(b)
Set the HF frequency display to a different HF frequency.
NOTE: When the HF communication system first tunes to a
____ different HF frequency, the HF antenna coupler is in the HOME position. The HOME position helps prevent internal damage when you move the component.
(c) Set the mode select switch on the HF communication control panel to the OFF position.
S 864-031
(4)
Remove the electrical power if it is not necessary (AMM 24-22-00/201).
S 864-002
(5)
Open the applicable circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P18 Circuit Breaker Panel
1) C839, HF-1 AC
2) C346, HF-1 DC
(b)
P6 Circuit Breaker Panel
1) C857, HF-2 AC (if installed)
2) C477, HF-2 DC
S 014-003
WARNING: MAKE SURE THE POWER FOR THE HF SYSTEM IS OFF BEFORE YOU OPEN
_______ THE ACCESS PANEL. ELECTRICAL SHOCKS AND INJURY TO PERSONS CAN OCCUR.
(6) Remove the applicable access panel on the leading edge of the vertical stabilizer (AMM 12-31-51/201).
NOTE: The HF-1 antenna coupler is installed on the left side of
____ the vertical stabilizer. The HF-2 antenna coupler, (if installed), is on the right side of the vertical stabilizer.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 034-004
(7) Do these steps at the front of the HF antenna coupler.
(a)
Remove the cable connector from jack J1.
(b)
Remove the coaxial cable connector from jack J2.
D. HF Antenna Coupler Removal
S 024-017
CAUTION:_______MOVE THE HF ANTENNA COUPLER CAREFULLY. SET THE COMPONENT ON ITS BOTTOM. DO NOT SET THE COMPONENT ON ITS END (WITH THE HANDLE UP). INTERNAL PARTS ARE EASILY DAMAGED.
(1) Remove the applicable HF antenna coupler (AMM 20-10-07/201).
TASK 23-11-61-404-034
3. HF Antenna Coupler Installation (Fig. 401)_______________________________
A. References
(1)
AMM 12-31-51/201, Fin and Rudder Access Doors and Panels.
(2)
AMM 20-10-07/201, Electrical/Electronic Black Box
(3)
AIPC 23-11-61-01, Illustrated Parts Catalog
(4)
AMM 23-51-00/501, Flight Interphone System
(5)
AMM 24-22-00/201, Electrical Power - Manual Control
B. Access
(1)
Location Zone
706 Vertical Stabilizer
(2)
Access Panel
9572 Access Door Leading Edge - Left
9573 Access Door Leading Edge - Right
C. Prepare for the HF Antenna Coupler Installation
S 864-007
(1) Make sure the applicable circuit breakers are open:
(a)
P18 Circuit Breaker Panel
1) C839, HF-1 AC
2) C346, HF-1 DC
(b)
P6 Circuit Breaker Panel
1) C857, HF-2 AC (if installed)
2) C477, HF-2 DC
S 424-018
CAUTION:_______MOVE THE HF ANTENNA COUPLER CAREFULLY. SET THE COMPONENT ON ITS BOTTOM. DO NOT SET THE COMPONENT ON ITS END (WITH THE HANDLE UP). INTERNAL PARTS ARE EASILY DAMAGED.
(2)
Install the HF antenna coupler (AMM 20-10-07/201).
S 434-009
(3)
At the front panel of the HF antenna coupler, do these steps:
(a) Install the cable connector on the jack J1.
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