Author Topic: C860 Charging Problem (not Battery)  (Read 64645 times)

seva

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C860 Charging Problem (not Battery)
« on: March 24, 2005, 11:31:26 am »
(This is going to sound like a lot of other posts, but read on for more details)

Recently I got my C-860 back from Sharp via Japan Direct, I wanted them to look at the CF port, which may or may not have had a problem, anyhow everything was working fine in regards to charging before that, but after I got it back I couldn't turn the Zaurus on.

I thought this was my battery, so I ordered a new one, Zaurus turned on.  After the battery discharged it wouldn't charge anymore, that's when I started looking on the forums about other similiar sounding problems.

I know there are a lot of people reporting problems charging, and have often found odd solutions, like flashing the current state of the battery into the D+M Batt Voltage Adjust menu.

However, it seems like I have a hardware issue, I measured voltage across positive and negative terminals on a normal Zaurus C-860 (my friend's) and mine; here's what I got:

Code: [Select]
Normal Zaurus:
    Charge off: 0.4V (or something close to that)
    Charge on: 4.2V

My Zaurus:
    Charge off: 3.0V
    Charge on: 2.5V
[/b]

What is going on here? Any suggestions? I don't really want to send it back to Japan, because last time it took 3 months?!

For the record, my new battery seems to be fine, when charged in my friend's Zaurus, I can use it just fine until it's drained.

Thanks for reading, as a bonus here's a picture of two C-860s side by side, click for a larger version:
[img]http://sevatech.com/tmp/zaurusi-thumb.jpg\" border=\"0\" class=\"linked-image\" /]

[span style=\'font-size:8pt;line-height:100%\']P.S. I meant to post this in the hardware sub-forum, mods feel free to move.[/span]
« Last Edit: March 24, 2005, 03:10:29 pm by seva »

cgrieves

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C860 Charging Problem (not Battery)
« Reply #1 on: May 19, 2005, 12:49:26 pm »
Seva did you ever have any luck getting your unit repaired or replaced??

seva

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C860 Charging Problem (not Battery)
« Reply #2 on: May 19, 2005, 12:51:49 pm »
Quote
Seva did you ever have any luck getting your unit repaired or replaced??
[div align=\"right\"][a href=\"index.php?act=findpost&pid=80550\"][{POST_SNAPBACK}][/a][/div]

No, I've been pretty annoyed by this and haven't sent it back yet.

I'll try today.

cgrieves

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C860 Charging Problem (not Battery)
« Reply #3 on: June 08, 2005, 05:48:15 am »
Quote
Quote
Seva did you ever have any luck getting your unit repaired or replaced??
[div align=\"right\"][a href=\"index.php?act=findpost&pid=80550\"][{POST_SNAPBACK}][/a][/div]

No, I've been pretty annoyed by this and haven't sent it back yet.

I'll try today.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=80551\"][{POST_SNAPBACK}][/a][/div]

OK just wanted to keep this thread alive. I have a friend who emigrated from the UK to Japan some years ago, and apparently his girlfriend is a bit of an ogre..... apparently she never keeps receipts or boxes for electronic good, and when something goes wrong with an item, she goes into the shop where she thinks she bought it, throws it at the assistant without box or receipt, does a bit of a strop, and 99% of the time gets the item replaced. Not very ethical I know, but I am going to ship my C860 over to her and get her to try it.

Worth a try.

I am also going to try and get some info on how to get in touch with Sharp Japan.

Let me know if you have any joy with yours!

tecks

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C860 Charging Problem (not Battery)
« Reply #4 on: June 08, 2005, 06:27:11 am »
What kind of power suppply do have? I've had a third party one and changed in a weak moment the polarity ...
It took only seconds to kill the charge modul......  

Ulli

omega

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C860 Charging Problem (not Battery)
« Reply #5 on: June 08, 2005, 06:48:24 am »
Quote
Normal Zaurus:
   Charge off: 0.4V (or something close to that)
   Charge on: 4.2V

I don't know what you were measuring, but battery voltage doesn't drop to 0.4 on a normal zaurus - the battery would have to be completely wrecked to have such a quick loss of charge...
Gorgeous C860, 256 Sandisk SD, 1Gig Pretec 40x CF, PDAIR leather case & the really cool retractable iPDA USB sync/charge cable. Powered by PDAXROM BETA 1.

