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Panasonic ZT60 and VT60 Fan/Fridge Noise Production Numbers - Page 8

post #211 of 1365
Yes, experimentation confirmed. I pulled out a long extension cord and plugged the TV into a different circuit. I have been running the TV for a while now, and the audio equipment is happy and not buzzing. The TV still buzzes itself, but much quieter. As mentioned above, this could be a ground loop problem. But only the TV appears to cause it. Could it potentially be the power supply in the TV is flakey or maybe drawing too much current? The outlet that I am using is dedicated to audio/video and is itself properly grounded. In the mean time, I will read up on ground loops and see if anything can be done. It isn't really practical to plug the TV into a different circuit so I would like to find a solution where it can be plugged in with everything else.
post #212 of 1365
Quote:
Originally Posted by Tallis77 View Post

Yes, experimentation confirmed. I pulled out a long extension cord and plugged the TV into a different circuit. I have been running the TV for a while now, and the audio equipment is happy and not buzzing. The TV still buzzes itself, but much quieter. As mentioned above, this could be a ground loop problem. But only the TV appears to cause it. Could it potentially be the power supply in the TV is flakey or maybe drawing too much current? The outlet that I am using is dedicated to audio/video and is itself properly grounded. In the mean time, I will read up on ground loops and see if anything can be done. It isn't really practical to plug the TV into a different circuit so I would like to find a solution where it can be plugged in with everything else.

Well, I discovered that when I have the TV plugged in to the other circuit and the audio system is muted, all is well. Unmuting the audio system causes a heavy hum through the speakers. That is definitely a ground loop. I returned the TV to the same circuit as the audio equipment, and there is no hum, but the buzz returns in the amplifiers (there is no sound through the speakers). This makes me think once again that the TV power supply is the culprit. When they are plugged in together, everything is sharing a ground so I don't think it is a ground loop.
post #213 of 1365
I noticed a buzz the first time when my tv (65zt60) was plugged into a UPS and one particular mostly white screen was displayed while on pause. After putting ear to the tv, the buzz wasn't actually coming from the tv but rather from one of the UPSes beneath it. I plugged the tv into the other UPS and sure enough that one buzzed instead.

I've never had any problems like that in the past, so the tv was the obvious culprit. Anyway, it now is plugged directly into the wall and no more buzz. It shares the outlet with the subwoofer, which does not buzz either. Nor does any of the rest of my AV equipment (which is all essentially on the same circuit).

Only time my tv has buzzed since was when I played the slides for an hour or two. Normally I'm more or less just using THX Theater mode 100% of the time, 50% contrast (should be into the set's second 100 hours by now).

Would really like to get the tv back on a UPS though. (The subwoofer as well, just haven't got around to it, and am a bit leery of doing so since I've had its power supply repaired twice (in ten years) when it was using a UPS (perhaps coincidence, perhaps not, but just not sure I want to risk it again...))

Anyway, perhaps play around with contrast (or brightness) level and see if that makes your buzz more tolerable, in particular from you usual listening position.
post #214 of 1365
unfortunately, that type of buzzing problem is not the typical plasma buzz that most people get.

the buzz comes from the TV itself on bright white sceens.
post #215 of 1365
Right, which is what I was referring to via "Only time my tv has buzzed since was when I played the slides for an hour or two." That is only time i get the tv buzz. Or should I say I can hear it. During normal play per THX Cinema settings, I don't hear tv buzz at all.

Fans on the other hand...
post #216 of 1365
I hear the plasma buzz mostly when I am trick playing through a recording. So it seems to be louder during a drastic dark to light scene transition(basically what running slides does).
post #217 of 1365
I've had my 65VT60 for about 2 months now. The fan noise has been obvious, but not overly annoying. Basically, a low humming\whirly noise heard during during no\low volume. I decided to follow the pictures in post #158. I picked up some 1/2" X 1/2" foam tape from the hardware store and placed it in the same spot as shown in goosedizzle's pictures. On the 65VT60, there isn't a fan in the middle. I went ahead and turned the brackets around. The whole thing took about an hour. There are a lot of screws. Tip - they are all the same except for the 2 that have the washers on them. You have to remove a few brackets\covers\wifi adapter and the mounting hole covers, but it is pretty straight forward. I would also recommend putting 4 corner screws in first when you put the cover back on. The cover can move slightly and putting a screw in each corner will help keep the holes lined up.

