Hologic QDR 4500 - Page 45

Section 2 - Functional Description
2-23
Table 2-13. Low Voltage Power Supply Board/PFR Substitution Board
Interconnection Descriptions
Signal Description
LVPS
Pins
PFR
Pins
UNREG20V+
UNREG20COM
UNREG20-
Not Used. JP1-1
JP1-2
JP1-3
JP3-1
JP3-2
JP3-3
SW_120V_(A)
SW_120V_(N)
SW_120V_(B)
Generates energy storage capacitor voltage. JP4-1
JP4-2
JP4-3
JP1-1
JP1-2
JP1-3
Table 2-14. Low Voltage Power Supply Board/I/O and Logic Board
Interconnection Descriptions
Signal Description
LVPS
Pins
IOL
Pins
SW_ON* Turns on the main power relay on the Low Voltage Power Supply
board
JP7-6 JP2-1
AC_TICK Used for generating the line frequency clock signal. JP7-1 JP2-6
+5V_(P)
DGRND_(P)
-15V_(P)
AGND_(P)
+15V_(P)
Provides power for the I/O and Logic and Duty Cycle Driver
boards.
JP5-8
JP5-7
JP5-6
JP5-5
JP5-4
JP1-8
JP1-7
JP1-6
JP1-5
JP1-4
FIL120VAC_(N)
FIL120VAC_(A)
Provides the AC power for the primary winding of the X-Ray tube
filament transformer.
JP5-2
JP5-1
JP1-2
JP1-1
Table 2-15. Low Voltage Power Supply Board/Interlock Switch
Interconnection Descriptions
Signal Description
LVPS
Pins
RELAY_PWR
RELAY+
Provides the DC voltage to operate the main power relay on the
Low Voltage Power Supply board
JP6-2
JP6-1