GE Brivo OEC 715, Service Manual, Page: 229 / 551

Brivo OEC 715/785/865 Mobile C-Arm X-Ray Product Service Manual
4-18
If the footswitch or hand switch is released before completion, you should press the
switch again until the control panel LED displays “END END”.
If the “Er* Er*” is displayed on the control panel, you should redo the mA calibration
procedure from step 3.
16. Make sure the footswitch or hand switch is released. Remove the jumper on J5 and reboot the
system. Take exposure at 80kV, 0.1mA. Check the measured current value should be 0.20
±
0.01mA. Otherwise, adjust POT4 on MCB board. Clockwise rotation will increase the current. And
anticlockwise rotation will decrease the current.
17. Take exposure at 80kV, 2mA. Measure TP7 (MA-SMP) on MCB board with oscilloscope. Set
oscilloscope in TRIGGER mode and the trigger level is –250mV. The first pulse wave should be
orthogonal and the mA feedback curve shall be converged within 10ms, similar to the picture
below: