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Pioneer SX-205

Discussion in 'Troubleshooting and Repair' started by shorteddiode, Mar 24, 2011.

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  1. shorteddiode

    shorteddiode

    41
    0
    Mar 23, 2011
    Wouldn't turn on so I checked the ac side and found a bad solder joint at the main transformer. Now it turns on for a short time then displays "Power Off" I found an amp tansistor bad and replaced it (Q3) a 4.7 ohm resistor (R365) and transistor (Q303) Replace the bad parts and still says "Power Off" after a few seconds. Tested electrolytics and didn't find any bad. Anyone have any ideas I Need Help!!!!!
    Schematic at the link below.
    I decided to replace all the power amp transistors so Q1, Q2, Q3, & Q4 have been replaced, still goes to "Power Off"

    http://www.keepandshare.com/doc/show.php?j=1914&i=1617381&cat=1
     
    Last edited: Mar 24, 2011
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