hi im new to this as im a carpenter lol but what is the best way to change a buffer ? what do you guys use ?
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Re: buffers
A buffer ic ? I use hot air to remove it and drag soldering to put new one on. I've only done it once so you know it can be done lol. Full disclosure - I ruined the first two chips doing this but third time was a charm
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Re: buffers
lol yer i messed up a board trying to remove one think i need to look for a cheap heat stationComment
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Re: buffers
I messed up a few traces pulling the original chip because I didn't melt the solder under the ic. Turned out fine after some micro surgery
But yeah, I'd recommend a hot air station. Even a cheapo one is better than an uncontrolled paint stripper.Comment
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Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)
- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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Hi all,
I'm interested in understanding how a buffer board chip is working. I know there's about 90 outputs per chip to the plasma panel, but I'm more interested to know about the input pins. I guess that some of them are address pins, but I want to know more.
So far I've found nothing at all. I haven't found any datasheet about the various buffer chips, and I haven't found any schematic for the buffer board using them (Y Buffer Board in Samsung's terminology).
Any information will make me happy. It can be from any buffer chip or plasma TV manufacturer.... -
LCD displays a 2nd image slighty offset vertically. And multiple pairs of black lines along the bottom. Probably common as google "TCL 49S405 double image" pulls up this ifixit post ( link ) with identical ( nearly, but their fault seems to be on the other half of the panel than mine ) problem without solution.
This one looks to be a more difficult to diagnose because most? of TCON seems integrated ( CSOT BGA on buffer baord) into the left panel edge board ( looking from rear of TV) There are 2 buffer boards for each 1/2 of the screen. Main connects to the left buffer board... -
Hi, i have a Panasonic Cf-W5 with the bios password, I tried remove cmos but problem didnot solve.
I uploaded the picture after remove cmos battery, It look like this is a Phoenix bios. The bios dump file in the link i attached
Please help me remove bios password.
Thank you so much
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