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KX-UDT111RU (serv.man3) - Panasonic PBX Service Manual (repair manual). Page 11

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11
KX-UDT111RU
4.2.9.
LED Circuit
• DPU(IC100) controls each LEDs.
4.2.10. Vib Circuit
• Vibrator is controlled by IC1-10 pin.
Type of LED
LED ON
LED OFF
Bell LED (Green)
LED531
IC100-128pin = High
(Q525 = ON)
IC100-128pin = Low
(Q525 = OFF)
Bell LED (RED)
LED530
IC100-97pin = High
(Q520 = OFF)
IC100-97pin = Low
(Q520 = ON)
Key back-light LEDs (Yellow green)
LED520 - LED529
IC100-16pin = High
(Q521 = ON)
IC100-16pin = Low
(Q521 = OFF)
VIB ON
VIB OFF
IC1-10 pin (Q540)
 High
(ON)
Low
(OFF)
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