LG 60PV450 Z-SUS unavailable...sustitution?

[tnobble1]

Hello all,
First post, so I'll ask for patience in advance . TV went out without warning a few days back. Traced down to a burned out IC on the z-sus board (IC216). Can't find any available anywhere, so a couple of questions-

1-Anyone know where I can find one?
2-Is it possible to find and replace the IC?
3-Is there something I should be looking for as the cause of this IC burning out?

Any help would be greatly appreciated. I've enclosed a few pics, but haven't figured out how to notate them yet

[tom66]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Have you checked if any of the adjacent MOSFETs/IGBTs are showing as shorted? They could damage the ic (it will be a gate driver)

[tnobble1]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Is it possible to test the MOSFETs/IGBTs in circuit since there's a short on the board? Or would I have to take them off to accurately test them? Also while searching for the EAX66076601 board, came across the EAX64232101 board from a Zenith Z60PV220 that looks identical. Can these boards be subbed?

[RCA2000]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Well--since LG has owned Zenith for some time--VERY likely a Z-sus from a zenith would be the same.

[tom66]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

^^Yes, if LG rebadged this set as a Zenith, which they did for some models. As did Sanyo (prior to becoming a division of Panasonic.)

The MOSFET/IGBTs have 3 pins and are primarily mounted on the heatsinks. Check all three combinations of pins (1-2, 2-3 and 3-1) for shorts using a multimeter on diode mode. (Board must be removed and not powered up.) Note if you find any low readings (<200 in diode mode) if you do the component needs to be removed and tested out of circuit.

[Ltank]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

A lot of sets have mosfets in parallel. All will show bad if one shorts out. If parts are cheap enough and it's your tv I would replace all three or four.

[tnobble1]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Thanks guys for the responses. Ordered a z-sus board, waiting for it to arrive...will check back with results

[tnobble1]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Just a thought, when the new z-sus arrives, what would be the safest way to adjust initial VZB voltage? Hate to hook it up and destroy something else.Which would be worse- voltage too high or too low?

[Shinju]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Also inspect the soldier joints for those 3 copper coils on your new board, those cold soldier joints are notorious for failure. Applying new solider on them will keep them from failing as the factory solider was weak to begin with.

[tom66]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Too high would lead to pixels mal-discharging (orange tint, or lots of randomly lit up pixels in dark areas.) Too low would lead to a pink tint or dead pixels.

In almost every case the voltage will be OK, and even if it is too high, it will not do any harm (you should check and adjust it so you avoid picture artifacts.)

[tnobble1]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Finally found and received new z-sus board. It's actually the Zenith I saw earlier. Installed it and at first had a green "solarized" effect. After checking here, I found a post that talked about the ribbon cables maybe causing this-Spot on, rechecked cables and !!!, I could see my screen again! Checked voltages, everything was within .1-.2 volts. Thanks guys, Y'all gave me the gumption to try this! But and it seems there's always a but, I have a new, hopefully small problem. 2 vertical green lines on screen. They look to be not more than a pixel or two wide, however they are there, except where the screen is white. Pic will hopefully show what I mean

[tnobble1]

Re: LG 60PV450 Z-SUS unavailable...sustitution?

Just took a closer look a the pics I took...the first shows 3 lines, but the 1 on the left has disappeared, leaving just the 2 in pics 2 & 3 taken during the test screen