[TechAssist] Re: Sony 41" PROJO, 1995 model, foggy picture

  • From: "Damon" <damon101@xxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Tue, 2 Mar 2004 06:57:18 -0500

First thing I suspect is the IK circuitry, it's setting the turn-on point of
the CRT's. Could be you had to crank up the screen controls to offset an
extremely high cutoff, which would indicate either a short, or the IK
indicating a short where there is none.

Check the cathode voltage with a blank video input on each crt, normal
voltage at cutoff is around 180-185, if this is way off on all or at least
one, then it's time to test all components in the IK, there's other tests we
can run........ BTW........a freakin' model number would've helped..... RA
chassis numbers are pretty sweet too.

Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815


----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
Sent: Monday, March 01, 2004 7:52 PM
Subject: [TechAssist] Sony 41" PROJO, 1995 model, foggy picture


> I did a service call on this Sony projo for a foggy, washed out picture.
> The set would also take 60 seconds to several minutes to come on and
> then the picture might blink as well.  I tested the picture tubes with
> my B & K model 467 picture tube tester and they tested OK.  So I decided
> to still boost them and they came up a little but when I looked at the
> picture it would not come on at all.  After adjusting the screens the
> picture came and to me looked the same:  foggy and washed out.  Why
> would the picture tubes test OK, but yet take a long time to come on and
> give a foggy picture?
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
>
>
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