Attached for anyone else that needs it
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BigAlNZ
Senior Member
Last Activity: 09-10-2011, 09:05 PM
Joined: 03-28-2008
Location:
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Re: Probook 4510 - Schematics+Charging Pins
Attached for anyone else that needs it ...
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Re: Anyone reccomend a place to get schematics
Hey I think people need to give unlock dev some thanks!!Leave a comment:
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Probook 4510 - Schematics+Charging Pins
Hi All,
Got a probook 4510 that keeps killing batteries every few weeks, such that the battery looks good in all respects but wont discharge.
Firstly I think i need the schematics.
Secondly does anyone know what the correct voltages are for the battery charging pins on the motherboard? There is 6 pins. I get 3.3 volts on all but the left pin (GND) and right pin (1.98v).
Am happy 3.3v is ok, not sure if the 1.98v is correct?
Cheers
-Al -
Re: HP D530 Part Deux
No I replaced the mobo in the end. stj's suggestion is not bad, but it may be a bridge failure and youll need BGA gear to repair.
-Al...Leave a comment:
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Re: Proper MOSFET testing method
A even more thorough way of testing which I quote from sci.electronics.repair:
-Al...Leave a comment:
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Re: Power Controller IC on Mobo?
Yes - On/Off switch is fine.
There is no reset button, but the headers are present on the mobo. They are not shorted.
Which function?
Yup.
I have a ESR meter, I can pull em and test em I guess. They all look ok!
Thats a good idea - just tried it and they all seem ok.
Cheers
-Al...Leave a comment:
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Power Controller IC on Mobo?
Hi Guys,
I have got a mobo here that is dead. I have done all the usual stuff like trying new PSU, bench testing etc. Its dead - as in no fans, no nothing when you hit PWR button - PSU doesnt even come on.
I connected the ATX molex from the PSU and shorted Green (PWR ON) with GND on the molex and the PC came on. All seemed fine.
I think there is a IC on the motherboard between the PWR BTN headers from the power on switch and the ATX header on the mobo that tells PSU to start up.
I am trying to find this IC.
I have attached... -
Re: HP D530 Part Deux
I got another D530 PSU out of another D530 thinking initally the proble was the PSU. When the second D530 PSU didnt work I got a 3rd power supply I had lying around (but which I know to be good) and tried it. Both power supplies simply gave the +5vSB led blinking - so yes I have tried a standard ATX PSU.
The resistance between ATX power connector on motherboard for Purple pin and GND is in the order of 5 Ohm so not a dead short but very close!
Although it may not be the problem kc8adu can you make any comment on...Leave a comment:
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Re: HP D530 Part Deux
PS: Is it ok to test in circuit?Leave a comment:
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Re: HP D530 Part Deux
Tried to test MOSFETs using following procedure. The expected result from the instructions is in the brackets:
06N03LA
1) Use DVM in diode test position
2) Holding red lead on S
3) Black lead on D. Reading climbs to 557 after about 2-3 seconds. (Instructions say reading should be 500-800)
4) Put black lead on G. Reading is 13. (Instructions say should be open)
5) Hold black lead on S
6) Put red lead on D. Open Circuit (reading 1) (should be open?)
7) Put red lead on G. Reading 13 (should be open?)...Last edited by BigAlNZ; 08-14-2009, 11:47 PM.Leave a comment:
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Re: HP D530 Part Deux
Oh and I almost forgot these little suckers (look like mosfets to me) were on the bottom of the mobo underneath and near the VRM row of caps.
06N03LZ
AI423
They are seperate from the motherboard bottom plate by a large peice of rubber which had a slightly wet and semi sticky substance on it...I had wondered about this possibly creating a short when I first took the mobo out to bench test it.
Again, they look like MOSTFETs but not sure how to test? I have heard they often go shorted between...Leave a comment:
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Re: HP D530 Part Deux
Here are some pics of the moboif it helps?
The little square black things I think are MOSFET's are labelled:
06N03LA
AU417...Last edited by BigAlNZ; 08-14-2009, 11:03 PM.Leave a comment:
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Re: HP D530 Part Deux
Sure did with respect to the caps.
Ohmed the MOSFET's - can you explain a little more?
In circuit or out?
What legs?Leave a comment:
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HP D530 Part Deux
Well I tried a new power supply on the HP D530 that wont boot, no fans etc.
Still wont go. I noticed that the +5vSB led is flashing. Now apparently this means it wont start because the +5vSB is overloaded. I did a little test and noticed that there was virtually no resistance between GND and PURPLE (+5 SB) on the motherboard power ATX connector, in otherwords SHORT!
I have bench tested this motherboard and still same problem, so its not a case short. The caps look ok, but the D530's are known for bad caps.
So my question is this - could a symptom of... -
Hp D530 Sff Psu (pdp-124p)
Hi Guys,
Apparently HP D530 SFF power supplies are well known for dying when the glue used to hold the parts in place becomes conductive.
Although its not really economical to repair, I am doing it because, hey, its learning right?
There is a great page here [url]http://webdevsys.com/d530psuRepairNotes.htm[/url] on what parts are killed when these things go bang.
But in trying to learn I have come across more questions than answers, so I hope some of the helpful people here can steer me in the right direction.
1. Can you... -
Re: Atlas ESR60 - Low ESR Meter
OK, will have another go tonight. It wasnt a very thorough attempt at 6am this morning!
Also I have been told that a increase in ESR from the spec sheet value of 2x-10x is typical of a cap thats gone bad. Sounds about right?
IF this rule is true, then looking at the spec sheet tells me the ESR should be 0.023/0.038/0.041 (depending on the size) (spec sheet @ )
Now the cap I have is measuring 0.14 - easily more than twice the above values, and thus the cap is bad...IF the 2x-10x rule is...Leave a comment:
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Re: Atlas ESR60 - Low ESR Meter
Okay, but the method in terms of connecting probe to ESR clip, and GND on probe to other ESR clip sounds right?
Cheers
-Al...Leave a comment:
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Re: Atlas ESR60 - Low ESR Meter
PS: Whats your method for measuring with scope? I tried with the ESR meter connected to the probe and gnd clip, but when I press the test button the meter says open circuit or low capacitance so I am not sure if its putting the signal out?
-Al...Leave a comment:
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Re: Atlas ESR60 - Low ESR Meter
Hi Wizard,
I will do that. It says in the manual the output is 100Khz.
Interestingly I found the spec sheet for that OST, RLS series 6.3v 1500uf cap. The spec sheet says it should have ESR of about 0.02. Thus if its reading 0.13 it is about 7 times over its rated ESR...
Do I need to open this meter up to measure the output voltage?Leave a comment:
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Re: Atlas ESR60 - Low ESR Meter
PPS: I also note that when I tested this VRM cap in circuit the ESR value was 0 but asume thats because of other caps on the mobo which may be in parallel with it (though it wasnt in a line of caps).
-AlLeave a comment:
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