Physio-Control Lifepak 6 ECG User and service manual

LIFEPAK6

Portable Cardiac Care System

(^

Operating and Service

Manual No.

800533-01

PhysioControl

Redmond,

Cable:

PHYSIO-RED,

Manual

January

11811

Willows

Washington

206/883-1181

Telex:

1979

Road

98052

32-0166

\

c

SERIAL

LIFEPAK®

Corporation, 11811 Willows Road,

and

Physio-Control®

NO.

are

trademarks

Redmond,

of the

Washington 98052

Physio-Control

,//^%'

Due

to

continuing

figurationofthis

pages

historical

the

of

mation detailed

or

impactedbya

form

that

pages

the

effected.

page,apage

sectionatthe

information

Physio-Control,

CHANGE

design

instrument

update

may

particular

will

Each

design

log

all

individual

and

withnodateisan

rearofthis

concerning

Redmond,

changes,

Washington.

SUMMARY

additionofoptions

change.

This

form

changeorupdate.

changes,

change

manual

with

page

original

for

any

contact

the

will

page.

interim

your

available,

will

accompany

Thisisa

dateofthese

be

datedatthe

Check

the

change

changes.

Service

Representative

the

con

any

change

continuing

changes

and

bottom

infor

For

more

CHANGE

May 1978

Jar..

1979

DATE

PAGES

Front

2-19,

3-16/3-17,

3-35/3-36, 3-38

thru

3-58/3-59, 4-1

4-16, 4-18

5-3

6-1

Front

iii\ 2-5, 2-3, 2-21,

3-11,

3-15

3-24 thru 3-27, 3-35

thru

3-47,

thru 3-53, 3-55, 3-57 thru

3-61, 4-10 thru

4-13, 4-19, 4-29,

4-41

4-18A, 4-13B, 4-42

thru

EFFECTED

page,

3-7/3-8,

3-26/3-27,

3-43,

thru

1-4 thru

thru

3-42,

(added

4-46)

3-47/3-08,

5-64

6-24

page,

3-7 thru

3-12,

3-40,

4-2 thru 4-5,

i,

2-10,

3-14,

3-19,

3-44,

3-51

3-59,

4-16,

pages

thru

ii,

1-7,

2-12

3-9.

3-21

REASON FOR

Pages

reflect the

figuration

changes

IV)

SectionVupdated

new

lists

Section

added

schematic

applicable.

Pages

to

configuration

functional

(SectionsIthru

of

text

(SectionsIIthru

drawings

as

applicable.

VI

engineering

of

text

reflect

CHANGE

updated

latest

and

functional

and

updated

drawings

updated

the

latest

and

changes

EFFECTIVITY

to

con

with

parts

and

as

IV).

5-2

thru

5-65

SectionVupdated

bly

lists

drawings

as

and

applicable.

assem

parts

CHANGE

SUMMARY

(Continued)

CHANGE DATE

Jan. 1979

(continued)

PAGES EFFECTED

6-1 thru 6-33

REASON

FOR CHANGE

SectionVIupdated

and

added

waveforms

applicable

and/or

voltages.

schematics

test

point

EFFECTIVITY

TABLE

OF

CONTENTS

SECTION

I.

II.

PAGE

LIST LIST

INTRODUCTION

1-1

1-2

1-3 General 1-1

1-4

1-5 DC Defibrillator Module 1-3

1-6

1-7

1-8 DC Defibrillator Module 1-3

1-9

OPERATION 2-1 2-1 General 2-1

2-2 Controls and Indicators 2-1

2-3

2-4 Module Connection 2-10

2-5

2-6

2-7 DC Defibrillator Module 2-12

2-8

2-9

2-10

2-11

2-12

OF

ILLUSTRATIONS

OF

TABLES

Scope

Physical

Description

Cardioscope/Recorder

Features

and

Functional

Cardioscope/Recorder

Synchronized

Operating

Input

Power,

Instructions

Cardioversion

AC

or

Cardioscope/Recorder

Synchronized

Operator

Operational

Recorder Recorder

Cardioversion

Service

Checkout

Paper

Stylus

Replacement

Module

Description

Module

DC

Operation

Module

and

Adjustment

. .

