Minelab GPX-4000 User Manual

80 81Troubleshooting
No sound
• Check that the detector is on (battery, power
cable, connections and LCD)
• Turn the Threshold control fully clockwise
• Turn the Volume Limit to maximum (40)
• Check that the headphones are plugged in
• Try using a different set of headphones or a
different battery
Threshold but
no target signal
• Try testing different coils with a known target
Random noise
• Ground Balance again
• Retune using the Auto Tune button
• Set the Coil/Rx switch to Cancel
• Reduce Gain
• Move away from other detectors working nearby
• Move away from thunderstorm build-up
Battery will not charge
• Check that there is power to the accessories
socket using vehicle charger
• Check the fuse in the 12V charger plug (M205-5A)
• Check the battery LED patterns (pg. 20)
Battery not holding charge
• Try an alternative charger adaptor
• Change the battery
'Coil Overcurrent' screen
appears
• Turn the detector off, wait for a few seconds
before turning it back on again
User Preferences
Main Menu: Range: User Preferences:
Volume Limit 1 to 40
Audio Tone 1 to 100
Signal Peak 1 to 20
Track Speed Slow
Medium
Fast
GB Type General
Specific
Sensitive Extra
Smooth
Iron Reject Off (All Metal)
1 to 30
Battery Volts - -
Manual Tune 0 to 255 -
Mode Edit: General: Patch: Deep:
Audio Quiet
Normal
Boost
Deep
Gain 1 to 15
Motion Very Slow
Slow
Medium
Fast
Response Normal,
Inverted

Minelab GPX-4000 Specifications

General

Brand	Minelab
Model	GPX-4000
Category	Metal Detector
Language	English