Minelab F1A4 Manuale di Servizio Scaricare il pdf (Pagina 10)

F1A4 Field Service Manual – Level 1 and Level 2 Maintenance

Page 10

2.2.4 Coil Connector Test

Loop the coil cable and hold against side of the control box, approximately

250mm from the coil connector. Grasp the coil cable 75mm from the coil connector

and gently turn 30 degrees side to side, listening for a change of threshold. If there

is a noticeable threshold change (ie similar in volume to test piece threshold

change), the Coil should be replaced (Section 3.4) or the F1A4 should be sent to an

accredited F1A4 Level 2 maintenance workshop for repair.

2.2.5 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 the faulty Control Box should be replaced or

the F1A4 should be sent to an accredited F1A4 Level 2 maintenance workshop for

repair.

2.2.6 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

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 the faulty Control

Box should be replaced or the F1A4 should be sent to an accredited F1A4 Level 2

maintenance workshop for repair.

2.2.7 Earset Test

1. Connect the Earset to the Control Box and ensure that the threshold tone is

audible at the earphone.

2. If a volume control is fitted, ensure that it operates correctly.

3. If the Earset does not operate correctly it should be replaced or the F1A4

should be sent to an accredited F1A4 Level 2 maintenance workshop for

repair.

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Minelab F1A4 Manuale di Servizio Pagina 10