34-35-00

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

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 34-35-00

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 MARKER BEACON SYSTEM - ADJUSTMENT/TEST
______________________________________
 1.  General_______
 A.  This subject has two tasks. The tasks are; an operational test and a system test. The operational test uses only the test switch on the marker beacon receiver to do a check of the system. The system test uses external test equipment and does a full check of the marker beacon system.
 TASK 34-35-00-705-001
 2.  Marker Beacon System Operational Test_____________________________________
 A.  General
 (1)  You do this task to make sure the correct indicators come on when you push the test switch.
 B.  Standard Tools and Equipment
 (1)  Headset
 C.  References
 (1)  24-22-00/201, Manual Control
 D.  Access
 (1)  Location Zone
 101,102 Control Cabin
 205 Electronic Compartment

 E.  Procedure
 S 865-002
 (1)  
Do this task to supply electrical power: "Manual Control" (Ref 24-22-00/201).

 (2)
Permit 10 minutes for the marker beacon receiver to energize.

 S 715-004

 (3)  
Do the operational test of the marker beacon system:

 (a)  
Set the audio selector panel for the captain to the MKR position.

 (b)  
Connect the hedset to the interphone system.

 (c)  
Push-to-test the marker beacon indicator lights.

 S 865-003
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A
737-300/400/500MAINTENANCE MANUAL
 (d)  Push and hold the test switch on the front panel of the marker beacon receiver. 1) After approximately 5 seconds, make sure the blue, amber,
 and clear indicator lights come on in this sequence.
 2) Make sure you hear a sound through the interphone system
 which goes from a low frequency to a high frequency.

 S 865-005
 (4)  Do this task to remove electrical power if it is not necessary: "Manual Control" (Ref 24-22-00/201).
 TASK 34-35-00-735-006
 3. Marker Beacon System - System Test
__________________________________
 A. General
 (1)  The procedure in this task uses a ramp test set as a ground transmitter.
 B. References
 (1)  24-22-00/201, Manual Control
 C. Standard Tools and Equipment
 (1)  Ramp Test Set - Instrument Flight Research NAV-401L
 D. Access
 (1)  Location Zone
 101,102 Control Cabin

 E. Procedure
 S 865-007
 (1)  
Do this task to supply electrical power: "Manual Control" (Ref 24-22-00/201).

 S 865-008

 (2)
Permit 10 minutes for the marker beacon system to energize.

 S 715-009

 (3)  
Do this task: "Marker Beacon System Operational Test" (Ref Paragraph 2).

 S 735-010

 (4)  
Do the marker beacon system test:

 (a)  
Set the sensitivity control switch to the HIGH position.

 (b)  
Set the switch on the audio select panel to the MKR position.

 (c)  
Put the ramp test set directly below the marker beacon antenna.

 (d)  
Extend the antenna on the ramp test set to its full length.

 NOTE: Do not let the ramp test set antenna touch the marker
____
 beacon antenna.

 (e)  Align the antenna for the ramp test set along the front and aft axis of the airplane.
　
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