iii

iv

1-1

1-3

1-8

2-10

2-11

2-13

2-14

2-12 2-19

III. CIRCUIT DESCRIPTION 3-1

3-1 Introduction 3-1

3-2

3-3 Monitor Module Circuits 3-1

3-4 Defibrillator Module Circuits 3-3

3-5

3-6

3-7 3-8 3-9 3-10

3-11

3-12

3-13

3-14

3-15

3-16

Functional

Description

Cardioscope/Recorder

Preamplifier

Rate

Board No-Fade Recorder Rate

Power

Display

Supply/Deflection

Monitor

DC

Defibrillator

Main

Board

Defibrillator

Test

Load Board 3-61

Board

Circuitry

Board

Circuitry

Board

Charger

Circuitry

Charger

Circuitry

Board

Circuitry

Board

Circuitry

Board

Circuitry

. .

. . .

Jan.

3-1

3-6

3-12 3-24 3-34 3-34

3-38

3-44

3-46

3-57

1979

TABLEOFCONTENTS

(continued)

SECTION

IV.

V.

MAINTENANCE

4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10 4-23

4-33

4-39

4-40

4-51

4-54

PARTS

5-1

5-2

5-3

Introduction

General

Warranty

Test

Repair

Cleaning

Component

Cardioscope/Recorder

Troubleshooting

Test Major

DC

Defibrillator

Troubleshooting

Test

Major

Battery

LISTS

AND

General

Parts

Part

Lists

Ordering

Equipment

Techniques

Identification

Module

and

Calibration

Component

and

Calibration

Component

Maintenance

ASSEMBLY

Removal

Module

Removal

Guide

DRAWINGS

and

Installation

and

Installation

: • • •

. .

PAGE

4-1

j"j

4-1

4-3

4-4

4-4 4-19

4-25

4-29

4-37

4-41

5-1

jj-l

£~|

b_1

VI.

SCHEMATICS

6-1

General

ii

Jan.

6~l

b_i

1979

LIST

OF

ILLUSTRATIONS

FIGURE

1-1 LIFEPAK 6 1-2

1-2

2-1 2-2

2-3 DC

2-4 Module Connection 2-11

2-5

2-6

3-1

3-2 3-3 3-4 3-5

3-6 Rate Board Schematic 3-16

3-7

3-3

3-9 No-Fade Board Schematic 3-26

3-10

3-11 Recorder Board Schematic 3-35

3-12

3-13

3-14

3-15 Main Board Schematic 3-47 3-16 On-Off Control 3-49 3-17 Paddle Interlocks Path to Ground 3-56

3-18

3-19 Test Load Board Schematic 3-62

4-1 4-2

4-3

4-4 4-5

4-6

4-7 4-8

Typical

ECG

Waveform

Cardioscope/Recorder Cardioscope/Recorder

Defibrillator

Recorder

Stylus

Block

Block Preamplifier Preamplifier Rate

Rate

Beat

Cardioscope

Display

Power

Monitor

Defibrillator

Paper

Replacement

Diagram

Placement

Cardioscope/Recorder

DC Board Board,

Board,

Count

Period

Block

Timing

Sensing,

(CRT)

Board

Schematic

Supply/Deflection

Charger

Board

Charger

Cardioscope/Recorder Offset

Check

Setup

Cardioscope/Recorder

DC

Defibrillator

DC

Defibrillator

DC

Defibrillator

DC

Defibrillator

Battery

PARTS SCHEMATIC

Voltage

LISTS

DRAWINGS

AND

Profile

ASSEMBLY

TITLE

Controls Module

Module Controls and Indicators

Defibrillator

Schematic

Block

Diagram

Sampling

Display

Board

Schematic

Board

Module

Major

Key

Voltage

Module

Output

Major

Component

Waveforms

Component

(SECTION

and

Rear

Diagram

and

Schematic

Schematic Component

Component

Waveforms

DRAWINGS

VI)

Indicators

Panel

Weighted

Average

Identification

Removal

Identification

Removal

(SECTION

V)

....

...

....

.

