Question about Toshiba 19A25 19" TV

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Toshiba 20as25 Dc voltage goes to 220v should be 115v

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  • Steve Allison
    Steve Allison May 11, 2010

    Your details are too sparse to do anything with; the message doesn't make sense.

    What DC voltage are you measuring and where? 


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Optoisolator is probably bad, horizontal out is bad also, check a transistor c3138 and change also

Posted on Aug 06, 2009

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If you measuring the secondary voltage will it 's a 115 volts

Posted on Oct 16, 2008

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hi good day

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you need to check the voltage output of your power supply section.This power supply supply is a switching type power supply.there is a chopper transformer in there.its supply is a dc voltage unlike any other transformer which is AC supplied on the primary..First step.
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2.Measure the secondary output.The out put is AC voltage the supply for the B+ going to plyback is 115vdc the second output is 12v run through a regulator and the regulator lower the voltage to 5vdc.this 5vdc supplies the system IC and the jungle IC.this ic process the switching of the plyback transformer and the plyback transformers output supplies the voltage of the whole system including your relay in the degaussing section....once the plyback is activated the tv will now turn on...

good luck!Hope i helped you..

please rate my help..god bless!

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