Question about Panasonic KX-T7735 Corded Phone
I am sorry but I think that this fault seems beyond your limit but for a trial you can take a test.
In the front end of the unit where the telphone line comes in check the line detect sections , the opto couplers and the switching transistors , see for visible damage, check if the line voltage is high or is short with a low resulting in a dial tone loss.
Now check the sections of the adapter, the input voltage to the phone, has the voltage regulator shorted, if so check to see if the transistor, zener combination can be changed.
If the above two sections do not have any result then I am afraid there is damage to the processor of the base phone,you will have to get estimate from panasonic to proceed only if the cost is reasonable.
Posted on Sep 30, 2010
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Posted on Jan 02, 2017
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