. .

PAGE

1-3

2-2 2-5

2-6

2-19

2-21

3-2

3-4 3-7

3-10

3-13

3-20

3-22

3-31

3-37

3-39

3-45

3-53 4-9

4-13

4-20

4-30 4-32

4-35

4-39 4-46

u^

iii Jan. 1979

LIST OF TABLES

TABLE

1-1

2-1

2-2

2-3

2-4

2-5

2-6

4-1

4-2

4-3 4-4

4-5

4-6

5-1

5-2

6-1

TITLE

LIFEPAK6General

Cardioscope/Recorder

Indicators

Cardioscope/Recorder

DC

Defibrillator

Cardioscope/Recorder

DC

Defibrillator

Cardioscope/Recorder

Operational

Test

Cardioscope/Recorder

Power

Equipment

Supply

Lead

Select

DC

Defibrillator

Energy

Cardioscope/Recorder

Drawings

DC

Defibrillator

Drawings

Schematic

Verification

Select

Drawings

Specifications

Module

Controls

Module

Operational

and

DC

Checkout

Troubleshooting

Voltage

Check

Test

Troubleshooting

Tolerances

Parts

List

Controls

Rear

Operational

and

Panel

and

Indicators

Checkout

Defibrillator

•

Guide

and

Assembly

and

Assembly

....

PAGE

1-4

z~*

£•-$

2-7

2-15

2-17

2-18

4-£

4-b

4-11

4-1/

4-26

4-33

5-2

l~*z

b~'

/^\

IV

SECTION

INTRODUCTION

I

1-1.

1-2

l-:3.

SCOPE

The

manual

provides

the

operating LIFEPAK6Cardioscope/Recorder factured

The descriptions procedures;

PHYSICAL

The

following

the

Cardioscope/Recorder

Figure

DC

Defibrillator

of

LIFEPAK

General.

system

ing

the using

by

Physio-Control

six

sections

and

illustrated

DESCRIPTION

paragraphs

1-1

shows

6.

LIFEPAK6isaportable

for

monitoring

controlled

synchronized

the

patient

of

this

manual

specifications;

parts

provideabrief

and DC

the

LIFEPAK6Cardioscope/Recorder

Module.

monophasic

mode,

Table

the

ECG

defibrillating

for

generated

Corporation,

performance

R-wave

and

service

and

DC

Defibrillator

provide

circuit

lists;

and

Defibrillator

1-1

lists

precision

signal

from

of

as a

procedures

Redmond,

Washington.

introductory,

descriptions; engineering

physical

description

modules.

the

general

electronic

the

heart

pulse

elective

timing

to

the

cardioversion

reference.

for the

Modules

manu

functional

maintenance

schematics.

of

Module

and

specifications

cardiac

and

for

apply

heart

or,

the

care

in

by

LIFEPAK6consists a DC

and

The

to

The module pressing

rillator

combination

carried

Defibrillator

they

the

for

may

internal

line

depleted

be

batteries

power.

cells.

cardioscope/recorder

throughaspecial

the

lock

module.

that

•

This

•

Operator

covered

using.

•

The

mable

from

one

instrument

in

LIFEPAK6should

agents

operated

should

of two Module.

are

Full

release

When

joined,

provides

area

to another.

to

be

sections

or

anesthetics.

modules:

Each

a Cardioscope/Recorder

module

is

independentofeach

charged

battery

module

slide

button

use

CAUTION

be

used

thoroughly

I and II of the

not

when

charge

is

connected

connector.

on

the

the two

of

the

system

by

authorized

familiar

be

used

the

is

right

modules

service

in

the

battery

other

modules

or

are

accomplished

to the DC

They may be

side of the DC

provide

on a

crash

personnel

with

information

manual

presence

Module

line

operated,

asaunit.

connected

in

16

hours

defibrillator separated

defib

a lightweight

cart

or

hand

only.

before

of

flam

and

by

•

Do

not

discharge

• Stay clear of

with

patient

Paddles

when defibrillating.

1-1

shorted

togetherorin

open

air

CARDIOSCOPE/RECORDER

PATIENT

CABLE

Figure

1-1

LIFEPAK

1-2

6

1-3.

