F3Ci Service Manual
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9
f. Earset Test. This test confirms the earset is operating correctly and is conducted as
follows:
• Plug the earset into the detector as shown in Figure 6.
• Switch on the detector and confirm the audio tones are audible using the earset.
• If an earset speaker On (4523-0027) is being tested check that the tones can also be
heard from the detector loudspeaker.
• If an earset speaker Off (4523-0025), identified by green band on the earset cable
near the plug, is being tested check that tones can only be heard in the earset and
not the detector loudspeaker.
g. L
ED Test. This test confirms the visual indicator (lights) can be enabled and operate
correctly. To conduct the test:
• Turn on the detector.
• Pass the coil over a metal object and check no LEDs are turned on, by default the
L
EDs are off.
• Turn on the LEDs, press and Hold the Yellow mode select button and then press and
Release the ground balance button, check that a single LED is turned on when no
metal objects are near the coil.
• Pass the coil over a metal object and check that an increasing number of LEDs
illuminate as the detection tone increases.
• The LEDs are toggled on and off by pressing and Holding the yellow mode select
button and then pressing and Releasing the ground balance button.
h. Vibration Test. This test confirms that the vibration feature can be enabled and
vibrates the detector when there is a detection tone. The test is conducted as follows:
• Turn on the detector.
• Pass the coil over a metal target and confirm that no vibrations are felt, by default
t
he vibration feature is off.
Figure 6: Connecting the Earset
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