Sony KV-36XBR400 bad focus in part of screen: help needed

[optonline]

Since last week, there is a rectangular area in the screen, about 10-12
inches wide,
that runs from the top to the bottom
of the screen (approximately 6 inches from the left side) that has bad
focus.
The text in that area appears blurry. Small text is unreadable.

This happens for all the inputs, including HDTV and the green TV menus.
The colors are correct. The CRT has excellent focus in other areas of the
screen,
including the corners. The situation is not terrible yet, but I would like
to fix this.
The only thing I can think of that happened last week is that it was very
hot and humid.

Is this a sign of a bad CRT, or can this be adjusted? I recently found the
service manual for this
model, so with some good advice I may be able to make adjustments.


thanks

 

[[email protected]]

Tv needs the dynamic focus correction circuit repaired. Sony uses
those and probably the left coils have gone bad or are disconnected
internally.

Any experienced Sony DTV technician that has attended Sony's factory
training on the XBR series will have the knowledge and skill required
to diagnose and repair the failure. Some well experienced technicians
that did not attend Sony's training may also have enough knowledge on
the type of circuit in use.