General

The

stable

(Continued)

circuitry

and

highly

inahospital

recommended.

usedinthe

reliable.

LIFEPAK6is

environment.

solid

The

instrumentissuitable

Useinan

explosive

state,

temperature

for

atmosphereisnot

use

1-4.

1-5.

1-6.

1-7•

Cardioscope/Recorder

continuous

ing

or

hard

copyofthe

display

througharecorder

cardioscope/recorder

ing

the

heart

internal

5-lead

DC

Defibrillator

to

deliveracontrolled

paddles,orthrough

fully

patient's

(optional

provided or

through

FEATURES

The

cardioscope/recorder

with

AND

following

rate

shielded

heart

500

withadelivered

joules).

the

limited

FUNCTIONAL.DESCRIPTION

paragraphs

Cardioscope/Recorder

easily

described

accessible.

and

illustratedinSection

Module.

through

The

eitherano-fade

display

information

module

from

cable.

Module.

displayedonthe

also

signals

externally

TheDCdefibrillator

monophasic

The

pulse

unitaswellaswith

delivered

provideafunctional

and

DC

defibrillator

Module.

The

location

All

waveformisdisplayedoneither

which

from

at

mentationat25

on

4

is

are

drivenbyelectrical

external

25

mm/sec.

the

monitor

seconds

second

shieldedtoreject

memory

overloading

The

mm/sec.

panel,

from

real

and

signals.

recorder

the

time.

provides

By

activating

recorder

In

canbeused

radio

frequency

networks

effect,

cardioscope/recorder

cardioscope

allowing

the

usertoobtain

cardioscope.

provides

detected

for

computing

through

applied

Quik-Look

electrodes

provides

defibrillating

energy

contentof5

pulsetothe

maybedelivered

energy

pediatric,

internal,

anterior-posterior spoon

to

with

provides

for

monitor

The

and

display

paddles,

and

the

means

400

joules

the

paddles

shaped

descriptionofthe

modules.

controls

and

function

II.

the

no-fade

The

real

are

clearly

of

all

The

patient

cardioscopeorrecorder

designed

for

cardioscope

time

the

diagnostic

Delayed

labelled

controls

generated

fast

trace

docu

Record

recovery sweeps

switch

documentationisdelayedbyabout

this

for

monitoring

provides

purposes.

interference.

the

user

The

with

a

paddles.

and

are

ECG

a

circuitry

When

monitoringapatient's

the

inputiscompletely

be

obtained

adjustable

the

cardioscope

The3digit

beats-per-minute

BPM

limit

are

exceeded,anaudio

additional

a

one

volt/millivolt

availableatthe

millivolt

gain;alow

for

freezing

indicator.

from

the

volume

heart

controlisprovided

or

rate

(BPM)

alarm

features

calibration

capabilities

ECG

battery

the

ECG

wave-form

protected

DC

defibrillator.Asystole

from

high

for

recorder

monitor

from20to

alarm

are

andaone

OUT

switch

voltage

signalonthe

cannot

be

watched.

providesacontinuous

300

BPM.

are

provided.Ifthe

systemistriggered.

includedinthe

millivolt/millivoltinreal

jack

locatedonthe

(CAL)isprovidedtocalibrate

level

indicator;amomentary

cardioscope;

1-3

through

voltage

audible

Adjustable

cardioscope/recorder

back

the

patient

levelsasmay

beeper

monitoring

pre-set

The

panel;aone

with

display

low

and

BPM

following

time

the

when

of

unit:

freeze

andabattery

charging

cable,

high

limits

is

ECG

switch

TABLE

1-1

LIFEPAK

CHARACTERISTIC

CARDIOSCOPE/RECORDER MODULE

•

SIZE

• WEIGHT

•

CARDIOSCOPE

• COMMON MODE REJECTION

• CALIBRATION

(envelope)

DISPLAY

Sweep

Bandwidth

LOW BATTERY INDICATOR

Speed

(-3dB)

(CRT)

6 GENERAL SPECIFICATIONS

♦QUANTITY

OR SPECIFICATIONS

10.75"xl2"x4.5"

15

pounds

3

inch

25

mm/sec.

