Minelab F3 Service Manual page 69

After switching on the
F3 makes no sound
from speaker
Threshold tone
intermittent (including
LEDs for F3L)
Threshold Tone is too
loud
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
makes a loud noise
Ground Balance does
not work

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

is
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

check the coil plug is firmly secured to the
electronics pack

inspect coil cable for damage – if no damage
replace electronics pack

if damaged replace with new coil

check endcap is secure

replace electronics pack

conduct Audio Reset

replace coil

replace electronics pack

replace wiring loom

replace speaker pod

replace wiring loom

replace coil

replace electronics pack
Page 69
F3 Service Manual