So far so good, no noise. But, now I hear the basic plasma buzz. The house is completely quiet and I only hear it on bright scenes. I don't think I've ever noticed it before.
post #218 of 1365
60VT60, April build, bought early July, 2 weeks ago had foam fix done, Panasonic Field Representative did fix he was very informative reported problem to be as reported by OP on the update. He admitted this would not silence fans but would improve it to where I would not hear "noise" in viewing area. He also reported foam is being added at factory now. My 60" is definitely quieter now he did 3-1 strip fix, I contacted him a week later to inform him "hum" can still be heard if room is very quiet and TV is muted but I cannot hear "hum" during quiet scenes now, he told me to let him know if I was not satisfied with fix. If your TV did not get quieter I would definitely keep contacting Panasonic they were very helpful with me, (Rep.drove 30 miles to install fix, he said Panasonic sent him as they are collecting data and have not been happy with reports filed by contracted service people), I thought about returning TV but now definitely keeping set.
post #219 of 1365
Well, I haven't found any DIY solution to my buzzing problem yet. I have tried plugging the TV directly into the wall, using a power strip to try to isolate it, and even pulling the UPS that I use with my computer and plugging it in to that. Both the subwoofer amp and my regular amp continue to buzz in concert with the TV. The sound pulses -- quiet sometimes and then rising up for a couple of seconds, and then diminishing again. I still await a call back from the service company to see if this is a defective power supply in the TV. If it isn't that, I don't have a solution. One possibility might be some other kind of power reconditioner but I am already using one for the audio system and it doesn't seem to help. Any other suggestions?
post #220 of 1365
Once upon a time I had a separate pre-pro and power amp that I was trying out. Could not get rid of the hum (I think possibly one or the other was causing it, either one possibly damaged in transit - by the time I gave up on it and returned it, the pre-pro wasn't working all too well (maybe not at all, don't recall)'; the amp had a switch on it to reduce the hum but it was still too audible for me.

What I do recall was removing other things from various outlets in the house (florescent light in the basement, mechanical timer(s), unplugging the fridge for a bit) to see if one of them might make a difference. Just a thought of something else to try. Maybe remove the power conditioner from your system. (I remember at one point getting a power conditioner to see if that would get rid of the hum, but it didn't.)

One other thing might be to reduce the contrast level on your set, maybe it's just too high for your particular a/v environment. (Or maybe you're pushing the limits of your electrical wiring. Maybe check your outlets to see if the wires are tight, or get one of those plug-in polarity testers and make sure they're wired properly.) [Just guessing.]
post #221 of 1365
4 days after adding foam and flipping the fan brackets and I've had zero fan noise and under normal viewing, I don't notice any plasma buzz. The back of the tv is pretty warm, but I didn't feel how warm is was before making the changes.
post #222 of 1365
Quote:
Originally Posted by Silly Rabbit View Post

4 days after adding foam and flipping the fan brackets and I've had zero fan noise and under normal viewing, I don't notice any plasma buzz. The back of the tv is pretty warm, but I didn't feel how warm is was before making the changes.

It gets pretty warm on the right side (viewing from front) without the foam fix. good to read it has resolved the issue smile.gif
post #223 of 1365
I just got a price quote from Clevelan Plasma. He said they have sold 400 units and only 3 complain of the fan noise. Sort of hard to believe but he is a trustworthy seller. I would hate for the thing to arrive and have the damn noise.
Panassonic dropped the ball big time on this
post #224 of 1365
Thread Starter 
Quote:
Originally Posted by Bardia View Post

I just got a price quote from Clevelan Plasma. He said they have sold 400 units and only 3 complain of the fan noise. Sort of hard to believe but he is a trustworthy seller. I would hate for the thing to arrive and have the damn noise.
Panassonic dropped the ball big time on this

Just remember not everyone hears the noise. It heavily depends on your environment. The picture quality will make up for the noise big time.
post #225 of 1365
Unfortuantely my ears are exremely sensitive and I know I will be bumped out.
And then there is the issue of sound. My wife can't turn the whole system on and she listens to iCloud thru apple tv. I need decent TV sound which my Kuro delivers. VT60 has better speakers but not the same panel.

Arghh..
post #226 of 1365
Thread Starter 
Quote:
Originally Posted by Bardia View Post

Unfortuantely my ears are exremely sensitive and I know I will be bumped out.
And then there is the issue of sound. My wife can't turn the whole system on and she listens to iCloud thru apple tv. I need decent TV sound which my Kuro delivers. VT60 has better speakers but not the same panel.

Arghh..

The Panasonic fix should help with the noise. And, nobody is more sensitive than I am. I exchanged my TV 4 times, and that should say something.

The wife issue is easily fixed by purchasing a harmony smart control and putting the app in her iPhone/iPod/iPad.

ZT is a fantastic TV for anyone who loves movies and film like material; seriously, it is the best current choice. For TV, go with F8500. Good luck.
post #227 of 1365
Quote:
Originally Posted by Lost! View Post

The Panasonic fix should help with the noise. And, nobody is more sensitive than I am. I exchanged my TV 4 times, and that should say something.

The wife issue is easily fixed by purchasing a harmony smart control and putting the app in her iPhone/iPod/iPad.

ZT is a fantastic TV for anyone who loves movies and film like material; seriously, it is the best current choice. For TV, go with F8500. Good luck.
F8500??

Is that a Typo? I like the ZT, And I have harmony one, but I am using analog for sound and HDMI only for Video. Beleive me, my set up is complicated but it looks and sounds fantastic.

I will go check out the ZT tomorrow.
post #228 of 1365
Thread Starter 
Quote:
Originally Posted by Bardia View Post

F8500??

Is that a Typo? I like the ZT, And I have harmony one, but I am using analog for sound and HDMI only for Video. Beleive me, my set up is complicated but it looks and sounds fantastic.

