madmaxamdam
Member
Well, after resurrecting an IBM PC, with the valuable help of many senior members of this forum, I'm now tweaking with this IBM XT 5160.
At minimum diagnostic configuration the power supply won't work, unless connector P8 is removed.
The readings on the board power connector are:
GND to +12V: 0.4 Ohm (steady value after a quick decrease)
GND to -12V: Infinite
GND to +5V: 198 Ohm (slowly increasing over time)
GND to -5V: Infinite
So it looks like the issue is on the +12V line.
I've read here that in this situation the C56 tantalum capacitor is very likely to be the faulty component. The suggestion is simply to remove it from the board.
A quick questions, before unsoldering:
Is that capacitor used for anything?
Can I safely give power to the board without that cap, or shall I replace it with another working cap?
Thanks in advance,
Max
At minimum diagnostic configuration the power supply won't work, unless connector P8 is removed.
The readings on the board power connector are:
GND to +12V: 0.4 Ohm (steady value after a quick decrease)
GND to -12V: Infinite
GND to +5V: 198 Ohm (slowly increasing over time)
GND to -5V: Infinite
So it looks like the issue is on the +12V line.
I've read here that in this situation the C56 tantalum capacitor is very likely to be the faulty component. The suggestion is simply to remove it from the board.
A quick questions, before unsoldering:
Is that capacitor used for anything?
Can I safely give power to the board without that cap, or shall I replace it with another working cap?
Thanks in advance,
Max