Rev F Maintenance 6-3
6
3. Grasp the RF module handles and pull the RF module straight out of the housing.
4. Ensure that the MAIN FUSE is removed from the new RF module. If not, remove it. Refer to
Fuse/Brass Shorting Bar (Slug) Replacement on page 6-1 for fuse removal and installation
procedures.
5. Orient the replacement RF module so that the RF module banana pins align with the
receptacles located on the centerseizure assemblies.
6. Firmly press the replacement RF module into the housing until the back of the RF module
bottoms against the inside of the housing.
7. Using a flat-blade screwdriver, start the captive Module Hold Down screws into the housing.
Alternately tighten the screws to prevent stressing the module or housing. Torque to between
25 and 27 in-lbs (2.8 and 3.1 N·m).
8. Remove the plug-in accessories from the old RF module and install them into the
replacement RF module.
9. Install the MAIN FUSE and/or the THRU POWER FUSE. Refer to Fuse/Brass Shorting Bar
(Slug) Replacement on page 6-1 for fuse removal and installation procedures.
10. Perform the Forward and Reverse Field Tests. Refer to Chapter 5.
H. E. Power Supply Replacement
1. Disconnect the Power Plug from RF module POWER PLUG connector by squeezing the tabs
on the Power Supply module Power Plug and pulling straight out.
2. Use a flat-blade screwdriver to loosen, but not remove, the four Power Supply Module Hold
Down screws.
3. Firmly grasp the Power Supply module, slide it toward the RF module, and pull it straight out
of the housing.
4. Orient the replacement Power Supply module so that the four Hold Down screw holes align
with the four captive Module Hold Down screws in the housing cover. Install the Power
Supply module onto the screws and slide it away from the RF module.
5. Tighten the Power Supply Module Hold Down screws with a flat-blade screwdriver.
Reconnect the Transponder power cable if present.
6. Connect the Power Supply Plug to RF module POWER PLUG connector.
7. Configure the Power Supply according to Power Supply Configuration on page 4-1.
WARNING: Hazardous voltages are present. Use approved safety equipment and
procedures.
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