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Power Regulator Board Prb - Philips epiq 5 Training Manual

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The PWR_REG_ON signal
is high, +2.5 Vdc.
26
 Provides V_ACC for control panel articulation. (enable/disable
V_ACC using button on the system handle)
 Provides 5V_STBY for the power-on signal from motherboard.

Power Regulator Board PRB

The Power Regulator Board (PRB) performs a variety of functions
including power distribution, monitoring, temperature control and
high voltage generation for the front end.
It receives input signals from the power supply (VPPM):
Monitors 24VDC voltage from the VPPM. The Power Good signal is
output to the CB when above 24VDC is in range which allows the CB
to begin drawing power. If VDC_SYS not in range of +21.6Vdc to +30
Vdc the 24VDC from VPPM to power regulator board is disabled.
When the Power Regulator on signal (PWR_REG_ON) from the VPPM
indicates that the voltage from the VPPM is stable. Then the PRB is
capable of being powered up as determined by the signal from the
VPPM. When the signal is low, the PRB remains disabled.
Generates and regulates the following high voltage DC supplies for
the matrix transducers which it sends to to the Channel Board:
 CBHV+ from 0 to +250 Vdc
 CBHV- from 0 to -125 Vdc
 XHV+ from 0 to +110 Vdc
 XHV- from 0 to -110 Vdc
The PRB also regulates and provides the following DC supply voltages
to the Channel Board and Transducer Select board:
 +2.0 Vdc
 +2.3 Vdc
 +3.3 Vdc
 +3.8 Vdc
 -5.5 Vdc
 +5.5 Vdc
 -13Vdc
 +13Vdc
© 2016 Conquest Imaging
EPIQ 5 & 7 Training Manual

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