OESF Portables Forum
Everything Else => Sharp Zaurus => Model Specific Forums => Distros, Development, and Model Specific Forums => Archived Forums => Cxx0 Hardware => Topic started by: louigi600 on March 13, 2007, 04:18:53 pm
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I've a C860 that no longer charges the battery.
It would be really handy if I had the schematic diagram to help me track down where the dammage is.
Anyone know where I can get it ... or even better can send me a copy ?
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hmmm, noone ever seems to have found a really detailed hardware schematic of the zauruses.
however, a number of people with charging problems have found that there's an internal protective fuse which can blow, and can be replaced with care. search forums for "fuse"?
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The schematics are in the service manuals, which sadly are not freely available.
That said, you don't need them in this case - the problem is all too common. Repair instructions are in this thread: https://www.oesf.org/forums/index.php?showtopic=11539 (https://www.oesf.org/forums/index.php?showtopic=11539)
...however it appears that the links are broken to the photos showing the location of the fuses.
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The schematics are in the service manuals, which sadly are not freely available.
That said, you don't need them in this case - the problem is all too common. Repair instructions are in this thread: https://www.oesf.org/forums/index.php?showtopic=11539 (https://www.oesf.org/forums/index.php?showtopic=11539)
...however it appears that the links are broken to the photos showing the location of the fuses.
[div align=\"right\"][{POST_SNAPBACK}][/a][/div] (http://index.php?act=findpost&pid=156189\")
[a href=\"http://cacko.oesf.org/downloads/fuses/Main%20protection%20fuse%20pic_1.jpg]http://cacko.oesf.org/downloads/fuses/Main...use%20pic_1.jpg[/url]
http://cacko.oesf.org/downloads/fuses/Char...use%20pic_2.jpg (http://cacko.oesf.org/downloads/fuses/Charging%20chip%20fuse%20pic_2.jpg)
It's a shame cacko.oesf.org has been down for awhile. (Actually since before Christmas '06, during the time the forums went down). There's a lot of useful stuff over there that seems to have vanished.
EDIT:
I just happen to have those two pictures in the links above.
(I like to save everything that's seems interesting or useful, that may also vanish because cyberspace is cyberspace)
I'll post them here, since offroadgeek increased the size limit for attachments.
Sorry, I cannot upload the pics to the forum, attachments stopped working again today.
They are sitting on my desktop if anyone wants them, you can wait until the forum attachments are fixed, or pm me with an email address. Total size of the two pics is 1.77MB
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If you email them to me I can putem up on ty.
antikx at gmail dot com
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just sent them
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I've a C860 that no lobger charges the battery.
It would be really handy if I had the schematic diagram to help me track down where the dammage is.
Anyone know where I can get it ... or even better can send me a copy ?
[div align=\"right\"][{POST_SNAPBACK}][/a][/div] (http://index.php?act=findpost&pid=156142\")
I notice from your signature that you're using r121 on your C860. I have the same issue as you, which is not a hardware problem, but a software problem with r121. See [a href=\"https://www.oesf.org/forums/index.php?showtopic=21490&st=45&p=142480&#entry142480]here[/url] for further information.
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I notice from your signature that you're using r121 on your C860. I have the same issue as you, which is not a hardware problem, but a software problem with r121. See here (https://www.oesf.org/forums/index.php?showtopic=21490&st=45&p=142480&#entry142480) for further information.
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In my case it's a hardware issue for sure because it worked untill I plugged power with polarity inverted ... and then it stopped working.
But I'm intrested to learn more about your software problem.
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I notice from your signature that you're using r121 on your C860. I have the same issue as you, which is not a hardware problem, but a software problem with r121. See here (https://www.oesf.org/forums/index.php?showtopic=21490&st=45&p=142480&#entry142480) for further information.
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In my case it's a hardware issue for sure because it worked untill I plugged power with polarity inverted ... and then it stopped working.
But I'm intrested to learn more about your software problem.
