Re: Delta DPS-200PB-185A Schematic

The (2) .56Ohm 2W Resistors are open and the Q351 is shorted. I sacrificed one P.S. and tore it apart to get more info. The .56Ohm. resistors are labeled with the value on them. I have updated the parts list and the front and back photos of the circuit board. I hope this helps others with similar problems on these P.S. I haven't tried to draw out the schematic but maybe someone else has. THANKS, LYLE...

Re: Delta DPS-200PB-185A Schematic

These P.S.'s are out of an Interlogix Tru Vision NVR. I just received a new Hikvision NVR by UPS and the P.S. is identical. I opened it up to put the old Hard Drive in and checked the voltage across C801 an it reads 400vdc. They call it an LTS Switching P.S. The voltages out of the new one are 12vdc and 52.6vdc. Thats all the new info I have. LYLE

Re: Delta DPS-200PB-185A Schematic

This is supposed to be a replacement P.S. from Amazon. I took a peek inside and everything is different. It looks to be lighter weight. The 12vdc output plug is different and the output power ratings are much less. The case looks exactly the same. As for your last comments: It has been awhile since the Navy Schools - please enplane what PFC, PWA, Optic sensor & ring xfmr. are referring to. They have added a lot of new terminology and types of parts in the last years. Thanks for any help. LYLE...

Re: Delta DPS-200PB-185A Schematic

The fuses are good. I have 163vdc out of the first part of the P.S. across the CAP. C801. the power res. R355 & R505 (.56 Ohm.) do not look real good, they have some marks in the coating on them. The 12 VDC outputs measure 11.5v on one and 10.5v on the other. The 52vdc (POE Power) is dead. I can see volt. on the primary of the trans. It measures the same on all thermals like there is an open in the ckt. No volt on the secondary. The files show how far I have got with trying to figure out the schematic. The board is very tight to see everything....

Re: Delta DPS-200PB-185A Schematic

I am having a problem with a similar power supply. You asked for some pictures and I have some. I have three of these on my workbench right now. None of them appear to have bad caps but the outputs are low or missing altogether....