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- Unusual RS232C connector on Tatung tablet, TWN-5213 CU. - 5 Updates
- Phone headset buzz - 1 Update
- Fan causing MW RFI - 2 Updates
| Michael Black <et472@ncf.ca>: Nov 27 12:37PM -0500 |
| Peter Easthope <petereasthope@gmail.com>: Nov 27 07:49PM -0800 On Thursday, November 27, 2014 6:21:37 AM UTC-8, Maynard A. Philbrook Jr. wrote: > The more I think about it, being a tablet and all, I would bet that > it's the connector for the docking station. The photo now shows the cover as well as the connector. http://carnot.yi.org/TatungTWN5213RS232.png Also the machine is illustrated here. http://www.akori.fr/webpad_galerie.html RS232 is marked. The peculiar "odd connector-DE9 subminiature" is in this picture. http://www.akori.fr/webpad_solutions.html No doubt the function is RS232. I only wonder who made the connector. Thanks for the replies, ... Peter E. |
| Peter Easthope <petereasthope@gmail.com>: Nov 27 08:06PM -0800 On Thursday, November 27, 2014 7:49:27 PM UTC-8, Peter Easthope wrote: > Also the machine is illustrated here. > http://www.akori.fr/webpad_galerie.html > RS232 is marked. P.s. This TWN-5213 is illustrated here. http://www.akori.fr/eng_webpad_twn.html The TX3000 is a similar model. http://www.akori.fr/eng_tab.html Regards, ... Peter E. |
| Peter Easthope <petereasthope@gmail.com>: Nov 28 05:04AM -0800 On Wednesday, November 26, 2014 8:28:41 PM UTC-8, Peter Easthope wrote: > Can anyone ID this connector? I've never seen another and haven't found it in Google Images. It's in the Hirose 3500 series. http://www.hirose-connectors.com/connectors/H203SeriesCategorySearch.aspx?cat=02 The Hirose 3540-16P-CV should mate and Digikey offers it. http://www.digikey.ca/product-detail/en/3540-16P-CV%2850%29/H11353-ND/1095670 On some models, 16 positions allowed 4 connections for Ethernet and 7 or so for RS-232. That's why the RS-232 cable and the Ethernet cables could have the same connector on one end. With the back off the machine, I might find the pinout. Any further tips are welcome. Thanks, ... Peter E. |
| "Uffe Bærentsen" <leiti_FJERNES_@hotmail.com>: Nov 28 05:08PM +0100 Den 28-11-2014 14:04, Peter Easthope skrev: > http://www.digikey.ca/product-detail/en/3540-16P-CV%2850%29/H11353-ND/1095670 > On some models, 16 positions allowed 4 connections for Ethernet and 7 or so for RS-232. That's why the RS-232 cable and the Ethernet cables could have the same connector on one end. With the back off the machine, I might find the pinout. > Any further tips are welcome. Using a voltmeter and an oscilloscope and measure on the pins - that might help identifying some of the pins. -- Uffe |
| vjp2.at@at.BioStrategist.dot.dot.com: Nov 28 12:19PM What causes a buzz/hum on my land line phone? Interference? Details: I got like four dozen fifty cent 2.5mm mono universal headsets a decade ago. (all my phones have a plug for them, except the new smarphones) On some occassions I get a buzzzing background sound, maybe mor elike a hum. On those occassions, using a fancier headphone eliminates the sound. Could the phone voltage be dropping because of the weather? One other suspect is a rechargeable DVD player nearby. Heater? Neigbor's equipment? Is it possible the magnets on the headsets are fading? Any ideas? - = - Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist http://www.panix.com/~vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Urb sprawl confounds terror] [Phooey on GUI: Windows for subprime Bimbos] |
| Jeff Layman <JMLayman@invalid.invalid>: Nov 27 04:48PM On 26/11/2014 11:15, Phil Allison wrote: > operating from a SMPS - all crammed into the same housing. > Why one would run in the wrong direction before correcting itself is > a tad mysterious. Puzzled me too so I Googled for the explanation. I have no idea if it is accurate, but see the final paragraph in this section: https://en.wikipedia.org/wiki/Brushless_DC_electric_motor#Controller_implementations > protection as FM and TV reception does - so things like SMPSs and > motor drives are permitted interfere somewhat with AM receivers in > the same premises. I don't know if it is. It should fall within Directive 2004/108/EC, but it isn't CE marked, and compliance with that Directive isn't mentioned in the manual. > Is the fan motor in a plastic enclosure ? > A grounded, metal one would be far better at supressing AM band > noise. I think it is plastic. Anyway, I was able to try a few things today, and the interference has been reduced to almost zero. Firstly, the earth appears OK. Just in case, I connected another earth lead to a known good earth, but it made no difference. Next I fitted the delta filter, which suppressed the interference almost completely - result! Next I pulled the power connector plug apart and wound the lead a couple of times through a large ferrite ring (the only one I could get easily), and that cut out almost completely what little noise was left. There is slight interference when the fan is running at full speed, but I never use it at that. speed. So that's a good result without dismantling and returning the fan - thanks. But here's something odd I found on the way. I got the MW on the mains-wired radio in the conservatory working pretty well with only a metre of wire connected as an aerial. It wasn't bad, but a bit quiet. Well, the signal was weak. Fair enough in the metal conservatory. But that was with the fan power connector unplugged (for fitting the ferrite ring). As soon as put the power connector back together, so I could run the fan (this is with the main power still disconnected at the wall switch), the radio reception improved tremendously - loud and clear! When I pulled the connector it went back to fairly quiet again. Weird - something is acting as an aerial, but how? -- Jeff |
| junebug1701 <junebug1701@gmail.com>: Nov 28 12:08AM -0800 On Monday, November 24, 2014 10:15:12 AM UTC-6, N_Cook wrote: > Pioneer must be embarassed , its first domestic product. > Hardboard deck and no electonics , relied on the old telephone carbon > granules principle to feed a speaker, seriously tinny and tiny The nerve of them to put Hawaii on the box, after what they did to Pearl Harbor! |
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