B. Procedure
S 864-002
(1) Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11G8, HF COMM LEFT
(b)
11G34, HF COMM RIGHT (if installed)
S 024-026
CAUTION: CLEARLY IDENTIFY THE CONNECTOR FOR THE PANEL POSITION
_______ (LEFT OR RIGHT) DURING REPLACEMENT. THERE IS A CROSS-CONNECTION POSSIBILITY DURING INSTALLATION.
(2) Do these steps to remove the HF communication control panel:
(a)
Loosen the four quarter-turn fasteners.
(b)
Lift the HF communication control panel to get access to the electrical connector.
(c)
Disconnect the electrical connector.
(d)
Put protective covers on the electrical connector.
TASK 23-11-02-404-035
3. Install the HF Communication Control Panel
__________________________________________
A. References
(1)
AMM 23-51-00/501, Flight Interphone System
(2)
AMM 24-22-00/201, Electrical Power - Manual Control
B. Access
(1) Location Zones
211/212 Flight Compartment
C. Procedure
S 864-036
(1) Make sure these circuit breakers are open on the overhead circuit breaker panel, P11:
(a) 11G8, HF COMM LEFT
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757 MAINTENANCE MANUAL
(b) 11G34, HF COMM RIGHT (if installed)
S 424-028
CAUTION: CLEARLY IDENTIFY THE CONNECTOR FOR THE PANEL POSITION
_______
(LEFT OR RIGHT) DURING REPLACEMENT. THERE IS A
CROSS-CONNECTION POSSIBILITY DURING INSTALLATION.
(2) Do these steps to install the HF communication control panel:
(a)
Remove the protective covers from the electrical connector.
(b)
Examine the electrical connector for bent or broken pins, dirt, and damage.
(c)
Connect the electrical connector.
(d)
Put the HF communication control panel into its position on the pilots overhead panel, P5.
(e)
Tighten the four quarter-turn fasteners.
S 864-007
(3) Remove the DO-NOT-CLOSE tag and close the circuit breaker on the P11 panel for the HF communication control panel that you installed:
(a)
11G8, HF COMM LEFT
(b)
11G34, HF COMM RIGHT (if installed)
S 864-029
(4) Make sure that the circuit breaker for the other panel (if
installed) is open.
NOTE: You will close one circuit breaker at a time to do a check
____
for a cross-connection.
D. Installation Test - HF Communication Control Panel.
S 864-009
WARNING: DO NOT OPERATE THE HF COMMUNICATIONS SYSTEM WHILE FUEL IS PUT
_______ INTO THE AIRPLANE. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
WARNING: MAKE SURE PERSONNEL STAY A MINIMUM OF 6 FEET AWAY FROM THE
_______ VERTICAL STABILIZER WHEN THE HF SYSTEM TRANSMITS. RF ENERGY FROM THE HF COMMUNICATION ANTENNA CAN CAUSE INJURIES TO PERSONNEL.
(1)
Do not operate the HF system while fuel is put into the airplane.
(2)
Supply electrical power (AMM 24-22-00/201).
S 864-030
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MAINTENANCE MANUAL
S 714-031
(3) Use the new HF communication control panel to set the applicable HF
communication system to a test frequency.
S 864-010
(4) Make sure the captain's audio selector panel operates (AMM
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