I think that the AP test point refers to a pin on the CPU but I'm not totally sure about this.
Here's the [document|33175|troubleshooting section] from the SM-G975F service manual that may help.
I realize that it isn't exactly the same model as yours but the startup circuit would be the same I think.
In Sect. 8.4.1. check if the voltages on the output of U12003 are all OK as this should mean that the input to AP_PS_Hold may be OK. If they're not then it may be the IC or the components mentioned that needed to be checked at that point.
I think that the AP test points are shown - go to p.62 Sect 8.5 service schematics to view them. To me they certainly look like the pin layout of a CPU as I mentioned above.
To locate the capacitors etc, download the file to your computer and then use the search function of your browser (Ctrl + f?) to find them on the board layout diagrams as you need to zoom in approx to 400%.
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Unfortunately my eyes aren't that good any more but no matter how far I zoom in I still can't make out what is written on the AP points. You may have better luck. Also I've never found any Samsung mobile phone service manuals which have more details than this one as far as the schematics go.
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Unfortunately my eyes aren't that good any more but no matter how far I zoom in I still can't make out what is written on the AP points. You may have better luck. Also I've never found any Samsung mobile phone service manuals which have more details than this one as far as the schematics go. They all follow the same format, just different components etc
I think that the AP test point refers to a pin on the CPU but I'm not totally sure about this.
Here's the [document|33175|troubleshooting section] from the SM-G975F service manual that may help.
I realize that it isn't exactly the same model as yours but the startup circuit would be the same I think.
In Sect. 8.4.1. check if the voltages on the output of U12003 are all OK as this should mean that the input to AP_PS_Hold may be OK. If they're not then it may be the IC or the components mentioned that needed to be checked at that point.
I think that the AP test points are shown - go to p.62 Sect 8.5 service schematics to view them. To me they certainly look like the pin layout of a CPU as I mentioned above.
-
To locate the capacitors etc, download the file to your computer and then use the search function of your browser (Ctrl + F?) to find them on the board layout diagrams as you need to zoom in approx to 400%.
+
To locate the capacitors etc, download the file to your computer and then use the search function of your browser (Ctrl + f?) to find them on the board layout diagrams as you need to zoom in approx to 400%.
Unfortunately my eyes aren't that good any more but no matter how far I zoom in I still can't make out what is written on the AP points. You may have better luck. Also I've never found any Samsung mobile phone service manuals which have more details than this one as far as the schematics go.
Hi @juangutier39640,
I think that the AP test point refers to a pin on the CPU but I'm not totally sure about this.
Here's the [document|33175|troubleshooting section] from the SM-G975F service manual that may help.
I realize that it isn't exactly the same model as yours but the startup circuit would be the same I think.
In Sect. 8.4.1. check if the voltages on the output of U12003 are all OK as this should mean that the input to AP_PS_Hold may be OK. If they're not then it may be the IC or the components mentioned that needed to be checked at that point.
I think that the AP test points are shown - go to p.62 Sect 8.5 service schematics to view them. To me they certainly look like the pin layout of a CPU as I mentioned above.
To locate the capacitors etc, download the file to your computer and then use the search function of your browser (Ctrl + F?) to find them on the board layout diagrams as you need to zoom in approx to 400%.
Unfortunately my eyes aren't that good any more but no matter how far I zoom in I still can't make out what is written on the AP points. You may have better luck. Also I've never found any Samsung mobile phone service manuals which have more details than this one as far as the schematics go.