Pork Barrel Chorus without vibe

[desmoben]

Hello all,
bad news, the new IC does not work (sound on IC pin 3 of regular guitar, no sound on IC pin 6).
I have checked all connection to check the pcb.
Everything that is connected to each pin of the IC4 is OK
(pin 1 to IC3 pin1
pin2 to IC3 pin 4
pin3 to R19
pin4 to both C132+ and IC3 pin 8
pin 5 to ground
pin 6 to IC3 pin2
pin7 to pin8 to R20

VD 9.35V
9V 9.43V

What other tests can I do?
Whats going wrong with that pork barrel?
Thanks in advance for any help...

[gtr2]

Does it have a high pitched squeal on pin 6 when listening with an audio probe?

[desmoben]

No, I have just a crack when I touch the pin and then nothing...
:-(

I don't really know what to test now...

voltages at IC4:

from 1 to 8
9,32
4,53
5,22
8,69
0
4,51
7,54
7,54

Any help please ....

[gtr2]

woops totally disregard my previous statement...

Your output is pin 7 and 8 of the mn3007.  This is where you should have a signal.  Maybe a problem with the clock?

I may not be much help.  I have not built the pork barrel, hopefully someone who is more familiar with the circuit can chime in...

[desmoben]

When you say problem with the clock, you mean that maybe IC3 is wrong?
(at the origin, both IC3 and 4 were received nearly broken... I supposed that IC4 was KO but with a new IC4 same result.
Maybe problem is linked to IC3 and I should buy one to test it?

What can I do

[jkokura]

Have you verified that you don't have a power to Ground issue still?

Anytime you have a hot battery, that means you have power leaking straight to ground and you have to solve that problem first. Using a powersupply might make it seem like the problem has left, but unless you have verified the problem to be fixed, all the other suggestions I make will be meaningless.

Jacob

[desmoben]

Hi,
in fact the batterie was high due to wrong D3 (I inverted it)
So I fixed this problem, and I have no more batterie getting hot.
Now I have plug either the batterie or the boss adapter, btu as batterie just deliver 8V, someone ask to put a "real" 9V in so I plus the boss adapter.

Could you please suggest other tests to perform?

May IC3 be broken?

[jkokura]

Sounds like it may be the issue, so check things out when you have your replacements in stock.

Jacob

[desmoben]

Yes, that was the issue.
At least with that problem I have built my audio probe and will be helpfull with other debugging.
Thanks for your help.