Hi everybody!
My name is Lars, I'm from Stockholm, Sweden. I've lurked on this forum for a year and a half
on a daily basis. I've built over sixty pedals since then, with no prior experience of
electronics whatsoever (I'm a psychologist). Everything I know about this I've learned from
you. I started out building from vero layouts by Torchy, Dragonfly, Marty, Slacker (loved the
EchoBase!!!) et al, then I started making my own vero layouts using Bancika's eminent
software. I've stuck to vero, since I have small children around and don't want to mess
around with the chemicals necessary for etching.
Vero has worked real well for me, and I've managed to build some rather big and complicated
circuits without much trouble. Among others I've built the following: Rebote 2.5, Small
Clone, Mu-Tron III, Meatball, Bassballs, Phase 90, Highway 89, BSIAB2, Big Muff, Vanishing
point and lots more - all sounding great.
All in all, I've had a great eighteen months on this forum, I have learned an immense lot
about the craft and the results have been overwhelming. Thank you!
I had planned to introduce myself to the forum as soon as I felt I could contribute
something, a nice vero layout maybe, but haven't really gotten around to it yet. So I'll
start with a call for help (maybe there's a nice vero layout in this after all...).
I spent christmas up north away from computers, and between meals I drew some layouts with
pen and paper. I'm still putting the finishing touches on a Neovibe vero, ant that's a big
one! I also did the CE-2 using the scematic at Tonepad, and as soon as I got back to
civilisation I started building - real eager since I loved the Heladito/Small Clone I did
last spring.
And I ran into trouble... I've had some lengthy debug sessions before, and can be pretty
stubborn. I have gotten all my prior builds to work eventually. Once I tore down a board
three times only to find a dead volume pot at the end of the week or so of tearing my hair

But this chorus has me super-stumped. The layout seems good to me (if a little large and
jumper-heavy), I've checked and checked, but I can't get my head around some of the voltages.
Can anyone help?
Pictures of my hand-drawn vero layout and the board can be seen here (hope I get this right):
[img=http://img222.imageshack.us/img222/2899/ce2veroboardlt7.jpg][img=http://img222.imageshack.us/img222/2972/ce2boardme1.jpg]And here's the sad facts:
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1.What does it do, not do, and sound like?
Weak chorusing effect, hardly noticeable with speed and depth cranked, weird voltages on the MN3007 and MN3101, see below.
All controls seem to work as they should. No distortion on the output, hardly any clock noise.
2.Name of the circuit =
Boss CE-2 chorus, Corrrral Chorus
3.Source of the circuit (URL of schematic or project) =
http://www.tonepad.com/getFile.asp?id=101I made my own veroboard layout, see:
[img=http://img222.imageshack.us/img222/2899/ce2veroboardlt7.jpg]4.Any modifications to the circuit?
Vibrato Mod
Wet bass switching mod
Effect level mod
Chorus intensity cap switch mod
(as per the Tonepad project instructions)
5.Any parts substitutions?
TL062 substituted for the original TL022 (IC2), I also tried a TL072 with no noticeable difference.
11v zener diode instead of the RD11B.
(these subs have worked for many others on the forum)
6.Positive ground to negative ground conversion?
N/A
7. Voltages:
Battery= 9.3v
IC1 (4558)
1= 6.1v
2= 6.1v
3= 6.1v
4= 0v
5= 6.1v
6= 6.1v
7= 6.1v
8= 9.3v
IC2 (TL062)
1= VAR
2= 4.6v
3= VAR
4= 0V
5= 4.5v
6= 4.6v
7= VAR
8= 9.2v
IC3 (MN3007)
1= 9.0v
2= 13.7v (!!!)
3= 5.3v
4= 0.6v
5= 0v
6= 13.3v (!!!)
7= 4.7v (?)
8= 4.7v (?)
IC4 (MN3101)
1= 9.0v
2= 13v (!!!)
3= 0v
4= 13v (!!!)
5= 0.6v
6= 8.7v
7= 3.7v
8= 0.6v
Q1
C= 9.3v
B= 5.2v
E= 4.8v
Q2
C= 9.2v
B= 5.8v
E= 5.3v
Q3
C= 9.2v
B= 5.4v
E= 5.0v
Q4
C= 9.0v
B= VAR (?)
E= VAR (?)
Q5
C= 7.3v (fluctuates a little)
B= 0.6v
E= 0v
Obiously something is very wrong here, but I cannot find it nor figure it out. Go ahead - make me feel stupid

Debugging performed: Went through the board several times, can't find any components in the
wrong places, no solder bridges. I reflowed every solder joint. Electrolytics and diodes have
the right orientation. I read through lots and lots of posts, learned a lot about the
circuit, but found no mention of those weird voltages. I even tried to lift the eigth pin of
the 3101 (bad batch theory) - no go. Stumped. Utterly and terribly stumped...
And finally - if you don't want to end up like this: BUY YOUR PCB:S FROM TONEPAD! They're
great, and vero can be hazardous to your mental health

Thanks for your time,
LARS