QDR
®
4500 Technical Manual
2-34
protection for each power line using resettable circuit breakers with visual fault indication
located on the Power Control Panel.
The Power Board contains the connectors to all power supplies, circuit breakers, and key lock
switch. It also contains two relays that switch power to the Scanner’s X-Ray unit and to an
external X-Ray On light. Indicators on the Power board, provide visual indication of the status
of the +15, -15, and 24VDC voltages and of the X-Ray enable signal.
Figure 2-18 provides a block diagram of the Power Module. Table 2-24 identifies the Power
Module connectors.
Table 2-24. Power Control Board Connectors
Connection Connector
AC power in from transformer P17
AC power to Computer circuit breaker P15
AC power to Power Strip (Computer, Monitor, Printer power) P16
AC power to 15V power supply circuit breaker P5
AC power to 15V power supply P4
+/-15VDC from 15V power supply S2
AC power to DC power supply circuit breaker P7
AC power to DC power supply P6
Enable signal to DC power supply and +24VDC from DC power supply S1
X-Ray Enable Key switch S4
AC power to X-Ray Controller circuit breaker P11
AC power to X-Ray Controller P12
AC power to Aux X-Ray Lamp Outlet circuit breaker P13
AC power to Aux X-Ray lamp outlet P14
AC power to Left Pedestal circuit breaker P8
AC power to Right Pedestal circuit breaker P10
AC power to TZ Drive Controller (Left/Right Pedestal) P9
DC voltages to Scanner and Emergency signal from Scanner S3
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