Digest for sci.electronics.repair@googlegroups.com - 7 updates in 2 topics

Chris K-Man <thekmanrocks@gmail.com>: Aug 25 12:04PM -0700

Onkyo TX-SV70 Pro Amp-Tuner - Display But No Sound
 
The owner states that "all the buttons do something" on
the front display when she presses them, but she hears no
sound out of the speakers attached to it.
 
I asked her to make sure she had selected the correct speaker
group(A or B). Still no sound. She was tuned to a known good
local radio station.
 
Any other suggestions?
Phil Allison <pallison49@gmail.com>: Aug 25 02:23PM -0700

Chris K-Man wrote:
=================
> group(A or B). Still no sound. She was tuned to a known good
> local radio station.
 
> Any other suggestions?
 
** Speaker relay not closing is likely.
Blown internal fuses another.
 
 
....... Phil
whit3rd <whit3rd@gmail.com>: Aug 26 02:18AM -0700

On Wednesday, August 25, 2021 at 12:04:07 PM UTC-7, Chris K-Man wrote:
 
> The owner states that "all the buttons do something" on
> the front display when she presses them, but she hears no
> sound out of the speakers attached to it.
 
So, she's tried the 'tape monitor' button, and that didn't fix the problem?
Chris K-Man <thekmanrocks@gmail.com>: Aug 26 02:53AM -0700

On Thursday, August 26, 2021 at 5:18:59 AM UTC-4, whit3rd wrote:
> > the front display when she presses them, but she hears no
> > sound out of the speakers attached to it.
> So, she's tried the 'tape monitor' button, and that didn't fix the problem?
______
 
I'll check all that when I visit the customer
abrsvc <dansabrservices@yahoo.com>: Aug 26 06:19AM -0700

On Thursday, August 26, 2021 at 5:53:39 AM UTC-4, Chris K-Man wrote:
> > So, she's tried the 'tape monitor' button, and that didn't fix the problem?
> ______
 
> I'll check all that when I visit the customer
The easiest thing to have the customer check is the sound of the protection relay releasing/engaging. Turn on the unit and listen for a click. If none, then there is a problem with the output section and the protection circuit is engaged preventing the speakers from connecting. This can be caused by many things in the output section.
 
When you get this for repair, look at the driver ICs (uPC1298V) for poor connections. This is a common failure point. Check any voltage regulators for poor connections as well.
 
Dan
"ohg...@gmail.com" <ohger1s@gmail.com>: Aug 25 10:09AM -0700

On Sunday, August 22, 2021 at 7:12:36 AM UTC-4, Chris K-Man wrote:
 
> I have an interesting question for all of you:
 
> What do you think of the quality/characteristics of the picture
> you see on new TVs on display in stores?
 
They're cartoonishly inaccurate - but intentionally so. When there are 50 displays on the wall all running at the same time, the one with most bizarre colors and brightness is the one most people will pick as the best picture.
 
When setting up a new TV for home, most have a "home" or "store" or "demo" option. The home setting sets the LED array brightness to 100% by default. The store or demo mode sets it for 110 plus percent for the same reason.
 
I remember the time my softball team was at a bar after a game, and they had a Sharp Aquos 60" in default settings. The grass on the infield of the game we were watching that was on was a weird fluorescent green, the blacks were dark blue, and it was overly bright. One of the guys was impressed with that mess of a picture and asked if I could adjust his Sony to look like that. I said I could try, but wasn't sure if I could get his Sony to look that bad on purpose. He of course was shocked but when I asked if he ever saw grass that color, the light went off.
Chris K-Man <thekmanrocks@gmail.com>: Aug 25 12:09PM -0700

> They're cartoonishly inaccurate - but intentionally so. When there are 50 displays on the wall all running at the same time, the one with most bizarre colors and brightness is the one most people will pick as the best picture.
 
> When setting up a new TV for home, most have a "home" or "store" or "demo" option. The home setting sets the LED array brightness to 100% by default. The store or demo mode sets it for 110 plus percent for the same reason.
 
> I remember the time my softball team was at a bar after a game, and they had a Sharp Aquos 60" in default settings. The grass on the infield of the game we were watching that was on was a weird fluorescent green, the blacks were dark blue, and it was overly bright. One of the guys was impressed with that mess of a picture and asked if I could adjust his Sony to look like that. I said I could try, but wasn't sure if I could get his Sony to look that bad on purpose. He of course was shocked but when I asked if he ever saw grass that color, the light went off.
_______
 
Good call - with the grass that is!
 
So how can I, among many people, help turn the tide against public
acceptance of such a garish factory image - be it Home or Store mode?
 
I would estimate, since the mid-2000s, that millions of consumers
automatically associate such overblown settings with HD and or 4K.
How to educate them otherwise?
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