Memorex MLT3221 no power

[budm]

Re: Memorex MLT3221 no power

Since we are looking for short, set the meter to Ohm mode 200 Ohm range, the use the probes on each legs of the Diode, take the reading, then reverse the probes and take the reading.
Tell us what you get.

[CR Designs]

Re: Memorex MLT3221 no power

Check with power on or off

[budm]

Re: Memorex MLT3221 no power

You will alwasy do this when you do any Diodes, transistors, capacitors, transformers, looking for shorts, you need to unplugged the unit from the outlet, and let the caps discharge for at least 5 minutes, especially that big cap.
You will have it plugged in when you need to test the voltages.

[CR Designs]

Re: Memorex MLT3221 no power

Both legs read 00.6

[budm]

Re: Memorex MLT3221 no power

00.6 Ohms? 00.6 K Ohms? If it is 00.6 Ohms then you need to pull it out as shown in your picture and measure it again off the board.

[CR Designs]

Re: Memorex MLT3221 no power

I set the meter to 200 ohms. up above the dial there is 2000k and 200k. so i think i was at just 200 ohms. how what do I still pull the part and check it again?

[budm]

Re: Memorex MLT3221 no power

OK, if you're on 200 Ohm scale and the reading shows 00.6 Ohms on both directions, then verify it out off the board to be sure. You may have the same failure as shown in other thread.

[CR Designs]

Re: Memorex MLT3221 no power

O.k i will put the part. Your help has been great !! I will let you know what it reads when I get it out

[budm]

Re: Memorex MLT3221 no power

I hope it is that simple, then it will be easy repair job for you.

[tom66]

Re: Memorex MLT3221 no power

If there is a history of the component failing you could get lucky.
These are really poorly made power supplies. Looks like Memorex/Imation chose the lowest bidden when choosing OEM for their TV.

[CR Designs]

Re: Memorex MLT3221 no power

I pulled the part got the same reading on both legs 00.6

[tom66]

Re: Memorex MLT3221 no power

What is part # of device?
It is dead short so you have found the fault.

[CR Designs]

Re: Memorex MLT3221 no power

Part number is Her30

[tom66]

Re: Memorex MLT3221 no power

Is it not HER304 as in the other thread? This should be a suitable replacement if it is HER304.
http://www.digikey.com/product-detai...SCT-ND/3191623

[CR Designs]

Re: Memorex MLT3221 no power

The part is Her303,can I use the hero4 part? Also where can I find this part

[CR Designs]

Re: Memorex MLT3221 no power

I see I put the wrong replacement part number I guess it should Her304

[tom66]

Re: Memorex MLT3221 no power

Yes you can use that part for HER303 or HER304. Basically the breakdown voltage needs to be the same or higher, and the current should be the same or higher, and it must be a fast recovery type.

[CR Designs]

Re: Memorex MLT3221 no power

Where can I find this part?

[tom66]

Re: Memorex MLT3221 no power

I just linked it to you.
http://www.digikey.com/product-detai...SCT-ND/3191623

You can buy direct from Digikey. $3 or so shipping charge.

[CR Designs]

Re: Memorex MLT3221 no power

I went to the website entered the part number, they have some listed but I don't know which one to buy, can you take a look and tell me what part number to buy,Thanks