Question about JVC AV-48WP30 48" Rear Projection Television
I got a convergence problem on my JVC 48wp90. The red would not adjust vertically, so I replaced my ICs and all the corresponding 1 watt resistors. Now my convergence adjusts, but doesn't completely line up. In the screen with the crosses, 123 456 789 positions 4,5,6,8 line up great; position 2 isn't bad either. But 1,3,7, and 9 don't line up. 1 and 3 bend up towards the top of the screen, and 7 and 9 bend down. In the convergence lineup on the grid screen, the red line across the top is wavy and really messed up in the top right corner of the screen? Any suggestions? thanks.
It looks like, to me, that you have to recalibrate the convergence ROM in your TV. I have a JVC 48WP34 and it was doing the same thing. I thought I was saving my settings (Writing to ROM) but I was doing it wrong. It took me a while to figure out how to correctly get the lines straight then save them. If I remember correctly, once you get the lines straight, you have to press 2 buttons at the same time to get it to write to the ROM. Anyway, if you can get the grids to line up properly and spaced properly, you shouldn't need to go to the standard convergence screen through the menu. You should be able to push that convergence button inside your TV near the chips you replaced, use the remote to line up the lines (either the 7 8 9 buttons or 100+ 0 return+ buttons change between colors and 2 5 4 6 adjust up down left right). I think I hit the select button then I hit the select and enter button at the same time to get it to save. Every time I tried to save (before trying the combo I just mentioned) then go into the standard convergence screen in the TV menu, it would undo the settings I did in the other convergence screen. So once I tried the save combo I mentioned a sec ago, I haven't tried making any changes in the standard convergence menu. I hope this helps for you.
Posted on Aug 13, 2008
What you're actually seeing is what the TV looks like without any convergence. I would also suggest replacing them with the 392-150 as they are better at handling the current. If the new STKs don't fix the issue then you may have another issue on the convergence module
Posted on Jun 09, 2007
I'm assuming you used STK392-110 for a replacement. You could use STK392-150 for greater reliability and don't forget a good heat sink compound. (VERY IMPORTANT). What it sounds like is something even the best of techs battle. You probably didn't buy original Sanyo STK's but instead got a couple of the JApan knock-offs. Might I suggest you carefully replace them again and this time order them from B&D Electronics, Bdent.com on the net. You are assured of getting quality OEM replacements that way... We've had a bad batch that purchasing ordered quite some time ago and 2 out of the 14 ordered worked.. The rest were DOA (dead on arrival). Good Luck Bill
Posted on Jun 08, 2007
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