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B767
Electrical / Instrument Book 18
Chapter (ATA reference)
PSS B767-200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PSS B767-300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FLIGHT DATA RECORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIRCRAFT INTEGRATED DATA SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . AIRPLANE CONDITION MONITORING SYSTEM . . . . . . . . . . . . . . . . . . . . CLOCKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PITOT STATIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STANDBY ATTITUDE REFERENCE SYSTEM. . . . . . . . . . . . . . . . . . . . . . . STANDBY COMPASS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIR DATA COMPUTER SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIR DATA INSTRUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ALTITUDE ALERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29 August 2002
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page2
TRAININGNOT
ES
FOREWORD
UNCONTROLLEDCOPY
THESENOTESARE
INTENDEDFORINSTRUCTIONALPURPOSE
SONLY
ANDNOREVISION
SERVICEWILLBEPROVIDEDTOTHEHOLD
ER
Thisdocumentisissuedontheexpressconditionthatanypartorallofitscontentsshallnotbywayoftradeor
otherwise,
belent,re-sold,hiredou
torotherwisecirculated
toanyotherpartyand/o
rCompanywithoutprior
written
permission
ofQANTASAirwaysLtd.
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PSS B767-200
Table of Contents
Subchapter
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSTEM PRINCIPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page4
INTENTIONALLY
BLANK
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INTRODUCTION
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Passenger Service System (PSS)
The PSS provides passenger control of the reading lights and an
attendant call for passenger service at each seat location.
The following pages describe the system as applicable to the
B767-238.
23.34 PSS B767-200 INTRODUCTION
M00
PASSENGER SERVICE SYSTEM INTRODUCTION
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General
The Passenger Service System on the B767-200 aircraft consists of
two zones, forward and aft.
The heart of the system in each zone is a Column Timer Decoder
(CTD). The CTD serves as the interface unit between the Seat
Electronics Box (SEB) and the Passenger Service Unit Decoder
(PSUD). It also has the clock that provides the timing for the system.
There is one PSUD for each seat overhead location and a SEB for
each seat group.
Terminators are located at the end of each SEB and PSUD column to
assist system timing and bidirectional data flow.
The forward attendants panel (P21) allows control of the PSS system
in normal operation and also provides testing facilities.
23.34 PSS B767-200 INTRODUCTION
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PASSENGER SERVICE SYSTEM
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COLUMN TIMERDECODER
PASSENGER SERVICEUNIT DECODER
MASTER CALLLIGHT (BLUE) CHIME UNIT
FWD ATTENDANTS PANEL(P21)
FWD
OFF
P A S S E NT &S E RV ICE S Y S
NORMALMASTER
TEST
LAMPTEST
ENT
TEST
DA TA DIRCALL
LTSAFT
OFF
ON
FWD
AFT
ON
CABIN
LO HI
READINGNORMAL
ONOFF
LIGHTS
PASS ENT
S Y ST P WR
PASS SERV
S Y ST P WRBRD MUSIC
VOLUME
ENTERTAINMENT
CHANNELSELECT
1
2 3
4
FWD MSTR
CA L L RE S E T
MAIN DOOR
UP
MAIN DOORDOWN
62333AHA
W
W
ENTRY-L
ENTRY-R
ON ANNCMT
ANNOUNCEMENT
READY
1
R SV2
R SV1
4
321
2
5
6
NEXT
78
1
STARTCANCLCONT
3
5
8 9
PWR
6
2
0
MAINTENANCEANDTEST ONLY
AFT MSTR
CALL RESET
GROUND
SERVICE BUS
EMERG LIGHTS
POWER
ON
POWERON
SEATSOVHD
ATTEND-L A TTEND- R L E FT E NTRY
CEILING
EMER LTG
CALL ANDSERVICE
HI OFF
5
PASSENGER CONTROL UNITSEAT ELECTRONIC
BOX
.
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PASSENGER SERVICE SYSTEM
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COMPONENT LOCATIONS
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Flight Deck
The following circuit breaker is located on the P11-3 circuit breaker
panel:
PASS ENTMT/SERVICE CONT at position T8.
Main Equipment Centre
Circuit Breakers - located on P36 PASS ENTERTAINMENT PSUD:
R FWD - position J1
R AFT - position J2
L FWD - position J3
L AFT - position J4
Circuit Breakers - located on P37 PASS ENTERTAINMENT PSUD:
C FWD - position K3
C AFT - position K4
Circuit Breakers - located on P37 PASSENGER ENTERTAINMENT
CTD:
FWD - position K1
AFT - position K2Located in P33:
FWD and AFT PSS Power relays.
Located above and forward of the E2 Rack:
FWD and AFT Column Timerespectively).
23.34 PSS B767-200 COMPONENT LOCATIONS
M00
FLIGHT DECK AND EQUIPMENT CENTRE
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(LOOKING DOWN)
MOUNTED ABOVE & ADJACENT TO
E2 RACK IN MAIN EQUIPMENT CENTER
BEAMSFLOOR
POWER RELAYS
BREAKERS PES/PSS CIRCUIT
EQUIP PANEL, P33FWD MISC ELECTRICAL
EQUIP PANEL, P37
RIGHT MISC ELECTRICAL
MAIN EQUIPMENT C
CEIOF
A
FWD COLUMNTIMER DECODER
AFT COLUMNTIME DECODER
CIRCUIT BREAKER PANEL (P11-3)
PASS ENTMT/SERVICE CONT (T8)
FLIGHT DECK
.
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FLIGHT DECK AND EQUIPMENT CENTRE
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Main Deck
Fwd Attendants Panel (P21) - Forward main entry door.
Seat Electronic Boxes - one per seat group. Passenger Control Unit - one on each seat (on a seat arm).
Master Call Light Assemblies.
Attendant Row Call Light - one on each PSU.
Seat-to-seat cable routing - raceway next to seat tracks.
SEB termination plugs - at the end of each column.
Ceiling Area
Passenger Service Unit Decoders - above each seat group.
Chime Units - location of the 5 chime units as shown. PSUD-to-PSUD cable routing.
PSUD termination plugs.
23.34 PSS B767-200 COMPONENT LOCATIONS
M00
PASSENGER CABIN AREA
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page16
INTENTIONALLY
BLANK
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INTERFACE
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AC Power
The 115 volt ac right bus powers the Column Timer Decorders
(CTDs) which in turn supplies 35 volts ac to the Seat ElectronicBoxes (SEBs).
The 115 volt ac left utility bus provides power for the right and left
Passenger Service Unit Decoders (PSUDs).
The right utility bus powers the centre PSUDs.
DC Power
The 28 volt dc left bus provides the power to activate the relaysassociated with PES/PSS and also provides DC power to the CTDs.
Power Control
The PASS SERV SYS PWR switch/light on the forward attendants
panel (P21) is used to control the fwd and aft PSS power relays. This
switch/light illuminates white when actuated to the on position. The
power relays distribute 115v AC to the CTDs and PSUDs.
23.34 PSS B767-200 INTERFACE
M00
PSS POWER
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General
The passenger service system is made up of two zones; forward and
aft. Each zone has a Column Timer Decoder (CTD), PassengerService Unit Decoders (PSUD), Seat Electronics Boxes (SEB),
Passenger Control Units (PCU) and master call lights. PSS controls
can be found on the left forward attendants panel (P21). Each zone
has right, center, and left columns with the seats connected from
forward to aft in each column.
Each CTD acts as the interface unit between three identical columns
of PSUDs and SEBs. Each PSUD controls reading lights (one per
passenger seat) and an attendant call (row call) light (one per seat
group). Each SEB receives inputs from either two or three PCUs.
The aft zone centre column has three PCUs while all other columnshave two PCUs. Each zone has master call lights for both the left
side and the right side of the zone service areas. Chime outputs
provide input to the associated electronic chime unit to alert the
attendant to passenger calls.
Forward Attendants Panel PSS Controls
READING Switch
The READING switch gives the attendant control of all readinglights in the airplane. The three positions are ON, OFF and
NORMAL. OFF is a momentary position.
PASS ENT and SERVICE
This switch allows the attendant
entire airplane. Test will be discu
MSTR CALL RESET Switc
The switch is a momentary swit
pushed. Pushing a MSTR CALL
master call lights and all PSUD
extinguish. The FWD MSTR CA
FWD zone. The AFT MSTR CA
aft zone.
The light will illuminate for a pa
Operation
Attendant Call Function
Each passenger calls an attendan
button on their passenger contro
call light and the appropriate ma
may be turned off by pushing th
switch on the forward attendantbe reset by pushing the attendan
to call.
In each CTD column circuit ther
chime and a single call light. Th
circuit with three seats per row i
23.34 PSS B767-200 INTERFACE
M00
PSS SIGNAL FLOW
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R MSTR
CALL LT
CALL LT
DATA 1
DATA 1
DATA 1
DATA 1
DATA 1
DATA 1
DATA 2
DATA 2
DATA 2
DATA 2
DATA 2
DATA 2
R
RSEB
LSEB
L
PSUD
SEBC
C
PSUD
MSTR CALL
RESET
TEST
RDG LT OFF
RDG LT ON
R CHIME
L MSTR
L CHIME
RDG LT ON
RDG LT OFF
RESET
MSTR CALL
TEST
FORWARD ZONE CTD
L CHIME
R CHIME
L,C, & RPSUD &
SEB DATA
PSUD
AFT ZONE CTD
TO AFT L COL
PSUDS
TO AFT L COLPSUDS
SEBS
TO AFT R COL
TO AFT R COL
SEBS
ZONE
PSUDS
& SEBS
FIRS
FORWARD
PANEL (P21)
ATTENDANTS
FIRS
L MSTR
R MSTR
CALL LT
CALL LT
TO FWD
AFT ZONE CENTRECOLUMN ONLY
L & SERVI
CALL RESET
AFT MSTR
CALL RESET
FWD MSTR
LI
NORMAL
READING
ONOFF
OFF
EST ONLYPASS ENT &
SERVICE SYS
LTS
CALL
DATA DIR
TEST
LAMP
TEST
NORMALENT
TESTMASTER
OFF AFT
FWD
ONAFT
FWD
ON
1
.
