Please help! Collosalus 2015 (no flange)(solved)

[samsagreg]

Collosalus ver.2015 (C22 is not connected to GND in My PCB)

I completed this about 2 week ago.
But flange effect didn't work.


I'm not sure 'MN3007 is not fake'.

first MN3007 is Ebay Chinese seller's.

Ebay Chinese seller's MN3007(5ea) is junk I think.
No flange sound,Just no effecting guitar sound.
when install the chinese 3007, voltage value was changed.(Voltage of all pins became down)

Then I installed Ebay English seller's 3007(2ea).
It wasn't changed voltage value, but it made bigger noise than guitar sound.(Like BOO~~~~~~OOO~~)
and it heat too much. hotter than 7815.

Now I am waiting to arrive another MN3007(GmbH: Banzai Music's).
Where do you buy MN3007? Do you know GmbH's one is working?


Now I think '3007 is trouble'.
but I'm not sure.

So could you advice something about my problem?


Anyway
I checked IC Voltage value. (English seller's MN3007)

IC1,IC2,IC3,IC5 is almost same volatage value.


IC4 JRC4558D         Correct Voltage
1- 12.69                  7.06
2- 12.69                  7.06
3- 12.60                  6.99
4- 0                         0
5- 7.42                    7.38
6- 7.54                    7.41
7- 7.51                    7.41
8- 14.91                  14.82
Pin1,2,3 have different voltage
So I checked Pin3-> R26, R47, R27. They was right value.(R26 = R47 = 470K, R27 = 100K)
I don't know why, I tried to change other Jrc4558, rc4558, KIA4558.
Pin1,2,3 were similar value in any OPAMP.


IC6 HEF4013BP
Just pin5 was different. It was 7.45V. Guide value is 0V.
So I checked schematics, Pin2 is connected Pin5, so I think it's not problem.(Pin2 voltage was correct)



IC7 7815       correct Voltage 
1- 17.8                 21.8
2- 0                      0
3- 14.92               14.82
(I used 9V power, so I guess this is reason for difference.)



IC8 LT1054     correct Voltage 
1- 1.41              1.42
2- 4.95              6.33
3- 0                   0
4- 5.6m             7m
5- 0                  100m
6- 2.5               2.34
7- 1.4               1.46
8- 9                  12
(I used 9V power, so I guess this is reason for difference.)



IC9 MN3007     Correct Voltage
1- 14.91            14.81   
2- 7.14              7.37
3- 6.25              6.12
4- 1.5                1.54
5- 0                   0
6- 7.2                7.37
7- 14.73            4.7~5.67
8- 14.73            4.7~5.67
I set Pin3 Voltage 6.25v.(I set the Bias trimmer.)

Pin 7,8 was incorrent value. And it was the same value when uninstall 3007.
So I tried to change R33=47K.
when R33 is 10M, Pin7,8 voltage was 5.3V. But flange was not working(Chinese one didn't working too.)

[NFX]

mmm try reflow the solder, i suspect a bridge somewhere. i have built this many times for people, let me know how you get on also post some clear images front an back of pcb

[samsagreg]

Thanks NFX


Here is photos. I don't know how to show these image in this page. Just hiperlink. Sorry about that.
https://drive.google.com/open?id=0B6zKXbi7qzh0b0h2OWI4T1pXVTQ
https://drive.google.com/open?id=0B6zKXbi7qzh0Z3JYLUwxNTN4bEU
https://drive.google.com/open?id=0B6zKXbi7qzh0VkpfaUV0N04xTnM
https://drive.google.com/open?id=0B6zKXbi7qzh0MnNaSkptUkJPcnc
https://drive.google.com/open?id=0B6zKXbi7qzh0Q1ZIbHJuNm9hZ1E
https://drive.google.com/open?id=0B6zKXbi7qzh0ai1NNWc3dHliQ0E

reflow and then check, but nothing change still no flange and  'Boo~' noise.

[NFX]

ok had a look through, trim pots look at the right positions, couldn't see the feedback trim at the top of the board, anyway that should be set around 11 o clock. 1 bit that looks suspicious on the back on your voltage reg IC, everything else looks ok.



Have you used bipolar caps by mistake--at C21, 6, 28, 15,  they look like them from the pictures

[samsagreg]

Thanks NFX
I have set the feedback trim pot.
And I have resoldered 7815 and check to be connected GND. not connected pin 1 and 2 and 3 (7815's).
I tested that, not change. still no flange and noise.

And I don't have non-bipolar caps now.
So if I have them, I will change, then will report the situation.
Anyway Thanks a lot ^^.

[samsagreg]

I've changed  C21, 6, 28, 15 to non-bipolar caps,
But still doesn't work. not change.

[NFX]

ok, i will take another look, maybe i have missed something.

[pedalhealer]

ok, i will take another look, maybe i have missed something.

Check this topic: http://www.madbeanpedals.com/forum/index.php?topic=16719.msg191912#msg191912

Check C22.

[samsagreg]

Thanks, eldzsi
I checked C22, C22 is not go to ground.
and I've tried to remove c22, but flange was not working.
Anyway Thanks.^^

[samsagreg]

Problem solved!

Fake MN3007.
That was the problem.

Banzai Music's 3007 is worked.
Collosalus is wonderful.
It turns into various flange tones.

Anyway NFX, eldzsi, 
Thank you for your attention.^^