Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Rectangular Screen Tube Televisions

Notices

We appreciate your help

in keeping this site going.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #2  
Old 12-06-2007, 03:52 AM
dr.ido's Avatar
dr.ido dr.ido is offline
VideoKarma Member
 
Join Date: Mar 2005
Location: SE Melbourne, Australia
Posts: 550
It has lost vertical deflection, probably because the vertical output IC has failed (assuming there are no dry joints on or around the vertical output IC/yoke connector/flyback).

Replace the vertical output IC (probably a LA7838/LA7841/LA7845 or similar) and associated electrolytic capacitors. The vertical IC is usually powered by a winding on the flyback transformer via a fusible resistor and diode. If the original IC failed shorted it may have taken these out as well.

Many sets will blank the CRT under these conditions to prevent burning a line into the screen. Someone may have turned the screen control up (hence the dim lime) when fiddling.
Reply With Quote
 



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:26 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.