B.  Procedure
 S 864-002
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  
P6 Circuit Breaker Panel
 1) ATC 2

 (b)  
P18 Circuit Breaker Panel
 1) ATC 1

 S 024-014
 (2)  Do these steps to remove the ATC control panel:
 (a)  Loosen the quarter-turn fasteners on the control panel.
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ ATC CONTROL PANEL. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE ATC CONTROL PANEL.
 (b)  Pull the control panel out until you can get to the electrical connectors.
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 (c)  
Disconnect the electrical connectors from the control panel.

 (d)  
Remove the control panel.

 (e)  
Install dust caps on the electrical connectors.

 TASK 34-53-31-404-006
 3.  ATC Control Panel Installation______________________________
 A. References
 (1)  AMM 24-22-00/201, Electrical Power - Control
 B. Access
 (1)  
Location Zones
 101/102 Flight Compartment
 205 Electronic Compartment

 (2)  
Access Panel
 1201 Electronic Equipment Access Door

 C. Procedure
 S 864-010
 (1)  Make sure these circuit breakers are opened:
 (a)  
P6 Circuit Breaker Panel
 1) ATC 2

 (b)  
P18 Circuit Breaker Panel
 1) ATC 1

 S 424-015
 (2)  Do these steps to install the ATC control panel:
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ ATC CONTROL PANEL. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE ATC CONTROL PANEL.
 (a)  
Remove the dust caps from the electrical connectors.

 (b)  
Connect the electrical connectors to the control panel.

 (c)  
Install the control panel.

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 NOTE: ATC Mode S and ATC Non Mode S control panel are not
____
 interchangable.

 (d)  Tighten the quarter-turn fasteners on the control panel.
 S 864-011
 (3) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  
P6 Circuit Breaker Panel
 1) ATC 2

 (b)  
P18 Circuit Breaker Panel
 1) ATC 1

 D. ATC Control Panel Test
 (1)  S 864-024Supply electrical power (AMM 24-22-00/201).
 (2)  S 864-017Set the transponder select switch on the ATC control panel to the L or 1 position.
 (3)  S 864-018Push and hold the TEST switch on the front panel of the left ATC transponder. (a) Make sure the self-test passes and no faults are detected.
 (4)  S 864-020Release the TEST switch on the ATC transponder.
 (5)  S 864-021Set the transponder select switch on the ATC control panel to the R or 2 position.
 (6)  S 864-022Push the TEST switch on the front panel of the right transponder. (a) Make sure the self-test passes and no faults are detected.
 (7)  S 864-023Remove electrical power if it is not necessary (AMM 24-22-00/201).

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