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A 737-300/400/500MAINTENANCE MANUAL
S 424-044
(4) Do this task to install the applicable navigation unit: Install the Rack-Mounted E/E Box (Ref 20-10-07/201).
S 864-068
(5) For the No. 1 navigation unit, remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P18 Load Control Center - Left 1) VOR/LOC-1 2) GS-1 3) INSTR XFMR-1
S 864-069
(6) For the No. 2 navigation unit, remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P6 Load Control Center - Right 1) VOR/LOC-2 2) GS-2 3) INSTR XFMR-2
S 864-049
(7) Do this task to supply electrical power: (Ref 24-22-00/201). Manual Control
S 714-072
(8) Do a check of the navigation unit: (a) Set the mode-selector on the DFCS mode control panel to the HDG position. (b) For the No. 1 or the No. 2 navigation unit, set the VHF NAV transfer switch on the instrument switching module to the NORMAL position. (c) Tune the VOR/ILS navigation system to a local VOR station. 1) Listen for the local VOR station sound on the flight interphone (Ref 23-51-00/501).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 864-060
(9) If electrical power is not necessary, do this task to remove electrical power: Manual Control (AMM 24-22-00/201).
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A
737-300/400/500MAINTENANCE MANUAL
NAVIGATION UNIT - REMOVAL/INSTALLATION
______________________________________
1. General_______
A. This subject has two tasks. The first task is the removal of the navigation unit. The second task is the installation of the navigation unit and a test of the navigation unit.
TASK 34-31-42-004-068
2. Navigation Unit Removal_______________________
A. General
(1) The navigation units are installed in the electronics equipment rack. The No. 1 navigation unit (M154) and the No. 2 navigation unit (M155) are on shelf 4 of the E3 rack.
B. References
(1) 20-10-07/201, E/E Rack-Mounted Components
C. Access
(1)
Location Zone
205 Electronic Compartment
(2)
Access Panels
1201L Electronic Equipment Access Door
D. Procedure
S 864-032
(1) For the No. 1 navigation unit, open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P18 Load Control Center - Left
1) VHF NAV-1 VOR/ILS
2) INSTR XFMR-1
S 864-062
(2) For the No. 2 navigation unit, open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) P6 Load Control Center - Right
1) VHF NAV-2 VOR/ILS
2) INSTR XFMR-2
S 024-036
CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ NAVIGATION UNIT. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE FROM YOUR BODY CAN CAUSE DAMAGE TO THE NAVIGATION UNIT.
(3) Do this task to remove the applicable navigation unit: Remove the Rack-Mounted E/E Box (Ref 20-10-07/201).
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737-300/400/500MAINTENANCE MANUAL
S 034-038
(4) Install dust caps on the electrical connectors.
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