STM M48T86PC1 is an RTC clock package similar to DALLAS 12887 et al. Unfortunately, the existing instructions for DALLAS did not work for it, and I had to drill away the entire case to find out where the wires were.
Now then, here are the instructions on how repair an M48T86PC1 by drilling and attaching an external CR2032 coin battery to it:
https://github.com/targeted/m48t86pc1-rtc-repair
Thanks for sharing!!
PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
Additional hint: there's a 32.768kHz crystal soldered to two similar pins at the other end of the cap.
I wonder if Necroware's method of using hot air and chipping away at the enbrittlened epoxy would work. It should.
I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O
I'm surprised that you didn't come across the sun nvram faq in your research.
https://www.sun3arc.org/FAQ/sun-nvram-hostid.faq.phtml
Why are people still drilling two holes when GND on the battery is connected directly to the GND pin...
jmarsh wrote on 2024-10-29, 02:05:Why are people still drilling two holes when GND on the battery is connected directly to the GND pin...
Your average 48T device is usually in a socket. Soldering to the ground pin makes it difficult to insert. A flying lead to a convenient earth on the PCB leashes the device to the board.
For DS12887 type devices soldered to a PCB a flying lead is a no brainer when dremelling in-situ.
