34-35-11

 ALL  ú ú 02 Page 404 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 MARKER BEACON RECEIVER - REMOVAL/INSTALLATION
_____________________________________________
 1.  General
_______
 A.  This subject has three tasks; a removal, an installation, and a test of the marker beacon receiver.
 B.  The marker beacon receiver is installed on the E2-4 shelf in the electronic equipment compartment.
 TASK 34-35-21-024-001
 2.  Marker Beacon Receiver Removal
______________________________
 A.  References
 (1)  20-10-07/201, E/E Rack Mounted Components
 B.  Access
 (1)  Location Zone
 205 Electronic Compartment

 C.  Procedure
 S 864-001
 (1)  Open this circuit breaker and attach a DO-NOT-CLOSE tag:
 (a)  P18 Load Control Center - Left
 1) MARKER BEACON

 S 024-008
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ MARKER BEACON RECEIVER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE FROM YOUR BODY CAN CAUSE DAMAGE TO THE MARKER BEACON RECEIVER.
 (2)  Do this task to remove the marker beacon receiver from the E2-4 shelf: "Remove the Rack Mounted E/E Box" (Ref 20-10-07/201).
 TASK 34-35-21-424-004
 3.  Marker Beacon Receiver Installation
___________________________________
 A.  References
 (1)  20-10-07/201, E/E Rack Mounted Components
 B.  Access
 (1)  Location Zone
 205 Electronic Compartment

 C.  Procedure
 S 864-003
 (1)  Open this circuit breaker and attach a DO-NOT-CLOSE tag:
 (a)  P18 Load Control Center - Left
 1) MARKER BEACON

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 34-35-21

 ALL  ú ú 01 Page 401 ú Mar 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 424-009
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ MARKER BEACON RECEIVER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE FROM YOUR BODY CAN CAUSE DAMAGE TO THE MARKER BEACON RECEIVER.
 (2)  
Do this task to install the marker beacon receiver on the E2-4 shelf: "Install" the Rack Mounted E/E Box" (Ref 20-10-07/201).

 S 864-005

 (3)
Remove the DO-NOT-CLOSE tag and close this circuit breaker:

 (a)  P18 Load Control Center - Left
 1) MARKER BEACON

 TASK 34-35-21-704-006
 4.  Marker Beacon Receiver Test___________________________
 A. Standard Tools and Equipment
 (1)  Ramp Test Set - Instrument Flight Research - NAV-401L
 B. References
 (1)  24-22-00/201, Manual Control
 C. Access
 (1)  Location Zone
 205 Electronic Compartment

 D. Procedure
 S 864-008
 (1)  
Do this task to supply electrical power: "Manual Control" (Ref 24-22-00/201).

 S 714-009

 (2)  
Do the marker beacon receiver test:

 (a)  
Put the ramp test set approximately 15 feet away from the marker beacon antenna.

 (b)  
Turn on the ramp test set.

 (c)  
Set the ramp test set to supply a 75 MHz signal with 400 Hz modulation. 1) Make sure the light for the OUTER marker beacon on the

 captains' instrument panel comes on.

 (d)  
Turn off the ramp test set.

 S 864-010
 (3)  Do this task to remove electrical power if it is not necessary: "Manual Control" (Ref 24-22-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 34-35-21

 ALL  ú ú 02 Page 402 ú Mar 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
　
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