-30V power supply for HTS6520
Okay, got it. It was pretty simple. Swap the main PSU with another more powerful one, 3A 12V (maybe other was not powerful enough for some reason). Made a mistake in the pinout schematic, there is no +5 rail required, this is the SPDIF out. Hopefully it is not blown by attaching 5V to it. The SPDIF out makes it possible to attach it to an amplifier or SPDIF to analog converter (can buy this for a few euros). The other power supply provides 12V and with a step-up converter it provides the required -30V rail.
This is working great! The volume, ambi sound and the FM-tuner is not functional and some inputs not working because this is implemented in the subwoofer. That is why there is a Serial connection to 'talk' to the main subwoofer/amplifier unit. Maybe it is possible to figure out the commands (with an Arduino for example). However, it can play discs (with HDMI sound), play USB sticks and can access the ipod dock (no Ipod to test it).




Display is crisp and bright, as it should be. Very happy with this test setup. Next step is to measure the currents (not listed in SM) and to create a custom easy to use all-in-one PSU for it and replace the connector board with something else, more frequently used. Next idea is to add a SPDIF socket and a build-in power amplifier (to create a boombox style unit, on top of a set of speakers).
As you can see, worth to try it and save it from the landfill. Thank you Philips for such great modulair construction and great documentation. ;-)