2 DEACTIVATED FOR
ATTENDANT CALL
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PSS SIGNAL FLOW
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Attendant Call Function (Continued)outputs for both left and right chimes and call lights. The left and
center seats will initiate a left chime/call and the right seat will
initiate a right chime/call. As a unit, each CTD can generate both leftand right chime and call light signals.
In the forward zone, left and center column seats will sound the
FWD L chime and turn on the FWD (galley) and FWD L (ailse)
master call lights. The right column seats will sound the FWD CTR
chime and turn on the FWD (galley) and FWD R (ailse) master call
lights.
In the aft zone, left column seats and center column seats 1 and 2
will sound the AFT L chime and turn on the MID L (attendants
station), OVERWING L exit sign light assembly and AFT L (aisle)master call lights. Center column seat 3 and the right column seats
will sound the AFT R chime and turn on the MID R (attendants
station), OVERWING R exit sign light assembly and AFT R (aisle)
master call lights.
Reading Light Function
When the forward attendants panel READING switch is in the
NORMAL position, control of the reading lights remains with the
PCUs. Subsequent pushes of a PCU reading light switch will turn on
and turn off the corresponding reading light. Placing the READINGswitch in the ON position will turn on all reading lights in the
passenger cabin. The lights will remain on as long as desired.
Placing the READING switch in the OFF position will turn off all
lights.
23.34 PSS B767-200 INTERFACE
M00
PSS SIGNAL FLOW(Continued)
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R MSTR
CALL LT
CALL LT
DATA 1
DATA 1
DATA 1
DATA 1
DATA 1
DATA 1
DATA 2
DATA 2
DATA 2
DATA 2
DATA 2
DATA 2
R
RSEB
LSEB
L
PSUD
SEBC
C
PSUD
MSTR CALL
RESET
TEST
RDG LT OFF
RDG LT ON
R CHIME
L MSTR
L CHIME
RDG LT ON
RDG LT OFF
RESET
MSTR CALL
TEST
FORWARD ZONE CTD
L CHIME
R CHIME
L,C, & RPSUD &
SEB DATA
PSUD
AFT ZONE CTD
TO AFT L COL
PSUDS
TO AFT L COLPSUDS
SEBS
TO AFT R COL
TO AFT R COL
SEBS
ZONE
PSUDS
& SEBS
FIRS
FORWARD
PANEL (P21)
ATTENDANTS
FIRS
L MSTR
R MSTR
CALL LT
CALL LT
TO FWD
AFT ZONE CENTRECOLUMN ONLY
L & SERVI
CALL RESET
AFT MSTR
CALL RESET
FWD MSTR
LI
NORMAL
READING
ONOFF
OFF
EST ONLYPASS ENT &
SERVICE SYS
LTS
CALL
DATA DIR
TEST
LAMP
TEST
NORMALENT
TESTMASTER
OFF AFT
FWD
ONAFT
FWD
ON
1
.
2 DEACTIVATED FOR
ATTENDANT CALL
g62334aw PSS SIGNAL FLOW
(Continued)
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General
The CTD creates the system timing and interfaces with PSUDs and
SEBs to transfer data from the SEBs to the PSUDs. It also interfaceswith the Forward Attendants Panel (P21). It works as an encoder and
decoder, encoding commands from the attendant panel to the PSUDs
and SEBs, and decoding commands from the SEBs to the attendant
master call lights and the chime units.
When the reading light switch on the Passenger Control Unit (PCU)
is pushed, the SEB puts the proper code, at the proper time on the
data stream to the CTD. The SEBs and PSUDs are paired to a
particular seat group and are interfaced to each other by the CTD.
The same data flow is true for the attendant call function. When the
call switch is pushed, a command is sent to the CTD via the SEBand on to the PSUD. The PSUD commands the appropriate attendant
row call light to illuminate and the CTD causes the chime to sound
and the relevant master call light to come on.
Signal Flow
Clock data (C/D) 1 and 2 are the timing and control signal lines for
SEBs and PSUDs. Each CTD provides 3 pairs of C/D 1 and 2 lines;
one pair to each left, centre and right columns of SEBs and PSUDs.
Each third of the CTD has parallel outputs to attendants master call
lights and the hi-tone chime.
The CTD also provides an ac su
and PES functions. The PSUDs
400 Hz, through PSS power rela
from the CTDs, the PSS POWEfunction.
23.34 PSS B767-200 INTERFACE
M00
ZONE SIGNAL FLOW
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PASS SERV UNIT
(TYPICAL)
LIGHTS
READING
LIGHTS
CALL
CLOCK/DATA 1
CLOCK/DATA 2
CLOCK/DATA 1
CLOCK/DATA 2
CLOCK/DATA 2
CLOCK/DATA 1
SEB
CLOCK/DATA 1
CLOCK/DATA 2
CLOCK/DATA 1
CLOCK/DATA 2
LOGIC
POWER
SUPPLY
LOGIC
POWER
SUPPLY
LEFT PSUD
ELECTRONICS BOX
POWER
SUPPLY
SEB
CLOCK/DATA 1
CLOCK/DATA 2
35V AC
35V AC
CHIMES
MASTER
CALL
LIGHTS
ATTENDANT
PANEL
FIRST CENTER SEAT
FIRST CENTER PSUD
FIRST LEFT SEAT
ELECTRONICS BOX
FIRST
PWR
PWR
PWR
PWR PWR
PWRPWR
PWRPWR
FIRST RIGHT SEB
PSUD
PSUD
SEB
FIRST RIGHT PSUD
COLUMN TIMER DECODER
PSUD
115V AC
115V AC
115V AC
35V AC
L
E
FT
C
O
LUM
N
C
EN
TR
E
C
O
LU
M
N
R
IGH
T
CO
LU
MN
.
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ZONE SIGNAL FLOW
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page26
INTENTIONALLY
BLANK
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COMPONENT DESCRIPTION
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Component Features
The CTD is 5.04 x 7.48 x 1.97 inches (12.80 x 19.00 x 5.00 cm)
excluding connectors. The finish is yellow alodine and the unitweight is 2.87 pounds (nominal). There are three multi-pin
connectors on the front and four connectors on the rear.
System Interface
J1, J2, and J7 respectively interface with the right, left and center
PSUDs. J3, J4, and J6 respectively interface with the left, right, and
center SEBs. J5 interfaces with the attendants panel, chimes, call
lights, and input power.
Operation
The column timer decoders provide the basic PSS timing required to
keep the PSU decoders synchronous with their associated seat
electronic box. PSS commands are processed from the PCUs in the
three independant columns (left, center and right) and forward
attendants panel. The unit contains two power supplies, one for the
unit itself and one for the seat electronic boxes.
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
COLUMN TIMER DECODER
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180 DEGREESFOR CLARITY
ROTATED
J1(R)J2(L)
FOR CLARITY
J7(C)
HOLD DOWFOOT (4 PLA
UNIT INVERTED
.
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COLUMN TIMER DECODER
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Location
The Seat Electronics Boxes (SEBs) are mounted under the seat
groups on a diagonal crossbrace using four nylatch fasteners. TheSEBs are protected by a plastic cover which is secured with similar
fasteners over the top of the SEB.
CAUTION
Care should be taken to ensure all nylon fasteners are
secured due to the seat itself providing heat sinking for the
SEB. Failure to do so may cause overheating of the SEB
with subsequent
phantom
chimes/lights throughout thecabin.
Component Features
The Seat Electronics Box contains circuits for the Passenger
Entertainment System (PES) and the Passenger Services System
(PSS).
The PSS circuits are the seat coders, timing counters and logic gates
which assign a unique sampling period for each PCU. Each SEB isinterrogated at fixed intervals to check if any call or reading lights
switching has been requested by a passenger since the last
interrogation.
The Seat Electronics Box has th
interface with other units. Two c
and the third connector (J3) is o
Each SEB can handle up to four
Seat Electronics Box Int
The SEB interfaces with the;
J1 - CTD via a floor or wall
J2 - next SEB or terminator.
J3 - PCUs.
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
SEAT ELECTRONICS BOX
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CONNECTOR
GROUND
J3 TO PCU
J2
TERMINATION
LAST SEAT BOXSEAT TRACK
BOX CABLE
ELECTRONIC
INTER SEAT
J1
2.3"
(2 PLACES)
FASTENERS
NYLATCH
.
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SEAT ELECTRONICS BOX
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General
These units are located above each seat group inside the ceiling
panels and they provide control of the reading lights and attendantrow call light for each seat row.
The PSUD is used in all zones. It decodes commands received to
control the reading and row call lights for a seat group.
NOTE: Inboard 4 seat PSUDs are physically not interchangeablewith outboard 3 seat units.
Operation
The PSUD accepts timing and data information from the column
timer decoder and its associated seat electronic box. It provides
power to the reading lights and attendant row call lights. There are
three cable connections on the front of the unit. The PSUDs in a
column are series connected by loop-to-loop cables connecting the
two larger connectors on the end of the unit. The connectors are
interchangeable. The smaller connector provides interface with the
reading and row call lights. A termination plug is connected to the
last PSUD in a column. This plug contains a jumper for returning
clock and data information via the loop-to-loop cables, to the CTD.
