Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Vintage TV & Radio Tech Forum

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 05-05-2016, 06:53 AM
TranStar's Avatar
TranStar TranStar is offline
VideoKarma Member
 
Join Date: Feb 2016
Posts: 20
Ge TV question

I have a GE channel master (21C2478). I've recapped the whole thing and sound comes through but there is no picture (although there is a flat line going horizontally across if you adjust the brightness to a certain point
Reply With Quote
  #2  
Old 05-05-2016, 07:48 AM
Kamakiri's Avatar
Kamakiri Kamakiri is offline
Administrator
 
Join Date: Jun 2002
Location: Buffalo, New York
Posts: 5,109
Not familiar with that exact model, but see if there's a service switch on the back of the set......
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
Reply With Quote
  #3  
Old 05-05-2016, 08:01 AM
zeno's Avatar
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 4,720
Was it like that before ?
If not the service switch ( not all sets have one, B&W's dont)
its a vertical problem. Post a few chassis pictures & maybe
things will come to mind.

73 Zeno
Reply With Quote
  #4  
Old 05-05-2016, 09:56 AM
TranStar's Avatar
TranStar TranStar is offline
VideoKarma Member
 
Join Date: Feb 2016
Posts: 20
pics

Here are some pictures of the tv
Attached Images
File Type: jpg 20160505_064154.jpg (63.5 KB, 41 views)
File Type: jpg 20160505_064214.jpg (46.7 KB, 23 views)
Reply With Quote
  #5  
Old 05-05-2016, 10:49 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 14,820
Vertical deflection failure. Check the vertical stage tube(s), resistors, vertical output transformer and replace parts out of tolerance. Also may want to confirm B+/B++ rails to the vertical are working and within %30 tolerance of rated values. Also check your cap work in the vertical for mistakes.

Can you make that line bright? If you can, good, but don't let it stay bright for more than a second or you will burn that line permanently into the phosphor. If you can't make it bright HV is low, CRT is not being driven properly or CRT is bad.
__________________
Tom C.

Zenith: The quality stays in EVEN after the name falls off!
What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
Reply With Quote
Audiokarma
  #6  
Old 05-09-2016, 10:09 AM
DavGoodlin's Avatar
DavGoodlin DavGoodlin is offline
Motorola Minion
 
Join Date: Aug 2011
Location: near Strasburg PA
Posts: 3,413
Some capacitors look to be replaced, make sure the old ones are snipped out. Also make sure new cap value is correct on the yoke, and remove the white tubular.
Is that 15M5 or M6 stamped below the 5U4? I may have a schematic for this set so you can do a check.
__________________
"When resistors increase in value, they're worthless"
-Dave G

Last edited by DavGoodlin; 05-09-2016 at 10:11 AM. Reason: saw more on yoke
Reply With Quote
Reply



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 10:11 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.