Is there any reliable way to determine the number of layers on a PCB??
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Thanks to all for being__WAR_KITTENS____!
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Re: PCB layers
Not always, but some PCBs actually do have the layer numbers stamped on the board on each layer. -
Re: PCB layers
Diamond saw and jewelers loupe is the most reliable way. As an alternative you can drill out a through hole via, something on the corner of the board that a mounting screw would go through, and then count the layers inside the hole.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.... -
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Hello,
I'm new to this Forum, so I hope it's the right place for this topic.
Im a student from germany, and as a hobby I repair electronics. I started microsoldering maybe 1-2 years ago.
I have a MacBook Pro 14" m1 Pro with 10 Cores and 16/1tb storage. The board Number is 820-02098-A.
The MacBook has a light water damage. Coffee got spilled over it, but the Mac continued working only the battery didn't charge anymore and when the battery was empty the Mac turned off and doesn't show any sign of life now.
I opened it up and there were only three drops of coffee... -
Hi
i have a a2179 which is locked. On the other hand I have an unlock t2chip(just the upper layer of ic)I wanna know if I can just change the upper layer of the t2 chip.
any way does anyone know what each layer do?08-03-2024, 01:46 AM -
I got this set for very cheap, it works perfectly but the catch is that the protective coating was damaged. About 45% of the screen had a green tint, you can see exactly where the layer changed colors to a blueish tone (that actually makes everything green).
"Ok, that's probably just the anti-glare layer" - I thought. So using a microfiber cloth and automotive metal polish I was easily able to turn it into a nice mirror.
Unfortunately, the damage was beyond this layer and everything still had a horrible green tint. I initially...
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