THEORY OF OPERATION
4-30
Versapulse Select Service Manual
0621-499-01 01/94
®
®
12/95
After each pulse, the software checks the ENG I and ENG II signals for agreement, and then confirms
that the pulse energy was not excessively high or low. If any of these checks fail, the laser is inhibited
from firing and a fault is displayed on the touch screen.
Pulse interval (the period between the individual laser firings) is generated by a hardware timer.
Between pulses the Mµp checks flashlamp voltage, footswitch condition (is it still depressed?) and the
BRH interlock. In addition it checks one of the following four values on a rotating basis (one between
each pulse): +5 VDC, +12 VDC, -12 VDC, coolant temperature.
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