Mackie PPM1012 owner manual Appendix a Service Information, Troubleshooting, Repair

PPM1012

If you think your powered mixer has a problem, please check out the following troubleshooting tips and do your best to confirm the problem. Visit the Support section of our website (www.mackie.com) where you will find lots of useful information such as FAQs, documentation and user forums. You may find the answer to the problem without having to send your mixer away.

Troubleshooting

Bad Channel

•Is the channel EQ set up nicely?

•Is the channel gain set correctly?

•Is the channel fader up enough?

•Is the channel OL led on?

•Is the channel pan set in the middle?

•Is there too much compression on channels 1-6?

•Are the hi-z instrument switches set OK for guitars connected to channels 7 and 8?

•Try unplugging any insert devices from the insert jacks on channels 1 to 8.

•Try the same source signal in another channel, set up exactly like the suspect channel.

•Is phantom power required for your micro- phones?

Bad Output

•Is the main fader turned up?

•Check the power amp mode switch is set cor- rectly.

•Are the graphic EQs set to reasonable levels?

•Is the FX level going to the main mix, too high?

•If it’s one of the main speaker-level outputs, try unplugging its companion. For example, if it’s the 1/4" left main output, unplug the left Speakon output. If the problem goes away, it’s not the powered mixer.

•If a left speaker is presumed dead, connect it to the right output instead. If the problem stays with the same speaker, check the speaker wir- ing, or any speaker fuses.

•Unplug anything from the main line-level out- puts, main inserts, or other line-level outputs, such as mono out, mon 1 send, mon 2 send, FX1 and FX2 send, just in case one of your external pieces has a problem.

•If the power amp limiter lights come on often, you may be overdriving the amplifiers. Check the loudspeaker average load impedance is not less than 4 ohms. Check the speaker wiring.

Noise

•Turn the channel gains down, one by one. If the sound disappears, it’s either that channel or whatever is plugged into it, so unplug whatever that is. If the noise disappears, it’s from your whatever.

Power

•The power LED should come on if the powered mixer is connected to a suitable live AC mains outlet, and the power switch is on. Check the power cord is securely plugged in.

Levitation

•The heavy combined weight of all the loud- speaker electrons is balanced by the fans and warm air that make things lighter. During louder moments when all the electrons are sent rushing out to your loudspeakers, you may find that the powered mixer will rise in the air and hover up and down in sync with the music. This is perfectly normal.

Repair

For warranty repair or replacement, refer to the war- ranty information on page 35.

Non-warranty repair for Mackie products is available at a factory-authorized service center. To locate your nearest service center, visit www.mackie.com, click “Support” and select “Locate a Service Center.” Service for Mackie products living outside the United States can be obtained through local dealers or distributors.

If you do not have access to our website, you can call our Tech Support department at 1-800-898-3211, Mon- day-Friday, 7 am to 5 pm Pacific Time, to explain the problem. Tech Support will tell you where the nearest factory-authorized service center is located in your area.

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PPM1012