DC Power Distribution
Circuit/Mechanical Descriptions
This section applies to the outputs of PS1, PS2, and PS3 power supplies. When you turn on the Workstation, AC operating power
and KEY POWER control power combine to energize these power supplies.
PS1 Output
The J1 connector outputs of PS1 are 3 lines of +5VDC, 1 line of+12VDC, 1 line of –15VDC, and 1 line of +15VDC, as shown in
the following subsections.
+5VDC Output
For an illustration of the PS1 +5VDC output, refer to the following diagram:
All 3 lines of the+5VDC outputs connect to the Power/Motor Relay PCB at P8. On the PCB, Fuse F6 protects an unused pair of
outputs on Connector P11. F7 protects one line outputting on Connector P9, leading to the Hand Switch.
Three additional outputs from the Power/Motor Relay PCB are provided on Connector P8; all three lead to P4 of the Power/Signal
Interface PCB. P4 provides paths to two fuses, F9 and F12.
Through F9, +5VDC passes to the Backplane and the Generator Driver PCB. On the Backplane, the +5VDC is used by the three
PCBs that sit on it---Fluoro Functions, X-Ray Controller, and HV Supply Regulator. The +5VDC going to the Generator Driver
PCB becomes the reference voltage for the board.
Through F12, +5VDC passes to the Control Panel Processor I/O PCB, where it is used as reference voltage for the board (VCC),
and also for alarm circuitry (ALARM +5V). Both are then provided to the Control Panels and the Control Panel Processor PCB.
2
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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