VIZO VX32l HDTV10A

[tom66]

Re: VIZO VX32l HDTV10A

We need some of the bottom of the board (green side)

[geep]

Re: VIZO VX32l HDTV10A

and a few more

[budm]

Re: VIZO VX32l HDTV10A

Can you take straight shot of the bottom side instead of in an angle? Take the pictures of the whole bottom board, then four 1/4 section so I can easily see the traces on the board. Same thing for the top side of the board. I have to see it clearly to be able to trace the connections and read the component designators clearly.

[geep]

Re: VIZO VX32l HDTV10A

Here are some better picks of bottom of power supply

[budm]

Re: VIZO VX32l HDTV10A

OK, please check the fusible resistor R4 which feed the 380vdc to the 12v/24v transformer driver MOSFETs Q3, Q4. Also check R31, R58 the Source resistor for the Half bridge drive of the MOSFET Q4.

[geep]

Re: VIZO VX32l HDTV10A

I checked the continuity of r4 r31 r58 all have continuity so i went ahead and checked all the rest of the resistors with the same -ww- what ever its called and the ones in the upper left hand corner marked r621 r622 have no continuty dont know if that means anything or not

[budm]

Re: VIZO VX32l HDTV10A

OK, next we need to find out if we have B+ feeding the 12V/24V SMPS IC3 (DLA001A/L6598). You will put the DC meter black lead to the negative leg of the large filter cap C3, this the HOT circuit ground point, the red probe will go to jumper J36 (close to pin 6 of the large transformer T1), I expect to see about 12~15VDC when you turn on the TV. Be real careful since you will be working in the hot side, do not touch anything with your hands.

[geep]

Re: VIZO VX32l HDTV10A

I am getting 13.23 volts

[budm]

Re: VIZO VX32l HDTV10A

OK, since we are getting B+ feeding IC3 OK, I would now suspect that you have bad SMPS IC3.

[geep]

Re: VIZO VX32l HDTV10A

so how would you go about checking it or can you would this be an acceptable replacement http://www.ebay.com/itm/L6598D-HIGH-...item2a0db59f43

[geep]

Re: VIZO VX32l HDTV10A

so any idea if that ic will work

[tom66]

Re: VIZO VX32l HDTV10A

If the original part is L6598, that should work.

[geep]

Re: VIZO VX32l HDTV10A

so my power supply has dla001d ic and i am changing it to a l6598d ic but the chip has no orientation dot any idea which way it goes

[tom66]

Re: VIZO VX32l HDTV10A

I am not sure if DLA001D is same as L6598. There is a tiny orientation dot pressed into the plastic. Requires good light to see.

[geep]

Re: VIZO VX32l HDTV10A

that what i was thinking but there is no dot

[tom66]

Re: VIZO VX32l HDTV10A

Perhaps it is best to replace DLA001D with DLA001D.
There WILL be an orientation dot. It is difficult to see.

Typical SO16:


See the dot at bottom left.

[geep]

Re: VIZO VX32l HDTV10A

but after looking at them closer one edge of the ic by the leg is slanted guess that is orintation

[tom66]

Re: VIZO VX32l HDTV10A

Usually the legs are straight.
Got a jeweller friend? Ask to borrow a loupe. Very useful for this kind of stuff.

[geep]

Re: VIZO VX32l HDTV10A

there is no dot here is a pick of the slant

[geep]

Re: VIZO VX32l HDTV10A

legs are strait chip has slant