Simrad MX512 - Troubleshooting Guide

110 | Installation
Troubleshooting Guide
The MX51x is virtually maintenance free. There are, however, a few important points to
note.
Please check your installation carefully before returning the MX510 to the dealer or
factory for service. A few troubleshooting tips follow.
The MX51x performs a variety of self tests during normal operation. If a function fails
the self test, the navigator will display an Internal Error message every one minute.
Problem Diagnosis
No response: (Black LCD dis-
playandnotrafclight)
No external power supply -
Check supply voltage
-
Check for reverse polarity
-
Check wire installation
-
Check if external fuse is blown
-
No keyboard response or par-
tial keyboard response
Corrupted memory
-
Faulty keyboard
-
Faulty processor
-
Return the unit for repair
-
Battery low alarm External battery low
-
Check power supply voltage and installation
-
No position update; won’t
tracksatellites(Redtrafc
light blinking for more than 10
minutes)
Jamming by other on-board or adjacent transmitters -
Faulty antenna or antenna cable
-
Relocate GPS antenna
-
Connect the MX421 power directly to the external 12 VDC
-
supply
Replace antenna
-
Return the unit for repair
-
No position update; tracking
satellites(Redtrafclightsolid
all the time)
DGPS mode set to - DGPS Only and no corrections are being
received
GPS satellite signals weak (Satellites dropping in and out)
-
Check maximum cable length restrictions and cable conditions
-
(for weak satellite signal condition)
Return the unit for repair
-
All data lost at power up Backup battery is dead
-
Replace the internal backup battery
-
No DGPS update; not tracking
beacon station
DGPS mode set to
- Off, so no corrections are being received
Station Select
- is set to Manual
Faulty antenna
-
No data output to peripheral
equipment
NMEAoutputdatanotcongured -
Wrong NMEA version
-
Wrong output rate or format
-
Wrong electrical standard
-
Toomanydatasentencesturnedon(throughputoverow) -
More than one MNEA
- talker on the circuit
Faulty port
-
The MX420 requires the user to enable NMEA
-
Return the unit for repair
-