The first PSUD in a column is connected to the CTD.
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
PASSENGER SERVICE UNIT DECODER
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J3
J2
J1
SIDE
PSUD TERM
END
.
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PASSENGER SERVICE UNIT DECODER
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General Description
The Passenger Control Unit (PCU) is an analog device which does
not require any power supply for its operation. PSS outputcommands are encoded by the Seat Electronic Box (SEB).
PCU Location
The PCU is located on the seat arm of each seat.
PSS Functions
The following facilities are provided by the PCU;
Reading Light Switch
The Reading Light Switch is a momentary slide switch which
provides push-on push-off light control.
Attendant Call Switch
The Attendant Call Switch is a momentary slide switch. Pushing this
switch causes the overhead white row call light to illuminate, a
hi-chime to sound once, and a blue master call light to illuminate.
Pushing the switch while the row call light is on resets the overhead
call light.
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
PASSENGER CONTROL UNIT
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TOPVIEW
.
READING LIGHT
SWITCH
ATTENDANT CALL
SWITCH
5
SEAT HARNESSCONNECTION
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PASSENGER CONTROL UNIT
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Purpose
The Electronic Chime Unit generates a musical chime signal in
response to various system inputs.
Features
The unit operates off 28 volts dc and creates either a LO, HI, or
HI/LO chime. There are four different sources of input for the chime
unit:
Cabin Interphone (HI/LO)
Passenger Service (HI)
Lavatory call (HI) Passenger signs systems (LO)
The cabin interphone input originates from the Audio Accessory
Unit, the PSS from the CTD, the Lavatory call from relays and the
Passenger signs from the Passenger Signs Module.
NOTE: The MID chime unit has been disconnected for PSS calls.
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
ELECTRONIC CHIME UNIT
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ELECTRONIC CHIME UNIT
.
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ELECTRONIC CHIME UNIT
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General
This panel is located above the attendants seat adjacent to the main
entry door. The following switches provide for control and test of thePES/ PSS.
PASS ENT SYST
PASS ENT SYST PWR on-off switch controls power to the PES.
PASS SERV SYST
PASS SERV SYST PWR on-off switch controls power to the PSS.
READING
READING light control switch provides reading light control. In the
NORM position, the passengers have individual control. The ON and
OFF positions override this control.
FWD MSTR CALL
FWD MSTR CALL RESET is used to reset fwd attendant and
master call lights and also used as a test indicator.
AFT MSTR CALL
AFT MSTR CALL RESET is used to reset aft attendant and master
call lights and also used as a test indicator.
PASS ENT and SERVISWITCH
The switch is used to send test cBITE. Test responses are indica
CALL RESET lights. Also, the c
This switch is left in the NORM
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
FORWARD ATTENDANTS PANEL - PSS CONTRO
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FWD
OFF
NORMALMASTER
TEST
LAMPTEST
ENTTEST
DATA DIRCALLLTS
AFT
OFF
ON
FWD
AFT
ON
CABIN
LO HI
READINGNORMAL
ONOFF
LIGHTS
PASS ENTSYST PWRBRD MUSIC
VOLUME
ENTER TAINMENTCHANNELSELECT
12 3
4
W
W
ENTRY-L
ENTRY-R
MAINTENANCE AND TEST ONLY
GROUND
SERVICE BUS
EMERG LIGHTS
POWER
ON
POWER
ON
SEATSOVHD
ATTEND-L ATTEND-R
HI OFF
.
PASS ENT &
SERVICE SYS
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FORWARD ATTENDANTS PANEL - PSS CONTROLS
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Master Call Lights
The master call lights are blue and are mounted in the ceiling in
either three lamp or five lamp assemblies, or in exit light assembliesmounted adjacent to service/entry doors and emergency exits.
First class (if configured) and business class each have the three
lamp ceiling assemblies located forward over each aisle.
The aft section has one three lamp assembly over each aisle forward
of the aft galley.
Row Call Lights
When an attendant call is made from a seat, a white row call light
illuminates on the PSU above that seat group.
23.34 PSS B767-200 COMPONENT DESCRIPTION
M00
ATTENDANT CALL LIGHTS
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5-LAMP CEILING ASSEMBLY
EXIT LIGHT ASSEMBLY
3-LAMP CEILING ASSEMBLY
(AMBER)
LAV LIGHT
MASTER ATTENDANT
MASTER
ATTENDANT
MASTER CALL LIGHT
UP
CEILING
CALL LIGHT (PINK)CALL LIGHT (BLUE)
UP
CALL LIGHT (BLUE)(AMBER)LAV LIGHT
CALL LIGHT (PINK)
COLORED LENS
LAMP ASSEMBLY
(BLUE)
.
MOOX
DECODER
PASSENGER SERVICE U
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ATTENDANT CALL LIGHTS
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page42
INTENTIONALLY
BLANK
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SYSTEM PRINCIPLES
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Operation
The following text details the operation of a PSS data command
request.
Frame
The Column Timer Decoders deliver timing and sync pulses to three
columns of Seat Electronic Boxes, and Passenger Service Unit
Decoders. The CTDs provide individual timing pulses to all units
simultaneously. This allows for correct synchronization and control.
One frame contains 31 seat group time slots plus a frame sync time
slot. The sync time slot is required to obtain and maintain PSS
timing synchronization. Regardless of cabin configuration, the CTDwill still count 31 frames to maintain sync.
Seat Group Time Slot
Each seat group time slot is divided into four bit times (D0, D1, D2,
D3). Seat groups are capable of handling up to four seats within the
group.
When a passenger in a 2 seat group selects left READ light on, a
logic zero is generated in the PSCU. In the SEB, it is converted into
a four bit code data pulse, in this case, 0011. The data pulse is sentto the CTDs and PSUDs to turn on the left READ light. If the
passenger pushes the READ light switch again, the SEB will now
output the four bit code 0010 to turn off the light.
NOTE: There is a bit code forseats (left, center left,
attendant call function
Seats 1 and 2 attendan
to form the left attend
the right attendant call
23.34 PSS B767-200 SYSTEM PRINCIPLES
M00
PSS DATA COMMANDS
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DATA COMMANDS
NOT USED
NOT USED
READLIGHT - LEFT - "OFF"
READLIGHT - LEFT - "ON"
READLIGHT - CENTER LEFT - "OFF
READLIGHT - CENTER LEFT - "ON"
READLIGHT - CENTER RIGHT - "OF
READLIGHT - CENTER RIGHT - "ON
ATTENDANT CALL - LEFT - "RESET
ATTENDANT CALL - LEFT - "ON"
ATTENDANT CALL - RIGHT - "ON"
NOT USED
NOT USED
D0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
READLIGHT - RIGHT - "OFF"
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ATTENDANT CALL - RIGHT - "RESE
FRAME SYNC
NORMAL SYNC
25.5
D2 D3D1D0
FS 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 FS 2
SEAT GROUP
DATA COMMAND SLOTS TYPICAL SEAT
GROUP TIME SLOT
mSEC
1 FRAME 119.315 mSEC START NEXT FRAME
1
1 1
READLIGHT - RIGHT - "ON"
1
DATA FLOW
(3.016 mSEC)
SEAT 1 AND 2 (LEFT & LEFT CENTER)
ACTIVATE THE LEFT ATTENDANT CALL
FUNCTION WHILE SEATS 3 & 4
(RIGHT & RIGHT CENTER) (WHEN IN-
STALLED) ACTIVATE THE RIGHT
ATTENDANT CALL FUNCTION
0.364mSEC
CLOCK DATA
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PSS DATA COMMANDS
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Introduction
This diagram shows the method of transmitting data from the loop of
SEBs to the loop of PSUDs through the CTD.
General
The CTD generates a sync pulse followed by 124 clock pulses (31
seat groups x 4 bit times) for each frame. During one frame e.g. odd,
these pulses are transmitted to the SEBs on data line 1 and during
the next frame (even) data line 2 is used. The PSUDs have the same
arrangement but receive signals on the opposite data line to which
the SEB is transmitting on (for example, if the SEB transmits data to
CTD on DATA-1 line then the CTD transmits to PSUD on DATA-2line.)
Operation
The passenger service system (PSS) provides a means of
multiplexing and programming control signals to enable passengers
to individually control their reading light and to call a cabin
attendant. The column timer decoder (CTD) is the heart of the PSS.
It interfaces with three columns of seat groups with a maximum of
31 seat groups per column.
Data Flow
The SEBs and PSUDs receive
and apply them, through sync anshown), to the next SEB and PS
During the sync time, data is loa
SEBs.
At the same time, data is being
PSUDs. The data in the PSUD
a previous frame.
After generating sync, the micro
4-bit shift register, and each clo
As the command bits are shiftedreplaced by zero bits from the C
in a series loop, all SEBs act as
shifting direction is toward DAT
DATA-2 in the even frame. In o
one switch command (4-bit code
necessary to send up to six diffe
The SEB microcomputer determ
commands on a last come, first s
accept any commands until it se
commands in succession. To allcommand for six successive odd
from the SEB loop to the CTD o
is shifted from the CTD to the P
DATA-2) on a last-in, first-out b
frames, all the SEB data has bee
triple coincidence, the next sync
23.34 PSS B767-200 SYSTEM PRINCIPLES
M00
PSS DATA TRANSMISSION
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2SEBSEB 1
2PSUD1PSUD
HGFEDCBA
P P
HGFEB DCA
CTD
C/D 2
C/D 1I/O
C/D 2
C/D 1I/O
4321
DCBA
4321
XXXXXXDCBA
CLOCK S
SYNC RE
CLOCK S
SYNC LOIN SEBS -
CLOCK/SYNC
CLOCK/SYNC
PSUD 1
31PROCESSOR
MICRO-
SEB 1
31IN PSUDS -
SEB BUFFER
PSUD BUFFER
.
