Need some advice on a vintage PC restoration project.
Trying to replace four axial caps on an AT&T PC6300 (aka Olivetti) backplane board that gassed and corroded the leads. Thankfully, no damage to the board. They are Ace 47uf 25V electrolytics -40 - 80C range (see pic).
This is an 8088 computer, so can't find the specs for these caps anywhere. I miraculously found a board schematic, but the caps are not depicted.
I replaced with IC 476TTA025M caps that match the capacitance/voltage/temp specs, but not sure they're working (getting a DMA error on POST which in these old machines sometimes indicates a power rail problem). PSU voltage looks normal. Could be due to another issue entirely, but thought I'd pick your brains about these old cap specs.
Trying to replace four axial caps on an AT&T PC6300 (aka Olivetti) backplane board that gassed and corroded the leads. Thankfully, no damage to the board. They are Ace 47uf 25V electrolytics -40 - 80C range (see pic).
This is an 8088 computer, so can't find the specs for these caps anywhere. I miraculously found a board schematic, but the caps are not depicted.
I replaced with IC 476TTA025M caps that match the capacitance/voltage/temp specs, but not sure they're working (getting a DMA error on POST which in these old machines sometimes indicates a power rail problem). PSU voltage looks normal. Could be due to another issue entirely, but thought I'd pick your brains about these old cap specs.
Attached Files
Comment