Facing TV Problems? Ask a TV Technician.
Hello there and welcome to Just Answer. My name is ***** ***** I will be assisting you today. I am an engineer with over 30 years of electrical and electronic training, repair and installation experience. I will try and answer your question accurately and precisely so that we can get you on your way.
Just so I understand, are you getting the 66 code now? I'm unclear.Thanks.
Ok, that could be a bad ballast however if you are hearing an audible whine, that may be indicative of bad bearings in the color wheel. And, if that wheel does not spin up to the specified RPMs, the ballast will not fire the lamp.Has the color wheel ever been replaced?Let me know.
The fans are not going to be loud. The color wheel spins up to 9000RPM and can sound like a siren in some situations.So with that info, does it sound like the wheel or a fan?
If you have a meter, we can check out the ballast.Do you have one?If so, we first need to check the high voltage connection to the board.Hold on while I get that info.
Ok, on the ballast you should have two connectors: CJ1 and CJ3.You should have 340V DC across pins 1 and 3 of CJ3.
Let's check that first.
The voltage should always be present. The ballast is then triggered by 5V coming in on pin 3 of CJ3.
Having said all that, when the ballast strikes, there is a 'spark gap' on the ballast board and you should observe a visible 'flash'. Check that first. If there is a flash and the lamp doesn't strike, then it is your lamp - which is usually a 66 code anyway.
The ballast is located in the actual light engine adjacent the lamp.I'll be here.
Hi, did we try to observe the spark gap?
Yes. I will be available after 6EST.
Ok, I'm here. Sorry, the snow has me outside shovelling :)
I'm in for the night now.
So where did we get to? Have you identified the ballast?
Ok, let me see if I can find a photo.
Ok, I found a video fo a V39 chassis which was the one after yours. The ballast is in the same spot. https://www.youtube.com/watch?v=y0arweAWnjE
Ok, the black and yellow wires are your 300+ VDC coming in. Set your meter to DC and measure that. You will need to turn on the TV.
No. You stick the probes down through the top of the connector.
I'm not a big fan of those meters/testers but you would be looking for about 300V DC across the black and yellow. Can you get hold of a meter that measures voltage and displays it on a digital readout? A multimeter in other words.
I'm emailed when you reply and try to get to a PC as soon as poss.
I'll be around for the remainder of the week.
Yes. That is perfrect. Home Depot and Lowes have meters under $30.