Digital / DA Section (top):
Digital / DA Section (bottom):
Power Supply Section:
Remainder of Power Supply and Components for Front Panel:
Analog Audio / Component & Composite Video Out Section:
5.1CH Analog Out Section:
I've only had this unit in my hands for ~18 hours at this point, so I've not done much yet. I discovered this morning that disconnecting both of the ribbons to the 5.1CH out seems to have added a bit of additional clarity to the stereo analog outs.
At a glance, the power supply section looks like an obvious candidate for improvement. Some larger caps and a higher quality transformer to replace that itty bitty stock part would probably make a difference. The op amp on the analog output section appears to be a TI RC4558 running at +10v/-10v. I think I may start there. I only have a spare OPA2227 on-hand, which would probably be an upgrade, but an OPA2604 might be more worth the effort.
If anyone else has any experience with modding this unit, advice would be appreciated. If anyone has any questions, feel free to ask.