Question about Panasonic KX-T7735 Corded Phone

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I have a KX-T7735 phone in my home with 2 additional cordless for this unit. All of a sudden I heard maybe a slight click from the main unit, then there was no dial tone nor display info on the screen. Now the screen is constantly blinking then going dark very quickly. Because my husband is partially paralyzed this phone works for him to use the intercom, and open the garage doors from the units. Can this be fixed without sending away for repair?

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  • Panasonic Master
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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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