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MX 420 Installation and Service Manual
Memory Backup Battery
The internal real time clock and memory which stores the waypoints, alarm limits, etc.,
is backed up by a lithium cell battery. The expected life time is 2 years at 21° C, but this
is based on the temperature the navigator is stored at when not in use. The higher the
temperature, the shorter the life and vice versa.
Backup Battery Replacement
Marine electronics dealers or radio supply stores will typically stock the replacement
battery, Type CR2032, 3V Lithium battery.
The battery is mounted in a socket located on the MX420 processor board. MX Marine
recommends this service to be done by a qualified service technician.
MX420 PC Interface
The diagram below shows the RS-232 interface between the MX420 (NMEA2 port
only) and a PC serial port.
GRN/WHT
SHIELD (BLK)
GREEN
GRAY
13 - NMEA2 IN (B)
1 - GND
12 - NMEA2 IN (A)
17 - NMEA2 TXD
(RS-232)
Mx420
CABLE (A)
PC CONN.
DB9S
(Female)
Terminal Strip
RED
BLACK
+12 VDC
NEG.
2 - PWR IN (+)
3 - PWR RET (-)
PC Interface Cable Diagram
Software Download Procedure
Tools, cables and software needed:
·
Power/Download cable (or refer
PC Interface Cable Diagram
above)
·
DC power supply 12-24 VDC
·
PC with DOS or DOS prompt under Windows xx
·
Download program
dlmx400.exe
and
Dos4gw.exe
·
*.hex file – the program itself
Summary of Contents for MX420
Page 1: ...Installation Service Manual MX420 Navigation System ...
Page 5: ......
Page 8: ...1 MX 420 Installation and Service Manual List of Components SECTION 1 LIST OF COMPONENTS ...
Page 9: ...MX 420 Installation and Service Manual List of Components 2 ...
Page 15: ...MX 420 Installation and Service Manual List of Components 8 ...
Page 17: ...MX420 Installation and Service Manual Technical Specifications 10 ...
Page 24: ...17 MX420 Installation and Service Manual SECTION 3 MECHANICALAND INSTALLATION DRAWINGS ...
Page 25: ...18 MX420 Installation and Service Manual ...
Page 32: ...25 MX420 Installation and Service Manual SECTION 4 ELECTRICALINSTALLATION DRAWINGS ...
Page 33: ...26 MX420 Installation and Service Manual ...
Page 49: ...42 MX420 Installation and Service Manual ...
Page 57: ...50 MX 420 Installation and Service Manual SECTION 5 INSTALLATION NOTES ...