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MLT668T-L1 rev.A power board    
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marco.brusca



Joined: 02 Nov 2017
Posts: 8
PostPosted: Thu Nov 02, 2017 12:07 pm    Post subject: MLT668T-L1 rev.A power board Reply with quote
Hi folks, I'm new here and desperate Mr. Green
I have been looking for information on the MLT668T-L1 rev.A power board that is in my 32 " LCD TV.
Anyone got the schematic? I need to know the value of a couple of resistor that blew up.
Help anyone? Mr. Green
thanks
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JTS1957



Joined: 21 Jan 2009
Posts: 2393
Location: Far, Far Away
PostPosted: Thu Nov 02, 2017 8:09 pm    Post subject: Reply with quote
I found this. Don't know how close they may be to yours.
Resistors, like fuses, don't usually 'blow up' for no reason.

https://elektrotanya.com/megmeet_mlt668_rev.1.5_power_supply_sch.pdf/download.html
http://www.shopjimmy.com/megmeet-mlt668tl-power-supply-unit-1.htm#
marco.brusca



Joined: 02 Nov 2017
Posts: 8
PostPosted: Fri Nov 03, 2017 1:13 am    Post subject: Reply with quote
Hi, yes they blow up for a reason and I know that reason I was there when my cat passed near the back of the TV left open for testing. It was a matter of a split of a second and....boom-bim-bang ( nothing that dramatic fortunately ) Mr. Green
All good at the end, no injuried but the TV and precisely 5 resistors on which the marking went off and are unreadable.
BTW I had already this
https://elektrotanya.com/megmeet_mlt668_rev.1.5_power_supply_sch.pdf/download.html
doesn't help and I get "access denied" to
http://www.shopjimmy.com/megmeet-mlt668tl-power-supply-unit-1.htm#
any other link or suggestion?
Thanks
JTS1957



Joined: 21 Jan 2009
Posts: 2393
Location: Far, Far Away
PostPosted: Fri Nov 03, 2017 2:26 am    Post subject: Reply with quote
Are these resistors on the top or back of the board?
There doesn't appear to be much in regards to resistors in the TOP view of Shop Jimmy board, unless a heat sink is blocking my view.
The BACK view shows MANY surface mount resistors with well-labeled location numbers and can make out some part values.
https://imgur.com/a/1jywE
marco.brusca



Joined: 02 Nov 2017
Posts: 8
PostPosted: Fri Nov 03, 2017 2:48 am    Post subject: Reply with quote
They are on the back, smd. I can still see the part number on the board but not the value since it is on the resistors .
There's nothing on that link.
https://photos.app.goo.gl/wuHcujQyV65xN2U43[/url]
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marco.brusca



Joined: 02 Nov 2017
Posts: 8
PostPosted: Fri Nov 03, 2017 2:49 am    Post subject: Reply with quote
https://photos.app.goo.gl/wuHcujQyV65xN2U43
JTS1957



Joined: 21 Jan 2009
Posts: 2393
Location: Far, Far Away
PostPosted: Fri Nov 03, 2017 2:52 am    Post subject: Reply with quote
If you give part location numbers ... I'll see if I can make out.

Last edited by JTS1957 on Fri Nov 03, 2017 3:10 am; edited 1 time in total
JTS1957



Joined: 21 Jan 2009
Posts: 2393
Location: Far, Far Away
PostPosted: Fri Nov 03, 2017 3:03 am    Post subject: Reply with quote
Got it.

They appear to match the resistors shown at those locations on tanya schematic.

R64 / 60 / 58 / 55 / 53
marco.brusca



Joined: 02 Nov 2017
Posts: 8
PostPosted: Fri Nov 03, 2017 6:30 am    Post subject: Reply with quote
OK, let me have a look....
marco.brusca



Joined: 02 Nov 2017
Posts: 8
PostPosted: Fri Nov 03, 2017 6:59 am    Post subject: Reply with quote
Yep, there they are!!Hopefully they didn't change from rev.A.
Thank you very much JTS1957, I'll replace them and let you know Laughing
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