Owner's Manual

11
Front Panel Operation
On-Off Button
Push once to turn on the A 52+. When the A 52+ is turned on the dim blue glow around the
On-Off button will become brighter and the five blue channel indicators will illuminate. Push
the button again to turn off the A 52+. The front panel On-Off button will be disabled when the
Turn On Options switch is set to Audio or 12V.
Whenever the A 52+ is turned on, the soft blue glow behind its On-Off button changes
to red for a few seconds until its internal circuits stabilize. Then the red glow is replaced
by a brighter blue glow to indicate normal operation. If the glow remains red after turn on
or while the amp is playing, it indicates activation of the A 52+’s protection circuits and no
sound will be heard from the speakers.
The A 52+ protects itself from external conditions such as excessive heat, load impedance
that is too low, or a short-circuited speaker connection or wire. After you correct the fault,
the A 52+ will resume operation. If the A 52+ remains in “protection mode” after it has cooled
down and you’ve confirmed there are no external faults, it could indicate an internal problem.
Please contact Parasound’s Technical Service Department.
Channel Indicators
When all five blue channel indicators are lit, the A 52+ is operating normally. If one or more of
the indicators does not light, even though the amp is turned on, there is a fault in your system.
In the case of a fault first check that there is no short circuit with your speaker wire or
speakers.
Hi Temp Indicator
This indicator is near the right side of the panel recess. It will glow red if any channel
overheats. The On-Off button will also glow red if the A 52+ overheats. If such a condition
occurs you must provide for better ventilation around the amplifier or check speakers for faulty
operation that is causing the A 52+ to overheat.