Analog Touch Tone Dials (the older type that use a transistor and two inductor coils) can  be repaired in many cases. If the ferrite coils on the circuit board have not been physically damaged, or the button mechanism is not damaged, there is a good chance that your old pad can be brought back to life.

Service procedures to Touch Tone Dials consist of:

• Testing for proper mechanical operation of the switch mechanisms.
• Cleaning of the switch contacts on the sides and on the rear of the pad.
• Testing for proper operation of the Oscillator (Seven distinct tones must register properly on a special Test Set).
• Re-adjustment of the high- and low-band Oscillator coils to bring the output in line with factory specifications.
• Testing for proper operation of the Receiver Shunt (lessens the pad output to the Receiver during operation).
• Testing for proper operation of the Transmitter Disconnect (takes the transmitter out of the circuit during operation of the pad).

Older Touch Tone telephones are very rugged and will give many years of reliable service. Some are now collectible, especially those with only ten buttons (no # or * keys). We can repair your older Touch Tone telephone or just the Touch Tone Dial.
 

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