| jeff.panasuk@cfl.rr.com: Jun 29 02:02PM -0700 Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? |
| Sjouke Burry <burrynulnulfour@ppllaanneett.nnll>: Jun 29 11:31PM +0200 > Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? Spurious interference from modern light source? Some cheap ones produce a lot of garbage besides light. |
| John-Del <ohger1s@gmail.com>: Jun 29 03:32PM -0700 > Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? Did you try disabling the keyboard? |
| John-Del <ohger1s@gmail.com>: Jun 29 03:35PM -0700 > Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Wow, haven't seen one of these in decades. If this model has a manual on/off switch, check the reset circuit for the micro. |
| rickman <gnuarm@gmail.com>: Jun 29 11:14PM -0400 > Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? A friend had one of those big console TVs that would work, but there was something wrong with the controls, I don't recall just what exactly. I suggested he unplug the set for a while to let the caps drain off and the processor reset. It worked sure enough! I expect a power spike of some sort glitched the processor and it was working, but some variable was hosed messing up the operation. A clean reset got everything working right again. I guess that's not your problem. -- Rick C |
| Jon Elson <elson@pico-systems.com>: Jun 29 11:26PM -0500 > months or so, when I see it and think about it, I fire it up. Hate to > trash this old tv. Kind of part of the family now. Has anyone ever heard > of this before? Does it have channel up and channel down buttons on the panel? Since channel 2 is the lowest channel, if the channel down button was occasionally acting like it was pressed, it might end up at channel 2. I had a computer LCD monitor that had a soda splashed on the panel, and it got into the front panel button board, and it would work for months or days and then start flashing through the menus. Severe cleaning of the board with the buttons fixed it. Jon |
| tabbypurr@gmail.com: Jun 29 11:51PM -0700 > Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? Yes from neon channel selector sets, touch selectors & older pushbutton bar tuning sets. Show us the circuit. NT |
| John-Del <ohger1s@gmail.com>: Jun 30 04:29AM -0700 > > Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? > Yes from neon channel selector sets, touch selectors & older pushbutton bar tuning sets. Show us the circuit. > NT Hmmm... you're drudging up long forgotten memories. Back in the late 70s Zenith used a varactor tuned electronic tuner that used neons as indicators for the pre-set push button selector, and sometimes those neons were the cause of the TV jumping channels or refusing to engage a selected channel. By 1984 I would think that all manufacturers would be using a true digital selector system for anything no using a mechanical tuner. Unfortunately, OP didn't say if the TV would scan downward to channel 2 or jump to it. He also didn't say if the TV normally defaulted to channel 2 when the TV was powered off or when the AC was lost. There were a lot of TVs then that used a digital keypad, but were not remote control and used a mechanical AC switch and volume control. In this case, it's possible that the uPc is only used for channel functions and his problem could be on the micro's reset line. |
| tabbypurr@gmail.com: Jun 30 04:47AM -0700 On Friday, 30 June 2017 12:29:30 UTC+1, John-Del wrote: > By 1984 I would think that all manufacturers would be using a true digital selector system for anything no using a mechanical tuner. > Unfortunately, OP didn't say if the TV would scan downward to channel 2 or jump to it. He also didn't say if the TV normally defaulted to channel 2 when the TV was powered off or when the AC was lost. > There were a lot of TVs then that used a digital keypad, but were not remote control and used a mechanical AC switch and volume control. In this case, it's possible that the uPc is only used for channel functions and his problem could be on the micro's reset line. Until the OP tells us what the technology is we have really no way to advise usefully. 1984 could be a few things, switched linear pots with varicap is likely, or touch sensors maybe. There were also old technologies used in some sets, so can't completely rule out a mechanical selector device operating a tuning bar. NT |
