Section 5 Maintenance and Service
WARNING
To avoid personal injury, do not open system –
there are no internal user-serviceable parts.
1. Check all cables and connections.
2. Check troubleshooting chart (Table 5-1) and
take any suggested corrective action.
Table 5-1
Troubleshooting Chart
Symptom Corrective Action
Ensure AC adapter
connected to system
and proper power
source.
Ensure power switch is
in the ON position.
LCD screen does not
illuminate when
system powered on.
Ensure the contrast
control is properly
adjusted.
Unable to freeze A-
scans in the automatic
capture modes (300A
and 300AP only).
Verify that the
appropriate capture
mode has been
selected (i.e. cataract,
dense cataract, etc.).
No refractive data is
shown in the IOL table
(300A and 300AP
only).
Verify that all
necessary IOL data
have been entered (i.e.
k readings, formula
constants).
Inconsistent axial
length measures
obtained (300A and
300AP only).
Check anterior
chamber depth
measures – if
inconsistent, may
reflect corneal
compression occurring
during measurements.
Orbital pattern beyond
the retina does not
gradually decline
(300A and 300AP
only).
Ensure the probe is
aligned along the
visual axis.
Symptom Corrective Action
Have patient blink a
few times in order to
lubricate cornea to
better facilitate
ultrasound
transmission.
Pachymeter reading
cannot be obtained
(300P and 300AP
only).
Ensure probe is held
still during
measurement
(acceptance angle of
±10°).
Paper does not
advance in printer.
Reload paper in
printer.
5.4
TR
BLE
H
TIN
!
3. If problem cannot be solved, please contact
Sonomed service department for further
help. Prior to contacting Sonomed, please
gather as much information as possible
concerning the specific problem, and have
the system and probes nearby. This will
greatly aid the service representative in
determining the cause of the problem.
If it is deemed necessary to return the system
and/or probes to Sonomed for service, a
return authorization will be issued. Please
ensure that any materials returned to
Sonomed are adequately packaged to avoid
any damage during shipment.
ELECTROMAGNETIC INTERFERENCE
At times during normal use, the operator may
experience periods of interruption caused by
interference from outside sources such as
electrostatic discharge, power generators or
other office equipment.
Should any outside interference cause the
system to “lock-up” or begin to operate in a
manner inconsistent with the manufacturers
instructions, simply turning the unit off for a few
seconds will usually resolve the problem.
In some cases a “hard-reset” must be performed
by the operator. This will cause all stored data
to be replaced with the factory default settings,
and should therefore only be used when
absolutely necessary. For instructions on
Doc # 0300-A-1901-3D 5 - 5
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