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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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Manufacturer questions I always wanted answered
I always wanted the following questions answered but never thought of
asking them: 1)Is Sharp Malaysian or Japanese? as most otheir products always said "made in Malaysia" 2)Why did Sony,RCA and Zenith tv quality dropped dramatically since around 1990-3? 3)When the owner of Sony died around 1990-3 why did the accountant get the corporation? 4)Why did the law in USA for manufacturers (any kind not just electronics) being responsible for backing their products by parts & service change from 7 years to 5 then nothing now?,meaning now you can buy a product with no warranty and when parts are needed "sorry NLA". 5)Why did LG Goldstar decide to place Zenith crt's in many Goldstar tv's since they bought Zenith from bankruptsy in 1996 or so? 6)I noticed many JVC products have Panasonic parts what is the relationship? 7)Who invented VHS? Panasonic or JVC? or is it that JVC invented the tape and Panasonic the machine? 8)Why don't manufacturers in USA & Canada provide a large full page schematic of their tv's & vcr's included in the owner's manual like many parts of the world?. Sidney 32 years old Dartmouth,Nova Scotia Canada http://groups.google.com/group/hfx.f...696 fbf04837f http://www.iwaynet.net/~nesda/May02/May18.html http://www.iwaynet.net/~nesda/SonyAudMod.html http://www.newark.com/product-detail...ge/32-9495.jpg http://www.tipsmaster.ca/hottips-1.HTM http://www.tipsmaster.ca/1011-TV32C50-007.jpg http://www.iwaynet.net/~nesda/June03/June0315.html http://www.iwaynet.net/~nesda/Apr03/Apr033.html |
#2
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Manufacturer questions I always wanted answered
ha scritto nel messaggio oups.com... I always wanted the following questions answered but never thought of asking them: 1)Is Sharp Malaysian or Japanese? as most otheir products always said "made in Malaysia" Japanese, but has factories everywhere, like Sony and many other brands. Today some Sharps are made in Turkey by Vestel (quality dropped) 2)Why did Sony,RCA and Zenith tv quality dropped dramatically since around 1990-3? Zenith went in bankrupt around 1993-1994. Zeniths after this year are trash bins () 3)When the owner of Sony died around 1990-3 why did the accountant get the corporation? BOH 4)Why did the law in USA for manufacturers (any kind not just I'm italian and i don't know USA laws. Here in italy there's a two-year warranty for everything electronic. 5)Why did LG Goldstar decide to place Zenith crt's in many Goldstar tv's since they bought Zenith from bankruptsy in 1996 or so? I don't know if Zenith ever made C.R.T.s. .. 6)I noticed many JVC products have Panasonic parts what is the relationship? I don't know 7)Who invented VHS? Panasonic or JVC? or is it that JVC invented the tape and Panasonic the machine? The first VHS was from Matsu****a Electric and sold under Panasonic and National brands. Maybe sold under JVC too 8)Why don't manufacturers in USA & Canada provide a large full page schematic of their tv's & vcr's included in the owner's manual like many parts of the world?. Ahem.. we have the same problem here in Italy. In past times schematics were complete and with a lot of explanations. Now there are only schematics without explanations, or, no schematics! Some times schematics cant' be found in Internet, and we don't have schematics (grr) http://groups.google.com/group/hfx.f...696 fbf04837f http://www.iwaynet.net/~nesda/May02/May18.html http://www.iwaynet.net/~nesda/SonyAudMod.html http://www.newark.com/product-detail...ge/32-9495.jpg http://www.tipsmaster.ca/hottips-1.HTM http://www.tipsmaster.ca/1011-TV32C50-007.jpg http://www.iwaynet.net/~nesda/June03/June0315.html http://www.iwaynet.net/~nesda/Apr03/Apr033.html Links? About what? from italy bye |
#3
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Manufacturer questions I always wanted answered
Inty (BHO!) wrote: ha scritto nel messaggio oups.com... I always wanted the following questions answered but never thought of asking them: 1)Is Sharp Malaysian or Japanese? as most otheir products always said "made in Malaysia" Japanese, but has factories everywhere, like Sony and many other brands. Today some Sharps are made in Turkey by Vestel (quality dropped) I am talking about their older units 2)Why did Sony,RCA and Zenith tv quality dropped dramatically since around 1990-3? Zenith went in bankrupt around 1993-1994. Zeniths after this year are trash bins () 3)When the owner of Sony died around 1990-3 why did the accountant get the corporation? BOH 4)Why did the law in USA for manufacturers (any kind not just I'm italian and i don't know USA laws. Here in italy there's a two-year warranty for everything electronic. 