MD69BRX
20
12 MAINTENANCE & FAULT FINDING
12.1 Maintenance
No scheduled maintenance is required. It is recommended to gently wipe away any accumulated
dust periodically with a soft lint free cloth.
Note: The MD69BR is a sealed unit and has no user-serviceable parts inside. Breaking
the factory seal will invalidate the warranty.
12.2 Fault-Finding
12.2.1 MD69BR does not operate
It is probable that there is a loss of power. Check the dc power supply and data connection to the
unit.
12.2.2 MD69BR aligns to zero degrees but does not follow the source heading
The NMEA 0183 digital signal to the repeater is either not present, or the data sentence being
sent is not of the correct structure. Check the heading source data for the presence of a valid
heading data sentence; refer to section
for details of indication in the
case of no data.
12.2.3 Display Illumination not functioning
If remotely controlled, an incorrect control signal may be being received, check wiring and signals.
The internal LED illumination devices may be damaged or there may be damage to the PCB or
rotary dimmer switch. Return the unit to Marine Data for servicing. It should be noted that the
display illumination may not be noticeable under bright ambient light conditions. Illumination is
controlled independently by the integral rotary dimmer control and the Remote Dimmer input, if
fitted, whichever input is adjusted will take precedence.
12.2.4 Dial oscil/- 35 degrees
Check NMEA data connection and validity. Refer to section
for details
of indication in the case of no data.
