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Unit was clipping out @ high volume.

Disassembled, cleaned and applied new grease to heat sinks. Amp worked great for a while, clipped out and now occasionally will not light up the front display. Works well until display goes out. All fuses are good, no burn spots on board. Any hints? I know the fan is failing, but don't want to replace it IF there is a major underlying issue. The amp still produced out of both channels, and does when it decides to work. Once the front display goes blank, it stops working. When testing, I was running it without the cover with a large fan cooling the unit. I disassembled the unit, cleaned everything, applied new grease to the heat sinks, etc.. Fuses are all good, still have failed to note any obvious burn marks on the board or individual components.

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  • Master
  • 924 Answers

First of all, I would need to know the make and model number, rather than guessing. Second question, why are you driving the amp into clipping, if that's what you mean? That will destroy tweeter and midrange drivers. Certainly, if you are driving it into clipping, the heatsinks have got to be hot, and I don't believe an external fan will cool the right places. If you can get back to me with more information, you can contact me at my website, audioserviceclinic.com, to inquire about a repair. Thank you.

Posted on Nov 29, 2014

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Posted on Jan 02, 2017

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  • 113 Answers

SOURCE: Behringer EP2500 no output on CHANNEL 1

check all op amps for correct voltage swing +-should be equal,test output of op amps no voltage should be present, use chasis gnd as tester neg.check voltage regulation especially 12v or 15v +-.note some amps show unequal led indications when only 1 channel connected to a load.I will try to get some more info on this specific amp because i don't know this circuit well,keep in touch as you update though.

Posted on Aug 22, 2007

petraman7
  • 1175 Answers

SOURCE: Gem Sound XP-350 both channels failed

Speaker fuses are generally fast-blow styles 250 volt glass
If an amp shuts down, with speakers connected, it sounds like one of the power supply lines does NOT like what it's "seeing" . Probably output transistors bad ( or module)

Take it to a tech.

Scott out.

Posted on Jan 08, 2008

  • 1 Answer

SOURCE: yamaha m60 power amp

http://www.avsforum.com/avs-vb/showthread.php?t=885511

Posted on Mar 21, 2008

black dingo
  • 2 Answers

SOURCE: AMP PROTECT

MAKE SURE THAT YOUR POLARITY IS OK FOR THE SPEAKERS.TRY TO TEST THE VOLTAGE BEFORE STARTING THE ENG THEN AFTER AND SEE IF ITS THE SAME OR MUCH MORE.

Posted on Aug 23, 2008

gpgab97
  • 77 Answers

SOURCE: Solid State amplifier problems

I would look for crossed wires or shorts on the board itself as a result of overheating. They will look like toasted circles around the pins of the board. You may not have been the first to open the amp and make a repair.

Posted on Apr 30, 2009

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Technics SU-G91... clipped out @ high volume. Disassembled, sleaned and applied new grease to heat sinks. Amp worked great for a while, clipped out and now occasionally will not light up the front dis


First off, why do you drive the amp into clipping? It's not good for amp, nor your Klipsch. We won't even mention the terrible load that Klipsch in parallel presents to your amplifier, nor the distortion. I would suggest to you, that the amp goes into thermal overload. Trying turning it down by 20-30db, and see if it stays on-line. It can be fixed, if turning it down doesn't help, it can be repaired, but not inexpensively.

Nov 27, 2014 | Technics Audio Players & Recorders

1 Answer

Heatsink


INSIDE A COMPUTER OR THE HEAT SINK FOR YOUR COMPAQ COMPUTER?

The "CPU" or central processing unit, otherwise known simply as "the processor," is the primary "brain" of the computer. Processors are very finely engineered components that are not repairable. But replacing a failed processor is an option for the owner of any model Compaq Presario desktop computer. Just check with HP/Compaq for the correct and speed of processor for your motherboard before purchasing a replacement.

