Videokarma.org

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

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 01-12-2018, 07:50 PM
Phil Nelson's Avatar
Phil Nelson Phil Nelson is offline
VideoKarma Member
 
Join Date: Jan 2006
Posts: 3,907
Schematic for Panasonic CT-1112 TV

Does anyone know where to find a schematic for a 1980-ish Panasonic model CT-1112 color TV?

It's a small tabletop that I bought when new. Still works fine except for occasional vertical instability. I suspect the cause may be an aging electrolytic, but I don't want to open it up and start shotgunning electrolytics, of which I assume there are many. And I'm not enough of an engineer to stare at the boards and say "Aha, that must be the one."

The Sams website doesn't list a manual for this set. Doing an Internet search for "Panasonic CT-1112 schematic" brings up a bunch of sketchy looking schematic sites that are plastered with ads and maybe worse junk.

Regards,

Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html
Reply With Quote
  #2  
Old 01-13-2018, 12:19 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 9,491
Most SS sets have the vertical output transistor/IC on a decent sized heat sink. One strategy, if you can't find the manual, is to google the heat sink mounted chip numbers datasheets until you figure out which is the vertical then change the nearby lytics.

Also, some sets will use the exact example circuit from the datasheet so if you can't get the TV's schematic you might be able to find the vertical's schematic in the chip datasheets.
__________________
Tom C.

What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4

Reading between the scan lines since the mid 2000's.
Reply With Quote
  #3  
Old 01-15-2018, 02:28 PM
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 3,001
Phil
Try the chassis number also. Should be inside on a white tag, sometimes also on the back.
One good trick with "no manual" is the parts designaters ( R###, D### etc).
Most sets come in blocks like IIRC
800 #'s power supply
400 #'s vert.
500#'s horz/hv
100#'s IF
When you find the vert out IC look for matching numbers.
Example Vert IC IC401. All other vert parts will have a 400 series number.
Odds are is a 'lytic or cold joints on the IC. While in there check for cold
joints under the FBT, very common.....
Those were great little sets. We sold Zenith but they only went down to
13" so we sold the Pannys, no regrets.

good luck
73 Zeno
LFOD !
Reply With Quote
  #4  
Old 01-18-2018, 05:02 PM
Phil Nelson's Avatar
Phil Nelson Phil Nelson is offline
VideoKarma Member
 
Join Date: Jan 2006
Posts: 3,907
Thanks for the tips. They give me something to work with.

This little set really has been an Energizer Bunny. This is the first hiccup during many hours of operation over the years.

Phil Nelson
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 12:11 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.