Minelab F3 Bedienungsanleitung

SERVICE MANUAL

Version 4: Febrary 2010

Part No: 4904-0004

F3 Metal Mine Detector

F3 Field Service Manual

Page 2

WARNING

THIS DOCUMENT CONTAINS MINELAB ELECTRONICS

LIMITED RIGHTS TECHNICAL DATA OR RESTRICTED

RIGHTS DATA OR BOTH.

Minelab Electronics

This work is copyright. Apart from any use as

permitted under the Copyright Act 1968, no part

may be reproduced by any process without written

permission from

Minelab Electronics

118 Hayward Avenue, Torrensville

South Australia.5031

CONTENTS

Section Page

1. Introduction 4

2. Mechanical & Functional Testing 5

2.1 Mechanical Testing 6

2.2 Functional Testing 6

3. Disassembly & Reassembly Procedures 13

3.1 Introduction 13

3.2 F3 Tool Kit 13

3.3 Electronics Pack 13

3.4Coil 16

3.5 Speaker Pod 21

3.6 Handle 24

3.7 Wiring Loom 26

3.8 Armrest 30

3.9Shafts 32

3.10BatteryPack 38

4. Fault Finding Procedures 40

4.1 Introduction 40

4.2 Trouble Shooting Table 40

F3 Field Service Manual

Page 4

1. Introduction

a. Servicing the F3 Series of detectors comprises fault finding, repair and maintenance

and is designed to be simple and fast thereby reducing the amount of time a detector is

unusable. Repair and maintenance is based on line replaceable units which can be fitted to

a detector without the need for adjustment or calibration. Additionally, serviceable line

replaceable units can be exchanged between detectors as required.

b. Servicing the F3 can be conducted within the field (under clean and dry conditions) or

at local depots. No special tools are required, but it is recommended that the F3 Service

Tool Kit be used.

c. Servicing the F3 is restricted to the exchange of line replaceable units following the

identification of a faulty sub-assembly. Servicing DOES NOT include any repairs to printed

circuit boards as this is only conducted at a Minelab facility.

d. This manual should be read in conjunction with the F3 Operations Manual.

Additionally, from time to time, Minelab will issue Technical Service Notes which serve to

supplement the information contained in this manual.

e. Any questions regarding this manual or any repair procedure can be directed to

Minelab via the following internet link: http://minelab.com/

F3 Field Service Manual

Page 5

2. Mechanical & Functional Testing

Figure 1: F3 Packed in its Hard Case

a. Whenever a detector is returned for servicing, mechanical and functional tests must

be completed to confirm and/or identify the fault. Figure 1 illustrates the complete detector

when packed in its hard case. A visual inspection should be conducted to ensure all parts

are present and any missing items noted and replaced as necessary.

b. To assist in identifying a faulty component, it is useful to have serviceable line

replaceable units on hand. Subsequently, by exchanging a suspect component with a

serviceable assembly, the fault can be confirmed and the faulty line replaceable unit

identified.

NOTE

At the completion of any servicing procedure, ALL functional tests must be completed to

confirm the detector is working correctly and no faults remain.

F3 Field Service Manual

Page 6

2.1 Mechanical Testing. Confirm that all components are present in the hard case and

unpack, fully extend and insert batteries into the F3 as described in the F3 Operations

Manual. Figure 2 identifies the major components of the F3. During mechanical testing

check the:

●detector for any obvious signs of damage

●sensitivity endcap is correctly positioned and in good condition

●battery pack lid O-ring is present, clean and in good condition

●tether attaching the battery pack lid to the battery pack is present and in good

condition

●coil can be tilted smoothly, rotates and holds its position without drooping

●skid plate is firmly attached and in good condition

●shafts extend smoothly to their full extension and that the camlocks hold the coil and

shafts in position

●earset dustcaps (on detector earset socket and earset) are in good condition

●armrest camlock and ensure the armrest slides smoothly

●armstrap is in good condition

●shafts can be collapsed smoothly and without any snagging

Figure 2: F3 Major Components & Handle Controls

a. To replace any worn or damaged parts found during mechanical testing refer to

Section 4.

2.2 Functional Testing. Functional testing is used to confirm the serviceability of an F3

before it is returned to the field for use and whenever doubt exists about the serviceability of

an F3. The F3 must pass all tests to be considered serviceable and ready for use in

operations. Whenever a line replaceable unit is replaced, all functional testing must be

completed.

a. Functional testing requires a ground balance test piece. The ground balance test piece

simulates mineralised ground which results in an alarm from the F3. A mineralised “hot”

rock or adequate amounts of local mineralised soil is suitable. Alternatively, a floor tile may

be suitable for use as a ground balance test piece.

NOTE

Do not use any metal object as a ground balance test piece.

F3 Field Service Manual

Page 7

b Switch ON Test. The Switch ON Test checks that power is correctly supplied to the

electronics pack and internal diagnostics discover no system fault. The test is conducted as

follows:

●Extend the lower shaft at least 150mm (6ins).

●Hold the coil at least 600mm (24ins) from the ground and away from any metallic

objects and switch on.

●Ensure that four rising tones occur over approximately 12 seconds. A steady

threshold tone should be heard a few seconds after the rising tones finish.

NOTE

On occasion, it is possible that more than four rising tones occur. This does not represent

a fault provided the rising tones finish and a steady threshold tone is produced.

Figure 3: Switch ON Test

●If the correct tones are not heard, check that good batteries are being used and that

the batteries are fitted correctly.

●If the correct tones are still not heard refer to Section 4 for faultfinding procedures.

c. Noise Cancel Test. The test ensures the F3 successfully completes the noise

cancel procedure required whenever local electrical interference is present. During the test,

the Noise Cancel button, wiring loom and electronics pack are checked for correct operation.

