On 8/9/19 5:47 PM,
[email protected] wrote:
On Fri, Aug 9, 2019 at 03:39 PM, John Griessen wrote:
Can you rig a little current to flow through a resistance to be
mild like
20 milliamps total, then do you have a 6 or 7 digit voltmeter? Probing will
show dropping volts along power
rails until you get next to the offending tantalum cap, then not change much
if probing farther along than that...
Input it where?
Right where the 5V is made, at its SMPS source. or rectifier and caps, (I have not looked at a 7104 schematic today), and relative to a ground point that is the 5V return.
So, that way, as you probe along in the 5V loads, and/or hold up caps, one will be more of a short than the whole
and you will notice that lowness.
If you no longer suspect the 5V and switch, *DO* switch the return GND point also to be related to the new suspect.
