PSU is old 2 years, have been working continuously all the time, and just stops.
Fan doesnt revolve, no voltage at all.
No visible phisical damage, everything looks OK.
Where to start, what to test....
ciki022
Member
Last Activity: 09-17-2021, 05:39 AM
Joined: 11-03-2013
Location: Svrljig
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Re: HP PS-3701-1, fan works, no voltage
Can You provide me further help on this issue ? -
Re: HP PS-3701-1, fan works, no voltage
@stj
you do have voltage because it's a 12v fan.
as i see solder on the edge connector - i think you need to explain exactly what your doing with it and if it ever worked before or after you did that.
As I said, I DO NOT have voltage 12v on edge connector, but fan revolves.
I used it to power 4 pieces of r9 270 graphic cards, undervolted, underclocked, thru pci-e 6 pin soldered on the edge connector.
And that worked well for several months
@Behemot
Oh, THERE....Leave a comment:
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HP PS-3701-1, fan works, no voltage
Hi,
Power supply from HP server, model PS-3701-1, worked well for some time, and suddenly, doesnt give voltage, fan revolves, but no voltage.
What should I test first, any suggestions ?
Serveral images attached
On third image, coil in right bottom corner is not the same color as the other one, maybe there is problem....Last edited by ciki022; 07-02-2016, 12:13 PM. -
LEPA G1600-MA voltage drops under load
Hello,
Mentioned PS, LEPA G1600-MA, without load works fine, giving 12,25 V. But, under load, voltage drops to 10,5 - 10,8 V, and computers works 30 seconds to 1-2-5 minutes and then reboots.
And the voltage drop same when one graphic card is attached or more.
Everything looks normal, no bulged caps, no burnt out parts, what should I first check ?
Link to this PS
[url]http://vr-zone.com/articles/lepa-g1600-ma-1600w-psu-review/17999.html/4[/url]
Thanks in advance
Goranhttps://Hello,<br /> <br /> Mentione..., without loadLast edited by ciki022; 01-26-2016, 12:16 PM. -
Re: Codegen 400W PFC - 1,98 V +5VSB
shots...Leave a comment:
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Codegen 400W PFC - 1,98 V +5VSB
As described in title, I have this PSU, when testing, fan is not revolving, no other voltages, just +5VSB, measured, oscilating between 1,70 and 1,98 V.
Visualy checked, nothing seems to be burned.
Before I start to desolder and check primary power transistors and diodes, chould I check anything else ?
If needed, I will attach inside pictures -
Re: Viewsonic va2213w illumination problem
No, I dont own it, it is my friends property, and I will ask him about the faultLeave a comment:
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Re: Viewsonic va2213w illumination problem
I dont understand what You mean
I tried both in first place
I will post images later...Leave a comment:
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Viewsonic va2213w illumination problem
Viewsonic VA2213W, there is an illumination problem, in the middle of the screen, images attached.
I visualy checked the power board and main board, there is no bulged capacitors, no burnings, everything looks normal, and quite good.
I dont have ESR meter, only digital multimeter, but I didnt measured any voltages.
I found service manual, also in attachment.
Where to start looking for the problem ?...Last edited by ciki022; 02-16-2014, 11:38 AM. -
Re: PSU works, but connected to motherboard does not
Yes, my house installations have proper grounding, and I am using proper cords with ground connector ( PC power cords have the ground )
But I dont know which one is live and which one neutral, and Schuko sockets can be inserted both ways ( probably the same is in Czech Republic )Leave a comment:
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Re: PSU works, but connected to motherboard does not
I have question regarding dim light bulb tester
I am in Europe, line voltage 220 V 50Hz, and all schematics that I have found are for 110 V 60Hz, and they show that on live wire should be the switch, not the way around
In Europe, power cord can be inserted in both ways, it is simertical
Is this, to know which wire is live, is really important for this purpose ?Leave a comment:
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Re: PSU works, but connected to motherboard does not
senz_90
I am learning, but like I said one post before, maybe is problem that english is not my mother language
Because of the fact that schottky rectifier is in TO-220AB package, similar to transistors, I used these terms C, E and G, instead of terms leg 1,2,3
I was going in electronical high school, computers and automatics, and later I finished Economics university, because of getting jobLast edited by ciki022; 11-11-2013, 10:24 AM.Leave a comment:
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Re: PSU works, but connected to motherboard does not
Behemont
You are all right, that is not rectifier, that is power transistor, I apologize for that ( as You can see my mother language is not english, then serbian, and in all that translation of technical terms, I mixed up some things, and You also mentioned rectifier three posts before )
I will try to found same type of these 13007 transistors, and replace them
I replaced all 4 primary diodes 2a05 with R207, because I didnt found 2a05, but can I replace these diodes with kbp06 bridge rectifier ?Leave a comment:
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Re: PSU works, but connected to motherboard does not
And what to check now ?Last edited by ciki022; 11-10-2013, 03:31 PM.Leave a comment:
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Re: PSU works, but connected to motherboard does not
I did that without thermistor and +12 V rectifier did not blast...Leave a comment:
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Re: PSU works, but connected to motherboard does not
I assembled PSU, but does not start at all, fan is not revolving, no voltage, fuse didnt blown
After two fuse explodings, i replaced next parts :
1. Two rectifiers 13007, with one D13007 and one E13007-2 ( first rectifier BU5027A, that refers to +12V is good )
2. NTC power thermistor 5D-9
3. Ceramic condenser 102 1KV
4. All 4 primary diodes 2a05 with R207
What should I check next ?Last edited by ciki022; 11-10-2013, 02:05 PM.Leave a comment:
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Re: PSU works, but connected to motherboard does not
I have checked these three diode brackets, marked S16C40C - F10C20C - S16C40C, but not sure what readings should I get
I got these results :
S16C40C - measured with multimeter set to diode switch, black on colector, got 164 to both emitter and gate
F10C20C - black on colector, got 494 to both E and G...Leave a comment:
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Re: PSU works, but connected to motherboard does not
I just realized, about checking these 4 diodes, that in fact three of them are bad, one good.
This good one, when I measure it with multimeter, set to diode switch, red on anode - black on cathode, gives 549, other way around gives 1
These 3 bad diodes, gives 002-003, both ways measured
Can I find diodes that gives similar results when measured and relace all 4 ?Leave a comment:
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Re: PSU works, but connected to motherboard does not
I visual checked psu again, and found next, images attached :
1. NTC power thermistor 5D-9 has almost invisible crack on it
2. Small ceramic condenser, usualy colored yellow, now is brown, marks are invisible, cracked in two halves, one "leg" on each peace, comparing size of other similar ceramic condensers, I concluded that mark was 102 1KV
With multimeter I checked all three rectifiers, and all is OK.
Also checked 4 diodes, marked 2A05, but one is bad, gives different measurment from other...Last edited by ciki022; 11-09-2013, 02:57 PM.Leave a comment:
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