>A possible bug is a shorted DS9503 protective diode in the device. This >happens after static overvoltage on the bus line, e.g. wrongly connected >+12V to 1W. Static discharge is unlikely, the diode is designed to >survive a short peak.
>Open the DS9450 (TX5 screw under the label, two clips at the side of the >RJ12 connector. When the device is opened, RJ12 connector facing you, >it's one of the 6-pin chips on the right. Check the right two pins of >either side (front, back) for shortage. If they are shorted, the chip is >fried. De-solder it and put another one onto the board. Or fiddle with >wires (read the DS9503 datasheet!) if you don't have a replacement part >and want to go without the protection diode from now on. CHECK YOUR CABLING! Big thanks for the reply! I opened DS9490R and check pins for shortage. There is no shortage. DS9490R was corrupted after host with it lost power supply several times. Also i test 1 and 2 , 6 and 5 pins of DS9503 - there is no shortage too. what can i do to test more? Big thanks! -- View this message in context: http://owfs-developers.1086194.n5.nabble.com/DS9490R-1-wire-bus-short-circuit-tp10564p10566.html Sent from the OWFS Developers mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Put Bad Developers to Shame Dominate Development with Jenkins Continuous Integration Continuously Automate Build, Test & Deployment Start a new project now. Try Jenkins in the cloud. http://p.sf.net/sfu/13600_Cloudbees _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