Turn off the computer and disconnect all cables. WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Remove the cover. Lay the computer down flat. If there is a plastic hood covering an exhaust fan, remove it by pressing in on the indicated release tabs. Examine the processor assembly. The processor is a square chip that is covered by a metal heat sink with fins. A fan will often be mounted on top of the heat sink; unplug its connection to the motherboard. Two clips usually secure the heat sink assembly to the top of the processor. Gently press down and slightly away on the flat end of a clip to release it. Avoid using a screwdriver to release a clip; a slip could scratch the motherboard. Release the clips and gently remove the assembly. The heat sink should separate, leaving the processor behind in the chip holder. Clean the bottom of the heat sink. Use a paper towel and a dab of solvent cleaner to remove the old thermal paste. Set the clean heat sink aside. Lift up the lever to unlock the old processor and remove it from the pin mount. Insert the new processor chip. Align the pins on the processor to the "cut off corner" or dot on the pin mount. The processor should drop into the pin holes easily. If the processor won't drop in easily, check the pin alignment. Once the processor is inserted correctly, pull down the lever to lock in the chip. Apply thermal paste to the bottom of the heat sink. Apply enough paste to cover the area of the small gray rectangle on top of the processor. Apply the paste with a spreader made from a piece of flexible plastic. Spread the paste evenly to a thickness of two sheets of paper. Check the heat sink mounting alignment and lower the heat sink onto the top of the processor. Reinstall the mounting clips. Reattach the heat sink fan to the motherboard if necessary. Plug in the computer and monitor and boot. If the machine won't boot or it emits warning "beeps," unplug the power and monitor, and troubleshoot your work until the computer boots successfully. Shut down again and replace the exhaust fan hood. Close up the computer and reboot. Hope this helps.

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=thermal+paste

Jan 19, 2013 | HP Compaq Presario SR5610F Desktop PC

1 Answer

Bad processor on my hp compaq


WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.

http://www.kitchentablecomputers.com/static.php - rules


The "CPU" or central processing unit, otherwise known simply as "the processor," is the primary "brain" of the computer.

Processors are very finely engineered components that are not repairable.


But replacing a failed processor is an option for the owner of any model Compaq Presario desktop computer.


Just check with HP/Compaq for the correct size and speed of processor for your motherboard before purchasing a replacement.


Turn off the computer and disconnect all cables.

Remove the cover.

Lay the computer down flat.


If there is a plastic hood covering an exhaust fan, remove it by pressing in on the indicated release tabs.


Examine the processor assembly.

The processor is a square chip that is covered by a metal heat sink with fins.

A fan will often be mounted on top of the heat sink; unplug its connection to the motherboard.


Two clips usually secure the heat sink assembly to the top of the processor.

Gently press down and slightly away on the flat end of a clip to release it.


Avoid using a screwdriver to release a clip a slip could scratch the motherboard.

Release the clips and gently remove the assembly.


The heat sink should separate, leaving the processor behind in the chip holder.

Clean the bottom of the heat sink.


Use a paper towel and a dab of solvent cleaner to remove the old thermal paste.

Set the clean heat sink aside.


Lift up the lever to unlock the old processor and remove it from the pin mount.

Insert the new processor chip.


Align the pins on the processor to the "cut off corner" or dot on the pin mount.

The processor should drop into the pin holes easily.


If the processor won't drop in easily, check the pin alignment.

Once the processor is inserted correctly, pull down the lever to lock in the chip.


Apply thermal paste to the bottom of the heat sink.

Apply enough paste to cover the area of the small gray rectangle on top of the processor.


Apply the paste with a spreader made from a piece of flexible plastic.

Spread the paste evenly to a thickness of two sheets of paper.


Check the heat sink mounting alignment and lower the heat sink onto the top of the processor.

Reinstall the mounting clips.


Reattach the heat sink fan to the motherboard if necessary.

Plug in the computer and monitor and boot.


If the machine won't boot or it emits warning "beeps," unplug the power and monitor, and troubleshoot your work until the computer boots successfully.


Shut down again and replace the exhaust fan hood.

Close up the computer and reboot.


http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490



Hope this helps

Nov 11, 2012 | HP Compaq dc5100 Microtower PC Desktop

1 Answer

Cpu fain over temperature plz ans me i wait your ans


Usually an overheating CPU is a result of bad or insufficient CPU grease.

