Chptr-32 PSS,31,34 Air Data.pdf

8/10/2019 Chptr-32 PSS,31,34 Air Data.pdf

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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.


3/629

PSS B767-200

Table of Contents

Subchapter

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSTEM PRINCIPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


4/629

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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.

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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.


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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

.

g62333as

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

.

g62333at

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.


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


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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.


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)


24/629

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.


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

.

g62333av

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

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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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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.


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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

.

g62333ay

SEAT ELECTRONICS BOX


32/629

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.


M00

PASSENGER SERVICE UNIT DECODER


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J3

J2

J1

SIDE

PSUD TERM

END

.

g62333az



34/629

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.


M00

PASSENGER CONTROL UNIT


35/629

TOPVIEW

.

READING LIGHT

SWITCH

ATTENDANT CALL

SWITCH

5

SEAT HARNESSCONNECTION

g62333ac



36/629

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.


M00

ELECTRONIC CHIME UNIT


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.

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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


M00

FORWARD ATTENDANTS PANEL - PSS CONTRO


39/629

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

g62333ad

FORWARD ATTENDANTS PANEL - PSS CONTROLS


40/629

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.


M00

ATTENDANT CALL LIGHTS


41/629

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

g62334at

ATTENDANT CALL LIGHTS


42/629

B767ELECTRICAL

/INSTRUMENT

BOOK

18Page42

INTENTIONALLY

BLANK


43/629

SYSTEM PRINCIPLES

g62334at


44/629

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


45/629

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

g62334au

PSS DATA COMMANDS


46/629

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


M00

PSS DATA TRANSMISSION


47/629

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


48/629

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.


M00

PSS DATA TRANSMISSION(Continued)


49/629

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)


50/629

B767ELECTRICAL

/INSTRUMENT

BOOK

18Page50

INTENTIONALLY

BLANK


51/629

SCHEMATIC DIAGRAM

g62334av


52/629

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


53/629

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


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


ON

CALL

RESETATTENDANT

CALL

READING

LIGHT

CTD

AFTTO

.

g62333bb

SYSTEM SCHEMATIC


54/629

B767ELECTRICAL

/INSTRUMENT

BOOK

18Page54

INTENTIONALLY

BLANK


55/629

INSTALLATION

g62333bb


56/629

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


57/629

TO PCU

MUX IN

NYLON FASTENERS

COVER

SEAT

.

g62334ap

SEAT ELECTRONICS BOX INSTALLATION


58/629

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


59/629

P

PSU

LIGHTS

READING

2O

LATCHES

MASK

.

g62333aw

PASSENGER SERVICE UNIT DECODER INSTALLATION


60/629

B767ELECTRICAL

/INSTRUMENT

BOOK

18Page60

INTENTIONALLY

BLANK


61/629

TESTING

g62333aw


62/629

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


63/629

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

g62333ah

SELF TEST - ATTENDANT PANEL


64/629

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.


M00

MASTER TEST


65/629

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

g62334ax

MASTER TEST


66/629

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.


M00

LAMP TEST


67/629

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

.

g62334ay

LAMP TEST


68/629

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.


M00

OVHD DATA DIR FWD TEST


69/629

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.

g62334az

OVHD DATA DIR FWD TEST


70/629

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.


M00

OVHD DATA DIR AFT TEST


71/629


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

g62334ba

OVHD DATA DIR AFT TEST


72/629

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.


M00

SEATS DATA DIR FWD TEST


73/629

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


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

g62334bb

SEATS DATA DIR FWD TEST


74/629

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.


M00

SEATS DATA DIR AFT TEST


75/629

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

.

g62334bc

SEATS DATA DIR AFT TEST


76/629

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


M00

FIM TROUBLESHOOTING


77/629

PCU PCU PCU PCU


PASSENGER SERVICEUNIT GASPER AIR

OUTLETS

FROM PREVIOUS SEAT GROUP

LOCATED INSEAT TRACK

TO NEXTSEAT

FROM PREVIOUSSEAT GROUP

PSUD TERMIN

SEB T

.

OXYGENMASKS

g73323cq

FIM TROUBLESHOOTING


78/629

B767ELECTRICAL

/INSTRUMENT

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INTENTIONALLY

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79/629

PSS B767-300

Table of Contents

Subchapter

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INTERFACE DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSTEM PRINCIPLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DISPLAYS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSTEM PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


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/INSTRUMENT

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INTENTIONALLY

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81/629

INTRODUCTION

g73323cq


82/629

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.


M00



83/629

.

g62333ao



84/629

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.


M00

PASSENGER SERVICE SYSTEM - BUSINESS CLA


85/629

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


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

.

g62333ai

PASSENGER SERVICE SYSTEM - BUSINESS CLASS


86/629

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.


M00

PASSENGER SERVICE SYSTEM - ECONOMY CLA


87/629

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


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

g62333bf

PASSENGER SERVICE SYSTEM - ECONOMY CLASS


88/629

B767ELECTRICAL

/INSTRUMENT

BOOK

18Page88

INTENTIONALLY

BLANK


89/629

COMPONENT LOCATIONS

g62333bf


90/629

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


M00

FLIGHT DECK AND EQUIPMENT CENTRES


91/629

(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

g62333ap

FLIGHT DECK AND EQUIPMENT CENTRES


92/629

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.


M00



93/629

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

g62334ai



94/629

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


M00

CENTRAL STOWAGE UNIT / FSD STATION


95/629

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

g62333br

CENTRAL STOWAGE UNIT / FSD STATION


96/629

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.


M00

CABIN CABLE DISTRIBUTION


97/629

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

g62334aj

CABIN CABLE DISTRIBUTION


98/629

B767ELECTRICAL

/INSTRUMENT

BOOK

18Page98

INTENTIONALLY

BLANK


99/629

INTERFACE DIAGRAMS

g62334aj


100/629

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

M00

POWER 1: OGA-OGM


101/629

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

g62333bh

POWER 1: OGA-OGM


102/629

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.


M00

POWER 2: OGA-OGM


103/629


104/629

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.


M00

POWER 1: OGN-OGU


105/629

FIRST VASEB

RIGHT COLUMN

LEFT COLUMN

CENTRE COLUMN 9V DC

115V AC

SAME AS CENTRECOLUMN VASEB

AREADISTRIBUTIONBOX

CABIN MA TERM

PASSENGER ENTERTAIMNENTSYSTEM CONTROLLER


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

g62333bn

POWER 1: OGN-OGU


106/629

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.


M00

POWER 2: OGN-OGU


107/629

AREA SERVICEBOX

MID COLUMNTIME DECODER

MID CTD (K1)

AFT CTD (K2)

115V AC

R BUS


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

g62333bo

POWER 2: OGN-OGU


108/629

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.


M00

SIGNAL FLOW - BUSINESS CLASS


109/629

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

g62333ak

SIGNAL FLOW - BUSINESS CLASS


110/629

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


M00

SIGNAL FLOW - BUSINESS CLASS(Continued)


111/629

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

g62333ak SIGNAL FLOW - BUSINESS CLASS

(Continued)


112/629

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

Chptr-32 PSS,31,34 Air Data.pdf

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Transcript of Chptr-32 PSS,31,34 Air Data.pdf