User's Manual

27
12 FULLY DISABLING A PRECISION 406
In the unlikely event that your Precision 406 refuses to turn off then it may have a fault.
Procedures for dealing with a faulty Precision 406 are covered in section 7 on false
alarms; in simple terms you should do the following:
• De-activate the EPIRB as described in section 7.2
• Suppress its signal by removing the antenna and wrapping the Precision
406 in metal foil, as described in section 7.3
• Leave for 3 days until the battery is used up.
We do not recommend any other course of action.
However, if it is absolutely
necessary to fully disable an Precision 406 (by unplugging its battery), proceed as
follows. This is a dangerous task and should only be performed by a qualified
technician.
WARNING:
Risk of electric shock.
Proceed at your own risk, no liability accepted
• Take the Precision 406 below decks into the dry.
• Locate a flat bladed screwdriver with a long reach.
• Unscrew and retain the front 4 sealing screws.
• Pull the lanyard out and remove the 2 hidden rear screws.
• Do
not
as yet remove the sea contact screws.
• Lift the lens dome off. Remove and retain the grey gasket.
•
Avoid touching the circuit board and the glass strobe tube.
• Hold the hexagon shaped pillars and remove the sea screws.
• Use a cross-headed screwdriver to remove the front screw.
• Grip the white plastic coil former and lift the circuit board up 3cm (1”).
• Using fingers, unplug the white 4-way battery connector.
• The flashing will now cease.
• Collect all the parts and return them to your nearest service agent.
Strobe
Front screw
Gasket
Hidden
screws
Sea
screws
Battery
connector
DANGER - HIGH VOLTAGE
sealing
screws
Front
pillar
Hex
Pull up on
coil former
Lens dome
Circuit
board
270V DC