I have a Targus 4 hub usb 2 port model no. PAUH217U. I am using it on an older laptop computer that has 1 usb port. On the Targus there is a pin that looks like it is for an external power supply. Is this for an external supply and if so what is the voltage. Should I use an external power supply on it?
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Re: Power supply for Targus 4 hub usb 2
Most USB hubs do not need an external power supply, except when a connected USB device draws more power than the computer/laptop USB port can supply. In this case an external power supply will need to be connected to the USB hub. Normally this would be a 5 volt power supply, but make sure the polarity on the connector matches the power connector on the hub, check the label on the hub, sometimes it states to power requirements of the hub as well as the polarity on the connector. Normally the pin on the hub's power connector is positive (ie. +5V)
I got the same questio , i sen it to targus and they said that in deed is a port for ac adapter but there no info about the voltage either in the manual, the package, the hardware or in any site somebody know which is the correct adapter
Mine is model # PA055.. Power requirements are printed on the hub. [email protected] 2.1A (center pin is POS) getting ready to run a usb mouse & keyboard thru with NO power supply.. Will post updates..
My Targus hub has a split input/power lead. The power lead is red (ONLY supplies power) so both must be plugged in when using high power devices which sort of defeats the object of the bus if you have run out of spare ports as I have! I presume the power input socket of 5V and 2.6A max is a way around using the power USB lead. Note that the hub itself uses very little power, the 2.6A limit is the most that it can pass on to devices plugged into it. So plugging a Nokia charger of some 300mA will achieve nothing as the bus as it is can draw 100mA per socket to pass on.
My scanner draws 500mA and I presume the external HDD draws quite a lot too so I've had to plug these directly into the computer USB until I can find a power source for the hub.
Find any adapter that is a typical AC-DC adapter at 5V, the higher the Amperage the better (not above 2.6A of course). It is also amazing that this would need 2600mA! typical adapters provide a couple hundred mA... I found a 5V AC adapter providing 1.5A but the attachment is incorrect so I am severing the end and ataching one that fits. I'll update if it works!
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First off hubs don't support a lot of power hungry devices so you should be able to buy an optional power adapter for the hub on targus' site. Second if your computer doesn't have any usb 3 ports then the hub will only operate at usb 2 speeds.
Your probably overloading the hub. Buy the power adapter.
I Got off the phone with Acer Support...the lady with the heavy accent was very pleasant and informative. She told me to do System Restore and I have done so back to the 16th. Still no yellow marks in device manager everything says working properly. My flash drive still has no response but my blackberry power symbol shows up and charges but will not detect as a device in Computer. She recommended a "Full System Recovery" basically re-format. I really hope I don't have to do that I just bought this thing less than a month ago...I do a lot of computer work for others but no experience with windows 7 or vista and first time ever seeing a problem with USB.
This USB hub is not powered by an AC adapter. Therefore, some devices that need more power will not work well on it. You don't mention what it is you are pluggin into it, but I suspect this may be your problem. Devices like webcams pull way too much to be on a hub without AC.
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sometimes usb hard drives will not work through a usb hub.
if the drive works connected to the laptop but not the hub then that's how you'll have to use it.
it's also possible the laptop cannot power both the hub AND the drive, in whaich case you'll need a powered hub (one you plug in to the mains).
I devised these simple steps that tend to remedy quite a few issues with most portable / external hard drives and devices (though not always)
A few things to check but assumes USB and Windows for other interfaces / operating systems similar steps may be adapted to suit.
1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability
2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)
3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.
4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.
5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especialy true if you move a HUB to another port
If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.
Any exclamation marks by hardware need fixing before you investigate any further
this USB hub don't need any external power, but you are right there is
a power input connector comes with every Targus Usb hub. but these hub
self powered . you can use this hub without any worry.
This message would indicate any one of the following:
1. You have a lot of USB devices plugged in to your computer, and the maximum power supply for the USB ports has been exceeded by plugging this player to your computer. It would be best if you unplugged 1 or 2 of the USB devices connected for the time being.
2. You are plugging the player on your front USB port, and may need to plug it in the rear USB port to acquire ample power supply (front USB ports do not get as much power as the rear USB port -- sad but true)
3. You are using a laptop and may need to try another USB port on that computer. Purchasing a self-powered USB hub would be ideal as it gets its power supply directly from the wall electrical socket.