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Data Flow (Continued)registers to be read and the appropriate lights to go on or off. This
technique prevents noise from being processed as a command since
the odds of a noise spike appearing in the same seat command slotthree times in succession are very low or almost non-existent.
Fault Tolerance
By alternately changing the direction of the timing signals it
generates, the CTD allows for normal system performance in the
event of an open connection between the CTD and either SEBs or
PSUDs.
Suppose there is a natural break between two SEBs in a column. By
feeding the timing signals first in the forward direction (out ofDATA-1 terminal), and then in the reverse direction (out of DATA-2
terminal), it can be seen that the break will appear non existent.
23.34 PSS B767-200 SYSTEM PRINCIPLES
M00
PSS DATA TRANSMISSION(Continued)
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2SEBSEB 1
2PSUD1PSUD
HGFEDCBA
P P
HGFEB DCA
CTD
C/D 2
C/D 1I/O
C/D 2
C/D 1I/O
4321
DCBA
4321
XXXXXXDCBA
CLOCK S
SYNC RE
CLOCK S
SYNC LOIN SEBS -
CLOCK/SYNC
CLOCK/SYNC
PSUD 1
31PROCESSOR
MICRO-
SEB 1
31IN PSUDS -
SEB BUFFER
PSUD BUFFER
.
g62334av PSS DATA TRANSMISSION
(Continued)
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page50
INTENTIONALLY
BLANK
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SCHEMATIC DIAGRAM
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Reading Light Function
A reading light on or off command from the PCU goes to the SEB
where it is multiplexed onto the SEB data loop controlled by theCTD. The CTD processes this command and applies it to the PSUD
data loop. The PSUD reacts to the command, turning the white
reading light on or off.
Attendant Call Function
An attendant call command goes to the SEB where it is multiplexed
onto the SEB data loop controlled by the CTD. The CTD processes
this command and applies it to the PSUD data loop. The PSUD
reacts by turning on the overhead attendant call light (white) in amanner similar to the reading light at the seat which issued the call.
The CTD also illuminates the attendant master call lights.
The attendant call is reset from the issuing seat in the same manner
as it was set or from the MSTR CALL RESET switch on the
attendants panel.
Column Timer Decoder
The CTD contains all the necessary circuitry to establish systemtiming to interface with the PSUDs and SEBs for up to three
columns of aircraft seat groups, and to interface with the Attendant
Panel. It also provides command to illuminate the Master Call Lights
for the right hand and left hand halves of the zone of the aircraft as
well as driving the chime units for the same.
Attendants Panel.
The attendants panel contains th
provides test signals to other unnormal position enables the CAL
LIGHT switch.
The CALL RESET switch reset
that zone, or enables individual
both zones.
23.34 PSS B767-200 SCHEMATIC DIAGRAM
M00
SYSTEM SCHEMATIC
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FWD COLUMN TIMER DECODER
COLUMN
RIGHT
PROCESSOR
R COL PSUD
RESET
RDG LT OFF
RDG LT ON
TEST MODE
TEST OK
DATA 2
DATA 1
SUPP
POWE
INTER
PSS D
SEAT ELECTRO
28V
TO/FROM
AND SEB
AC
35V
R COL
R COL
PASSENGER SERVICE UNIT DECODER
ATT
SEA
SEA
SEA
PROCESSOR
DATA I/OBUFFER
DATA 1
DATA 2
POWER
SUPPLY
AC RTN
27V -8V +5V
115VAC
FROM
PSUD
C/B
28V
R CALL
L CALL LT
TEST OK
SEBC COL
PSUD
AC
115V
SUPPLY
POWER
SEB I/O
BUFFER
DATA 2
DATA 1
BUFFER
PSUD I/O
DATA 2DATA 1
PROCESSOR
COLUMN
LEFT
C COL
L CHIME
R CHIME
PROCESSOR
COLUMN
CENTER
SEB
PSUD
C COL
TO/FROM
AND SEB
PSUD
CALL LIGHTS
TO MASTER
CHIME UNITS
TO ELECTRONIC
B
A
NORM
W W
FROM AFT CTD
P21 FORWARD ATTENDANTS PANEL
ON
OFF
TEST SWITCH
TEST OK = GND
FWD MSTR
CALL RESET
AFT MSTR
CALL RESET
28V
PASSENGER CONTROL UNIT
ON
CALL
RESETATTENDANT
CALL
READING
LIGHT
CTD
AFTTO
.
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SYSTEM SCHEMATIC
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page54
INTENTIONALLY
BLANK
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INSTALLATION
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General
This shows the SEB mounted on a diagonal brace on the underside
of the seat. Note the snap on cover.
NOTE: Ensure ALL fasteners are secured. Failure to do so maycause overheating of the SEB with subsequent phantom
chimes/lights throughout the cabin.
23.34 PSS B767-200 INSTALLATION
M00
SEAT ELECTRONICS BOX INSTALLATION
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TO PCU
MUX IN
NYLON FASTENERS
COVER
SEAT
.
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SEAT ELECTRONICS BOX INSTALLATION
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PSUD Access
PSUD access is obtained by releasing two latches in the oxygen
module/lights panel. The panel then swings down. A lanyard isprovided with hooks which may be used to hold the panel at
intermediate inclined or full vertical position.
23.34 PSS B767-200 INSTALLATION
M00
PASSENGER SERVICE UNIT DECODER INSTALLAT
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P
PSU
LIGHTS
READING
2O
LATCHES
MASK
.
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PASSENGER SERVICE UNIT DECODER INSTALLATION
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B767ELECTRICAL
/INSTRUMENT
BOOK
18Page60
INTENTIONALLY
BLANK
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TESTING
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General
Self-tests are initiated by the PASS ENT and SERVICE SYS switch
on the forward attendants panel. This switch has a NORMALposition and seven test positions. The MASTER TEST position tests
both the PES and PSS. The next five positions test the PSS only.
LAMP TEST checks all attendant row call lights, reading lights and
master call lights. The next four positions check the PSUD or SEB
clock data loops. The inner callouts (FWD, AFT, FWD, AFT)
indicate the direction data (DATA DIR) is sent down the loops. The
outer callouts (ON, OFF, ON, OFF) indicate the normal condition of
the attendant row call lights (CALL LTS) if the tests pass. The first
two positions check the PSUD loops (OVHD) while the next two
positions check the SEB loops (SEATS).
The last position of the test switch checks the PES only.
The FWD MSTR CALL RESET and AFT MSTR CALL RESET
lights will illuminate at the end of each test to indicate a satisfactory
test. Failure of one or both of the lights to illuminate indicates a
failed test. They are both press-to-test lights. The attendant call
chime tone will sound to indicate the completion of the first two
tests. If the MASTER TEST fails, then the other tests must be
performed in sequence.
Test Preparation
Verify that all PES and PSS circuit breakers are closed and the
Utility buses are powered.
On the forward attendant panel,
the PASS SERV SYS PWR swit
Set the READING switch and thswitch to NORMAL.
Press the FWD MSTR CALL RE
RESET switch/lights to test the
23.34 PSS B767-200 TESTING
M00
SELF TEST - ATTENDANT PANEL
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FWD
OFF
PASS ENT &SER VICE SYS
NORMALMASTER
TEST
LAMPTEST
ENTTEST
DATA DIRCALLLTS
AFT
OFF
ON
FWD
AFT
ON
CABIN
LO HI
READINGNORMAL
ONOFF
LIGHTS
PASS ENTSYST PWRBRD MUSIC
VOLUME
ENTER TAINMENTCHANNELSELECT
12 3
4
W
W
ENTRY-L
ENTRY-R
ON ANNCMT
ANNOUNCEMENT
READY
1
RSV 2
RSV 1
4
321
2
5
6
NEXT
78
1
STARTCANCLCONT
3
5
8 9
PWR
6
2
0
MAINTENANCE AND TEST ONLY GROUND
SERVICE BUS
EMERG LIGHTS
POWER
ON
POWER
ON
SEATSOVHD
ATTEND-L ATTEND-R
HI OFF
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SELF TEST - ATTENDANT PANEL
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General
This tests all the PSS units and data lines and the PES signal
transmission. The completion of this check is indicated by a chimesounding. A passed test is indicated by both MSTR CALL RESET
lights illuminating.
23.34 PSS B767-200 TESTING
M00
MASTER TEST
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FWD MSTRCALL RESET
AFT MSTR
CALL RESET
NORMAL
MASTER
LAMP
TEST
ENT
TEST
AFT
OFF
AFT
FWD
ON
OFF
CALLLTS
PASS ENT AND
OVHD
SERVICE SYST
SEATS
FWD
DATA DIR
ON
TEST
NOTE: IF THIS TEST PASSES THEN NO FURTHER TESTS ARE REQUIRED.
NOTE: CHIME SOUNDS TO INDICATE COMPLETION
P21
ILLUMINATED
TEST PASSED TEST
OF TEST, WHETHER THE TEST PASSES OR FAILS.
.
ILLUMINATED
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MASTER TEST
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General
This test checks all lamps for open circuits. The operator must walk
through the entire passenger cabin to check all lamps.
NOTE: The LAMP TEST position commands ALL reading, call andMaster call reset lights ON. The illumination of both MSTR
CALL RESET lamps does not necessarily confirm the
serviceability of the system.
