SOLVED 5 lb fuzz problem

[mycroftic]

Hello,I'd been on a good building roll until I hit this problem. I get a full signal when bypassed but when engaged there is a very weak clean guitar signal and some background white noise that changes when the knobs are rotated. I used an AN307 for D2 but wasn't sure which side the cathode was on so I tried both directions but still no fuzz.I tried two different NE5532 chips from two different suppliers and I get the same readings. Any help will be appreciated

pin1 3.03
pin2 3.03
pin3 3.03
pin4 0
pin5 2.92
pin6 3.03
pin7 3.08
pin8 6.27

 

[mycroftic]

I replaced the two 2n3906 and two 2n7000 transistors but still no fuzz. Tomorrow I'll take the board out and reflow the solders.

 

[chris.knudson]

I replaced the two 2n3906 and two 2n7000 transistors but still no fuzz. Tomorrow I'll take the board out and reflow the solders.

Post photos of both sides of the board, and I'll see if I can help you.

 

[mycroftic]

Thank you!

 

[chris.knudson]

Did you reflow the board -- There are some solder joints that look like they may be cold solder joints -- in particular the pots, and especially the 50K pot in the middle of the board.

 

[mycroftic]

I'll reflow solder joints tonight. Thank you.

 

[mycroftic]

I reflowed the solder joints last night and tried it out this morning but still no fuzz.

 

[mycroftic]

Jjust to be sure the AN307 diode was not bad I used a 1n4148 but that was not the problem.

 

[Robert]

I assume you've tried adjusting the trim pot?

 

[mycroftic]

Yes I have . Thank you for the reply.

 

[Mcknib]

R6 should be 470R it looks like 470K that's going to affect the biasing

 

[mycroftic]

Thank you so much Mcknib it works now!