Rockbox Technical Forums

Third Party => Repairing and Upgrading Rockbox Capable Players => Topic started by: ajrock on November 02, 2004, 03:46:54 AM

Title: jb recorder 20 won't power off
Post by: ajrock on November 02, 2004, 03:46:54 AM
I have been unable to switch off my JB recorder 20Gb for two weeks now. I've tried everything I can think of -- changing batteries, leaving it on charge, leaving it unplugged in case the power connector switch has been stuck "on"...

Even if I remove the batteries and plug it in so that the Archos firmware comes up with the "battery charging" screen, I cannot get it to switch off.

It all started when the batteries ran down completely one day. I believe that the "Off" button is working because rockbox says "Battery Charging" when I hold it down and the power is plugged in.

Any ideas before I commit to surgery?
Title: Re: jb recorder 20 won't power off
Post by: LinusN on November 02, 2004, 04:11:26 AM
What happens when you hold the OFF button without the charger attached?

Nothing?
Does it turn off but immediately start again?
Does it say "battery charging"?
Title: Re: jb recorder 20 won't power off
Post by: ajrock on November 02, 2004, 05:16:37 AM
Nothing happens when I hold the "Off" button down and the charger is not plugged in. The only way to force a reboot is to remove the batteries.

If I leave it unplugged and the auto-power off setting is enabled, it will lock up after the power-off time. The screen stays frozen just the way it was, but nothing will respond until I unplug and remove the batteries.

Title: Re: jb recorder 20 won't power off
Post by: LinusN on November 02, 2004, 06:48:26 AM
Wow. It sounds like the power control circuitry is broken somehow. How about the ON button? Does it work normally?
Title: Re: jb recorder 20 won't power off
Post by: ajrock on November 03, 2004, 09:01:23 AM
Yes, the ON button seems to function normally.

It sounds like I'll have to commit to exploratory surgery and see if I can find out anything. I asked this question in the Archos Tech Support website, but I've had no response.

Thanks.
Title: Re: jb recorder 20 won't power off
Post by: starmanager on November 05, 2004, 02:41:48 AM
Hi, did you solder something on the board?
Title: Re: jb recorder 20 won't power off
Post by: ajrock on November 05, 2004, 11:45:28 AM
Nope, I've not opened it more than to change the batteries. I'll post back when/if I find a solution. Thanks for the help so far.

Title: Re: jb recorder 20 won't power off
Post by: starmanager on November 05, 2004, 12:55:54 PM
I think this is a short circurit behind the front board where it is soldered on the metall.  I had the same problem. I cleand  some solder away and it worked fine. So you better send it back for replacement or repair.