7940/7960 Off-hook switch repair - what ist the best way to fix this

[torleif]

There is a problem with the off-hook switch on 7940/7960 phones. After some time the switch does not work. When you pick up the handset nothing happens.

What is the best way to fix this?

1: Clean the switch circuit board with alcohol?

2: Replace the switch circuit board?

3: Replace the rubber part of the switch?

Is it possible to replace the switch with another kind of switch?

Any other suggestions?

Any help would be appriciated.

[Wilson Samuel]

Hi,

The best would be to clean the phone with Propyl-Alcohol (a normally used cleaner) and second would be to buy new phone (if you are using them for labs, then I shall highly recommend buy from eBay, most of the vendors @ eBay give great value for the money)

HTH

[support]

Hi Torleif,

I unfortunately have a lot of experience with this, since a lot of my phones are old and I teach my administrators how to fix them. 

The off-hook switch is an easy fix, follow these steps:

1. Remove the 4 rear screws (2 are located under the rubber stands).

2. Open up the phone (It is pressure clamped so you need to apply a bit of force.

3. Locate the metal "spring" or "wire" that controls the switch. It has most likely come out of his socket. Place it back in, test the off-hook switch movement before reassembling.

Let me know how that works.

Thanks,

FG