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Matrix3 Repair Procedures
Overview 19
Replacement of Power Fuse 19
Removal and Installation of Modules 20
Physical repair of the Matrix3 system is limited to replacement of expansion modules.
Overview
Skills Required
• Removal of LX-300 from audio system.
• Removal and installation of expansion modules.
• Return of LX-300 to system, including cable re-connection.
Required Tools and Components
• Anti-static equipment, including a personal grounding strap.
• #2 Phillips screwdriver.
• Cable labels and pen.
Replacement of Power Fuse
The LX-300 is protected from over-voltage conditions by a 2.5A, 240V slow-blow, 5◊20mm fuse. This fuse is located
in a fuse drawer beneath the power plug socket. The power plug must be removed to access the fuse.
1. Power off the LX-300. Remove power cable.
2. Open the fuse drawer, located immediately below the power plug socket.
The fuse drawer has two compartments: a spare fuse compartment, located at the front of the drawer; and the
working fuse compartment, located at the rear of the drawer.
3. Remove the failed fuse and replace it with the spare fuse.
Caution
If there is no spare fuse the LX-300 has experienced a fuse failure previously. Contact LCS Series technical support
for further instruction: the unit may be performing abnormally and may require advanced technical servicing.
4. Close the fuse drawer and plug in the power cable.
5. Power on the LX-300, and observe the System LED and Frame Status displays. A detailed description of the
boot process is provided in the LX-300 Start Up Routine (p. 7).
6. Within four seconds of power-on, the System LED must display and remain solid green (except after the first
all-indicators-on test, when it will momentarily flicker red). Wait for the LX-300 to finish booting.
The system has successfully booted with the Frame Status shows an animated "-OK-" message and the Status LED
displays solid green.
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