My 5 year old KV-36HS510 has what appears to be an ongoing Sony traditional failure: the recurring 6 Blinks, No Picture, No Sound failure. In searching the forum I have noted a few different fixes and I'd like to pursue a few. While I'm waiting for the service manual I thought I'd post this question.
On an old thread in the forum I noticed reference to a 5 volt failure on the A, B & M boards and the suggestion that it could be IC504.I see no IC504 on any of these boards. I found an IC2504 on the M board in a section marked as +5V regulator. And the device appears to be a 3-pin voltage regulator. Is this what I should replace? If so, where can I get one.
[ This message was edited by: pascione on 2008-08-22 13:08 ]
Joined: Aug 21, 2008
From: Cornwall, UK.
Posted: 2008-08-22 16:07
Im not conversant with that model of TV, but you can certainly test the +5v regulator quite easily with a cheap multi-meter. Ground one lead of the meter, then probe the regulator pins with the other lead.
If its a standard 5v regulator (7805) then the right pin should give you +5v, the centre pin is ground and the left pin anywhere from 8-35v
BE VERY CAREFULL! There are dangerous voltages inside a TV even when its unplugged.
Today I checked the 5 volt regulator. Nothing. So without a set of schematics, what is that telling me? The input side should have an unregulated voltage or is the failure mode a dead short. Any clues out there?
Oh, and somewhere along the way, 6 blinks became a consistant 7 blinks. Now I'm going to go back to the forum and see if I was heading in the wrong direction.
[ This message was edited by: pascione on 2008-08-24 19:09 ]
[ This message was edited by: pascione on 2008-08-24 20:31 ]
This is the first time I am on this forum. I have done a search but have not come up with a solution. Perhaps what you are experiencing may help us. Here is my situation - may be similar enough to yours to get some ideas on what to do : Thanks for reading it-
We have a KV-36XBR800. We had a power fluctuation and outage. A few hours after this power outage, we turned the tv on and it did not have a picture, but we hit power a couple of times and it suddenly started working and did fine the rest of the evening.
The next day (today) we turn power button, TV does not come on but we got 6 flashes. Push power button again and it still does not come on but we get 7 flashes. Have tried unplugging from wall, waiting several minutes, then plugging back in: it tries to come on like it was never turned off and we get 6 or 7 blinks....tried the remote reset button/power button. Nothing is doing anything.
We live in a rural area with no chance for a repairman. My husband is an electrical engineer but not a TV repairman. Please let us know if there is anything you can think of that we can try. This TV is a bigggg part of our daily lives.
I believe we might be in the same shoes. Mine failed a couple of days after a severe lightning storm. We had a few power surges that may have damaged the TV only to completely fail a few days later. I followed the advice of "skytrooper" at: http://www.agoraquest.com/viewtopic.php?topic=32067&forum=34&PHPSESSID=cef74b7e082ab52cf6b99bfceb292b3b I purchased 2 ICs on the D-board (MCZ3001) per his and others advice in this forum. I haven't received the parts yet but last night I put in two 18-pin sockets also per skytroopers suggestion. In searching the forum it appears this issue is a recurring problem for many Sony TVs. If this fix works the sockets will make a second repair a piece of cake.
I will post my results when I receive the parts. Also if your husband is an EE (small world, so am I) I have a suggestion: Join the forum and request a copy of the shop manual. A full set of schematics is provided. Taking advice is helpful, the schematics makes sense of the advice.
We left the TV unplugged for close to 36 hours (per some other forum). Went through the usual process of buttons pushed with no response other than the darn 6/7 blinks. Suddenly, the frustrated husband jumped up and down, whirled around, shouted obscenities and rapidily unplugged and replugged the plug in the power strip half a dozen times.... the TV started. It is working just like normal. Go figure.
Well, I have zero confidence that if we turn it off it will start up again. I do think we have an issue with the "D board". But since it is working I think the board is OK but the connection is inconsistent. I have ordered the service manual but have a favor to ask right now - can you possibly tell me where this D card is on the set? Or simply how to recognize it? Husband thinks maybe if we clean it up (with air) we can alleviate the connectivity problem. We had this same problem with the wireless card on our laptop computer.
Getting replacement parts is quite difficult for us. We are retired and living in rural Mexico in a VERY VERY DUSTY DUSTY WINDBLOWN place. We just had our first rain in almost a year (TS Julio) which was where the power surge came from. We actually have a fancy voltage regulator for the TV just for this reason but it didn't work. That was a huge disappointment. Maybe our TV is extremely sensitive. Luckily our computer is OK since it is our only link to the 'real world'.
We wish you much luck with your fix once you get those parts. I think I will leave our TV 'on' forever.....
Each board has a very large bold letter, you can't miss it. On my set the D board is the bottom left (looking at the tube from the back). If you look closely there are actually 2 boards connected together directly under the tube. The D board is the left and the A board is the right. Getting parts shouldn't be an issue no matter where you are. Internet purchases have no borders. I still haven't recieved my parts yet. I didn't pay the extra for overnight shipping. I don't expect them till next week.
We did get the manual downloaded last night and with that and your description we understand the D very well. Thanks for recommending getting the manual because it gave the husband more good info (like the whole chassis being live, etc.). And I was surprised that we could simply get it downloaded for 20 bucks (from Uruguay!).
Not much we can do where we are other than pull the back off and clean the 6 years of dust and dirt. Possibly reseat the contacts on the boards. And go again!
The set worked last night. This morning it fired right up (well it did hem and haw a bit)....we have our fingers crossed for this evening. Hopefully a good cleaning will get us a few more years out of the TV. It is true that the internet has no borders, but we have no mail or delivery services within 100+ miles. At this moment the roads to that town are all washed out, too. Thats always the hitch down here (in paradise).
We will check back to see how your fix comes out once you get those parts. Thank you very much for your communications and advice.
For all those waiting patiently for my status hang tight. My parts are on back order. If this solves my problem I plan to go back and place a second order so I have them around in anticipation of the reoccurrence of this failure. Pat
[ This message was edited by: pascione on 2008-09-09 20:08 ]
Is there a difference MCZ3001 and MCZ3001D? Or is there a "newer" DB model of this IC. I have the KV-36HS510 with no pic or sound and 6 blinks. What does IC stand for; integrated circuit? My head is spinning..
I keep reading about soldering. does the mcz3001require it?
[ This message was edited by: Dutch123 on 2010-01-06 17:36 ]
[ This message was edited by: Dutch123 on 2010-01-06 17:45 ]
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