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N_Cook <diverse@tcp.co.uk>: Mar 10 03:09PM On 05/03/2018 08:35, N_Cook wrote: >> Still doing proper radio-controlled timing, without any intrusion from >> me, despite some of the coldest days for some years.   > Change of title, just noticed its Wave Ceptor   It reset to 2005 yesterday, so I went inside. Removed battery and delved deeper. Safely got to both sides of the pcb , one SMD had about 200mV on it with no battery supply. Have to find more technical info on all this

marty <m@m.org>: Mar 10 06:28PM +1100 On 02/05/17 10:09, Phil Allison wrote:   > ** WD40 is excellent at making bad contacts good again.   > Switches, connectors and pots are all examples.   > .... Phil   Last week I fixed a small pot on headphones with WD40. Works perfectly now. The only problem was applying a small enough dose. Thanks for the info.

avagadro7@gmail.com: Mar 10 05:58AM -0800 CRC ELECTRICAL CLEANER

Jeff Layman <jmlayman@invalid.invalid>: Mar 10 01:00PM On 06/03/18 15:44, Jeff Layman wrote:   > *Many years ago I had to replace a SMPS chip on a Panasonic DVD recorder > (DMR-E55) because they'd skimped on a heatsink. A new chip and a decent > piece of aluminium solved the problem.   I had a closer look at the user guide (shared DMR-HWT130 and 230) and found the following: "• DMR-HWT130 does not have a cooling fan. Instead, it has ventilation holes."   All the pics in the manual are for the HWT230. I found a service manual offered on Ebay: <https://www.ebay.co.uk/itm/Panasonic-DMR-HWT130-HWT230-HDD-Recorder-Service-Manual-/232056349381>   But the model shown is *not*what I have. I assume the US version is different. That one has scart sockets and a load of other sockets on the back at the right. It also has an obvious "bolt-on" fan.   Is it usual for equipment with identical model numbers to be so different in different parts of the world?   --   Jeff

KSMike1 <mike.fairleigh@gmail.com>: Mar 09 04:23PM -0800 > Archer A/V mixer. Archer Model: 15-1263.   > Radioshack.com dont seem to have any links ot their manuals. Where do > they hide them?   If you still need the one for 15-1263, send me an e-mail. I found my original this afternoon and scanned it.

jurb6006@gmail.com: Mar 09 06:31PM -0800 I have an Archer surround decoder and amp model 15-1279. It needs both output chips. I probably don't really need the manual, maybe the output part is all, but not the whole thing, what I need is the part numbers of the output chips. They are both blown to bits. (that's why I might need that part of the manual)   The reason for this is my own carelessness. I was using it as a bench amp, it is small, not much tone control and can null felt and right to check channel balance. (which actually proved useful once) I have sort of a patch bay there for the speakers, and really the receiver that is now there is better, but when the Archer was there I went to check an amplifier.   Well this was a quite powerful amp, not sure it may have been my Phase Linear 400-2, 260 WPC. Instead of disconnecting the speakers and hooking them to the amp I mistakenly fed the output of the amp into the speaker outputs of the Archer, which was of course in BTL mode so all the channels are fried.   A great big OOPS. Even the part number would be good, then I can check see if it didn't burn down alot more before I order the chips.

tabbypurr@gmail.com: Mar 09 09:15AM -0800 > Taking things out of context and in what appears to be complete ignorance of historical conditions and facts generally not a good practice.   > Peter Wieck > Melrose Park, PA   I think you'll find that extract applied to everyone, and still does.     NT

"pfjw@aol.com" <peterwieck33@gmail.com>: Mar 09 09:38AM -0800 > I think you'll find that extract applied to everyone, and still does.   I do not think so. "Freeman" was a specific term-of-art at the time (the Latin liber homo) meaning an individual unencumbered by servitude or obligations to a lord or land-owner. NOT a serf (Villien), House-Serf (Bordar) or slave. Freemen could own land, farm it in their own right, 'own' villiens, even Bordars and slaves. Villiens, Bordars or slaves could not and were obligated to their lords.   A Villien was, by definition, not free, but a Freeman could descend into Villieny by loss-of-land or position.   The Magna-Carta as a great emancipation document is wishful thinking. It was a brilliant move by Henry III to define, solidify and enhance his power by seeming to give up something he did not want and did not affect him in any case. Latter day interpretations are much as latter-day interpretations of the US Constitution - as justifications for laws and behaviors that would have evolved in any case and/or would be self-evident were issues of politics, race, class and religion not contaminating human behavior.   Note that Henry lasted 52 years after the latest version of the MC was signed (by him) in 1225. A long time, indeed.   Peter Wieck Melrose Park, PA

tabbypurr@gmail.com: Mar 09 11:23AM -0800 > Note that Henry lasted 52 years after the latest version of the MC was signed (by him) in 1225. A long time, indeed.   > Peter Wieck > Melrose Park, PA   Most of us are today freemen.

