OESF Portables Forum

Model Specific Forums => Sharp Zaurus => Zaurus - Hardware discussion => Topic started by: Stefan_Wtal on February 01, 2020, 06:21:08 pm

Title: SL-C31000 / Strange switch
Post by: Stefan_Wtal on February 01, 2020, 06:21:08 pm
Hello All!

Another question regarding my new SL-C3100.
Please have a look at the device:
 

I never saw such a switch on a Zaurus before.
What might be the purpose of this switch?
Any ideas?

Rgds,
Stefan
Title: SL-C31000 / Strange switch
Post by: Varti on February 02, 2020, 04:07:32 am
No idea, I can at least say that there's no such switch on mine. I believe it's a custom switch.... maybe used for disabling the internal drive? Have you tried to use it?

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Varti
Title: SL-C31000 / Strange switch
Post by: Stefan_Wtal on February 04, 2020, 05:36:37 pm
The switch does not seem to do anything!
I tested memory/CF/SD/HDD/internal buzzer/external sound with service menu "D+M".
It does not make any difference; regardless the position of the switch.

Rgds,
Stefan
Title: SL-C31000 / Strange switch
Post by: greguu on February 07, 2020, 11:53:25 pm
Quote from: Stefan_Wtal
The switch does not seem to do anything!
I tested memory/CF/SD/HDD/internal buzzer/external sound with service menu "D+M".
It does not make any difference; regardless the position of the switch.

Rgds,
Stefan

Maybe a long shot, but the switch could be isolating the battery, allowing a hard reset without taking out the battery.Can you try to run the Zaurus while on battery only and then toggle the switch ?
If that is not it, maybe worth dismantling the Zaurus to see what it actually does, I am quite curious. There is a picture guide somewhere in this forum that shows all the steps.
Title: SL-C31000 / Strange switch
Post by: Varti on February 08, 2020, 03:29:46 am
Yes, it might be used for the battery, or it might be used for something else and it is now just broken

Varti
Title: SL-C31000 / Strange switch
Post by: Stefan_Wtal on February 15, 2020, 05:14:21 pm
Quote from: greguu
Maybe a long shot, but the switch could be isolating the battery, allowing a hard reset without taking out the battery.Can you try to run the Zaurus while on battery only and then toggle the switch ?
If that is not it, maybe worth dismantling the Zaurus to see what it actually does, I am quite curious. There is a picture guide somewhere in this forum that shows all the steps.
Zaurus is booting up into Kexecboot without PSU attached, regardless the position of the switch.
Maybe I will dismantle the device in the future, but for the moment I plan to install a system on it first.
This will also give a good chance to see what happens to the system when toggling the switch.

Rgds,
Stefan
Title: SL-C31000 / Strange switch
Post by: greguu on March 17, 2020, 03:26:16 am
Quote from: Stefan_Wtal
Quote from: greguu
Maybe a long shot, but the switch could be isolating the battery, allowing a hard reset without taking out the battery.Can you try to run the Zaurus while on battery only and then toggle the switch ?
If that is not it, maybe worth dismantling the Zaurus to see what it actually does, I am quite curious. There is a picture guide somewhere in this forum that shows all the steps.
Zaurus is booting up into Kexecboot without PSU attached, regardless the position of the switch.
Maybe I will dismantle the device in the future, but for the moment I plan to install a system on it first.
This will also give a good chance to see what happens to the system when toggling the switch.

Rgds,
Stefan
*We are still interested in what the switch does..
Title: SL-C31000 / Strange switch
Post by: greguu on April 09, 2020, 03:03:24 am
Quote from: greguu
Quote from: Stefan_Wtal
Quote from: greguu
Maybe a long shot, but the switch could be isolating the battery, allowing a hard reset without taking out the battery.Can you try to run the Zaurus while on battery only and then toggle the switch ?
If that is not it, maybe worth dismantling the Zaurus to see what it actually does, I am quite curious. There is a picture guide somewhere in this forum that shows all the steps.
Zaurus is booting up into Kexecboot without PSU attached, regardless the position of the switch.
Maybe I will dismantle the device in the future, but for the moment I plan to install a system on it first.
This will also give a good chance to see what happens to the system when toggling the switch.

Rgds,
Stefan
*We are still interested in what the switch does..


Any chance of pictures of the inside of the Zaurus ? There is a guide on this forum somewhere on how to dismantle the Zaurus.
Title: SL-C31000 / Strange switch
Post by: greguu on May 22, 2020, 03:25:46 am
Quote from: greguu
Quote from: greguu
Quote from: Stefan_Wtal
Quote from: greguu
Maybe a long shot, but the switch could be isolating the battery, allowing a hard reset without taking out the battery.Can you try to run the Zaurus while on battery only and then toggle the switch ?
If that is not it, maybe worth dismantling the Zaurus to see what it actually does, I am quite curious. There is a picture guide somewhere in this forum that shows all the steps.
Zaurus is booting up into Kexecboot without PSU attached, regardless the position of the switch.
Maybe I will dismantle the device in the future, but for the moment I plan to install a system on it first.
This will also give a good chance to see what happens to the system when toggling the switch.

Rgds,
Stefan
*We are still interested in what the switch does..


Any chance of pictures of the inside of the Zaurus ? There is a guide on this forum somewhere on how to dismantle the Zaurus.

bump
Title: SL-C31000 / Strange switch
Post by: Jay7 on June 10, 2020, 04:44:03 am
I saw ppl inserting similar switches to control custom soldered in USB bluetooth/wifi modules. So I'd say the only way to know is to dismantle it
Title: SL-C31000 / Strange switch
Post by: Varti on June 10, 2020, 06:47:15 am
Quote from: Jay7
I saw ppl inserting similar switches to control custom soldered in USB bluetooth/wifi modules. So I'd say the only way to know is to dismantle it
Yes, it might be that one.

Btw welcome! Although I have seen that you have registered here already 12 years ago  (Offtopic) Hope to meet you again on #kexecboot... I have seen ant doing some work on kexec recently.

Varti
Title: Re: SL-C31000 / Strange switch
Post by: DiTBho on January 30, 2021, 11:40:39 am
Is there any doc about these "hacks"? Soldered Bluetooth, etc
Title: Re: SL-C31000 / Strange switch
Post by: Varti on January 31, 2021, 12:05:11 pm
There's a page collecting all the findings about fitting an internal wiki/BT module here:

http://www.iral.com/~albertr/linux/zaurus/wireless/

This is the topic the page referres to:

https://www.oesf.org/forum/index.php?topic=13562.0

Maybe there's more info on the old wiki pages, I'll try to put them back online.

Varti
Title: Re: SL-C31000 / Strange switch
Post by: DiTBho on January 31, 2021, 12:39:51 pm
Thanks  :D