Question about Behringer XENYX XL1600 Live Mixer

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Power supply dead

Mixer is s/c across mains inlet socket following lighting discharge near house. No apparent burning damage inside. Suspect psu but would ask advice before venturing in with soldering iron.

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Open up unit. Grab a tester. In Continuity mode check if transformer input AND output are either open or shorted. If not, power up and check (in tester AC mode) voltage input and output of same. Input should be 120 and output around 24 or so.
If not, change transformer.
Iy yes, check voltage regulators on PSU (tester in DC mode). There should be a +15 and a -15 regulator (usually three feet, little square things on a heat-sink). Check those voltages on the THIRD foot from the front. If gone, replace.
Hope that helps....

Posted on Jan 22, 2014

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It's encouragin! I got the same issue this night with my oe .. and here I don't see answers ...

Posted on Nov 27, 2013

  • Tormy Van Cool
    Tormy Van Cool Nov 27, 2013

    it's encouraging! I got the same issue this night with my oe .. and here I don't see answers ...

  • Tormy Van Cool
    Tormy Van Cool Jun 06, 2014

    I finally found back this post to vote it. yes it was the power supply :)

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If the unit is totally dead, the main board most likely is blown. You say you checked the "fuse"--is there a fuse on the dishwasher or are you referring to the electrical panel fuse box in your house? Did you recently have a power outage? Usually, within 3-4 weeks after having one, appliances will start failing due to damaged chips on the main control boards. The problem could also be a damaged user interface board. If 120volts is getting to the main board but the unit is dead, I'd highly suspect the board is bad. I've also seen lots of bug infestation damage to boards--classic signs are roach tracks in and around the boards--they're attracted to the warmth and will walk across the live boards, shorting them out.

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First of all; it is DANGEROUS to fix a power supply if you don't know what you are doing. Thus; don't even think about to open power supply tower, if you are not qualified enough.

If you are a qualified person, you can go on with below steps by taking risk on your own.

You must discharge biggest capacitors in order to avoid any fatal electrical shock. Even it is disconnected from electricity plug, power supply may keep high voltage in it for long time. Once you discharge big capacitors; you may diassemble power supply tower. At your question you mentioned about burned power supply which makes it a little bit easier. (I assume you discharged big capacitors) Once you open psu tower; do visual inspection on each capacitor. If there is a burned area start with it. Remove blowed capacitors and replace them with same valued new capacitors. If you can't see the values on blowed capacitors; you need to find board diagram of your psu. Otherwise you can't find suitable one to replace. Besides; check form of other capacitors. If there is a change on any capacitor's form, replace them too. The best way to find out dead capacitors is using capacitor testers. If problem caused by another type item; its not easy to find it as finding bad capacitors.

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Could be a failing power supply as you suspect. You don't indicate the age of the equipment, but that could be a factor.

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If the PSU fans only work for a short time usually this means that the PSU is shot

If you suspect your power supply has gone bad, there are a few basic things you can do to test it. First, plug the computer in and try to start up the computer. If the computer can start up or shows signs of having power (the hard drives spin up, or the fans turn on) the power supply might be fine, and you may have an issue with your motherboard or RAM. If the computer won't start at all, open the case and then turn the power supply on and attempt to start the computer. Observe the motherboard to see if any lights turn. If no lights turn on and there is no sign that power is being supplied to any of your devices, there's a decent chance that the power supply has burned out. If your computer experiences periodic crashing, feel the case near the power supply to see if it is hotter than normal, and smell the air. If the case is much hotter than normal or you smell burning, your power supply might be overheating, and may be damaged. http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm hope this helps

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using any multimetr test PSU if OK, then disassembly laptop housing plug PSU in power socet and test power output from power socet to motherboard, iuf OK then look for fuse near power socet on motherboard and test it

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We have PDV42S10, There is no power to TV. The green light does not come on. There is power in socket . Thank you


In most cases, if the main power supply fails, the low voltage supply that provides enough power so the set can receive input from your remote, also lives on to signal problems, often by flashing the power LED in a pattern.

In your case, apparently the low voltage supply is also dead.


This can be caused by both supplies being damaged from a line surge caused by 'dirty' AC power, or a spike from a lightning strike somewhere in your power network.

These spikes can travel long distance so a strike need not be all that proximate to do damage.