0.5 Hz to 30 Hz

72 dB minimum with

isolated

misbalance

Indicates

level

Internal1mV

pushbutton

instrument.

(6.8

x 4

inch

+ 1 mm

ground

at 60

approximate

of

battery.

switchtocalibrate

calibration

(27.3x30.5x11.4cm)

kg)

(7.62cmxl0.16cm)

respect

(with

Hz).

5 K

to

ohms

voltage

(CAL),

•

RATE

METER

• ECG

•

OUTPUT

INPUT

SYSTOLE

BATTERY CHARGING INDICATOR

(Heart

BEEPER

Rate)

(QRS)

3

digit

displayofthe

20

Adjustable

(audio)

1

volt/millivolt

millivolt,

Note:

1)

2)

to

readout

300

beats-per-minute

high

provides

R-wave

and

low

rate

alarms.

and1millivolt/

CSA units do not have this

ECG OUTPUT function.

Obtained

cable,

paddles.

or

0.05

Hz

through

to 100

a 5

QUIK-LOOK

Selectablebyrotary

any

one

of

nine

standard

figurations

(Paddles,

rate

AVR,AVL,AVF,V,STD).

Adjustable

acts as threshold control.

Illuminates

charging.

accomplishedin16

depleted

Volume.

when the

Full

cells.

ECG

battery

hours

for

from

(BPM).

limit

Hz.

lead

switch

in

con

I,II,III,

size

charge

control

is

for

1-4

Jan. 1979

TABLE

1-1

(Continued)

LIFEPAK

CHARACTERISTIC

CARDIOSCOPE/RECORDER MODULE

O

POWER

SOURCE

Battery

Capacity

AC

•

RECORDER

Sweep

Bandwidth

Input

Power

Speed

Power

Consumption

DISPLAY

(3

dB)

6

GENERAL

SPECIFICATIONS

♦QUANTITY

Nickel

Cadmium

Cardioscope

min.

at

-10°C.

Recorder

at 250C.

115+12

230

12

watts

30

watts

set

Paper

25

mm/sec

0.05

0.5

Monitoring,1hour

VAC,

50

during

to

maximums.

Size

(fixed)

to

100

to

40

OR SPECIFICATIONS

Battery,

Monitoring,

60

Hz

(or

Hz).

cardioscope

recording

43

mmx30m(100

Hz

(Real)

Hz

(Delayed)

14.4V

2.5

1.5AH

hours

min.

optional

monitoring.

with

heat

ft.)

e

FREEZE

DEFIBRILLATOR

c

SIZE

e

WEIGHT

©

WAVEFORM

•

OUTPUT

O

CHARGE

•

LOW

SWITCH

(envelope

ENERGIES

TIME

BATTERY

MODULE

(Delivered)

INDICATOR

Momentary

freezinq

CRT.

19.25x12x4.5

(48.9x30.5x11.4

19.25

Monophasic

pushbutton

QRS

complex

inches

switch

observed

cm)

pounds

(8.6

kg)

Pulse,5milliseconds

(Edmark)

5,10,20,30,50,100,2-0,300,400

joules

Internal

joules

(Optional

paddles:

(Higher

energies

500

joules).

5,10,20,30,50

cannot

chargedordelivered).

To 400

seconds.

(Optional)to500

seconds.

Indicates

level

joules

approximate

of

battery.

in

less

joules

than 10

in

voltage

for

on

be

12.5

9

—^—^————^___—___

OUTPUT

Electrode

Cord

PADDLES

Length

Size

32

cm2

Extended

1-5

Length

10

feet.

Jan.

1979

TABLE

1-1

(Continued)

LIFEPAK6GENERAL

CHARACTERISTIC

DEFIBRILLATOR MODULE

• BATTERY CHARGING INDICATOR

• POWER SOURCE

Battery

Capacity

AC

Input

• CHARGE CONTROLS

Power

Consumption

SPECIFICATIONS

♦QUANTITY

Illuminates

charging.

