NeXT
Veteran Member
Billdeg pushed a Unibus controller for the CR11 card reader my way, mentioning that it was "very dead".
He wasn't joking.
Looks to be an 8881 that went into meltdown. I've never seen a chip blow up so violently like that. There's burns straight through the PCB.
The full engineering drawings are here, thank GOD so I will be attempting to repair the board. The blown IC in question is E09 but I can't immediately tell where the obvious spike in voltage came from. The reader? The backplane?. I'm sure that whatever happened any surrounding circuits are also toast. It's going to be an absolute joyride to test everything out.
He wasn't joking.
Looks to be an 8881 that went into meltdown. I've never seen a chip blow up so violently like that. There's burns straight through the PCB.
The full engineering drawings are here, thank GOD so I will be attempting to repair the board. The blown IC in question is E09 but I can't immediately tell where the obvious spike in voltage came from. The reader? The backplane?. I'm sure that whatever happened any surrounding circuits are also toast. It's going to be an absolute joyride to test everything out.