EFFECTIVITY
AF 101-116; IB 405; 799 Page 17/18
LH 001-010; AT ALL Aug 25/87
34-21-00
26V AC28V DC 6 DR297 VOR/ILS1 DR306 DC DR297 DN1245 A5STBY 180` BIASESS FLT DB231A C374 A45 POWERA37 B40 A SIGNALBUS C744COMPASSINST BUS C736
A44 40
34-41-00 B37 SUPPLYB41ACCAPT 2-F/O 2 HSI 1CAPT FLT A43
39
CAPT 1-F/O 2 (P7)INST SW BDR306
C
RLY COMP
CAPT 1-F/O 1 3 A41 C25CKT B231 INSTR SW ACCESS DC VOR ILS/INS ANNA25 A3126V AC 21 A42 INTRPT MAG/TRUE ANNBOX (P73)NC B25ESS FLT
B48 DB194E
XB26INST BUS C735 C1B31A26 YVOR C26 B32C54 ZXS606 CAPT CMPS SW (P1)RMI 1 53B1 B33C6XY A126V AC 34-41-00 XB5 NC B34YB1ZFLT INST 2 B194 AFC 1 ACCESS A5Y B28B6 X ZC1106 A1 B5XBUS BOX (E1-4) ZC1 A6B29 RSYMAGNETIC HEADINGVOR RMI 1 A5 B6YNO. 2 C5 B30ZDB103BALT A6 C39ZDB103B A39C6X26V AC 34-41-00 B39XH 39 B1742 HDGYSTBY BUS Y
TX3 40
DB420B INS H'C B34
3
CC733 43 Z Z5 X SIN41 B35 XAC R297 CAPT VOR/ILS INS A28HDG SYNC A17X1 1 9 Y COSC17 Y RLY (P73)2EXCIT 1 A34 A29 RSXX Y11 C34 ZC Z C'A3514 A30ZYY B420 AFC 3 ACCESSC35
TX4 10
H DB144BX BOX (E1-6)13AC ZZ HSI VALID -B1512 54 A37Y26V AC B16 HDG VALID +X 55 A36ZHESS FLT 48 B32 X HDG VALID -51 A15Y B39X DC
TX5 49
INST BUS C15 YC 180` BIAS SIGNALA1652 B144 CIWSYC576 Z CC16 AZ505 A32AC COMPUTER (E1-1)ZHDG SYNC X2C32 B14GB38EXCIT 2 A38DB103C 3 DB182D DB182DMAG HDG C38 CTYG55 X X B15B39 33-11-00VALID FLAG 67
27 C39
A39 1 YY
CDX28 Z
B103 MHR 1 CMPS CPLR (E1-1) 68L1655 B1626V AC Z ZB27 3828V DCCAPT 1-F/O 2 CMPS 76A27FLT INST HEADINGC27 RADIO MODE GNDRLY POSN LT (P1) BBUS 32
CDX
C732 0 03NO. 2 MAG HDGHDG SYNC
N124 CAPT HSI (P1) EXCIT 3
R306 CAPT CMPS RLY (P73)DB104B X
DB104B
73
H
X Y1 DN132A34-31-00 744 2 ZHY DR307
TX2 2
P7 PANEL-OVERHEAD 18
C 802DR3075 CC38Z G CRS-1 7CIRCUIT BREAKER 3 A38AC
DC
3SHEET B381 1 G 34-31-00 AC2 XX 5 33-11-00
30
34-31-00 Y Y
C
1 B182 A/P-F/D MODE SEL H
33
TX1 29
HDGL1654 CAPT 2-F/O 2 PNL (P10)A4032 ZZ X31 CMPS RLY POSN LT (P1)C40 1AC X 48 Y HDGH NC B40 2RS51
SHEET 5 Y Z FLAGC TX5 49 C39 352 A39Z 50 B39 + HDG 36AC C17 -VALID 37A17 SHEET DCMAG HDG C34
DB104C A34 5 DB578EVALID FLAG C35
55 N132 CAPT VOR RDDMI (P1)A35 R34-21-01 B17 4
XB34
DN164 B35
1B104 MHR 2 CMPS CPLR (E1-1) -Y DC 3721 + HDG VALID HDGZ 3631 C & H, X & Y INTENTIONALLY REVERSED H
FLAG TO PROVIDE CORRECT INDICATION
R307 F/O CMPS RLY (P73) 10 CB578 FLT DATA ACQ 24 X2 ON AF 152-156,172,173,191-199; UNIT 1 (E3-5) 34-31-00 23YGN ALL; MD ALL; VM ALL TX926V AC Z4 DR306 83 SIGNAL TO AFC 3 ACCESS BOX NOT USED ON
HDG AF 152-156,172,173,191-99; GN ALL; 60 41 14 B60 C42 60 41 14 INST BUS C1120 B25
DB179B DB180
DB181B ESS FLT
X1 1
MD ALL; VM ALL YADF RMI 2 DR306 2RS 26V AC ZON LH ALL EXCEPT 001-003; A25 34 FLT INST C25POWERED FROM 26V AC STBY BUS HBUS 2 C1122 ADF 18
2 3 C5 ON LH 014,015,063 FLT DATA ACQ UNIT RMI 2 ALT
7
POWERED FROM C733 HDG SYNC EXCIT 1
AC
B179 A/P-F/D A B180 A/P-F/D B B181 A/P-F/D C R306 CAPT CMPS
