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I think I need a new power supply, what voltage should I get?

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Element elefw408 not powering up do you think its the main board


TV Parts Universal TV Stands DLP Chips ShopJimmy If there are DC voltages no longer present on the power supply board, these guys can either repair your board or supply you with a new one.

May 05, 2017 | Element Televison & Video

1 Answer

I have Jamo E8sub need to be fixed. The power LED is not on, it was RED at one time (Did not turned Green), but not anymore. I checked the DC voltage on main IC (LM3886) no power on Pin # 1 and 5. Both...


hi,
the ic lm3886 should have voltage at its pin 1 and 5 , because it is the vdd supply pin of that ic. trace out, to where the track goes from pin 1and 5. it should go to the power supply or to any switching circuit. may be problem with its power supply side . any one of the voltage is missing. check the voltage regulators if there. check the power supply side i think complaint lies there. no need to replace the main board . from ur narration i think u have knowledge in electronics. make one more try to solve the problem.
ok

Dec 30, 2010 | Jamo E8 SUB Subwoofer

2 Answers

Power supply HP-A3108F3P Line rectified voltage is good, 310 V. No output voltages, no voltage on UC3843, no oscillation. Switching Mosfet is ok. Need help, thanks.


That could be a problem on secondary side. Shorted rectifier diode.

Please do check start up resistor of uc3843, I think its on pin 7 with 110Kohms or 56Kohms value for 220VAC or 110VAC supply input respectively. Open or change value, it is a fusible resistor. If open do check other components for defects. Don't substitute a common resistor on this one. Datasheet could help you alot.

A word of warning, the voltage may bite and enough to kill. So take necessary precaution, if in doubt let the tech handle it. Or buy a new one.

Oct 18, 2010 | IBM HPA3108F3P 310Watt Power Supply

1 Answer

Switching power supply ??


For your purposes there is no difference: all you need to know is the voltage your WD drive requires, and the maximum current load it needs. Any regulated DC power supply with that voltage and *at least* that current will do.

Not-so-technically, a "regular" power supply will supply power at the correct voltage by "discarding" a portion of the extra potential. A "switching" power supply will shunt and switch the extra power away, so that instead of being "lost", it is "not requested" from the uplink grid. In theory a perfect switching supply will have no losses, and therefore dissipate no waste heat (in practice there will be some losses, and cooling will be needed). The important thing, though, is that a switching power supply can deliver twice as much power as a "normal" supply, and the same power in a half as big package.

Jan 03, 2010 | Computers & Internet

1 Answer

Flashing picture


I had the same problem with my 237V, I had to replace the power supply to fix the problem. I believe when it would work the output voltage of the power supply was around 19.2v. When the screen started to strobe the voltage had jumped up to 21.5V. A new power supply fixed it for me but now I think my main board is on the fritz.

Sep 09, 2009 | Olevia LT37HVS 37 in. LCD HDTV

1 Answer

Power supply problems


Have ordered a new power supply PCB as too many parts need replacement. Best to buy the whole lot.
Ventilation seems to be an issue with this unit, I am thinking of installing a small fan at the back to cool the voltage regulator and main transformer.
Thanks.

Jul 07, 2009 | Televison & Video

1 Answer

Power supply or motherboard?


your motherboard BIOS is corrupted you need to replace it...

Mar 10, 2009 | MSI 865PE Neo2-V Motherboard

2 Answers

37" broke - need help


hi..the reason to this problem is your
power supply might have got failed.
check whether any power is coming
from the supply.This might be the
problem in your tv.
check it out..
thank u..
rate me..

Feb 11, 2009 | Olevia LT37HVS 37 in. LCD HDTV

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