UAD‑2 Live Rack Manual
Chapter 2: Hardware
20
(2) PSU Indicators
These indicators display the status of the rear panel dual redundant internal power
supply units (PSU). There is one indicator for each power supply unit (PSU 1 and PSU
2). The color of each indicator displays the status of the PSU as follows:
White – The PSU is operating normally. The PSU is connected to AC power, and the
power switch for the PSU (rear panel) is in the ON position.
Red – The PSU is not delivering power. This state is caused by one or more of the
following conditions:
• The PSU is not connected to AC power
• The power switch for the PSU is in the OFF position
• The PSU has malfunctioned
PSU Indicator notes:
• If one internal power supply unit fails, UAD‑2 Live Rack will continue to process
audio signals.
• It is normal for the PSU indicator to flash red upon power up of the hardware
(3) POWER Indicator
The Universal Audio text and logo are lit when the hardware unit is receiving proper
operating voltages from one or both internal power supply units.
(4 & 5) MADI Indicators
These indicators represent whether or not MADI digital audio signals are present at the
rear panel MADI I/O connectors. There is one indicator for MADI input and one for MADI
output. The state of each indicator represents the MADI signals as follows:
White (bright) – The audio level of any channel in the MADI stream is above ‑60 dB.
White (dim) – The MADI stream is detected but no channels are above ‑60 dB.
Black (off) – No audio signals are present in the MADI stream.
(4) MADI IN Indicator
Indicates the state of digital audio signals at the rear panel MADI input connector.
(5) MADI OUT Indicator
Indicates the state of digital audio signals at the rear panel MADI output connector.
(6) RESET Button
This recessed button executes a hardware reset and initializes the unit. Reset should
only be performed if there is an unrecoverable failure and all other troubleshooting
techniques are exhausted.
Note: Pressing this switch interrupts power to the UAD-2 Live Rack hardware unit.
It performs the same function as manually turning off the unit with the rear panel
PSU switches.