5)Why did LG Goldstar decide to place Zenith crt's in many Goldstar tv's since they bought Zenith from bankruptsy in 1996 or so? I don't know if Zenith ever made C.R.T.s. .. yes they did. 6)I noticed many JVC products have Panasonic parts what is the relationship? I don't know 7)Who invented VHS? Panasonic or JVC? or is it that JVC invented the tape and Panasonic the machine? The first VHS was from Matsu****a Electric and sold under Panasonic and National brands. Maybe sold under JVC too 8)Why don't manufacturers in USA & Canada provide a large full page schematic of their tv's & vcr's included in the owner's manual like many parts of the world?. Ahem.. we have the same problem here in Italy. In past times schematics were complete and with a lot of explanations. Now there are only schematics without explanations, or, no schematics! Some times schematics cant' be found in Internet, and we don't have schematics (grr) http://groups.google.com/group/hfx.f...696 fbf04837f http://www.iwaynet.net/~nesda/May02/May18.html http://www.iwaynet.net/~nesda/SonyAudMod.html http://www.newark.com/product-detail...ge/32-9495.jpg http://www.tipsmaster.ca/hottips-1.HTM http://www.tipsmaster.ca/1011-TV32C50-007.jpg http://www.iwaynet.net/~nesda/June03/June0315.html http://www.iwaynet.net/~nesda/Apr03/Apr033.html Links? About what? from italy bye The links are my signature which state my qualifications so that techs here know I am one of them and not a garage hack. |
#4
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Manufacturer questions I always wanted answered
4)Why did the law in USA for manufacturers (any kind not just
electronics) being responsible for backing their products by parts & service change from 7 years to 5 then nothing now?,meaning now you can buy a product with no warranty and when parts are needed "sorry NLA". The "parts for 7 years" has always been an urban legend. Warranty and parts availability at least in the USA, has not been controlled by law, but whatever the company thought was in their best interest. It's getting really bad in some cases: for example a lot of $899 HP printers that are just a year or three old do not have ANY print drivers available from HP for the latest 64-bit XP. |
#5
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Manufacturer questions I always wanted answered
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#6
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Manufacturer questions I always wanted answered
Ancient_Hacker wrote: 4)Why did the law in USA for manufacturers (any kind not just electronics) being responsible for backing their products by parts & service change from 7 years to 5 then nothing now?,meaning now you can buy a product with no warranty and when parts are needed "sorry NLA". The "parts for 7 years" has always been an urban legend. Warranty and parts availability at least in the USA, has not been controlled by law, but whatever the company thought was in their best interest. It's getting really bad in some cases: for example a lot of $899 HP printers that are just a year or three old do not have ANY print drivers available from HP for the latest 64-bit XP. Simple. Don't buy HP ! Graham |
#7
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Manufacturer questions I always wanted answered
The answer to most of your questions is ..its the consumers fault . 98%
of consumers want everything for a low price so all the manufacturers cut every corner they could to lower the prices resulting in low quality and poor service . |
#9
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Manufacturer questions I always wanted answered
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#10
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Manufacturer questions I always wanted answered
ha scritto nel messaggio oups.com... I am talking about their older units Malaysia, Japan, Philippines, and many others.. yes they did. oh.. The links are my signature which state my qualifications so that techs here know I am one of them and not a garage hack. all right.. i am a garage hacker |
#11
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Manufacturer questions I always wanted answered
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#12
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Manufacturer questions I always wanted answered
wrote in message ups.com... 4-There never has been a warranty law in the US. Some States, like MA have laws of this sort, but only a handfull. I have yet to find any manufacture that will not sell at reasonable cost to a qualified servicer the service information, some even provide them for free, Hitachi for one. Then you have not tried to service many of the newer products. Infocus, BenQ, Viewsonic, Dell, and many more of the vendors currently selling consumer products will not sell you parts nor manuals. Hitachi is a very atypical vendor, providing excellent service support for free to any qualified (actually, any shop that is a legitimate business, not necesarily qualified to do very much) servicer. Most other vendors do not supply training materials beyond their ASCs and many manuals are not reasonably priced at all. It very much depends on the