Nama
Veteran Member
I think I'm suffering from a partial short of the 5v line to GND.
I was wondering if someone with a SOL-20 would be able to take a resistance reading between the GND and the 5v lines (maybe with the J10 connector to the PSU removed).
I've just replaced a bad 74LS04, and presently I'm getting about 95 ohms between 5V and GND which still seems very low. I don't want to plug it into the SOL PSU just yet until I'm sure the problem is solved. I've plugged the PSU in previously when trying to find the fault, but I kept blowing the 2N2222 on the PSU board. I've replaced the 2N2222 3 times now, and don't want to have to do it again until I'm sure the SOL motherboard is good.
Any help would be greatly appreciated.
Much thanks.
Phil
I was wondering if someone with a SOL-20 would be able to take a resistance reading between the GND and the 5v lines (maybe with the J10 connector to the PSU removed).
I've just replaced a bad 74LS04, and presently I'm getting about 95 ohms between 5V and GND which still seems very low. I don't want to plug it into the SOL PSU just yet until I'm sure the problem is solved. I've plugged the PSU in previously when trying to find the fault, but I kept blowing the 2N2222 on the PSU board. I've replaced the 2N2222 3 times now, and don't want to have to do it again until I'm sure the SOL motherboard is good.
Any help would be greatly appreciated.
Much thanks.
Phil
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