Re: P5PE-VM question ?
The black connector on the board or leads with probes soldered to it.
The black connector on the board or leads with probes soldered to it.
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Re: P5PE-VM question ?
Here's the voltage I got on the FETs at the board...
There's a possibility that my buck controller is faulty and it's a clock generator as well...
CLK865J02FLF....the issue is, I can't find datasheet of it...Attached FilesComment
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Re: P5PE-VM question ?
The voltages look good to me, so I don't think the buck controller is bad. Only the voltage at the Source of Q10 doesn't seem right (should be the same as Q6 and Q8). But I think you just didn't measure it properly, because Q11 does appear to have the correct V_core voltage on its Drain.
Anyways, what I am more worried about is all of the KZG caps I see scattered everywhere on the motherboard. Unless you have pulled out each one from the motherboard and checked it for proper capacitance *and* ESR, there's no telling if that's the problem or not. (And also, sometimes an ESR/capacitance meter can be fooled by an electrically leaky electrolytic capacitor, so keep that in mind if you did test all of those KZG caps. In particular, anything that reads over 20% of the nominal capacitance could be leaky).Comment
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Re: P5PE-VM question ?
which one are the KZG caps ( what color ) ? I haven't tested them with ESR meter, I don't have it yet ....does it mean that I need to desolder them all ?Comment
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Re: P5PE-VM question ?
I have a capacitance meter, it can read capacitance and impedance, but no ability for reading ESR...would it be good enough testing them ?Comment
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Re: P5PE-VM question ?
Are you talking about the capacitors on FET filter to Vcore ?Comment
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Re: P5PE-VM question ?
I can pull them out test and replace if needed...Comment
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ASRock B550 PG Velocita
Ryzen 9 "Vermeer" 5900X
32 GB G.Skill RipJaws V F4-3200C16D-32GVR
Arc A770 16 GB
eVGA Supernova G3 750W
Western Digital Black SN850 1TB NVMe SSD
Alienware AW3423DWF OLED
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Re: P5PE-VM question ?
are those KZG capacitors, you're talking about ?Attached FilesComment
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ASRock B550 PG Velocita
Ryzen 9 "Vermeer" 5900X
32 GB G.Skill RipJaws V F4-3200C16D-32GVR
Arc A770 16 GB
eVGA Supernova G3 750W
Western Digital Black SN850 1TB NVMe SSD
Alienware AW3423DWF OLED
"¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo
"There's nothing more unattractive than a chick smoking a cigarette" -Topcat
"Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat
"did I see a chair fly? I think I did! Time for popcorn!" -ratdude747Comment
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Re: P5PE-VM question ?
I've measured some of KZG caps you're talking about...
Measurement in circuit...they give me value...some of them 33K, some of them ..87K...
are they bad ones ?Comment
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Re: P5PE-VM question ?
Well, I don't have X-ray vision so I can't give you a verdict from the comfy seat of my chair... but all I can tell you is that those Chemicon KZG capacitors do fail quite a bit, and sometimes without visual signs too.
Impedance and ESR become close at relatively high frequeincies (around 100 KHz), so yes you can *probably* use the impedance on your meter. Speaking of which, what meter is it?
If you want to test them, YES.Originally posted by bianchi77
In-circuit readings on motherboards are often inaccurate and/or total garbage. So remove the caps and test. Better yet, if you have good quality low-ESR replacements, just replace those KZG caps and at least be done with that part. Then you won't wonder if bad caps were the problem, at least.
Also, the black caps around the CPU appear to be Panasonic FL (4V 680 uF). Panasonic makes very good caps, but even these can go bad simply because of where they are placed - right under the CPU heatsink. If a hot-running CPU was used, they could be dried out. I recommend getting polymer caps for those positions.Last edited by momaka; 09-08-2016, 08:28 PM.Comment
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Re: P5PE-VM question ?
It's atlas LC-45....it can test on 200KHz frequency...but can it be done in circuit ?Impedance and ESR become close at relatively high frequeincies (around 100 KHz), so yes you can *probably* use the impedance on your meter. Speaking of which, what meter is it?
What value should I see on it ?
It's easier when it's in circuit...but I'm not sure if the value is valid, because it's connected to other components...Comment
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Re: P5PE-VM question ?
Here's the value I got for in circuit test with LCR-45...
Frequency = 200KHz...
Impedance (Z) = -163.1mOhm - j57.69mOhm...C = 1.2 uF
The capacitor value on the label is 1000uF....and it looks like parallel with the other 4...
Any ideas with those figures ?Comment
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Re: P5PE-VM question ?
Of course it is easier to test the caps in the circuit but the result you get will not be right dues to the fact that also have other components connected in parallel with the cap. You can waste lots of time doing short cut.
Why don't you just experiment by measuring spare known spec. caps with your LC-45 to see what reading you get, and then just try removing just one of the paralleled cap off the board and test it and see what you get?
Or get the same set of caps and connect them in parallel just like what are on the board and take the reading and compare to what you get with the reading on the board.
Experiment, Experiment, Experiment to see what your test equipment can really do and understand what you are testing and understand the result.Last edited by budm; 09-08-2016, 10:03 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: P5PE-VM question ?
Ok...I'll do some experiments with parallel capacitors off the board ...and see the value...Comment
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Re: P5PE-VM question ?
I got -155.2 mOhm + j4484 mOhm for 2 1800uF brand new in parallel off circuit...
It might be the caps on mobo are ok...but...I'll desolder one of them anyway as you said...Comment
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Re: P5PE-VM question ?
if u change cap and mobo did not work you can check North bridge for disconnecting from board. you can push north bridge hit sink vertically by hand and starting motherboard. better you warm a little under north bridge by hitter before pressing north bridge.Comment
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Hi everyone,
Brought a non functionnal PS5. Apparently only a bad PSU...
No beep, nothing.
After some tests i found this :
- PSU is fine (12 volts stable)
- 12 volts line is shorted
- DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
- By the way, nothing change. No signal, no power, no beep.
Mesuring all rails with my workbench psu (12 volts input)
- 0.00 amp drawing
- 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is... -
Hello.
Have this ps5 pro EDM033 that came with damaged hdmi connector. i replace it and console works for few days but show hdmi problems when cold start. so cold joint. reflowed connector and decoder ic as i think he have cold joint. but now i have only one beep and no start. can heatdamage of this decoder ic prevent start?
i have ps5 repair guide but not ps5 pro so link me to it if u know it -
Hello team ,I a have ideapad 5 ,that has a weird issue ,it start up and does 2 beep ,and when I want to type password to login,keyboard doesn’t work ,check video
Lenovo ideapad 5 15are05
s/n: pf2hngt3... -
The motherboard does not POST and has the following symptoms:
When the power button is pressed, the fans and RGB turns on.
When the power button is pressed, the motherboard voltages 12, 5, and 3 are connected.
The motherboard does not beep.
None of the diagnostic LEDs light up.
USB voltage is off.
VCORE voltage is off.
The BIOS software was downloaded from Asus site and installed using the Q FLASH button, but it made no difference.
I would appreciate it if anyone could guide me on the cause of the problem.
Comment