Fuse; Power Switch; Power Led; Phantom Switch - Mackie 1604vlz Owner's Manual

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19. Fuse

The 1604VLZ4 is fused for your (and its own)
protection. If you suspect a blown fuse, disconnect
the power cord, pop out the fuse drawer with a small
flat screwdriver, and replace the fuse with a 1A SLO
BLO, 5x20mm, available at electronics stores or
your dealer (or a 500 mA SLO BLO 5x20 mm if
your 1604VLZ4 is set to 220V-240V).
If two fuses blow in a row, something is very wrong.
Please call our toll-free number 1-800-898-3211 from
within the U.S. (or call the distributor in your country)
and find out what to do.

20. Power Switch

Press the top of this rocker switch inwards to turn
on the mixer. The power led [21] on the top surface
of the mixer will glow with happiness, or at least it
will if you have the mixer plugged in to a suitable
live AC mains supply.
Press the bottom of this switch to put the mixer into
standby mode. It will not function, but the circuits are
still live. To remove AC power, either turn off the AC
mains supply, or unplug the power cord from the mixer
and the AC mains supply.
As a general guide, you should turn the mixer on
first, before the power amplifier or powered speakers,
and turn it off last. This will reduce the possibilities
of any turn-on, or turn-off thumps in the speakers.

21. Power LED

You've probably already figured this out, but if the
power [20] switch is on, this LED (light-emitting
diode), located in the output section, will light. If the
switch is off, well, you get the idea. If the power switch
is on and the LED does not glow, one of three things
has happened: Somebody tripped over the power cord
and yanked it from the outlet, your electricity has been
turned off due to nonpayment, or the fuse has blown.
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1604VLZ4
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22. Phantom Switch

This switch controls the phantom power supply
for all the mic [1] inputs, as discussed on page 9.
When turned on (or off), the phantom power circuitry
takes a few moments for voltage to ramp up (or down).
This is perfectly normal. Make sure that you pull down
the master fader, and headphone/control room volume
before engaging the phantom switch.
23. 48V LED
Located right next to the power LED, this is just to let
you know which way you have the phantom [22] switch
set. If your dynamic mics work and your condensers
don't, chances are this LED is off, so turn it on.
You'll notice that when you turn the phantom power
off, the LED stays on for a while. This is a natural phe-
nomenon — the LED is actually a voltmeter telling you
that the phantom power takes time to ramp itself down
to zero volts. So, if you've turned phantom power off to
connect something to the mic inputs, wait until the LED
stops glowing and then make your connections safely.

24. BNC Lamp Socket

Located in the top right corner of the output
section, this 12V socket will drive any standard
BNC-type lamp (a Littlite® #12G or #12G-HI
(high-intensity), for instance).
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