Wiring to the main board inside the top cover. The board inside must be removed to get at the solder points on block S13 and S14.
S13 Pin1 is the RAW AF Out from the RX detector
S13 Pin8 is the input for flat TX audio
S13 Pin11 is OV/GND
S14 Pin6 is PTT
S14 Pin3 is COS
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