B.  References
 (1)  AMM 24-22-00/201, Manual Control
 C.  Access
 (1)  
Location Zones
 101/102 Flight Compartment
 205 Electronic Compartment

 (2)  
Access Panel
 1201 Electronics Equipment Access Door

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 D.  Prepare for the Operation Test
 S 865-004
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-005

 (2)  
Close these circuit breakers.

 (a)  
P18 Load Control Center - Left
 1) ATC 1
 2) DADC LEFT
 3) ALTM CAPTAIN

 (b)  
P6 Load Control Center - Right
 1) ATC 2
 2) DADC RIGHT
 3) ALTM FIRST OFFICER

 E.  Procedure
 S 865-236
 (1)  
On the ATC control panel, set the transponder select switch to the applicable system.

 (a)
Start the self test on the front of the transponder.

 (b)
Make sure the LEDs sequence that follows occurs:

 1)  All LEDs comes on for about one second All red LEDs go off The green LED stay on

 (c)  
Release the TEST switch.

 (2)  
Set the ATC system to STBY.

 S 865-253
 TASK 34-53-02-735-049
 3.  System Test - ATC System (With the IFR ATC-601 Test Set)________________________
 A.  General
 (1)  This system test is a more complete check of the ATC system. The system test first does the ATC - Operational Test. Then it uses ground test equipment to examine the left and right ATC systems.
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 (2)  The IFR 601 test set is used to test the functionality of the mode S transponder. All twenty tests can be run automatically in the AUTO mode or individually in single test mode. Results from the last test are shown on each test page. The PASSED/FAILED indication is shown on top of the page. To do a single test, use the select keys to get to the desired test and push the RUN/STOP key.
 B. Special Tools and Equipment
 (1)  ATC Transponder Ramp Test Set IFR ATC-601
 C. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 34-12-01/501, Air Data Computer System

 D. Access
 (1)  Location Zones
 101/102 Flight Compartment
 205 Electronic Compartment

 E. Prepare for the System Test
 S 845-050
 CAUTION: DO NOT PLACE THE REMOTE TEST SET ANTENNA CLOSER THAN 15 INCHES
_______
 (0.40 METERS) TO THE AIRCRAFT ANTENNA WITH THE TEST SET ON. THIS WILL CAUSE DAMAGE TO THE TEST SET.
 (1)  Put the test set antenna approximately 30 feet from the ATC antenna for the related system.
 NOTE: The test set antenna must be within the line of sight of the
____
 ATC antenna.

 S 845-051
 (2)
Put the test set antenna in position towards the aircraft antenna.

 S 845-052

 (3)  
Connect the coax cable from the remote test set antenna to the test set.

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 (4)  S 865-053Close these circuit breakers: (a) P18 Load Control Center - Left 1) ATC 1 2) DADC LEFT 3) ALTM CAPTAIN (b) P6 Load Control Center - Right 1) ATC 2 2) DADC RIGHT 3) ALTM FIRST OFFICER
　
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