These plasmas run a little warm. That's been established. But when I was still able to notice that 'new electronics' smell near the set after four months of ownership, I decided that it was a bit much. I'm familiar enough with electronics to be quite certain that this is par for the course (not a faulty set). But with anything electronic, heat kills... eventually.
Now that I'm 50 years old, I'm less eaten up about a few extra db's of background noise to accompany my tinnitus, so the following trade-off is well worth it.
The upper corners of this set are quite warm and if you put your face directly into the upper ventilation after it has been running for a couple of hours you will be able to enjoy that 'new electronics' smell... which is your large investment shedding it's vital pcbs and other vital bodily fluids into the ether, never to be regained. Heat is the culprit. It really doesn't have to be this way and, in fact, the ventilation perforations in the sheet metal behind this set are actually pretty restrictive.
So a little proof of concept was in order. Scavenged a couple of 3.5 inch muffin fans from an old computer tower. First thing I noticed was that the majority of noise generated by these highly engineered case fans is the result of turbulence. Forget sleeve vs ball bearings, etc. It's turbulence.
Experimenting with a few arrangements, top mounted drawing, bottom mounted pushing, I settled on pushing... quietest at a given rpm according to my ear.
In addition, the fan needs some separation from the perforated face to lessen turbulence (noise created by those perforations). That's ok. At the low CFM that I'm shooting for, I'm happy just creating a high pressure zone in front of those inlets.
The offsets are soccer shoe cleats from my kids shoes. They thread into the fan housings just perfectly. Then they're applied to the back of the set with dots of two sided foam tape (one of my favorites). The tape serves double duty isolating vibration (noise) from the panel.
They're 12vdc fans (common in computer use). I wanted to be able to play with the speed/cfm/noise so I used an off the shelf standard 120vac dimmer before the 12vdc transformer. You need to use an old fashioned stacked plate (heavy) wall transformer since newer smps (switched mode power supplies) don't like to play with dimmers.
This is proof-of-concept so I adjusted the fan speed to the point where I could no longer hear the pair from across the room (against the ambience of outside traffic, dehumidifier in the basement, refrigerator, tinnitus, neighbor's kids, my kids, wife wondering out loud what the #uck I'm doing to the new television set, and etc.) Just guessin it's about six or seven volts paralleled to the fans.
The result is just about right. After three hours of operation, the top of the set is as cool as 'off', there is absolutely no 'new electronics' smell (the smell of death), and the added dbs are negligible.
Now that I'm happy with it I'll order a couple of these, much better quality, Nidec 3.5 inch fans from SurplusCenter.comhttps://www.surpluscenter.com/item.a...tname=electric