Appendix 5 Troubleshooting - EDAN SD3 Series User Manual

SD3 Series Ultrasonic Pocket Doppler User Manual

Appendix 5 Troubleshooting

Phenomenon
The speaker does not sound.
The speaker sounds weak.
Low sensitivity.
The screen displays nothing
and the speaker does not
sound after the main unit is
switched on.
The speaker sounds but the
screen displays nothing or
displays wrong characters
after the main unit is
switched on.
Loud noise.
The screen displays nothing
Possible Cause
The speaker is muted.
Bad connection between the
probe and main unit.
Main board defective.
Speaker defective.
Probe defective.
The volume is too low.
No coupling gel is applied.
The battery is in low energy.
The probe is not placed at
the optimum position.
No coupling gel is applied.
Main board defective.
The battery is in low energy.
Main board defective.
The device is subject to
strong electromagnetic
emissions.
Speaker defective.
Probe defective.
Main board defective.
The probe has not been
taken out from the probe
holder when the main unit is
switched on.
The battery is in low energy.
Too much coupling gel on
the probe acoustic surface.
Power adapter defective.
- 53 -
Troubleshooting
Solution
Turn up the volume.
Make sure that the probe is well
connected to the main unit.
Replace the main board.
Replace the speaker.
Replace the probe.
Turn up the volume.
Apply coupling gel on the probe
acoustic surface.
Replace the battery or charge the
rechargeable battery.
Locate the probe at a position
for optimal FHR examining.
Apply coupling gel on the probe
acoustic surface.
Replace the main board.
Replace the battery or charge the
rechargeable battery.
Replace the main board.
Make sure that the environment
in which the device is operated
is not subject to any source of
strong electromagnetic
emissions.
Replace the speaker.
Replace the probe.
Replace the main board.
Take out the probe from the
probe holder before switching
on the main unit.
Replace the battery or charge the
rechargeable battery.
Wipe the residual coupling gel
off the probe after each use.
Replace the power adapter.