23.34 PSS B767-200 TESTING
M00
LAMP TEST
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FWD MSTRCALL RESET
AFT MSTRCALL RESET
NOTE: CHIME SOUNDS TO INDICATE COMPLETION
ILLUMINATED
ILLUMINATED
2. REPLACE CTD IF COMPLETE COLUMN OR COLUMNS OF LIGHTS NOT ILLUMINATED
ALL MASTER CALL
LIGHTS ILLUMINATED
ALL ATTENDANT ROWCALL LIGHTS ILLUMINAT
ALL READING
LIGHTS ILLUMINATED
3. TURN SWITCH TO "NORMAL" THEN BACK TO "LAMP TEST" TO VERIFY FIX
1. REPLACE ANY INDIVIDUAL BULBS
OF TEST, WHETHER THE TEST PASSES OR FAILS
TEST PASSED TEST
CORRECTIVE ACTION
P21NORMAL
MASTER
LAMP
TEST
ENT
TEST
AFT
OFF
AFT
FWD
ON
OFF
CALLLTS
PASS ENT AND
OVHD
SERVICE SYST
SEATS
FWD
DATA DIR
ON
TEST
.
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LAMP TEST
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General
This test checks the PSUD data lines and PSUDs by the CTD
transmitting a signal in the forward direction. During this check, eachPSUD makes a reading light driver amplifier check. The master call
light on/off condition indicates if a fault is a line fault or a unit fault.
The effect in the cabin will be the call lights will illuminate in a
sequential fashion from the front of the zone to the aft. At the end of
the test, ALL cabin call lights and the Master Call Reset lights will
be illuminated.
NOTE: The reading lights will NOT illuminate during this test.
23.34 PSS B767-200 TESTING
M00
OVHD DATA DIR FWD TEST
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FWD MSTR
CALL RESET
AFT MSTRCALL RESET
CORRECTIVE ACTION
ILLUMINATED
ILLUMINATED
ALL MASTER CALL
1. IF MASTER CALL LIGHT ON, REPLACE PSUD AT FIRST OFF CALL LIGHT
2. IF MASTER CALL LIGHT OFF, REPLACE PSUD TO PSUD CABLE BETWEEN THE LAST ON CALL LIGHT AND FIRST OFF LIGHT
CTDPSUD PSUD PSUD
FROM FWD TO AF
ALL CALL LIGHTS
MOVING SWITCH TO "NORMAL" THEN BACK TO "OVHD DATA DIR FWD"
ON
1ST
ON
2ND
ON
3RD ...
LIGHTS OFF
ILLUMINATE SEQU
3. AFTER FAILURE HAS BEEN IDENTIFIED AND FIXED, VERIFY FIX BY
NORMAL
MASTER
LAMP
TEST
ENTTEST
AFT
OFF
AFT
FWD
ON
OFF
CALL
LTS
PASS ENT AND
OVHD
SERVICE SYST
SEATS
FWD
DATA DIR
ON
TEST
TEST PASSED TEST.
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OVHD DATA DIR FWD TEST
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General
This test is the same as the OVHD DATA DIR FWD test except the
CTD transmits a signal in the aft direction.
The effect in the cabin will be that all call lights will illuminate and
then will extinguish one at a time (in a sequential order) from the aft
to the front of the zone. At the completion of the test, ALL call
lights will be extinguished and the Master Call Reset lights will be
illuminated.
23.34 PSS B767-200 TESTING
M00
OVHD DATA DIR AFT TEST
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3. AFTER FAILURE HAS BEEN IDENTIFIED AND FIXED, VERIFY FIX BY
1. IF MASTER CALL LIGHT ON, REPLACE PSUD AT FIRST ON LIGHT
LIGHTS OFF
ALL MASTER CA
ILLUMINATE AT
AFT TO FWD
SEQUENTIALLY
TIME THEN GO O
1ST
OFFOFF
2ND
OFF
MOVING SWITCH TO "NORMAL" THEN BACK TO "OVHD DATA DIR AFT"
BETWEEN THE LAST OFF LIGHT AND FIRST ON LIGHT2. IF MASTER CALL LIGHT OFF, REPLACE PSUD TO PSUD CABLE
FROM AFT
ALL CALL LIGHT
PSUDPSUDPSUDCTD
ILLUMINATED
ILLUMINATED
TEST
ON
DATA DIR
FWD
SEATS
SERVICE SYST
OVHD
PASS ENT AND
LTS
CALL
OFF
ON
FWD
AFT
OFF
AFT
TEST
ENT
TEST
LAMP
MASTER
NORMAL
CALL RESET
AFT MSTR
CALL RESET
FWD MSTR
... 3RD
CORRECTIVE ACTION
TEST PASSED TEST
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OVHD DATA DIR AFT TEST
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General
This test checks the SEB data lines and SEBs by the CTD
transmitting a signal in the forward direction.
The effect in the cabin is that the call lights will illuminate in a
sequential fashion from the front of the zone to the aft. At the
completion of the test, ALL call lights and the Master Call Reset
lights will be illuminated.
23.34 PSS B767-200 TESTING
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SEATS DATA DIR FWD TEST
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SEBSEBSEB
MOVING SWITCH TO "NORMAL" THEN BACK TO "SEATS DATA DIR FWD"
THE LAST ON CALL LIGHT AND FIRST OFF CALL LIGHT2. IF MASTER CALL LIGHT OFF, REPLACE SEB TO SEB CABLE BETWEEN1. IF MASTER CALL LIGHT ON, REPLACE SEB AT FIRST OFF CALL LIGHT
LIGHTS O
3RDON
2NDON
1STON
ILLUMINATE SEALL CALL LIGH
FROM FWD TO
CTD
3. AFTER FAILURE HAS BEEN IDENTIFIED AND FIXED, VERIFY FIX BY
ALL MAST
ILLUMINATED
ILLUMINATED
CALL RESETAFT MSTR
CALL RESETFWD MSTR
TEST PASSED TEST
CORRECTIVE ACTION
NORMAL
MASTER
LAMP
TEST
ENT
TEST
AFT
OFF
AFT
FWD
ON
OFF
CALL
LTS
PASS ENT AND
OVHD
SERVICE SYST
SEATS
FWD
DATA DIR
ON
TEST
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General
This test checks the SEB data lines and SEBs by the CTD
transmitting a signal in the aft direction.
The effect in the cabin is that all call lights will illuminate and then
will be extinguished in a sequential fashion from the aft of the zone
to the front. At the completion of the test, ALL call lights will be
extinguished and the Master Call Reset lights will be illuminated.
23.34 PSS B767-200 TESTING
M00
SEATS DATA DIR AFT TEST
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ALL MAST
3. AFTER FAILURE HAS BEEN IDENTIFIED AND FIXED, VERYFY FIX BY
CTDALL CALL
2ND
LIGHTS O
2. IF MASTER CALL LIGHT OFF, REPLACE SEB TO SEB CABLE BETWEEN
SEB SEB SEB
OFF OFF OFF
3RD 1ST
THE LAST OFF LIGHT AND FIRST ON LIGHT
MOVING SWITCH TO NORMAL THEN BACK TO "SEATS DATA DIR AFT"
ILLUMINAT
TIME THE
SEQUENT
AFT TO FW
1. IF MASTER CALL LIGHT ON, REPLACE SEB AT FIRST ON CALL LIGHT FROM AFT
CORRECTIVE ACTION
TEST PASSED TEST
ILLUMINATED
ILLUMINATED
CALL RESETAFT MSTR
CALL RESETFWD MSTR
NORMAL
MASTER
LAMP
TEST
ENT
TEST
AFT
OFF
AFT
FWD
ON
OFF
CALL
LTS
PASS ENT AND
OVHD
SERVICE SYST
SEATS
FWD
DATA DIR
ON
TEST
.
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SEATS DATA DIR AFT TEST
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Troubleshooting With Terminators
A shorted coaxial cable can cause PES/PSS failures not identifiable
by the BITE. If there is a failure that the BITE does not removefollow the steps below:
Seat Fault
Make sure the SEB termination plug has the resistor and shorting
wire installed correctly and that the termination plug is correctly
attached to the SEB. If the problem continues, move the SEB
termination plug forward in the column until the failure is removed.
Replace the last SEB to SEB cable that you disconnected.
CAUTION
Remember to install the termination plug back at the last
SEB in the column.
Roof Fault
Make sure the PSUD termination plug has the shorting wire installed
correctly and that the termination plug is correctly attached to the
PSUD. If the problem continues, move the PSUD termination plugforward in the column until the failure is removed. Replace the last
cable that you disconnected.
CAUTION
Remember to install the terPSUD in the column.
Cable Short
Before you replace a Column Ti
open circuits between Pin 4 a(indicating blown fuses)
blown fuses in the CTD
If there is an internal fuse that hthe SEB-to-SEB wiring (short).
wiring in the applicable column
prevent blowing the fuses in the
23.34 PSS B767-200 TESTING
M00
FIM TROUBLESHOOTING
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PCU PCU PCU PCU
PASSENGER SERVICE UNIT DECODER
PASSENGER SERVICEUNIT GASPER AIR
OUTLETS
FROM PREVIOUS SEAT GROUP
LOCATED INSEAT TRACK
TO NEXTSEAT
FROM PREVIOUSSEAT GROUP
PSUD TERMIN
SEB T
.
OXYGENMASKS
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FIM TROUBLESHOOTING
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B767ELECTRICAL
/INSTRUMENT
BOOK
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PSS B767-300
Table of Contents
Subchapter
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INTERFACE DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSTEM PRINCIPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DISPLAYS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSTEM PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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B767ELECTRICAL
/INSTRUMENT
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INTRODUCTION
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Introduction
The following section pertains to the Passenger Service System
(PSS) fitted to the 767-338 aircraft only.
