Server repair - SUN XSCF board and CMOS battery problems (PWJ176)

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How to repair a SUN M3000 XSCF board with memory errors? What's wrong with a CR2032 battery that has 3 volts but still don't work?
XSCF board is the remote control and management board of a couple of SUN systems. Other system management processors are called iLOM but have similar properties. HP calls it iLO...
CR2032 batteries are everywhere and sometimes they can really trick you. I tell you why...

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25 июл 2024

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Комментарии : 48

@Gooberslot 3 года назад

I got fooled by one of those coin cells once. It was a garage door opener that I thought was broken but it turned out it just needed a new battery even though the battery measured good. Now I know to put a load on batteries before measuring them.

@dtiydr 3 года назад

2:42 Wow that went fast, that board was thick!

@PlaywithJunk 3 года назад

yes but the solder pads are small...

@haralamc 3 года назад

Nearly all the time when I get a call about email and web browsing fault certificate errors, its down to failed cmos battery throwing the clock.

@LaserFur 3 года назад

6:45 I use a 1/2 inch wide double bevil tip to solder parts like those. I also tip the board up in the air to get the extra solder to flow down the tip since the tip points upwards as I move the tip downwards and solder all the pins at the same time. The flux removes surface tension and solder bridges remove themselves.

@douro20 3 года назад

I like to use BR coin cells on my mainboards...slightly lower capacity but better long-term stability. I have two HP business calculators and both of them are standard algebraic notation...I wonder why that is?

@gabest4 3 года назад

"These chips are not in sockets, that's rude" - Adrian's Digital Basement

@PlaywithJunk 3 года назад

most chips are not in sockets....

@gabest4 3 года назад

@@PlaywithJunk He repairs a lot of C64 and when he opens one he usually makes a remark about how many chips are in sockets. This video is the modern version of what he does.

@kf5tqnkf5tqn36 3 года назад

+1 That hot air nozzle is so perfect & sexy, it **must** be Swiss! +1 (if they'd let me) for being brave *hand soldering* those RAM chips. Then again, what else can one expect from a Swiss IT master? I freely admit I'd lay down a couple of nurdles of solder paste & hot-air solder the RAM, and give it multiple microscope inspections/

@PlaywithJunk 3 года назад

Those nozzles are indeed swiss made and they cost a small fortune each. The salesman told me that they tried to "outsource" the production but nobody was able to do it with the same quality. In fact, it's one old man who makes them from stainless steel.... they last for a lifetime. Thanks for the "IT master"... :-)

@douro20 3 года назад

I would hate to think how much that Leister hot-air station cost new. I've never seen solder packaged like that before...is it Stannol?

@hubzcaps 3 года назад

brughhh. oooooh sparc serv. sweet i dig it

@xenoxaos1 3 года назад

You could put a resistor between your probes to measure the coin cell under a slight load. I can't remember how much current the 2032 is supposed to put out under normal use so I can't remember a good value for the resistor.

@PlaywithJunk 3 года назад

I think a load of 10-20mA would be fine. That's 1/10 of the maximum current in this case. And it would clearly detect that faulty battery. So like 150 Ohm...?

@alexisfrjp 2 года назад

@@PlaywithJunk Clearly not, 10-20mA would drain your battery over a night. A 2032 has only around 200mAh... A normal load (basically only the RTC) in motherboard for such battery is

@PlaywithJunk 2 года назад

@@alexisfrjp I'm talking about testing the battery for a second or two. Not about connecting the resistor permanently....that would make no sense.

@alexisfrjp 2 года назад

@@PlaywithJunk sorry, misread :)

@PlaywithJunk 2 года назад

@@alexisfrjp ;-)

@melovescotch 3 года назад

Yep measure voltage, and then set to current and see short circuit in ma.

@PlaywithJunk 3 года назад

That's what I said....

@edditarigan8781 3 года назад

I tried to replace XSCF board and CMOS batteries but it didn't work such as 8:05 - 8:12 . Please your suggestion @Play with Junk

@Th3N3ll 3 года назад

i work in IT support and new mainboards last 5 jeas have some models the Error looks like a Death board ... the problem was the CR2032 after replacing all work

@chrisridesbicycles 3 года назад

Is this server really from 2009? Is it still in use?

@stvpls 3 года назад

who cares if its not new, as long as it works and it suits the job is used for no need to replace it

@PlaywithJunk 3 года назад

Yes.... some customers keep their stuff as long as possible. Thats not always easy to maintain but good for the planet :-)

@stvpls 3 года назад

@@PlaywithJunk agree, sometimes they get replaced for no reason even if they could do the job and were fully working

@benbaselet2026 3 года назад

We still run a bunch of V120&V240 sparcs from somewhere five years before that with no plan to replace.

@stvpls 3 года назад

@@benbaselet2026 awesome those machines are built to last, i hope they get proprely maintained (cleaning, paste ecc) if they get maintained they can run for annother 10 15 yrs no problem

@gglovato 3 года назад

interesting, you soldered it by hand, i would've thought you'd use solder paste and high heat low air to reflow it

@PlaywithJunk 3 года назад

It depends on the type of chip. This package is easy for hand solder.

@PlaywithJunk 3 года назад

...and my solder paste run out...

@gglovato 3 года назад

@@PlaywithJunk if you have a big microscope that is :D

@alexisfrjp 2 года назад

yes, without even flux

@dw1444 3 года назад

whats happpened to your voice i miss it

@stvpls 3 года назад

probably because there are coworkers around

@PlaywithJunk 3 года назад

I made that video at work. I don't want everyone to look at me when I'm talking... :-) I put my phone next to my workplace and nobody notices. And I like the style of "my mechanics"... he's never talking, you just hear the noises of work.

@kilrahvp 3 года назад

480p ? 😪

@PlaywithJunk 3 года назад

Yeah sorry.... I used my phone for this video.

@dtiydr 3 года назад

@@PlaywithJunk How old is you phone?!

@anonymouscoward9768 3 года назад

how much do you cost per hour??? just buy a new one.

@PlaywithJunk 3 года назад

OK.... So then, have fun finding one! If you find one tell me the price.... (SUN M3000 XSCF board) BTW that was an internal repair which means that I'm repairing it for our spares stock. There are always moments not so busy, when you have time to repair such things. What do you think how many business hours are spent drinking coffee and playing games? In my humble opinion it makes more sense to use those hours for something better.... like reducing the amount of waste!