Specifications

6. POWER DISTRIBUTION
The DF uses three DC power levels: +24 volts, +12 V, and +5 V.
When the main switch is turned on, the optional transformer receives the wall
outlet ac power through the ac drive board and outputs 10 volts ac and 26
volts ac to the optional dc power supply board. The optional dc power supply
board then converts the 10 volts ac input to +5 volts dc and the 26 volts ac
input to +24 volts. Then, thoes two dc voltsges are supplied to the DF main
board.
The regulator IC on the DF main board further steps down the +24V to +12V.
115Vac
26Vac
10Vac
Optional
Transformer
(TR2)
DF Main Board
(PCB1)
220/240Vac
AC Drive Board
(PCB2)
Optional
DC Power
Supply Board
(PCB5)
Regulator
IC
5V
+12V+24V
+24V (VA)
+5V (VC)
1 December 1990
8-8