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| Thread ID: 84477 | 2007-11-07 03:26:00 | Phone fault? | beetle (243) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 609108 | 2007-11-12 01:50:00 | Deep cycling your car battery isn't gonna do it much good either | Agent_24 (57) | ||
| 609109 | 2007-11-12 02:26:00 | I think I have one of these phones, the Nokia 2112 – I had the previous model too ($99 from the warehouse). Both got the same issues, first they stopped vibrating when a text was received, then you get the intermittently turning off, it gets worse and worse (the stage I’m at with my current phone) and then my previous phone moved to turning off while texting, and the freezing more and more frequently. I don’t think it’s a battery issue at all, I think its ****e build quality that craps out after the warranty (clever engineering?). Still, im scared to spend $250 on a phone and have it do the same thing, so a new phone every 1.5 years isn’t too much of an issue, plus I have an extra spare battery with each phone I get :D |
Enigmur (10547) | ||
| 609110 | 2007-11-12 02:43:00 | So you are not familiar with the TV remote that does not work until you open the compartment and spin the battery/batteries? Will then work reliably for a couple of weeks until the contact/s - terminal/s go high resistance again and need another clean/spin. I never met a remote control (or carbon-zinc/alkaline/nicad/NiMh battery) with gold-plated contacts before, they are all nickel plated or worse, which is probably why that problem occurs. It doesn't change the circumstances for cellphones though, gold doesn't tarnish. Maybe you have cheap phones or aftermarket batteries. Cheers Billy 8-{) |
Billy T (70) | ||
| 609111 | 2007-11-12 09:07:00 | Billy T, In what seems like another life many moons ago when I used to work at Tait Electronics in the 70's, I helped build from scratch and then run a machine called the T.E.C.U.M.A.T. (Tait Electronics, Canterbury University Multiple ? Tester). It was an A.T.E. (Automatic Test Equipment) machine built exclusively for Taits using a National Pace uProcessor, the fastest at the time, round about 8MHz Cpu, lol, cutting edge technology at the time. This was a first in New Zealand and maybe the Southern Hemisphere. A major contributing factor to Tait's early success in manufacturing Radio Telephones to high standards in large numbers. I designed the power supplies for this machine, built them, and then put the main machine together and controlled the fault data feedback and co-ordination around the manufacturing area, together with day to day maintenance and writing new test routines for all the products we were building at the time. I also repaired and ran a similar machine called the Ferret which was damaged, so I was told, when Angus Tait carried it with him as he left the sinking Wahine in the well known disaster. The Ferret also had these reed switches in it and exhibited the same problem explained below. One of the major branches of this machine was approximately 600 magnetic reed switches, perhaps you know the type, RS Components (who I also used to work for in Africa, I was their sales representative in Zambia), Blue Reed Switches, vacuum sealed, gold contacts surrounded by a coil which when voltage was applied either opened or closed the switch depending on whether they were N.O. or N.C. or Changeover, we only used normally open in our application. They were rated for 250mA max I believe but we never ran more than 10mA and mostly far less around about 1uA up to 1mA was usual. After a month or two we started to get errors in the component values we were looking for measured through the reed contacts, which was eventually traced down to a build up of contact resistance in these switches. We fixed it by running a cleaning cycle which ran them sequentially at their rated current for a few seconds at the start of each test run to 'wipe' the contacts and clean them of whatever was causing the problem. Remember these were gold contacts in a vacuum of the highest quality and yet they still developed contact resistance after a time. After establishing this cleaning routine we never experienced the problem again. |
zqwerty (97) | ||
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