Product Manual

GE HEALTHCAREDRAFT VOLUSON® P8 / VOLUSON® P6
DIRECTION 5450839-100, REVISION 5 DRAFT (JANUARY 17, 2013) BASIC SERVICE MANUAL
Chapter 5 - Components and Functions (Theory) 5-41
5-10-1-3 Power Up Sequence Description
The Power Up Sequence can be divided in the following steps:
• Switch Circuit Breaker in CPS to ON position
• Press the ON button on the Operator Panel
• RFS power-up
5-10-1-3-1 Power Up Sequence Description
1.) RFS, powered by 5Vstb, detects contact of Power-On button event.
2.) RFS sends PSON_N low to CPS
3.) CPS powers up +24V, +12V,
±5V
4.) CPS provides LV_OK as soon as +12V is within specification
5.) CPS provides PC voltages from +12V, +5V.
6.) RFS distribute enable signals for +3.3V, +2.5V, +1.2V, +1.1 to itself and BF64.
7.) RFS provides PS_DONE output signal to CPS.
8.) All Supply voltages are switched on
Figure 5-21 Power Up Sequence