17
5 Troubleshooting
This section of the manual describes the steps you should take when you believe the Datawell
RX-D2 is operating improperly. The results of these simple investigative procedures may help
you avoid the down-time and inconvenience of repair service. It is assumed that the installation
worked before the trouble started, in other words: installation has been done in a correct way
according to
chapter 3
.
The troubleshooting instructions are divided into three categories:
Power and fuses.
Antenna, signal strength and noise.
Data interface.
If none of the steps described in those section solves your problem, contact Datawell Service
Department listed at the end of this manual.
5.1 Power and fuses
Typical faults in this area are characterized by one simple symptom:
does nothing.
Display is not lit, no audio is heard via the internal speaker when pushing the “speaker” button,
no audio is available via the line out connector. No data is transmitted towards the PC.
If none of these signals are available, mains power is probably not OK, please check the
following:
Check mains or backup cabling.
Check if mains or backup voltages are OK.
Check both fuses. Replace fuses if necessary and always both at the same time, even if one
of them seems OK
1
. The fuses are accessible from the backside of the RX-D2, see
chapter 2
.
5.2 Antenna, signal quality and noise
Faults in this area will typically give a working system, but with bad data, intermitted reception
and/or lots of noise. Check antenna cabling for short or opens. Coaxial cables may also be
damaged by sharp bends or twists. Look for mechanical damage or contamination of the
antenna. Looking at the display and listening to the signal via the built-in speaker gives an
indication of the signal quality.
As described earlier the receiver has both a display and a pushbutton controlled loudspeaker to
give you indications what may be the cause of bad reception. Look at the display and see if the
signal quality indicator gives a response.
Now look at the first line of the display. An occasional ''bad vector'' message is normal and no
reason for concern. The same goes for an occasional ''checking sync'' messages between normal
''heave'' indications. Only continuous flipping between ''synchronizing'' and ''checking sync''
1
The transient that knocked out the first fuse will have probably damaged the other one as well and its
reliability will be compromised.
Summary of Contents for 45100
Page 2: ...2 Check if mains supply matches with the specifications of the device...
Page 4: ...4...
Page 6: ...6...
Page 8: ...8...
Page 12: ...12...
Page 20: ...20...
Page 36: ...36 E 2 Directional Antenna 25 45 MHz Figure E3 Directional quarter wave antenna...