protech MX404 User manual

PROTECH ®
WWW.PROTECHAUDIO.COM
1/05
Protech Audio Corporation PO Box 597 192 Cedar River Road Indian Lake New York 12842 Voice 518-648-6410 Fax [phone]
All Quicktrack products use a consistent ground scheme. The MXT-1 power supply provides the
necessary ground conductor. Power supplies without the 3rd conductor ground should not be used
with Quicktrack products.
CAUTION: Do not plug power supply into AC receptacle until the secondary conductors have been
attached to the Quicktrack module. Doing so may cause the power supply conductors to short and
damage the supply.
Installion steps for the Quicktrack modules are as follows;
1- Remove the cover screw (All modules except MX410) and cover.
2- Press down on the lower edge of the Quicktrack mounting extrusion until the lower edge of the
printed circuit assembly comes free.
3- Slip the printed circuit assembly out of the upper edge of the mounting extrusion.
4- Mount the Quicktrack mounting extrusion in an appropriate location away from moisture heat
sources and AC fields.
5- Connect all audio connections to the barrier connector using double conductor shielded cables
designed for low level audio signals. Do not use multiple solid conductor cables.
6- Connect the 3 power supply conductors to the power supply connection points on the barrier
connector.
7- Plug the power supply into an AC receptacled.
8- Check for proper illumination of the LED power indicator.
9- Adjust all audio levels as necessary.
10- Mount the cover onto the Quicktrack module being careful not to over-tighten the mounting
screw.
All initial adjustments on the MX404 are made at the factory. If after installing the unit higher or lower output
levels are desired adjust outputs using trimpots as indicated.
INSTALLATION & OPERATION
MANUAL
MX404 AUDIO LINE MIXER, Rev. A
The Model MX404 has four balanced line inputs mixed to
a common line output. Each input has adjustable gain and
a 6dB pad. The pad is activated by placing the RED push-on
shunt on the appropriate connector. The MX404 is shipped
with all four pads in place.
All inputs and the output are electronically balanced. The
outputs may be used in either a balanced or unbalanced
configuration. Requires low voltage AC power (See MXT-1).
L
L
L
L
MODEL MX404
4
3
2
1
L
=6dB Pad

Protech Audio Corporation 192 Cedar River Road Indian Lake New York 12842 Voice 518-648-6410 Fax [phone]
PROTECH ®INSTALLATION & OPERATION
MANUAL
MX404 AUDIO LINE MIXER, Rev. A
POWER INPUTS AND OUTPUT
GROUND LIFT
FUSE
POWER ON INDICATOR
4.5"
3.375"
SOCKETED IC'S
1.0"
MOUNTING
HOLES
ALL
QUICKTRACK
PRODUCTS
USE
CONSISTENT
GROUNDING
SCHEMES
AND
PACKAGING
WWW.PROTECHAUDIO.COM
6dB pads
SH
LO
HI
UNBALANCED LINE OUTPUT
CONNECTION
SH
LO
HI
BALANCED LINE OUTPUT
CONNECTION
POWER FROM
MXT
TRANSFORMER
RED - AC
BLACK - AC
GREEN - (GND)
SH
LO
HI
UNBALANCED LINE INPUT
CONNECTION
BALANCED LINE INPUT
CONNECTION
SH
LO
HI
MICROPHONE INPUT
CONNECTION
SH
LO
HI
18
VAC
18
VAC
G
N
D
INPUT #3
- +
INPUT #2
- +
INPUT #1
- +
S
HS
H
CONNECTIONS
INPUT #4
- +
OUTPUT
- +