Question about Emerson EWF2704 TV
How can i fix a black screne tv, but one line horizontally with sound is working
This is a vertical deflection problem, These are the possible causes:
1) bad vertical coupling capacitor
2) bad vertical output IC
3) bad vertical driver IC
4) bad CRT deflection yoke
1) using the TVs schematic locate the driver IC the output IC and the CRT yoke transformer.
2) using an oscilloscope look at the vertical driver signal it should be a sawtooth signal from the driver to the yoke (increasing in amplitude for each section, i. e. driver and output).
3) if no sawtooth patter is seen that is your problem, look for the component in the section where signal is entering but nothing is coming out.
4) replace the components
Now let me tell you something, don't continue to play the TV with the line present with brightness applied, this will burn the image of the line into the phosphorous coating of the CRT.
I hope this helps
Posted on Nov 01, 2008
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
Tips for a great answer:
Dec 19, 2015 | Samsung HP-R5072 50 in. Plasma HDTV
Feb 25, 2015 | Emerson EWF2004 20" TV
Jul 19, 2014 | Emerson LC260EM2 26" LCD TV 1366x768, 60...
Oct 18, 2010 | Emerson Televison & Video
Sep 08, 2009 | Sharp Televison & Video
Dec 03, 2008 | Emerson EWL3706 37 in. LCD Television
Jul 16, 2008 | Emerson EWF2004 20" TV
Jan 20, 2008 | Emerson EWF2703 27" TV
Mar 10, 2017 | Emerson EWF2704 TV
543 people viewed this question
Usually answered in minutes!