5. Removal and Replacement of Major Components and Modules
5-55
K. DAUGHTER PCB (Reference Drawing: 403-00107)
Removal
1. Ground strap must be worn.
2. Remove the instrument cover (See Step A Removal, 1 - 7)
3. Remove AC/DC PCB. (See Step B.)
4. Remove Pump Motor. (See Step X.)
5. Unplug all cables connected to Daughter PCB.
6. Remove 12X pan head Phillips screws & 2X nylon washers
attaching Daughter PCB to Support Housing.
7. Remove Daughter PCB and store in a static proof bag.
Installation
1. Ground strap must be worn.
2. Apply Teflon grease to the pressure transducer ‘O’ ring.
3. Carefully insert Daughter PCB into Support Housing. Make certain
the 4X Micro Sensors on the back of the PCB are not bent and the
pressure transducer is seated correctly in its receptacle.
4. Reinstall 12X pan head Phillips screws & 2X nylon washers.
Figure 5.
5. Reattach all cables connected to Daughter PCB. Figure 5.
6. Reinstall Pump Motor. (See Step X.)
7. Reinstall AC/DC PCB. (See Step B.)
8. Reinstall the instrument cover. (See Step A Installation, 1 - 5)
9. Perform “Pressure Transducer’ calibration.
10. Perform a System Operational Check-Out, Chapter 7.
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