Tube Screamer problem (tonepad.com)

[kickz28]

I read the "What to do when it doesn't work" post and here is a description of my problem.
The diagram I used is the newest Tubescreamer version on tonepad.com and TS-808 components. (http://www.tonepad.com/getFile.asp?id=81)
The PCB I ordered from tonepad.com and I didn't make it myself. I followed the plans 100% except for one thing: I used a 25k pot instead of 20k. To wire the switch, LED and jacks, I used this method: http://www.generalguitargadgets.com/diagrams/switch_lo_3pdt_tb_battery.gif
I used this method on an Orange Squeezer I built and it worked fine.
The pedal "works" when it is off. What I mean when I say it works is that I hear the sound. When I press the footswitch, I hear no sound whatsoever. The LED also functions properly.
I made sure all solder joints were good and that nothing was touching. The battery is brand new (reads about 9.2V on the voltmeter.... by the time I'm done taking the mesurements and done typing this post, its down to about 8.7K...went down a lot IMO... normal?).
When I plug in the battery, but nothing in the jacks, I always get 0V reading on the IC and transistors, but when I plug a cord into the input jack, I get some readings (more on these later). I tested all pots and the switch and they all work fine. I tried taking the complete circuit out of the box and it does the same thing. (the box is not shorting anything out). I noticed that when everything is plugged into the amp, and the pedal is on, that I can hear the radio in my amp when I touch some components. I can hear it loud when I touch the 100K pot.
Here are the voltages I measured on the IC and transistors.
IC:
1 2 3 4
5 6 7 8
(lug number 5 is the one beside the dot on the 4558 IC).
1: 8.7V
2: about 2.5V
3: 1.6V
4: 1.6V
5: 1.4V
6: 0.6V
7: 3.5V
8: 0V

The first transistor: (one on the most right in the diagram)
lug 1: (most left) : 8.6V
lug 2: (center) : 2.5V
lug 3 (right) : 2V

second transistor: (one on the left on the diagram):
lug 1: (most left) : 2V
lug 2: (center) : 2.5V
lug 3 (right) : 2.5V

Any help appreciated!
Thanks
Joey

Edit: I just tried wiring it directly (without a switch or a LED, direct to the input and output jacks and I have the same problem so I guess that eliminates the possibility that my switching system has a wiring problem.

Edit number 2: When I touch the 100K pot, I hear the radio really loud threw the amp, but touching the other pots doesn't do much. Also when I turn the 100K pot the volume gets louder or lower (I guess its normal since this is the level pot)

Edit number 3: Even with the IC out of its socket, I have the same problem. But I tried using another IC (same kind) and it didn't work either, so I don't think the IC is the problem.

[Steve C]

From your description the IC seems to be rotated 180 degrees.  The dot on the chip is designating pin 1, and not pin 5.

Pin 4 should be measuring 0 volts and pin 8 should be measuring pretty close to the battery voltage.

[kickz28]

I just tried rotating it and it still does the same thing. Are you sure about this though, because according to the diagram, I have it in the right direction, and pin 8 is connected to ground, which should be 0 volts, right?

Thanks!
Joey

[kickz28]

I tried building a audio probe as described here: http://www.diystompboxes.com/pedals/debug.html
I get sound when I touch pin 7 on the IC and then nothing after that (wether its switched 180 degrees or not).

Edit: I know the IC is not defective because I switched it with the one in my orange squeezer (which is the same IC) and the orange squeezer still works, and the TS still doesn't work.

Thanks!
joey

[kickz28]

I think I've figured out the problem!! I'll re-build the pedal in the enclosure with LED and switch to know for sure, but directly I get sound. I looked at how the IC is made in the datasheet and I found it a bit odd that I didn't get the same volts on lugs 6 and 7, and that I got a signal on lug 7 but not 6. So the only thats plugged directly to lug 6 was the 0.047uF capacitor, so I switched it out and now it appears to be working. I'll rebuild now to know for sure and I'll let you know.

Thanks!
Joey

[Fret Wire]

Here's the relationship bewteen the pin numbers and the dot, or circular cut-out on the 4558 type chip. The dot is by pin 1.

8 7 6 5
.
1 2 3 4

Go to GGG's 808 build instructions on this link. Scroll down to the bottom and there are voltages for the IC and transistors for you to compare with.
http://www.generalguitargadgets.com/index.php?option=com_wrapper&wrap=tscmr_inst

[cd]

FYI in this type of circuit the voltages on the opamp inputs and outputs (1,2,3 and 5,6,7) should all be approximately equal.  Off by .1V or so is typical (and OK) but more than that (like 3V and 1V) and you've got something wrong.

FYI #2 if you bought a tonepad.com board, you'd do best to contact Mr. tonepad.com directly since he doesn't read this forum anymore, and of course, you paid $$$ for the board, so you should get some service.