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BACK POWER SUPPLY HI 1000V smps not work

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How do the DC filter caps tested out to be? any leaking/bulging tops or have high ESR?
Need to verify that the 12vdc is fedding the inverter circuits first.

Basic LCD monitor troubleshooting guide:

Failed TV and Monitors:
Capacitors kit: he can make you a set of caps for you.
Please post back what you find.

Posted on Oct 02, 2010


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Smps colour

Okay; first off an SMPS is any number of power supplies used for electronics. So this is a very vague question. In a computer power supply to an IBM or PowerPC based motherboard (the later is now obsolete and no longer in use for most new computers) there is no one power supply "wire". Most video cards are powered via PCI port through the motherboard power supply connection.

Some very high power high end video cards and some SLI/Bridged cards require their own power source and this is usually a 12 volt rail much like the ones used for SATA power supply.

In a monitor, each make and model can be different depending on who supplied the power supply. The internal power cords can come in different colors. Though the standards are black white blue and green and red. Most displays don't use colored cords for connecting to the main board of the display. They use a 8 or 10 pin ribbon. Most of the colored wires are linking the main inducer to the LED back light.

If we're talking about the internal workings of an SMPS (Switch Mode Power Supply) there is no "display" wire. SMPS internal wiring is all about controlling and routing power to the different rails (that is the different power connectors). Never open an SMPS case, especially if it's plugged in. Switch-mode power supplies have capacitors that can provide a rather nasty charge, and several inducers that can hold a charge well after the power supply has been unplugged. Never service an SMPS on your own, always seek a professional when attempting to fix an SMPS. Though, for the most part, fixing a burnt out power supply is a waste of time, it'd be best just to buy a new one and recycle the dead one.

Oct 11, 2013 | Computers & Internet

1 Answer

How to test this old dell smps,

take jump clip / a metal wire. Take the SMPS 20/24 pin connector. connect one end of the wire to black and other end to green. power the SMPS. If it is working its ok. otherwise SMPS having problem

thanks & regards
Anas K A

Jul 04, 2011 | Dell Power Supply for SMP-2450 (330 W,...

1 Answer

Tv flickers off and on

You have to check the back light inverter of your lcd tv. In all lcd tvs there are back lights to illuminate the pixels. There are two types of back lighting in use . CCFL ( cold cathode fluorescent lamp) and LED (light emitting diode). In you your tv it will be CCFL. If it is CCFL then it need an inverter (voltage step up circuit) for getting its working voltages. Normally it will produce above 1000V in low current. In the inverter circuit there will be inverter transformers. If the winding of the transformer get shorted then the inverter will drain a high current from the power supply. If so then the current sensing circuit senses the same and it will shut down the power supply. That's why it do the cycle ON an OFF repeatedly.
Just check the inverter board. Normally there will be three circuit boards in LCD TV. Mother board, SMPS (switch mode power supply) and inverter board. In some tvs the SMPS and inverter bord will com-pained as one board. you have to check the inverter transformers. there will be 4 or 6 inverter transformers. if available replace the inverter board as a whole.
Also check the electrolytic capacitors in the power supply. if any of the capacitor seems like one that in the picture, then replace the same and then only go for the inverter board

ajin_g_8.jpg ok

May 29, 2011 | LG 42LC2D 42 in. LCD HDTV

2 Answers

When I try to charge the battery in my Cardioline delta 1 Plus machine, it says "supply failure" and it also will not run on outlet power.

You have to check the power supply of you machine. Normally it will be a SMPS (Switch Mode Power Supply). If the SMPS is faulty then the machine will not work on outlet power and also will not charge the battery. That's why it displays supply failure. Check the SMPS if available then replace the same. For repairing the same can only done by an experience person in electronics. Because there are high voltage areas in the SMPS. So if you need to repair the same consult some one who is experienced in it.

