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

_______________________________________________________________________________________________________________________
4

Fault Finding Procedures

4.1 Introduction

a. A functional test failure can generally be repaired by replacing one of the line replaceable
units.
b. The F3 COMPACT 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.

4.2 Trouble Shooting Table

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
Constant steady tone from
detector
On switch on, the "Coil
Fault" tone occurs - "low
pitched double tone every
five seconds"
On switch on, the
"Equipment Fault" tone
occurs – "low pitched slow
oscillating tone (ee-aww,
ee-aww)
After working in hot
conditions, detector
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
● Ensure area is free from local electromagnetic interference
● Conduct Audio Reset
● Conduct Noise Cancel
● Check coil plug is tight
● Replace coil
● Replace main PCB
● Check the coil plug is firmly secured
● Inspect coil cable for damage – if no damage replace main PCB
● If damaged replace with new coil
● Turn off then on
● Replace the switches
● Replace main PCB
● Conduct Audio Reset
● Check coil plug is tight
69
F3 COMPACT Service Manual