Preventive Maintenance and Fault-finding
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder
Page 5-11
ST.TM.E10033.3
Step
Action
If Result of Action is Yes…
If Result of Action is No…
5
Check Receiver and Cables. Are the
problems only exhibited on the monitoring
Receiver output and not on the transmitted
signal?
Possible problem with the Receiver or
associated cables. Check the rear panel
cables connecting the Receiver by
swapping them for ones of known quality/
performance. Call a Service Engineer.
Proceed to next step.
6
Check Video Encoder Circuits. Picture
distortion may indicate a possible problem
with the MPEG-2 video encoder circuits. Is
the picture distorted?
Try a different coding mode and see which
areas of the picture are distorting. Call a
Service Engineer.
If the fault persists, call a Service
Engineer.
5.4.8
Audio Channel Problems
In the event of audio channel problems, if audio has been lost altogether
or performance is degraded, use Table 5.3 to fault-find the MCE. If the
video channel is also affected, troubleshoot as detailed in Section 5.4.7,
Video Channel Problems. In the event of persistent problems call a Service
Engineer or contact Customer Services.
Table 5.3: Audio 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?
Troubleshoot 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 Audio Input and Cables. Check
the audio source is functioning correctly by
connecting it directly to local monitoring
equipment. Is the audio signal present/
clean?
Check the audio level bargraphs on the
Status/Audio (Channel n) Menu
to confirm that the audio signal is being
received. Check the input cables by
swapping them with ones of known
quality/performance, to see whether it is a
cable problem.
Check the audio 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 audio source.
3
Check Configuration. Is the configuration
valid? 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.
4
Check Receiver and Cables. Are the
problems only exhibited on the monitoring
Receiver output and not on the transmitted
signal?
Possible problem with the Receiver or
associated cables. Check the rear panel
cables connecting the Receiver by
swapping them for ones of known quality/
performance. If the fault persists, call a
Service Engineer.
If the fault persists, call a Service
Engineer.
5.4.9
Data Channel Problems
In the event of data channel problems, if data has been lost altogether or
performance is degraded, use Table 5.4 to troubleshoot the MCE. If the
video channel is also affected, fault-find as detailed in Section 5.4.7, Video
Channel Problems. In the event of persistent problems call a Service
Engineer or contact Customer Service.
NOTE...
Data inputs are not compressed by the MCE.