"pfjw@aol.com" <peterwieck33@gmail.com>: Mar 09 11:59AM -0800 > > Peter Wieck > > Melrose Park, PA   > Most of us are today freemen.   800 years later, that remains debatable. But, under the law-as-an-ideal, sure. As-practiced, not so much unless one is a white male, reasonably well-off and a property owner that votes. As to that latter, and votes per the instructions of the inimitable Alphonse Gabriel Capone - early and often.   Peter Wieck Melrose Park, PA

Jeff Liebermann <jeffl@cruzio.com>: Mar 09 12:18PM -0800 >> codified constitution. The others are Britain and New Zealand.   >We (UK) have the Magna Carta. While its provisions are few, one of them is more than a little important. >NT   That's not a constitution. It's like saying the 613 commandments are the constitution of Israel. <https://en.wikipedia.org/wiki/613_commandments>   This might be closer to the mark for England: <https://www.bl.uk/magna-carta/articles/britains-unwritten-constitution> <https://en.wikipedia.org/wiki/Constitution_of_the_United_Kingdom>   "Let it be un-written, so let it be un-done." (Apologies to C.B. DeMille and his version of the 10 Commandments).   -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

"pfjw@aol.com" <peterwieck33@gmail.com>: Mar 09 12:28PM -0800 The advantage of an unwritten Constitution is that it allows multiple parties to be Right.   The advantage to English Law is that it allows multiple parties and opinions to coexist as it requires compromise in order to function at all.   The disadvantage to both the above is that the are remarkably sloppy and remarkably disorganized. Brits "muddle through" for good reason. But, muddle they do.   Peter Wieck Melrose Park, PA

Jeff Liebermann <jeffl@cruzio.com>: Mar 09 12:55PM -0800 On Fri, 9 Mar 2018 12:28:53 -0800 (PST), "pfjw@aol.com"   >The disadvantage to both the above is that the are >remarkably sloppy and remarkably disorganized. Brits >"muddle through" for good reason. But, muddle they do.   Israel did it's best to copy all the mistakes and disadvantages of the British parliamentary system in 1948. For example, Britain has 650 members of parliament and about 10 active political parties. <http://www.parliament.uk/mps-lords-and-offices/mps/current-state-of-the-parties/> The Israeli Knesset has 120 seats, 17 parties with seats, and a huge number of minor parties that appear and disappear as the crisis of the day warrants. <https://en.wikipedia.org/wiki/List_of_political_parties_in_Israel> Anything worth doing is worth over-doing. Perhaps if Israel increases the number of seats in the Knesset, the number of parties might decrease?   Fortunately, there are better ways to settle disagreements available to middle east politicians: "Jordan MP challenges firebrand Israeli MK to a duel" <https://www.timesofisrael.com/jordan-mp-challenges-firebrand-israeli-lawmaker-to-duel/>   -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann <jeffl@cruzio.com>: Mar 09 01:10PM -0800 On Fri, 09 Mar 2018 12:55:52 -0800, Jeff Liebermann <jeffl@cruzio.com> wrote:   >to middle east politicians: >"Jordan MP challenges firebrand Israeli MK to a duel" ><https://www.timesofisrael.com/jordan-mp-challenges-firebrand-israeli-lawmaker-to-duel/>   Incidentally, Israel has been debating the merits of having or not having a written constitution since 1950. <https://www.knesset.gov.il/description/eng/eng_mimshal_hoka.htm> <https://en.wikipedia.org/wiki/Constitution_of_Israel> 70 successful years without a written constitution seems to indicate that the situation will be permanent. Sorry, but no duels are currently scheduled in order to settle the matter.   -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

tabbypurr@gmail.com: Mar 09 04:26PM -0800 On Friday, 9 March 2018 20:18:40 UTC, Jeff Liebermann wrote:   > >We (UK) have the Magna Carta. While its provisions are few, one of them is more than a little important. > >NT   > That's not a constitution.   sure it is. It may only have one useful provision, but it's the most important one possible, and is the legal & human rights foundation on which modern Britain exists.     NT

tabbypurr@gmail.com: Mar 09 09:19AM -0800 On Friday, 9 March 2018 15:44:38 UTC, Pimpom wrote: > 3) DIM PWM signal /from/ the logic board   > The inverter does not turn off by itself. It's turned off when > the ENA signal from the logic board stops.   yes, so overriding the ENA signal will not affect safety. What it would affect is the screen shutting off when pc video card stops sending signal, one would need to use the on/off switch more.     NT