My wish - to have a Command & Conquer style game on my Z! (FREECNC!!!) Simcity 2000 would also be great.

seva

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C860 Charging Problem (not Battery)
« Reply #6 on: June 08, 2005, 12:15:40 pm »
Quote
Quote
Normal Zaurus:
   Charge off: 0.4V (or something close to that)
   Charge on: 4.2V

I don't know what you were measuring, but battery voltage doesn't drop to 0.4 on a normal zaurus - the battery would have to be completely wrecked to have such a quick loss of charge...
[div align=\"right\"][a href=\"index.php?act=findpost&pid=83335\"][{POST_SNAPBACK}][/a][/div]

... thanks for reading before posting.

I was measuring the charging circuit not the voltage from the battery.

P.S. JapanDirect didn't even bother to reply when I asked them to help me fix the Zaurus (and sent them a link to this thread), you may want to keep that in mind when you consider whom to purchase your next toy from.
« Last Edit: June 08, 2005, 12:16:18 pm by seva »

maslovsky

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C860 Charging Problem (not Battery)
« Reply #7 on: June 08, 2005, 06:56:29 pm »
Code: [Select]
My Zaurus:
   Charge off: 3.0V
   Charge on: 2.5V

This is easily fixed by replacing a few capacitors. Afriend of mine did that a few times.

cgrieves

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C860 Charging Problem (not Battery)
« Reply #8 on: June 22, 2005, 08:23:24 am »
Quote
Code: [Select]
My Zaurus:
 Â  Charge off: 3.0V
 Â  Charge on: 2.5V

This is easily fixed by replacing a few capacitors. Afriend of mine did that a few times.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=83449\"][{POST_SNAPBACK}][/a][/div]

Whooooooaaaaaaaaa there cowboy!

I think this is the answer I am looking for.....

Maslovsky, my friend, my best friend....   Is there any chance you can get some more info on what caps we need to replace? I'm have access to decent solder/desolder gear so this might solve all my problems!

There's a reward in it for you (can't think what yet, but we'll think of something!)

Cheers!
« Last Edit: June 22, 2005, 08:42:05 am by cgrieves »

Boris

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C860 Charging Problem (not Battery)
« Reply #9 on: June 23, 2005, 12:15:27 am »
Quote
This is easily fixed by replacing a few capacitors.
Could you please elaborate a little bit more ?  Which capacitors ?  An electrolytic ones ? If they die in the normal operation modes then shame on Sharp  

maslovsky

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C860 Charging Problem (not Battery)
« Reply #10 on: July 11, 2005, 04:55:57 pm »
Sorry for some delay - my rfiend only recently found sometime to take my zaurus apart to try to fix fix sound problem. He told me he was going to take some picctures of the board and provide some instructions about what needs to be fixed for the charging problem...

edi800

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C860 Charging Problem (not Battery)
« Reply #11 on: July 12, 2005, 04:56:53 am »
Allright, cool - we are waiting :-)

cgrieves

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C860 Charging Problem (not Battery)
« Reply #12 on: August 04, 2005, 10:55:42 am »
Bump!

Don't want this thread to die!

maslovsky

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C860 Charging Problem (not Battery)
« Reply #13 on: August 04, 2005, 04:11:13 pm »
Sorry guys, the pictures will be avaiable soon. My frient went on vacation before I reminded him about the pictures...

bethanyb

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C860 Charging Problem (not Battery)
« Reply #14 on: August 11, 2005, 09:16:28 pm »
Quote
Sorry guys, the pictures will be avaiable soon. My frient went on vacation before I reminded him about the pictures...
[div align=\"right\"][a href=\"index.php?act=findpost&pid=90784\"][{POST_SNAPBACK}][/a][/div]


My c860 is not turning on.  I didn't think this to be a battery issue until I read your post.  Even when my Z is plugged into the wall outlet, it will not turn on.  Do you think that could still be a battery issue?
C860 with Cacko 1.23
iMac G5, syncing with ZMacSync