Hi all,
I'm troubleshooting this delta DPS 320 EB. Problem : PG Signal is at 0V. Leaky capacitor has all been replaced and could not help to think that the problem lies in the DNA1002 chip which from what I read is a custom IC by delta.
I'm using the following schematic as it looks quite similar (not the same at all in terms of component value but more or less similar) : https://cdn.badcaps-static.com/pdfs/...2cdd095645.pdf
Measurement at the output :
5V : 5.15
12V : 11.7
-12V : -12.08
3.3V : 3.37
under load 5v drop to 5v and 12v line drop to about 11.45v. Values doesn't look too good but should still be within ATX spec (not sure about DNA1002 expected value).
Measurement on DNA1002 pin shows similar number like the one on the simonwyss website, except pin 3 (PG : 0v expected 5v), pin 8 (Unknown : 2.6-2.7v expected 4.25v), pin 9 (5Vin : 5.15) pin 10 (12Vin : 11.7V), pin 14 (unknown : 2.6v expected 2.7v). Expected value is based on symonwyss number. All other pin are pretty much spot on with his measurement.
Adding filtering capacitor on 5V and 12V lines does not help.
Any ideas where could the problem lies ?
Thanks for the help...
I'm troubleshooting this delta DPS 320 EB. Problem : PG Signal is at 0V. Leaky capacitor has all been replaced and could not help to think that the problem lies in the DNA1002 chip which from what I read is a custom IC by delta.
I'm using the following schematic as it looks quite similar (not the same at all in terms of component value but more or less similar) : https://cdn.badcaps-static.com/pdfs/...2cdd095645.pdf
Measurement at the output :
5V : 5.15
12V : 11.7
-12V : -12.08
3.3V : 3.37
under load 5v drop to 5v and 12v line drop to about 11.45v. Values doesn't look too good but should still be within ATX spec (not sure about DNA1002 expected value).
Measurement on DNA1002 pin shows similar number like the one on the simonwyss website, except pin 3 (PG : 0v expected 5v), pin 8 (Unknown : 2.6-2.7v expected 4.25v), pin 9 (5Vin : 5.15) pin 10 (12Vin : 11.7V), pin 14 (unknown : 2.6v expected 2.7v). Expected value is based on symonwyss number. All other pin are pretty much spot on with his measurement.
Adding filtering capacitor on 5V and 12V lines does not help.
Any ideas where could the problem lies ?
Thanks for the help...
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