Question about Televison & Video
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. The search result will display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.
Posted on Jan 03, 2017
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Posted on Jan 02, 2017
Hi you have lose solder in yor vertical section have a tech resolder it or that problem will cost you .hope you have already have it remedied.
Posted on Mar 23, 2007
vertical problem need to check for bad solder joints on vertical ic would be helpfull if we had the model number o f yur set. also could be bad capasistors in vertical section.
Posted on Mar 09, 2009
You have a failure in the vertical deflection circuit. This could be either a bad vertical chip, the power supply that runs the chip or a bad capacitor in that circuit. This is usually a repair best left to a professional. There is a small possibility that it could be bad solder connections. If genlty tapping the unit temporarily solves the issue you can try and resolder the pins on the vertical chip LA7841 is the part number. There is also a resistor 1 ohm 1 watt. If that resistor is open you can assume the IC is bad
Posted on Mar 12, 2009
If you can do it, then just reheat or resolder the vertical ic pin for first step. If this work then no need to change the IC. Good soldering technique is needed. Do this when unit is no power and unplugged from wall socket.
Remember nasty voltages inside, it might caught you.
Posted on May 25, 2009
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