sundance-communications.com/forum Forums General General Telephone & Systems Information TS22A problems after battery replacement

More news.
I have found that the amplifier chip is not the issue. I have tried 3 different versions of the same chip, all compatible with the original, and there was no correction or alteration of the failure. For my next attempt, I will be replacing the "latch" IC, which is actually a 74HC4520 binary counter chip.

I will get this figured out and share the correct fix, so places who won't share their fix, can go *long and descriptive expletive deleted.*

Is it within the rules to point out companies who act like this? I would love to, but I don't want to get in trouble here! Let me know if it's ok, and I will drop their name. I will share that they have a youtube channel with comments disabled.

We probably don't want to flame other companies on here, but I hear your frustration! You ultimate solution will be much appreciated on the public record

Correction:
The IC is an HC4051A. I got confused between datasheets. It is an analog multiplexer/demultiplexer chip. There are 2 of them on the daughter board that controls the speakerphone.