Question about Pioneer VSX-D711 Receiver

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Pioneer D711 I have same "AMP ERR" intermittently. Service manual diagram shows the cause is from DC on any amp output. Most probably cracked solder joint. How did you remove the amp board to get to the solder side? It looks like a serious dis-assembly is required

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Hi...
Is there an access cover with screws in it underneath?
MOst of the receivers have something like that.
I would also check the output PCB assby for shorts or opens.

Posted on Mar 24, 2009

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'AMP ERR' APPEAR AFTER TUNE+ AND AUTO SURROUND/STREAM ARE PRESSED.


Assuming this is on a pioneer receiver - you have a shorted amp channel. output transistors and probably some burnt resistors will need to be replaced.

Dec 20, 2016 | Audio Players & Recorders

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All 5 speaker outs have 12.6V of DC power. How to fix?


Check for Ground Lines



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It could be anywhere from a loose/missing screw , cold solder joint on J13


What important is that the Speaker Negative Terminal is directly

connected to the secondary center-tapped terminal of the transformer

and the chassis of the amplifier.

Aug 13, 2012 | Pioneer VSX-D309 Receiver

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Pioneer vsx_D710S whatever can be the input source,the flag " poweroff" apears and switch off the system. Seems to have no time rules, shut down frequency connected with hazard ...... No...


I'm not sure what kind of an answer you are looking for. If you are not qualified to do some soldering rework and ready to spend some money (could be as much as 50$) for parts, you better look for a professional service that in most cases will cost as mush (or more) as your receiver.

If you are still reading then here you are. This is a common symptom of a blown hybrid amplifier IC caused by shorting speaker output while it's powered on. There are two protection circuits for amplifier output, Overload and DC output. In your case, most probably, DC output protection is the one that shuts down amplifier to prevent further damage. Find schematics (service manual). To confirm this, look for amplifier inputs connector, measure DC DET. signal, normally it should be around +4.85V. If right after power up it goes down to almost 0V, then it is for sure a blown output on a Hybrid IC. Check whether receiver shuts down with that cable unplugged. If not than get ready to do some rework.

There are two big Hybrid amplifier ICs, one that outputs two channels (usually front left and front right) and 3 channels (for the rest). One of the outputs (if not more) one one of them (if not both) is blown. In most of the 5.1 Pioneer receivers 2 channel IC is PAC010A and 3 channel one is PAC011A. If you want to get original parts and will find those for less then 40$ each you are lucky. There are however cheaper replacements from SANYO, those you can find for around 10-15$.

Find schematics, unsolder resistors one by one that connect AMP outputs to DC detection circuit on each IC and check which one is blown. There are 2 for 2 channel one and 3 for the other. Usually if one output is blown all others on the same IC are blown.

There could be a chance that only one channel on IC is blown, if you want to fix it you still need to replace whole IC. Also, instead of spending on new IC you may want to sacrifice one working channel (center for example) to output the blown one (so you'll get 4.1 :) ).

Nov 11, 2010 | Pioneer VSX-D710S Receiver

1 Answer

Amp err turns on then turns off


YOU CAN GET SERVICE MANUAL FROM HERE electrotanya.com http://elektrotanya.com/pioneer_vsx-d510-rrv2439_av-multi-channel-receiver.pdf/download.html
the amp is going into protection mode ...normally one of the amplifier modules are faulty..check for DC on speaker outputs just as you turn on from standby...find the 1 with dc on it normally .identify amp module from manual change modules ic ..jod done...sounds simple put it isnt...yammandan

Aug 19, 2010 | Pioneer VSX-D510 Receiver

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Alesis SR-16 distorted sounds


The distorted and low volume output plus noise is usually caused by using the wrong power supply adapter. The Alesis SR-16 takes a 9V "A/C" supply not "DC". The A/C supply provides a negative voltage swing which wouldn't exist with a DC supply. So check and make sure you have 9V A/C output supply not DC.

Nov 18, 2008 | Alesis Sr 16 Stereo Drum Machine

2 Answers

Amp error


AMP_ERR means the unit is detecting DC on the output of one or more amplifier channels. This is either the result of a failed/shorted amplifier (or other component) or bad solder joints (as mentioned above).

Dec 23, 2006 | Pioneer VSX-D711 Receiver

3 Answers

Amp error


I had this exact same problem, it can indicate that there is an impedance mis-match somewhere. i.e. using 4 or 6 ohm speakers instead of 8. However if you unplug the speakers and it is still doing it then you could have a problem with the actual amp circuit.

Mine was doing it with nothing plugged in and had dry solder joints on the circuit board with the two large output devices are. Simply resoldered those and it is fine now.

It had started crackling before it stopped working all together, which would also indicate the start of dry joints or bad connections somewhere.

Regards,

Rolf.

Apr 24, 2006 | Pioneer VSX-D711 Receiver

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