Meyer Sound MPS-488HP - Manual (Page 10)

CHAPTER 2: MPS-488HP FRONT AND REAR PANELS
10
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 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 con-
nected loudspeakers from surges and shorts. When a green
Voltage LED blinks and its corresponding blue Load Current
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 green Voltage LED is unlit
and its corresponding blue Load Current LED is
blinking, 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 Inputs for receiving source audio, eight Chan-
nel 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 twist-lock AC Input con-
nector (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-488HP operates at an AC volt-
age 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 11).
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
Blinking
(all LEDs)
Internal failure encoun-
tered Service required
Blinking
(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 increases None required
!
MPS-488HPp Power Supply Rear Panel
MPS-488HPe Power Supply Rear Panel
MPS-488HP Channel Inputs