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JoyrexJ9
2007-07-07, 01:37
Just got my SB3 and it's a loverly bit of kit.
I've got it showing the weather/date/time when in standby, but I'm concerned this could lead to some form of screen burn, like on a CRT or plasma display.

I've had a search round the forum and I can't find anything on this topic, so I assume it's a non-issue?

Cheers!

erland
2007-07-07, 02:16
Some threads related to this:
http://forums.slimdevices.com/showthread.php?t=7614
http://forums.slimdevices.com/showthread.php?t=10573
http://forums.slimdevices.com/showthread.php?t=32597

JoyrexJ9
2007-07-07, 07:22
Thanks for the links...

Sounds like it could possibly be a problem but no one can confirm for sure. If there was ever a problem I guess by the time it developed (say 2 years) the device will be obsolete anyhow.

Cheers.

funkstar
2007-07-07, 08:42
Have a look at the release dates for different models:
http://wiki.slimdevices.com/index.cgi?HardwareComparison

Other than a few isolated reports of bad screens, there hasn't been any problems so far. And that with teh SB2 being out for over 2 years now (SB2 and SB3 share the same hardware, just the form factor changed).

JimC
2007-07-07, 11:37
Have a look at the release dates for different models:
http://wiki.slimdevices.com/index.cgi?HardwareComparison

Other than a few isolated reports of bad screens, there hasn't been any problems so far. And that with teh SB2 being out for over 2 years now (SB2 and SB3 share the same hardware, just the form factor changed).

A VFD's useful life (defined as producing 50% of the original amount of light when the same voltage is applied) is typically rated at 40,000-100,000 hours of operation. With 8760 hours in a year, that's a minimum of 4.5 years of continuous operation.

You can extend the useful life beyond the rated period by making sure that the dots (grid locations) used change over time. This happens naturally on the SB2/SB3 as the clock changes, as RSS feeds scroll across, as you use the device, etc. You can also extend the useful life by driving the display at lower voltages (or blanking the display) when the unit is not in active use, which we also do on the SB2/SB3.


-=> Jim

azinck3
2007-07-07, 12:47
Thanks for the links...

Sounds like it could possibly be a problem but no one can confirm for sure. If there was ever a problem I guess by the time it developed (say 2 years) the device will be obsolete anyhow.

Cheers.

My 2 SB1g's show slight-to-moderate burn-in where the time gets displayed. My regular SB1 doesn't seem to show this but I suspect it's because it's tougher to detect on the character-based display.

peterw
2007-07-07, 13:16
A VFD's useful life (defined as producing 50% of the original amount of light when the same voltage is applied) is typically rated at 40,000-100,000 hours of operation. With 8760 hours in a year, that's a minimum of 4.5 years of continuous operation.


Thanks for the info. That's actually a shorter period than I expected. I hope you'll offer replacement service or kits, especially for SB3s that have to be run at brighter levels than the old SB2 units. Given how long my Squeezebox 1 has been in service, I expect the usable lifespan of the SBs themselves may exceed the VFDs. :-)



You can extend the useful life beyond the rated period by making sure that the dots (grid locations) used change over time. This happens naturally on the SB2/SB3 as the clock changes, as RSS feeds scroll across, as you use the device, etc. You can also extend the useful life by driving the display at lower voltages (or blanking the display) when the unit is not in active use, which we also do on the SB2/SB3.


The dots might change on the numbers, but not where the ":" is, since the time is always centered on the display, right?

Lower voltage: you mean "dimmer" brightness levels, right? The default brightness settings are to dim less than Brightest when Off or Idle, but a user who has all modes set to Brightest is always applying the same (higher) voltage, right?

Thanks!

Peter

funkstar
2007-07-07, 13:17
A VFD's useful life (defined as producing 50% of the original amount of light when the same voltage is applied) is typically rated at 40,000-100,000 hours of operation. With 8760 hours in a year, that's a minimum of 4.5 years of continuous operation.

You can extend the useful life beyond the rated period by making sure that the dots (grid locations) used change over time. This happens naturally on the SB2/SB3 as the clock changes, as RSS feeds scroll across, as you use the device, etc. You can also extend the useful life by driving the display at lower voltages (or blanking the display) when the unit is not in active use, which we also do on the SB2/SB3.


-=> Jim

Good info Jim, thanks :)

stormy
2007-07-07, 14:28
Be thankfull, you could get this! :(

http://img510.imageshack.us/img510/6220/sb2qi6.jpg

funkstar
2007-07-08, 08:29
One off faults happen. This tends to be either early on in a components life or after a significant period of time. Your problem isn't a longevity issue :)