GE Invenia ABUS 2.0 Technical Publication page 229

Noise Received via
the External
Cables
Intermittent noise
Self generated
noise (noise
generated inside
the unit)
Heat problems
Invenia ABUS 2.0 – System Setup and Basic Service Manual
4700-0043-00 Rev. 4
Troubleshooting and System Messages
Move the Scan Head Assembly to another location and
verify any changes.
Electromagnetic Interference (EMI) from radio frequencies,
magnetic fields, and transients in the wiring. The noise can enter
the system via the mains power cable, transducer cable(s) or
any other external connected cable(s).
To troubleshoot this type of noise, disconnect cables that are not
needed for the basic use of the Scan Head Assembly. Check for
any change in the noise each time a cable has been
disconnected from the Invenia ABUS 2.0.
• Network cable
Verify if the noise change or disappear when the cables are
removed.
Often, this type of noise is due to grounding problems in the
mains power system or that the Invenia ABUS 2.0 is sharing a
power line with other equipment.
• Is there any equipment that is turned on and off near the
Invenia ABUS 2.0 ?
• Is the noise present all around the clock or only at special
occasions?
• Self generated noise may be due to either:
• heat problems
• hardware problems
• software problems
Heat problems are usually starting when Invenia ABUS 2.0 has
been ON for some time.
If Invenia ABUS 2.0 has been used for scanning for some time
before the noise appears, it may be due to either heat problems
or some software related issues. By doing a restart you may
learn some more about the cause.
Restart the system.
• If the noise is present after the restart, the cause is most
likely due to heat problems.
• If the noise is gone after the restart, it may be due to either
the setup/adjustments of the or a software failure.
Some possible causes for heat problems:
• Fan filters need to be cleaned or replaced.
• Room temperatures outside the allowed temperature limits.
• Fans are worn-out.
• Hardware problems.
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