DX 73V
Find the small circuit board that the channel selector is mounted to.  Plug in the plug that is disconnected from this board.  Clip the Orange jumper wire on the rear corner of the microprocessor board.  Find the two wires that are cut near the small board.(Gray and Yellow)  Reconnect the wires back together. (Gray to Gray, Yellow to Yellow)
This will enable your dual watch function.
VR1  RX meter
VR4  Squelch
VR5  FM deviation
VR8  TX meter
VR12  Low power AM modulation
VR13  High power
VR14  High power AM modulation
VR16  Low power
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