| "pfjw@aol.com" <pfjw@aol.com>: Jun 30 05:19AM -0700 http://diagramasde.com/page/2118 Might be something usable here. My S.W.A.G. guess based on similar-vintage technology failing-to-default is a weak capacitor that does not hold the charge necessary to 'latch' to the chosen channel. Peter Wieck Melrose Park, PA |
| jurb6006@gmail.com: Jun 30 06:26AM -0700 Most likely it is going into reset. Does it hold your settings, like color, brightness and whatever ? Probably not. They are likely all going to factory reset. That would mean you are losing power to the micro or maybe the memory IC, or the memory IC is defective. Ir it has a memory IC it is probably an eight pin EEPROM. Look at the board and see if it has a supercapacitor or whatever, or a battery. Those could well be failing. That is actually more likely than an IC failing. Keeping this old shit running is a good thing because all the new stuff is junk. My Ma watches an old CRT based Toshiba which works just fine. I do not have a TV hooked up because the programing is all junk. The scene changes so fast you cannot see anything. PUT THE IMAC DOWN ! Anything I want to watch is old. One question here - does it return to channel 2 as you are watching it ? If so, that means there is a temporary interruption in the power supply, probably the standby supply. That would make me suspect a bad connection, or maybe one inside of a device like a regulator or something. It can also be caused by low supply voltage to whatever holds the memory. I would be headed for the power supply. |
| Chuck <chuck@mydeja.net>: Jun 30 08:44AM -0500 On Thu, 29 Jun 2017 14:02:39 -0700 (PDT), jeff.panasuk@cfl.rr.com wrote: >Back in February or March of 2010 the TV began changing from any channel to channel 2 intermittently. Sometimes very frequent. Other times more intermittent but it would not go more than a few hours without the problem popping up. Replaced IC0102 (MN14834HH) Main IC for the Channel Selection Ckt but no help. Remote control IR circuit not the problem as I disabled it. Over time have replaced some bad unrelated hw (burnt resistor, Caps). Have schematics and service manual but can't isolate the problem. Nice picture and everything else works fine. Unit in storage but every 4 months or so, when I see it and think about it, I fire it up. Hate to trash this old tv. Kind of part of the family now. Has anyone ever heard of this before? I ran the television service department in the corporate headquarters for the largest seller of Hitachi sets at that time in the U.S. so I might be able to help you. First disconnect pin 17 and 18 of IC0102 and see if the problem disappears. If so, then it is likely the channel tact switches. If not, take freeze spray and a hair dryer to the tuner. The two main failures in this model, when there were tuner problems, were the ic you replaced and the tuner itself. The band switch IC IC0104 occasionally would fail and any 2SC458s in the circuitry can cause problems. If these checks don't work, post again and we'll go deeper in depth. Chuck --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
| oldschool@tubes.com: Jun 30 03:02AM -0400 From: http://meretricia.com/news/world_losing_electrons.htm World Running Out of Electrons, New Report Warns The world is rapidly running out of electrons, a new report from environmental action group Earth First warns. They have advocated that electrons be placed on the endangered sub-atomic particles list. Electrons are being used in shocking numbers by all consumers of electricity. The usual scapegoats of the United States and Western Europe are once again at the top of the list, consuming electrons at a rate of 900 gigawatts per day. A single digital computer uses electrons at a rate of approximately 6 billion billion per second, almost equal to the rate at which the federal deficit is growing. The report predicts a serious worldwide electron shortage by tomorrow. A single digital computer uses electrons at a rate of approximately 6 billion billion per second. Confronted with the report, White House Chief of Staff Karl Rove just shrugged. "I don't know. We'll worry about it next week," he told reporters. News of the report sent electronics stocks tumbling to their lowest level in five hours. Utility company stock, however, soared, as the price of electrons doubled to over three dollars a gallon. The Earth First report recommends the immediate closure of all electron drilling, refining, and distributing operations, and a reversion back to the cave-man life style. Critics called their recommendations "somewhat drastic". Al Gore's "Alliance for Climate