sundance-communications.com/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Partner 206

In reading a post that started out on the protege it turned to a comparision of other systems. One of the posts complained about static on 206 stations. This is a common problem with a simple solution. When you send one in for repair request that the people doing the repair check for weak transistors in ALL the ports not just repair the one with static. These transistors will fail one after another in time and can keep you returning over and over for a new static filled station.

Actually, I have fixed dozens of 206 cards with static and it is almost always the same problem.

As long as it is "scratchy" and not "whiny" it's likely electrolyte leaking from the larger brown capacitors. The electrolyte is conductive and will cause the board itself to conduct.

To see the problem, open up the case and leave the board in the thinner of the two pieces, put it into a 2 slot carrier with an ACS installed and power it up. BE CAREFUL, the outlet in your home is 120v and there is up to 150v in a 206.

With a DMM, place the black probe on ground (the green wire). Then take the red probe with the meter set 200V and touch it to the actual board near the larger brown capacitors. The caps are marked with the would be extension number (i.e. Cxx.10 is on port 1, Cxx.11 is on port 2). You will be very surprised at the voltages you will see in the middle of the board without touching any components. I've seen 140V centimeters away from any capacitor.

The solution? Q-tips and alcohol works for me. Power it down, wherever you saw significant voltage on the green board clean it and dry it, make sure it's dry, power it up and check for conductivity. The electrolyte does spread pretty far so be sure to check a wide area around the caps.

If you want to do it right, replace all of the brown capacitors on the extension ports because they ARE leaking. You can expect problems down the road if you don't, but it may go years without a problem.

Also, I've powered up 206s that had all dead ports which, after cleaning the board, came back 100% working with no static.

I know this post was 5 years old but I figured some people out there will still find it useful.

Wow! My first take has always been to perform board-level repairs. But I gotta be honest, I've been pretty snooty about touching Partner boards.

Forget how old these posts are--THIS cat learned two very good lessons about low-level repair on 206 blades...and all in the last 15 minutes. Thanks, guys.

Sometimes these SMT transistor can be tricky to test even with a huntron test set, it will test good on Emitter base and collector even the HFE is right, but as soon as you put load in it. it will be noisy as hell. Sure does they fail one after another also check the resistors around it for open, these are the 68 Ohms and 100 ohms ones.