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W700 / W701 power connector

W500/510/520 and W700/710 series specific matters only
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86turbodsl
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W700 / W701 power connector

#1 Post by 86turbodsl » Sat Feb 13, 2016 4:10 pm

Will someone with a W700 power supply grab a caliper and measure the ID and OD of the power supply connector?

I've just picked up a W700 without a power supply, and having a hard time getting one for a reasonable price. There's a ton of 170W W520 adapters out there, and my thought was get a connector from digikey and attach to a W520 supply.

Any help?
T61p, RT61 frankenpad(the first), W500(s), T500, W700 (king beast)

RealBlackStuff
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Re: W700 / W701 power connector

#2 Post by RealBlackStuff » Sat Feb 13, 2016 4:27 pm

ID/OD from a 20V 65W/90W (for T60 etc.) and ID/OD from 20V/135W (for W500/W510) and ID/OD from 20V/170W (for W520 etc.) are identical.
Only difference: 170W has 2 extra "ribs" inside for the W520 socket "grooves".
If you cut/grind those "ribs" out, it will also fit on all other 20V Thinkpads with round plugs.
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86turbodsl
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Re: W700 / W701 power connector

#3 Post by 86turbodsl » Sat Feb 13, 2016 4:50 pm

RealBlackStuff wrote:ID/OD from a 20V 65W/90W (for T60 etc.) and ID/OD from 20V/135W (for W500/W510) and ID/OD from 20V/170W (for W520 etc.) are identical.
Only difference: 170W has 2 extra "ribs" inside for the W520 socket "grooves".
If you cut/grind those "ribs" out, it will also fit on all other 20V Thinkpads with round plugs.
I don't think a W700 power connector has the center pin however, so would yanking out the center pin allow fitment?
T61p, RT61 frankenpad(the first), W500(s), T500, W700 (king beast)

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Re: W700 / W701 power connector

#4 Post by RealBlackStuff » Sat Feb 13, 2016 5:28 pm

Can't help you here as I've never seen a W700 (170W or 230W) charger, but I have all 3 that I mentioned before.
My calipers are cheap plastic, ID= ~5mm, OD= ~7.5MM.
Why would W700 all of a sudden be different? Because they can???

86turbodsl
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Re: W700 / W701 power connector

#5 Post by 86turbodsl » Sat Feb 13, 2016 8:20 pm

Because this page says so?

http://www.thinkwiki.org/wiki/Power_Con ... _connector

It's also asking for confirmation, which is why i'm asking somebody with eyes on to measure with a caliper.
T61p, RT61 frankenpad(the first), W500(s), T500, W700 (king beast)

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Re: W700 / W701 power connector

#6 Post by FryPpy » Thu Feb 18, 2016 1:18 pm

86turbodsl wrote:Because this page says so?
http://www.thinkwiki.org/wiki/Power_Con ... _connector
It's also asking for confirmation, which is why i'm asking somebody with eyes on to measure with a caliper.
My measurment says: OD=6.3mm ID~4mm!
I belive that this is 170W not OEM power brick. W700 eats it without any warnings. But W701 (with damaged power connector that i have resoldered with original connector from W700) knows that it is low power brick but works fine. And i don't know where is the 3nd (signalling) contact in this connector. There is no central pin like in normal T6x+ power briks.

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Re: W700 / W701 power connector

#7 Post by automobus » Thu Feb 18, 2016 5:14 pm

RealBlackStuff wrote:Why would W700 all of a sudden be different? Because they can?
Ding, ding! "Because they can" is a correct answer. We also would have accepted "Because they are LeNOvo.".
</game show host>

ThinkWiki says so, because a single feeBay listing said so. At three years ago, I found no information about W700 power plug, neither to assent nor contradict the 6mm/3mm number.

Thank you for measuring your plug, FryPpy. Will you please state a tolerance of your ID estimate? Some ideas to estimate with greater precision:
  • get a 3,5 mm 3.5mm TS/TRS/mini-phono/"Sony Walkman headphone" plug, try and see how well it fits (tight, wiggle, loose) inside the W700 power barrel.
  • Find some small drill bits, what is largest measured drill bit which fits.
  • Find rod to fit inside barrel, such as 3.5mm TRS or pen ink tube, wrap sticky tape around said test thing until fit is tight, then measure circumference or outer diameter of the tape.

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Re: W700 / W701 power connector

#8 Post by FryPpy » Fri Feb 26, 2016 12:37 pm

automobus wrote:Will you please state a tolerance of your ID estimate?
The equipment () can measure with 0.02mm tolerance, but the inner diameter is small enought to use it right (i think tolerance is 0.1mm in this circumstances).
If you want see this picture.