General
The Passenger Service System (PSS) on the 767-338 is used to
provide the passengers with reading light control, cabin attendent call
and information functions.
In Business Class, the PSS interfaces directly with the Matsushita
System 2000 In-Seat Video setup. There are some controllers in the
PSS which have been replaced and some which remain similar or thesame as the 767238.
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.
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Operation
The Cabin Management Terminal (CMT) is the interface unit for the
Cabin Attendant to control the system. The forward attendants panelis fully operable for the aft section of the aircraft, however for
Business Class, the CMT should be used.
Attendant call request information and reading light control is carried
out from the CMT. This information is routed via the Passenger
Entertainment System Controller (PESC). The PESC interfaces via
the Passenger Service System Controller (PSSC) to the Area Services
Box (ASB). The ASB replaces the Column Timer Decoder (CTD). It
outputs to the Passenger Service Unit Decoders (PSUDs), Chime
Units and Master Call lights. The last PSUD at the end of each
column is fitted with a PSUD Terminator.
The PESC also connects to the Area Distribution Box which transfers
the Data information to the seat network via each seat groups
Video/Audio Seat Electronics Box (VASEB). Requests and
information exchange to the passenger happens via their individual
Advanced Digital Passenger Control Units (ADPCUs). Similar to the
PSUDs, the last VASEB at the end of each column is fitted with a
VASEB Terminator.
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PASSENGER SERVICE SYSTEM - BUSINESS CLA
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VIDEO AUDELECTRON
AREADISTRIBUTION
BOXCABIN MANAGEMENT TERMINAL PASSENGER
ENTERTAINMENTSYSTEMCONTROLLER
PASSENGERSERVICE SYSTEMCONTROLLER
AREA SERVICEBOX
PASEDE
MASTER CALLLIGHT (BLUE) CHIME UNIT
FWD ATTENDANTS PANEL
GROUND
SERVICE BUS
EMERG LIGHTS
PASS ENT &
SERV SYSTEM
NORMAL
MASTER
TEST
LAMP
TEST
ENT
TEST
D AT A D IR
CALL
LTS
OVHD
AFT
OFF
ON
FWDFWD
AFT
ON
LO HI
READING
NORMAL
ONOFF
LIGHTS
PASSEN T
S Y S T P W R
PASSSER V
S Y S T P W R
EN TER TAIN MENT
FWDMSTR
C AL L R ESET
C A LL & S E R V I CE
MAINDOOR
UP
MAINDOOR
DOWN
W
W
ENTRY-L
ENTRY-R
ONANNCMT
ANNOUNCEMENT
READY
1
RSV2
RSV1
4
321
2
5
6
NEXT
78
1
STARTCANCLCONT
3
5
8 9
PWR
6
2
0
MAINTENANCEANDTEST ONLY
AFT MSTR
CALL RESET
OFF
SEATS
DEACT
LO HI
B/C
CABIN
A T TN D - L A TT N D - C EMER LTG
LEFT ENTRY CEILING
HI
BRD MUSIC VOLUME
OFF
CHANNELSELECT
12 3
4
.
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PASSENGER SERVICE SYSTEM - BUSINESS CLASS
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General
The Economy Class Passenger Service System on the B767-300
aircraft consists of two zones, mid and aft. The heart of the systemin each zone is a Column Timer Decoder (CTD). The CTD serves as
the interface unit between the Seat Electronics Box (SEB) and the
Passenger Service Unit Decoder (PSUD). It also has the clock that
provides the timing for the system. Additionally, there is one PSUD
for each seat group overhead location and a SEB for each seat group.
Terminators are located at the end of each SEB and PSUD column to
assist system timing and bidirectional data flow.
Row call lights, master call lights, and chimes indicate that a
passenger has made an attendant call.
Controls on the Forward Attendants Panel (P21) allow;
power to be applied to the system,
reading lights to be controlled,
additional indication and resetting of attendant calls and
system testing to be carried out.
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PASSENGER SERVICE SYSTEM - ECONOMY CLA
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COLUMN TIMERDECODER
PASSENGER SERVICEUNIT DECODER
MASTER CALLLIGHT (BLUE)
CHIME UNIT
FWD ATTENDANTS PANEL
62333AHA
READING/ROWLIGHTS
.
DIGITAL PASSENGERCONTROL UNIT
SEAT ELECTRONICSBOX
A
T
T
E
N
D
A
N
T
L
IG
H
T
V
O
L
U
M
E
C
H
A
N
N
E
L GROUND
SERVICE BUS
EMERG LIGHTS
PASS ENT &
SERV SYSTEM
NORMALMASTER
TEST
LAMP
TEST
ENTTEST
DA TA DIRCALLLTS
OVHD
AFT
OFF
ON
FWDFWD
AFT
ON
LO HI
READING
NORMAL
ONOFF
LIGHTS
PASS ENT
S Y S T P WR
PASS SERV
S Y S T P WR
ENTER TAINMENT
FWD MSTR
CA L L RE S E T
MAIN DOOR
UP
MAIN DOOR
DOWN
W
W
ENTRY-L
ENTRY-R
ONANNCMT
ANNOUNCEMENT
READY
1
R SV2
R SV1
4
321
2
5
6
NEXT
78
1
STARTCANCLCONT
3
5
8 9
PWR
6
2
0
MAINTENANCEANDTEST ONLY
AFT MSTR
CALL RESET
OFF
SEATS
DEACT
LO HI
B/C
CABIN
ATTND - L A TT ND - C E ME R L TG
LEFT ENTRY
CEILING
HI
BRD MUSIC
VOLUME
OFF
CHANNEL
SELECT
1
2 3
4
CALL ANDSERVICE
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B767ELECTRICAL
/INSTRUMENT
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COMPONENT LOCATIONS
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Flight Deck
The following circuit breakers are located on P11;
PASS ENTMT/SERVICE CONT (2.5 Amp) at position P11-3(T7)
VIDEO PROJ (5 Amp) at position P11-6 (T34)
Main Equipment Centre
Circuit Breakers - located on P36. PASS ENTERTAINMENT PSUD;
R FWD (10 Amp) - position J1
R AFT (10 Amp) - position J2
L FWD (10 Amp) - position J3 L AFT (10 Amp) - position J4
Circuit Breakers - located on P37. PASSENGER ENTERTAINMENT
CTD;
on aircraft OGA-OGM FWD (5 Amp) - position K1 AFT (5 Amp) - position K
on aircraft OGN-999 MID (5 Amp) - position J7 AFT (5 Amp) - position J
Circuit Breakers - located on P37. PASSENGER
ENTERTAINMENT;
on aircraft OGA-OGM CAR (7.5 Amp) - position J1 VCC (7.5 Amp) - position J
Circuit Breakers - located on P3
BOX (ADB);
on aircraft OGA-OGM ADB-1 (15 Amp) - positio ADB-2 (15 Amp) - positio ADB-3 (15 Amp) - positio ADB-4 (15 Amp) - positio ADB-5 (15 Amp) - positio
Circuit Breakers - located on P1
on aircraft OGN-999 ASB-1 (5 Amp) ADB-1 (15 Amp) VCC (7.5 Amp)
Located in P33;
PSS Power relay
Located on the E2-5 Rack;
Passenger Entertainment Sys
Located above and forward of th
Area Services Box
Mid Column Timer Decoder
Mid Equipment Centre
Located below the E5-1 rack;
Aft Column Timer Decoder
23.34 PSS B767-300 COMPONENT LOCATIONS
M00
FLIGHT DECK AND EQUIPMENT CENTRES
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(LOOKING DOWN)
MOUNTED ABOVE & ADJACENT TO
E2 RACK IN MAIN EQUIPMENT CENTER
BEAMSFLOOR
POWER RELAYS
BREAKERS PES/PSS CIRCUIT
EQUIP PANEL, P33FWD MISC ELECTRICAL
EQUIP PANEL, P37RIGHT MISC ELECTRICAL
MAIN EQUIPMENT C
MID EQUIP
FWD CARGO
DOOR (REF)
CEIOF
A
AREA SERVICE BOX
MID COLUMNTIME DECODER
CIRCUIT BREAKER PANEL (P11-3) PASS ENTMT/SERVICE CONT (T7)
FLIGHT DECK
CIRCUIT BREAKER PANEL (P11-6)
VIDEO PROJ (T34)
.
RIGHT MISC ELECTRICALEQUIPMENT PANEL, P101(JUST FWD OF P54 ON R/HSIDE OF R/H CRAWL WAY) IVS CIRCUIT BREAKERS
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Passenger Cabin Deck
The following items are located within the Passenger Cabin Deck
area:
Fwd Attendance Panel - Fwd left main entry door.
Central Stowage Unit - Fwd galley, aft unit station 347.
Flight Service Director (FSD) station - first bulkhead aft of theforward left entry doorway.
Business Seats - Fwd Zone; Video/Audio Seat Electronics Box (VASEB) - one per seat
group, regardless of the number of seats in the group, locatedunder the seat.
Advance Digital Passenger Control Unit (ADPCU) - one perseat, located in the arm.
Economy Seat Group - Mid and Aft Zones; Seat Electronics Box (SEB) - one per seat group, whether a 2
or 3 seat group, located under the seat. Digital Passenger Control Unit (DPCU) - one per seat, located
in the arm.
Passenger Cabin Ceiling
The following items are located in the Passenger Cabin Ceiling area:
Relays RZ002 and RZ004 - above Central Stowage Unit (CSU)station 346.
Area Distribution Box - station 400 in the ceiling above seat 1F(R/H aisle).
