Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!uunet!motcid!kraus From: kraus@cell.mot.COM (David Kraus) Newsgroups: comp.sys.ibm.pc Subject: Re: 286 CMOS RAm and batteries... Keywords: Leading Edge D2 and model D Message-ID: <573@grape2.UUCP> Date: 15 Dec 89 23:01:13 GMT References: <6197@wpi.wpi.edu> <7026@chaph.usc.edu> <270@fortytwo.UUCP> Distribution: na Organization: Motorola Inc. - Cellular Infrastructure Div., Arlington Heights, IL 60004 Lines: 41 In article <270@fortytwo.UUCP> tim@fortytwo.UUCP (Tim Baker) writes: >In article <7026@chaph.usc.edu> dchun@aludra.usc.edu (Dale Chun) writes: >>Does anyone out there in netland know what type and where to replace the >>battery in a Leading Edge D2? > >I have a LE Model D and I can't find the clock battery either. >I get the feeling that it charges from the AC but I cannot be sure. >I would invite anyone with intimate knowledge of this to post a >statement about LE batteries. (It's been a while since I worked on these, and since I'm at work I don't have access to my PC at present, so this is from memory. With that disclaimer in mind - ) The clock battery on an LE D is located at the far back edge of the motherboard, pretty much centered between the left and right sides. It looks like a little can placed on its side, and covered with a blue plastic. It's soldered between two flat leads coming out of the motherboard. Yes, it's charged from the motherboard, but only when the machine is running. I.e. I believe it charges off of either the 12V or 5V (5V most likely) lines. So, if your machine is brand-spanking new and hasn't been burnt in yet, or it's been off for a few months, your clock can lose time or go away completely. Just leave the machine running for a day, and the battery will get recharged. If you're absolutely sure it's shot, you'll have to desolder it from the motherboard leads, find another battery like it, and resolder or otherwise connect it. Completely dead batteries on a D were rare as of about a year ago (when I was playing technician on them). My machine is about 4 years old (first revision D motherboard) and has had no problems with the battery or anything else. As far as the D2, I _think_ it has a 'button' lithium battery on the motherboard about the size of a quarter. I didn't rip those apart as much as the Ds (nor do I own a D2) and I was also working on several types of AT-clone at the time, so I can't be sure about any D2 or D3 information..... -- =============================================================================== Dave Kraus UUCP: ...!uunet!motcid!kraus Motorola Cellular Infrastructure Division FidoNet: 115/444.11 ===============================================================================