86turbodsl
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Re: W700 / W701 power connector

#9 Post by 86turbodsl » Fri Feb 26, 2016 12:55 pm

Thank you so much everyone for posting in this thread. I have enough to go on now. If i do find a connector to fit this, and move forward, i'll post with results.

Thanks!
T61p, RT61 frankenpad(the first), W500(s), T500, W700 (king beast)

86turbodsl
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Re: W700 / W701 power connector

#10 Post by 86turbodsl » Tue Mar 08, 2016 12:35 pm

An update, i ended up finding a 220W power supply fairly reasonably, and abandoned the idea of a cable end swap with a 520. I did look, but didn't find much of a match anywhere.

If there's interest, i will put a very good mitutoyu caliper on the connector for posterity.
T61p, RT61 frankenpad(the first), W500(s), T500, W700 (king beast)

bit_twiddler
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Re: W700 / W701 power connector

#11 Post by bit_twiddler » Tue Mar 08, 2016 1:40 pm

If you cut/grind those "ribs" out, it will also fit on all other 20V Thinkpads with round plugs.
Do you happen to know if a 170W power supply which is so modified would work on
a T420, W510, and other Thinkpads that normally use a lower wattage supply?
It would be SO nice to have a single supply that worked with everything that I have.
Daily Drivers: W520 i7-2760QM | W520 i7-2860QM | T420 FHD IPS i7-2640m | W701
Others: W510 | 701C (on its shrine)
Non-TP: Dell m7510
Currently Experimenting With: T420s

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Re: W700 / W701 power connector

#12 Post by n2ri » Thu Mar 10, 2016 12:35 am

RealBlackStuff wrote:ID/OD from a 20V 65W/90W (for T60 etc.) and ID/OD from 20V/135W (for W500/W510) and ID/OD from 20V/170W (for W520 etc.) are identical.
Only difference: 170W has 2 extra "ribs" inside for the W520 socket "grooves".
If you cut/grind those "ribs" out, it will also fit on all other 20V Thinkpads with round plugs.

WHOA so your saying W500 needs an 135 watt PSU? I been running mine on a spare 90 Watt from my T61 since the W500 came (used) with a 65w that could have been used as a room heater lol. could lower watt power supply cause CPU etc to get hotter than normal or other issues? I thought the W520 was the 135w PSU that also used the larger battery like the W700

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Re: W700 / W701 power connector

#13 Post by RealBlackStuff » Thu Mar 10, 2016 6:24 am

That slipped through by mistake, 135W starts with W510.
I was also only describing the inner and outer diameters of their DC-plug!
The W500 is happy with the same 90W as the T60 etc. (but could also use the 135W and the 170W with modded DC-plug).

Lower watt power can cause CPU throttling and overheating of a charger.
These are observations from my experiences, not proven facts...

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Re: W700 / W701 power connector

#14 Post by n2ri » Thu Mar 10, 2016 3:14 pm

yes charger heat is another thing I also noticed with under powered PSU (also heat in the charger converter in laptop near battery plug which should have a thermister but dont)). all thinkpad support searchs at Lenovo as well as ebay show the 135w only on T410 and up series and omit W520 saying it can also use the 90w as its battery is similar just looks like 1 more cel than the T61 9 cel version plus a more robust connection to laptop. the 170w shows only for the huge battery on the W700 series and also used on the mini dock 3 with USB3 for both W520 (135w) and W700, still not sure how that dock fits a W700 lol but it still sells on ebay for $100 which is high for a dock of such limited use. I just dont think over sized PSU watts are good either for the laptop since it can damage it b4 limits shut it down.

I really love the T61 and W500 features and impressed by the W520 high end options but it dont use much components from those older series making limited parts availability or interchangeability like I currently enjoy with my T61/W500. plus the W520 still goes for min of about $400 used. I have done lots of research comparing all these models also youtube reviews and have scratched the W700/701 off my list of future Thinkpads as it has nothing over a properly built W520 for 98% of uses and adds more Cons than Pros one being on both sides of the list is the huge display nice to view/not nice to tote hehe. and the W700 series use much more power than the W520 when used for digital image processing and takes 2x as long to finish. also the 'small' addon display of poor resolution is a waste. digital Photographers would be better off with the W520 and an extra HD large monitor and the scratch pad external and carry them in seperate case when needed. save space and money while not requiring odd repair parts nor use so much power adding battery life. the W520 can replace most desktop PCs even. lots of very interesting youtubes on this.

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