DME-1 DME-2
HHB
0 GONIOMETER
TEST LOOP
15 MHZ
F FD
BALANCED BANDPASSFIRST SECOND 3.6 MHZ
CRYSTAL
EE E
RF
MODULATOR FILTER MIXER MIXER FILTER
TEST
FILTER
1ST
IF
INDICATOR
AAA 1
FREQ
TEST
D37MIXER
BB H
VOR 1
SYNTHESIZER
17XDD F
BAND
D61 34YLOGIC
X
ADF POINTER
2ND
19 CCG
15X19V
PHASE
Y
HORIZ
IF
20 30Y
26V AC
Z DC
MODULATION
90 HZ 21 55
POSITION MON
YZ
DETECTOR X
OSC CIRCUIT
LOOP ANT
CKT "B" LOOP
54
15 MHZ
TX K1
XMIT CABLE
AGC
OSC
X M32 LOOP M152
16
CH
AMPLITUDE 18
Y ANTENNA QUADRANTAL
C TR
H
RF SERVO
Z (STA 560 BOTTOM) ERROR CORRECTOR D65 SENSE
MODULATION AUDIO 32
17 26V AC
ADF 1 E
PHASE DETECTOR
33
AMPL SERVO DETECTOR 31
SERVO LOSS OF
SENSE
C
SIGNAL RF
DISABLE = 1 SIG = 1 N6 CAPTAIN'S RDDMI (P1)
LEVEL TUNING
A
DETECTOR
B 28V DCTRIAXIAL
AUDIO TONE
MUTING
CABLE GEN 34-21-00
M30 SENSE
D39
ANTENNA
1020 54 HZ
M34 SENSE 32
(STA 727
SAME AS N6LBL 45)
31
COUPLER CAPTAIN'S RDDMI
ADF TEST ACTUATE 30
TEST
(STA 727 LBL 45)
1533 1
SWITCH N7 F/O'S RDDMI (P3)S1
D2433A
28V DC
J14 ADF-1 ONC60
D2433B
DC
POWER F14 ZADF 1 DC
E14 Y ADF-1 BRGM28
SUPPLY D14 X D15 H
26V AC EXCIT115V AC
ADF-1 NCNC
E15 C RCVR
2636 84328 1637 22 3233343513143031 9101112 27 152324
C1126
(E2-4) D61
M1321 EFSG-R (E2-3)
ADF 1 AC
B
P18 CIRCUIT BREAKER D69
K L JAj _aC_t_sf_g_h_npq_rXYZ_m_iF TU
D2431A
PANEL _ ___J14 ADF-1 ON
OFF
NC D2431B
ANT
GAIN F14 Z
ADF
1000 A B C D A B C D A B C D E14 Y ADF-1 BRG
TEST
KHZ0.5D14 X
KHZ 100 KHZ10 KHZ1 KHZ
OFF OFF
T347 HV D69
D15 H LV H
ANT ANT
26V AC EXCIT
E15 C EXCIT
ADF-1
ADF ADF
26V AC
GND
TEST
A XFMR (STA 295
M1319 EFSG-L (E2-3)
A
26V AC
ANT ADF
WL 165, RBL 20)
OFF
1 OFFTEST
2
FROM B
ANT
D71AUDIO FLT INPH SYS
1 GAIN
ADF
2W P8 PANEL TEST
1
1200.5
1650.5
(23-51-00)D69
TONE
12
LIGHTING
ADF-2 P
F
ANT ADF
W
CONTROL RCVR
WOFF TEST
TONE
5V AC
GAIN
2
1 TEST INDICATIONS ARE
(33-11-00)
W
W
RDDMI POINTER TO 315 | 5 DEGREES1. (RELATIVE TO LUBBER LINE)
M
ADF CONTROL PANEL (P8) 2. 1020 HZ AUDIO TONE OUTPUT
45 DEGREE GONIO METER INDICATION3. ON RECEIVER FRONT PANEL
ADF System Schematic
Figure 3 (Sheet 1)
ADF
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH EFIS ú
34-57-01
ú ú 03 Page 6 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
34-21-00
1 LOOP
"A"
GG C
DME-1 DME-2
HHB
0 GONIOMETER
TEST LOOP
15 MHZ
F FD
BALANCEDBANDPASSFIRST SECOND3.6 MHZ
CRYSTAL
RF MODULATOR FILTERMIXER MIXER FILTER TEST
EE E
FILTER 1STIF INDICATOR
AAA 1
FREQ
TESTD39
BB H
VOR 2MIXER
SYNTHESIZER
11X DD F
BAND
D63 25Y
X
ADF POINTER 2ND
13X 19V
19 CC G
LOGIC
PHASE
Y
IF
HORIZ20 29Y
Z
26V AC MODULATION
90 HZ 21 39
POSITION MON
DC
YZ
DETECTOR X
OSC CIRCUIT
LOOP ANT
CKT "B" LOOP
40
15 MHZ
TX 27
XMIT CABLE AGC
OSC
XM33LOOP M153
C H
K1 AMPLITUDE18
Y ANTENNA QUADRANTAL
C TR
H
RFSERVO
Z (STA 600 BOTTOM) ERROR CORRECTOR D67 SENSE
MODULATIONAUDIO 12
17 26V AC ADF 2
PHASEDETECTOR 26
AMPL
E
SERVO DETECTOR28
SERVO
LOSS OF SIG=1DISABLE=1
SENSE
C
SIGNALRF
N7 F/O RDDMI (P3)
LEVELTUNING
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