(b)
11G29, INTERPHONE CAPT FLT AMPL or 11G29, INTERPHONE FLT AMPL ASP 1 DUAL PWR
S 864-006
(2) For the F/O and the observer audio selector panels, open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a) 11C26, INTERPHONE F/O OBS or 11C26, INTERPHONE FLT AMPL ASP 2 DUAL PWR
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757 MAINTENANCE MANUAL
(b) 11G30, INTERPHONE F/O OBS or 11G30, INTERPHONE FLT AMPL ASP 2 R PWR
S 014-011
(3) For the first observer's audio selector panel, pull out the oxygen mask stowage-box to get access to the connectors behind the audio selector panel.
(a) Do not disconnect the box from the structure.
S 914-012
CAUTION: DO NOT TOUCH THE AUDIO SELECTOR PANEL BEFORE YOU DO THE
_______ PROCEDURE FOR DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE AUDIO SELECTOR PANEL.
(4)
Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-01/201).
S 024-013
(5)
Remove the audio selector panel.
TASK 23-51-01-404-014
3. Install Audio Selector Panel____________________________
A. General
(1) This task gives the instructions to install the audio selector panel in the flight compartment.
B. References
(1)
AMM 20-41-01/201, Electrostatic Sensitive Discharge Devices -Maintenance Practices
(2)
AMM 24-22-00/201, Electrical Power - Control
C. Access
(1) Location Zones
(a) 211/212 Flight Compartment - sect 41
D. Procedure
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S 914-015
CAUTION:_______ DO NOT TOUCH THE AUDIO SELECTOR PANEL BEFORE YOU DO THE
PROCEDURE FOR DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC
DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE
AUDIO SELECTOR PANEL.
(1)
Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-01/201).
S 424-016
(2)
Install the audio selector panel.
S 414-017
(3)
For the first observer's audio selector panel, install the oxygen mask stowage-box.
S 864-019
(4)
For the captain's audio selector panel, remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11C25, INTERPHONE CAPT FLT AMPL
(b)
11G29, INTERPHONE CAPT FLT AMPL
S 864-022
(5) For the F/O and the observer audio selector panels, remove DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11C26, INTERPHONE F/O OBS or 11C26, INTERPHONE FLT AMPL ASP 2 DUAL PWR
(b)
11G30, INTERPHONE F/O OBS or 11G30, INTERPHONE FLT AMPL ASP 2 R PWR
S 714-027
(6)
Audio Selector Panel Installation Test
S 864-028
(7)
Supply electrical power (AMM 24-22-00/201).
(a)
Push the passenger address (PA) microphone select switch on the audio selector panel. 1) Make sure that the light in the switch comes on.
(b)
Make a PA announcement.
1) Make sure that you hear clear audio through the passenger address speakers.
S 864-029
(8) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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