- Sansui QRS5500 quadrophonic receiver - 1 Update
- Article] Will HDR kill your OLED TV? - 2 Updates
| captainvideo462009@gmail.com: Jul 01 12:17AM -0700 > This is my own receiver. Last year it started taking longer and longer for the protection relay to activate and turn on the speakers I finally took it out of service. I recall that it had no other problems that were evident. I had posted this problem at that time and I think that it was Chuck up in Canada who nailed it immediately. He recommended changing C6 on the protection board and .that resolved the protect relay problem. Now however there is another problem that I never had before. Most of the dial lights including the signal meter light are out and that meter also seems to be inoperative as well. I never had any trouble with any lighting or the signal meter on this receiver. This is a big quadrophonic receiver. The switching is done through the main selector switch and it's a nightmare to get to. A real rats nest. Does anyone who has worked on these recall any common problems with lighting on one of these? I suspect a ground problem because so many of these lamps are in parallel but it's so crowded in that area you can't see anything. I Really appreciate any help. Lenny Chuck I took a leap of faith assuming that if the second 4 channel board fit mechanically it would work electronically. And to my great luck and surprise it did! I'm not sure if I now have two earlier or later versions of the quad boards in there now but they were apparently compatible. And the retrofit worked quite well too. The very slight "popping" noise that I had previously heard out of the rear speakers was gone, the dead rear channel is restored, and in fact the sound was clean through all the speakers. I have never heard "4 channel" out of this unit so this is going to be thrilling uncharted waters. Now I do realize that no one broadcasts 4 channel analog any more and I also know that sources to reproduce it including any records, or tapes, etc are probably few and far between anyway. But I was wondering if you might have any information on that? The guy that I bought the organ donor from included a large plasticized sheet with it showing all possible hookups. It also had brief explanations of all controls and their positions and there seems to be a couple of "synthesized" positions that according to this hookup sheet can apparently simulate 4 channel sound. I think that those look like "hall" and "surround". I do feel like When listening in some of these positions, perhaps I may be imagining it but the sound does seem to take on a whole new spaciousness to it. I recall hearing years ago when I first contacted Sansui for a service manual that the 5500 sold for over 900.00 back in it's hey day. In 1974 I was living in a small apartment over a restaurant with my cat. I wouldn't have been able to afford the carton to pack this in. So now after all these years I that finally own that has the capability to be used in ways that were not available to me before I don't really know what to expect from it. And so I was wondering if you might be willing to comment on that experience and maybe 4 channel analog in general. Thanks again. Lenny |
| John-Del <ohger1s@gmail.com>: Jun 30 07:32PM -0700 On Saturday, June 30, 2018 at 6:50:15 AM UTC-4, ~misfit~ wrote: > > original CCFL LCD TVs lasted many tens of thousands of hours. > At least I'll know where to get advice if / when my Samsung LED-lit LCD has > trouble before I want to replace it. I did a Samsung 40" yesterday that had only 3 LEDs out of almost 50 still lit.. If you're serious about extending the life of your TV, here's what you can do without a circuit current reduction mod: Watch a normally bright program (not some weird, dark, vintage movie) and lower the back light adjustment in the video menu to it's lowest possible setting. Watch the TV this way for 10 full minutes to acclimate yourself. Go back into the video menu and raise the backlight slowly until the picture just reaches an accurate and normally bright picture instead of the cartoonishly garish picture it had before. You'll probably find the setting is almost half of where it was. If you've had no LED damage up until now you will most likely extend the life of the LED array by tenfold, and your TV will probably have much better black level as well (assuming it's a globally lit array) |
| "~misfit~" <shaun.at.pukekohe@gmail.com>: Jul 01 05:37PM +1200 Once upon a time on usenet John-Del wrote: > I did a Samsung 40" yesterday that had only 3 LEDs out of almost 50 > still lit.. If you're serious about extending the life of your TV, > here's what you can do without a circuit current reduction mod: Thanks, I am. I'm on an invalid's benefit and am happy with my UA32D5000PM, I see no need to replace it in the near future. The picture is pretty good and it's just the right size for where it is. > you've had no LED damage up until now you will most likely extend the > life of the LED array by tenfold, and your TV will probably have much > better black level as well (assuming it's a globally lit array) Thanks for that, I'll have a play with it this evening. I seem to remember I've already got the backlight level set down a bit (having played with LEDs for years, knowing what I know...). Also I hate 'default' colour settings on TVs so modified all of the settings extensively when I first got it. Cheers, -- Shaun. "Humans will have advanced a long, long way when religious belief has a cozy little classification in the DSM*." David Melville (in r.a.s.f1) (*Diagnostic and Statistical Manual of Mental Disorders) |
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