Question about Televison & Video
5tyems blinking no disply dc voltag it is ok how can fix
Can you please give brand and model and a description of what set is doing or not doing?
Posted on Nov 05, 2012
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Posted on Jan 02, 2017
check for a resistor rated around 220kohms somewhere around the flyback area. i have never worked on this model tv before so i cant give you an exact part number on the board but had the same problem with sharp tvs
Posted on Nov 21, 2008
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Nov 14, 2010 | Sony FD Trinitron WEGA KV-36FS120 36" TV
Apr 27, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV
Mar 29, 2009 | Sony FD Trinitron WEGA KV-36HS420 36" TV
Oct 03, 2008 | Samsung HL-P6163W 61" TV
Nov 14, 2007 | Toshiba 36A43 36" TV
You have a problem with the three factors, and they are screen voltage, focus voltage, and control (focus 2) voltage. Basically these voltages have to be adjusted since the components in this section have aged some. These controls are usually located in the television on the IHVT (Integrated High Voltage Transformer) or as it is also called the flyback transformer. these controls must be adjusted together, along with the color controls. Here is how the adjustment is done (You will need a schematic diagram, a DC volt meter, and a color bar generator to do these measurments):
1) turn color and tint fully counter clockwise until you have a black and white picture.
2) connect the color bar generator to the TV (ch 3) and turn it on, you should see bars in various shades of gray
3) adjust as best as possible the color and tint controls to obtain the color bars on the screen Red Green Blue.
4) measure the voltages on the focus, screen and control grids of the CRT and match them to the schematic digram measurements.
5) adjust the focus screen and control grids to match the ones on the schematic diagram
6) once this is done then you adjust the color controls once again to obtain the red green and blue bars on the TV screen.
This should help if the CRT (picture tube) electron guns are still good and if the flyback transformer voltage supply is working.
However if you do not have a background in electronics please take the TV to a shop for repairs.
I hope this helps,
Oct 16, 2007 | Sony KV-20M20 20" TV
Most of the time TV problems arise by power supply noise. This noise in the supply is usually caused by Electrolytic Capacitor failure. If you are technical, you can get the schematic and look for the voltage regulator circuits. Measure the voltages with a DVM using both the DC and AC settings. If the DC setting is lower than normal, you will probably see about .5 to 1v of AC voltage on the line. Look for the large capacitor in the regulator circuit and replace them. Cost about $.50 each. Get new caps with slightly higher voltage rating (if they will physically fit).
Oct 16, 2007 | Mitsubishi VS-45609 TV
Mar 20, 2006 | Daewoo DTQ-25S3FC 25" TV
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