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Sony KDP57XBR8 Shrunken Image

  • Thread starter Shoreline Electronics
  • Start date
S

Shoreline Electronics

Jan 1, 1970
0
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)
[email protected]
========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd
 
S

Shoreline Electronics

Jan 1, 1970
0
KDP57XBR2.......not XBRB is the correct model #!


==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
[email protected]
========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd
 
S

Shoreline Electronics

Jan 1, 1970
0
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

==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
[email protected]
========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd
 
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