Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Solid State CRT Televisions

Notices

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 11-22-2019, 09:37 AM
freakaftr8's Avatar
freakaftr8 freakaftr8 is offline
Convergence freak!
 
Join Date: Sep 2007
Location: Folsom, CA (no not in the prison)
Posts: 1,778
That was my assumption but I changed out all the capacitors on the neckboard just to be safe.. For the diode I'm considering on using a rectifier diode I'm looking at a 200 v 3a considering it runs on the rail of the 180v
__________________
Honey, turn on the tv.. I'm cold!
Reply With Quote
  #2  
Old 11-22-2019, 01:07 PM
zeno's Avatar
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 4,918
Lift the diode, its gotta have numbers on it. You need a fast
switching diode like the old ECG552. Got to use the right thing.
Sony often used small coils for a fuse / inductor.
Its probably the 200 V supply for the 3 drivers. Usually goes like this:
FBT winding to coil or low ohm resistor ( fuse) to anode of diode.
Catode to cap to GND typ 5 or 10mfd.
That goes to the CRT for the driver collectors. Thats it.
Sometimes the cap dont go tp GND but to the 120V main supply.

The symptoms are like 200V fail. You can get any of the following:
Brite with retrace then HVSD, shading, bleeding, jailbars, bad CRT look.
It a common problem in 99% of color TV's, all brands. It put many
cases of beer in the fridge

73 Zeno
LFOD !
Reply With Quote
Reply


Thread Tools
Display Modes

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 05:04 PM.



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