Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early B&W and Projection TV

Notices

We appreciate your help

in keeping this site going.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #26  
Old 01-30-2017, 01:09 AM
ZackN920's Avatar
ZackN920 ZackN920 is offline
VideoKarma Member
 
Join Date: Jul 2014
Location: Stephenson County, IL
Posts: 242
Quote:
Originally Posted by Phil Nelson View Post
So, it worked (full raster) when you put it away, and then the vertical collapsed when you brought it out and tried it again?
Yup

Quote:
Originally Posted by Phil Nelson View Post
I'd look for a loose or broken connection somewhere. Have you tried wiggling the tubes? Did you ever clean the tube pins & sockets? Did you clean controls (such as vertical hold)? Is it possible that a blob of solder or a snipped wire stub fell into the wrong place and made a short circuit? Eliminate simple/obvious causes like that before you start chasing more exotic issues.
I did all of that previously. No blobs of solder...I'm very careful about that.

Quote:
Originally Posted by Phil Nelson View Post
I would also put back the resistor that you eliminated. Parts are there for a reason.
That resistor was not original to the set, and therefore was not even listed in the schematic. It was one of the resistors I put in when I took the celenium rectifiers out and replaced them with diodes.

Quote:
Originally Posted by Phil Nelson View Post
If your service manual includes a voltage chart, how about checking the voltages on the vertical tubes? Same deal if the manual has a resistance chart.
Still haven't gotten to checking voltages while on, but did check resistances. Did not help at all. Everything was off, making me think my schematic is wrong for the set. I expected to find a few values off, but not everything!

I did find the reason though. There is a shielded wire that runs from the vert out. tube to a lug with some caps on it, and I found that the outer shielding of the wire was shorting to the inner. Seperated the two at the end of the wire and BAM! Full deflection back
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 12:28 AM.



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