Question about Xantech PA1235X Amplifier

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POWER SURGE AFTER A LIGHTNING STRIKE NEARBY, ONE CHANNEL LIGHT ON AMP STAYS ON, SPEAKER CONNECTED TO RIGHT SPEAKER OUTPUT ON THE LIT CHANNEL WAS FRIED. WHEN POWER TO THE AMP IS REMOVED A LOUD BANG IS HEARD.

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Sounds like DC on that output.
needs service possibly fried all the output transistors on that channel

Posted on Aug 01, 2008

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What is the first thing to check after a power surge caused by a close by lightning strike?


See if everything works. Stereos & TV's are usually the first to go. Items with digital devices go next analogs after that & grounded devices last. A whole house surge suppressor costs about 50 bucks and is just a few wires to connect & at the very least wall adapter surge suppressors should be connected to everything.

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Service manual schematics


It sounds like the device may have been damaged by a power surge. If this is the case, it will not be covered by the manufacturer's warranty. If you had it attached to a surge protector that has a connected equipment warranty (and the device was still damaged), contact the manufacturer of the surge protector and tell them what has happened. They will be able to help you further.

If the router wasn't connected to a surge protector, your only option is to purchase a new router.

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Polaroid FLM-3701 power


Unfortunately modern televisions and monitors are full of electronic semiconductors of which many are likely have got destroyed along with your original power supply during the storm. A nearby lightning strike will send high voltage spikes down aerial cables as well as through socket outlets.
If you have contents insurance you should be able to claim for a new monitor.

Nov 09, 2013 | Polaroid FLM-3701 Television

1 Answer

Sherwood rv 5030r


Sounds like it is going into protect. This is usually caused by a problem in the amplifier section. I would start by making sure none of the output transistors are shorted.

Jul 08, 2013 | Audio Players & Recorders

1 Answer

Our electricity went out for a few minutes, and since then the TV will not turn on. The green light is flashing. We tried resetting it by pushing a pen point into the reset hole, but it does nothing. ...


Your power outage may have been caused by a nearby lightning strike, or any number of
1000 different reasons that cause power surges, brown-outs, voltage spikes, inductive loading,
and/or utility pole breaker trips and resets (this accounts for your power loss (a pole breaker trip),
followed by restoration of power (the pole breaker automatically reset) - even plain old high electrical demand causing an overload due to air conditioning demands caused by hot weather.
When the pole breaker reset, your TV caught a power surge.
Whenever a power outage occurs, quickly power off (or better, unplug) any/all computers, TVs,
etc. that are not protected by surge-protection.
As an electrician, when someone loses an item of electronics concommitant to an electrical
anomaly, its almost
always traceable to a nearby lightning strike (or the power company provided equivalent), accompanied by inadequate surge protection for
the VCR/TV/Computer/Stereo/uninsured valuable electronic item/XBOX 360/Nintendo Wii.
Surge protection can
be provided by the consumer at the power strip (a good one with builtin MOV protection and a
warranty costs $20, whereas a zero-protection 4-outlet or 6-outlet power strip will cost $4-$5).
Your electrician can provide whole-house surge protection where a whole-house MOV-based (metal oxide varistor) surge protector, or per-circuit protection can be installed with
a GFCI breaker (or better, an AFCI breaker) can be installed.
GFCI = ground fault circuit interruptor
AFCI = Arc fault circuit interruptor
Lightning protection is especially important in Florida, which is the "lightning capital of the world."
I've never found a good solution to lightning-fried electronics (random power supply components are destroyed and/or fuse blown), other than renters insurance or homeowners insurance.

Your only real hope for an economical fix is to look for a blown fuse, and replace it.

If desperate to attempt a fix on your own, you could try replacing the entire TV power supply as a module, but even this provides
no guarantee of a fix - lightning damage can extend beyond the power supply.
When traveling, I will always unplug everything before I leave (except the security system),
and also turn off the breakers to unneeded house circuits (which kills the wall switches that
control interior lighting - forcing a burglar to use their flashlight instead of interior lighting)
which is the least convenient lightning protection, but highly effective, and cheap (free).

Sep 05, 2011 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

One channel thermal overload stays lit and no output from that channel. even after unit sits overnight, thermal light on immediately,unit not hot. Looking for schematic?


Red light is on if:
- thermal protection, overheated amp, bad thermo sensor
- DC at speaker terminals
- high current at output transistors
Also could be a protection circuit malfunction.
In any case you need new channel module or send your module or whole amp for repair here.
Thanks,
Paul

Jul 12, 2011 | Adcom GFA-7607 7-Channel Amplifier

1 Answer

The DDT light on one channel stays on,but I can't find a reason why? What can I do?


Disconnect the speaker wiring and speaker on the bad channel. Turn the level control(s) all the way counterclockwise and turn the amp on. If your DDT (limiting) light remains lit, it's time for a visit to your nearest certified Peavey service center....G.

Feb 05, 2010 | Peavey Pv 2600 Power Amplifier

1 Answer

G5 right audio channel appears to have died


If this is a completely new problem and was working fine in the past you may be correct..this may be the result of something fubar...however, you may (just to be sure) want to check every time preference and advanced property of your sound drivers. For instance, if you are using a Conexant Audio driver you will want to go into the sound properties and click on the advanced properties for your speaker output device and make sure things like balance and levels are showing up balanced etc within the audio driver properties. Also the driver properties may come with a configure button. Try to configure the audio where you may get a "test" feature that would test each speaker channel individually.

Other than that there's not going to be much more to do other then trying to reinstall the audio drivers from your computer manufacturer's website or, worst case scenario, go with an inexpensive sound card. Best of luck.

Dec 20, 2009 | Apple Power Mac G5 Desktop

1 Answer

Amp Power light will not go on. Protection light is lit- Thump sound in speakers


It probably has shorted output transistors. To eliminate other possible causes, read through the following page.

Amplifier in Protect Mode - Troubleshooting

Let me know if you have any other questions.

Oct 31, 2008 | Visonik Dual Bass Box with Amplifier Car...

2 Answers

Kenwood basic M2 Amp Lightning strike


you can check the output transistors for short circuits with the low ohms range or diode checker . If they have failed, then it is often a good idea to replace all as much stress can be placed on an output array in this type of failure. to repair reliable, all outputs on an offending channel should be replaced.

Make sure the fuse you replaced was the same type of fuse. check markings.... T stands for sloblo... a fast blo duse may let go at turn on. The power supply may have a shorted rectifier diode in it also.

be aware however, every time a fuse of that rating blows... more damage may be occurring to the amp.

Dec 11, 2007 | Kenwood VR-407 Receiver

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