S 725-028

 (7)  
If the ATC control panel has an altitude source switch, do the altitude reporting test again with the altitude source switch set to the other position.

 S 865-029

 (8)  
Set the ATC system on STBY.

 S 865-030

 (9)  
Open these circuit breakers.

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

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

 S 865-143
 (10) Remove electrical power if it is not necessary (Ref 24-22-00/201).
 TASK 34-53-00-735-116
 4. ATC System Test - Using TEL-Instruments T-33B 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 a ramp test set to examine the left and the right ATC system.
 B. Standard Tools and Equipment
 (1)  ATC Transponder Ramp Test - T.I.C. T-33B
 C. References
 (1)  AIRPLANES WITH EFIS;
 AMM 34-11-01/501, Pitot Static System

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A 737-300/400/500MAINTENANCE MANUAL
 (2)  
AIRPLANES WITH EFIS;
 AMM 34-11-00/501, Pitot Static System

 (3)  
AIRPLANES WITHOUT EFIS;
 AMM 34-12-00/501, Air Data Computer System

 (4)  
AIRPLANES WITH EFIS;
 AMM 34-12-01/501, Air Data Computer System

 (5)  
34-22-00/201, Manual Control

 (6)  
34-53-11/401 Antenna Removal/Installation

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

 (2)  
Access Panels
 1201 Electronic Equipment Access Door

 E. Prepare for the System Test
 S 715-031
 (1)  
Do the ATC System - Operational Test.

 S 025-032

 (2)  
Remove appropriate ATC antenna (Ref 34-53-11/401).

 S 865-033

 (3)  
Connect the antenna end of transmission line to the T-33B test set as follows:

 CAUTION: DO NOT CONNECT THE TEST SET'S TNC CONNECTOR DIRECTLY TO
_______ THE ATC TRANSPONDER. THIS WILL CAUSE DAMAGE TO THE TEST SET.
 (a)  
The antenna must be disconnected from the TNC connector and protector cap must be installed on this TNC connector to prevent signals leak.

 (b)  
Connect a six foot test cable to the TNC connector on the test set.

 (c)  
With the right adapter, connect the other end of test cable to the ATC antenna transmission line.

 S 865-034
 (4)  Set the test set controls on the test set as follows:
 RCVR SENS - 65
 1090 - Zero
 REPLY/SLS - 100%
 MODE - 3/A
 READOUT - PILOT

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737-300/400/500MAINTENANCE MANUAL
 S 865-035
 (5)  Turn on the test set. Make sure the BATTERY CHECK meter is in the white part of the scale. If it is not, recharge the battery from a 115V AC 50-400 Hz source.
 NOTE: You can operate the test set while the battery is being
____
 charged.

 F. ATC System Test
 S 865-036
 (1)  Close these circuit breakers
 (a)  
P6 Load Control Center - Right
 1) ATC-2
 2) DADC RIGHT
 3) ALTM FIRST OFFICER
　
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