Question about Audio Players & Recorders
Protection Protection mode
Posted by Anonymous on
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: Protection mode
I banged my head against the wall on this same issue and finally realized that my rear surround speakers were mixed. My rear right was wired to rear left because I was turning around to see L and R. It would shut off at about volume level 40, which was loud but not rumbling. It now ROCKS and is in no way a problem with heat. I have always run it with the cabinet open to allow air to circulate.
Posted on May 30, 2008
SOURCE: amp comes on and goes
Protection is usually a sign of overheating or something is wrong at the power amplifier's output.
Theory: Protection is a delay and sometimes an internal test to allow the electronics to stabilize during power up before they are allowed to interact with the speakers. The most common cause of it remaining ON is that a speaker cable pair is shorted. Some isolation is required...
1. Turn the Power OFF.
2. Disconnect each set of the speaker wires that are directly attached to the receiver. Mark them so you remember where each one went. pay special attention to which conductor is on "+" or "POS" and which is on "-", "COM" or "Ground". You may elect to disconnect them one pair at a time if your sytem is complex and you don't want to lose track of where things were.
Turn the Power ON. Is the "Protect" indication gone from the display?
If YES, you have a shorted speaker wire or speaker. To isolate the specific cause:
1. Turn the Power OFF.
2. Attach ONE speaker wire pair at a time and test it by turning the Receiver ON. When the "Protect" light returns you have isolated at least one of the cause(s). Disconnect the defective speaker cable and continue isolation of all speaker cables. Visually examine the cable at both ends for frayed wires that could touch each other or contact metal on the receiver or other objects.
To isolate further within the cable/speaker pair - disconnect the speaker end of the cable on the failing path. Try another cable that you know works, or at least one that doesn't cause Protection to stay on.
If you're electrically savvy and have a Digital Volt/Ohm Meter you can troubleshoot the short(s) with it.
If NO, there is probably an internal problem.
Is it solid or does it come on after the Receiver has been ON awhile.
It could be overheating.
Is the unit hot to the touch?
Is there a cooling device (fan)?
Is it stopped or clogged with dust?
Is there adequate ventilation around the unit for air to flow?
Clean any ventilation slots on the top and bottom of the unit.
Avoid stacking components that produce heat under an amplifier or receiver. Their heat rises. Also keep them away from other heat sources like like home heating vents and radiators.
Problem solid and NOT related to the speakers or heat: internal malfunction.
Let me know.
Posted on Apr 06, 2009
Most often it will require an output IC, but I have seen it be a bad ground or a transistor in the protect circuit.
Posted on Oct 16, 2009
Tips for a great answer:
Nov 03, 2013 | Audio Players & Recorders
Mar 14, 2012 | Optimus STAV-3770 Receiver
Dec 29, 2011 | Optimus STAV-3350 Receiver
Sep 07, 2010 | Optimus STAV-3770 Receiver
Mar 26, 2010 | Optimus Audio Players & Recorders
Mar 01, 2010 | Televison & Video
Feb 04, 2010 | Optimus STAV-3770 Receiver
Dec 11, 2009 | Optimus STAV-3690 Receiver
Oct 16, 2009 | Optimus Audio Players & Recorders
Dec 12, 2007 | Optimus STAV-3770 Receiver
83 people viewed this question
Usually answered in minutes!