(g)  
The Microphones

 (h)  
The Chimes

 B. References
 (1)  
AMM 06-41-00/201, Fuselage (Major Zones 100 and 200) Access Doors and Panels

 (2)  
AMM 23-42-00/501, Cabin Interphone

 (3)  
AMM 23-51-00/501, Flight Interphone

 (4)  
AMM 24-22-00/201, Electrical Power - Control

 (5)  
AMM 36-00-00/201, Pneumatic Power - Apply and Remove

 (6)  
AMM 71-00-00/201, Power Plant

 C. Equipment
 (1)  
Random noise generator - 543-1
 Pacific Electro Dynamics
 11465 Willows Rd. N.E.
 Redmond, WA 98052

 (2)  
Sound Level Meter - Quest Electronics 2400-10 (or equivalent) Rice Safety Equipmemt Co. In. Seattle, Washington

 (3)  
Prerecorded announcement test tape - one set.

 (4)  
Boarding music tapes - one set.

 D. Access
 (1)  
Location Zones
 119/120 Main Equipment Center (RH side)
 200 Upper Half of the Fuselage

 (2)  
Access Panel
 119BL Main Equipment Center

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E.

F.
G.
757 MAINTENANCE MANUALPrepare for the System Test S 865-060
 (1)  Supply electrical power (AMM 24-22-00/201).
 (2)  S 015-116Open the access door, 119BL, for the passenger address amplifier (AMM 06-41-00/201).
 (3)  S 865-063On the P11 overhead circuit breaker panel, make sure these circuit breakers are closed: (a) 11C22, PASS ADRS AMPL
 (4)  S 865-185On the P37 circuit breaker panel, make sure these circuit breakers are closed: (a) 37E2, TAPE RPDR

AIRPLANES WITH COLLINS PA AMPLIFIERS; Passenger Address Amplifier Test
 S 745-233
 (1)  
For a Collins PA Amplifier, 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.AIRPLANES WITH PED PA AMPLIFIERS; Passenger Address Amplifier Test

 S 735-108

 (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 a high chime sound is heard in all PA speakers.

 (c)  
Set the AMP TEST/NORMAL/SPKR TEST switch to the NORMAL position.

 H. Speaker Sound Level Test
 S 735-072
 (1)  
At the captains or first officers sidewall, connect a random noise generator to the hand microphone jack.

 S 865-073

 (2)
On the noise generator set the PWR/PTT switch to the ON position.

 S 865-074

 (3)  
At the applicable audio selector panel on the P8 panel (Capt or F/O), push the PA microphone selector switch.

 S 865-075

 (4)  
Set the sound level meter to the SLOW and "C" positions.

 S 735-076

 (5)  
Use the sound level meter to do a check on each speaker:

 (a)  
Slowly move the sound level meter across the speaker panel.
　
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