vendor. Even many of the traditional TV makers are providing very limited support for field service on boards that are easily serviced. Sharp and Panasonic, for instance provide NO SCHEMATIC in the service manual and no parts list for some power supplies that are easily repaired. Until servicers and consumers pressure manufacturers, the trend will likely continue. Gateway, for instance, would not sell part for their PDPs until just recently. They have changed their tune after many customer complaints and lawsuits. Even so, their service support is virtually useless, other than guessing at what board to change. When the auto service industry began to limit support to independent servicers, the ASC negotiated with them to solve the problem, avoiding action in Congress. They took a proactive stance insupport of servicers and consumers. Too bad NESDA in the USA has amounted to nothing more than a group of "good ole boys" who get together for a party once a year. Leonard -------------------------------------------------------------------------------- I am using the free version of SPAMfighter for private users. It has removed 8119 spam emails to date. Paying users do not have this message in their emails. Try SPAMfighter for free now! |
#13
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Manufacturer questions I always wanted answered
"Ken G." wrote in message ... The answer to most of your questions is ..its the consumers fault . 98% of consumers want everything for a low price so all the manufacturers cut every corner they could to lower the prices resulting in low quality and poor service . That's the retailer's fault. They never show you a good reason to spend more than the minimum, and when they do try you get the impression that they are motivated by a bonus and not a desire to help you. |
#14
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Manufacturer questions I always wanted answered
In article ,
Eeyore wrote: 6)I noticed many JVC products have Panasonic parts what is the relationship? Panasonic is a JVC trade name. They're quite good parts actually. Think that's the wrong way round. Panasonic is owned by Matsu****a, who took over JVC in the '50s. -- *It's this dirty because I washed it with your wife's knickers* Dave Plowman London SW To e-mail, change noise into sound. |
#15
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Manufacturer questions I always wanted answered
"Homer J Simpson" wrote in message news:KrtYg.14999$P7.9741@edtnps90... "Ken G." wrote in message ... The answer to most of your questions is ..its the consumers fault . 98% of consumers want everything for a low price so all the manufacturers cut every corner they could to lower the prices resulting in low quality and poor service . That's the retailer's fault. They never show you a good reason to spend more than the minimum, and when they do try you get the impression that they are motivated by a bonus and not a desire to help you. Not always true. There are lots of quality dealers out there that understand the differences between price and value, and between selection and choice. The consumer demanding more for less, combined with the trend in retailing toward box-moving effiencies at the expense of value added and intelligent decision making are BOTH at fault. When consumers demand more, they generally get it. The success of specialty retailers and custom installation and integration services is evidence of this. The retail and service industries in general lack creativity, knowledge, and vision, and the result is the lowest common denominator. There are notable exceptions, though they have to be sought out beyond the laundry lists disguised as full color adds in the Sunday paper. Leonard -------------------------------------------------------------------------------- I am using the free version of SPAMfighter for private users. It has removed 8126 spam emails to date. Paying users do not have this message in their emails. Try SPAMfighter for free now! |
#16
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Manufacturer questions I always wanted answered
"Dave Plowman (News)" wrote: In article , Eeyore wrote: 6)I noticed many JVC products have Panasonic parts what is the relationship? Panasonic is a JVC trade name. They're quite good parts actually. Think that's the wrong way round. Panasonic is owned by Matsu****a, who took over JVC in the '50s. The plot thickens. Graham |
#17
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Manufacturer questions I always wanted answered
In article ,
Eeyore wrote: Panasonic is a JVC trade name. They're quite good parts actually. Think that's the wrong way round. Panasonic is owned by Matsu****a, who took over JVC in the '50s. The plot thickens. I always assumed Panasonic was the premium brand of Matsu****a. They are or were heavily into the broadcast market. MII was the rival to Sony Betacam, and arguably of better quality - so the VHS/Beta situation got reversed there as Betacam was by far more popular. -- *When the going gets tough, use duct tape Dave Plowman London SW To e-mail, change noise into sound. |