The test is conducted as follows:

●Hold the coil stationary and at least 600mm (24ins) above the ground and away from

any large metal objects during the test.

●Press and immediately release the Noise Cancel button. (Figure 4)

Figure 4: Noise Cancel

NOTE

The coil should not be moved nor should metallic objects be brought near the coil during this

procedure.

●If functioning correctly, Noise Cancel will commence with two single beeps followed

by 45 seconds of sharp double beeps and finishing with four single beeps.

F3 Field Service Manual

Page 8

●During the 45 seconds, the detector scans the environment searching for the source

of any electrical interference. Once detected, the F3 will automatically select a

different operating frequency to eliminate or reduce the interference.

●If the correct sequence of Noise Cancel beeps is not heard, refer to Section 4 for

faultfinding procedures.

d. Audio Reset Test. This test confirms the audio reset button (also the ground

balance button), wiring loom and electronics pack are functioning correctly. The objective is

to ensure the Threshold Tone returns to its correct volume if altered from its steady state.

The test is conducted as follows:

●Hold the coil at least 600mm (24ins) off the ground and away from any metallic

objects.

●Induce a Threshold Tone rise in volume by collapsing the lower shaft into the middle

shaft. Alternatively, slowly move the coil toward a metal object and once the

Threshold Tone increases in volume, hold the detector stationary.

●Once the Threshold Tone has increased in volume, press and immediately release

the green ground balance button. (Figure 5)

NOTE

If the ground balance button is not immediately released, the F3 will commence the Ground

Balance procedure.

Figure 5: Audio Reset

●Within two seconds the Threshold Tone should return to its correct level.

●If the threshold tone does not return to the correct level, refer to Section 4 for

faultfinding procedures.

e. Ground Balance Test. This test confirms the detector is capable of ground

balancing against mineralised ground. In doing so, it confirms the correct operation of the

ground balance button, wiring loom and coil. The test is conducted as follows:

●Ensure hands and arms are free of metallic objects (watches, rings etc), and that no

other metallic objects are near the coil.

●Keeping the detector stationary, press and hold the ground balance button for five

seconds then release the button.

NOTE

This action will cause the F3 to delete the previously stored ground balance condition.

Unless this is done, the detector will remember its last ground balance condition regardless

of the unit being switched off or the batteries removed.

F3 Field Service Manual

Page 9

●Slowly move the ground balance test piece from approximately 150mm (6ins) above

the centre of the coil towards the centre of the coil and confirm that a rise in

Threshold Tone occurs. This confirms that the F3 is detecting the mineralised

content of the ground balance test piece.

●Press down and hold the ground balance button whilst slowly moving the ground

balance test piece from approximately 150mm (6ins) above the centre of the coil

towards the centre of the coil (and touching the coil). Then move the ground balance

test piece away from the centre of the coil to a distance of 150mm (6ins).

●Repeat this process until the ‘Ground Balance OK’ tone consisting of a short high-

pitched double beep occurs. This tone confirms the ground balance procedure has

been completed correctly.

●Release the ground balance button and confirm that a steady, low volume Threshold

Tone remains.

●Confirm the ground balance is correct by moving the ground balance test piece from

approximately 150mm (6ins) above the centre of the coil towards the centre of the

coil. If there is no alarm from the ground balance test piece, the ground balance

procedure is functional.

●If an alarm occurs, repeat the above procedure. If ground balance cannot be

achieved, refer to Section 4 for faultfinding procedures.

NOTE

Where the Ground Balance Test is conducted using local soil, Figure 6 illustrates the

procedure to be followed

Figure 6: Ground Balance

NOTE

Successful ground balancing occurs within 5 to 10 seconds. Where the ground balance test

piece or local ground conditions are not sufficiently mineralised, the ‘Ground Balance OK’

tones may take a longer time to occur.

f. Earset Test. This test test confirms the earset is operating correctly and is

conducted as follows:

●Plug the earset into the detector as shown in Figure 7.

F3 Field Service Manual

Page 10

Figure 7: Connecting the Earset

●Switch the F3 on and confirm the Threshold Tone is audible.

●If an earset ‘speaker on’ (4523-0027) is being tested, check that tones can also be

heard from the detector loudspeaker.

●If an earset ‘speaker off’ (4523-0025), identified by green band on earset cable near

the plug is being tested, check that no tones can be heard from the detector

loudspeaker.

NOTE

If the detector being serviced is an F3L configuration (contains LEDs on handle assembly),

the LEDs should illuminate when using an earset ‘speaker on’ and extinguish when using an

earset ‘speaker off’.

●If a fault is discovered, refer to Section 4 for faultfinding procedures.

g. Alarm Tone Test. This test will produce an alarm when either the red endcap or

yellow endcap is dislodged. This is a safety feature designed to ensure the detector

operates at the correct level of sensitivity. To conduct the test:

●With a red or yellow endcap fitted and the detector switched on, remove the endcap

and confirm that a continuous cycling alarm tone is produced.

●If an alarm tone does not occur refer to Section 4 for faultfinding procedures.

NOTE

The red and yellow endcaps are detected by the electronics pack due to magnets located

within the endcaps. The black endcap has no magnets and represents the default sensitivity

of the F3. This means the black endcap, if dislodged, will not cause an alarm because the

detector is already operating at the default sensitivity.

h. F3L - LED and Volume Control Test. For the F3L configuration, LED and volume

control is tested as follows:

●Turn on the detector with the black endcap fitted.

●Conduct the test piece test and note the number of LEDs that light up and 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.

●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 Θbutton five times listening for the

double beep on the fifth press. This indicates the detector sensitivity has returned to

its default setting.

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