Rebote 2.5 stopped working

[jvanginkel]

I recently made a Rebote 2.5 with a daughter board that included the taptation stuff and a buffer for an effects loop. The pedal worked really well, beautiful delay, the taptation worked, the and the fx loop worked. Then all of a sudden, I got no more delay. After hours of debugging with no result, I took off the daughter board and isolated the rebote to see if the problem was my daughter board. Still, the Rebote on its own produces no delay. I audio probed it and got the delayed signal on pin 12, but nothing from pin 14. Here are my voltages.

PT2399
1- 4.47
2- 2.23
3- 0
4- 0
5- 2.27
6- 2.23
7- .25
8- .56
9- 2.15
10- 2.23
11- 2.23
12- 2.15
13- 3.19
14- 4.37
15- 2.14
16- 2.23

7805
8.58- 0-  4.47

tl072
1- 4.28
2- 4.28
3-4.24
4- 0
5- 3.44
6- 4.28
7- 4.28
8- 8.58

I've changed all the filter caps, remelted everything, I'm just lost as to what to do next (except try another PT2399, but I am hearing some delay on pin 12 and I don't really want to order another chip if its not going to help).

[R O Tiree]

Pin14 of the PT2399 is well out to lunch... almost at Vcc for the chip. This might imply that a component connected to it has failed. I'd look at replacing all components connected to pins 13-16 as far back as the feedback pot and then, if that doesn't work, try another delay chip. Remember to use extra flux when removing components - this will enable you to get them out quickly and avoid frying (literally) the delay chip and the PCB tracks.

[jvanginkel]

Thanks so much for the reply. I will start replacing those parts. I have the pt2399 socketed, so I'll just remove it while I replace the other parts to avoid the frying the chip. I have already fried and lifted some of the eyelets replacing other parts, so I clearly need the advice on getting things out quickly and cleanly.

[jvanginkel]

So I changed out the pots and resistors from pin 13 to 16, back to the feedback pot and I had no change, so I ordered a new pt2399 from small bear today. I hate paying shipping for one item, but I have to get over it. Thanks for your help.

[jvanginkel]

So I got the new pt2399 yesterday and I just put it in and my voltages look normal. I can plug a guitar into it until later, but here are my new voltages for the PT2399

1- 4.93
2- 2.5
3- 0
4- 0
5- 2.69
6- 2.59
7- .3
8- .98
9- 2.72
10- 2.74
11- 2.74
12- 2.75
13- 2.76
14- 2.76
15- 2.76
16- 2.76

I'll post an update after I try it out. Thanks again for the help, I would have waited forever to order a new chip, its never the components' fault when I make pedals, it's always something I did wrong, so this was surprising.