02-10-2008 01:19 PM - edited 02-10-2008 01:20 PM
sorry for my bad english.
First: In germany we use 240V as power supply.
I measured out, on each pedal of my G25 is a voltage @ 130Vac.
I noticed as i was under my desk and i touched my case an the pedal simultanesly.
What could be the reason? Everything is working flawless.
If someone of the Logitech support crew is reading... please give me an advice what I've got to do or if Logitech will replace it.
Thanks in advance!
Message Edited by xPRozACx on 02-10-2008 01:20 PM
02-26-2008 07:31 AM
02-28-2008 07:03 AM
03-04-2008 12:48 PM
After talking with some of the engineers, it appears the other users problem, if persisting, could be a corruption of the ground from his PC, or somehow something that puts out this voltage made contact with the pedals. We couldn't figure out how the AC adapter could generate a consistent 130V AC stream from looking at the schematics, but it's possible a poor ground inside his PC case could cause AC noise...
03-16-2008 05:01 PM
03-17-2008 09:54 AM
03-18-2008 03:55 AM
so no dirty ground of the pc cause it's not connected to the wheel!!
On my RMA G25 there's the same problem. When I plug out the USB the voltage is there.
It seems that the grounding will only be made by the pc. but it can't be ok, that i can
provocate such a voltage only by unplugging the usb!!?!
On the Cebit I spoke to the Product Manager D A CH Sven Simon.
After his holiday he'll check it for me.
03-22-2008 06:09 AM
04-02-2008 09:54 AM
Devices with integrated power supplies (e.g. PCs) with metal parts that can be touched are required to connect these metal parts to ground. To mains ground, not to the mains neutral. This is expensive if there are many different metallic parts.
The G25 has many metal parts (pedals, gear stick) that can be touched. If there was an integraded power supply Logitech was forced to connect these pedals to ground. There is, however a very cheap solution to this problem: use an external power supply - like Logitech does - that delivers 24 V only. Logitech is not alone with this solution, the same is true for many power supplies for small network/USB hubs or mobibles or e.g. Dell laptops. The output voltage is typically 5 to 24V, usually DC. This voltage is ideally independed from the mains phase and neutral.
Usually the metal parts are connected to the minus pole of the power supply output.
As I understand, the the metal pedals are at least connected to the ground signal of the USB port. Is that true?
Or are the pedals connected to the minus pole of the power supply output?
Maybe: Do you use a low-quality USB hub that might be the source of the 50V?