Meyer Sound MPS-488HP, Operating Instructions Manual, Page: 8 / 36

CHAPTER 2: MPS-488HP FRONT AND REAR PANELS
8
Green Load Current LEDs (1–8)
The green Load Current LEDs indicate whether loudspeak-
ers are connected to the channel outputs and receiving
power. As a channel’s audio signal level increases, its LED
glows brighter. If an LED is not lit, check that the channel’s
Voltage LED is lit and verify the cable connection to the
loudspeaker. The MPS-488HP’s intelligent circuit protection
shields connected loudspeakers from surges and shorts.
When a green Load Current LED flashes and its correspond-
ing blue Voltage LED is unlit, a surge or short has been
detected for the channel. If a surge or short is encountered,
power down the MPS-488HP and inspect the loudspeaker
cabling for that channel.
Table 2 lists the possible states for the Load Current LEDs.
CAUTION: When a blue Voltage LED is unlit and
its corresponding green Load Current LED is
flashing, indicating a surge or short for the channel,
power down the MPS-488HP and inspect the loud-
speaker cabling for that channel.
MPS-488HP REAR PANEL
The MPS-488HP rear panel includes an AC Input connector,
eight channel XLR inputs for receiving source audio, eight
channel outputs for delivering DC power and balanced
audio, and seven Link switches for routing audio from inputs
to outputs.
AC Input
The MPS-488HP has a powerCON 20 twist-lock AC Input
connector (line, neutral/line, earth). The connector can
accept different power cable types for outlets used through-
out the world. Make sure to use the correct power cable for
the AC power in your area. The MPS-488HP operates at an
AC voltage range of 100–240 V at 50–60 Hz.
Channel Inputs
Up to eight channels of balanced audio are received from the
MPS-488HP’s eight channel inputs. The inputs are equipped
with XLR female connectors (pin 1, ground; pin 2, signal pos-
itive; pin 3, signal negative). Make sure to use standard bal-
anced XLR cables with all three pins connected on both ends.
Channel inputs default to being routed to their correspond-
ing channel outputs but can also be routed to adjacent out-
puts with the Link switches, though this affects their input
impedance (see “Input Impedance for Linked Channel
Inputs” on page 10).
Table 2: Load Current LEDs
State Cause Recommended Action
Unlit
(all LEDs)
MPS-488HP not pow-
ered on or no loudspeak-
ers connected Verify the MPS-488HP is
powered on and verify its
power source; inspect
the loudspeaker cabling
Unlit
(single LED)
No loudspeaker con-
nected Power down the
MPS-488HP and inspect
the loudspeaker cabling
for the channel
Flashing
(all LEDs)
Internal failure encoun-
tered Service required. Power
down and disconnect the
MPS-488HP, then con-
tact Meyer Sound
Flashing
(single LED)
Surge or short encoun-
tered for the channel
(corresponding Voltage
LED is unlit) Power down the
MPS-488HP and inspect
the loudspeaker cabling
for the channel
Glows
brighter
(single LED)
LED glows brighter
as channel’s audio
signal level increases None required
!
MPS-488HP
P
Power Supply Rear Panel
MPS-488HP
E
Power Supply Rear Panel
MPS-488HP Channel Inputs