CE-2 depth pot(?) not working

Started by moro, November 21, 2007, 02:35:38 PM

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moro

Hello,

I just built a CE-2 from the Tonepad layout and it works, but the effect is very subtle. It looks like my depth pot isn't working. Here are my voltages:

4558
1: 5.5
2: 5.6
3: 5.5
4: 0.0
5: 5.0
6: 5.5
7: 5.5
8: 9.4

TL022
1: 9.3
2: 9.4
3: 5.4

4: 0.0
5: 9.4
6: 3.4
7: 8.7
8: 9.4

MN3007
1: 9.3
2: 4.9
3: 4.8
4: 0.6
5: 0.0
6: 4.8
7: 4.9
8: 4.9

MN3101
1: 9.3
2: 4.8
3: 0.0
4: 4.8
5: 0.4
6: 7.7
7: 3.7
8: 0.6

Q1
C: 9.4
B: 4.9
E: 4.5

Q2
C: 9.4
B: 5.4
E: 4.8

Q3
C: 9.4
B: 5.0
E: 4.6

Q4
C: 4.3
B: 8.2
E: 7.7


Q5
C: 7.0
B: 0.5
E: 0.0

I've marked what I think are the problem areas in red. In particular, I think the voltages on pins 1, 3, and 7 of the TL022 are supposed the change depending on the position of the depth pot, but they don't. They're stuck at the values I noted above. The pot itself seems to be working. Is there some obvious mistake I should be looking for? Thanks.

moro

Figured out what was wrong. The usual suspect--a solder bridge. :icon_eek:

And wow, this is an amazing sounding pedal!

MartyMart

Did you install the "vibtrato" switch ? VERY useful and a great sounding CE-2 :D
MM.
"Success is the ability to go from one failure to another with no loss of enthusiasm"
My Website www.martinlister.com

moro

Quote from: MartyMart on November 22, 2007, 04:54:13 AM
Did you install the "vibtrato" switch ? VERY useful and a great sounding CE-2 :D
MM.

This seemed like a pretty complex build as it was, so I didn't do any mods. Also, I had a really nice enclosure for so I didn't want to go drilling a bunch of extra holes. (Honestly, I was more interested in the effect level mod.)