S 014-018
 (2)  Open the access door (117AL) of the electronics compartment to get to the ATC transponder (AMM 06-09-01/201).
 D.  Procedure
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 S 024-024
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ TRANSPONDER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN DAMAGE TO THE TRANSPONDER.
 (1)  
Remove the ATC transponder (AMM 20-11-22/401).

 S 434-037

 (2)  
Install dust caps on the electrical connectors.

 TASK 34-53-02-404-004
 3. ATC Transponder Installation
____________________________
 A. References
 (1)  
AMM 06-09-01/201, Body Section 41 Access Doors and Panels

 (2)  
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Module

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
IPC 34-53-02-01 Fig. 1

 B. Access
 (1)  
Location Zones 117/118 Electrical and Electronics Compartment

 (2)  
Access Panels
 117AL Electronics Component Access Door

 C. Prepare for Installation
 S 864-005
 (1)  Make sure these circuit breakers are open with DO-NOT-CLOSE tags attached:
 (a)  P7 Overhead Circuit Breaker Panel 1) 7B10 NAV RADIO ATC L 2) 7B22 NAV RADIO ATC R
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 D. Procedure
 S 034-025
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ TRANSPONDER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE TRANSPONDER.
 (1)  
Remove the dust caps from the electrical connectors.

 S 424-026

 (2)  
Install ATC transponder (AMM 20-11-22/401).

 E. Prepare for ATC Transponder Test
 S 864-007
 (1) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7B10 NAV RADIO ATC L
 2) 7B22 NAV RADIO ATC R
 3) 7B23 NAV RADIO ATC ANTENNA SW

 S 864-009
 (2)  
Supply electrical power (AMM 24-22-00/201).

 S 864-026

 (3)  
Set the transponder select switch on the ATC control panel to the applicable system (L or 1, R or 2).

 F. ATC Transponder Test
 S 744-044
 (1)  Push and release the TEST switch on the front panel of the applicable transponder.
 (a)  Make sure the sequence that follows occurs: 1) All of the front panel LED indicators come on.
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 2) All of the front panel LED indicators go off.
 S 864-014

 (2) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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