
MPX 423 A • Installation
2-3
2. Hold the switcher with attached brackets against the underside of the desk or
other furniture. Mark the location of holes for screws on the underside of the
desk.
3. Drill 1/4" (6.4 mm) deep, 3/32" (2 mm) diameter pilot holes in the table or
desk at the marked screw locations from the underside/inside (concealed
side) of the furniture, where the switcher will be located.
4. Insert the four wood screws into the pilot holes. Fasten each screw into the
installation surface until just less than 1/4" of the screw head protrudes.
5. Align the installed screws with the slots in the mounting brackets, and place
the switcher against the surface, with the screws through the bracket slots.
6. Slide the switcher slightly forward or back, then tighten all four screws to
fasten it in place.
Rear Panel Connectors
Figure 2-3 — Rear panel of MPX 423 A
1
AC power — Standard AC power connector for a power source of
100 – 240VAC, operating at 50/60 Hz.
2
VGA input group — Four female 15-pin HD connectors for RGB video input
(numbered 1 to 4).
3
VGA output — Two female 15-pin HD connectors for RGB video output.
4
Composite input group — Four female BNC connectors for composite input
(numbered 5 to 8).
5
Composite output — Two female BNC connectors for composite output.
6
S-video input group — Four female 4-pin Mini DIN connectors for S-video
input (numbered 9 to 12).
7
S-video output — Two female 4-pin Mini DIN connectors for S-video output.
8
VGA audio input — Four 3.5 mm female captive screw connectors for audio
input from the VGA group. For more information, see Audio in Chapter 3,
Operation.
9
Composite audio input group — Four 3.5 mm, female, captive screw
connectors for the composite group input. For more information, see Audio in
Chapter 3, Operation.
10
S-video audio input group — Four 3.5 mm, female, captive screw connectors
for the S-video group input. For more information, see Video/audio group
button in Chapter 3, Operation.
11
Variable audio output — Two 3.5 mm, female, captive screw connectors for
balanced/unbalance variable audio output.
50/60 Hz
100-240V 0.3A
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1
R
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LRR
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C
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RESETACT LINK
RS-232
LAN
1
2
3
4
1
5
6
7
8
19
10
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1
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COMPUTER IN COMPUTER OUT VIDEO IN S-VIDEO INOUT OUT COMPUTER VIDEO S-VIDEO VARIABLE
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14
1
12
2
4
11
7
5
3
6
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9
10
15
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