MartinLogan MAC 500/E - Manual (Page 32)

32 MAC 500/E User Manual
T r 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 (located at the mains
inlet cable).
Disconnect fixture and replace fuse.
Secondary fuse(s) blown (located on
PCB inside base). Disconnect fixture. 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 damaged
cables.
Data link not terminated with
120Ω
termi-
nation plug.
Insert termination plug in output jack of the
last fixture on the link.
Incorrect addressing of the fixtures. Check fixture address and protocol settings.
One of the fixtures is defective and dis-
turbs data transmission on the link.
Bypass one fixture at a time until normal oper-
ation is regained: unplug the XLR in and out
connectors and connect them directly
together. Have the fixture serviced by a quali-
fied 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 fixture that
behaves erratically.
Magnetically indexed effect
resets correctly but wanders
after fixture reaches operat-
ing temperature.
Effect wheel or magnetic sensor requires
mechanical adjustment. Disable effects feedback (page 13). Contact
Martin technician for service.
Mechanical effect loses
position.
The transformer setting does not match
local voltage. Disconnect fixture. Check transformer setting
and correct if necessary.
Mechanical train requires cleaning,
adjustment, or lubrication.
Contact Martin technician for service.
Lamp fails to strike after
turning the fixture off and on
again, or after a power fail-
ure. (MAC 500 E)
Electronic ballast does not recognize
that the lamp is off.
Send LAMP OFF command before sending
another LAMP ON command. The lamp will
strike after an 8 minute delay. See protocol for
override if dLOF is set to OFF
No light and “LERR” error
message displayed.
The ballast and transformer settings do
not match local AC voltage and fre-
quency.
Disconnect fixture. Check ballast and trans-
former settings and correct if necessary.
Lamp blown Disconnect fixture and replace lamp.
Lamp not installed Disconnect fixture and install lamp.
Lamp cuts out intermittently.
Fixture is too hot.
Allow fixture to cool.
Reduce ambient room temperature.
Recalibrate temperature sensors.
The ballast and transformer settings do
not match local AC voltage and fre-
quency.
Disconnect fixture. Check ballast and trans-
former settings and correct if necessary.