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< Esato Forum Index > Sony Ericsson / Sony > Software, Firmware and Drivers > K750 > R1AA008 > Hissing sound when making phone calls Bookmark topic

I have noticed this "hissing' or what ever from the first day I have upgraded to RAA. My observations are following: it seems that when other party stops talking, earphone is switching off, when other party starts to talk, it's switching on again, but then you hear only end of first word; if other party is silent and there is any sound in the background of others party (TV, street noise etc) the the hissing starts which is because earphone is switching on and off. And only if you increase the sound level close to maximum, "hissing" disapears, as it seems earphone is not switching off anymore.

I have also noticed, that the severity of this problem depends on the phone model of other parties, with some people I hardly have hissing at all even at low volumes, while with others even at high volume the others parties voice is cutting off.

Anybody can confirm this?
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Posted: 2006-01-11 08:19:09
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@doit

That is exactly the problem!

@matik

I and a few friends have recieved simillar notes from SE. I have also spoken to a technician, and I'm beginning to think that it isn't a firmware problem. Instead much tend to point to a hardware problem. It seems many phones have these strange sounds after the update to R1AA008 but I think it's there also in R1N035 but people don't hear it as much since the volume is lower in that firmware.

I think almost all K750/W800 had a hardware fault until end of last year. SE decided to change a component in those models not so long ago, and they had to admit it since the SAR value went from 0,69 to 0,99. But they refuse to talk about what was changed. My bet is that it has to do with this problem!

I don't think this problem will ever be resolved using firmware. A few of us will send their phones in for repair and SE will have them fixed by changing some hardware in them... some other people will live with it hoping for a firmware update to fix the problem and eventually they will buy a new phone and forget all about it... then there's a few others who don't know about the problem since they think it's a network problem... then there's a few who just don't care...

So, my bet is that this problem will never be fixed - SE even claims that there are no problems!

[ This Message was edited by: CyberVisitor on 2006-01-11 11:54 ]
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Posted: 2006-01-11 11:26:47
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cybervisitor

Most probably you are right, fundamental problem lies within hardware, but I think, that new FW have done this problem more visible. And this is because they increased the earspeakers volume beyond it's limits (listen to earspeaker test). Somebody here said before, that they downgraded to R1N and hissing gone. So, there is hope, that they will fix it someday.
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Posted: 2006-01-11 12:28:40
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I add my self to the list of individuals with a hizzing SE K750

_________________
Life without knowledge is death in disguise


[ This Message was edited by: defiant1 on 2006-01-12 13:39 ]
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Posted: 2006-01-12 13:58:13
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I have here a sim free k750i with R1AA008 and i'm not getting any problems at all with it. No hissing,resetting ect......

Its a week 47 model, maybe some hw difference to others???


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Posted: 2006-01-12 14:02:10
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Quote:
On 2006-01-12 14:02:10, TheWhizz_68 wrote:
I have here a sim free k750i with R1AA008 and i'm not getting any problems at all with it. No hissing,resetting ect......

Its a week 47 model, maybe some hw difference to others???



Do mind checking your box and see what SAR value is in the little note. Is it 0,69 or 0,99? All my K750 are week 42 and earlier with 0,69 and they have the hissing sound.

Great if you could check!
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Posted: 2006-01-12 18:22:23
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The highest SAR value for this model tested by Sony Ericsson for use at the ear is 0.66 w/kg 910g).

Is this what you wanted mate?

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Posted: 2006-01-12 18:51:13
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Quote:
On 2006-01-12 18:51:13, TheWhizz_68 wrote:
The highest SAR value for this model tested by Sony Ericsson for use at the ear is 0.66 w/kg 910g).

Is this what you wanted mate?




Strange, you have a phone manufacured AFTER they updated the SAR value to 0,99 (see their web site) yet the manual in your box says 0,66 which is the old value... hmm!

I was thinking that the component that they have changed in the phone (which made the SAR value go to 0,99) had something to do with the fact that you don't have the hissing sound. I was wrong.

So the hissing seems to be random (unless your phone has a SAR value of 0,99 but they put an old manual in your box).

Damn, I love this phone but it's useless talking on it - it's a real shame!
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Posted: 2006-01-12 20:27:35
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I have bugging iss of "incorrect parameter"
while xfering data from phone to PC...
and then after that I cant view my removable drive...
I xfer a lot of data so its really bugging....

Small files are fime but a big file of around 10Mb+ gives this iss...
I split the file and get it xfered...to get around it
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Posted: 2006-01-13 08:52:05
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Hi,

I have had my K750i (R1L002 FW on O2 UK) since September last year and apart from the usual dust under the screen and sticky joystick it has be perfect, that is until last week when I noticed the ear speaker was crackling badly. It's like this no matter what the volume is set to and appears to be worse when it's me who's talking. Like a crackling / vibrating noise.... reminds me of when I used to blow cheap and nasty headphones. It's very annoying and I've been sending a lot more texts as a result.

I also tested the earphone in the service menu and it just sounds horrible, again with any volume. I think I'm going to see about returning it although I'm sure it wont be covered under warranty now as I've replaced the housing. I cant imagine it will cost much to fix and I'd even do it myself if I can find a replacement speaker for it.

Anyway, the fact that the problem has just appeared after months of it working as it should leads me to think it's more of a hardware problem than a firmware issue, for my phone at least. As I said before it sounds like a blown headphone and I cant see how that could happen out of the blue and be caused by firmware. The weird thing is, it's hardly like the max volume is so loud that it would blow a speaker!

Knew I should stuck with Nokia lol

Just my tuppence worth.

Lee

[ This Message was edited by: Lee750 on 2006-01-21 14:37 ]

[ This Message was edited by: Lee750 on 2006-01-21 14:43 ]
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Posted: 2006-01-21 15:33:24
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