Question about Sony KV-36FS16 36" TV
This might be caused by the CRT or by the chroma circuitry. You will need a schematic diagram and a multimeter set to read voltage. The first thing would be to look at the voltages on the CRT socket. With the TV on and the back off, using the schematic measure the voltages on the CRT socket and see if they match the schematic, if they do not (and they wont) find out if the Red Cathode voltage is too high of to low. If too high the red video circuitry might be at fault if too low the CRT might have a Cathode to grid short. In either case power down the TV and with determine if the CRT is bad (using a CRT Tester / Rejuvenator) Run a series of test acording to the instructions of the CRT Tester. This will tell you if the CRT is bad and if it is bad what problem it actually has. Then you may or may not have to rejuvenate the CRT (follow the instruction on the Tester / Rejuvenator) to do this. If the CRT is not bad then you will have to test the chroma video circuitry to see which component is causing the problem.
As you see you will need some equipment to do the job with. and you will have to have a little bit of an electronics background, If you do not have these I would suggest that you take the TV to a qualified TV repair shop for servicing.
I hope this helps,
Posted on Oct 31, 2007
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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
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