hearthrob screw up...advice please??

[vacuumdust]

I tried to add a blinking LED to my hearthrob last night and I obviously messed it up.   The end result is I now get perfect signal through the effect but no modulation.  I got the LED to light up but it's a steady light which makes sense since there is no modulation.  I thought at first that I fried Q3 but it still doesn't trem with Q3 replaced.  So I'm guessing I fried something else in the LFO section of the effect since it passes signal perfectly but no trem effect.  I guess my question is:  what Q or Q's are related to the LFO section so I can start trouble shooting there...I suppose I could have toasted a cap too but usually you can smell that.  THANKS

[markm]

Where did you connect the LED?
This is probably the cause of the problem, remove it from the circuit and see if the LFO then LFO's.

[vacuumdust]

The LED was already out by the time I plugged the pedal back in.  I think I had it backwards now.  I had the anode to C of Q4 and the cathode to ground...I think it's supposed to be the other way around.  So yeah, that's what I did.  I had the longer lead of the LED to C of Q4 through a 3K3 resistor and the short lead to ground...made more sense to me that way but apparently not??  So when I did this I got no light at all.  So I kept the short lead at ground and touched the long lead to the C of Q3 and got the steady light.  So I went back to Q4 again, this time without the resistor(no idea why I did this) to the same result...no light.  Then back to Q3 sans resistor and promply fried the LED. So I just took it out all together and went back to playing where I realized the pedal no longer worked correctly.  So, me dumb.

[markm]

This is from another post. This is my method, maybe this will work;

Place the cathode end at the collector of Q4 and the anode at ground.
This will give you the blinking LED.
To have the LED double as a status indicator as well, just attach the anode to the switch as normal. When engaged the LED will blink
when disengaged, the LED will be off.

[cab42]

I did it this way (also from an earlier post):

you can get this effect connecting the cathode of a LED to the collector of Q4 and the anode to battery + with a suitable resistor in between. As far as I can hear it doesn't affect the sound.

I got this idea from the EA tremolo schematic at Runoffgroove.com

Regards

Carsten

[markm]

I got this idea from the EA tremolo schematic at Runoffgroove.com

Not me, I thought of this myself!   
Just kidding, I modeled it right after the ROG EA build!