Contact : Chris Edwards
The only way to adjust the volume, is HARDWARE mod., or upgrade to Newer Model CS750.
To adjust the volume of CS700 = upgrade to CS750 = $60.00 send unit to Connect Systems
- Only FIX is an upgrade to the new model CS750 !!!
CS 700 External Sp/Mic microphone low audio fix
1) Remove the 5 screws holding the external mic. together. Remove back cover.
2) Gently but firmly take out the Mic. (by pulling it from the wires), located in upper right corner above the PTT. Clean and enlarge the 2 small holes in the plastic housing if needed.
3) Take out the small circuit board holding the PTT switch.With a soldering iron, remove the little 0402 resistor located on the back of the board. (You can solder it on a side if you don't want to lose it, if you ever want to put it back. You just need sharp tweezers.).
4) Put everything back. It is OK if you don't push the mic completely into the slot, so that it has about 1/16 inch gap to the bottom of location.
I can talk into that mic in normal voice now, and nobody will say it is to low. Before, I had to shout waking up all neighbors, and it was still to low. So i stopped using external mic. until now.
Here is a photo of the removed resistor soldered on a side. See inside the red circle, that is where the resistor was:
