Chapter 8 ___________________________________________________________________Repair
VAISALA______________________________________________________________________ 121
The ceilometer unit should now return to normal operation. Verify that
the unit is working properly and that there are no other failures with the
system. If other failures exist, separate troubleshooting may be necessary.
Replacing Laser Monitor Board CLM311
Refer to number 15 in Figure 22 on page 104.
CAUTION
Servicing the equipment must only be performed by qualified
maintenance personnel.
0910-109
Figure 31 Laser Monitor Board CLM311
To replace Laser Monitor Board CLM311, you will need a 2.5 mm
Allen-key and a calculator. The Optics unit and transmitter module have
to be removed before replacing CLM311.
Then proceed as follows:
1. Open the measurement unit door and switch off the power with all
three switches (F1, F2, and battery). For the location of the
switches, see Figure 15 on page 40 and Figure 16 on page 41.
WARNING
Disconnect the power cable from connector J2 before continuing.
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