Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 


188 posts

Master Geek
+1 received by user: 1


  Reply # 450202 20-Mar-2011 22:51 Send private message

Niel: Next to the un-fitted Molex connecter it says DCIN-1. Next to the fitted 4 pin connector it says DCIN-2. It is a DC input connector.


Damn, you have sharp eyes. It always appeared to me as DCN-1 and DCN-2 and made me wonder what the heck that meant, but on a closer look it's just that they printed I and N so close together that they appear as a single letter N.

I am not sure about the significance of compliance to the charging port standards or the implementation of a dedicated charging port. If standard USB ports can currently handle charging of attached devices (and probably my hub would have been fine to if I've connected it to power as I should have, and if I installed the ASRock charging utitlity), what is the significance of a standard then, or a dedicated USB-like charging port?

Right-o. I'll need to play with the cables a bit to make sure I can reach the USB hub from my PSU, but I'll chop off that tongue on the bottom of the berg connector and pray really hard that it does what it's supposed to do. I'll need to find a test machine for the 3G modem that is the primary candidate for faultiness and see if it works. I also noticed that I didn't describe how blew my mobo the last time entirely correctly. The TP-Link WiFi adaptor was connected to the internal port, not the external one. This can be significant because the internal port is labelled USB6 (USB5 is empty), but the headers are labelled USB5-2 and USB6-2, and they were both being used at the same time. It could be that I am not supposed to use both the headers and the internal port simultaneously...



188 posts

Master Geek
+1 received by user: 1


  Reply # 450211 20-Mar-2011 23:14 Send private message

Niel: The square solder pad has nothing to do with GND. It is the pin-1 identifier. On some connectors that happens to be GND, but a square pad does not mean GND.

They could have fitted the wrong connector, which is why it is not documented. Replacing the connector with the correct one will cost a lot more than the profit of selling it undocumented. Or it could have been designed for something like a Dell PC which has custom connectors, but they manufactured extras and sell them unbranded and without the power loom. Or it is just a bad copy.


True. I had another look at the back of the card, and pin-1 seems to be on the same circuit as pin-1 of the non-existant full 4-pin molex, terminating on B-side pins 59, 61 and 62, which makes it +5V, not ground. Bugger.  

gzt

3773 posts

Uber Geek
+1 received by user: 111

Subscriber

  Reply # 450226 21-Mar-2011 00:10 Send private message

It could be that I am not supposed to use both the headers and the internal port simultaneously...

That makes sense. The Belkin manual I read recently detailed a similar configuration with the same caveat.

2742 posts

Uber Geek
+1 received by user: 25

Trusted

  Reply # 450240 21-Mar-2011 07:10 Send private message

If it says e.g. USB5-1 and another says USB5-2, then it is very likely 2 connectors in parallel for 1 port and you should use only 1 at a time otherwise it will not work (but should not blow up). It can result in the PC thinking you have a USB 1.1 device attached if you use both -1 and -2 connectors of the same port.

The dedicated charging port is significant on netbooks and laptops. Long ago they were limited to 100mA with active current sensing, then 500mA. So there a dedicated charging port rated for 1.8A makes sense. Motherboard manufacturers do not waste money on current sensing and just allows more.

The small power connector is also 5V, GND, GND, 12V just like the large Molex connector. Middle 2 are GND on both.




You can never have enough Volvos!


2742 posts

Uber Geek
+1 received by user: 25

Trusted

  Reply # 450241 21-Mar-2011 07:12 Send private message

Just remembered, sometimes instead of protecting each port at 500mA a manufacturer will say protect 2 ports at 1A, or 3 ports at 1.5A. So if 1 port blows, you loose a few ports.




You can never have enough Volvos!




188 posts

Master Geek
+1 received by user: 1


  Reply # 450898 22-Mar-2011 19:56 Send private message

Last update. I trimmed the tongue on the berg FDD connector and connected it to the USB hub, rebooted, all seems to work just fine. Cool

Lias, mckenndk, gzt, Niel - thanks for all your help!

10172 posts

Uber Geek
+1 received by user: 272

Trusted
Subscriber

  Reply # 451646 25-Mar-2011 00:09 Send private message

If you do go the route of a hub with a power supply, check that it actually doesnt also try to back feed the PC from the power adapter.

I smoked up the power supply for a cheap 10 port that I got when I plugged it into the PC as the PC was off and the hub tried to power the PC. If you look online there are people that open them up and modify them to cut the power from the PC to the hub so they never run off or try to power the PC.

Also, even when the DC was not connected it reported that it was a powered hub so quite easy to take WAY more than 500mA from the PC.

I really wish that PCs would impliment per port limiting so that non compliant crap like those USB HDD cases with a Y cable and 2 plugs would throw errors instead of just being erratic and unreliable.




Richard rich.ms

1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic








Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when new jobs are posted to our jobs board:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:




News »

Trending now »
Hot discussions in our forums right now:

Telecom introduces unlimited broadband data plan
Created by freitasm, last reply by firefuze on 24-Apr-2014 13:30 (99 replies)
Pages... 5 6 7


Stonedine
Created by Lizard1977, last reply by mattwnz on 24-Apr-2014 15:45 (67 replies)
Pages... 3 4 5


Auckland Transport Hop card - look out for errors
Created by robjg63, last reply by sbiddle on 24-Apr-2014 20:48 (21 replies)
Pages... 2


Windows 8 System Mechanics
Created by eme, last reply by eme on 24-Apr-2014 21:10 (20 replies)
Pages... 2


Using my Mac to ring family in the UK
Created by Geektastic, last reply by nakedmolerat on 24-Apr-2014 11:28 (19 replies)
Pages... 2


Telecom has started metering their TiVo customers' broadband usage (WITHOUT PRENOTIFICATION)
Created by Peteriv, last reply by mattwnz on 24-Apr-2014 15:11 (74 replies)
Pages... 3 4 5


Forms of government for New Zealand
Created by charsleysa, last reply by gzt on 24-Apr-2014 21:36 (176 replies)
Pages... 10 11 12


Parallel imported product
Created by Wills1, last reply by joker97 on 23-Apr-2014 21:01 (53 replies)
Pages... 2 3 4



Geekzone Live »
Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.