Protection" has called for the development of alternative energy carriers. Protons have been considered, but they are some 2000 times more massive than electrons and tend to clog the wires. Gore and the other democratic candidates have ignored neutrons, as they rarely vote anyway. The neutrons we surveyed had no opinion on the matter. The Alliance has also proposed the construction of a new sub-atomic particle to replace the dwindling electron supply. However, new sub-atomic particles are expensive, as they are often patented and cannot presently be assembled in Taiwan or Malaysia. American supercollider operators are working on better ways to export the technology, to prevent too much work being done in the United States. As the number of negative charges decreases, the entire earth becomes more electropositive, contributing to Global Positivism. While the Democrats favor a more negative planet, the Bush administration has touted the benefits of Positivism. For example, hostile aliens who traveled to earth from a more electronegative world would be "posicuted" (a generally fatal process similar to electrocution and watching Barney) as soon as they stepped out of their flying saucers. However, friendly aliens would suffer the same fate. It is not yet known whether most aliens are friendly or hostile, but science fiction authors seem to favor the latter view. The electron is not the first sub-atomic particle to be driven to annihilation or near-extinction by human activities. The tachyon, for example, was killed off by Einstein and his philosophy of special moral relativity, which permitted the extermination of non- conforming particles. The previously often hypothesized magnetic monopole was spotted once in the wild but has never been seen again by confirming researchers. The strange quark has a half-life of only 1 nanosecond and currently cannot reproduce outside of magnetic captivity. There is, at any given time, an average of less than one left in the whole world. |
| Foxs Mercantile <jdangus@att.net>: Jun 30 03:43AM -0500 This wasn't all that funny the first time around. -- Jeff-1.0 wa6fwi http://www.foxsmercantile.com --- This email has been checked for viruses by AVG. http://www.avg.com |
| thekmanrocks@gmail.com: Jun 30 05:30AM -0700 I read this article very early one April a few years back. |
| jurb6006@gmail.com: Jun 30 06:28AM -0700 Good, I am tired of those things. they are all so negative. Fukum. |
| John-Del <ohger1s@gmail.com>: Jun 29 10:19AM -0700 On Thursday, June 29, 2017 at 12:16:33 PM UTC-4, rickman wrote: > Clearly he is ill and needs our support, not reproach. > -- > Rick C Admonitions understood. I am ashamed. Thanks for that slap in the face Rick! |
| "Ian Field" <gangprobing.alien1@virginmedia.com>: Jun 29 09:59PM +0100 "John Robertson" <spam@flippers.com> wrote in message news:PvydnV7BQ6b-xMnEnZ2dnUU7-LfNnZ2d@giganews.com... > Well, I must confess I've never studied halogen bulbs on dimmers but > reading Lutron's site does not give any concerns from them about halogens > on dimmers in household use: It seems fairly obvious that a dimmed filament doesn't gas off much tungsten. Ordinary bulbs above a certain rating are banned and have been replaced by halogen capsules enclosed in a regular globe envelope. So far; I've not seen any dimmable CFLs on the shelves and LED bulbs are probably more tricky. The packaged halogen capsules are the easy way out if you want a dimmer. |
| "pfjw@aol.com" <pfjw@aol.com>: Jun 29 05:43PM -0700 https://www.1000bulbs.com/category/dimmable-cfl-compact-fluorescents/ They exist, our local Home Depot stocks them. Personally, I do not use them. If I need dimming, I use an LED. Peter Wieck Melrose Park, PA |
| "pfjw@aol.com" <pfjw@aol.com>: Jun 29 05:46PM -0700 Don't feel bad. When approached by an aggressive panhandler, I take this approach, 100% of the time: You empty your pockets (I get to search), and I will empty mine (you get to search). Whatever we find, we split it right down the middle. In well over 100 offers of this sort, I have never once had a taker. Peter Wieck Melrose Park, PA |
| Phil Allison <pallison49@gmail.com>: Jun 29 05:55PM -0700 John-Del is Deranged: > > ** You have never shown me to be actually wrong. > We don't need to go to far, you're wrong on this thread. ** No one tiny bit. OTOH you have ignored many photos that prove you wrong beyond any doubt. FYI out there: Delusional Del is an obvious lunatic and congenital asshole. ..... Phil |
