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Sony KV-36HS500 TV

I am having some problems with this 36" tv. Sometimes it will turn on and sometimes it won`t. I had it on all day last Sunday and shut it off and the next day it would not turn on. It will make the usual clicking noises from the relays and the standby light blinks, but thats it. I have tried to hit the side to see if I had a bad solder joint or to see if something might be loose, but it was no use. I do have a service manual for this and according to the 7 blinks from the standby light it indicates "horizontal deflection stopped". I just wanted to check to see if someone might have run into this problem on this series of tv before I jump in and start checking things. Thanks, Rob

Reply to
Rob
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Once i've had a similar problem with a Philips TV set, and it turned out to be a very thin crack in the solder joint on the flyback, very difficult to see, and gave very odd symptoms a bit like the ones you're describing. A magnifier might help to see these cracks. Otherwise, supply problems, try to see with a scope how is the supply of the flyback.

Hope it helps. Good luck!

Reply to
electrotech

Most likely one of the regulator ICs. You need to start by changing the MCZ3001D in both the HV and Horizontal drive circuits. They are cheapest if you buy them under the Hitachi part number rather than the Sony, which I do not recall at this time.

If that is not the fix, you could have any number of problems and these are difficult to troubleshoot. The next most likely thing would be the flyback. The ICs fix most of them.

Leonard

Reply to
Leonard Caillouet

Thank you Leonard, I heard something before in reference to an IC in the power supply. I will pop them in and hope as this is a very complicated piece of equipment. I been working on electronic equipment for years, but this would be a head ache for the most experienced! Rob

Reply to
Rob

Thank you for the tip. Thats what I was thinking at first, but I figured by hitting it on the side would have some effect if it were just a loose solder joint. It still didn`t do anything, but I have seen bad solder joints where hitting it had no effect. I had someone else tell me about the regulators on this set. I had read something about that at one time on the web somewhere. I am going give that a shot. I hope this tv doesn`t turn into a difficult project! Rob

Reply to
Rob

The Hitachi part number is CP08451U, btw. I just read your replay and I am at the shop where I could check it. The latest version that I have received from Hitachi is the MCZ3001DB and they have worked fine in the Sony sets.

Le>> Most likely one of the regulator ICs. You need to start by changing the

Reply to
Leonard Caillouet

Usually just IC8002. B & D Enterprises has them for 9.00 each.

800-458-6053

Get the DB version, it's improved.

Mark Z.

Reply to
Mark D. Zacharias

Thanks for the info Mark! Rob

Reply to
Rob

Thanks Leonard, the IC`s did the trick! I am glad it fixed it, it would not be fun to troubleshoot a tv that big. Rob

Reply to
Rob

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