At the back of the PSU, there are are two rails (each individually selectable from 5V, 7 V, 9 V and 12 V). A fault LED (one for each DC output) will light up when it detects a fault (perhaps a short?). The fault light lit up when I tried to measure the DC across it. But powering it off and on again seems to reset the protection circuit. *phew*
Some quick tests shows the JS-2 unit itself is earthed, but the DC ground is isolated from the mains. If you previously ground your system via the PSU (e.g. like I did previously with the HDPlex), the system will have a floating ground with the JS-2.
The easy way to know if the audio system is still grounded is to run your fingers lightly over any metal surface of your Hifi after about 15 minutes of powering up - if you feel a funny sensation then your system has a floating ground.
With voltage set to 5 V, the output measures 4.95V; at 12 V, the output is 12.03 V. This could be a problem (for me I reckon the voltages are a tad too low) but my computer booted up fine, so perhaps not.
Comment from: luca pennone Visitor
Hi Agent Kith, i have read the entire upgrading process of the JS-2. it really makes me upset reading that you consider the HD Plex a toy after the upgrade!
the JS2 is really expensive, considering that shipping and custom fee to import are about $ 350. and 2 channels only.
not to mention the cost of the upgrades you have performed. But i am sure that you have now quite a perfect psu unit