KX-DT543RU, KX-DT546RU - Panasonic Telephone Service Manual (repair manual). Page 15

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15
KX-DT543RU/KX-DT543RU-B/KX-DT546RU/KX-DT546RU-B
LED dynamic control timing chart
LED lights with 3.3V created by the STB pin of the High output and Transistor Collector pin of the Low output. 
4.2.10.
EHS Circuit
EHS is controlled by IC150. 
The audio signals are exchanged with IC300 through HANDSET JACK(JK501). 
12.6ms
LED_STB2
Q110C
Q111C
Q112C
Q113C
Q117C
CO3(Red)
lighting
CO5(Red)
lighting
CO10(Red)
lighting
CO11(Red)
lighting
CO14(Red)
lighting
1.28ms
0.1ms



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