Led Circuit - Panasonic KX-T7665NE Service Manual

Digital proprietary telephone
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10.3. LED CIRCUIT

The lighting of the LED is controlled by pin 14 to 18 (Row) and pin 8 to 13 (Colum) of IC2.
The LED lights up in a dynamic lighting system.
The duty ratio is 1/8 (ON time 1.5ms).
15

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