ADB Termination Plug - on the ADB (2 off).
Passenger Services System Controller (PSSC) - Cabin AvionicsRack (CAR) in the L/H aisle above the second ceiling panel atstation 437 LBL 25.
23.34 PSS B767-300 COMPONENT LOCATIONS
M00
PASSENGER CABIN AREA
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STA
347 STA500
FWD
ATTENDANTS
PANEL
CHIME UN
MASTER C
CENTRAL STOWAGE UNIT
& RELAYS RZ002 - RZ004
CABIN AVIONICS RACK (CAR)
PASSENGER SERVICE
SYSTEM CONTROLLER
STA400
AREA DISTRIBUTION BOX
ADB TERMINATION PLUG
PASSENGER S
UNIT DECODE
RACEWAY CABLELOCATION
BUSINESS CLASSSEAT GROUP ECONOMY CLASS
SEAT GROUP
FWD ZONE AFT ZONEMID ZONE
VIDEO AUDIO SEAT
ELECTRONICSBOXES ORSEAT ELECTRONICSBOXES
ADVANCED DIGITALPASSENGER CONTROL UNITS
OR DIGITAL PASSENGERCONTROL UNITS
.
FLIGHT SERVICE
DIRECTORS (FSD)
STATION
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PASSENGER CABIN AREA
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General
On Qantas 767-300 aircraft, two different configurations are
available. The two configurations are those aircraft fitted with eithera:
Central Stowage Unit (CSU), or
Flight Service Director (FSD) station.
Central Stowage Unit (CSU)
The Central Stowage Unit (CSU) contains the following components:
Main Power Switch,
labelled VIDEO AUDIO SYSTEM Cabin Management Terminal (CMT)
3.5mm Floppy Disk Drive
Stowage for CMT Software Disks
A maintenance keyboard jack, accessed by removing a smallcoverplate secured by 2 philips screws, to enable a PC to beplugged in (for Tech Services use).
NOTE: The Central Stowage Unit (CSU) is only fitted to earlymodel 767-300 aircraft or those not fitted with the FlightService Directors (FSD) station.
Flight Service Directors (FSD) station
The Flight Service Directors (FSD) station contains the following
components:
Main Power Switch, labelled VIDEO AUDIO
Cabin Management Terminal
3.5mm Floppy Disk Drive Stowage for CMT Software D
NOTE: The Flight Service Dirlate model 767-300 aideletion of the Centra
23.34 PSS B767-300 COMPONENT LOCATIONS
M00
CENTRAL STOWAGE UNIT / FSD STATION
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P.S.U.OXYGEN
GASPER OUTLET
LIGHT / POWER SWITCH
AIR SHOW
V.C.P.
CASSETTE DRAWERS(3 OFF @ 15 TAPES EA)
E.L.T. BEACON
MANUALSTORAGE
HANDSET
C.M.T.
NO SMOKING
CMT SOFTWAREDISK STOWAGE
FSD STATION
CENTRAL STOW
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CENTRAL STOWAGE UNIT / FSD STATION
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General
Cable runs to the PSUDs and VASEBs and SEBs are shown below.
There are three columns of seat groups in each zone.
The overhead cable runs for the PSUDs in the Fwd Zone are now
fed from an Area Services Box (ASB) while the Mid and Aft Zones
are feed by CTDs. Each overhead run is ended with a Termination
Plug for the PSUDs.
In the seat feed cabling for the VASEBs and SEBs, both floor and
sidewall disconnects are used. For VASEBs, each column run can
have a maximum of 8 to 12 seat groups (dependant on current draw)
and is ended with a Termination Plug. For SEBs, each column run
can have a maximum of 31 seat groups and is ended with aTermination Plug.
23.34 PSS B767-300 COMPONENT LOCATIONS
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CABIN CABLE DISTRIBUTION
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FROM MID COLUMN
TIME DECODER (CTD)FROM AFT COLUMNTIME DECODER (CTD)
FROM AREASERVICES BOX (ASB)
OVERHEAD FEEDS
SEAT FEEDS
SIDE WALL DISCONNECTS TERMINATION PLUG
FLOOR DISCONNECTS
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CABIN CABLE DISTRIBUTION
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B767ELECTRICAL
/INSTRUMENT
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INTERFACE DIAGRAMS
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General
Power from the 115V AC Right Utility Bus through the VCC circuit
breaker, via relay RZ004, provides power to:
The Cabin Management Terminal The CMT in turn supplies 5V DC power for the Floppy Disk
Drive.
A Cooling Fan for the Video Control Centre
Power from the 115V AC Right Utility Bus, via relay RZ002,
provides power to:
Passenger Entertainment System Controller through the CARcircuit breaker.
Passenger Services System Controller through the CAR circuitbreaker.
Area Distribution Box via the ADB 1 circuit breaker. The ADB in turn supplies 115V AC to each column of Video
Audio Seat Electronics Boxes via individual internal 5 ampautomatically resetable circuit breakers.
The VASEBs provide 9V DC to their associated ADPCUs.
Control of relays RZ002 and RZ004 is from SW1 Power Switch
providing 28V DC R Bus through the VIDEO PROJ circuit breaker.
23.34 PSS B767-300 INTERFACE DIAGRAMS
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FIRST V
RIGHT COLUMN
LEFT COLUMN
CENTRE COLUMN 9V DC
115V AC 115V A
SAME AS CENTRECOLUMN VASEB
AREADISTRIBUTIONBOX
CABIN MA TERM
PASSENGER ENTERTAIMNENT
SYSTEM CONTROLLER
115V ACUTIL
R BUS
RIGHT MISCELLANEOUSEQUIPMENT PANEL (P37)
RZ 004RELAY
VCC
CAR
ADB - 1
RZ 002RELAY
OVERHEAD CIRCUITBREAKER PANEL P11-6
VIDEO PROJ
28V DCR BUS
VIDEO AUDIO
SYSTEM SWITCH(SW 1)
COOLING FAN
.
115V AC
115V AC
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General
Power from the 115V AC Right Bus through the FWD CTD circuit
breaker and via K458 FWD PSS PWR relay is provided to the AreaServices Box (ASB) and the Mid Column Time Decoder (CTD). The
AFT CTD circuit breaker supplies 115V AC via the same path to the
Aft CTD. Both CTDs provide 35V AC to the columns of Seat
Electronics Boxs (SEBs) in each zone. In turn the SEBs provide 5V
DC to the Digital Passenger Control Units (DPCUs).
Power from the 115V AC Ground Service Bus via the C PSUD
FWD circuit breaker and K458 FWD PSS PWR Relay is provided to
the centre column Passenger Service Unit Decoders (PSUDs) in the
fwd and mid zones. The same bus supplies 115V AC via the C
PSUD AFT circuit breaker via the same path to the centre columnPSUDs in the aft zone.
Power from the 115V AC Left Utility Bus via the R PSUD FWD
circuit breaker and K459 AFT PSS PWR Relay is provided to the
right column PSUDs in the fwd and mid zones. The same bus
supplies 115V AC via the L PSUD FWD circuit breaker via the same
path to the left column PSUDs in the fwd and mid zones. The same
bus supplies 115V AC via the R PSUD AFT circuit breaker via the
same path to the right column PSUDs in the aft zone. The same bus
supplies 115V AC via the L PSUD AFT circuit breaker via the same
path to the left column PSUDs in the aft zone.
Control to relays K458 and K459 is from the PASS SERV SYST
PWR Switch on Fwd Attendants Panel P21, which is supplied 28V
DC Left bus power via the PASS ENTMT/SERVICE CONT circuit
breaker.
23.34 PSS B767-300 INTERFACE DIAGRAMS
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POWER 2: OGA-OGM
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General
Power from the 115V AC Right Utility Bus, through the K2225 IVS
CONT-1 RELAY and via the IVS circuit breaker, provides power tothe :
Cabin Management Terminal, The CMT in turn supplies 5V DC power for the Floppy Disk
Drive.
Passenger Entertainment System Controller.
Passenger Services System Controller.
Cooling Fan for the Video Control Centre.
Power from the 115V AC Right Utility Bus, through the K2225 IVS
CONT-1 RELAY and via the ADB circuit breaker, provides powerto:
The Area Distribution Box. The ADB in turn supplies 115V AC to each column of Video
Audio Seat Electronics Boxes (VASEBs) via individual internal5 amp automatically resetable circuit breakers.
The VASEBs provide 9V DC to their associated ADPCUs
Control of K2225 IVS CONT-1 relay is from SW1 Video Audio
System Switch providing R Bus 28V DC via the VIDEO PROJ
circuit breaker.
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FIRST VASEB
RIGHT COLUMN
LEFT COLUMN
CENTRE COLUMN 9V DC
115V AC
SAME AS CENTRECOLUMN VASEB
AREADISTRIBUTIONBOX
CABIN MA TERM
PASSENGER ENTERTAIMNENTSYSTEM CONTROLLER
OVERHEAD CIRCUITBREAKER PANEL P11-6
VIDEO PROJ
28V DCR BUS
VIDEO AUDIO
SYSTEM SWITCH(SW 1)
B
ADP
COOLING FAN
.
115V ACR UTILITYBUS
ADB-1
IVS-VCC
K2225 RELAY-
IVS CONT-1
P101 FWD RIGHT MISCELLANEOUSELECTRIC EQUIPMENT PANEL
115V AC
115V AC
115V AC
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General
Power from the 115V AC Right Bus through the ASB circuit breaker
is provided directly to the Area Service Box.
