A/DA Flanger Need Help Effect Doesn't Works

[Zipporello]

i've finally check all IC's voltage:

Q1
C = 11.90
B = 9.80
E = 11.91


IC1
P1  11.66
P2  11.63
P3  10.84
P4  13.00
P5  6.11
P6  12.06
P7  12.26
P8  12.36
P9  12.28
P10 12.12
P11 0.00
P12 0.00
P13 12.05
P14 0.00

IC2
P1  4.30
P2  11.96
P3  4.16
P4  12.69
P5  12.69
P6  12.29
P7  12.29
P8  12.33
P9  11.93
P10 12.26
P11 0.00
P12 12.23
P13 11.78
P14 11.98

IC3
P1  7.09
P2  3.57
P3  3.50
P4  13.00
P5  5.91
P6  11.98
P7  13.27
P8  11.18
P9  5.66
P10 11.38
P11 0.00
P12 12.13
P13 11.33
P14 11.90

IC4
P1  12.30
P2  3.63
P3  12.07
P4  0.00
P5  7.41
P6  13.05
P7  1.71
P8  12.84

IC5
P1  0.00
P2  0.00
P3  0.00
P4  0.00
P5  0.00
P6  0.00
P7  0.00
P8  0.00
P9  4.42
P10 12.88
P11 4.30
P12 7.51
P13 12.76
P14 12.75

IC6
P1  5.01
P2  7.47
P3  increasing
P4  12.22
P5  12.11
P6  11.67
P7  0.00
P8  0.00
P9  0.00
P10 5.68
P11 4.75
P12 0.00
P13 5.00
P14 12.02

IC7
P1  15.23
P2  0.00
P3  13.12

IC9
P1  13.13
P2  3.64
P3  6.56
P4  6.56
P5  6.57
P6  6.56
P7  6.57
P8  0.00
P9  6.57
P10 6.56
P11 6.57
P12 6.56
P13 0.00
P14 6.56
P15 6.56
P16 0.00

IC10
P1  12.91
P2  6.56
P3  11.21
P4  0.81
P5  0.00
P6  6.55
P7  8.54
P8  8.54

any suggestion? 

[Fender3D]

Please, don't ask me to check if sabro's layout is ok...
I'm too lazy for that.. and I hate stripboards

You have major issues with quad op-amps for sure...
IC2b feeds the ref. voltage to circuit; it should be 1/2 V+
Then every op-amp, IC1b aside, should refer to that voltage and you should measure similar voltages on their signal pins.

You're feeding 15V to a 15V regulator... its voltage drop give you those ~13V, but this will just limit the full VCO range and won't prevent the pedal from functioning...

IC4 is not working, maybe because pin 6 is higher than pin 8?

Q1 has no B,C,E it has S,G,D. if you put there a normal bipolar it won't work.

There may be other stuff going on there... these are just the first which come to mind at a first glance...

This is a complex circuit, if you don't understand well how each functional block works, you'll have an hard time debugging it...

If I were in your shoes, I'd separate and check each single circuit block.
Charlie's (moosapotamus) schematic is well drawn and easy to understand.

[Zipporello]

thanks.

i'm sorry for the wrong diciture of the transistor, i'm actually use a PN4393, like the schematics.

i think the major problem is the voltage supply. This week i'll made a 18V power supply.

maybe IC4 doesnt work cause the low voltage (<15V on the LM7815 regulator).

You have major issues with quad op-amps for sure...
IC2b feeds the ref. voltage to circuit; it should be 1/2 V+
Then every op-amp, IC1b aside, should refer to that voltage and you should measure similar voltages on their signal pins.

i don't understand. sorry 

[armdnrdy]

The jack in the link that you posted is not the correct jack. That is a switched tip jack.

You need a switched ring jack....or the more common switched TRS jack to where the tip, ring, and sleeve are switched.

[Zipporello]

The jack in the link that you posted is not the correct jack. That is a switched tip jack.

You need a switched ring jack....or the more common switched TRS jack to where the tip, ring, and sleeve are switched.

damn. thanks.

by the way, can i use the tip jack however? (switching the connesction?)

please, some one can post a image of the correct jack and its configuration? 

[armdnrdy]

Use the correct jack.
You can find one by searching the net....they are very common.

A TRS switched jack.

Tip goes to R50
Ring connects to wiper (lug 2) of P3 (Manual)
Ring switch goes to R53

[moosapotamus]

Here are a couple types that would work...
http://www.mouser.com/ProductDetail/Neutrik/NMJ6HCD2/?qs=sGAEpiMZZMv0W4pxf2HiV5kIvuq9GNdIXM8aWl3faEo%3d
http://www.mouser.com/ProductDetail/Switchcraft/14B/?qs=sGAEpiMZZMtUpMOmSPzkH%2fi%2f1KDxchf7

These jacks have both a ring switch and a tip switch. Just don't use the tip switch. In my experience, jacks with only a ring switch are impossible to find.

