23-31-00
 ON THE E2-1 SHELF  ú ú 14 Page 6 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
Passenger Address System Simplified Schematic
Figure 2 (Sheet 1)

A51632
A 737-300/400/500MAINTENANCE MANUAL
TEST SWITCH
BAT. BUS

28V DC (CAL, POSITION
C82
24-58-21 SPRING-LOADED)
PASS ADDRESS F (SHT 4)
AMPL BAT EXTERNAL SENSITIVITYD147CONTROL
P6-1 CIRCUIT BREAKER PANEL15MASTER3 db GAIN ON DECOMPN16D600132 NC
LEVEL
EXTERNAL GAIN CONTROLMIC LO
MIC HI
3
1
PTT

CONTROL
4MASTER SIDE TONE
1D121
22
VOLTAGE
DC COMM
LEVEL PA SIDETONE TO
8 FILT
DC
REGULATOR D121AUDIO ACESS UNIT
PA MIC 7 12(AUDIO SELECTOR
(PROVISIONS) P8 PILOTS CONTROL
M69 AUDIO ACCESS ORSTAND - AFT
PANELS)
20M1353 REMOTE ELECT.
INPUT NO 11
2 UNIT (E2-1)
E(SHT 4) T251CCONTROL 1
28V DC 14
231
2523 NC M73 FWD LEFT
INPUT NO 4 -1DB +1DB LAV SPKR
REMOTE ELECT.
(SHT 4)
UNIT (E2-1)

ODB=
26 22
OUTPUT MAIN T251A
OF 60 AUDIO 2
WATTS
D6003
OUTPUT
MIC LO

MIC HI
3DC
1PTT
4
DC COMM

1
2M67 AFT LEFT
CONTROL 4
PA MIC (SHT 4)28
LAV SPKRB
CONTROL 2
P13 FORWARD ATTD (SHT 4) A6
(SHT 4) T251B
PANEL INPUT NO. 2 4
251
D6005
MIC HI
D147
3 (SHT 3) D147
MIC LO NO SMOKINGLO
AFT RIGHT
4
10
DC COMM

PTT 33-25-11 SEAT BELTS LO
1  C8LAV SPKR
PASS/LAV CALLHI
HI
PA MIC

2 33-27-11 7
ATT CALLHI/LO
13NC
23-42-01 9
LO
AUX
CHIME
P14 AFT ATTENDANT 17HI ACTIV
HI
AMP
GEN
PANEL
18
79-34-11

NORM PSU SPEAKER
D752TEST CAL (TYPICAL)
1 D
2014 NC
HI/LO ACTIV
P
78-00-00 (SHT 4)
21
78-34-11

2D2501A
D2501A
H5

F5
3
6DB INCREASEK2
WHEN GROUND
S124 ENGINE 1 LOW

D121
REMOVED
OIL PRESSURE SW

FLIGHT GROUND SWITCH
K313
FF2
D752

G2
SAME AS

1 J5
S124 3 K5
2
M1353 REMOTE ELECT.M63 PASSENGER ADDRESS AMPLIFIER (E2-1) (346D-2B AMP)

S124 ENGINE 2 LOW UNIT
OIL PRESSURE SW
Passenger Address System Simplified Schematic
Figure 2 (Sheet 2)

OUTPUT LEVELINDICATORS (db)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH A WALL MOUNTED ú

 23-31-00
 TAPE REPRODUCER  ú ú 15 Page 7 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A51535
A 737-300/400/500MAINTENANCE MANUAL
D123
2

1A
115V ACRIGHT
ELEX BUS 2 3 LOCAL
C80 LEFT
24-00-01
 REVPLAYBACK
REPRODUCER-
TAPE RIGHT
LOWREWINDVOLTAGELEFT
ACREMOTE
FWD MOTOR
CUTOFF CAPSTAN MOTOR
AND
28V DC
TAPE BREAK
ACTUATOR SOLENOID
ACTUATOR
ELEX BUS 2 A1
C81REVERSING SWITCHING
SENSOR CONTROL
24-00-01 TAPEHEAD SWITCHING
1
REPRODUCER DC
P6-1 CIRCUIT BREAKER PANEL 666 HZ
28V DCPREAMP TENSION400 HZ
SWITCHES POWERSUPPLY5 RELAY CONTROL MODULE
CONTOUR VOLUME
12
13
CONTROL
ADJUSTMENTS14
UNDER FRONT
COVER
FORWARD
OFF  ON
D121 MUSIC
D123 PICKUPS
8 2530
9 NC
27AUDIO
10  26
INPUT 4CONTROL
VOLREVERSE VOLUME BASS TREBLE
29 (SHT 1)EQUALIZER
VOLUME
REMOTE

28
COMPENSATOR27
P13  FORWARD ATTENDANTSSELECT
PANEL - FORWARDNC

PREAMPLIFIER
WINDSCREEN

26
CONTROL28
M64 TAPE REPRODUCER (E2-1)
4(SHT 1)14 D125A T337 2
M63 PASSENGERM157 FWD
ADDRESSATTDAMPLIFIERSPEAKER
T338 (E2-1) D12
D125A 3
M1212  L AFTATTDSPEAKERC16
T339 24
M1213 R AFT(SHT 1)
ATTDSPEAKERB5 ATT FWD MUTE FWD MUTE
　
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