View Single Post
  #10   Report Post  
Posted to sci.electronics.repair
hr(bob) [email protected] hr(bob) hofmann@att.net is offline
external usenet poster
 
Posts: 3,236
Default Need schematic for Sony KV-1380R TV

On Dec 28, 8:36*pm, Sylvia Else wrote:
Franc Zabkar wrote:
On Sun, 27 Dec 2009 21:54:47 -0800 (PST), "hr(bob) "
put finger to keyboard and composed:


Just had a Sony Model KV-1380R given to me a couple of days ago. *Only
problem is simultaneous but intermittent horizontal and vertical
shrinkage of about 20%, on a random basis.


It sounds like the EHT is increasing substantially. Does the set have
separate horizontal deflection and EHT generation circuits? Is there a
H-stat?


http://www.repairfaq.org/samnew/tvfaq/tvsonyhstat.htm


http://www.repairfaq.org/samnew/tvfaq/tvmohstat.htm


- Franc Zabkar


Would also make the image brighter, wouldn't it?

Sylvia.- Hide quoted text -

- Show quoted text -


Sylvia:

It might, it is hard to tell if the image gets brighter since I have
never actually seen it make the transition from normal to shrunk.

Franc:

I will put my HV probe on the CRT HV cap and see if it varies. It
must be going up quite a lot to make that much difference in the
picture size. From my old TV days over the past 54 years, it is
almost always the reverse, the HV goes lower, and the picture gets
dimmer and noticeable bigger (blooming we call it on the west side of
the pond).