17
ENGLISH
TROUBLESHOOTING
- After the startup, the FAULT LED is steady lit, nothing else happens.
Wait at least 1 minute, then check:
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Configuration, monitoring on, etc.
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Digital addresses.
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The local bus cable.
- After the startup, the FAULT LED is steady lit and the ON LED is blinking,
nothing else happens.
-
Has software reset been done after loading the configuration?
-
Pilot tone levels in each input should be around 4 V RMS (or in the 170-200 range
read in the PC software).
-
If you find difficult to get the pilot tone to the right level, sensitivity can be
adjusted (normally, not needed) by the R33 trimmer, which is located on the MT
7308 printed circuit board.
- Every now and then a loudspeaker line fault is reported, but everything
seems to be working well.
Check the level during paging or playing, as it could be too high and cause amplifier
clipping. Distortion includes a lot of high frequency harmonics and this could cause
interferences to the measuring results. To avoid this problem, insert low-pass filters
as described in ‘DSP OUTPUT SETTINGS’.
Summary of Contents for MT 7308
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