Repair manual

2-12
THEORY OF OPERATION
C. Power Supply Module
1. AC Power
The Digital Palette operates from domestic or international commercial AC
Power (Figure 2-2) applied through the Main Power Switch and the Switchable
Voltage Selector.
Note
The Digital Palette meets domestic and international
power requirements. It automatically operates from
100/115 to 220/240 volts at 50/60 Hz, commercial
AC power.
When the Main Power Switch is set to its ON position, AC power is applied to
the Power Supply Module. A red LED on the upper right corner of the front
panel of the Digital Palette lights to indicate that power is turned on.
The Power Supply Module supplies regulated dc operating voltages to power the
Logic Controller P.C. Board. Regulated dc voltages from the Power Supply
Module are applied through connectors J51, J52, and J53 to the Logic Controller
P.C. Board.
2. DC Power
The Power Supply Module outputs the following regulated dc voltages through
connectors J51, J52, and J53 to the Logic Controller P.C. Board:
o +5 vdc
o -12 vdc
o +12 vdc
The regulated dc output voltages from the Power Supply Module are used to
power the following:
o Logic Controller P.C. Board.
o Monitor Assembly and P.C. Board via connector J9 on the Logic Controller
P.C. Board.
o Filter wheel stepper motor via connector J6 on the Logic Controller P.C.
Board.
o Camera back via connector J11 on the Logic Controller P.C. Board.
o Optional Small System Computer Interface (SCSI) via connector J10 on the
Logic Controller P.C. Board.