Delta DPS-200PB-185A Schematic

[TecnicaNTT]

Re: Delta DPS-200PB-185A Schematic

left to right: Cm6800, ncp1203, lm393, lm393

thanks !

[TecnicaNTT]

Re: Delta DPS-200PB-185A Schematic

Hello
can anyone help, telling me the partnumber for the component in the picture ?
mine is blown up.
thanks

[Alex Rabinovich]

Re: Delta DPS-200PB-185A Schematic

left to right: CM6800, NCP1203, LM393, LM393

[luciananuta]

Re: Delta DPS-200PB-185A Schematic

Does anyone have a picture of the daughterboard on the side?
My PSU has an 8 pin IC blown on the small board and I can not read any numbers on it.

[PeteS in CA]

Re: Delta DPS-200PB-185A Schematic

Unfortunately, the picture is so blurry that I can "read" the values without my glasses as well as I can with my glasses. I've seen high value resistors used for the function you described in applications ranging from 384x family PWMs, Power Integrations' regulators, and PFC controllers. With no voltage at the 6800 Vcc pin either there is an open in the string of resistors (resistor or solder joint) or there is a short from the 6800 Vcc pin to return.

[kwakerman]

Re: Delta DPS-200PB-185A Schematic

If the resistors in that string are high value, for example 470K or 1M, high value resistors sometimes go higher resistance or open up over time. If there isn't a bad solder joint or a short from the Vcc pin to return, one of those resistors may be open.

These ones if I remember correctly

[PeteS in CA]

Re: Delta DPS-200PB-185A Schematic

From memory there is a string of resistors that feed the rectified mains to the 6800 vcc pin. Vcc needs to get up to 5v before the 6800 will start up.

If the resistors in that string are high value, for example 470K or 1M, high value resistors sometimes go higher resistance or open up over time. If there isn't a bad solder joint or a short from the Vcc pin to return, one of those resistors may be open.

[kwakerman]

Re: Delta DPS-200PB-185A Schematic

Hello Dears , Ihave a problem in a DPS-200PB-185A the problem is there is no short or damage resistors , but i noticed that on the 6800 vcc no power . any suggestion .

From memory there is a string of resistors that feed the rectified mains to the 6800 vcc pin. Vcc needs to get up to 5v before the 6800 will start up.

[rabihz]

Re: Delta DPS-200PB-185A Schematic

Hello Dears , Ihave a problem in a DPS-200PB-185A the problem is there is no short or damage resistors , but i noticed that on the 6800 vcc no power . any suggestion .

[kwakerman]

Re: Delta DPS-200PB-185A Schematic

I have also DPS-200PB-185A.
The only parts I don't know what they are are the smd resistors conected to Q501 and Q351. If you can magnify the first picture maybe I'll see the values.
01X ?
30C ?
05?X?
69Y ?
The one is connected to the pin 3 of T351 is no more there so I have no information about it.
Many thanks!

Curiosity got the better of me so I opened the one I previously repaired to have a look (would probably have done that anyway once the other one got here).

The one connected to T351/3 is a 30C (20K). The other ones in that area are two of 01X (10 Ohm), 30C (20K) (a different one), 69Y (5.11 ohm) and an 09X (12.1 ohm). I think that last one is the one you have as 05?X. Don't forget to check the ones around the CM6800 chip, if any of them are blown replace the chip too.

[kwakerman]

Re: Delta DPS-200PB-185A Schematic

I have also DPS-200PB-185A.
The only parts I don't know what they are are the smd resistors conected to Q501 and Q351. If you can magnify the first picture maybe I'll see the values.
01X ?
30C ?
05?X?
69Y ?
The one is connected to the pin 3 of T351 is no more there so I have no information about it.
Many thanks!

I should be looking at another one in a few days time (once it gets here), will have a look and let you know what is connected to T351/3

[PeteS in CA]

Re: Delta DPS-200PB-185A Schematic

Keep in mind that resistors usually don't fry or open up without a cause. A burnt resistor means too much current was passed through it, possibly by some shorted device.

