Racal Instruments AN/TRC-207, Operation And Maintenance Instructions

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TO 31R2-2TRC207-1
6-12
c. Replace the diplexer with a known good diplexer for the same frequency band. When replacing the
diplexer, ensure that the mounting holes on the bottom of the diplexer are aligned with the correct holes
on the frame so that the front of the diplexer is at the front of the frame.
d. Reconnect the coaxial cables to the diplexer: W3 to TX, W2 to RX, and W4 to ANT. Sheet 2 of Figure
1-1 shows the positions of each connector on the back of the diplexer. Ensure that the connectors are
finger tight. Refer to Figure 8-1 for correct interconnections.
6-5.2 Removal/Replacement Procedures - Repair Specialist
These procedures are authorized to be performed by the repair specialist only, and are in addition to those performed by
the operator. These procedures are not applicable to the operator. Prior to performing any remove/replace procedures,
ensure the equipment is powered down and disconnected from the power source and remove all accessories (antenna
cable). To replace components into the bi-directional repeater, reverse the removal procedures, unless otherwise directed.
Before performing removal/replacement procedures, make sure power is removed from the unit
by disconnecting from power source. Failure to do so could result in personal injury or equipment
damage.
ELECTROSTATIC DISCHARGE
The bi-directional repeater contains components that are susceptible to damage by static electrical
charges. Disassembly of the bi-directional repeater should only be done at a properly grounded
work station.
6-5.2.1 Repeater Control Circuit Card Assembly (CCA) (A1A2) (4101029-501) Removal/Replacement.
Remove/replace the repeater control CCA (A1A2) as follows:
a. Remove the bottom cover (20, Figure 7-2) by removing the 16 screws (7) that secure the bottom cover
to the chassis.
b. Unplug the repeater control CCA (A2) (21) by pulling evenly on the card connectors at each end of the
card.
c. Replace with a known good repeater control CCA (A2) by pushing evenly on the card extractors at each
end of the card. Ensure that the card edges are aligned with the tracks on the sides of the chassis.
d. Reattach the bottom cover by tightening the 16 screws that secure the bottom cover to the chassis.
When refitting the bottom cover to the chassis, check the EMI gasket (19) to ensure that it is
undamaged and properly seated.
6-5.2.2 Control Panel Assembly (A1A5) (4101032-501) Removal/Replacement.
Remove/replace the control panel assembly (A1A5) as follows:
a. Loosen the eight captive screws securing the control panel (29, Figure 7-2) to the bi-directional repeater
chassis (13).
b. Pull the control panel straight out from the chassis.
c. To replace, reverse the above steps.
WARNING
CAUTION