Minelab F1A4 Manual de servicio Pagina 19

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F1A4 Field Service Manual – Level 1 and Level 2 Maintenance
Page 19
4.5 NOISE CANCEL TEST
Momentarily press the NOISE CANCEL button.
The F1A4 should immediately “beep”
After 70 seconds the F1A4 should “beep” four times:
BEEP BEEP BEEP BEEP
If the correct tones are not heard, go to Section 5.1.4
4.6 AUDIO RESET TEST
Momentarily press the
AUDIO RESET
button.
The F1A4 should immediately BEEP.
After 3 seconds the F1A4 should give five “high / low” beeps:
BEEP
BEEP
BEEP
BEEP
BEEP
The threshold tone level should now be set at the correct operating level (ie
just audible). If the correct tones or threshold level are not heard, go to Section
5.1.5
4.7 EARSET TEST
Connect the Earset to the Control Box and ensure that the threshold tone is
audible at the earphone. If a volume control is fitted, ensure that it operates
correctly. If the Earset does not operate correctly, go to Section 5.1.6.
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