Read Panasonic KX-DT543RU / KX-DT546RU Service Manual online
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KX-DT543RU/KX-DT543RU-B/KX-DT546RU/KX-DT546RU-B
4.2.9.
LED Circuit
The lighting of the LEDs is controlled by IC150.
Ringer LEDs are static lighting system.
Other LEDs light up in a dynamic lighting system.
The duty ratio is 1/10 (ON time 1.28ms).
Ringer LEDs are static lighting system.
Other LEDs light up in a dynamic lighting system.
The duty ratio is 1/10 (ON time 1.28ms).
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