[TechAssist] Re: FIXED : Sony KDP57XBR2 Shrunken Image : Update
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 8 Apr 2004 07:55:53 -0400
On Signal Board There Are Several Heatsink Mounted Regulator IC's
Found IC3005 +9V Regulators Output Down To 3.5VDC. Generic Part # PQ09RF21
The Ink on R3073 1ohm 2W Resistor On The Pin 1 Input Was Faded From Heat
Stress And had Increased in Value up to 3.5 Ohms.
Replacing Both Parts Fixed Problem
Thanks to Damon Brunger for the tip!
==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd
----- Original Message -----
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: "Tech Assist Group" <techassist@xxxxxxxxxxxxx>
Sent: Saturday, April 03, 2004 10:38 AM
Subject: [TechAssist] Sony KDP57XBR2 Shrunken Image : Update
>
> Make : Sony
> Model : KDP57XBR2
> Problem : Reduced Height and Width
>
>
> http://www.members.aol.com/jstielau/Sony
>
> A picture of the problem : Click above ...... As you can see , the
> vertical size is 1/2 of what it should be and the width is in also.....an
> elliptical shaped image!
>
> Went there yesterday for a basic checkout....didn't have service data with
> me....I now do.
>
> A quick check of B+ levels from the main power supply board revealed no
> problem there
>
> Main B+ is right at 135V , + & - 22V lines are at 20.5 ( should be OK) , +
> & - 15V lines are in spec also.
>
> Disconnecting convergence coils made no difference....just made the
picture
> unconverged at best!
>
> If this was an early model set I'd bet the jungle IC was the problem!
>
> Going into service mode , the vertical size does respond but does not fill
> the screen......
>
> Looks like the drive levels are way to low.
>
> Any thoughts or experience on this newer set would be helpful. Going
> back Monday with the manual....will pull the tubes and chassis if need be.
> No lightbox :-(
>
> ==========================
> Jeff Stielau
> Shoreline Electronics Repair
> 344 East Main Street
> Clinton,CT 06413
> 860-399-1861
> 860-664-3535 (fax)
> jstielau@xxxxxxxx
> ========================
> "If you push something hard enough it will fall over."
> Fudd's First Law of Opposition - Sir Sidney Fudd
>
>
>
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