Removing And Installing Led Lenses; Fuse Replacement - Martin Professional Stagebar 54 User Manual

Removing and installing LED lenses

The LED lenses are constructed in sheets of 9 lenses. The lenses concentrate the LED output into a 25°
half-peak beam angle. Lenses must be removed to obtain smooth color using the diffuser front.
To remove a lens sheet:
1. Isolate the fixture from power. If the fixture has been in use, allow it to cool for at least 10 minutes.
2. If a diffuser front is fitted, remove it (see "Installing and removing the diffuser front" on page 19).
3. See Figure 6. Lens sheets are retained by magnetic mountings. Press on one side of the lens sheet until
you can grip the other side. Lift the lens sheet off the magnets and store for possible future use.
To install a lens sheet:
1. Isolate the fixture from power. If the fixture has been in use, allow it to cool for at least 10 minutes.
2. Place the lens sheet into position so that it is held securely in its magnetic mounting.
Earlier models had lens sheets with retaining screws. If replacing screw-type lens sheets with magnetic
sheets, you must also replace the lens sheet mounting posts.

Fuse replacement

Warning! Disconnect from power before opening covers. Replace fuses with ones of the same type
and rating only.
Primary fuse
Stagebar 54 fixtures are protected by a 4 amp slow-blow primary fuse located in a fuseholder on the rear
panel (see Figure 1 on page 6). If a fixture is completely dead (apart from the battery-powered functions
available in the control panel and display), the primary fuse may have blown.
To replace the primary fuse:
1. Disconnect the fixture from power and allow to cool for 10 minutes.
2. Using a flat-head screwdriver, turn the fuseholder cap counter-clockwise to release it, then remove the
fuse.
3. Replace a defective fuse with one of the same type and rating only. Replacement primary fuses are
available from Martin suppliers (P/N 05020016).
4. Reinstall the fuseholder before reapplying power.
Power output fuse
The power output circuit and connector are protected by a 15 amp slow-blow fuse located inside the fixture
on the mains filter PCB. If devices connected to a Stagebar 54 via the power output connector are dead but
the Stagebar 54 is working normally, this fuse may have blown.
To replace the power output fuse:
1. Disconnect the fixture from power and allow to cool for 10 minutes.
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Figure 6: Lens removal
Stagebar 54 user manual