Minelab F3 Service Manual download pdf (Page 40)

F3 Field Service Manual

Page 40

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. The following table identifies a number of faults and

provides recommended solutions. The suggested solutions should be investigated in the

order they are listed.

Problem Recommended Solutions

F3 will not switch on ● check batteries are installed correctly

● replace batteries with fresh batteries

● remove and refit battery pack

● replace battery pack

● replace wiring loom

● replace electronics pack

F3 will not switch off ● 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

After switching on

the F3 makes no

sound from speaker

● 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

Threshold tone is

intermittent

(including LEDs for

F3L)

● replace wiring loom

Threshold Tone is

too loud

● 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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Minelab F3 Service Manual Page 40

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