#18
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Manufacturer questions I always wanted answered
" wrote:
8- Manufactures CANNOT by law give schematics or service information to customers in the users guide or manual. The simple fact of putting a schematic in the OWNERS manual will keep it from being UL certified for sale in the USA. Even the European standards for the low voltage directive include a clause of reasonable misuse or abuse. I would say that putting a schematic in the users manual would make the user think they can take the unit apart no matter what warnings are in the manual or on the unit. I have yet to find any manufacture that will not sell at reasonable cost to a qualified servicer the service information, some even provide them for free, Hitachi for one. Realize that many newer units have boards and proprietary parts that should not be serviced in the field due to the cost of the equipment and skill levels required which most shops do not want to afford. The schematics were shipped inside the TV for decades. All UL cares about is if the set will catch on fire, implode, or tip over. They test for any reasonable safety fault, nothing more. Be sure not to forget their high testing fees, of course. Have you ever met a real, live UL inspector? I have, and all they were worried about was the paperwork process used by my employer. -- 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 |
#19
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Manufacturer questions I always wanted answered
"Dave Plowman (News)" wrote in message ... I always assumed Panasonic was the premium brand of Matsu****a. That's how I remember it - from 40 years ago. |
#20
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Manufacturer questions I always wanted answered
"Dave Plowman (News)" wrote:
In article , Eeyore wrote: Panasonic is a JVC trade name. They're quite good parts actually. Think that's the wrong way round. Panasonic is owned by Matsu****a, who took over JVC in the '50s. The plot thickens. I always assumed Panasonic was the premium brand of Matsu****a. They are or were heavily into the broadcast market. MII was the rival to Sony Betacam, and arguably of better quality - so the VHS/Beta situation got reversed there as Betacam was by far more popular. Matsu****a came up with the Panasonic name when they entered the US market, to sound "More American". They felt the use of Matsu****a would hurt sales because it didn't look or sound "American" -- 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 |
#21
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Manufacturer questions I always wanted answered
In article ,
Michael A. Terrell wrote: Matsu****a came up with the Panasonic name when they entered the US market, to sound "More American". They felt the use of Matsu****a would hurt sales because it didn't look or sound "American" In the UK we have one chain of electrical dealers whose own brand name is Japanese sounding. I think they should have called it Lucas. ;-) -- *The man who fell into an upholstery machine is fully recovered* Dave Plowman London SW To e-mail, change noise into sound. |
#22
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Manufacturer questions I always wanted answered
Hi!
1)Is Sharp Malaysian or Japanese? as most otheir products always said "made in Malaysia" Sharp Electronics is a Japanese company. They probably build things wherever they can do so, as long as it is the cheapest place to do so. Their headquarters in Japan is probably more devoted to business related work, and not actual manufacturing. Drivers for their printers still appear to be developed in Japan. 2)Why did Sony,RCA and Zenith tv quality dropped dramatically since around 1990-3? The most likely answer is that the buying public wanted things cheaper. Things can only get so cheap (at least usually) before something gives. Zenith might have been teetering on the edge of failure at that point, and the RCA/GE brands had become part of Thomson Consumer Electronics around that time. 3)When the owner of Sony died around 1990-3 why did the accountant get the corporation? Dunno. Not sure how you'd find out. 4)Why did the law in USA for manufacturers (any kind not just electronics) being responsible for backing their products by parts & service change from 7 years to 5 then nothing now?,meaning now you can buy a product with no warranty and when parts are needed "sorry NLA". No warranty? Now that I highly doubt. As far as parts go, the way I've heard it is that manufacturers are under no obligation to provide parts to the public...only authorized repair centers. Any more, it is said that product lines and the technology used to produce them are passed up by something "newer" (not always better--maybe "cheaper") that providing parts and service over the long term doesn't make sense. Many people don't care to repair something when it breaks anyway. They just toss it, give it away or whatever and then buy something new. 5)Why did LG Goldstar decide to place Zenith crt's in many Goldstar tv's since they bought Zenith from bankruptsy in 1996 or so? Couldn't tell you for sure...I don't know if LG was/is in the picture tube business. And the TVs may have really been built by Zenith to start with. If when they bought Zenith, control over the entire operation became theirs (as it surely did) someone may have decided that the picture tube manufacturing facilities were an asset. 