[TechAssist] Sony KV-32xbr400 chassis DX1A No Pic, sound ok

  • From: "Moutons Electronics L.L.C." <moutons@xxxxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 16 Dec 2005 20:26:16 -0600

This TV came in with the complaint it was out. I played it for a week and it 
played just fine until today. It came on the light flashed several times like 
it always does during the warm-up of the picture tube then stayed on at which 
time it would usually pop on the picture, ofcourse this time it didn't. I 
thought it was out for a moment till I turned up the volume and it had sound. I 
look in the back and it had filament. So I don't know if the customer missed 
that or not so I am going with what I found. Every time I turn it on now I get 
no pic. 
I had a good picture, although not a new picture for this 5 yrs old set, it was 
good. Could this Sony be blanking the video like when the tube ages. I don't 
get the usual flashes of video like older ones. This is a Hi-Resolution model, 
never worked on one of these, no diagram. Is there a known way to defeat the IK 
circuit on these to see if I can get a picture? Does anyone know of a good way 
to troubleshoot this model for this problem? 

On older models you are able to turn up the screen to get the picture to 
override the IK circuit for a while but on this set I have varied the screen 
all the way up and down and all points in between and have no luck on getting a 
picture. 


Jason
Moutons Electronics



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