Comparator Unit Threshold Chart
Figure 2
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
ACCESS UNIT
Instrument Comparator System Block Diagram Figure 3
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
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A 737-300/400/500MAINTENANCE MANUAL
PWR MON
MOND237
R PWR
DC D237 D535 COMPARATOR POWERB2POWER SUPPLY
POWERA4 8A MONITORMONITOR POWERA3MON PWR SUPPLY OUTPUT T
1
B1
26V AC DC
B16
26V AC OUTPUT
B17
HDG
COMMON B18
DC
A
HDG
COSB19
HEADING
4 SEC
H1
B11 7A
COMPASS
ERROR SINB211=NORMOUTPUT T
SIGNAL C LEVEL DET B8
COMB20
PUSH TODIM B23
ROLL (X-Y)LEVEL
5
MODIFIERB22
A
ADJ
BANK
H
LEVEL
1
ROLL
DC
SINB31AADJ
A
ROLL
LEVEL DET
C
ERRORCOMB30
SIGNAL
2
2 SEC ROLLB131 A
1=NORM
COS B29
OUTPUT T
NC B28
PITCH
H
LEVEL
SINB37
A
DC
ADJ
A
PITCHPITCH
ERRORCOMB36
1=NORM
LEVEL DET
C 3
2 SEC
B12 3A
PITCH
SIGNAL COS B35
OUTPUT T
R
DC
S2 LOC
B40
1 B41VHF-1LDIFFLEVEL DET
DC DC
LOC
A
LOC DEV
R
A55SUM ADJ 6
2 SEC
B156A
VHF-2L
LOCOUTPUT T
A56G/S
VHF-1B4810 SEC G/S
28V DC ILS4
VHF-2A46B14 2A
5 A
DC
9 1
VHF-1B43
G/S SUPERFLAG 7 10
VHF-2 A43
2 SEC
8
GS B3 13
UPOUTPUT T
B52ALT
1=NORM
B53
VHF-1DNDIFFLEVEL DETALTM
1
G/S DEV
A
4
LEVEL
UPDC A A15
A52SUM ADJ INSTR
VHF-2 DN D1036 D1036
A53COMPR
14 2 SEC
ALT
B55
OUTPUT T
1=NORM
R/A110 11
11
RADIO
2
B56DIFFLEVEL DET TEST
TEST
ALTITUDE
P1-5
A49SUM LEVELB6
3
R/A2
N80 CAPT'S INST3 COMP ANNUNCIATOR
ADJ
A50COMPARATOR
RADIO ALTB45(P1)
12
TEST RELAYA
TRIP DISCRETEA35 65
A27 13 APPROACH TRIGGER 11
NC A28
R33 MSTR TEST RELAY64
(33-11-00)M156 COMPARATOR MONITOR UNIT (E3-4)
36 63D235A 28V DC
D235A 1 2 3 C412BATT BUS
TO F/O INST COMP ON AIRPLANES PRIOR TOON AIRPLANES AFTER
ANNUNCIATOR PANEL INCORP OF SB 34-1197 INCORP SB 34-1197 INSTR XFR
M160 FLT INSTRACCESS UNIT (E1-2) P18-2 CB PANEL
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