6)I noticed many JVC products have Panasonic parts what is the relationship? Perhaps it's a business relationship between the two. Some of the things in a VCR are high precision parts that not anyone can make. It may be cheaper for JVC to buy the parts and assemblies from someone else than to make them in-house. In any case, few electronic devices have components that were made by the company who assembled them. 7)Who invented VHS? Panasonic or JVC? or is it that JVC invented the tape and Panasonic the machine? As far as I know, it was JVC that invented VHS. (The JVC company makes this claim.) Perhaps there was a marketing agreement between the two companies. Such things happen quite often when a new technology comes out...companies may form alliances with one another. 8)Why don't manufacturers in USA & Canada provide a large full page schematic of their tv's & vcr's included in the owner's manual like many parts of the world?. People in the US don't generally want to repair anything. Also, it's getting harder to find repair shops. There was a good one here that just disappeared one day. To this day I still don't know why. They managed to do quite a business. At one time the practice of providing service literature with a product was common, however. I have a Montgomery Ward branded 19 inch table TV (still working well) from the mid-80s that has a plastic compartment containing a complete packet of service literature. Printed all over this literature in red ink are notices stating that the documentation is the property of the customer and should be returned with the set when it is repaired. William |
#23
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Manufacturer questions I always wanted answered
Hi!
It's getting really bad in some cases: for example a lot of $899 HP printers that are just a year or three old do not have ANY print drivers available from HP for the latest 64-bit XP. Now that is truly odd. I've found that HP has usually done a good job of providing updated drivers for many older products. In my case, they had updated the Mac OS X drivers to be "Universal" (Intel & PowerPC) software for a DeskJet 5800 series printer. On the PC side of things, I was impressed to note that XP/2000 drivers were available for my OfficeJet 500 series machine. As far as I'm aware, the 64 bit editions of Windows XP have not been hugely popular, have a pile of limitations on what current software can run on them, and much hardware doesn't appear to be supported. William |
#24
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Manufacturer questions I always wanted answered
Michael A. Terrell spake thus:
Have you ever met a real, live UL inspector? I have, and all they were worried about was the paperwork process used by my employer. IOW, so long as it passed the ISO 9001 bureaucracy tests, they were happy? -- "In 1964 Barry Goldwater declared: 'Elect me president, and I will bomb the cities of Vietnam, defoliate the jungles, herd the population into concentration camps and turn the country into a wasteland.' But Lyndon Johnson said: 'No! No! No! Don't you dare do that. Let ME do it.'" - Characterization (paraphrased) of the 1964 Goldwater/Johnson presidential race by Professor Irwin Corey, "The World's Foremost Authority." |
#25
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Manufacturer questions I always wanted answered
"Dave Plowman (News)" wrote: In article , Eeyore wrote: Panasonic is a JVC trade name. They're quite good parts actually. Think that's the wrong way round. Panasonic is owned by Matsu****a, who took over JVC in the '50s. The plot thickens. I always assumed Panasonic was the premium brand of Matsu****a. They are or were heavily into the broadcast market. MII was the rival to Sony Betacam, and arguably of better quality - so the VHS/Beta situation got reversed there as Betacam was by far more popular. You're definitely right about Panasonic being a Matsu****a brand now that I come to think of it. JVC invented VHS though. Graham |
#26
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Manufacturer questions I always wanted answered
"Dave Plowman (News)" wrote: In article , Michael A. Terrell wrote: Matsu****a came up with the Panasonic name when they entered the US market, to sound "More American". They felt the use of Matsu****a would hurt sales because it didn't look or sound "American" In the UK we have one chain of electrical dealers whose own brand name is Japanese sounding. I think they should have called it Lucas. ;-) Don't forget they had both Saisho and Matsui. Graham |
