Fluke Calibration 4322-SYS-NAVAIR, Service Manual

Page: 89 / 186

Controller Maintenance
Controller Part Replacement
4
4-37
Access the Electronics Box
Use the following instructions and reference Figure 4-20 to gain access to the electronics
box.
1.
Remove the mains power cord from the power entry module.
2. Use the instructions in “Chassis and Control Panel” on page 4-9 to remove the
chassis.
3. Remove the six screws and washers (

) that secure the electronic box cover (

) to
the chassis. The two power supply pca assemblies (items

and

) are attached to
the electronic box cover (

). Disconnect the wiring.
4. When finished with the part replacement procedure, reconnect the wiring and install
the six screws and washers (

) that secure the electronic box cover (

) to the
chassis.
5. Use the instructions in “Chassis and Control Panel” on page 4-9 to install the chassis
back into the case.
Power Supply PCA
Use the following instructions and reference Figure 4-20 to replace the power supply pca
(items

and

).
1. Use the instructions in “Access the Electronics Box” to open the electronics box.
2. After the cover is removed with the power supply pca assemblies attached, remove
the eight screws and washers (

) that secure the two power supply pca assemblies
(items

and

) to the electronic box cover (

).
3. Put the two new power supply pca assemblies (items

and

) in the electronic box
cover (

).
4. Install the eight screws and washers (

) that secure the two power supply pca
assemblies (items

and

) to the electronic box cover (

).
5. Use the instructions in “Access the Electronics Box” to close the electronics box.
Processor PCA
Use the following instructions and reference Figure 4-20 to replace the processor pca
(

).
1. Use the instructions in “Access the Electronics Box” to open the electronics box.
2. Remove the four screws and washers (

) that secure the processor pca (

) to the
main pca standoffs (

).
3. Install the new processor pca (

) on the main pca standoffs (

). Secure it with four
screws and washers (

).