Question about Sony MHC-GX555 Mini Hi-Fi System Shelf System

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Sony MHC-5900 Output Problem

Hi!

I have the Sony's MHC-5900 audio Hifi system and last week it started outputting an unclean audio sound (it appears to be "click and pop noise").

I've checked all the cables and connections and everything seems fine. I've realised that if I use the pre-amplifyer in the "Direct" sound mode, this noise doesn't appear in the outputs. However, when I switch to any audio DSP effect (Rock, Pop, ... ), the noise is heard again.

This system is more than 10 years old. May it be some electrolytic capacitors whose time life has expired in the pre-amplifyer? If so, which of them? Can anyone get me the schematics, for at least, the pre-amplifyer?

Regards,
José Oliveira.

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5 Suggested Answers

  • 1 Answer

SOURCE: Sony MHC-2800 setting the clock

Hi, it's simple. First press "Timer1" and Timer2" buttons together, clock on display will start blinking, by cursors "Up/Down" you can change the value of hours and minutes (switching between hours/minutes by "Left/Right" cursor). To save set time press "Memory". Enjoy your set clock :)

Posted on Jan 30, 2008

  • 45 Answers

SOURCE: not getting high depth of bass sony MHC-RV777d

I wouldn't expect huge bass from those little speakers. Somewhere on there, there's an equiliser, where you 'll probably be able to turn the bass up and down. See if that works. If not, new speakers may help.

Posted on Jan 08, 2010

  • 3287 Answers

SOURCE: What is the total WATT

According to page 24 of the manual, it delivers 11 Watts RMS (route mean squared) per channel into 8 ohm speakers.

Elsewhere in the manual, you'll see references to "15 watts per channel" and as much as "25 watts per channel". The 15 watt value is valid when putting up with some 10% THD (total harmonic distortion), this value is 11 times higher than the .9% THD value given for 11 watts per channel. You tolerate .9% THD now, but you wouldn't want to listen to anything with 10% THD. The 25 watts per channel is what they call "Music Power". Watts is an electrical term, "music power" is not. You could use it to compare other devices that only offer "music power" values, but the best indication of how it will perform is based on watts in RMS, into an 8 Ohm load (most speakers are 8 ohms). The lowest THD values are best.

From the manual:

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 8 ohm loads, both channels driven, from
70 - 20,000 Hz; rated 11 watts per channel
minimum RMS power, with no more than
0.9% total harmonic distortion from 250
milliwatts to rated output.

I hope this helped!

Posted on Nov 23, 2010

  • 21 Answers

SOURCE: Hi Thanks for your help, One year old Sony mini

OK, THE HEADPHONE PLUG HAS SOUND --- THIS MEANS EVERYTHING IS WORKING
UP TO THE FINAL AMPLIFIER INSIDE ------- IT HAS SPEAKERS LEFT AND RIGHT AND I
GATHER NEITHER HAS SOUND SO IT'S NOT A SPEAKER OR SPEAKER CONNECTION
PROBLEM .. MAY BE THAT THE INTERNAL FINAL AMPLIFIER HAS GONE BAD.
DID THIS HAPPEN AFTER PLAYING AT A VERY LOUD LEVEL ??? OR MAYBE PLAYED
IN A VERY HOT ROOM FOR A LONG TIME ?
NO SOUND FROM RADIO OR CD ?? SOUNDS LIKE IT NEEDS TO GO TO SONY FOR
AN AMPLIFIER REPLACEMENT ..............

Posted on Jun 10, 2011

  • 6771 Answers

SOURCE: Sony CMT-GP5 subwoofer output very quiet

From the description the subwoofer is the problem, since the item is new return it to the place of purchase, this is a manufacture issue.

Posted on Aug 13, 2012

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