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Replaceable fuse inside the 170w power supply?
Replaceable fuse inside the 170w power supply?
Hi,
got my W530 home today. It was in mint condition and came with the 2.7ghz quad core cpu, 8gb of 1600mhz ram, 500gb drive and..... not working power supply (which was cosmetically great also).
I have contacted the seller already regarding this, but i'm still curious: do the power bricks contain any fuse inside? I measured the tip of the cable going into the back of the W530 and there was no voltage whatsoever coming out of the power supply.
got my W530 home today. It was in mint condition and came with the 2.7ghz quad core cpu, 8gb of 1600mhz ram, 500gb drive and..... not working power supply (which was cosmetically great also).
I have contacted the seller already regarding this, but i'm still curious: do the power bricks contain any fuse inside? I measured the tip of the cable going into the back of the W530 and there was no voltage whatsoever coming out of the power supply.
W530 3940xm/32gb/520/240/240gb ssd, FHD
T410 w. I7-640m, 8GB, 240+128gb ssd hd, 1440x900
X61 w. T7500, 8GB, 240gb ssd, 1400x1050
760E
380ed
365xd
360cs
701cs
T21
T590 (work machine)
T410 w. I7-640m, 8GB, 240+128gb ssd hd, 1440x900
X61 w. T7500, 8GB, 240gb ssd, 1400x1050
760E
380ed
365xd
360cs
701cs
T21
T590 (work machine)
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- Senior ThinkPadder
- Posts: 3831
- Joined: Mon May 28, 2012 5:49 am
- Location: Metro Manila, Philippines
Re: Replaceable fuse inside the 170w power supply?
There's a fuse inside most laptop chargers/AC adapters, usually rated for 240v maybe 2 or so amps (can't remember exactly ), but it's soldered to the circuit board rather than in a fuse holder.
Also, use the multimeter's continuity test mode on the detachable power cord. Sometimes the problem lies there.
Also, use the multimeter's continuity test mode on the detachable power cord. Sometimes the problem lies there.
Planned Purchase: T480s i5-8350 FHD Touch
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
Re: Replaceable fuse inside the 170w power supply?
There is a relative easy way to convert an ordinary power charger, as small as 65 W, to work with the W540. I saw that on Lenovo forums, or maybe here. Basically you order an adaptor for a few bucks from the charger round plug to the square power connector format. Open up the square plug in the adaptor and take out the resistor and replace it with a 1,800 ohm resistor. It is recommended to use a 90W or 130W charger.
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Re: Replaceable fuse inside the 170w power supply?
While substituting the resistor inside the connector is a means to fool the laptop into thinking it is connected to a different (usually, higher power) AC adapter, I would NOT recommend doing this. The adapter may not be able to supply enough current to charge the battery and operate the computer at the same time. You could be operating the adapter past its design limits. That may lead to an overheating condition and possibly a fire.
Ray Kawakami
X22 X24 X31 X41 X41T X60 X60s X61 X61s X200 X200s X300 X301 Z60m Z61t Z61p 560 560Z 600 600E 600X T21 T22 T23 T41 T60p T410 T420 T520 W500 W520 R50 A21p A22p A31 A31p
NOTE: All links to PC-Doctor software hosted by me are dead. Files removed 8/28/12 by manufacturer's demand.
X22 X24 X31 X41 X41T X60 X60s X61 X61s X200 X200s X300 X301 Z60m Z61t Z61p 560 560Z 600 600E 600X T21 T22 T23 T41 T60p T410 T420 T520 W500 W520 R50 A21p A22p A31 A31p
NOTE: All links to PC-Doctor software hosted by me are dead. Files removed 8/28/12 by manufacturer's demand.
Re: Replaceable fuse inside the 170w power supply?
Hi all,
i ended up purchasing two (!) power bricks (well, one by accident in a sense) so i'm good. Besides, dealing with the inner workings of the failed one seemed a tad dangerious also
Thx for very good input.
i ended up purchasing two (!) power bricks (well, one by accident in a sense) so i'm good. Besides, dealing with the inner workings of the failed one seemed a tad dangerious also
Thx for very good input.
W530 3940xm/32gb/520/240/240gb ssd, FHD
T410 w. I7-640m, 8GB, 240+128gb ssd hd, 1440x900
X61 w. T7500, 8GB, 240gb ssd, 1400x1050
760E
380ed
365xd
360cs
701cs
T21
T590 (work machine)
T410 w. I7-640m, 8GB, 240+128gb ssd hd, 1440x900
X61 w. T7500, 8GB, 240gb ssd, 1400x1050
760E
380ed
365xd
360cs
701cs
T21
T590 (work machine)
Re: Replaceable fuse inside the 170w power supply?
For our daily driver Thinkpad, we always have three (!) power bricks at ready:
~One at work
~One at home (hey, it is a notebook, right?)
~One permanently packed into our travel bag, ready to go at a moment's notice!
~One at work
~One at home (hey, it is a notebook, right?)
~One permanently packed into our travel bag, ready to go at a moment's notice!
Daily Driver: (X1E3) X1 Extreme 3rd Gen | mobile broadband (WWAN)
Current Thinkpads: X1E3 | X1E1 | X1C10 | X1C9 | X1C4 | X1C3 | X230
Retired Thinkpads: X250 | T410 | T42 | 560 (circa 1996)
Current Thinkpads: X1E3 | X1E1 | X1C10 | X1C9 | X1C4 | X1C3 | X230
Retired Thinkpads: X250 | T410 | T42 | 560 (circa 1996)
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- Senior ThinkPadder
- Posts: 3831
- Joined: Mon May 28, 2012 5:49 am
- Location: Metro Manila, Philippines
Re: Replaceable fuse inside the 170w power supply?
IIRC there's a capacitor on the primary side (operating at mains voltage) which presents a shock hazard even when unplugged.
Planned Purchase: T480s i5-8350 FHD Touch
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
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