#27
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Manufacturer questions I always wanted answered
"William R. Walsh" wrote: Hi! It's getting really bad in some cases: for example a lot of $899 HP printers that are just a year or three old do not have ANY print drivers available from HP for the latest 64-bit XP. Now that is truly odd. I've found that HP has usually done a good job of providing updated drivers for many older products. Really ? Easily a decade ago I recall getting a DJ500C ? and it wouldn't install on WFWG it was 'unsupported' as a 'network printer'. Graham |
#28
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Manufacturer questions I always wanted answered
Eeyore wrote: "Dave Plowman (News)" wrote: In article , Eeyore wrote: Panasonic is a JVC trade name. They're quite good parts actually. Think that's the wrong way round. Panasonic is owned by Matsu****a, who took over JVC in the '50s. The plot thickens. I always assumed Panasonic was the premium brand of Matsu****a. They are or were heavily into the broadcast market. MII was the rival to Sony Betacam, and arguably of better quality - so the VHS/Beta situation got reversed there as Betacam was by far more popular. You're definitely right about Panasonic being a Matsu****a brand now that I come to think of it. National and technics too. Bob JVC invented VHS though. Graham ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#29
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Manufacturer questions I always wanted answered
Michael A. Terrell wrote: Matsu****a came up with the Panasonic name when they entered the US market, to sound "More American". They felt the use of Matsu****a would hurt sales because it didn't look or sound "American" Why didn't they use National, a brand name they had already been using in the rest of the world, including Japan? Was it because the National boy looked too much like Bob's Big Boy? |
#30
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Manufacturer questions I always wanted answered
Hi!
Really ? Yep. I don't think I've ever had a DeskJet 500C in my possession, but I do have a 500 and a 560C, both of which are still in active use. Both have been attached to Windows for Workgroups machines and they worked fine in a networked environment. HP used to say that a lot of their printers were "not supported" as network printers...I know the 600 and 660 were on that list. It involved a lot of tinkering around, but I did get them working over a network. I wish I could remember just how I'd done it--one of those printers wore out and the other one, while still around, is hooked up to a much newer computer. William |
#31
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Manufacturer questions I always wanted answered
wrote in message ups.com... Why didn't they use National, a brand name they had already been using in the rest of the world, including Japan? Was it because the National boy looked too much like Bob's Big Boy? The Japanese mind? |
#32
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#33
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Manufacturer questions I always wanted answered
Eeyore wrote:
You're definitely right about Panasonic being a Matsu****a brand now that I come to think of it. JVC invented VHS though. JVC was part of a small consortium that bought the rights to Ampex's cartridge video tape design when they decided not to enter the consumer video tape market. IIRC, they paid a measly $10,000 for everything. -- 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 |
#34
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Manufacturer questions I always wanted answered
In article ,
Eeyore wrote: I always assumed Panasonic was the premium brand of Matsu****a. They are or were heavily into the broadcast market. MII was the rival to Sony Betacam, and arguably of better quality - so the VHS/Beta situation got reversed there as Betacam was by far more popular. You're definitely right about Panasonic being a Matsu****a brand now that I come to think of it. JVC invented VHS though. It became part of the Matsu****a group - they bought 50% - in the early '50s, so I'd guess it's simply a marketing thing. -- *A hangover is the wrath of grapes. Dave Plowman London SW To e-mail, change noise into sound. |
#35
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Manufacturer questions I always wanted answered
In article ,
