Preventive Maintenance and Fault-finding
Page 5-10
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder
ST.TM.E10033.3
1.
Check that you are using the relevant
Setup Menu
. Changes cannot be
made to the parameters shown in the
Status Menus
.
2.
Check that the keys are functioning. Perform a self-test using the
Keyboard
option on
the Diagnostics/Front Panel Menu
.
Commands are not Carried Out
If changes to parameters entered at the front panel menus are seemingly
not carried out, check that the changes to the parameter settings and
values are accepted by the equipment. The Enter softkey must be pressed
after a parameter has been adjusted in order to implement the changes
which have been selected.
5.4.7
Video Channel Problems
In the event of video channel problems, if video has been lost altogether
or performance is degraded, use Table 5.2 to troubleshoot the MCE. In the
event of persistent problems call a Service Engineer or Customer Services.
Table 5.2: Video Channel Fault-finding
Step
Action
If Result of Action is Yes…
If Result of Action is No…
1
Check for Error/Alarm Indications. Is an
error message displayed?
Fault-find according to the displayed
message (see Annex C). Try to identify the
source of the problem and the knock-on
effects.
Proceed to next step.
2
Check Video Input and Cables. Check
the video source is functioning correctly by
connecting it directly to local monitoring
equipment. Is the video signal present/
clean?
Check the
Status/Video/Source
Menu
to confirm that the video signal is
properly synchronised. Check the input
cables by swapping them with ones of
known quality/performance, to see whether
it is a cable problem. A freeze frame or
black output is indicative of video loss at
the input.
Check the video cables by swapping
them with ones of known quality/
performance, to see whether it is a
cable problem. If the cables are fine,
fault-find the video source.
3
Check Configuration. Is the configuration
valid? Is there sufficient output power, error
correction, FEC? Is the correct input type
set? Output scrambled? Are the
parameters which have been selected,
workable? (see Getting Started in Chapter
3, Operating the Equipment Locally)
Proceed to next step.
If in doubt about the configuration, load
a configuration which has previously
proven successful, and try again. Try
temporarily turning off any audio/data
services and reconfigure the equipment
using the auto-calculation and selection
mode. This will give better bit-rate and
resolution to the video channel.
4
Check Video Input Circuits. Insert a video
signal of known quality/performance or use
the
Setup/Video/Source Menu
to
insert a test pattern or choose a different
video source. Is the problem fixed?
Possible problem with the video input
circuits. Call a Service Engineer.
Proceed to next step.
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