Some time ago, I was faced with problems using Cisco IP Phones handsets.
After doing some online research, we found "solutions" with scotch tape or washers..
We tried these solutions, but the problem always reappeared again.
So I decided to crack the nut with a sledgehammer...
...and contacted our eletronic engineer for designing a new PCB with a reasonable switch.
After some discussions, he made me aware of a "special technique" he used many years ago for repairing audio components.
What should I say...it works like a charm!
Here we go
You need the following tools:
- Pencil
- Phillips screwdriver
- Slotted screwdriver (optional)
Disassemble the Cisco IP Phone 7941, following these steps:
Remove the 4 screws
Lift the cover and pull a little bit
Lift the cover with the slotted screwdriver as shown,
while pulling it back with the other hand.
Reason: there are barbed hooks placed in the middle
and yes, you can open it with force and get rid of these barbs with no limitation afterwards.
Place the slotted screwdriver and push the cover to release!
The cover was fixed on these points
Remove the screw, which is holding the f... PCB
Press the holder together to remove it.
Remove the coverage from PCB
Take the PENCIL...
...and rub the black nipple!
Reason: graphite (black lead) is increasing the conductibility
Use a thin stick to easy attach the coverage again.
assembly the rest of the phone in reverse order.
Now enjoy your perfectly working handset!
