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Problem wiht hi-fi Stereo-Please help
2/6/2005 12:48:07 PMKris
Hi,
I am new to this forum. I need some help with my stereo. I have a Phillips FWC550. The system had a problem. When I turn the power on, it would go to stand-by within 3 seconds. I figured out the problem was because of a bad capacitor. So I replaced a 4700uf/50v capacitor with a new one. Now the system does not go to stand-by automatically as it did before, but is giving a different kind of problem.
When I turn the power on, all the lights in the controls light up(except for the main LCD, which seems to glow very little, you can see it only in the dark) but the system is not responding to any controls except for the power switch. The CD tray wont open, nor the tape decks work, but when I change the controls, I can see the changes in the LCD panel(though only in the dark). I have a gut feeling that there is not enough power supply to the Amp or the LCD.
I really appreciate any kind of help or suggestions on what is causing this problem and how could I fix it. Thanks.

Kris.

2/6/2005 8:56:15 PMThomas Dermody
Did you put the new condenser in properly? If you put an electrolytic condenser in backwards, it'll short out the power supply. Observe the + and - symbols. Keep in mind that when you put an electrolytic condenser in backwards, you take the chance of damaging either or both the condenser and the power supply.

T.D.

2/7/2005 12:18:25 AMJohn McPherson
Hi,
If the condensor is correct, check to see if the rectifiers or bridge rectifier of the power supply are all okay, or if one has opened, or shorted. Look for evidence of excess heat or soot. If you can identify a voltage regulator, check to see if the output voltage is correct for that regulator rating.

If thes items all check okay, power the unit down, unplug it, and while avoiding contact with any bare wires, see if you can locate component that seems hot.


:Did you put the new condenser in properly? If you put an electrolytic condenser in backwards, it'll short out the power supply. Observe the + and - symbols. Keep in mind that when you put an electrolytic condenser in backwards, you take the chance of damaging either or both the condenser and the power supply.
:
:T.D.



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