KX-NT366RU (serv.man2) — Panasonic PBX Service Manual (repair manual). Page 11

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11
KX-NT366RU/KX-NT366RU-B
4.2.7.
Sub-CPU (IC4, IC5)
IC4 controls KEY, LED, and LCD. IC5 controls Self-labeling.
A reset signal from the VoIP(IC1) starts either reset or normal operating.(L:RESET)
The SUB-CPU and VoIP are connected by a serial communication.
IC4 checks the presence of IC5 by getting the signal from IC5.
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