n2ize
10-06-2008, 07:52 PM
Howdy, just ran into an interesting problem. I have this Logitech stereo headset. It consists of a pair of headphones and a mic. It is designed to be plugged into a USB port and along the cord there is a small enclosure which contains a little tiny circuit board which is in effect a tiny USB soundcard. Data goes in via the USB port and sound comes out the other end into the headphones. It's a great way to get sound on a computer without a sound card plus, the sound quality of the headset is not half bad.
Today the headset met with a disaster. As I got up from my desk the cable got tangled around my foot and WMAMMO. I ripped the USB cable right off the little circuit board. The wire that got ripped off is the cable facing the USB port on the computer.
I opened the circuit board up abnd I can clearly see where the wires go. Damage was minimal so, fortunately, I can solder them back in place. There is only one small tiny problem. I have no idea which wire goes into which position. There are 5 wires and 5 contect points. I can try all 120 permutations and eventually it will work or, I can damage the tiny microprocessor by applying voltage to the wrong pins.
Any ideas ? I checked online but could not find a picture or a wiring diagram for that particular circuit board headset. Logitcch is about as helpful as a bad case of the flu. The wires are as follows... a shield, black, red, green and white.
I understand that white and green are generally data lines, one being Data - and the other Data +. The black is usually ground and the red +5V. The shield I am not too sure about.
The problem is there a practical way to determine what goes where. I can probably figure where the ground goes. If I can figure out where the red wire goes I can probably juggle the white and green data lines and eventually figure out where they go. At least it will be 2 permutations instead of 120 !!!
Any help, ideas appreciated.
In a worst case scenario I can clip out the circuit board altogether and wire the thing up as a regular audio headset that can be plugged into any regular sound card.
I guess what I am asking amounts to this, anyone have one of these things and are willing to dissect it and post the wiring order ?
Today the headset met with a disaster. As I got up from my desk the cable got tangled around my foot and WMAMMO. I ripped the USB cable right off the little circuit board. The wire that got ripped off is the cable facing the USB port on the computer.
I opened the circuit board up abnd I can clearly see where the wires go. Damage was minimal so, fortunately, I can solder them back in place. There is only one small tiny problem. I have no idea which wire goes into which position. There are 5 wires and 5 contect points. I can try all 120 permutations and eventually it will work or, I can damage the tiny microprocessor by applying voltage to the wrong pins.
Any ideas ? I checked online but could not find a picture or a wiring diagram for that particular circuit board headset. Logitcch is about as helpful as a bad case of the flu. The wires are as follows... a shield, black, red, green and white.
I understand that white and green are generally data lines, one being Data - and the other Data +. The black is usually ground and the red +5V. The shield I am not too sure about.
The problem is there a practical way to determine what goes where. I can probably figure where the ground goes. If I can figure out where the red wire goes I can probably juggle the white and green data lines and eventually figure out where they go. At least it will be 2 permutations instead of 120 !!!
Any help, ideas appreciated.
In a worst case scenario I can clip out the circuit board altogether and wire the thing up as a regular audio headset that can be plugged into any regular sound card.
I guess what I am asking amounts to this, anyone have one of these things and are willing to dissect it and post the wiring order ?