21
Troubleshooting
s e c t i o n 9
TR O U B L E S H O O T I N G
Problem
Probable cause(s)
Remedy
One or more of the
fixtures is completely
dead.
No power to fixture.
Check that power is switched on and
cables are plugged in.
Primary fuse blown.
Replace fuse.
Secondary fuse(s) blown (located
on PCB inside base).
Check fuses on PCB and replace.
Fixtures reset correctly
but all respond
erratically or not at all to
the controller.
The controller is not connected.
Connect controller.
XLR pin-out of the controller does
not match pin-out of the first fixture
on the link (i.e. signal is reversed).
Install a phase-reversing cable between
the controller and the first fixture on the
link.
Fixtures reset correctly
but some respond
erratically or not at all to
the controller.
Bad data link connection
Inspect connections and cables. Correct
poor connections. Repair or replace dam-
aged cables.
Data link not terminated with
120Ω
termination plug.
Insert termination plug in output jack of
the last fixture on the link.
Incorrect addressing of the fix-
tures.
Check address and protocol settings.
One of the fixtures is defective and
disturbs data transmission on the
link.
Bypass one fixture at a time until normal
operation is regained: unplug both con-
nectors and connect them directly
together. Have the defective fixture ser-
viced by a qualified technician.
XLR pin-out on fixtures does not
match (pins 2 and 3 reversed).
Install a phase-reversing cable between
the fixtures or swap pins 2 and 3 in the fix-
ture that behaves erratically.
An effect fails to reset
correctly.
The effect requires mechanical
adjustment.
Contact Martin technician for service.
No light and “LERR”
error message
displayed.
The ballast and transformer set-
tings do not match local AC volt-
age and frequency.
Disconnect fixture. Check ballast and
transformer settings and correct if neces-
sary.
Lamp missing or blown
Disconnect fixture and replace lamp.
Lamp cuts out
intermittently.
Fixture is too hot.
Allow fixture to cool.
Reduce ambient room temperature.
Recalibrate temperature sensors.
The ballast and transformer set-
tings do not match local AC volt-
age and frequency.
Check ballast and transformer settings
and correct if necessary.
Table 7: Troubleshooting
Summary of Contents for MAC 300
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