Service manual

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION , REVISION
5-12 Section 5-5 - Power Diagrams
5-5-2 AC Power (cont’d)
The Transformer is the galvanic barrier between the rest of the scanner and the on site AC Mains. Input
voltage to the transformer can be either 230 VAC or 115 VAC or 100 VAC.
AC Power is supplied directly to the ATX PS (PC Power supply, located on the PC box) and to the HV
unit CRT Monitor and LV unit via ACI PCB.
When the Power switch is ON, this signal is outputted from VIC board to the following devices via
KBD>RPI>VIC> Mother board.
• The signal is sent to PC Box, then sent to ATX PS, so that the ATX PS is switched ON to apply DC
power to the PC.
• The signal is sent to ACI PCB so that the SSR is switched ON to apply AC power to the LV unit, HV
unit, and CRT monitor.
• The signal is sent to ACI PCB so that the SSR is switched ON to apply AC power to AC outlets of
the Rear panel/Front Panel
5-5-3 DC Power (Low Voltage)
AC110V is supplied to the LV unit via AC Box > Transformer > ACI PCB. This is multiplied and rectified
then step-downed to Low DC voltage to supply the devices/boards in the scanner.
The LV also support 12VDC for the system cooling fan.
DC Output Capacity:
• +3.3V, 20A
• +5VD, 14A
• +5V, 10A
• -5V, 3A
• +12V, 4A