Hi everyone. I'm having some trouble reading this schematic for a casio keyboard, and I was hoping that someone with more knowledge and experience could look at it and maybe see what I don't. I was hoping to power it from a 9.6v rechargeable battery instead of 4 D batteries. I suspect that the 0.6v overhead would pose no problem, but I wanted to check the schematic to see what sort of regulation happens inside. That's where I got stuck.
The whole schematic is at [URL]http://www.burnkit2600.com/manuals/CASIO_CZ-1000_SRV.pdf[URL] on page 4, but the attachment shows the part that I'm asking about, with parts of it color-coded. I shaded what I believe to be ground in green, and what I believe to be the positive power from the battery/power supply in red. The dashed red looks like it's the positive rail, but I'm not so sure about it. In blue there are three things I don't understand.
1. There are two diodes in parallel. I figured that they were there to do some sort of regulation, but if my dotted red is the positive rail, it looks like the two ends are shorted together.
2. It looks like there is a short between the positive and negative where I labeled "looks like a short".
I'd appreciate it if anyone could help me understand the schematic; I'd also be interested in advice about just whacking in a 9.6v battery.
Thanks!