3pdt prob

[clamup1]

hey this is the first 2pdt ive put in. i put it into a DOD OD 250 clone. following this

http://www.diystompboxes.com/smfforum/index.php?topic=970.0 (jacks and led+resistor)

im getting the distortion but the volume pot dosnt work and the led wont light up. ive messed with this thing for 4 hours.

[blooze_man]

Can you post a decent gutshot?

[petemoore]

  Might as well run the preliminary debugs:
  Check for non-shorting conditions of battery clip first, under all conditions [including plugging in, and unplugging all or that matters].
  While the black lead is connected to a ground [most of the above and much can be tested from the ground reference], check that the batteryclip - [small side] actually makes it to the ring, then the sleeve only when the plug is inserted.
  Preferring to test and tweek the circuit board aside, debugs are generally easier without the 'extras'...especially switches that can defeat function, these deserve their own debuggings too.
  Anyway, know that "when input the circuit outputs" makes it more like an adjustable wire than a series of hidden pitfalls.
  So plug goes in and ring/sleeve of Stereo jack become common ground through the Mono-phono and power is supplied [series tests for this].
  Then the isolated plug tip [from ground, anything else] carries the circuit in, through the switch [you may need to hit/change switch modes once] ?[test from cables other tip to circuit board input, for continuity], then use a DC blocking capacitor [once past the circuits DC blocking/input capacitor]...the audio probe will take you inside, just hook it to an amp [ground, and hot, like guitar, but use a DC blocking capacitor, nonpolarized, large-er-ish].
  Now you have the audio probe [cutting the cable or otherwise using shielded wire, a phono plug, and a capacitor [shielding is taped back by where capacitor is soldered to the center/hot wire...some use heatshrink option]...now you can see how far [through the signal path of the circuit +/-'s and outputs on opamps, wherever the path is and the power supply isn't on transistors circuits [mostly].
  Otherwise see what the voltages do, read the debugging page and that's the super sticky thread known for developing debugging 'chops'. 

[clamup1]

sorry got tired of messing with this thing

[clamup1]

hey. the volume pot worked before i put the swich and the led in. the tutorial inputs went in left out right, i switched it in my pedal. so the input is coming in on the right side of the switch. i assumed the switch would work both ways. ive checked the power on the board. get good strong readings untill i get to the big cap in the right top corner.

i havnt gone through the sticky on debugging yet

[Wild E]

Switching sides is ok as long as it's done right.
From your pics I can see 1, maybe 2 problems.

1) top pic: There is no wire connected to the wiper (center lug) of the potentiometer on the right. If this is the vol pot that needs to connect to the bottom left lug in middle pic (not sure where the  present connection goes).

2) middle pic: From the angle of the pic it appears that your green jumper is connected to the two outside lugs of the middle row. If so, move it to the outside lugs of the top row.

As for the LED, I would need to see the bottom of the board, unless you left out the current limiting resistor. In that case you fried the LED.
I made that mistake once in a lighted switch.

[clamup1]

hey wild

1. thats the way the schematic had the pot laid out. ill have to try and find the schem.

2. no its attached to the top row. i put the wire in that way b/c it was easier to solder

3. there is a 1k resistor in the run. i may of put it on the wrong side of the led so it might be fried.

the funny part is this thing worked fine before i put the switch in.  so much for getting froggy

[deadastronaut]

follow what wild e said...

your pot on the right wont work otherwise...nor will the switch.....good advice....

normal pot wiring is this....

3 2 1...looking at the back with prongs facing down...in is 3.....2 is out..and sometimes 1 is ground.........

rob.

[clamup1]

This is the schem i was using
http://gaussmarkov.net/layouts/dod250/dod250-layout.png

ok so the out isnt on the board its from the pot.

ill give it a shot
thanks

[deadastronaut]

yep out from pin 2.middle one ok.........pin 1 to ground...

on your schematic the other pot pins 2 and 1 are joined together too.

to make your gain work properly ok...

good luck rob.

[clamup1]

got it thanks guys

[deadastronaut]

great is it working ok.....?

[Wild E]

Most schematics assume you know how to do offboard wiring (switches, jacks, etc.) As a rule there's always something connected to the middle lug of a pot. Also, double check the polarity of the LED. If it's backwards it won't work either. I forgot to mention that before.

[clamup1]

yeah i got the vol to work. thanks for your help. no i thought that the middle lug got left alone. oh well. ill rem that next go round.

i havnt got the led to to work. i put the meter to it in dc and it was running almost 20. does the power run from the input to the switch or the other way around? ive got the led lead running middle rung to a 1k to led (long lead-short lead) to sleeve of jack. ( i closed up the box) its run the way its run on the schem.

[Wild E]

If you're switching positive it goes from positive on board to switch to resistor to long lead of LED. Short lead of LED goes to ground.

[clamup1]

does it go to ground on the board or to the ground on the input jack?

[deadastronaut]

check out wiring a 3pdt switch .. google images it......all will be revealed.......

edit: as you are using the gaussmarkov design i take it you are going with this way of wiring your switch!.


http://www.google.co.uk/imgres?imgurl=http://gaussmarkov.net/images/1590B_SETUP_TRUEBYPASS.bmp&imgrefurl=http://gaussmarkov.net/wordpress/thoughts/wiring-up-a-1590b/&usg=__44YowIU3j3yudtBAFr5AReeejXk=&h=384&w=512&sz=577&hl=en&start=4&um=1&itbs=1&tbnid=8a1wVA3_XArRDM:&tbnh=98&tbnw=131&prev=/images%3Fq%3Dwiring%2Ba%2B3pdt%26um%3D1%26hl%3Den%26client%3Dopera%26sa%3DN%26rls%3Den%26tbs%3Disch:1

[Hides-His-Eyes]

does it go to ground on the board or to the ground on the input jack?

whatever's neat and convinient, they should all be joined together anyway.