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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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classic NAD MR-20 for sale
After 20+ years of faithful service (please forgive the pathetic fallacy),
my NAD MR-20 has started having problems (which I'll get to shortly). In the late '80s, NAD (New Acoustic Dimension) and Proton started making high-quality color TVs, in an attempt to take market share from Sony who (from my point of view) was the only company trying to deliver a consistently good picture. The MR-20 was a success (you might still be able to find my review on the Stereophile site), and I suspect thousands of them are still in use. It is _absolutely_ a classic color TV, one of the first to take on Sony and beat it at its own game. This particular MR-20 was purchased in the late '80s, not long after it was introduced. It's actually an MR-20a, the modification being an improvement to the comb filter that reduced the visibility of "hanging dots". The set has roughly 20K hours on it (frightening!), and until now had only one problem, a bad cap on the video driver board. A few weeks ago it abruptly began showing drops in brightness along with a loss of sharpness. Since then, it has more or less stabilized. It now takes about 5 to 10 minutes for the CRT to come to full brightness, after which the picture is generally good, with occasional losses of brightness & sharpness, or a slight "flickering" of the black level. It's not clear what the problem is. It could be a bad HV rectifier, more bad caps on the driver board, or even a failing CRT. Not surprisingly, parts are no longer available. I've decided not to make any effort to fix the MR-20. It's my home-office set, and I can substitute an old Sony 13" for it. (Perhaps next year I'll buy a 26" Vizio. You should see the new 52" Vizio -- outstanding picture, and dirt-cheap.) The cabinet is in excellent condition. The only cosmetic "problem" is that the sheet of plate glass protecting the CRT disintegrated several years ago. (That's an interesting story in and of itself.) The MR-20 wasn't cheap, but it's given so much service I could toss it without thinking twice. However, I'd rather sell it to someone who collects classic TVs. Though I normally keep cartons for everything, the MR-20 carton is long-gone, and it's a heavy set that isn't easy (or cheap) to ship safely. If anyone is interested, please contact me directly. I'll be happy to supply photos and any specifics. Thank you. |
#2
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
On Sep 17, 8:36 am, "William Sommerwerck"
wrote: After 20+ years of faithful service (please forgive the pathetic fallacy), my NAD MR-20 has started having problems (which I'll get to shortly). In the late '80s, NAD (New Acoustic Dimension) and Proton started making high-quality color TVs, in an attempt to take market share from Sony who (from my point of view) was the only company trying to deliver a consistently good picture. The MR-20 was a success (you might still be able to find my review on the Stereophile site), and I suspect thousands of them are still in use. It is _absolutely_ a classic color TV, one of the first to take on Sony and beat it at its own game. This particular MR-20 was purchased in the late '80s, not long after it was introduced. It's actually an MR-20a, the modification being an improvement to the comb filter that reduced the visibility of "hanging dots". The set has roughly 20K hours on it (frightening!), and until now had only one problem, a bad cap on the video driver board. A few weeks ago it abruptly began showing drops in brightness along with a loss of sharpness. Since then, it has more or less stabilized. It now takes about 5 to 10 minutes for the CRT to come to full brightness, after which the picture is generally good, with occasional losses of brightness & sharpness, or a slight "flickering" of the black level. It's not clear what the problem is. It could be a bad HV rectifier, more bad caps on the driver board, or even a failing CRT. Not surprisingly, parts are no longer available. I've decided not to make any effort to fix the MR-20. It's my home-office set, and I can substitute an old Sony 13" for it. (Perhaps next year I'll buy a 26" Vizio. You should see the new 52" Vizio -- outstanding picture, and dirt-cheap.) The cabinet is in excellent condition. The only cosmetic "problem" is that the sheet of plate glass protecting the CRT disintegrated several years ago. (That's an interesting story in and of itself.) The MR-20 wasn't cheap, but it's given so much service I could toss it without thinking twice. However, I'd rather sell it to someone who collects classic TVs. Though I normally keep cartons for everything, the MR-20 carton is long-gone, and it's a heavy set that isn't easy (or cheap) to ship safely. If anyone is interested, please contact me directly. I'll be happy to supply photos and any specifics. Thank you. Why don't you see if Bill Noble's 17" Trinitron is still kicking around? It would have no remote but with my luck with them it'll make it till there's nothing to watch off-air and then some. |
#3
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
"Jeffrey D Angus" wrote in message
... William Sommerwerck wrote: The MR-20 wasn't cheap, but it's given so much service I could toss it without thinking twice. As my mother used to say, "Eat this, we were just going to throw it away." That sounds more Jewish than Scottish... |
#4
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
In "William Sommerwerck" writes:
"Jeffrey D Angus" wrote in message ... William Sommerwerck wrote: The MR-20 wasn't cheap, but it's given so much service I could toss it without thinking twice. As my mother used to say, "Eat this, we were just going to throw it away." That sounds more Jewish than Scottish... Haggis is Scottish. It would certainly make sense in that context. -- Tim Mullen ------------------------------------------------------------------ Am I in your basement? Looking for antique televisions, fans, etc. ------ finger this account or call anytime: (212)-463-0552 ------- |
#5
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
In Jeffrey D Angus writes:
Definition of haggis. Slaughter a sheep. Sell all the edible parts to the English. Cook the rest and call it haggis. That being said, it 'tis a truly wonderful food. But then again, I like Marmite and Vegemite as well. Y'all over there in the corner better watch out when Jeff offers to cook "Jugged Hare". -- Tim Mullen ------------------------------------------------------------------ Am I in your basement? Looking for antique televisions, fans, etc. ------ finger this account or call anytime: (212)-463-0552 ------- |
#6
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
That being said, [haggis] 'tis a truly wonderful food.
