Not having too much luck with this pedal I bought as a project. I am able to get power and bypass but no actual signal when its switched ON. I did take it to a shop to have it looked at and had a resistor replaced and things cleaned up a bit (thats what got the bypass working) but still not working as intended.

This is the data sheet I followed: https://www.diyguitarpedals.com.au/shop/boms/Lich King Chorus.pdf

 

The article says that fake copies of obsolete ICs are available.

 

I know that it doesn’t help with the current project, but if you need an IC for a delay line, this one is pretty good.
https://www.princeton.com.tw/Portals/0/activeforums_Attach/PT2399-s.pdf?ver=VCNjyppxSkcpF5f5qhgQ1w==

 

Since it is well documented with circuit schematics, we should be able to help you with this.

The test equipment of choice for situations such as this is an oscilloscope. If you don't have this, then you would need a DMM and perhaps a powered computer speaker.

 

For locating the problem, it is best to start at the input and follow the circuit with a scope to se where it stops. In a guitar pedal you may have a broken connection or even a cracked trace on the PCB. Or even a damaged IN/OUT switch.