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1202VLZ4
1202VLZ4
Appendix A: Service Information
If you think your 1202VLZ4 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.720trees.com) where
you will find lots of useful information such as FAQs
and other documentation. You may find the answer
to the problem without having to send your mixer away.
Troubleshooting
Bad Channel
• Is the mute/alt 3–4 switch in the correct
position?
• Is the level knob turned up?
• Try unplugging any insert devices (channels
1–4 only).
• Try the same source signal in another channel,
set up exactly like the suspect channel.
Bad Output
• Is the associated level knob (if any) turned up?
• If it’s one of the main outs, try unplugging all
the others. For example, if it’s the 1⁄4" left main
out, unplug the RCA and XLR Left outputs. If
the problem goes away, its not the mixer.
• If it’s a stereo pair, try switching them around.
For example, if a left output is presumed dead,
switch the left and right cords, at the mixer
end. If the problem switches sides, it’s not the
mixer.
Noise
• Turn the channel level and aux return knobs
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
• Unplug the power cord and check the fuse.
Repair
For warranty service, refer to the warranty
information on page 27.
Non-warranty service is available at a factory-
authorized service center. To locate the nearest
service center, visit www.720trees.com, click “Contact
Tech Support” and select “Locate a Service Center
or Distributor” [3]. Service for a 1202VLZ4 living
outside the United States may 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,
Monday-Friday, during normal business hours, Pacific
Time, to explain the problem. Tech Support will tell
you where the nearest factory-authorized service
center is located in your area.
Appendix B: Connections
Balanced XLR Input Connector
The 1202VLZ4 mixer has four female XLR
inputs. Be sure the cables are wired per AES
(Audio Engineering Society) standards:
Balanced XLR Input Connector
Pin 1 – Shield (Ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
2
3
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
2
1
Balanced XLR Input Connector
