by 5B4AIY » 07 Mar 2016 06:32
Good Morning, Frank,
The first thing is to check that your TRX-2 is actually executing the flash writer code. With nothing connected to the RS-232 port, from the power OFF state, press and hold the VFO button. Whilst holding the button, briefly press the PWR button to turn the transceiver on. You should immediately see the LCD light up and display the message:
JUMA TRX-2 Flash
Writer started ..
Release the VFO button, and after 5 seconds the transceiver should drop into its normal boot mode and power up.
If you do not see this message then it means that the flash writer code is corrupted or missing. Unfortunately, the only way to correct that is to re-program the microprocessor using the programming interface connector on the DDS/Controller board, using a Pickit-3 or similar loader. You cannot reload the code using the serial port, you have to proceed as if the microprocessor's memory is blank.
Even if you do have to re-program the microprocessor, the procedure is quite straightforward, and I have written a guide explaining how to do this, but it does mean you will have borrow or purchase a Pickit-3 programmer.
However, please verify your flash writer as described above before doing anything else.
73, Adrian, 5B4AIY