10.6. DATA COMMUNICATION
Function
The data communication circuit serves the following functions:
Information exchanger between PBX and proprietary telephone, key input information as well as
data for the LED control, LCD control, voice data, etc. This information is continuously
exchanged at all times.
Circuit Operation
The data received from PBX is inputted to the comparator(pin 68) built in IC5 through Pulse Trans
T1. The threshold voltage of the comparator is determined by R62 to 64 and inputted to pin 67
and 29.
The data to PBX is outputted from pin 70 and 71 of IC5, drives T1 by Transistor Q2 and
transmitted.
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Summary of Contents for KX-T7630
Page 4: ...4 ...
Page 8: ...8 1 NO OPERATION Note Refer to 1 5 of WAVEFORM for waveform 8 2 LCD DOES NOT OPERATION 8 ...
Page 9: ...Note Refer to 6 of WAVEFORM for waveform 8 3 HANDSET DOES NOT WORK Receive Send 9 ...
Page 10: ...Note Refer to 7 8 of WAVEFORM for waveform 8 4 HEADSET DOES NOT WORK Receive Send Note 10 ...
Page 27: ...13 CABINET AND ELECTRICAL PARTS LOCATION 27 ...
