Question about Akai LCT3201AD 32 in. LCD Television

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Need a description and location of or a schematic for Megmeet MLT198K. Optionally a new power supply. I have not been able to get a response from AKAI. This blew EC10 (1000uf/16v) an electrolytic which I already replaced. Thank you for any assistance with this matter, Larry L.

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There are 2 1000uf/16v caps that blow on the board. The second one is under the heat sink nearest the one that is easily seen on the board. You might also have to replace the 220uf/25v caps under the heat sink as well.

Posted on Dec 04, 2009

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Hello i need schematic diagram for power supply Model MEGMEET - ML686 . that power supply used for LCD TV .it's bad Brand and nobody care in service center. hope somebody help


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Check the present power supply [SMPS]; and find out the number of switching regulator IC used. Surf the site with that IC number. You will get similar circuit for SMPS there.

May 04, 2015 | Televison & Video

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Akai 32" wide-screen lcd tv/dvd


Tramaine, I would suggest a new PSU. I have used ShopJimmy.com in the past with great success. Here is a link to the part you need on their site. Hope that helps! TeeVeeMan2
http://www.shopjimmy.com/megmeet-mlt168a-power-supply-unit.htm

Aug 18, 2011 | Akai LCT3201AD 32 in. LCD Television

1 Answer

Power supply out of system does not power up. is it dead?


No, your power supply is not necessarily dead. Power supplies require a "power good" signal back from the motherboard before they will turn on. In order to test a power supply that has been removed from the computer, you need a PV power supply tester. Without one, you will either have to take you power supply to a PC technician and have him test it or install a known good power supply in your computer.

If you have any additional questions contact me by clicking on the "Add a comment" link located under your problem description on FixYa. Also, if you believe that this information was helpful to you, please return to the FixYa website and rate my response to your question.
Best regards,
Yavacotech

Jan 05, 2011 | Bestec Computers & Internet

1 Answer

I HAVE A MEGMEET MCL386X CHANGED 3 CAPS ON SECONDARY SIDE ,NO LUCK .NEED SCHEMATIC OR INFORMATION ABOUT TRUBLESHOOTING OOWER SUPPLY THANKS


Sch. is hard to get for this brand. Is it similar to this one? http://s807.photobucket.com/albums/yy352/budm/MEGMEET%20MLT198A%20REV1_4C/

I google MCL386X and not much comes up, it may have more numbers on the board.
Are you at least getting the 5vdc standby? You must have this standby voltage for anything else to work.
Send me good clear pictures, budmrtn@aol.com to see what I can do for you.

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c rating such as PANASONIC FM or FC series.
Please post back what you find.

Dec 01, 2010 | Televison & Video

1 Answer

Tv shuts off when you turn it on again it will play a minute


I think this might be bad/swollen capacitors in your power supply, or something odd in the +5VDC circuits of the power supply, but I am posting all of the things I have found so far with these TVs.

Here are few possible solutions:
If you have no red light and you have a Megmeet MLT386 power supply, check these parts:
1) Swollen caps on the PS secondary circuit (may cause the red light blink or shutdown problems).
2) Blown fuse F1 (5A/250V) this is caused by a shorted FET at QA1 (20N60), you may also find that SMT cap CX23 is burned up (.001uf) which is in parallel with diode DA2 which may be damaged/shorted, replace these components.
If the power LED goes from red to green when powered up but no picture, then it might be lost +24VDC from the power supply:
3)Check fuse F2 (3.15A/250V, I put a 5A in), if it is blown, replace FET at QA2A (9N50C), replace QA2 as well (9N50C). Check SMT resistors at R233,R234,R235,R236 (.47 ohm). If open, replace with .1 ohm 1W or 2W resistor (easier to source). Also replace SMT transistor QF1 (2X4 or 2N4401 NPN transistor). And replace diodes at DS2 and DS1 (HER207), DS2 was shorted, DS1 was ok but I replaced it anyway.

I dont know as much about the Megmeet MLT169A, but it has similar problems and similar components.
4) I had to replace all of the capacitors in the secondary circuit (there are six in a 3x3 row marked EC9 (1000uf35V),EC10(1000uf35V),EC14(470uf35V) and EC18,EC19,EC20 (all 1000uf35V).

OK for the Megmeet MLT169A with red flashing LED when turned on we found that IC7 was bad. This is an SMT component on the solder side of the power supply. It is a 4407P (P channel 30V MOSFET). For testing purposes, we jumped across it to feed +5V to the TV permenently instead of allowing +5V to go into standby.

Sep 09, 2009 | Akai LCT3201TD 32 in. LCD Television

2 Answers

Rca 42 in lcd it shuts off 5 sec after being turned on


This could be a power supply problem, these tv's use a series of switching mode power supplies usually mounted in the same circuit board , the light flashing is an indicator that this is the problem, but these boards are expensive so you may want to get the tv looked at before anything else. You do not mention if the sound remains in your description of the symptom, but just in case it does then a back light inverter could be at fault. hope this helps. thanks for leaving you feed back.

Aug 27, 2009 | RCA L42WD22 42 in. LCD Television

1 Answer

MEGMEET power supply. part no. MLT386X


I HAVE PROBLEM TO GET THIS POER SUPPLY TO BUY WHERE I CAN GET IT PLEASE

Dec 09, 2008 | Televison & Video

2 Answers

Akai TV with Megmeet power supply


Hi artoo
if you want you can fix the power supply. i know service tech who fixed my tv power supply. His email is jah2mil@hotmail.com.

Apr 10, 2008 | Akai LCT3201AD 32 in. LCD Television

4 Answers

Red light still flashing


you also have to replace the 2 resistor on bottom of the board they are 10 ohms each they are surface mount 1/4 quarter watt each they are next to z3, also have to replace the 3 caps. I have fixed 4 units with the same problem this must be obviously a design issue since many of these tvs have the same problem.
hope this helps

Feb 16, 2008 | Akai LCT2701TD Television

2 Answers

It wont power on


THANKS jaime867 for fixing my tv power supply.

Feb 15, 2008 | Akai LCT3201AD 32 in. LCD Television

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