Question about Sony MHC-GX9900 Shelf System
My Sony MHC-GX9900 system always shuts off automatically when I turn on the power and the power icon flashes red/green. I reset the system according to the manual by pressing the power button+stop+enter and it don't fix the problem, please let me know if there's anything I can do and if anyone else had a problem like this before!
System detects power rail irragularities.E.g +5ve the fault is in power supply section.
Posted on Dec 17, 2007
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Posted on Jan 02, 2017
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Nov 12, 2015 | Sony MHC-GX9900 Shelf System
Apr 06, 2012 | Sony MHC-GX9900 Shelf System
Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
Apr 01, 2011 | Sony MHC-GX9900 Shelf System
Register and download the manual for free at retrevo.com
See Page 40.
"AUX" is just a generic label for any Line Level Input. On this unit that would be Video/MD (Audio In) or TV (Audio In).
Feb 27, 2011 | Sony MHC-GX9900 Shelf System
Feb 13, 2011 | Sony MHC-GX9900 Shelf System
Jan 22, 2011 | Sony MHC-GX9900 Shelf System
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