Question about AT&T 2256 Cordless Phone
I went to base and smelt some heat, than we took the batteries out of both the att2256's and replugged them, but the led display still says searching with no dial tone..the problem of course is with the phone. I want to know how to really actaully manually fix the inside of the base or phones...i assume its the base. if you know how to tell me that would be so great.. thank you so much.
Relay contacts could be shorted, but if there are no relays on the board and the switch on the cradle is not shorted, then there is a transistor somewhere responsible for taking line off-hook. Usually it is in series after the diode bridge used to power the phone ckt's. This phone likely has a hold switch on it as well, the hold ckt's can fail as well, causing phone to remain off-hook. Again usually a shorted transistor. Only way to know is to start replacing. Your likely going to need a schematic to find out which one, unless your willing to remove them one at a time, and test them out. It's usually an PNP type also, but not always... Some are common signal transistors, so don't be afraid to sub with common types, but in most cases correct repair only with same types. Also be sure to check the diodes, and look for any burnt components. Good luck
Posted on May 29, 2006
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Posted on Jan 02, 2017
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