OR

when

Full

SPECIFICATIONS

battery

accomplishedin16

depleted

Nickel

Using

discharges

15-400

at -10OC.

115+12 230

25

watts

250

Nine

presetting

energy.

initiates

preset

pushbutton

automatic

cells.

Cadmium

battery

minimumat25°C.

joule

VAC,

watts

50

when

during

position

Pushbuttononfront

automatic

level.

chargingtopreset

Battery,

pak,

discharges

60

Hz)

power

rotary

the

desired

Paddle

(on

APEX

hours

25-400

Hz

(or

on.

defib

charging

paddle

is

charge

for

12V

1 AH

joule

minimum

optional

charge.

switch

for

discharge

mounted

initiates

is

panel

to

level).

• ISOLATED OUTPUT

• DISCHARGE CONTROL

• DEFIBRILLATOR SYNCHRONIZER

Synchronized

pulse

version timed to occur on

the

R-wave which follows

rillate command.

Sync

Sensitivity

for

first

Indicator

defibrillating

elective

cardio

patient-generated

defib-

Control

Defibrillator

isolated.

Pushbutton

both

accidental

on

paddlesinseriestoprevent

control

internal

Marker

sync

on

trigger

pushbutton

output

discharge

discharge.

panel

paddles.

CRT

trace

point.

switch

for

will

systoletoindicate

ECG size control

control.

acts as threshold

electrically

controls

Pushbutton

use

identifies

The

flash

only

SYNC

on

in

synchronization

1-6

Jan.

1979

TABLE

LIFEPAK 6 GENERAL SPECIFICATIONS

1-1

(Continued)

CHARACTERISTIC

DEFIBRILLATOR MODULE

©

DEFIBRILLATOR

Sync-Defib

GENERAL

Line

Cord

Switches

ENVIRONMENTAL

Unless

met

otherwise

under

the

SYNCHRONIZER

Mode

CONDITIONS

stated

following

Control

the

storage

(Cont'd.)

performance

and

operating

♦QUANTITY

Pushbutton

to

change

to

Defib

Each

ten

foot

low

capacitance

hospital

Separate

vided for monitor and defibrillator

modules.

OR SPECIFICATIONS

switch

mode

or Defib to

Module

instantly

is

provided

special

duty,3prong

ON-OFF

can

be

Sync.

low

leakage,

cable

with

connector.

switches

depressed

from

with

special

are

requirementsofLIFEPAK6shall

conditions.

Sync

pro

be

•

ATMOSPHERIC

•

RELATIVE

•

VIBRATION

SHOCK

requirements

•

DROP

operator

(capableofmeeting

TEST

drop).

•

PADDLE

operational

TEMPERATURE

HUMIDITY

(without

or

DROP

PRESSURE

after

patient

TEST

and

(capable

safety

RANGE

ODerating

shock).

resulting

hazard

in

during

of

meeting

requirements).

400 mm

0

to

MIL-STD-810C,

cedure

V.

30

sine,

direction)

mutually

1

concrete floor on each axis

(6 1

FDA-MDS-021-0001, fifth

paragraph

0°C to

-30°Cto+65°C

Hg

95%

VIII,

g's,

18

1/2

foot

drops).

Meter

to

772

mm

Hg

(non-condensing)

11

- 1

impact

along

Method

Figure

milliseconds,half-

514.2,

514.2-6,

shocks(3in

each

perpendicular

drop

Benchmark

(45.7

(3.281

4.3.2.

55°C

Operating

Storage

of

axes.

cm)

draft,

three

feet)

on

Pro

Curve

each

a

per

♦

Specifications

specifications

subjecttochange

at

25°C.

without

1-7

notice.

Unless

otherwise

Jan.

