Parasound A 52 manual AC Present Indication, On, Off and Fault/Protection Status Indicators

Page 11

UNDERSTANDING THE INDICATORS ON THE A 52

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aAC Present Indication

When the A 52 is plugged into a live AC outlet, a soft blue halo glows behind its On-Off button and its red “P” Badge glows faintly. These indicate that the unit is plugged into a live AC outlet, even when it is turned off.

bOn, Off and Fault/Protection Status Indicators

Whenever the A 52 is turned on, the soft blue glow behind its On-Off button will change to red for about five seconds as 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” 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.

c – g Channel Status Indicators

These are the five small round indicators in the center of the recess in the front panel. The indicator on the left displays the status of channel one and the subsequent indicators display the status of channels two through five.

c – g All Indicators Illuminated

When all five channels are operating normally, these will all glow blue.

c – g No Illumination:

When the A 52 is turned off, these indicators are off. An indicator that does not glow when the A 52 is turned on represents a fault in that channel.

hHigh-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 and shuts down to protect itself. Refer to the Troubleshooting Guide on page 12.

L U C A S F I L M

On-Off

 

Hi Temp

 

 

 

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Contents Amplifier Keeping Records for Future Reference Thank YOUCongratulations and Thank You for Choosing Parasound Parasound Staff Unpacking Your aTable of Contents To attach the rack mount brackets Placement Guidelines for Your aRack Mounting Your Parasound a What You’ll Need Before ConnectingBalanced XLR Jacks and Their Pin Configuration Left and Right Balanced Input JacksWrite Down Your Connections Ch 1-5 Unbalanced InputsCorrect Speaker Polarity is Important Connecting Your Speakers to the aSpeaker Wire Length and Gauge thickness Speaker TerminalsManual and Automatic Turn ON-OFF Options Connecting an Active Audio Source for Automatic On-OffTurn Off Delay in the Audio Mode Audio Turn On Switch Set to down position Connecting AN External DC Source for Automatic Turn ON-OFFConnecting the a 52 to Trigger Another Component High-Temp Indicator On, Off and Fault/Protection Status IndicatorsChannel Status Indicators All Indicators Illuminated120 V or 220 V 240 V Operation Connecting the a 52 AC Power CordAC Power Connections Maintaining Your a Trouble Probable Cause Remedy Troubleshooting GuideImportant Notice Shipping the a Procedure for Returning Your a 52 to Parasound for ServiceServicing Your a If All Else Fails -Call Us for HelpTechnically Speaking Audio Trigger Sensitivity AdjustmentTechnically Speaking Circuit Designed by John Curl Parasound a 52 Design OverviewParasound a 52 Design Overview Parasound a 52 Specifications Parasound Products, Inc Battery Street, San Francisco, CA
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