Dell Laptop AC Adapter Repair

[Seventh Prince]

Hi,

Have one Dell Laptop AC Adapter that is emitting hissing sound. A
physical checkout does not reveal any burnt parts.

ModelA-1900-05D PA-9 Family
Manufacturer: LiteOn
Input: 100-240V 50-60Hz 1.5A
Output: 20VDC 4.5A
Marking "CN-06G356-71615-432-061F Rev L04"

Any schematics that are available?

All advise is welcome. Thanks
七少爷SeventhPrince

 

[Pooh Bear]

Hi,

Have one Dell Laptop AC Adapter that is emitting hissing sound. A
physical checkout does not reveal any burnt parts.

ModelA-1900-05D PA-9 Family
Manufacturer: LiteOn
Input: 100-240V 50-60Hz 1.5A
Output: 20VDC 4.5A
Marking "CN-06G356-71615-432-061F Rev L04"

Any schematics that are available?

It's not entirely unusual for switch mode supplies to 'hiss'.

There's likely nothing wrong with it at all. The noise is likely due
to poor varnishing of a transformer btw but it doesn't affect
operation.

Graham

 

[Joerg]

Hello Graham,

It's not entirely unusual for switch mode supplies to 'hiss'.

The supply of our new Dell printer hissed since the first day. The
problem is that the hissing continues all the way up to tens of MHz :-(

Of course, out here one has to check for other sources when hearing a
hiss: Rattle snakes. Then there is the occasional pet that gets out,
like a 15ft python here in Sacramento which is appropriately named "Miss
Hiss". She ventured out into a warehouse next door twice. Since she
wasn't volunteering to slither back home it took five guys to carry her.

Regards, Joerg

 

[Graham]

[relpy to sci.electronics.repair only]


Have one Dell Laptop AC Adapter that is emitting hissing sound. A
physical checkout does not reveal any burnt parts.

ModelA-1900-05D PA-9 Family
Manufacturer: LiteOn
Input: 100-240V 50-60Hz 1.5A
Output: 20VDC 4.5A
Marking "CN-06G356-71615-432-061F Rev L04"


You don't mention whether the PSU is otherwise serviceable.

--
Graham.



%Profound_observation%

 

[Seventh Prince]

nothing is written on the casing on serviceable. but it is expensive
RM160 (US$43)

七少爷SeventhPrince

 

[James Sweet]

nothing is written on the casing on serviceable. but it is expensive
RM160 (US$43)

???SeventhPrince

He meant does it work aside from making the noise or is it dead?

 

[jakdedert]

He meant does it work aside from making the noise or is it dead?

Ebay....

jak

 

[Bob Horvath]

On 26 Sep 2005 02:11:19 -0700, Bob Horvath wrote:

Are you aware that Dell had a recall on certain AC adapters. My
daughter got a free replacement from them.
Bob

 

[Dave Baker]

On 26 Sep 2005 02:11:19 -0700, Bob Horvath wrote:

Are you aware that Dell had a recall on certain AC adapters. My
daughter got a free replacement from them.
Bob

I got 2 replacements. I think they were both the 70 watt adaptors though.
Both were replaced with 90 watt adaptors.

Personally I wouldn't recommend trying to fix it (& I've been in electronics
for 25+ years). They can be bought cheaply around Asia if necessary - I
forgot to bring my adaptor with my notebook to Singapore recently, so picked
up another adaptor in Sim Lim Square for under US$60 I think.

Dave

 

[Robert Baer]

I got 2 replacements. I think they were both the 70 watt adaptors though.
Both were replaced with 90 watt adaptors.

Personally I wouldn't recommend trying to fix it (& I've been in electronics
for 25+ years). They can be bought cheaply around Asia if necessary - I
forgot to bring my adaptor with my notebook to Singapore recently, so picked
up another adaptor in Sim Lim Square for under US$60 I think.

Dave

Methinks you got ripped off; most adaptors go for far less; check out
Jameco (most of them are less than $30).

 

[Pooh Bear]

Methinks you got ripped off; most adaptors go for far less; check out
Jameco (most of them are less than $30).

Blimey ! Yes.

We can get simple oem 'wall warts' for as little as $2.50. OK it's not a switcher
and not say 30W but I'll guess they don't cost any more than say $6 to make.

Btw - the cable modem that came from my cable company was proudly emplazoned with
the brand name *OEM* !

I guess they read the parts list, saw OEM power adaptor and assumed they had to
'brand' it as such ? I ought to post a pic in abse

Graham

 

[Dave Baker]

Blimey ! Yes.

We can get simple oem 'wall warts' for as little as $2.50. OK it's not a switcher
and not say 30W but I'll guess they don't cost any more than say $6 to make.

These are 90 watts, and run on everything from 100V to 250V on even rubbish
ship generator power. And are in a pretty small form-factor.

Dave

 

[Kancil Killer]

call tghe toll free tech support. report the problem.


--

http://www.kancilkiller.net
http://www.kancilkiller.net/photoblog/
Hi,

Have one Dell Laptop AC Adapter that is emitting hissing sound. A
physical checkout does not reveal any burnt parts.

ModelA-1900-05D PA-9 Family
Manufacturer: LiteOn
Input: 100-240V 50-60Hz 1.5A
Output: 20VDC 4.5A
Marking "CN-06G356-71615-432-061F Rev L04"

Any schematics that are available?

All advise is welcome. Thanks
???SeventhPrince

 

[Pooh Bear]

Hi,

Have one Dell Laptop AC Adapter that is emitting hissing sound. A
physical checkout does not reveal any burnt parts.

Several ppl have reported various Dell wall-warts and lump-in-a-cords
that 'hiss'.

The noise can be caused by poorly assembled magnetics. It's not a
'fault' as such and Dell won't replace it.

Graham

 

[mike]

Seventh Prince wrote:




Several ppl have reported various Dell wall-warts and lump-in-a-cords
that 'hiss'.

The noise can be caused by poorly assembled magnetics. It's not a
'fault' as such and Dell won't replace it.

Graham

Dell recalled a bunch of wall warts.
Don't know the wart number, but it fit my CPiA-400.
mike

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Bunch of stuff For Sale and Wanted at the link below.
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[Pooh Bear]

Dell recalled a bunch of wall warts.
Don't know the wart number, but it fit my CPiA-400.
mike

Interesting.

You got a replacement just because it hissed ? If so, Dell have changed
their policy.


Graham

 

[mike]

mike wrote:




Interesting.

You got a replacement just because it hissed ? If so, Dell have changed
their policy.


Graham

You're inferring.
What I said was that they recalled some wall warts. I never mentioned
hissing. Mine had no symptoms at all.
mike

--
Wanted, Serial cable for Dell Axim X5 PDA.
Return address is VALID but some sites block emails
with links. Delete this sig when replying.
FS 500MHz Tek DSOscilloscope TDS540 Make Offer
Bunch of stuff For Sale and Wanted at the link below.
MAKE THE OBVIOUS CHANGES TO THE LINK
ht<removethis>tp://www.geocities.com/SiliconValley/Monitor/4710/