X200s owners: could you check your AC adapter's FRU

Hi,

My x200s AC adapter gets very hot shortly after turning on the machine. I thought it an individual case, so ordered another one, but turned out this one is about the same. Both has FRU #42T5282, and there's no manufacture date on either of them (unlike other Thinkpad AC adapters). I've seen x200s with AC adapter that has different FRU and didn't become so hot even after long use, so I wonder if this particular AC adapter model is somehow inferior or defective. It will be helpful to know other people's experience. So if anyone with x200s could check the FRU of their AC adapters, and whether they get very hot very soon, I will be thankful! Thanks.
('cause I'm worried of the possibility of accidents...)

 

FRU: p/n 92p1157, warm but not hot at all.

 

Forgot the Manufacture date: 2009.02

 

FRU: P/N92P1157
Fabrication date: 2008.08 (yikes, that's an old one)

After the serial number it says "REV: I"

Rather warm but not hot (although that may be somewhat subjective). Not even when charging the 9-cell from scratch while using the computer for audio editing.

Edit: Mine is fed 220V at the moment. I gather there might be a difference in the temperatures acheived depending on whether it has to transform 220V or 110V. Or maybe not?

 

Seems like there are 2 versions of the adapter around. One with a 42TXXXX and another with a 92PXXXX FRU. I have one of each (90W), both with the manufacutring date on it. No problems with either of them.


NB: I don't own a X200, but AFAIK (corrrect me if I'm wrong), the newer Thinkpad adapters are compitable with all Thinkpads from T6X onwards.

 

Yes, I seem to recall reading that too.

Btw, mine is 65W - the smaller of the two.

 

I will post mine after i get it on monday.

 

65W 20V
P/N: 92P1160
FRU P/N: 92P1159
2009.04
REV: G

Mine gets appropriately warm. Cooler than my Macbook's (white, first gen) and Dell Latitude E6400's power brick. I actually had to replace my Macbook's white block because it got wrapped in some blankets during use and melted the wire. The E6400's brick would get scalding hot (i.e. couldn't hold it for more than 3 seconds after it had been going for a while).
Just thought I would share my power brick horror stories

From what I know about transformers, as an undergrad electrical engineering student, power in = power out w/ minimal loss. Since power is a product of voltage and current, a fixed power output (20V*3.25A = 65 W) and an increased input voltage (220V instead of 110V) would only mean it pulls less current from the wall (.3A instead of .6A). However, it may be optimized for 110V, which would make it hotter.

 

Thanks, Valbaca

 

That's the one I tried which didn't get so hot. The bad one has P/N 92P1156, FRU 42T5282, without date. I saw somewhere last night (don't remember where, some Lenovo document online) that problematic one is made by Delta, the "better" one is by LiteOn.