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I have the problem where pdaXrom r121 doesn't seem to recharge the battery, which stays at the same level even when power is supplied. kenya suggests a fix in post #54 on the page I linked to, with an updated apm ipkg, but that didn't seem to make any difference. For the time being, I'm recharging my SL-C860 battery in my unused SL-C5500, after filing off the sticking-out bit on the battery of course
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I have the problem where pdaXrom r121 doesn't seem to recharge the battery, which stays at the same level even when power is supplied. kenya suggests a fix in post #54 on the page I linked to, with an updated apm ipkg, but that didn't seem to make any difference. For the time being, I'm recharging my SL-C860 battery in my unused SL-C5500, after filing off the sticking-out bit on the battery of course
[div align=\"right\"][a href=\"index.php?act=findpost&pid=156223\"][{POST_SNAPBACK}][/a][/div]
Odd ... on mine it worked fine untill I made mints of fuses (I hope) .... if you use OZ or cacko does it charge the battery again ?
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Odd ... on mine it worked fine untill I made mints of fuses (I hope) .... if you use OZ or cacko does it charge the battery again ?
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[/quote]
It seems to be a known problem, see [a href=\"https://www.oesf.org/forums/index.php?showtopic=21490&st=73#]this report posted by iczer3 (http://index.php?act=findpost&pid=156229\"). Charging was working fine for me on rc12, which I used previously.
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just sent them
[div align=\"right\"][a href=\"index.php?act=findpost&pid=156209\"][{POST_SNAPBACK}][/a][/div]
Aww crud. Sorry Jon_J
I meant: tyrannozaurus at gmail dot com
I didn't snatch antikx@gmail.com fast enough and someone else took it. *sigh*
Please send again.
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It seems to be a known problem, see this report posted by iczer3 (https://www.oesf.org/forums/index.php?showtopic=21490&st=73#). Charging was working fine for me on rc12, which I used previously.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=156238\"][{POST_SNAPBACK}][/a][/div]
Well that never happened to me when my C860 was working correctly. I di run it down several times until it suspended for critical battery charge (and a few times I pushed it till it just froze).
Untill now it allways charged.
I've no idea, right now, why this is happening to some C860 devices, but I will look into it.
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posted:
http://www.tyrannozaurus.com/?q=wiki/ChargingCircuitC860 (http://www.tyrannozaurus.com/?q=wiki/ChargingCircuitC860)
Or browse to: http://www.tyrannozaurus.com (http://www.tyrannozaurus.com)
Click on Wiki -> ZaurusKnowledgeBase -> HardwareKnowledgebase -> ChargingCircuitC860
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FWIW, I've yet to have any problems charging my 860 on any ROM so far.
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however, a number of people with charging problems have found that there's an internal protective fuse which can blow, and can be replaced with care. search forums for "fuse"?
[div align=\"right\"][{POST_SNAPBACK}][/a][/div] (http://index.php?act=findpost&pid=156163\")
Thanx to all who contributed so far.
Yep I checked and I've the 0.63A fuse blown. The one on [a href=\"http://www.tyrannozaurus.com/files/ChargingChipFusePic_2.jpg]here[/url].
To get there one must open up Z and take out the mobo because that one in on the side facing the keyboard.
I hope I can find a replacement ... if anyone has any hints they are wellcome.
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Check the thread I originally mentioned; the photos are no longer available from it (you have those now) but the fuse availability stuff is still in there.
Quick guide - Koa Speer has them, unfortunately it's a coin-toss whether they'll actually respond to your sample order or just ignore you.
Farnell will sell small quantities (at vastly inflated prices) of 0.75A fuses in the right size, but they aren't ultra-fast-blow. I used one of those successfully; but I'm not sure if it's any better than a wire link. I'm *not* going to test it; my 860 is working
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Quick guide - Koa Speer has them, unfortunately it's a coin-toss whether they'll actually respond to your sample order or just ignore you.
They are free samples so you cannot complain .... same for mucrochip ... sometimes they ignore. But what the hell sometimes you can get 5 free pic microcontrollers.
Farnell will sell small quantities (at vastly inflated prices) of 0.75A fuses in the right size, but they aren't ultra-fast-blow. I used one of those successfully; but I'm not sure if it's any better than a wire link. I'm *not* going to test it; my 860 is working
No using non ultra fast blow fises is a no go. You risk damaging other ccomponents before the fuse blows. It's difficult enough replacing a 2 solder pad SMD component without propper soldering/desoldering station ... immagine what fun you can have soldering one of those chips with many pins all smaller in size that the solder pad of the resistors/capacitors/fuses.
I'd rather buy an external charger than try a wire bridge or a non ultra fast fuse.
