Fault Finding Procedures; Introduction; Trouble Shooting Table - Minelab F3 Service Manual

4.

Fault Finding Procedures

4.1 Introduction. A functional test failure (Section 2.2) can generally be repaired by
replacing one or all of the following line replaceable units:
● Coil
● Wiring Loom
● Electronics Pack
a. The F3 is designed so that line replaceable units can be exchanged between
detectors without the need to calibrate. This means that where spare parts are not available
and more than one detector is faulty, then parts from one detector can be used to make
another serviceable. For example, if detector # 1 has an unserviceable coil and detector # 2
has an unserviceable electronics pack, then the coil from detector # 2 can replace the coil on
detector # 1 thereby producing a serviceable detector.
b. Whenever a line replaceable unit is exchanged, follow the applicable procedure
described in Section 3.
c. Where the source of a fault is unknown, due to the ease of replacement it is
recommended that line replaceable units be exchanged in the following sequence:
● Electronics Pack
● Coil
● Wiring Loom
4.2

Trouble Shooting Table.

provides recommended solutions. The suggested solutions should be investigated in the
order they are listed.
Problem
F3 will not switch on
F3 will not switch off
After switching on
the F3 makes no
sound from speaker
Threshold tone is
intermittent
(including LEDs for
F3L)
Threshold Tone is
too loud
F3 Field Service Manual
The following table identifies a number of faults and
Recommended Solutions
● check batteries are installed correctly
● replace batteries with fresh batteries
● remove and refit battery pack
● replace battery pack
● replace wiring loom
● replace electronics pack
● remove battery pack and refit
● check magnet on ON/OFF slide has not been dislodged and
connected to the wiring loom overmould
● replace wiring loom
● replace electronics pack
● check for tone using the earset
● if there is tone through earset - replace speaker pod
● if there is no tone through earset - replace wiring loom
● if there is no tone through earset - replace electronics pack
● replace wiring loom
● ensure area is free from local electromagnetic interference
● conduct Audio Reset
● conduct Noise Cancel
● replace coil
● replace electronics pack
● replace wiring loom
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