Hologic QDR 4500 Technical Manual page 45

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