Faulty parts Dell Optiplex 780 SFF Power SupplyI have been looking for several weeks for
circuit diagram. Model H235P-00. P/N:HP-D2352A0 Power Supply 235W. I wonder if anyone knows where I can find a schematic.
Many thanks to spilihps for the question. The link to the diagram in the forum is helpful but I cannot read the part values and number on the circuit board and would be very grateful for a diagram at higher resolution.
These are the faulty chips so far found.
(a) Fuse F 6.3A 250V 370
(b) ST W7NK90Z CC OPC VW MAR825
(c) 23NM60N GK03P V3 CHN 939
My second 780 SFF Power Supply PSU
(d) TNY280PN K818 54478A top of chip blown out.
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Third
780 SFF Power Supply PSU. Need circuit diagram for
Dell P/N: R224M P/N PS-5231-5DF1-LF 235Over a period of time failed post on a number of occasions.
With Error codes looked like motherboard problems.
Proved mother board was OK by using standard ATX
PSU with a PWR adapter cable bought on Ebay for about £1.48 (Ebay item 143402320070).
The Dell Optilplex 780 motherboard has smaller PSU connector.
Parts ordered on Ebay 29/11/2019 (ebay item number in brackets) most items from China
Ordered 5pcs STW9NK90Z W9NK90Z N-CHANNEL 900V 1.1W 8A MOSFET TO-247 ( 172821066742 ) £4.33.
The original ST W7NK90Z was too expensive
5pcs F23NM60N TO-220F new
( 123324260374 )
TNY280PN TNY280 DIP7 Integrated Circuit from Power Integrations £2.40
ATX PSU Standard 24Pin Female to Mini 24P Male Internal Power Adapter
Converter Cable For DELL 780 980 760 960 PC £1.48 (Ebay item 143402320070)
2x 5A Radial PCB Quick Fast Blow Circular Fuse
( 283561064019 ) £2.25Regards Tony Edge
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