At present the machine doesn't boot, however there is clear damage on the area of the battery, and having removed the RTC (IC58), there were some rather immediate problems apparent from the get go.
The clock oscillator circuit has a missing SMD cap, and from a circuit PoV, there are some definite missing connections. (More on that later)
It was also clear that the PLCC socket was heavily corroded, so given some of the nearby tracks were damaged, i decided it had to go. This is part way through the cleanup and you can see how bad the corrosion is on the pins:
- PXL_20220522_145856910.jpg (463.45 KiB) Viewed 5454 times
It also gives a good view of the clock oscillator circuit damage.
All the pins came out just fine:
- PXL_20220522_150627091.jpg (385.87 KiB) Viewed 5454 times
And you can see here the level of corrosion in this selection:
- PXL_20220522_150618390.jpg (330.81 KiB) Viewed 5454 times
Though you might have to zoom in!!
I've found a lot of missing connections now the area is clear, but nothing I feel that can't be fixed with some bodge wiring, though I am going to have to break out the finest wire I can find!!
The one thing that strikes me with this machine is how fine the tracks are. They really are super fine and very susceptible to damage by a leaky battery, and I think I got lucky here in that the damage is not as bad as it could have been. Damage is marked with black dots:
- PXL_20220522_155822642.jpg (434.71 KiB) Viewed 5454 times
So first order of the day, get the tracks repaired so we can see what it does, then take it from there. One thing at a time.