Power from the 115V AC Right Bus through the MID CTD circuit
breaker and via K458 FWD PSS PWR relay is provided to the Mid
Column Time Decoder (CTD). The AFT CTD circuit breaker
supplies 115V AC via the same path to the Aft CTD. Both CTDs
provide 35V AC to the columns of Seat Electronics Boxs (SEBs) in
each zone. In turn the SEBs provide 5V DC to the Digital Passenger
Control Units (DPCUs).
Power from the 115V AC Ground Service Bus via the C PSUD
FWD circuit breaker and K458 FWD PSS PWR Relay is provided tothe centre column Passenger Service Unit Decoders (PSUDs) in the
fwd and mid zones. The same bus supplies 115V AC via the C
PSUD AFT circuit breaker via the same path to the centre column
PSUDs in the aft zone.
Power from the 115V AC Left Utility Bus via the R PSUD FWD
circuit breaker and K459 AFT PSS PWR Relay is provided to the
right column PSUDs in the fwd and mid zones. The same bus
supplies 115V AC via the L PSUD FWD circuit breaker via the same
path to the left column PSUDs in the fwd and mid zones. The same
bus supplies 115V AC via the R PSUD AFT circuit breaker via thesame path to the right column PSUDs in the aft zone. The same bus
supplies 115V AC via the L PSUD AFT circuit breaker via the same
path to the left column PSUDs in the aft zone.
Control to relays K458 and K45
PWR Switch on Fwd Attendant
DC Left bus power via the PASS
breaker.
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AREA SERVICEBOX
MID COLUMNTIME DECODER
MID CTD (K1)
AFT CTD (K2)
115V AC
R BUS
OVERHEAD CIRCUITBREAKER PANEL P11-3
PASS ENTMT/SERVICE CONT (T8)
28V DCL BUS
K458 FWD PSSPWR RLY (P33)
.
RIGHT MISCELLANEOUSEQUIPMENT PANEL (P37)
115V ACGND SVCEBUS
C PSUD FWD (K3)
C PSUD AFT (K4)
FWD MISCELLANEOUSEQUIPMENT PANEL (P33)
115V ACL UTILBUS
R PSUD FWD (J1)
L PSUD FWD (J3)
LEFT MISCELLANEOUSEQUIPMENT PANEL (P36)
R PSUD AFT (J2)
L PSUD AFT (J4)
K459 AFT PSSPWR RLY (P33)
PSUD PSU
LEFT AFT PSUD COLUMN
RIGHT FWD PSUD COLUMN
RIGHT MID PSUD COLUMN
CENTRE FWD PSUD COLUMN
CENTRE MID PSUD COLUMNCENTRE AFTPSUD COLUMN
CENTRE SEBCOLUMN RIGHT SE
COLUMN
SEB SEB
DPCU
5V DC
35V AC
35V AC
35V AC
FWD RIGHT MISC ELECEQUIP PANEL (P101)
ASB
115V AC
R BUS DPCU
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Cabin Management Terminal (CMT)
The CMT is the interface unit for the cabin attendant to control the
system and to carry out programming functions. The CMT is loadedwith the aircraft configuration database which is provided to a
number of LRUs. Communication between the CMT and main
controller LRUs is via a Token Ring LAN (T-R data bus).
The CMT provides Attendant Call and Reset functions as well as
testing of the System 2000 components.
On initial application of power to the Passenger Service System, the
following units receive a complete copy of the aircraft configuration
database held within the CMT;
PESC
ADB
VASEB
PSSC
ASB
This aircraft configuration database is stored in each units
nonvolatile memory for use during system operation. The PESC and
PSSC receive the database via the T-R data bus. These two
controllers provide the database, via appropriate data buses, to the
appropriate LRUs.
Floppy Disk Drive
13 data and control lines are con
Drive (FDD) to the CMT. It is usoftware and aircraft configuratio
NOTE: The Operational SoftwLRUs can only be dow
Passenger Entertainme
RS-485 data bus lines connect th
default aircraft configuration
BITE commands/results.
Passenger Service System int
Although two data busses are co
this configuration. Data bus 2 w
and development of the system.
BITE is requested by the CMT v
changes to the program defaults
operation, commanding other LR
BITE results from all LRUs repoBITE report to the CMT.
The number 1 air/ground system
the PESC to provide air/ground
functions.
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TO FWD ZONECENTRE COLUMN
VASEBs
TO FWD ZONERIGHT COLUMN VASEBs
.
PASSENGERENTERTAINMENTSYSTEMS CONTROLLER
PASSENGER SERVICESYSTEMS CONTROLLER
ADVANCED DIGITALPASSENGERCONTROL UNIT
DATA OUT
DATA IN
ADVANCED DIGITAPASSENGERCONTROL UNIT
DATA OUT
DATA IN
DATA 2
DATA 1
DATA 2
DATA 1
DATA 2
DATA 1
FWD ZONELEFT COLUMN
ADB COLUMNTERMINATOR
DATA 2
ADB END
TERMINATOR
T-R DATA IN
T-R DATA OUT
AREADISTRIBUTIONBOX
AREASERVICE BOX
ARINC 429 OUT
T-R DATA IN
T-R DATA OUT
T-R DATA OUT
T-R DATA IN
DATA 2
DATA 1
FWD ZONELEFT COLUMN
ASB ENDTERMINATOR
FIRST PASSENGERSERVICE UNIT DECODER
TO FWD ZONE
RIGHT COLUMN
PSUDs
TO FWD ZONE
CENTRE COLUMNPSUDs
DATA 2DATA 1
DATA 2
DATA 1
DATA 2
DATA 1
FLOPPY
DISCDRIVE
CABIN MANAGEMENT TERMINAL
ARINC 429 IN
ARINC 429 OUT
ARINC 429 IN
FIRST VIDEO AUDIOSEAT ELECTRONICS
BOX
DATA 1
AIR/GNDRELAY
13
DATA &
CONTROL
T
C
RIGHT
LEFT TO FWDCHIME UNITS
RIGHT
LEFT
ADDRESSBITS
NC
ADDRESSBITS
NC
uP
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Passenger Services System Controller
The PSSC receives and transmits commands and responses to/from
the PESC via ARINC 429 data busses.
It provides the link to the overhead network. The PSSC is connected
to the ASB via RS-485 data lines. Again, only data bus 1 is used in
this configuration.
Area Services Box
The ASB fulfils the role previously carried out by the Column Timer
Decoder. It supplies power to operate the master call lights and
chime units. It interfaces with the PSUDs to control reading lightsand row call lights. Data 1 and data 2 lines are used to communicate
information under normal conditions. The information along data 1
and data 2 is the same, but it is fed down data 1 during one cycle
and then data 2 on the next cycle and so on. In this respect it
functions the same as the CTD in the zones not installed with
System 2000.
The ASB has a hard wired address. In this case since there is only
one ASB, its address is all address bits open.
Passenger Service Decoder Unit
The PSUDs decipher the data string from the ASB to control the
reading lights and row call lights for a seat row. They are connected
in a daisy chain with the last PSUD in each column having a
terminator. The terminator is a link between data 1 and data 2.
Area Distribution Box
The ADB acts as a zone control
data to the seat network. The PEbus, is used for two way commu
ADB. The activity on this databu
zonal seat network configuraADB.
PSS data originating from thPESC.
The ADB-VASEB RS-485 Data
between the ADB and VASEBs.
the seatbox addresses over this d
service data such as reading lam
up along this data line and even
line 2 is not used at present.
NOTE: Zone ADBs can be coconfiguration there is
The series output which normall
terminated by an end terminator
are terminated by two 100 ohm
The ADB has a hard wire addre
one ADB its address is all addre
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TO FWD ZONECENTRE COLUMN
VASEBs
TO FWD ZONERIGHT COLUMN VASEBs
.
PASSENGERENTERTAINMENTSYSTEMS CONTROLLER
PASSENGER SERVICESYSTEMS CONTROLLER
ADVANCED DIGITALPASSENGERCONTROL UNIT
DATA OUT
DATA IN
ADVANCED DIGITAPASSENGERCONTROL UNIT
DATA OUT
DATA IN
DATA 2
DATA 1
DATA 2
DATA 1
DATA 2
DATA 1
FWD ZONELEFT COLUMN
ADB COLUMNTERMINATOR
DATA 2
ADB END
TERMINATOR
T-R DATA IN
T-R DATA OUT
AREADISTRIBUTIONBOX
AREASERVICE BOX
ARINC 429 OUT
T-R DATA IN
T-R DATA OUT
T-R DATA OUT
T-R DATA IN
DATA 2
DATA 1
FWD ZONELEFT COLUMN
ASB ENDTERMINATOR
FIRST PASSENGERSERVICE UNIT DECODER
TO FWD ZONE
RIGHT COLUMN
PSUDs
TO FWD ZONE
CENTRE COLUMNPSUDs
DATA 2DATA 1
DATA 2
DATA 1
DATA 2
DATA 1
FLOPPY
DISCDRIVE
CABIN MANAGEMENT TERMINAL
ARINC 429 IN
ARINC 429 OUT
ARINC 429 IN
FIRST VIDEO AUDIOSEAT ELECTRONICS
BOX
DATA 1
AIR/GNDRELAY
13
DATA &
CONTROL
T
C
RIGHT
LEFT TO FWDCHIME UNITS
RIGHT
LEFT
ADDRESSBITS
NC
ADDRESSBITS
NC
uP
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Area Distribution Box (Continued)
The ADB is designed to feed four columns of VASEBs and has an
auxiliary output (for crew rest compartment). Three of the four
normal outputs are used (left, centre, right) and the remaining normal
output is terminated by a column terminator again to prevent
reflections. The auxiliary output is not used and does not need to be
terminated.
The end terminator and column terminator have the same resistors
fitted, but are different u