Hi all, working on a Sanyo that powers up and has backlights but no picture. I checked voltages from LVDS cable and I am getting the low voltage 1-1.4V, but no higher voltage. I'm assuming that is why I'm not getting a picture. Also I am getting the proper voltage on the main cap. Any help would be appreciated. Thanks.
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Sanyo FW42D25T
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Re: Sanyo FW42D25T
you should have 12v on the t-con fuse, but the lvds, d/pairs are only low voltage and you really need a scope to see the signal.
if you do not have 12v on the t-con fuse, disconnect the t-con and see if the 12v comes up.Last edited by attainteddragon; 10-04-2017, 04:06 AM.WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?
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Re: Sanyo FW42D25T
have one of these, had a slightly bulged 16 v 470 uf cap, replaced, tv will work ok for 30 seconds then it blanks out backlight and sound goes out, dont seem to be getting the boosted voltage at filter cap, is 170 when hit power button or in standby, wasn't getting backlights to light with tester, tore down to expose them, they all lit up wondering what voltages I should be getting on UL1 and UL2, in standby I guess, because it doesnt seem to want to stay powered up, maybe its a problem in the pfc section, not sure, any ideas?
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Re: Sanyo FW42D25T
Thanks R J, I think I messed something up, I switched out those 2 caps, decided to put the screen back on but had a hard time fooling around with it, the whole frame seems to be really flimsy, might of cracked the screen not sure, instead of getting 30 seconds on, now I get nothing at all, not the first time I've gone in reverse trying to fix something.
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Re: Sanyo FW42D25T
think the panel didnt crack but its no wonder, was working on a small table thats easy to get around, almost dropped the whole thing off of it. With tv plugged in to power, the only voltage I get is 170 on filter cap and voltage on the big diodes next to it, seems to be no voltage at any connectors, no voltage on UL1 or UL2, guess I'll try switching out a few more electrolytics, my gm328a cap tester tests m pretty good out of circuit but for shit in circuit, no choice but to guess, maybe switch out the 4 green samxon caps.Last edited by nomoresonys; 01-11-2023, 07:18 AM.
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