I will go check out the ZT tomorrow.

No, it wasn't a typo smile.gif For TV, I think F8500 is sharper. However, I always liked the dimmer look of Panasonic more, especially for movies.

I don't know about Harmony One, but I did setup everything in my smart control. It changes the inputs, and Apple TV works fine too. Wife is not happy about technology, but at least I can show her that it works smile.gif

Have fun with the ZT tomorrow.
Edited by Lost! - 9/7/13 at 4:12pm
post #229 of 1365
F8500 isn't a bad TV but it's not in par with the ZT. It also suffers from speakers pointing towards the back. Only the VT60 has forward speakers and in a dark room, it's exactly like ZT.
I do however have a bright room in the day time which means the F8500 is a better choice..decisions decisions...
post #230 of 1365
I brought that 65ZZT60 home today and it is May 2013 production and it already has the Foam Fix. Pretty Quiet. Picture is simply Perfect.
post #231 of 1365
Thread Starter 
Quote:
Originally Posted by Bardia View Post

I brought that 65ZZT60 home today and it is May 2013 production and it already has the Foam Fix. Pretty Quiet. Picture is simply Perfect.

Usually May pr# shouldn't have the foam fix. How do you know it has the fix? It is very hard to see them. Just remember, they are installed below the fans out of sight, not around them. The ones that are around the fans are already there and not part of the fix.
post #232 of 1365
I just checked, my May production has foams on all 4 sides of the 3 fans. Should I still call for a fix?


I'm thinking they have send technicians to the stores and install these on the unsold sets...
Edited by Bardia - 9/8/13 at 8:30pm
post #233 of 1365
Thread Starter 
Quote:
Originally Posted by Bardia View Post

I just checked, my May production has foams on all 4 sides of the 3 fans. Should I still call for a fix?


I'm thinking they have send technicians to the stores and install these on the unsold sets...

Agha Bardia,

Those foams are not the foam fix. Go look at post #158 in this thread. The Foam Fix is installed below the fans not around them.

wink.gif
post #234 of 1365
Quote:
Originally Posted by Lost! View Post

Agha Bardia,

Those foams are not the foam fix. Go look at post #158 in this thread. The Foam Fix is installed below the fans not around them.

wink.gif

Well that's good news because it's pretty quite now. Do I need to call Panasonic for the fix?
post #235 of 1365
If it doesn't bother you, no.

I have a May-manufactured set with airflow noise...and I may not bother with "encouraging" Panasonic to give me a fix (the latter effort has the potential to be more stressful than the noise itself).
post #236 of 1365
Is the white screen buzz normal and on all of them?
post #237 of 1365
Gents I have the 65" vt50 and I had the pulsing loop going through my amps too. I have a XPA-5 for the speakers and a SA-1000 for the subs and I had to separate the power as well. Weirdest thing about it is that even if you put a cheater plug on the tv or the subs or all at once, the sound persisted. I hate the idea that my expensive ass plasma is not on the good power protector but at least that God damn noise is gone... Panasonic, what a joke.
post #238 of 1365
Quote:
Originally Posted by copene View Post

Gents I have the 65" vt50 and I had the pulsing loop going through my amps too. I have a XPA-5 for the speakers and a SA-1000 for the subs and I had to separate the power as well. Weirdest thing about it is that even if you put a cheater plug on the tv or the subs or all at once, the sound persisted. I hate the idea that my expensive ass plasma is not on the good power protector but at least that God damn noise is gone... Panasonic, what a joke.

Make sure you get a good Panamax Power Conditioner..
post #239 of 1365
As I noted above, I have a panamax power conditioner in my system and it doesn't make a difference. I still have the buzz in my amps as long as the TV is plugged in to the same circuit. I can't plug my TV into another circuit because there is no plug nearby and when I have experimented with it, I get a ground loop problem even if I do plug the TV into another circuit. I am still waiting for the next service call to see if this is a standard problem with the TV and see if there is anything that can be done about it. My last communication with the service provider was last Friday. I hope to hear from them this week.

If they say that this is normal, I am wondering whether getting an electrician to look at it would be fruitful. I am positive that everything is grounded correctly. But maybe an electrician could make a suggestion.
post #240 of 1365
Quote:
Originally Posted by Tallis77 View Post

As I noted above, I have a panamax power conditioner in my system and it doesn't make a difference. I still have the buzz in my amps as long as the TV is plugged in to the same circuit. I can't plug my TV into another circuit because there is no plug nearby and when I have experimented with it, I get a ground loop problem even if I do plug the TV into another circuit. I am still waiting for the next service call to see if this is a standard problem with the TV and see if there is anything that can be done about it. My last communication with the service provider was last Friday. I hope to hear from them this week.

If they say that this is normal, I am wondering whether getting an electrician to look at it would be fruitful. I am positive that everything is grounded correctly. But maybe an electrician could make a suggestion.

I had my Electrician run a seperate line strictly for my home theater set up from outside the house. I have the Panamax 5510, for 10 years now and it's been great.
I do get a loud buzz when the screen goes white but nothing from the speakers..
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