Rembo picture comes in Samsung 21" TV. I have change all capacitor of vertical section & also LA78040, supply of vertical+14 & -14 is normal. I have also change base of crt but fault remain same.

SOURCE: CRT TV vert section

Hi,

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.

SOURCE: LG vertical failiure vertical line at the bottom of the crt

replace the vertical driver ic and the proccesor ic

The Knight

• 76851 Answers
• Posted on Oct 19, 2016

SOURCE: vertical color bars on half of TV, remain on black, 25v instead of 180v on CRT base, from LOT, 135 V ON LOT without CRT base connect, on videocon old CRT TV.

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. Check all the supply smoothing capacitors. Use of a high quality digital multimeter is recommended. Low quality ones will show false voltage readings, at high frequency.

wasaque ali

• 2 Answers
• Posted on Nov 15, 2017

SOURCE: How can i Set Haier tv, my haier 14'' CRT change With 21'' CRT so vertical Hight is short, how can i adjust vertical hight.. IC "Trident TDA 11105 PS/V3/3/AP3

Horizontal driver transformer voltage resistor 3.3k hot and born