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F3 Service Manual

Page 19

 Turn on the detector with the black endcap attached.

 Conduct the test piece test and note the number of LEDs that light up as well

as the tone and volume of the audio.

 Increase the volume to maximum by pressing the button five times listening

for the longer beep on the fifth press (indicating maximum Volume/Sensitivity).

 Recheck the detector with the test piece, confirming an increased number of

LEDs light up and the tone is louder.

 Decrease the sensitivity to normal by pressing the Θ button five times listening

for the double beep on the fifth press. This indicates the detector sensitivity

has returned to its default setting.

 Decrease the detector sensitivity to minimum by pressing the Θ button five

times listening for the longer beep on the fifth press (Indicating lowest

Volume/Sensitivity).

 Check the detector with the test piece and confirm there is no audio or LED

indication to the test piece with detector set to its minimum sensitivity.

 If the correct LED/volume responses are not achieved, refer to 5 Fault Finding

Procedures.

NOTE

Regardless of minimum sensitivity, at least one LED will remain illuminated provided

an Earset speaker off is not connected to the detector.

 Switch the F3 off and on – this will revert the detector to default sensitivity.

Move the detector coil over a large metal target checking that the LEDs light up

in the correct sequence.

 Check that the LEDs can be extinguished by pressing and holding Θ button

then quickly pressing and releasing the green ground balance button.

 Once extinguished, check the LEDs can be illuminated by pressing and holding

the button and quickly pressing and releasing the green ground balance

button.

 If any fault is detected refer to section 5 Fault Finding Procedures.

Minelab F3 Service Manual

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