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The SMD soldering is easy. Putting the Z back together is the hard part.
I don't know what the risk is for using a lower-specced fuse; it may still do the job fine, and it's better than never getting it fixed at all. I just opt for NOT reversing the polarity on my Z ever again; I've always got the time to test an unknown supply even when I don't
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The SMD soldering is easy. Putting the Z back together is the hard part.
Really for me opening and closing the C860, without leaving trace, is no big deal at all.
I've taken pictures and will put up a "tips n trics to opening Z Cxx0 without leaving trace" on my site. I've done it, for other reasons, on my C 760 and the case is the same (appart the colors). For me the nightmare is desoldering/soldering those 1.6x0.8 mm midgets ... so close to the other components too !!!
People are telling me that I can slide paper underneath the side I'm desoldeting. I'm unsure if it will work because the paper wil get partially burned with the heat and will become very fragile ... but I will try ... and make tests on scrap hardware first.
Any other tips and tricks for smd soldering/desoldering are wellcome.
I don't know what the risk is for using a lower-specced fuse; it may still do the job fine, and it's better than never getting it fixed at all.
Thanks to all the help comunity has given me I have confirmation that koaspeer will ship me free samples of the correct rating fuses ... just waiting for them to arrive
I just opt for NOT reversing the polarity on my Z ever again; I've always got the time to test an unknown supply even when I don't
It was not a matter of testing in my case:
I share the tip of a reversable polarity power supply with my extra external battery pack.
One day I just clumsily plugget the tip upside-down ... and there you go ...
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Any other tips and tricks for smd soldering/desoldering are wellcome.
Don't desolder the old fuse, since it's open-circuit anyway. Just piggyback the new fuse onto the old one.
It was not a matter of testing in my case:
I share the tip of a reversable polarity power supply with my extra external battery pack.
One day I just clumsily plugget the tip upside-down ... and there you go ...
That's pretty much how everyone does it, I think. No matter how sure I am about getting those tips right, if I unplug them and don't have time to get my multimeter out to test them again, I just don't use my Z on it. I fried a laptop and my Z in my car learning that the hard way; I eventually repaired both but I'm not going to be so lucky next time...
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I share the tip of a reversable polarity power supply with my extra external battery pack.
One day I just clumsily plugget the tip upside-down ... and there you go ...
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I bought a dedicated power supply for the Z. I didn't want the be sharing anything, because that might create the situation you encountered. And I glued the adapter tip on so that it wouldn't accidentally come off, which would provide me with the opportunity to reassemble it backwards. I used to use a multimeter to make sure the polarity was correct, but now that it's glued on I don't have to worry about it.
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The pictures and tips are up on my home page.
Click "Zaurus" on the left and "Z Service" on the top.
Still waiting for the samples to arrive ... I'll add a picture of the finished soldering job when I have it finished.
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one of the biggest problems with the tube connectors is that so many things use them, so you have to be sure when plugging in the Z that you haven't grabbed the wrong one!
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I got fed up waiting ....
anyone can send me a couple of those fuses ... or tell me where I can get one from my 5500 I'm willing to sacrifice untill I receive the samples ?
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Koaspeer sent me a wierd email this week from which I assume that I will never get the samples (although they did confirm at first that they would send).
Noboby actually answered my help request as to where to get such a fuse from my 5500 and nobody was able to send me a couple so that I could get going.
This is what I did: I desoldered from a broken MOBO the smallest fuses I could find.
I got a few fuses that are slightly bigger (around 2.0x0.8x0.6 LxWxH) but if you place them on the side they are become the same width as the 0603 package ... and just 0.4mm longer.
(the 0603 is package base footprint in inches 0.06 x 0.03 which is roughly 1.6 x 0.8 mm)
This way I was able to solder it over the burned one.
What is worrying me is that I'be no idea what the fuse rating is ... it could be anything from 0.5A to 3.5A and it could also be non fast blow: this means that I'll most likely run ito real trouble if I connect an inverted charger again. But on the other hand I got pissed off waiting.
Koaspeer have proven to be very unprofessional ... anyone else wanting samples would be better off ither buy small quantity at ilflated price or get samples from some other company.
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Your Z lives, I take it?
If so, congrats.
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Your Z lives, I take it?
If so, congrats.
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Yep ... it lives and charges again.