[R_J]

Re: Delta DPS-200PB-185A Schematic

The resistor values are according to EIA-96 code
01x = 10Ω
30C =20kΩ
05x = 11Ω
69y = 5.11Ω

[radu-dorini]

Re: Delta DPS-200PB-185A Schematic

I have also DPS-200PB-185A.
The only parts I don't know what they are are the smd resistors conected to Q501 and Q351. If you can magnify the first picture maybe I'll see the values.
01X ?
30C ?
05?X?
69Y ?
The one is connected to the pin 3 of T351 is no more there so I have no information about it.
Many thanks!

[kwakerman]

Re: Delta DPS-200PB-185A Schematic

Me again, just a quick update to let you know that it is fixed and on test at the moment. The original symptoms was no 52V output and the 12v one was at 11.5 but dropped off as soon as any load was applied. To repair it I had to replace Q851 (also the flexible insulator to be on the safe side), R335 (0.56 ohm), a '10X' (10 ohm SMD resistor) in Q851 drive circuit, the CM6800 control chip and the SMD resistor connected to pin 9 (it was a '18A' (150 ohm)). Checked everything else I could with meter and Huntron tracker and nothing else obviously damaged. Used an isolated variable power supply to start it while monotoring the CM6800 VCC supply (pin 13). At about 88vac input the power supply started up and worked fine all the way up to 240vac input. The VCC supply slowly rose as the input was increased, it got to about 5vdc with 88vac input then when the power supply started it jumped to 15vdc and remained steady at all input voltages. Hope that helps someone in the future - cheers.

[kwakerman]

Re: Delta DPS-200PB-185A Schematic

Hi guys, Noob here, I too am in the process of trying to repair one of these PSUs without a circuit diagram. Curiously it appears to be trying to start and had about 11.5 v on the 12v output but that dropped off as soon as any load was applied. I think I have identified most of the damaged components, the STW9NK90Z (Q851) was shorted all round, R355 (0.56 ohm) was open circuit, there is also a '10X' (10 Ohm) 0603 size resistor in Q851's drive circuit that is open. On the sub PCB I suspect the CM6800 is dead/damaged, one of the diodes showed short until the IC was removed then tested ok. The one item I am struggling to identify is the code on the 0603 size resistor connected to pin 9 of the CM6800, it looks to be something like 10A or 18A but it has a hole in it (and is O/C) which makes it hard to confirm. Are any of you guys able to have a look at at yours to let me know what that resistor code is? I'll keep you updated on how I get on, but it may be a little while as my replacement CM6800 are on a slow boat from China as I couldn't find any with the usual UK suppliers.

[NAVY ET1]

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

[PeteS in CA]

Re: Delta DPS-200PB-185A Schematic

Looking at the picture, it looks like there is a bridge rectifier after the line filter circuit (BTW, all those parts with CY# reference designators are Y capacitors, safety agency approved for use from primary to chassis). If the PFC circuit is not operating that bridge rectifier is the source of the 163V (with 120VAC input voltage). The PFC circuit boosts the voltage across C801 to ~400V.

You mentioned R355 and R505 being .56 ohm resistors. Is that from the markings or from measuring the parts? If from markings, measure them. Some resistors are fusible, meaning that they open when subjected to excessive current.

If one or both are open, they will need to be replaced, but fuses seldom open without cause. R355 and/or R505 may be current sense resistors in the source circuit of a MOSFET. If one or both are open, check whether the relevant MOSFET(s) may be shorted.

[PeteS in CA]

Re: Delta DPS-200PB-185A Schematic

This is supposed to be a replacement P.S. from Amazon. ... 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, ... are referring to. They have added a lot of new terminology and types of parts in the last years. Thanks for any help. LYLE

The rated 52V current is 1/4 the rated current of the Delta Products power supply. It's not equivalent.

Sorry for my carelessness. "PFC" = Power Factor Correction. "PWA" = Printed Wiring Assembly, i.e. the fully assembled circuit board as opposed to the bare printed circuit board (= PCB).

If I understand this correctly:

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.

It means that the PFC circuit in the one with 163V across C801 is not working.

[R_J]

Re: Delta DPS-200PB-185A Schematic

I was looking at your Scan0167, and I see you have the T351 transformer coil across the Drain and source of Q351, are you sure this is correct or could Q351 be shorted D~S? If the fet is shorted, that would be why there is no +52v
The other transformer T??? (connected to R505) can't be drawn correctly either, If you are just using a meter to check the resistance I suspect there are shorted components in that area.