Chapter 2: The Mps-488 Power Supply; The Mps-488 Pfront Panel - Meyer Sound HMS-10 Operating Installations

CHAPTER 2: THE MPS-488
The MPS-488 power supply delivers DC power and bal-
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anced audio to Meyer Sound loudspeakers that require a
48 V DC external power supply. The MPS-488
channel, switched-mode, regulated power supply that occu-
pies one space in a standard 19-inch rack. The MPS-488
was originally designed for use with the MM-4XP miniature
loudspeaker. While the MPS-488
MM-4XPs, it can only power up to four HMS-10s (because
of the HMS-10's additional current draw).
X
X
MPS-488 with Four HMS-10s
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NOTE: The MPS-488 power supply is available
in two models: the MPS-488
equipped with Phoenix 5-pin male output connectors
(recommended for use with the HMS-10), and the
MPS-488 , which is equipped with EN3 5-pin female
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output connectors.
POWER SUPPLY
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is a multi-
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can power up to eight
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X X X
X X X
, which is
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THE MPS-488
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The MPS-488 front panel includes a power switch, LEDs
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for monitoring each loudspeaker channel, and fuses for
each channel.
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MPS-488 Power Supply Front Panel
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AC Power
The MPS-488 is powered on and off with the AC Power
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switch.
Voltage and Load Current LEDs (1–8)
The Voltage and Load Current LEDs are useful for verifying
whether each channel output has voltage and whether the
connected loudspeakers are receiving DC power and audio.
MPS-488 Channel LEDs and Fuses
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Voltage LEDs (1–8)
The blue Voltage LEDs indicate whether voltage is present
for each channel output. These LEDs should be lit when the
MPS-488 is powered on. If a channel is not lit, its fuse may
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need to be replaced. If a group of two Voltage LEDs is not lit
(1–2, 3–4, 5–6 or 7–8), one of the four MPS-488
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.
FRONT PANEL
internal
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