Barracuda Legend Kit Problems

[Impulse]

the speaker is the buzzer i had in the kit and yes the threshold is just before the constant tone (stable)

[Old cart]

What are you using for a speaker? Do you run it with a threshold ( low steady tone).

[Impulse]

here is the setup




with nothing changed i have 4" clear signal, 5" almost and 6" slight

[Impulse]

ok i have time, use a ring for the depth test ?

[Old cart]

Sorry meant depth test...if you have time we can debug now.

[Impulse]

yep i have checked the resistor clearances i have also tried a new 412cn 7660 5534 nothing changed the circuit is at max trim delay

here

[Old cart]

Try it at max delay. It still appears that the sample pulse generator is not quite right. Did you check for the shorting resistors I mentioned above? If you have then let me know and we can try to debug that circuit.

[Impulse]

yes detector is working not great but is working

1k -

Max -

[Old cart]

Heres the 40106 pin2 and 5534 pin6

[ATTACH]35343[/ATTACH]

now try adjust the delay pot to near both ends of it taking two pictures one near each end.mThis still does not look right. Is the detector working?

[Impulse]

Heres the 40106 pin2 and 5534 pin6

[Old cart]

OK better, follow the items in #133, then leave this probe as is and add a second probe on pin 6 to the 5534. we need to see the relative timing. As usual we will need to see that trace. Sorry this is such a pain but it is hard to troubleshoot without "seeing"!

[Impulse]

Hey guys i have changed the 40106 to a differnt one and this is the resault at pin2

here

[Impulse]

ok i will try this later i have 2 i can try

[6666]

try switching out the 40106

I've found a few faulty ones over the years, they seem to get damaged easily and are sold faulty, maybe bad anti static handling.

[Old cart]

Ok so i have set the delay trim to 12k Ohms, i have also put the scope on the Gates of top and bottom FETs circled [ATTACH]35333[/ATTACH]

here [ATTACH]35334[/ATTACH]

Can you repeat at 200uS/ div? These still look wrong to me, I do not understand the first wider pulse or the pulse not being rectangular. Perhaps Kt315 or others can comment whether this is normal for a gate pulse.

If it is easy you might also be wise to try switching out the 40106. Those two gate pulse should not look the same. The second one should occur maybe 100 uS later than the first repeated at 600 Hz. Also check the power leads where they solder to the board, the joints look like crystals in the photos. Just reheat them and add a little solder. Check the whole board for cold solder joints. Check for any solder bridges and components that may have leads touching (r17 and 19 look close) on the component side of the board, focus on the area around the 40106. Something seems funny.