USER'S GUIDE____________________________________________________________________  
126 _________________________________________________________________ M210482EN-D 
10.  Connect the data line connector to the same position as it was 
connected to on the previous board. 
11.  Connect the power cable to connector J2. 
12.  Switch on the power with all three switches. Wait until the 
Laser 
on LED starts blinking at 2-second intervals. Make sure that all six 
diagnostic LEDs light up after the self-test. Refer to Figure 26 on 
page 111. 
The ceilometer unit should return to normal operation. Verify that the 
unit is working properly and that there are no failures with the system. If 
failures exist, separate troubleshooting may be necessary.