HI.
I am new on the forum.
I have a problem with the AR coating on my Beovision 5.The AR coating is removed on certain places.
Regardless of age the replacement screen it will be unacceptable.
I wonder if is posible  to remove AR coating in some way completely leaving the screen surface clean after the cleaning process.Does anyone have any experience with this.Or maybe does somebody have some bette solution.

Many thanks for answers and assistance.Tom.

I think the only way is to remove whats left of the coating i wonder if a paint thinners would remove it? Cheers Nick

Speak to your dealer would be my recommendation!

Only then would I consider things like thinners, glass polish or Automotive polish, jewellers rouge etc.

Be very careful, you could end up with marks on the actual glass!

Puncher:

Speak to your dealer would be my recommendation!

Be very careful, you could end up with marks on the actual glass!

... agree completely!

You'll also have to remove the speaker fabric, the aluminium frame, protect
the speakers & electronics from liquids and, and ...

Not an easy DIY job, IMHO - contact a qualified dealer/service first ...   

Vienna:

Puncher:

Speak to your dealer would be my recommendation!

Be very careful, you could end up with marks on the actual glass!

 

... agree completely!

You'll also have to remove the speaker fabric, the aluminium frame, protect
the speakers & electronics from liquids and, and ...

Not an easy DIY job, IMHO - contact a qualified dealer/service first ...   

To be honest i think i agree, your dealer will try to sell you a new glass. No point spoiling a great tv! 

 

Have the same problem with the AR coating of my BV5 but if I recall correct the price for a replacement glass will not be much less than a new second hand BV5 so that option is probably out of question... My dealer mentioned he had removed the AR coating with a glass cleaner a couple of times. Have not dared to try however. In my case the missing AR is only noticeable when the tv is off (and probably nothing anyone else should notice if not aware of it) so I can live with it.

AR is one thing I'm familiar with. Glass cleaner should NEVER be used with an AR surface, unless it is SPECIFICALLY formulated for use with AR (AR strips under both deviations from neutral with Ph).

 

That said, the companies B&O are having do their AR are under a price target.  Really good, long-lasting AR, with a hydrophobic and antistatic property for the surface area of a 42+ inch TV set is not gonna come cheap.  Maybe that's a contributor to the problems you're seeing.  I think it may be also why B&O made it optional on the smaller BV-10s.

 

FWIW

 

B

Emil:

... but if I recall correct the price for a replacement glass will not be much less than a new second hand BV5 ...

650 - 700 EUR (including VAT) for an AR coated frontglass BV4/5-42"  + labour costs 

Ok, AR = Anti-Reflective coating....?

I got a (2003) BV-5 and dont believe I got any problem with it - but then again I dont know what the symptoms of AR 'coming off' actually are....?

What are these symptoms you guys are talking about here?

Thanks,

 

You notice 'holes' in the balck on the front of the screen, even though the glass is fine.

It's happening in a couple of places on my BV7 Mark 3...... :-(

Bentleyman:

Ok, AR = Anti-Reflective coating....?

I got a (2003) BV-5 and dont believe I got any problem with it - but then again I dont know what the symptoms of AR 'coming off' actually are....?

What are these symptoms you guys are talking about here?

Thanks,

 

 

It will appear as if there as "smears" on the glass where the coating is missing, particularly visible when the TV is turned off. It comes about by over zealous cleaning using either materials or fluids unsuitable for the task.

It's very common on computer monitors (including CRT models) that have an AR coating, when people use screen cleaning fluids or solvents not designed for the task. LCD monitors are particularly problematic as the surface may not be glass and so can be more easily marked or damaged during cleaning.

Large48:

You notice 'holes' in the balck on the front of the screen, even though the glass is fine.

I see. Assume you mean when the TV is 'Off'.....?

Well, cannot see this issue on mine fortunately, but what are the possible causes of this?

Wiping / cleaning too much? Applying too much pressure when cleaning screen? Presumably this AR coating wouldn't just 'fall off' on it's own, would it?

Taking the question to an extreme, say u had a screen which had never been wiped or cleaned in any way.....would the coating therefore be unaffected? I.e. Is it best not to ever clean ur screen!!?

Puncher:

It will appear as if there as "smears" on the glass where the coating is missing, particularly visible when the TV is turned off. It comes about by over zealous cleaning using either materials or fluids unsuitable for the task.

It's very common on computer monitors (including CRT models) that have an AR coating, when people use screen cleaning fluids or solvents not designed for the task. LCD monitors are particularly problematic as the surface may not be glass and so can be more easily marked or damaged during cleaning.

 

Ahhh...thanks Puncher, you beat me to it - my previous post to this was asking the sort of thing you have just answered.

So this 'smearing' effect of which you speak is only really noticable when the TV is off? Is it ever noticable when the screen is in use..? That presumably would become much more of an issue.

I've not noticed any smearing on my screen to be honest, but I shall now have a closer look out of interest. Even if there are smears on my screen though, I'm not planning on sitting scrutinizing the TV too much while its 'off' in any case

Thanks for your help

Bentleyman:

Puncher:

It will appear as if there as "smears" on the glass where the coating is missing, particularly visible when the TV is turned off. It comes about by over zealous cleaning using either materials or fluids unsuitable for the task.

It's very common on computer monitors (including CRT models) that have an AR coating, when people use screen cleaning fluids or solvents not designed for the task. LCD monitors are particularly problematic as the surface may not be glass and so can be more easily marked or damaged during cleaning.

 

 

Ahhh...thanks Puncher, you beat me to it - my previous post to this was asking the sort of thing you have just answered.

So this 'smearing' effect of which you speak is only really noticable when the TV is off? Is it ever noticable when the screen is in use..? That presumably would become much more of an issue.

I've not noticed any smearing on my screen to be honest, but I shall now have a closer look out of interest. Even if there are smears on my screen though, I'm not planning on sitting scrutinizing the TV too much while its 'off' in any case

Thanks for your help

It's certaining easier to see when off, if you catch the light the right way, if you know what I mean. It will be noticeable when the TV is on, in that it will no longer be anti-reflective, compared to the surrounding area and so may be apparent during certain scenes and certain ambient light conditions.

My advice to you would be.............don't look!  If you've never noticed a problem carry on as normal. If you specifically look for it and find anything you'll notice it forever! (Just like the annoying DIY error/bodge that nobody ever notices but you know is there)!

Puncher:

My advice to you would be.............don't look!  If you've never noticed a problem carry on as normal. If you specifically look for it and find anything you'll notice it forever! (Just like the annoying DIY error/bodge that nobady ever noticed but you know is there)!

HaHaHa....that is spot on! I shouldn't look in the first place now I know what to look for!

I believe microfibre cloths are the best solution to cleaning screens without damage. Avoid paper towels as they are fibrous and can cause fine scratching.

bsantini:

AR is one thing I'm familiar with. Glass cleaner should NEVER be used with an AR surface,
unless it is SPECIFICALLY formulated for use with AR

Absolutely right!

You can easily damage an AR-Coating of screens, camera lenses, eyeglasses, ... 
either mechanically, by scratching (or even abrasion by the wrong cleaning tissue)
or chemically, by using an agressive fluid.  

E.g. in "User Guide BeoVision 7 - Getting Started" B&O recommends:

- Set up your television (EU page 23 / US page 21)
- Cleaning:

Maintenance:                 Regular maintenance, such as cleaning, is the responsibility of the user.

Screen:                          Use a mild window cleaning fluid and lightly clean the screen without
                                       leaving streaks or traces. Some micro-fibre cloths may harm the optical
                                       coating due to their strong abrasive effect .

Cabinet and controls :   Wipe dust off the surfaces using a dry, soft cloth. To remove stains or dirt,
                                      use a soft, damp cloth and a solution of water and mild detergent, such as
                                      washing-up liquid.

Never alcohol:               Never use alcohol or other solvents to clean any parts of the TV .

Might have expressed myself incorrect but what my dealer mentioned was that he had used a window cleaning fluid to remove the AR coating in cases there this had already been damaged, i.e. definitely nothing to use just in order to keep the screen clean. That being said, I own both a BV5 and a 7-32 and has noticed that a mild window cleaning fluid is ok with the 7-32 while the BV5 user guide state says that no liquid cleaners should be used. Just out of curiosity - what is the difference between the two coatings?

As regards the cost for a replacement front glass the price mentioned by Vienna was actually a bit lower than I remembered I was offered three years ago when I first time noticed this issue. 

Emil:

...mentioned by Vienna was actually a bit lower than I remembered I was offered three years ago ...

650 - 700 EUR (retail including VAT) is just for the sparepart (in Europe) - NO LABOUR included in that price... 

 

There is almost no way for one to know whether a "window" cleaning fluid is *mild*!

And there are different grades of microfiber quality and gentleness.

Best advice: buy a kit that specifically says it is good for ar coated flat panel screens (they're out there)and dont get too anal about cleaning

The less you touch, the better!

Barry

As a matter of course, I have looked into this a little bit....  It seems that the glass panel on the BV-5 is not available as a separate part.  No real surprise I suppose.  So, in real terms you would order part # 3451777 currently selling for approximately $2000USD and receive an entirely new Plasma monitor.  A bit stiff to be sure, but you're not just buying the glass.  Worth considering.  Naturally, you can always just peel the AR off.

Russ:

So, in real terms you would order part # 3451777 currently selling for approximately $2000USD and
receive an entirely new Plasma monitor.

I seriously doubt it'll be like that!

3451777 = Contrast Screen Plasma upd 2 (US Version)
3451454 = Frontglass Plasma / Contrast Screen BVi 4-42 & 5-42 (EU Version)

As far as I know, #3451777 is just the front glass (wo plasma panel) and it retails for
approx double the price, compared to the EU version.

approx EUR 1400 / USD 2000 will be the price for the 42" Contrast Screen - US Version
approx EUR   700 / USD 1000 will be the price for the 42" Contrast Screen - EU Version