Hologic DISCOVERY A - Control Panel Controller Board; Power; Interface Connections

Discovery QDR Series Technical Manual
2-10
2.6 Control Panel Controller Board
The Control Panel Controller Board on the Discovery is a separate board under the table.
Its function is to interface the Scanner Operator Control Panel to the computer allowing
the software to determine the state of the Operator Control Panel switches, to define the
state of the various Operator Control Panel LEDs, and to control motor movement. The
board is located under the table at the head end of the scanner.
The Control Panel Controller communicates with the Operator's Console computer using
the asynchronous communications signals ARD and ATD of the communications buss and
the system control signals SYSRESET, XRAY_LIGHT, and EMERGENCY.
2.6.1 Power
The Control Panel Controller Board receives +7VDC from the Distribution Board. The +7
is reduced to +5VDC to power the circuitry on this board and is applied to the Operator
Control Panel to power the LEDs. A green LED, on this board, provides a visual
indication of the +5VDC power (ON indicates the voltage is present).
2.6.2 Interface Connections
Figure 2-5 shows the interconnections between the Distribution Board, Control Panel
Controller Board, and the Operator Control Panel.
Table 2-8 describes the interconnections between the Distribution Board and the Control
Panel Controller. Table 2-10 describes the interconnections between the Control Panel
Controller and the Operator Control Panel. The tables also identify the connectors and
their pin assignments.
+3.0VREF Precision positive voltage to Left/Right Pedestal
position encoder potentiometer.
JP3-1/JP2-1
(Position Signal) Left/Right pedestal position encoder wiper return
voltage.
JP3-3/JP2-3
-3.0VREF Precision negative voltage to Left/Right Pedestal
position encoder potentiometer.
JP3-4/JP2-4
Signal Description Pin