Mackie 1642-VLZ4 Owners Manual - Page 13

Owner's Manual 16. Mono Level If Mr. Mono's main mono mix is maxed, just reach for this knob and turn it down a bit. Just the thing for sending mono signals to mic inputs like camcorders, telephone interface boxes, even answering machines. With the pot all the way up (fully clockwise), you'll have 6 dB of extra gain, and unity gain is at the 12 o'clock position. 17. Voltage Selector 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. WARNING: Before you plug the AC power cord into the 1642VLZ4, you must make sure that this slide switch is set to the same voltage as the local AC mains supply. Only slide the voltage switch with the power cord unplugged. Use a flat headed screwdriver to slide the switch if needed. The switch allows you to use the mixer in different countries and voltages, meet interesting people from other cultures, and entertain them. 18. Power Connection Just in case you lose the cord provided with the 1642VLZ4, its power jack accepts a standard 3­ -prong IEC cord like those found on most professional recorders, musical instruments, and computers. WARNING: Before you plug the AC power cord into the 1642VLZ4, you must make sure that the voltage selector [17] slide switch is set to the same voltage as the local AC mains supply. WARNING: Disconnecting the plug's ground pin can be dangerous. Don't do it. 19. Fuse The 1642VLZ4 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 1642VLZ4 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. 21. Power LED You've probably already figured this out, but if the 24 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. 23 21 22. Phantom Switch This switch controls the phantom power supply for all the mic inputs, as discussed on page 8. 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 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 the phantom switch on. You'll notice that when you turn the phantom power off, the LED stays on for a while. This is a natural phenomenon - 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). Owner's Manual 13