~ Charlie

[Zipporello]

mine: http://imageshack.com/a/img199/1016/xtbc.jpg

red wire (manual sweep ring): jack's ring
black wire (manual swee tip): jack's tip
green wire (manual pot): jack's tip switch



[edit] i've forgot to upload the picture 

[moosapotamus]

Just a suggestion... Do not even install the manual exp jack (connect the wiper of P3 (manual) to R53) until you get everything else working.

~ Charlie

[Zipporello]

Just a suggestion... Do not even install the manual exp jack (connect the wiper of P3 (manual) to R53) until you get everything else working.

~ Charlie

you're right.  

i've bought a new set of IC's. while i'm waiting, i'll check again all components, voltage and soldering.

My Vb it's a little bit high (11.5V instead 7V). damn....

[edit] Vb will be around 7V right?

[Zipporello]

Just a suggestion... Do not even install the manual exp jack (connect the wiper of P3 (manual) to R53) until you get everything else working.

~ Charlie

you're right.  

i've bought a new set of IC's. while i'm waiting, i'll check again all components, voltage and soldering.

My Vb it's a little bit high (11.5V instead 7V). damn....

[edit] Vb will be around 7V right?

no one? 

[armdnrdy]

Voltages from a working build are posted here:

http://www.diystompboxes.com/smfforum/index.php?topic=74367.msg710731#msg710731

Posts 213 and 217.

[Zipporello]

Voltages from a working build are posted here:

http://www.diystompboxes.com/smfforum/index.php?topic=74367.msg710731#msg710731

Posts 213 and 217.

really thanks.

finally i've seen that the three TL074 have wrong voltage values.

i only don't understand this: "The reality; when viewed on a 'scope; is these V's are ALL 15V (Supply V), regardless of f. CMOS gives you the rails out." what does it mean?

[armdnrdy]

Use the "working" voltages compared to yours to go through your build to identify the problem areas.

Search through the problem areas for the cause of the problem.

You'll find a trace that hasn't been cut, a solder bridge, or some other problem, no matter how many times you've gone through it and it appears to be in order. 

This I know from experience. 

[Zipporello]

Use the "working" voltages compared to yours to go through your build to identify the problem areas.

Search through the problem areas for the cause of the problem.

You'll find a trace that hasn't been cut, a solder bridge, or some other problem, no matter how many times you've gone through it and it appears to be in order. 

This I know from experience. 

thanks for your patience.

i've checked the circuit and the schematics and i notice several missing bridge. i'll fix them soon.
But, i 've noticed the most importante error: the in-famous Vb. it's nearly twice the optimal value.

I think this voltage value is imposed from somewhere within the circuit, but i did't find. There's some one can help me?

Only want to know the voltage partition or whatever fix the Vb to 7V.

Maybe it's the origin of all my problem.

really really really thanks. 

[armdnrdy]

Trace the entire VB path of your build (everything that connects to VB) against the schematic until you find the problem.

If your entire VB rail is off, the problem can be anywhere....so I don't believe that anyone can pin point the issue without physically going through the build.

[StephenGiles]

Trace the entire VB path of your build (everything that connects to VB) against the schematic until you find the problem.

If your entire VB rail is off, the problem can be anywhere....so I don't believe that anyone can pin point the issue without physically going through the build.

Absolutely right, this circuit is one that needs building in sections to make sure that each is working before moving on to the next, because troubleshooting a complete build is a nightmare - ah, I see that Fender3D has already said that!

and.........

I always have an output test lead with a jack socket on one end and two fly leads with crocodile clips on the other, in order to test the output at various points through the circuit. An additional wire with croc clips on both ends is good for bypassing BBD sockets - because you have removed it for this test haven't you 

Also very important - TEST WITH BATTERIES 

[Govmnt_Lacky]

i've checked the circuit and the schematics and i notice several missing bridge. i'll fix them soon.

This sums it ALL up.

Like I always say... you have to FIX the problems you find BEFORE moving on to the next one.

Fix problem.... TEST.... Fix problem..... TEST.... Rinse & Repeat until no more problems! 

[Zipporello]

hi all

finally i've fix all the problem: fat soldering cause some short circuit.

And i've substitute all IC's.

Really really thanks all for your patience!

[armdnrdy]

You've fixed all of the problems but.....does it work? 

Have you calibrated it yet?