NEWTON POWER NPS-180 Can't Start

[SpyCaps]

Hi all,
I have some problem with my newton's power supply. The purple line have 5 volts but it can't start.
So i decided to replace caps in secondary side but nothing changes.
If anyone can help me please tell me howto fix it.
I attached some pictures of this power supply.
Thanks All.

[Th3_uN1Qu3]

Re: NEWTON POWER NPS-180 Can't Start

Check for secondary side shorts, if no shorts, check that the controller is powered on and operating. You will need an oscilloscope or a multimeter with frequency display for this. If the controller is working, most likely primary transistors have failed open.

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

Check for secondary side shorts, if no shorts, check that the controller is powered on and operating. You will need an oscilloscope or a multimeter with frequency display for this. If the controller is working, most likely primary transistors have failed open.

Thanks Th3_uN1Qu3 but i don't know howto
1.check the shorts
2.i can't find controller datasheet ("2M4 1000DS" label)
3.primary transistors, could you specify for me.



Could you please write in the pictures , i provided?

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

I try to check Resistors ans Idodes, no found opened.

If someone have any idea, please tell me.

Thank you all.

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

Can someone help me? T__T

[c_hegge]

Re: NEWTON POWER NPS-180 Can't Start

When you try to power the PSU on, does the fan twitch quickly or is it totally dead? If the fan twitches, then the problem is most likely in the secondary somewhere. Either a shorted component or a failed controller/monitoring IC.

[Th3_uN1Qu3]

Re: NEWTON POWER NPS-180 Can't Start

If the controller were failed the power supply wouldn't start at all.

[c_hegge]

Re: NEWTON POWER NPS-180 Can't Start

I meant a faulty protection circuit shutting the PSU down even though there isn't really a problem.

[Th3_uN1Qu3]

Re: NEWTON POWER NPS-180 Can't Start

Never seen that one happen. On the other hand i have seen a power supply that kept running just fine while its monitoring circuit was pouring out smoke.

[c_hegge]

Re: NEWTON POWER NPS-180 Can't Start

I know it's not very likely, but I'm sure it's possible.

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

When you try to power the PSU on, does the fan twitch quickly or is it totally dead? If the fan twitches, then the problem is most likely in the secondary somewhere. Either a shorted component or a failed controller/monitoring IC.

fan twitches. I'm sure the problem in secondary. But i don't know where.


shorted component not found , i checked all resistors and diodes and transistors.

i suspec in controller/monitoring IC , can i replace another one instead?

label on front of controller is "2M4 1002DS" < Is it a controller we need?

Thanks

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

If the controller were failed the power supply wouldn't start at all.

in picture after i shorted 2 legs of controller, anything work fine.

so can u explain , where is the bad in this case.

I'm very

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

Major problem that i want to fix this power , because I cannot buy a new one in THAILAND.

Please help me. Thanks all.

[Th3_uN1Qu3]

Re: NEWTON POWER NPS-180 Can't Start

You haven't told us what controller it is and what pins you shorted.

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

You haven't told us what controller it is and what pins you shorted.

Do you think this controller has failed?

[Th3_uN1Qu3]

Re: NEWTON POWER NPS-180 Can't Start

No... but i think some of those parts around it did. Does the power supply work normally, with no trouble, with stable voltages, when the two pins are shorted? If so, you could just leave it like that and call it a day. It is probably one of the protections, if the power supply is working normally they do not need to fire.

If you want to fix it, look for cracked soldering and open resistors around it. Check voltages between each pin and ground when they are not shorted together, it'll give us a better chance of understanding what that section does.

[SpyCaps]

Re: NEWTON POWER NPS-180 Can't Start

when the two pins are shorted , the power supply work normally, the voltage at each line

red 5V yellow 10V orange 3.3V (I'm not sure why yellow is 10V).

----cracked soldering , scanned not found.
----open resistors , tested all not found.

Do you have a datasheet of this controller?
Do you have a schematic of this power supply?

[PCBONEZ]

Re: NEWTON POWER NPS-180 Can't Start

Major problem that i want to fix this power , because I cannot buy a new one in THAILAND.

Please help me. Thanks all.

This is the most common version of NPS-180 but there are others.

All of these NPS-180 PSUs are interchangeable:

Dell Dimension 4500S
Dell NPS-180AB A
Dell HP-U1806F3
Dell 1N405
Dell NPS-180BB
Dell HP-U180F3
Dell 4E044
Dell Optiplex GX60 Small Desktop
Dell Optiplex GX240 Small Desktop
Dell Optiplex GX260 Small Desktop
Dell NPS-180-AB
Dell NPS-180BB
Dell NPS-180BB A
Dell Dimension 4300S
Dell 01N405
Newton NPS-180AB A
Newton NPS-180BB A
Newton NPS-180-AB

Perhaps if you search for different numbers you can find one in Thailand.

Dell Optiplex GX260 Small Desktop PSU should be easy even there.
.

[PCBONEZ]

Re: NEWTON POWER NPS-180 Can't Start

Yellow should be 12v.

[PCBONEZ]

Re: NEWTON POWER NPS-180 Can't Start

This is NPS-180EB.
http://www.oemliquidators.com/search...%20-%206500724

- What version/revision do you have?