Megmeet MLT668TL-V rev 1.1 Help please.

[dabone]

I did a whoops while working on some tvs this weekend.

I had a working MLT668TL-V rev 1.1 supply testing a couple of tvs, and while testing I sat the board down on the back of a panel before the main cap discharged, resulting in a large pop. (The board wasn't plugged into anything at this point.)

Now the standby power is cycling every second or so.
Any clues on where to start?


Thanks.

Later,
dabone

[dabone]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

It's very close to the 1.5 Circuit, I can't find a 1.1 schematic.


http://www.svfdtn.com/mtx/megmeet_ml...supply_sch.pdf

Thanks.

[err500]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

Prosacn 26" tv with Megmeet MLT668TL-V rev 1.1

Will upload my fix/repair soon

I replaced 2 1000uf 10v an 2 470uf 35v it's been working

[budm]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

You should also replace those small lytics caps (startup/running caps) in the primary too at the same time.

[err500]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

This what worked for me Hope it Helps someone out there

[razirafi]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

Hello to all, I know this is an old thread but I would like to ask for help from you guys. I have the same power supply unit that I am in the process of repairing. I need to know the value of these burnt resistors R55, R58, and R60. I have attached photos of the PS board.

[llonen]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

I am fairly certain I have one of these boards in spares, when I get back to the workshop later today I will look these values up for you

[razirafi]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

I am fairly certain I have one of these boards in spares, when I get back to the workshop later today I will look these values up for you

Thank you. I look forward to it and be able to restore this PS board to working condition once again.

[llonen]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

Here are the values as requested

R55 : 200
R58 : 4R7
R60 : 4R7

Hope this helps

Regards

[razirafi]

Re: Megmeet MLT668TL-V rev 1.1 Help please.

Here are the values as requested

R55 : 200
R58 : 4R7
R60 : 4R7

Hope this helps

Regards

Thank you so much. Your effort and time to check this out for me is highly appreciated. I have found a schematic for a revision 1.5 board so I would like to share it here for everyone.