire that is right of the ground going to the switch is getting no voltage. Same goes from the wire to the 3 lug on the 500k pot

[goofball_11]

alright i really need help. im gettin sooo frustrated with this, should i just rewire it or somethin? Or is there anything else i can do first. The board seems to be soldered perfect so its not that.  i dunno