[TechAssist] Re: Panasonic CT-31SF13U FIX

Had something simmilar in a Zenith a couple of months ago that had a burr on 
the heatsink for the STR53041 regulator (this was a late chassis 9-19xx 
series with the regulator in the front right poartion of the board) the burr 
damaged the Mica insulator and caused it to short at power on blowing one of 
the power resistors it was a real pain to find too.

Peter Oliver
Tucson Radio TV






From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] Panasonic CT-31SF13U FIX
Date: Fri, 31 Jan 2003 10:38:44 -0500

  Set came in dead, found D552 shorted and replaced.. Fired set  up with 
varac, came on and went dead... Output transistor checked ok....Thought 
maybe transformer was bad...Scoped horiz drive to the  output every checked 
ok until set went dead....Removed output transistor cleaned compound from 
back.. Dam, it had a pinhole and shorting out at turn on....Hope this helps 
someone else..

Bob,

Bobs TV   Worcester, ma

woodman1@xxxxxxxx

Main  508-853-1482
Fax    508-853-1480
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