Fault Finding Procedures; Introduction; Trouble Shooting Table - Minelab F3Ci Service Manual

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4 Fault Findin Procedures

Introduction

4.1
a. A functional test failure can generally be repaired by replacing one or more of the line
replaceable units.
b. The F3Ci 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 battery compartment, then the coil from detector # 2 can replace the coil on
detector # 1 thereby producing a serviceable detector.
rouble S ootin
4.2
a. 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
Detector will not switch
on
Detector will not switch
off
After switching on the
detector makes no
sound from speaker
Ground Balance does
not work
Noise Cancel does not
work
(no Noise Cancel tones
emitted)
LEDs do not illuminate
Cannot hear the Test
Piece
Start Up tones keep
repeating
able
Recommended Solutions
check batteries are installed correctly
replace batteries with fresh batteries
replace battery compartment
replace main PCB
remove batteries
replace Main PCB
check for tone using the earset, turn LEDs on
if there is tone through earset – replace the speaker
if there is no tone through earset – replace main PCB
replace handle
replace coil
replace main PCB
Note: Noise Cancel may not completely remove the effects of
interference if the source is powerful or in close proximity
repeat Noise Cancel
replace handle
replace main PCB
remove earset
Turn on the LEDs
replace handle
replace main PCB
fit and use an earset
set sensitivity switch to default 4
conduct Noise Cancel
ensure coil plug is firmly connected
replace main PCB
replace coil
insert new batteries
replace battery compartment
replace main PCB
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F3Ci Service Manual