[TA-A] Re: Hitachi 50UX27K CHASSIS AP63 no picture

  • From: Ask Later <grubsx5@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 15 Oct 2007 15:07:23 +0000

> From: grubsx5@xxxxxxxxxxx> To: techassist@xxxxxxxxxxxxx> Subject: [TA-A] 
> Hitachi 50UX27K CHASSIS AP63 no picture> Date: Thu, 27 Sep 2007 18:14:18 
> +0000> > > > > > > > Hitachi 50UX27K chassis AP63 > > No picture on any 
> inputs or menu but magic focus screen comes up and does> its cycle there is 
> video signal at the CRT boards but I don't know if the> signals are within 
> specs. CRT's have heaters and good screen g2 and there is> audio. Any help 
> would be appreciated. > > Thank You! > > Tony's Tv Repair > > Found the 
> problem the ABL circuit all heat zinks were cold on the three video output 
> boards found negative voltages on Q304 signal  SUB board and IC I501 p4 was 
> 2.25v should be 7v. Traced ABL back to R708 on the power supply/Deflection 
> board can't remember Value 47k or 470k 1/2 watt Replaced and looking good!  
 
Thanks for all of your input!
 
 Tony's Tv Repair> > > 
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