Rockbox mail archiveSubject: Broken JBR - Searching for SMD Value
Broken JBR - Searching for SMD Value
From: Matthias Klumpp <Matthias.Klumpp_at_gmx.de>
Date: Mon, 25 Apr 2005 19:59:19 +0200
a friend of mine brought me a broken JBR V1, that has the following mal function
- Rockbox daily build 11.04.2004 flashed
- 2100mAh NiMH batteries are new, tested and ok
- Player is working perfectly, while running on battery power
- With original Archos power adapter plugged in:
-> the keys are not working
-> display data (e.g. running time in song, system time etc.) is not updated
-> batteries are not charged at all
-> power adapter symbol in display is shown
-> JBR is switching on in car adapter mode
I already soldered the battery connectors as shown in:
-> no change of behaviour
While opening I found a burned SMD device near the DC in socket on the top side
of the display PCB.
I tried to mark the position in the following picture:
The original picture is taken from the Rockbox HP and does NOT exactly show my
type of JBR.
I tried to locate some devices in the JPG as I find them on my device.
The broken SMD device is the one marked with a red circle.
On the left side of the broken device, there is a "R47" labeled horizontal
device (resistor ??).
On the upper left side of the broken device, there is a "000" labeled vertical
device (0 Ohm resistor ??).
The broken device is also vertically mounted.
The JBR has the following numbers:
On the backside label:
- JBR 20 101
- S/N 031700205
On the display PCB:
- JUKEBOX REC MP3
- INTERFACE V2.1B
Does anybody have any ideas what kind of SMD device it might be ?
Any ideas if that device (when broken) can cause the a.m. symptoms ?
Any other ideas I could test to make that JBR run again ?
Many thanks to you all in advance :-)))
Received on 2005-04-25