Re: Hyundai HLT-3210 POWER SUPPLY FAULT LOW OUTPUT FROM...
Hello! My name is Ivica,and I am from Croatia.I have same LCD which have problem with motherboard.Try to disconect power supply from inverters and then measure all volt line.Maybe failure is on inverters board!Write me if you solve the problem,and maybe you know where can I find new motherboard for my LCD.Thanks.
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It either works with the tubes or does not. It sees 24 volts in. If the power supply board can deliver that voltage, the tubes should light. If they do not, look for bulging electrolytic capacitors, or those with hardened black ooze coming out of the top. Those are usually the first point of failure on the set.
If you absolutely want to try static test the inverter board, 24 volts DC in at about 6 Amps (and the tubes load the circuit to keep it functioning), but a high impedance DMM should read anywhere between 750 to 2000 volts AC open circuit, or potentially 100 to 200 voltsAC with lamps in place depending on how many hours are on them.
Where the power comes onto that board, there may be some SMD fuses, they would likely be in the 8 to 10 ampere range and only marked "8A" or "10A". These can be checked with meter.
The transistors MOSFET's or Bipolar types are difficult to test in circuit because the inductance is low enough in the inverter transformers to show a false failure. The same with the rectifiers.
They did use a silver bearing solder with a higher melting point. If there is a problem with the 24 volt supply and no bulging caps evident, suspect bad solder joints. Reflowing the solder will usually correct that issue.
If the set acts like it is trying to power up and shuts down- the tubes likely need replacing and not the ballast/inverter.
I had the same issue. Some other sites suggested the Inverter PCB could be faulty but I couldn't see anything obviously wrong with it. However, I did notice that there was only 19V coming in on the 24V supply to it. The 24V is supplied from the Power Supply PCB (the one where the mains supply comes in to). So the solution was to replace 2 x 680uF capacitors on the power supply board, located near the 24V output connector to the Inverter PCB. Visually, these two capacitors appeared to be 'bulging' which is a good indication that they are faulty.
The problem is the power supply it has a defective capacitor try to replace all the capacitor in the power supply, or try to look for buldge up capacitor or leaky capacitor. Because this defective capacitor will cause a low and unfiltered dc output. the tv is receiving current but cannot transfer current to other parts of your tv. Good day and best regards.
This set is very common for open capacitors in the power supply. Likely your 5 volts and 12 volts from power supply to sound board are bad. More likely many more capacitors in the power supply are also bad. The common ones are 3300 uf 2 10 volts. all on the power supply board. Usually 9 or 10 of them.
I believe this unit has an external power supply (black box) attached to the cord.And it may. This is the first place to trouble shoot. This external power supply has a weak capacitor inside. When this happens, the voltage is low and the current is low. If you can test the the voltage (which will be DC) on the output of this power supply, do so.Any reading less than 12 volts indicates this is a weak power supply. Open this black box, and you may see a capacitor with a bulged top. Replace this cap with the same voltage and MFs. Good luck and thanks for asking and show a few hands of support.
at error code is 12 and it is your 12-volt supply. Measure from the inverter to the power supply for 24 volts pins 1,2 and 3. If you don't have the 24 volts disconnect the inverters from the power supply and see if the volts come up. If the 24 volts come up replace the inverters. If the 24 volts are still not there replace the power supply. The volts have to be steady and not going up and down if they are replace the power supply. But if the 24 volts are there with the inverters connected 1M03 pin 3 for 3.2 volts. If the 3.2 volts are not there replace the small signal board. The only way to get a manual is to find it on line or call the manufacture.
The inverter card drives your cold cathode lighting. If you pull the covers you will find all the lights out, if any of the eight legs of the inverter go out (driver transistor) the card will not work.