If it is a desktop:
- Unplug
- Remove case cover
- Replug, BRIEFLY turn on to make sure CPU FAN is working properly
- IF FAN DOESN'T WORK:
- Replace fan!
- IF FAN DOES WORK:
- Unplug fan power cord
- Remove heat sink and clean with compressed air
- Carefully remove CPU from socket after releasing it via hinge mechanism
- Using rubbing alcohol and cotton or lint free cloth, clean cpu and bottom of heat sink of old grease
- TO APPLY NEW GREASE (purchase from anywhere):
- USE SMALL AMOUNTS! One of the big mistakes with applying is the tendency to put too much
- I'd suggest 3 to 4 dabs, no more than 3 to 4 millimeters in diameter
- Replace heat sink
- Use a program such as CPUID HWmonitor (freeware) to monitor temperature. It should hover in the 60 centigrade. If constantly above 74 then you may need to reapply grease.

If it is a laptop:

You can use most of the steps above but getting to the heat-sink will be tricky as the proprietary design of every make and model makes it difficult to access internal parts. I'd suggest taking it in!

Jul 05, 2011 | Computers & Internet

1 Answer

Sony vaio vgn-cr510e overheating and sutting down time to time what seems to be problem


Either the cooling fan is not functioning properly or not functioning at all, or the heat sink's vents are blocked by dust & need to be cleared.
Another possibility could be that the thermal grease applied to the top surface of the CPU and/or the graphics chip has dried out & needs to be cleaned & new fresh thermal grease applied.

Jan 08, 2011 | Sony VAIO VGN-CR510E/L Laptop

1 Answer

My Gateway MA7 (MT6223b) laptop is overheating, and internet freezes. have replaced main fan, but only worked for a short while - any suggestions most welcome


You might need to re-apply some thermal grease onto the CPU's & chipset's surface beneath the heat sink. You might also need to clean the heat sink's vents.

Oct 14, 2010 | Gateway Computers & Internet

2 Answers

3 of 4 rings were red, now no lights at all


ok the three red rings was lit to notify you that your board, cpu and gpu have experienced a significant source of heat. So much in fact you really should bring it to a repair shop. I see these at least 4-5 times a day your 360 needs to be disassembled and the heat sinks removed this will allow you access to the cpu and gpu both sides of the board need to be heated with a equal amount of heat to heat up the solder and reseat both chips.

Mar 29, 2010 | Microsoft Xbox 360 Console

2 Answers

The bracket clip that holds the fan down broke. Is there a fix or do I buy a new fan?


If you are innovative enough one can improvise by simply hold the fan to the heat sink with copper wire in case only one bracket is broken. The fan only requires to be on the heat sink to remove heat from the processor. Otherwise the fan & heat sink as one sealed unit only. Else try out the junk yard and see if you can hunt for one where PC's are dumped !

However if you want your PC to last for 2-3 yrs more, trouble-free, then my recommendation would be to replace the fan+heat sink unit, 'cos if the heat conducting paste between the processor & heat sink, if disturbed cannot be replaced to its original capacity & the processor will overheat and the PC will auto shut down repeatedly, till the processor is damaged permanently! .............................sodeep

Nov 12, 2009 | Foxconn CPU Cooler Fan CPU Fan

1 Answer

How to replace convergence ICs in samsung


You will need:
  1. Convergence ICs.
  2. Heat sink grease or thermal compound.
  3. Soldering iron.
  4. Solder lead.
  5. Digital multimeter.
  6. Solder pump.
  7. Small side cutter.
Steps:
  1. Unplug the unit from the AC outlet.
  2. Remove the screws and take the back panel off the TV. The convergence ICs are located behind a large heat sink.
  3. Remove the board that the ICs are on.
  4. Check all the big resistors on the board using the digital multimeter. Some resistors are connected in parallel so they read half of their nominal resistance.
  5. Check the board for cracked solders and tracks.
  6. Cut all the legs of the ICs and unscrew them from the heat sink to take them out.
  7. Remove all the legs by applying soldering iron on one side and pulling on the other side.
  8. Clean the holes for the new ICs with the soldering iron and solder pump.
  9. Clean the heat sink from the old thermal compound or grease and apply the new one to the ICs.
  10. Fit the new ICs legs on the holes and screw them to the heat sink. Wipe excessive grease. Make sure they are making good contact with the heat sink.
  11. Cut excessive length of legs. Leave about 2mm and solder it in.
  12. Clean solder points with lacquer thinner or even alcohol.
  13. Make sure no solder is going to two legs at the same time.
  14. Put all back together.
  15. You may need to readjust the convergence on the menu.

Oct 24, 2009 | Samsung HCN653W 65" Rear Projection...

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