Question about Hitachi 57F500 57" Rear Projection HDTV-Ready Television
I have a Hitachi projection television, model 57F500A, serial V3K011368
Originally it had a convergence issue with 2 colors not lining up. I replaced the chips and had it working for about an hour when the picture and sound went out even though the red "on" light was still on. I opened it back up to now find a convergence resistor burnt (the RK54 which I examined to think was a Brown/Green/Gold), which I replaced and tried again, but still no picture or sound.
I still have the back off, so what I did notice was of the LEDs that light up (2 green on left, 2 green on back right, 1 red on near to me right) the closest of the back right green LEDs (D940) was blinking in sync with a ticking sound (like a spark but no fuel) and the near right red LED (D915) was dimming in sync with the ticking.
I read one of the responses here that it could be a fuse issue, there are two 5A 125V, and one 6A 125V. Is this the problem? If so I've called local stores about their fuse availability and I can get 5A in a 250V form, which I'd not prefer due to the point of the fuse. The other can come in a 6.25A slow blow, which I'm not sure what the TV requires.
Any suggestions would be appreciated.
Over the years of servicing these sets and others for Convergence issues, I have on several times gotten defective Convergence ICs. In your case where a Resistor is now open, (Probably a 1.5 ohm 1/2 watt), I would suspect you had gotten a hold of a defective IC. I would replace them both again. Make sure to use Heat Sink Compound between the ICs and Heat Sink.(Just a thin coating on the metal area) You can get the heat sink compound from Radio Shack. They should also have the Resistor you need.
Posted on Jul 25, 2009
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Posted on Jan 02, 2017
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