Question about Sony FD Trinitron WEGA KV-32HS510 32" TV
There is no white colour when viewing video, cable etc. however the onscreen menu works fine (all the colours are normal).
problem started intermittently and is now permanent. any ideas?
thanks in advance
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
How long have you owned the tv? You have two options though your best bet is to locate your nearest authorized service center to have the tv repaired.
Posted on Sep 14, 2008
Do you mean G-Y in the chroma circuit or the green in the RGB output stage to the CRT?
If it is the latter, and the green is obviously missing from the greyscale, then there is a fault on the RGB CRT base board, such as one of the amplifiers going leaky or open circuit.
If iit is one colour disappearing from the picture but all other colours are present, yet the greyscale tracking is OK (as in black and white with progressive shades of greys in between - this shows up clearly with the colour control set to minimum) then it would probably be the jungle IC and/or colour decoder IC. The best way to determine this is to observe people's faces on the screen. If they appear pink or overripe (too red) then it would be a jungle IC issue. If the greyscale appears to have a single colour caste all through it (example yellow or pink) then it would be RGB or the tube. It is a good idea to check all the electrolytic capacitors around these 2 ICs as well as all diodes. Don't forget to check the CRT socket for dry solder joints - this can also cause the loss of a colour within the RGB/greyscale.
Posted on Mar 03, 2011
Testimonial: "Thank you for your feedback. Not sure this is a DIY fix for my level of expertise."
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