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757 MAINTENANCE MANUAL
S 015-114
(2)
Open the access door, 119BL, for the passenger address amplifier (AMM 06-41-00/201).
S 865-005
(3)
On the P11 overhead circuit breaker panel, make sure these circuit breakers are closed:
(a) 11C22, PASS ADRS AMPL
S 865-122
(4) GUN 001-007; Make sure this circuit breaker on the right miscellaneous electrical equipment panel, P37, is closed:
(a) 37E2, TAPE RPDR
E. AIRPLANES WITH COLLINS PA AMPLIFIERS; Passenger Address Amplifier Test
S 745-232
(1) Do these steps at the front panel of the amplifier.
(a)
Set the function select switch to TONE. 1) Make sure a tone comes from the PA speakers.
(b)
Momentarily set the function select switch to LOAD. 1) Make sure the front panel shows a minimum of 30 OHMS.
(c)
Set and hold the function select switch to LEVEL. 1) Make sure the front panel shows 69.0 to 71.0 VRMS.
(d)
Set the function select switch to OPERATE.
F. AIRPLANES WITH PED PA AMPLIFIERS; Passenger Address Amplifier Test
S 715-020
(1) For a Pacific Electro Dynamics PA Amplifier, do these steps at the front panel of the amplifier.
(a) Set and hold the AMP TEST/NORMAL/SPKR TEST switch to the AMP TEST position. 1) Make sure the front panel shows 0 +1 dB.
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757 MAINTENANCE MANUAL
(b)
Set the AMP TEST/NORMAL/SPKR TEST switch to the SPKR position. 1) Make sure the OVERLOAD light does not come on. 2) Make sure there is a high chime tone from the PA speakers.
(c)
Set the AMP TEST/NORMAL/SPKR TEST switch to the NORMAL position.
G. Boarding Music Test (WITH RACK-MOUNT TAPE REPRODUCER)
S 715-023
(1) Do these steps at forward attendant panel, P21, to do a test of the volume control:
(a)
Slowly turn MUSIC control from the OFF position to the HI position. 1) Make sure the boarding music is clear and the sound
increases.
(b)
Set the MUSIC control to the usual level of sound.
H. Chimes Test
S 715-041
(1) Do these steps on overhead panel, P5, to do a test of the chime operation:
(a)
Set the FASTEN SEAT BELT switch from the OFF position to the ON position. 1) Make sure you hear a low chime sound from the PA speakers.
(b)
Set the FASTEN SEAT BELT switch from the ON position to the OFF position. 1) Make sure you hear a low chime sound from the PA speakers.
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757 MAINTENANCE MANUAL
I. Voice Annunciations Test (with override and mute)
NOTE: There must be no feedback with the PA announcements.
____
S 865-042
(1)
Continue the boarding music operation.
S 715-043
(2)
Test of the Attendant PA override.
(a) Do these steps with the forward attendant handset: 1) Push the PA switch. 2) Push the PTT switch.
a) Make sure the boarding music stops without much of a click.
3) Speak into the handset microphone. a) Make sure you hear clear voice in the passenger cabin. b) Make sure no sound comes from the speakers adjacent to
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