| Phil Allison <pallison49@gmail.com>: Jun 29 06:12PM -0700 pf...@aol.com wrote: The Wieck troll > They exist, our local Home Depot stocks them. > Personally, I do not use them. > If I need dimming, I use an LED. ** Dimmable CFLs require a special dimmer, not the standard triac kind. LED lamps have the same issue, most of them are "non-dimmable" and the rest need a similar, special dimmer. OTOH, if you have a spare Variac lying around, it will dim most CFLs rather well and LEDs not so well. ..... Phil |
| John-Del <ohger1s@gmail.com>: Jun 29 07:23PM -0700 On Thursday, June 29, 2017 at 8:55:23 PM UTC-4, Phil Allison wrote: > > We don't need to go to far, you're wrong on this thread. > ** No one tiny bit. > OTOH you have ignored many photos that prove you wrong beyond any doubt. Those photos only prove you don't know what you're looking at. Those filaments have not nearly enough support to render those halogen lamps as sturdy as standard incandescents. Filaments that run that hot need more support per given length. General Electric says this: "Unlike incandescent rough service or vibration service lamps, Halogen and HIR lamps are not equipped with filament supports because they would result in the de-rating of the life and lumens, and thusly defeat the purpose of providing extremely long life, energy savings and high lumen output. These features differentiate Halogen and HIR lamps from similar incandescent counterparts." Phallus'n says this: I'm right and if you don't agree with me you're an autistic deranged fuckwit who should kill himself!!! Are you that delusional where you think anybody reading this NG would possibly agree with you Phil? I would suggest you take that toaster you're rebuilding and modifying and take it in the bathtub with you (plugged in), but since your trailer is so roach infested I doubt you even know what a bathtub is. |
| Phil Allison <pallison49@gmail.com>: Jun 29 07:44PM -0700 John-Del is Totally Deranged: ----------------------------------- > > ** No one tiny bit. > > OTOH you have ignored many photos that prove you wrong beyond any doubt. > Those photos only prove you don't know what you're looking at. ** They prove you and GE wrong. > Those filaments have not nearly enough support to render those halogen > lamps as sturdy as standard incandescents. ** Del is now *desperately* trying to change the subject. Cos he is a congenital, lying POS. FYI to all: Halogen tube lamps have sufficient internal supports to allow them to be used in portable work lights and similar jobs. > General Electric says this: > "Unlike incandescent rough service or vibration service lamps, Halogen and HIR lamps are not equipped with filament supports because they would result in the de-rating of the life and lumens, and thusly defeat the purpose of providing extremely long life, energy savings and high lumen output. These features differentiate Halogen and HIR lamps from similar incandescent counterparts." ** GE sell identical looking halogen tube lamps, with similar multiple supports. http://www.gelighting.com/LightingWeb/emea/images/Halogen_DEQ_and_IR_DEQ_Lamps_Data_sheet_EN_tcm181-12726.pdf > Phallus'n says this: I'm right and if you don't agree with me you're > an autistic deranged fuckwit who should kill himself!!! ** Yep - you are very much one of them. A dangerous lunatic in anyone's book. ..... Phil |
| rickman <gnuarm@gmail.com>: Jun 29 11:09PM -0400 John-Del wrote on 6/29/2017 10:23 PM: > Phallus'n says this: I'm right and if you don't agree with me you're an autistic deranged fuckwit who should kill himself!!! > Are you that delusional where you think anybody reading this NG would possibly agree with you Phil? > I would suggest you take that toaster you're rebuilding and modifying and take it in the bathtub with you (plugged in), but since your trailer is so roach infested I doubt you even know what a bathtub is. The problem with Phil is not that he rants and raves like a lunatic. The problem is that people not only read his posts, they take them seriously as if they *weren't* written by a deranged sociopath and respond! The resulting conversations are *NEVER* productive resulting in a tirade of insults and imbecilic retorts that demonstrate only the extent of his mental illness. The conversations rage on with no useful content until everyone finally tires of the insanity of it all and gives up the attempts at rational discourse. Some people take longer than others. -- Rick C |
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