Chapter 2: The Mps-488 Power Supply; The Mps-488 Front Panel; The Mps-488 Rear Panel - Meyer Sound MM-4XP Operating Instructions Manual

CHAPTER 2: THE MPS-488 POWER SUPPLY

The MPS-488 power supply was designed to deliver DC
power and balanced audio to up to eight MM-4XP loud-
speakers. The MPS-488 is a switched-mode regulated
power supply that occupies one space in a standard 19-inch
rack. There are two MPS-488 models available: the
MPS-488 , which has Phoenix 5-pin male output connec-
P
tors, and the MPS-488 , which has EN3 5-pin female output
E
connectors.

THE MPS-488 FRONT PANEL

The MPS-488 front panel includes a power switch, LEDs for
monitoring each of the eight loudspeaker channels, and
fuses for each channel.
MPS-488 Power Supply Front Panel
P
AC Power
The MPS-488 is powered on and off with the AC Power
switch.
Voltage and Load Current LEDs (1–8)
The Voltage and Load Current LEDs are useful for verifying
whether each of the eight Channel Outputs have voltage
and whether the connected MM-4XP loudspeakers are
receiving DC power and audio.
MPS-488 Channel LEDs and Fuses
Voltage LEDs (1–8)
The blue Voltage LEDs indicate whether voltage is present
for each of the eight Channel Outputs. These LEDs should
be lit when the MPS-488 is powered on. If a channel is not
lit, its fuse may need to be replaced. If a group of two Volt-
age LEDs is not lit (1–2, 3–4, 5–6 or 7–8), one of the four
MPS-488 internal power supplies may have failed.
Load Current LEDs (1–8)
The green Load Current LEDs indicate whether a loud-
speaker is connected to the channel and receiving power.
As a channel's audio signal increases, its LED glows
brighter. If an LED is not lit, check that the channel's Voltage
LED is lit (the fuse is working) and verify the cable connec-
tion to the loudspeaker.
Fuse Slow Blow (1–8)
Each loudspeaker channel is protected with its own fuse. A
maximum of one loudspeaker can be connected per chan-
nel; connecting more than that could cause the fuse to be
tripped.
NOTE: When replacing fuses, make sure to
use a 2-amp, 250-volt slow-blow fuse (T2A-
250V). These fuses are available from Meyer Sound
(PN 420.027).

THE MPS-488 REAR PANEL

The MPS-488 rear panel includes an AC connector, eight
Channel Inputs for receiving source audio, and eight Chan-
nel Outputs for delivering DC power and balanced audio to
the MM-4XP loudspeakers. The rear panel is different for the
two MPS-488 models: the MPS-488
male output connectors, and the MPS-488
female output connectors.
MPS-488 Power Supply Rear Panel
P
MPS-488 Power Supply Rear Panel
E
AC Input
The MPS-488 has a PowerCon twist-lock AC connector
(line, neutral/line, earth). The connector can accept different
power cord types for outlets used throughout the world.
Make sure to use the correct power cord for the AC power in
your area. The MPS-488 operates at an AC voltage range of
100–240 V at 50–60 Hz.
has Phoenix 5-pin
P
has EN3 5-pin
E
9