JVC RX-D Series Training Book page 25

POWER SUPPLY 4/5
Use of the built-in ±2.5V regulated supply to the inside and outside digital
circuits, especially for master clock generation circuit, prevents digital
noise interference to analog GND.
+2.5V regulator built-in the IC supply to
digital circuit inside and outside of IC.
+7V
+2.5V
-2.5V
-7V