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toucan murphy |
2010-04-20
, 14:00
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Posts: 67 |
Thanked: 26 times |
Joined on Jan 2010
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#11
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I find if i turn on the screen the noise stops until it goes blank again...
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2010-04-20
, 14:00
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Posts: 11,700 |
Thanked: 10,045 times |
Joined on Jun 2006
@ North Texas, USA
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#12
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It's not an unusual thing, and tends to be caused by coils (inductors), but if it's capacitor whine that could be an indicator that the capacitor is too small for the load on it.
__________________
Nokia Developer Champion
Different <> Wrong | Listen - Judgment = Progress | People + Trust = Success
My personal site: http://texrat.net
Nokia Developer Champion
Different <> Wrong | Listen - Judgment = Progress | People + Trust = Success
My personal site: http://texrat.net
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2010-04-20
, 14:16
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Posts: 145 |
Thanked: 237 times |
Joined on Mar 2010
@ Helsinki
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#13
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I have the same issue, and don't understand why it requires a DC to DC converter. Can someone explain?
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2010-04-20
, 14:20
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Posts: 60 |
Thanked: 9 times |
Joined on Apr 2010
@ Swindon, UK
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#14
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DC to DC?
The charger should be AC to DC shouldn't it?
Unless you mean the "block" thing? The old Nokia chargers use a DC jack, rather than the MicroUSB on the N900. It simply converts from one shape and size adapter to another.
The charger should be AC to DC shouldn't it?
Unless you mean the "block" thing? The old Nokia chargers use a DC jack, rather than the MicroUSB on the N900. It simply converts from one shape and size adapter to another.
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2010-04-20
, 14:25
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Posts: 145 |
Thanked: 237 times |
Joined on Mar 2010
@ Helsinki
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#15
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Originally Posted by christye
No it doesn't. It gets hot.
Unless you mean the "block" thing? The old Nokia chargers use a DC jack, rather than the MicroUSB on the N900. It simply converts from one shape and size adapter to another.
Edit: The chargers are 5 and 5,3 Volts
. USB standards strike again?
Last edited by jnwi; 2010-04-20 at 14:28.
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2010-04-20
, 14:36
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Posts: 418 |
Thanked: 90 times |
Joined on Nov 2009
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#16
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happens to me although when i heared the noise i unplugged it straight away.
sounds like its shorting out to me. dont use it is my advice.
sounds like its shorting out to me. dont use it is my advice.
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2010-04-20
, 14:38
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Posts: 1,341 |
Thanked: 708 times |
Joined on Feb 2010
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#17
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With my Nokia AC-5E (800 mA, came with N95-8GB) normal 2mm_to_microUSB adapter does not work. It has to be that CA-146C adapter, which does get hot and keeps the high pitching noise.
I haven't figured out why it absolutely needs that DC-DC converter with electronics and no simple 2mm_to_microUSB adapter work.
With Nokia AC-4E (890 mA) transformer, the simple 2mm_to_microUSB adapter works.
I haven't figured out why it absolutely needs that DC-DC converter with electronics and no simple 2mm_to_microUSB adapter work.
With Nokia AC-4E (890 mA) transformer, the simple 2mm_to_microUSB adapter works.
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2010-04-20
, 14:40
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Posts: 60 |
Thanked: 9 times |
Joined on Apr 2010
@ Swindon, UK
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#18
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Oh right. How strange. I assumed it would have been just a block which changes the bit you plug into your phone. I eBayed my phone, so didn't get any of the accessories with it =[ So I was only guessing =p
I love USB standards though, can charge my stuff whenever I'm near a USB port, which is the majority of the time. Although my N900 charger pumps out 1.2A, which is hugggeeeee
I love USB standards though, can charge my stuff whenever I'm near a USB port, which is the majority of the time. Although my N900 charger pumps out 1.2A, which is hugggeeeee
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2010-04-20
, 15:00
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Posts: 58 |
Thanked: 17 times |
Joined on Jan 2010
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#19
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I understand the workings of a charger.
I just found it odd that the little converter that you plug the normal charger into whines like it does. ( And as someone said, If you turn the screen on, it stops for a while )
The box is no bigger than a small pencil rubber ( half the size of a match box maybe )
(wall)-(old charger)---------------------cable-----------(small converter)------cable----(newtypeconnector)->N900
I just found it odd that the little converter that you plug the normal charger into whines like it does. ( And as someone said, If you turn the screen on, it stops for a while )
The box is no bigger than a small pencil rubber ( half the size of a match box maybe )
(wall)-(old charger)---------------------cable-----------(small converter)------cable----(newtypeconnector)->N900
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2010-04-21
, 15:38
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Posts: 182 |
Thanked: 40 times |
Joined on Apr 2010
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#20
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Drove me up the wall - I use it to charge my Droid as I needed the USB cable elsewhere. I've put it in a vented enclosure with no openings at the front or top.