Pimpom <Pimpom@invalid.invalid>: Mar 09 11:41PM +0530 >> The inverter does not turn off by itself. It's turned off when >> the ENA signal from the logic board stops.   > yes, so overriding the ENA signal will not affect safety. What it would affect is the screen shutting off when pc video card stops sending signal, one would need to use the on/off switch more.   I know. I'd considered that possibility but I hate band-aid solutions except as a last resort.   It seems clear to me that the problem is on the control board. I was hoping that someone would know about it and can offer a solution.   I've drawn a block diagram of the boards. Here - https://www.dropbox.com/s/ndpbl8uohpnq4p0/BenQ%20G2420HD.png?dl=0

Terry Schwartz <tschw10117@aol.com>: Mar 09 12:14PM -0800 Are you certain there is no feedback? I've seen systems where the load driver, if overloaded, can truncate the PWM pulse from the low level driver circuitry and that circuit can sense it. Might want to put a scope on the enable and dim lines and see if anything like that is going on.

tabbypurr@gmail.com: Mar 09 12:18PM -0800 On Friday, 9 March 2018 18:11:56 UTC, Pimpom wrote: > was hoping that someone would know about it and can offer a solution.   > I've drawn a block diagram of the boards. Here - > https://www.dropbox.com/s/ndpbl8uohpnq4p0/BenQ%20G2420HD.png?dl=0   It's not a fault I've ever fixed. I've no clue whether you can trace that line backward to see where it starts to get flakey. I'm guessing it just goes straight into a huge chip though. And if Terry is correct that might not be the solution.     NT

Terry Schwartz <tschw10117@aol.com>: Mar 09 12:30PM -0800 On Friday, March 9, 2018 at 7:44:56 AM UTC-6, Pimpom wrote:   > 6. The control board doesn't have obvious cracks, burn marks or > bulging capacitors.   > Any help will be greatly appreciated.   Comprehensive service manual here: http://monitor.espec.ws/files/10ff1c456904788e42f979cab329aa8b_562.pdf

Pimpom <Pimpom@invalid.invalid>: Mar 10 02:24AM +0530 On 3/10/2018 1:44 AM, Terry Schwartz wrote: > Are you certain there is no feedback? I've seen systems where the load driver, if overloaded, can truncate the PWM pulse from the low level driver circuitry and that circuit can sense it. Might want to put a scope on the enable and dim lines and see if anything like that is going on.   It's 2 am here now and I'm getting ready for bed. I don't know if I'll have time to some more checking tomorrow. If not, it'll have to wait for Monday.   I'm certain that the two lines coming from the control board go to pins 13 and 16 of the inverter control IC OZ9933 via a few passives. These are the DIM PWM and ENABLE pins respectively. The tracks are easy to trace on the single-sided PCB and they are the only lines of connection with the control board (except for the 5V supply and GND).   I downloaded the service manual a few days ago. But while it's quite detailed about some things, it's sketchy about others or entirely omits them. Same thing for the schematic.

Pimpom <Pimpom@invalid.invalid>: Mar 10 02:26AM +0530 On 3/10/2018 2:00 AM, Terry Schwartz wrote: >> bulging capacitors.   >> Any help will be greatly appreciated.   > Comprehensive service manual here: http://monitor.espec.ws/files/10ff1c456904788e42f979cab329aa8b_562.pdf   I already have that. See my reply to your other post.

tabbypurr@gmail.com: Mar 09 09:15AM -0800 > Mid range woofer is a 'mid range driver' was the speaker of paper cone under the tweeter ?   we have surely been trolled

avagadro7@gmail.com: Mar 09 09:54AM -0800 Offering the question a different , what reliable companies and what price range at $300 speakers/150 amp (200 in front)   At 2008 dollars   Produce today's rear system upgrade

"pfjw@aol.com" <peterwieck33@gmail.com>: Mar 09 10:17AM -0800 Parts Express.   Something for every budget and skill-level.   https://www.parts-express.com/

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