#16
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John |
#17
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Very nice!
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#18
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I have an 2000 "Sony" Trinitron. Not necesarly relabile, because that chassi model had problems with an integrated circuit and mine had a problem with the H.V. connection on the tube, but otherwise, no problems.
The older '90's problably where more relaible. My granfather had an 1995 U.K. assambled "Panasonic" that worked up untill around 2010. He gave it away without teeling me. The set didn't had a problem in it's entire life and it was regullary used. |
#19
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A dirty little secret is that year in and year out, Panasonic made a more reliable TV than Sony. Sony had some great chassis but always seemed to make a clunker here and there, but I can't recall Panny ever making a clunker. John |
#20
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I have to agree, even the GE PC (?) was proof Panny could improve all things SS, after doing it for Quasar a decade before much as I like Motorola SS, they could be a bear sometimes
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"When resistors increase in value, they're worthless" -Dave G |
Audiokarma |
#21
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What exactly was the problem with that MCZ chip?
"Panasonic" probably knew that they couldn't make such as good picture tube as "Sony" did, so they went making more relaible chassies - good publicity? "Samsung" made quite relaible tv sets. I know that in U.S.A. they where problematic, but the ones for Romania where pretty lasting tv sets. |
#22
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#23
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My DA4 chassis HD-CRT Sony has 2 of them and one blew leaving me with a dead set a few years ago...I ordered a new pair (the place sent me like 5 of them for some reason so I have spares) and somehow guessed the right one first try and fixed it with only one chip...I added a socket for that chip while I was in there so if it dies again it'll take half the time to change it.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#24
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One of the easy ways to troubleshoot them was to heat them with the back of a soldering and apply AC - if it started, the chip was bad. Thermal intermittents are such a time saver. John Last edited by JohnCT; 08-21-2023 at 09:51 AM. |
#25
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Audiokarma |
#26
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In the case of the MCZ chips, they always responded to heat. Icing them after they were working would cause a shutdown. Very handy.
John |
#27
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But why "Sony" used bad MCZ chips and the competion made better chassies?
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#28
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on them. Either they didnt know or mods were to extensive. Panasonic had a similar dog apx 1990. SMPS IC's were going. There was a big kit. If you changed it & it blew again they would buy the set back. Too bad, it was the TOTL set & had an awesome pix. BTW after the first few generations of Sony they were just average reliability. They got easy to fix & very predictable. Toward the end of CRT's they got quite unreliable especially FBT's & CRT's 73 Zeno LFOD ! |
#29
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The Sonys that used the MCZ chips were not "bad" chassis specificaly, but most of the trouble we had with that chassis series was the MCZ chips, but there were also two 200V plus electrolytics on that board we used to change at the same time. Since Hitachi had less trouble with those chips and since the Sony used two and only one near the flyback was really the one that generally failed, I think the circuit that the chip was installed in was somehow tougher on the MCZ than it should have been, but Sony never issued a bulletin for a circuit change that would increase the life time. In any case, it didn't affect every Sony and most of them were at least a few years old when they failed. John |
#30
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Ops, I posted in the wrong thread......
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So many projects, so little time... Last edited by Alex KL-1; 06-07-2023 at 06:25 AM. |
Audiokarma |
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