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3.4 Control Panel PCB
The control panel PCB and the main PCB communicate with each other by serially transmitting
commands and data.
The control panel unit consists of a gate array, an LCD and LEDs, which are controlled by the gate
array according to commands issued from the FAX engine on the main PCB.
The panel FPC is a flexible keyboard PCB which integrates the key matrix having rubber keytops.
Control Panel PCB and its Related Circuit