[TechAssist] Re: Sony KDP57XBR8 Shrunken Image : Update

  • From: "Damon" <damon101@xxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Sat, 3 Apr 2004 22:39:23 -0500

Check your video IC's b+ supply too.
may be low

Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: "Tech Assist Group" <techassist@xxxxxxxxxxxxx>
Sent: Saturday, April 03, 2004 9:25 AM
Subject: [TechAssist] Sony KDP57XBR8 Shrunken Image : Update


|
| Make : Sony
| Model : KDP57XBR8
| 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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