Meyer Sound MPS-488HP - Manual (Page 9)

9
CHAPTER 2: MPS-488HP FRONT AND REAR PANELS
MPS-488HP FRONT PANEL
The MPS-488HP front panel includes a power switch and
LEDs for monitoring each loudspeaker channel.
AC Power
The MPS-488HP 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 Channel Output has voltage and whether the
connected loudspeakers are receiving DC power and audio.
Blue Voltage LEDs (1–8)
The blue Voltage LEDs indicate whether voltage is present
for the Channel Outputs. These LEDs should be lit when the
MPS-488HP is powered on. The MPS-488HP’s intelligent
circuit protection shields connected loudspeakers from
surges and shorts. When a blue Voltage LED is unlit and its
corresponding green Load Current LED is blinking, 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 1 lists the possible states for the Voltage LEDs.
CAUTION: When a blue Voltage LED is unlit and
its corresponding green 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 Power Supply Front Panel
MPS-488HP Channel LEDs
Table 1: Voltage LEDs
State Cause Recommended Action
Unlit
(all LEDs)
MPS-488HP not pow-
ered on Verify the MPS-488HP is
powered on and verify its
power source
Unlit
(single LED)
Surge or short encoun-
tered for channel (corre-
sponding Load Current
LED blinks) 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)
Residual voltage
detected for channel Unplug and plug the
channel’s loudspeaker
cable; if the problem per-
sists, verify the loud-
speaker cabling
Glows
brighter
(single LED)
LED glows brighter as
channel’s voltage level
increases None required
!