Question about Toshiba Televison & Video
The 25" CRT-TV is used TA1268N/TA8427K(Toshiba IC) .there is vertical linearity problem .upper side of screen is extended,but lower side of screen is normal. which components needed replacement???? This TV has not component of adjust vertical linearity.
Check and replace all the electrolytic capacitors at its vertical scan output section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box.
Posted on May 18, 2014
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: CRT TV vert section
Vertical linearity is more of a DCV bias issue rather than feedback or AC coupling. Hence it would be more apt to suspect resistors rather than capacitors. Of course, it is also possible that the large IC that drives the Vertical output maybe at fault (least likely) but often would have trimpots for adjustment. Most current designs do away with trimpots and rely on self correcting (feedback loop) which is simply a resistor in the 100k range. In certain instances, it could be a thermistor or resistor or diode limiter attached to the yoke itself.
Best would be to use a service manual or at the very least a schematic diagram with voltage readings and compare actual on PCB against schematic.
If you could post back the make & model or preferably the chassis number of the TV, might be able to comment back known common vertical issues.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.
Posted on Jun 06, 2008
Get the full number like AN5521 etc and contact Suburban Electronics (internet catalog and 800 number) or with same number search for parts dealer nearer to you--Suburban is in USA>.
Posted on Apr 20, 2012
Tips for a great answer:
Jan 18, 2011 | Durabrand BH1304D 13" TV
Feb 15, 2010 | Toshiba 36A40 36" TV
Oct 05, 2009 | Toshiba CF35F40 35" TV
Sep 28, 2009 | Toshiba CN36Z71 36" TV
Sep 29, 2008 | Toshiba Televison & Video
Jun 05, 2008 | Televison & Video
Jun 01, 2008 | Toshiba 36A50 36" TV
Jun 18, 2007 | Toshiba 27DF46 27" TV
Sep 21, 2017 | Toshiba Televison & Video
58 people viewed this question
Usually answered in minutes!