Question about Acoustic Research P315 HO Speaker

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My p315 speaker stays on standby and won't power up?

Checked all wires & also when i turn it on goes to green for a second than back to red or stand by?

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Some design need audio signal in to get it wake up from standby mode.

Posted on Feb 04, 2014

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HK 3370 power button turns red when pressed device will not turn on


There may be a short on the output side. Try disconnecting all the speakers on the back of the amp. If the unit stays on after that, turn off the amp and carefully reconnect one speaker at a time. Try turning on the amp after each reconnection. This might isolate any shorts that might exist.

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Will not power on. The red standby light stays lit. The green light shows up for 2 seconds only when first plugged in and then goes back to red.


Solutions:
Check and Try
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2. Pull out flex cable of the ROM
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My Panasonic sa-ak770 will not come out of standby mode


Check to make sure there are no shorts in the speaker wiring, if okay remove speaker wires from back, press power if it comes out of standby the wires or speakers are the problem, if there is no change the protection circuit is not functioning or the audio output ic's have a short.

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Sony HCD LX20i audio shelf sysyem won't turn on. Standby light flashing. Disc stuck in it.


Check the speaker wires for shorts, if okay! suspect the audio output ic's, the protection circuit won't come out of standby because there is a short.

May 06, 2012 | Audio Players & Recorders

1 Answer

I have a JVC TH-C30 system, the red standby light comes on with power applied, but when I go to turn on the system, the standby light goes out, the system appears to be on, then turns itself off within...


When one reports a fuse replacement it would be helpful to know if that was a Hail Mary wild guess or if the fuse was indeed blown.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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1 Answer

Out of the blue I turn on my DAV-SC8 and after about 4 seconds the entire unit turns off ... even the red standby button goes out ... it is as though the unit dies. I switch off the wall plug and switch...


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Apr 28, 2011 | Sony DAV-SC8 System

1 Answer

Unit only stays on for 4 seconds then turns itself off.


This is a short or unstable ohm load. Remove all speaker wire connections to see if the amp will stay on.
If the problem goes away when disconnecting the speaker wires try this:
1) Check volume level on zone one and zone 2 if connected. If it is too high the amp will go into protect mode and shut off exactly as you described.
2) Make sure no wires are touching any other wire or the metal surface of the amp. This will cause a short and send the amp into protect mode.

Nov 21, 2009 | Denon AVR-1705 Receiver

1 Answer

After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

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2 Answers

Insignia nsr2000 on/off problem.


had the same problem... turns out the copper on my red and black speaker wire (on the speaker, not receiver end) was touching - causing my receiver to go to standby (self-preservation probably lol). i pulled the wires further apart so the copper ends weren't touching and that solved it.

Jan 20, 2009 | Insignia 200W Stereo Receiver

2 Answers

Sonamp 260 cuts out


Normally this denotes a protect condition. Remove the speaker wires from the back of the amp and see if the green light stays on. If this fixes the problem, then there is a short circuit in your wires, speaker level volume control or speakers. The amp sees the short and goes into protect. After a couple seconds it closes the connection again and if the short is still present it goes back into protect.

Aug 03, 2008 | Sonance Sonamp 260 MKII 2-Channel...

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