P7 PANEL-OVERHEAD
ROLL CMPTR (E1-4) ROLL CMPTR (E1-5) ROLL CMPTR (E1-6) RLY (P73) N164 F/O ADF RMI (P3)
CIRCUIT BREAKER
Magnetic Heading Reference System Schematic
Figure 4 (Sheet 3)
EFFECTIVITY
XA ALL EXCEPT AF 101-116,151; IB 405; SN 301,302; 799 Page 19/20 AT ALL Apr 25/93
34-21-00
28V DC
6 NO. 1 DR306 26V AC DN124
5
CKT
ESS FLT
B42 POWER
B44
DC DB231A STBY BUS
4
34-41-00
INTER-
INST BUS C736 CAPT ALT
C744
B43 40
B43 SUPPLY
AC
RUPT
CAPT FLT NORMAL
HSI 1
180` BIAS
B42
39
RADIO
3
B40 POWER A
INST SW RELAYS F/O ALT
DR306
SIGNAL
(P7) DR297
COMP(P7) ESS FLT 26V AC 2 1 SHEET 7&8 B41 B40 B231 INSTR SW ACCESS BOX (P73) DC NC A23 A24 AC B41 B SUPPLY C
26V AC FLT INST INST BUS (P7) RMI 1 C735 STBY BUS 26V AC (P7) EXCIT 1 C733 HDG SYNC BUS 2 26V AC ESS FLT INST BUS (P7) ALT RMI 1 C1106 (P7) EXCIT 2 C576 HDG SYNC (P7) EXCIT 3 HDG SYNC C732 C1120 ADF RMI 2 (P7) SHEET 7&8 RMI 2 (P7) C1122 ALT ADF BUS 2 26V AC FLT INST 26V AC ESS FLT INST BUS BUS 2 FLT INST 26V AC 2 3 48 39 13 C H X Z Y 12 10 11 Z Y X 41 40 H C DB103B 50 49Y X Z52 51 C H MAGNETIC HEADING 14 42 43 DB103B X Y Z 55 DB103CMAG HDG VALID FLAG B103 MHR 1 CMPS CPLR (E1-1) S606 CAPT CMPS XFR SW (P1) AC 5 4 H C DB104B TX2 3 2 1 Z Y X DB104B 1 1 MAG HDG 1 1 AC AC AC 55 DB104CMAG HDG VALID FLAG TX5 51 52 C H Y X Z TX1 33 32 H Y Z AC 49 48 50 31 29 30C X Z X Y (E1-1) B104 MHR 2 CMPS CPLR AC 34-21-04 TX4 TX3 TX5 R306 CAPT CMPS XFR (P73) Z X Y X Z Y X X Z Z X Y X Z Y Z X Y X Z Z Z X SHEET 7&8 NO. 2 DC B3 B2 B41 B4 B6 B5 Y Y A10 A12 A11 B2 B3 A37 NO. 2 A39 A38 Y B1 SHEET B40 B1 NC B10 B11 B12 RUPT INTER-CKT A10 A11 NO. 1 B42 7&8 Y R307 F/O CMPS RLY (P73) A12 A27 A15 A18 A13 A25 A16 A30 A36 A9 A3 A6 A1 A7 A4 A35 A29 A32 A28 A34 A8 A26 A2 A14 A17 A5 A33 A4 A5 A6 A31 A7 A9 A8 A1 A3 A2 DR307 DR307 G G G G COURSE 1 X Y Z A29 A28 A30 H' C C' H 33-11-00 CAPT 1-F/O 2 CMPS L1655 L1654 CAPT 2-F/O 2 CMPS RLY POSN LT (P1) RLY POSN LT (P1) 33-11-00 1 2 3 1 2 3 (E3-5) AIDS PROVISIONS 31-35-00 31-31-00 34 33 B128 FLT RECORDER DB128C AC 31 32 30 Z Y X DB128C D2653J C22 H 21D2653J X 18 19 20 Y Z 34-31-00 34-31-00 B182 A/P-F/D MODE SEL PNL (P10) A37 HDG VALID +A36 DC B39 HDG VALID -Y' X' 17 34 DC H C C 24 X Y 8 10 7 Z23 9 X1 36 Z Y 3 2 18 37 AC AC HEADING 0 03 180` BIAS SIGNAL Z X Y B14 B15 B16 RADIO MODE GND 28V DC 19 20 21 X 16 17 18 34-31-00 Z Y 29 27 28 43 DB195B B195 AFC 2 ACCESS BOX (E1-5) H 34-31-00 (E3-5) AIDS PROVISIONS DB426E 4 1 2 3 X Y Z HSI VALID -HDG VALID + HDG VALID -VOR ILS/INS ANN MAG/TRUE ANN A31 B48 B30 B28 B34 B32 B31 B33 B29 Z X Y X Y Z DB182D DB182D DR297 A22 34-41-00 INS B21 B17 B14 B11 B12 B15 B18 Y Y Z X Z 34-41-00 Y X Z B10 B13 B16 B20 (P73) R297 CAPT RAD/INS RLY CMPTR (E1-1) 55 54 B144 CTL INSTR WARN NC B19 7 6 6 4 C N124 CAPT HSI (P1) A C B DN132 DB144B INERT(A) CDX CDX RS RS CT CT TR TX RS
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