Navico MX420, Installation & Service Manual

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MX 420 Installation and Service Manual
Procedure:
1. Install the download program dlmx400.exe, dos4gw and the *.hex file in the same
directory (i.e. MX Marine).
2. Using a pre-made Power/Download cable, connect the power cable to the power
supply. Black wire to ground and blue wire to +12-24V.
3. Connect the DB9 connector to COMM1 (RS232) serial port of the PC.
4. Connect the 18-pin connector (or Cable A) to the MX420/MK12.
5. Turn the MX420/MK12 on to verify if power connection is correct. Turn it off
again.
6. The download program runs much faster under DOS than under Windows.
However, if a DOS-PC is not available, you can also use the DOS prompt
under Windows 95, 98, NT, etc.
7. At the command prompt type dlmx400 *.hex. (where *.hex is the program file
name)
8. The program will ask you to turn the navigator on. When this has been done
the file will be loaded into the download program and after a short while a
short line starts to turn in the right hand side of the computer screen.
9. The traffic lights will turn from red to yellow and then to green.
10. When the download is finished the computer will return to the DOS prompt.
Turn the main power supply switch OFF and ON and verify the program
version in the AUX 7 display. Under the AUX7 screen, press the left-most
softkey 3 times to show the complete program build number (i.e. V1.5(751).
Hint:
It is highly recommended that the MX420 navigator be cold started after
downloading the program. Please note that all settings including waypoints and
routes will be lost.
This is important to flush out the residual memory, which may cause problems
with the operation of the unit.
Memory Clear Procedure :
1. After downloading the software, turn the power off to the MX420 by turning
off the 12 VDC circuit breaker (this may also be accomplished by removing
the “Cable A” from the back of the unit).
2. Press and hold down the right-most softkey.
3. Apply 12-volt power to the unit and wait for about 5 seconds. The MX420
will come on and display the MX Marine logo.
4. Release the softkey.
5. The memory is now cleared.