Led Circuit - Panasonic KX-T7633 Service Manual

10.3. LED CIRCUIT

The lighting of the LED is controlled by pin 19 to 28(Row) and pin 11 to 16(Colum) of IC5.
The LED lights up in a dynamic lighting system.
The duty ratio is 1/8(ON time 1.5ms).
Only D107 of LED for CO7 lights up in a static lighting system.
- IC5-pin 55 H : CO7 Green ON
- IC5-pin 55 L : CO7 Green OFF
- IC5-pin 56 H : CO7 Red ON
- IC5-pin 56 L : CO7 Red OFF
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