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Re: 7104 SMPS no start troubleshooting


 

On Fri, Aug 9, 2019 at 03:39 PM, John Griessen wrote:


On 8/9/19 4:42 PM, [email protected] wrote:


I believe the issue lies in either the +5V rail
Seems likely. 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?

I've been poring over the schematics trying to map out in my head where everything is.

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