802VLZ4
22
802VLZ4
Appendix A: Service Information
Repair
For warranty service, please 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 an 802VLZ4 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.
Balanced XLR Input Connector
The 802VLZ4 mixer has three 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)
Balanced XLR Output Connector
The male XLR connectors provide a balanced line-
level signal that represents the end of the mixer, where
the fully mixed stereo signal enters the real world.
Connect these to the left and right line-level inputs
of powered speakers or to the left and right line-level
inputs of an amplifier (with speakers already attached).
2
3
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
2
1
Balanced XLR Input Connector
Appendix B: Connections
If you think your 802VLZ4 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 gain set correctly?
• Is the level knob turned up?
• Is the instrument switch set correctly?
(Channels 1–2 only).
• Try the same source signal in another channel,
set up exactly like the suspect channel.
• Check that the pan knob is set correctly.
• Check the EQ and the low-cut switch.
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 a left speaker is presumed dead, switch the
left and right cords, at the mixer's main outs.
If the left speaker is still not working, 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
• Check that the supplied power supply is
connected to a live AC outlet. The power LED
on the mixer should come on when the power
switch is on.
