Thanks for your input. Attached is a photo of the UJ11 location where the blown chip has been removed. 3 of the connectors have been damaged (see photo) so I'm concerned I might not be able to solder a replacement chip should I find a dead Mac SE30 board ... Can it be fixed ?
Whilst I found the schematic of UJ11 here, I'm looking for a way to read the real chip pin allocation on the board i.e. where shall I start reading pin 1 and next ones? I noticed all chips are surrounded by 3 perpendicular corners and a single diagonal corner. I guess the diagonal suggests to start reading pin 1 from the top but I'm not sure. If this is correct, the broken connectors are 16,33,40. On the previous schematics, I can see that 40 is connected to A10, I don't see anything with 33, and I'm not sure if 16 is the one next to Part of UH7 that goes to the disc drive port.
If I can't find a replacement chip, would it make sense to connect some connectors e.g. via a 10kΩ resistor to +5V (ex : 20, 21 for the read/write select lines, and 38 for SEL SWIM ?
If I remove the ROM & RAMs, should a regular/working Mac SE 30 boot fine without the horizontal lines ? I'm getting lines with or with them.
Whilst I found the schematic of UJ11 here, I'm looking for a way to read the real chip pin allocation on the board i.e. where shall I start reading pin 1 and next ones? I noticed all chips are surrounded by 3 perpendicular corners and a single diagonal corner. I guess the diagonal suggests to start reading pin 1 from the top but I'm not sure. If this is correct, the broken connectors are 16,33,40. On the previous schematics, I can see that 40 is connected to A10, I don't see anything with 33, and I'm not sure if 16 is the one next to Part of UH7 that goes to the disc drive port.
If I can't find a replacement chip, would it make sense to connect some connectors e.g. via a 10kΩ resistor to +5V (ex : 20, 21 for the read/write select lines, and 38 for SEL SWIM ?
If I remove the ROM & RAMs, should a regular/working Mac SE 30 boot fine without the horizontal lines ? I'm getting lines with or with them.
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