15V DC 15V DC
L
G OFFR
P
POWER TO
2400 PSI
VALID

PSM
CONTROL PL HYD SYS PRESS.(S7) YAW DMPR TEST
PSM
M10398(YE1) TEST PNL (P61)
RESET
WW

PANEL5V DCLIGHTS
OFF28V DC
OUTPUT
H
ON
3
STBY BUS C1560CSEU PWR SPLY 2L YAW DAMPER LEFT L YAWMD&T DAMPER (A18)
AA
P11-1 CB PNL ASSY A 1
IMPACT PRESS., AOA, TAS INOP
PRESSURE 2
ROLL RATE, ROLL ATT, YAW RATE,(S1) YAW DAMPER L
LAT ACCEL, GND SPEED

RETURN YAW DAMPERPNL (P5)
Yaw Damper Schematic
Figure 8 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH -122 YDM AND SUBSEQUENT  ú 22-21-00
 YDM DASH NUMBERS  ú ú 05 Page 27 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A43876
A
757
MAINTENANCE MANUAL

TO RUDDER PCA'S
INPUT
FILTER

FAULT
A/P TYPE

AIRPLANEA
ACCEL  TYPE
PUT FAULT
FAULTL
MONITOR AFT ACCEL

INPUT LOGIC CHANNEL
TO UPPER YAWPUT PFT CODE
DAMPER SERVO
YD CMD YD CMD LOGIC
GND TO AIR/
PUT ACCEL TEST AIR TO GND
CONTROL
FAULT

LIMITED H
YD CMD OUTPUT
VALUE
L
FILTER
ARINC + 10V DADC NO. OF CHANS EASY
429 RX INPUT
AUTHORITY ON/OFF B
MONITOR 1 CHANGE
FILTER
ARINC

PFT IN
AUTHOR-
PUT IN
CONTROL CONTROL HYD PWR
PROGRESS
429 RX
ITY
PROGRESS
POSITION
CENTER 2
LAW AND VALUE LIM-PRE-FLT
FEEDBACK COORD
TURN
ITER POS
ARINC
TEST
429 RX

ACTUATOR
RESET
HNO. OF CHANS
FAULT SERVO LVDT
POSITION
28V DC
CTRESET (SH 1)
LOOP VOLTAGE DEMOD
L
IRU MONITOR MONITOR
HYD PRESS.
26V H
EXCITATION
INPUT NO VALID
ARINC C
RESET
26V L
MONITOR
FAULT
FAULT
DATA OR
429 RX MONITOR ALIGN
FAULT FAULT OR
PFT IN
ALIGN PRE-LVDT FAULT

PRO-ARINC

GRESS DISPLAY
FLT
429 RX TEST
YAW DAMPER SERVO28V DC (SH 1)
TEST (PFT)
PRE-FLT LOGIC YD ACT FAULT
IRU

ACT FAULT
TEST

BITEDISPLAY
ACCEL FAULTBITE
FAULT
PFT FAULT  DISPLAY
YD INOP AYD FAULT
HYD PRESS SW FAULT
A D
AND A/G FAULT
LATCH
INTERLOCKFAULT
FAULT
A/P TYPE
LOGIC PUT FAULT
YDM FAULT
RELAY
FAULT
IRU FAULTSGND TO AIR/
AUTO.
AIR TO GND

15V DC
DADC FAULTS
DISENGAGE
RELAY MON YAW DAMPER
AIR/GND ON GNDMONITOR
RESET FAULT ENABLE
E
28V DC PUT PUT IN
(SH 1)
5V DC TEST GRESS
YD TEST CHANNEL
ACCEL PRO-
F (SH 1)
FAULT G
FAULT
NO VALID
SW MON

HYD. PRESS
DATA OR RESET
HYD PRESS.
ALIGN
PUT
STIMULUS YD
PWR UP POWER
TO PUT (SH 1) UP TEST
INOP A
L YAW DAMPER FAULT
SYSTEM (PUT)
15 S
MEANS LAST

LOGIC PFT IN
L IRUDISPLAY
1 S

FLIGHT LEG
PROGRESS
FAULT
ENABLE
CLEAR FAULTS &

PRESS TO YD CMD
YAW DAMPER
START INTERNAL

YD CMD
REVIEW EACH COINCI-MAINT
ON GND
TEST (10 SECS) FAULT DENCE
FAULT FAULT
IRU
EICAS CMPTR
FAULTS PRESS & HOLD

TO CLEAR LAST LEG RESET DISPLAYPRESS FOR
FAULT
2 SECONDS
MICRO-
OR
PRESS RESET

DISPLAY BUTTON & TO RE-WIND
RESET ALL PROCESSOR
DISPLAY
ALIGN
MONITORS AND MONITOR
3
FAULT LOGIC
4 S
CONTROL .P YD CMD AIDS
MONITOR .P (INPUTS SAME AS CONTROL .P)
MAN.

POWER
RESET

RECYCLE
SOLENOID ENGAGEH
MANUAL ENGAGE
28V DC OPPOSITEDIGITAL FLIGHT DATA
YDM
YD DISENGAGE
ACQUISITION UNIT
4
3DADC FAULT, AIR/GND FAULT,LVDT FAULT, HYD PRESS. FAULTYAW DAMPER 15V DC
3 4 GUN 051,102-999
Yaw Damper Schematic
Figure 8 (Sheet 4)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
　
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