Michael A. Terrell wrote: JVC was part of a small consortium that bought the rights to Ampex's cartridge video tape design when they decided not to enter the consumer video tape market. IIRC, they paid a measly $10,000 for everything. Didn't know that. If you Google on helical scan the hits I looked at credit Ampex with inventing this in '56 - but of course the original 2" quadruplex pro machines weren't helical scan. They had the head at right angles to the tape and achieved head wrap with vacuum. Four heads were needed on the drum so one was always in contact with the tape - hence the name. This was impractical for domestic use as you need a clean supply of compressed air. Helical scan gets round this by having the head just off in line with the tape and records along, rather than across, the tape and only needs two heads on the drum. The tape itself can deform enough for good head contact so no vacuum needed. Ampex pro helical scan - 1" C Format - machines didn't appear until the late '60s, although others had used it for semi-pro apps before. So I do wonder who holds the patent on helical scan? More Googling is needed... -- *If at first you don't succeed, then skydiving definitely isn't for you * Dave Plowman London SW To e-mail, change noise into sound. |
#36
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Manufacturer questions I always wanted answered
2)Why did Sony,RCA and Zenith tv quality dropped dramatically since around 1990-3? Probably because of: 3)When the owner of Sony died around 1990-3 why did the accountant get the corporation? Keyword= accountant. |
#37
Posted to sci.electronics.repair
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Manufacturer questions I always wanted answered
"Dave Plowman (News)" wrote:
In article , Michael A. Terrell wrote: JVC was part of a small consortium that bought the rights to Ampex's cartridge video tape design when they decided not to enter the consumer video tape market. IIRC, they paid a measly $10,000 for everything. Didn't know that. If you Google on helical scan the hits I looked at credit Ampex with inventing this in '56 - but of course the original 2" quadruplex pro machines weren't helical scan. They had the head at right angles to the tape and achieved head wrap with vacuum. Four heads were needed on the drum so one was always in contact with the tape - hence the name. This was impractical for domestic use as you need a clean supply of compressed air. Helical scan gets round this by having the head just off in line with the tape and records along, rather than across, the tape and only needs two heads on the drum. The tape itself can deform enough for good head contact so no vacuum needed. Ampex pro helical scan - 1" C Format - machines didn't appear until the late '60s, although others had used it for semi-pro apps before. So I do wonder who holds the patent on helical scan? More Googling is needed... I would think they have expired, long ago. Open R-R 1/2" mono and color machines were being sold by Panasonic, Shibaden and Sony by 1970 as "Industrial Video" for making training tapes and low grade commercials. My high school got a Panasonic for the '69-'70 school year, and only two tapes and a camera. It was to be used to time shift the EDTV on PBS to when a teacher needed it. I had teachers demanding that very show related to their class be recorded and archived on tape that was $110 an hour. The US Army was in the process of phasing out all of its 2" Ampex machines to U-matic at Ft Rucker Alabama when I was stationed there in '72-'73. Ever see a U-matic with a Tektronix nameplate? the military wasn't allowed to purchase foreign made electronics, unless it was supported by a well known US company, so the Sony machines were sold through Tektronix. BTW, two 2" machines and the associated equipment was in a full length tractor trailer for remote shoots. Less than 20 years later I had more capability in the back of the mobile production unit I built in a standard length van for WACX in Orlando. -- 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 |
#38
Posted to sci.electronics.repair
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Manufacturer questions I always wanted answered
Eeyore wrote:
"William R. Walsh" wrote: Hi! It's getting really bad in some cases: for example a lot of $899 HP printers that are just a year or three old do not have ANY print drivers available from HP for the latest 64-bit XP. Now that is truly odd. I've found that HP has usually done a good job of providing updated drivers for many older products. Really ? Easily a decade ago I recall getting a DJ500C ? and it wouldn't install on WFWG it was 'unsupported' as a 'network printer'. Is that a control-panel-less printer? If not, more or less all printers will run on a whole host of other-model drivers. If a driver isnt availble I just pick something else with the same type of print, ie same resolution and same print technology (inkjet/dm/daisy/laser etc) and same manufacturer. The differences tend to lie in very minor points that arent a problem in practice. NT |
#39
Posted to sci.electronics.repair
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Manufacturer questions I always wanted answered
On Sun, 15 Oct 2006 14:29:16 +0100 Eeyore
wrote in Message id: : I've *never* see a schematic in an owner's manual ever ! I did. Once. It was a 13" Goldstar purchased around 1984 or so. Of course the thing lasted till the CRT finaly faded out (14 years!) |
#40
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Manufacturer questions I always wanted answered
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