It can also be a movie. See Paul Haggis's "Crash". Horrible, horrible. But then again, I like Marmite and Vegemite as well. I like the taste of Vegemite a lot. But the salt keeps you from any more than a little of it. |
#7
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
Y'all over there in the corner better watch out when
Jeff offers to cook "Jugged Hare". I came across "jugged rabbit" recently in "Dead Man's Walk". Had to look it up. |
#8
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
In "William Sommerwerck" writes:
That being said, [haggis] 'tis a truly wonderful food. It can also be a movie. See Paul Haggis's "Crash". Horrible, horrible. That bad, huh? He's a prolific, critically-acclaimed writer/producer/ director, but for no particular reason I haven't seen any of his films. The other "Crash", based on the J. G. Ballard novel about car crash fetishes, is quite good. Eva's favorite film -- and she wanted me to teach her how to drive. Uh-uh. I like the taste of Vegemite a lot. But the salt keeps you from any more than a little of it. ^^^^^ "protects" -- Tim Mullen ------------------------------------------------------------------ Am I in your basement? Looking for antique televisions, fans, etc. ------ finger this account or call anytime: (212)-463-0552 ------- |
#9
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
Tim Mullen wrote:
In "William Sommerwerck" writes: That being said, [haggis] 'tis a truly wonderful food. It can also be a movie. See Paul Haggis's "Crash". Horrible, horrible. That bad, huh? He's a prolific, critically-acclaimed writer/producer/ director, but for no particular reason I haven't seen any of his films. The other "Crash", based on the J. G. Ballard novel about car crash fetishes, is quite good. Eva's favorite film -- and she wanted me to teach her how to drive. Uh-uh. Sounds like you need a 'Nerf' car! ;-) I like the taste of Vegemite a lot. But the salt keeps you from any more than a little of it. ^^^^^ "protects" -- Tim Mullen ------------------------------------------------------------------ Am I in your basement? Looking for antique televisions, fans, etc. ------ finger this account or call anytime: (212)-463-0552 ------- -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#10
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
It can also be a movie. See Paul Haggis's "Crash". Horrible, horrible.
That bad, huh? He's a prolific, critically-acclaimed writer/producer/ director, but for no particular reason I haven't seen any of his films. "Crash" is one of the worst films ever to get Best Picture. The other "Crash", based on the J. G. Ballard novel about car crash fetishes, is quite good. Eva's favorite film -- and she wanted me to teach her how to drive. Uh-uh. That's on my "maybe one day" list of films to see. I like the taste of Vegemite a lot. But the salt keeps you from any more than a little of it. ^^^^^ "protects" I meant to say "keeps you from eating any more than a little of it". |
#11
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
In "William Sommerwerck" writes:
The other "Crash", based on the J. G. Ballard novel about car crash fetishes, is quite good. Eva's favorite film -- and she wanted me to teach her how to drive. Uh-uh. That's on my "maybe one day" list of films to see. Certainly not a great film in the literary sense, but it is very sexy. [Vegemite] I meant to say "keeps you from eating any more than a little of it". A friend calls hot peppers the ironic vegetable, since presumably the sting developed to ward off predators, and now people eat them because of the sting! -- Tim Mullen ------------------------------------------------------------------ Am I in your basement? Looking for antique televisions, fans, etc. ------ finger this account or call anytime: (212)-463-0552 ------- |
#12
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
[Vegemite]
I meant to say "keeps you from eating any more than a little of it". A friend calls hot peppers the ironic vegetable, since presumably the sting developed to ward off predators, and now people eat them because of the sting! Ditto for caffeine. |
#13
Posted to sci.electronics.repair,rec.antiques.radio+phono
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classic NAD MR-20 for sale
Jeffrey D Angus wrote:
Definition of haggis. Slaughter a sheep. Sell all the edible parts to the English. Cook the rest and call it haggis. And all this time, I thought 'haggis' was Scottish for "gag a maggot". ;-) |
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