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1604VLZ4
1604VLZ4
Appendix A: Service Information
Warranty Service
If you think your 1604VLZ4 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
• Are the channels assigned to the correct mix
(1-2, 3-4, L-R )?
• Is the fader up?
• Try unplugging any insert devices from the
insert jacks.
• Try the same source signal in another channel,
set up exactly like the suspect channel.
Bad Output
• Is the level control (if any) turned up?
• If you’re listening to the CR outs or phones
outputs, has a source selection been made?
• If it’s one of the main outs, try unplugging its
companion. For example, if it’s the 1/4" left
main out, unplug the RCA output. If the
problem goes away, it’s 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 stays on the left, it’s not the
mixer.
• Unplug everthing from the main inserts.
Noise
• Turn the channel faders and stereo 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 35.
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 1604VLZ4 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, 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 1604VLZ4 mixer has 16 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