If no fuse holder is found on the back of the set, it may be necessary to remove the back panel for access.

If you choose to do this, it is safer to leave the set unplugged overnight to allow any hazardous voltages to discharge.


Look for a separate board or an area which has larger components in it.

These will be cylindrical cases and larger block-like parts.

If there is a user-replaceable fuse in the set at all, it will most likely be in that area.


If this damage was caused by a high voltage spike replacing the fuse may be fruitless and if a replaced fuse blows again, then other circuits have been damaged and major boards will have to be replaced as well.

The cost of reviving a lightning damaged set of any kind can often exceed the cost of replacing the whole set.


Even the most primitive plug strip contains components that afford some protection against this kind of damage but the best protection can be had with a 'whole house' surge suppressor.

These cost ~$200 US and feature insurance against appliance losses up to $10,000.

They require access to the main breaker box, safety precautions and a few tools for installation.

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I have a burning smell when i turn the mixer on and the gears dont change fast enough.


Get a copy of the Repair Part List for your model from Kitchenaid.com
Remove the motor housing, lift the main motor away from the transmission housing and
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When that happens it is usually the motherboard.

To test parts you need a benchmark.

PSU can be tested using a multimeter.

Motherboard is tested using a tester like this one: PCI Test Card, PC Analyzer, Motherboard Test Card
Ram and CPU (CPU sometimes get damaged) are usually not damaged by this kind of problems, they can be tested mounting them on a working motherboard. For the RAM we also use a RAM tester that costs about $200.

Ensure also that the switch contacts to new motherboard are installed properly. A technician can test cabinet power switch using a multimeter, or carefully bridging with a screwdriver the switch on contacts on motherboard (do not do this unless you are sure about what you are doing)

Test the new PSU on a different socket, when a PSU blows , it may damage the main socket.

Also remember that new power supply units have two connectors. The big rectangular main one (24 pin) and a smaller 4 pins squared one.

As an home user you may not have access to testing equipment, therefore my suggestion is.

Ensure you are using the right PSU.

Ensure that the motherboard is connected to power switch.

Test the new PSU with a multimeter.

Examine the motherboard for blown or leaking components and burnt areas.

If you do not find anything, but the mainboard is still not working, then buy a motherboard-cpu bundle compatible with the PSU that you bought and assemble a new system inside the old cabinet.


Regards.

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2 Answers

I have a emachine PC. PowerSupply blew up. changed it still down


Dear,

ELECTRIC SHOK OR IMPROPER EARTHING IS DAMAGE POWER SUPPLY,MOTHERBOARD,PROCESSOR,RAM
HOW TO CHECK IT.

(WHEN CHECKING KEEP CAUTION :- REMOVE HARD DISK DRIVE POWER SUPPLY SOCKET)

1. check power supply watt 400/450 and same another power supply install and check it. if power supply change and system is working ok so problem in your power supply.

2. check CMOS cell on motherboard,(3 volt)

3. Bfore power supply changing check on mother board any capasitor is like as damaged or not.
OR check main chipset ic is marked as intel.whenpower on it is very hitting or
normal)if very hitting require to repair your motherboard.(intel chipset ic near cmos cell or pci slot,)
4. checking of ram on other pc (working or not)(one beeps coming or not,if one beep coming ram is working ok)

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1 Answer

NO VIDEO SIGNAL


You'll need to check the PSU first, you might want to buy a PSU Tester for 24pin PSUs.

Then you might want to do a in depth examination of your motherbard circuit components by doing the following...

Look for burned/broken microresistors. You might need a magnifying glass and good lighting. Any resistor showing a little blob or browning is burned. Microresistors are those minuscule black,gray,brown or white rectangles lying all over the motherboard's traces. Check first the ones near the power supply connector and near the chips, specially one that says winbond on it, this last ones may get burned from USB overloading, from using non-self powered hubs also called passive hubs.

You may check for blown capacitors, capacitors are those standing cylinders with a plastic cover around them with numbers and letters printed in those covers. On top they are left without a cover and they are aluminum color, they may be flat or have one or more grooves runing across the top. A blown capacitor, looks different from the others because it looks a little bloated on the top, or may have spilled some sort of transparent varnish from its bottom to the motherboard or its top to other components around.

Finally you may suspect of the CPU, athlons get very warm and they can get burned too. Never start your pc without a cpu.

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