Apr 26, 2011 | Medical

1 Answer

Ive had this bluray player for 2 years and it was working fine, then one day i tried to turn it on and nothing happened. i checked if the fuse was blown but i appears to be fine. so there is no power...

there is possibility of two complaints.
1, The SMPS power supply fault
2. the mother board fault.
if the SMPS is faulty the you can rectify the problem. If it is with the mother board the you have to contact the manufacturer .
First of all you have to check the SMPS ( switch mode power supply). you have to check the voltages at it secondary stage. 5v, 12v, etc
switched-mode power supply (switching-mode power supply, SMPS, or simply switcher) is an electronic power supply that incorporates a switching regulator in order to be highly efficient in the conversion of electrical power. Like other types of power supplies, an SMPS transfers power from a source like the electrical power grid to a load (e.g., a personal computer) while converting voltage and current characteristics. An SMPS is usually employed to efficiently provide a regulated output voltage, typically at a level different from the input voltage
for checkin the SMPS voltaes you need a multimeter. And check the voltages at it secondary stage
Added the inside view of BD 1600

if there is no outputs from the smps then you have to replace the SMPS drive STR ic near the big capacitor. Also ty to replace the OPTO coupler ic. y have to check the all resistors near the ic.

Remember one important thing that the capacitor can hold charge for some time even if you disconnect the power. so after removing the power. remove the SMPS very carefully. discharged the capacitor using a bulb.
i have also added a video for SMPS working for you reference will hep you for repairing your one


Apr 07, 2011 | Samsung BD-P1600 Blu-ray Disc Player

2 Answers

The problem is power out put voltage diodes are completely burned I not getting the value of the diodes The voltages are 72v 50v 6.3v 13v -12v These are out put voltages .so please sending me...

  1. Diode: UF4007, 1000V 1Ampere ; for 72V
  2. Diode: GUR460L, 600V, 4Ampere : for 50V
  3. Diode: UF5404,400V, 3Ampere: for 6.3V
  4. Diode: UF1G, 400V, 1.2Ampere: for 13V
  5. Diode: TVR10G, 400V, 1Ampere: for -12V

Nov 12, 2010 | SAMTRON 55V 15" CRT Monitor

1 Answer

Output comes on when powered on but turns off immediately

First remove rams and reinsert.

its the problem with your smps. Check with some other smps to your system otherwise use this smps to connect to some other system. If that system working fine with this smps. then may be there is some problem in your motherboard.

Jun 25, 2010 | Acer (56.04200.H22) (5604200H22) 200-Watt...

1 Answer

Sometimes work and sometimes doesnt work

Hi , The SMPS Fan needs to be replaced as due to overheating the SMPS sometimes does not switch ON .

Dec 30, 2009 | Dell (HP-L161NF3P) (HP-L161NF3P) 160-Watt...

4 Answers

I have acer extensa 5630ez. turned it off on wednesday and it wont trun back on.

Is it getting any power to the pc? Are any lighs coming on or anything? If not, your power supply will need to be replaced

Aug 07, 2009 | E-Machines eMachines Desktop PC

1 Answer

Hyundai imagequest Q17 montior problem

ontherhodes5, Your monitor will probably need servicing for one or both power supplys in the unit. Yes, If you can get a new oem Switch-mode-power-supply/inverter board you might get it working. I suspect that it (smps) can't supply the voltages needed by the logic-interface board- therefore no digital data can be processed for display on the screen, which should be white-bright but now only gray. (dim) because the 1000v ac from inverter circuit is also missing 10to40% of it's output. Your best bet will be to find out if Hundai can do a repair/swapout. You send yours+$40 to $90 and they send you a Refurbished same model with new CCF tubes, Inverter board, smps board. It seems that sooner or later these lcd ccf (cold cathode fluorescent tube backlights) will need servicing. Don't feel bad about this monitor. There are about, (guess only) 2500 more of all makes and models with similar power supply problems out there. To see whats inside a lcd search YOUTUBE for vids of servicing or repair of lcd screens or similar.. also www ??? or or visit run by a Jestine Yong. Ignore the sales pitch and just look fyi. hope this was of some help. drop me a note if possible. I'm louie12fix on fixya or lmistyrel@ BYE

Mar 29, 2009 | Hyundai ImageQuest Q15 15.1" Flat Panel...

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