OESF Portables Forum

Everything Else => Sharp Zaurus => Model Specific Forums => Distros, Development, and Model Specific Forums => Archived Forums => Cxx0 Hardware => Topic started by: thseiler on April 25, 2005, 12:25:22 pm

Title: Mysterious Contacts Besides The Battery
Post by: thseiler on April 25, 2005, 12:25:22 pm: Hi

If I open the Battery compartiment of my SL-C760, I can see 6 contacs, just beside the battery.
Does anyone know what these contacts are used for and what they have for a pinout ?

Thanks
Thomas
Title: Mysterious Contacts Besides The Battery
Post by: kahm on April 25, 2005, 12:30:28 pm: I think that's for the mysterious "JTAG" support, which is an industrial diagnostics standard.

I suspect that it isn't much use to home hobbyists.
Title: Mysterious Contacts Besides The Battery
Post by: thseiler on April 25, 2005, 01:12:07 pm: Quote
I think that's for the mysterious "JTAG" support, which is an industrial diagnostics standard.

I hoped it would be a kind of serial port (I thought that JTAG had 7 signals + GND, hasn't it ?)

Quote
I suspect that it isn't much use to home hobbyists.

Sigh, yes it isn't. A Serial Port OTOH would be...
I have just found about a bluetooth module supporting H4 (3,3volt level), fitting in the space between the white battery cover and the SL-c760 and, best its available in single quantities. To bad..

Anyway thanks for clarifiying this.
Thomas
Title: Mysterious Contacts Besides The Battery
Post by: TRIsoft on April 25, 2005, 03:52:29 pm: Hi everyone,

the contact pads are no secret i/o stuff, it's called
a checkpad and we know it since the SL-5000.

[ You are not allowed to view attachments ]

The JTAG interface is included via the SHARP I/O port:

[ You are not allowed to view attachments ]

The JTAG cable should be available via SHARP parts
service. The part # is : OIU-PLGWB9727

Both pictures taken from SHARPs technical documentation.
It's available under the part# 00ZSL5500SM/E . This is
the service manual for the SL-5500 series. I don't know
how it's in the US, here in Europe all tech information is
available for everyone (OK, you have to pay for it).

///TRIsoft

Marc Stephan
Title: Mysterious Contacts Besides The Battery
Post by: thseiler on April 27, 2005, 04:22:10 pm: Hi Mr. Stephan

Quote
the contact pads are no secret i/o stuff, it's called
a checkpad and we know it since the SL-5000.

Ok, so these are only checkpads for the voltage regulators. Thanks for the info.
Do you think one can draw a few (~60) milliamps of power from these contacts ?

Best Regards
Thomas

BTW: Thank you for the nice repair work on my C760. Its like new !
Title: Mysterious Contacts Besides The Battery
Post by: Hrw on May 05, 2005, 04:33:02 pm: Quote
This is the service manual for the SL-5500 series. I don't know how it's in the US, here in Europe all tech information is available for everyone (OK, you have to pay for it).
[div align=\"right\"][a href=\"index.php?act=findpost&pid=76800\"][{POST_SNAPBACK}][/a][/div]

How much for it?
Title: Mysterious Contacts Besides The Battery
Post by: TRIsoft on May 05, 2005, 05:54:46 pm: Quote
How much for it? Maybe that help with writing 2.6 kernel for collie...
[div align=\"right\"][{POST_SNAPBACK}][/a][/div] (http://index.php?act=findpost&pid=78424\")
Hrw,
i don't know what they will charge for.
It's available online for free for SHARP service
dealers via the intranet.
Enduser source for documentations here in Germany is:

Lange oHG
Schaltungsdienst
Zehrensdorfer StraÃŸe 11

D - 12277 Berlin
[a href=\"http://www.schaltungsdienst.de/gb/index.html]English homepage[/url]

Normally it's between 10-20 EUR.

@Thomas: Sorry, haven't noticed your question.
I wouldn't use these contacts to power anything.
We also don't have documentation about the
SL-C760, but experience shows that SHARP will
not make big changes if something established.
So we could expect that the pads will work like
in the previous models.

///TRIsoft

Marc Stephan