1979

stated

all

DC

Defibrillator

defibrillator

are

Module.

described

The

locationofall

and

illustratedinSection

controls

for II.

the

1-9

FeaturesontheDCdefibrillator

the

stateofchargeofthe

voltage

200

charging

hiqh

the

discharged

Look

available

positions

capableofbeing

Synchronized

level

indicator;atest

joulesorgreaterisdeliveredtothe

indicator.Acharge

voltage

capacitor

paddlesorthrough

defibrillating

from

through

from

ranging

the

theDCdefibrillator

from5to

rechargedto400

Cardioversion.

provideasynchronized pulse

milliseconds

atrial

using

is

the

causes

deliveryofthe

after

flutterorother

the

R-waveasthe

deliveredata

ECG

cycle

where

the

time

electrical

charge

charging

chestofa

internal,

trigger

marker

arrhythmias.AsshowninFigure

initiating

which

include:aready

storage

load

storage

pulse.Oncommand,

circuitry

patient,

spoon

400

joules

joulesinless

The

functionofthis

pulsetothe

defibrillating

pulse

signal,

avoids

shock

flasher

capacitor;alow

indicator

test

which

load;

andabattery

capacitoristhe

relays

and

the

resultant

through

shaped

canbeadjustedinnine

delivered.

the

paddles.

The

indicating

battery

will

flash

sourceofthe

disconnect

external

The

instrument

than10seconds.

circuitisto

LIFEPAK6.This

pulseatapoint

for

converting

the

vulnerable

may

cause

atrial

fibrillation,

1-2,

defibrillating

T-wave

portion

ventricular

it

_

pulse

is

Quik-

energy

discrete

is

trigger 20

by

pulse

of

fibrillation

ll.£

PAI

FIGURE

Pl.'SHBl'TTt

DEPRESSED

1-2

TYPICAL

ECG

DEFIBRILLATING PULSE

TRIGGERED BY DEFIBRILLATOR

SYNCHRONIZER CIRCUIT

t

TIME

WAVEFORM

SECTION

OPERATION

II

rthe

2-1.

2-2. CONTROLS AND INDICATORS

1)

2)

3)

GENERAL

This

and DC Defibrillator Modules.

The

and

The

shown

to or

of each control or indicator.

ECG listing

and

The in

or

of

section

and

provides

following

indicators

controls

in

the

corresponding

indicator

Figure

2-2

recording.

in

briefly

controls

Figure

corresponding

indicator

each

control

provides operator

paragraphs

on

and

indicators

Figure

2-1.

placarded

provides

Each

Table

describes the

2-3.

2-2.

and

indicators

Each

placarded

or

LIFEPAK6Cardioscope/Recorder

listing

the

item

control

listing

indicator.

information

service

for

provideabrief

for

the

Each

control

in

Table

nomenclature

rear

The

nomenclature

panel

is

keyed

table

function.

in

lists

for

the

and

indicatoriskeyed

Table

and

procedurestoproperly

the

LIFEPAK6Cardioscope/Recorder

descriptionofthe

and

DC

Cardioscope/Recorder

and

indicatoriskeyedonthe

2-1.

and

view

on

the

DC

2-3.

and

the

The

table

briefly

of

the

figure

describes

connections

to

item

placarded

Defibrillator

The

table

briefly

lists

describes

lists,

the

corresponding

Module

on

the

operate

controls

Defibrillator.

Module

the

for

nomenclature

are

figure

the

control

the

are

figure

control

functions

external

shown

to

functions

2-1

FIGURE

2-1

CARDIOSCOPE/RECORDER MODULE CONTROLS AND INDICATORS

2-2

TABLE 2-1

.-JpN

FIGURE

KEY NO.

1

2

3

4

CARDIOSCOPE/RECORDER

CONTROL

INDICATOR

CARDIOSCOPE

POWER

ECG

FREEZE

QRS VOL

1

mv

OR

SIZE

(Push)

MODULE

CONTROLS

.power

AND

INDICATORS

FUNCTION

CRT

display

Pushbutton

(no

switch

fade)

for

applying

to instrument.

Used

to

the

signal

fed

to

the

recorder.

increase

adjust

amplitude.

simultaneously

amplitude

cardioscope

Turn

clockwise

(vertical)

and

to

Depress knob to freeze trace

on

cardioscope.

current

trace.

Release

for

Used to adjust sound volume

of

systole

Depress

Injectsapositive

strip

when

corresponding

depressed.

presetting

of

input

beeper.

and release

Convenient

ECG

SIZE

ECG.

knob.

going

to 1 mv

in

absence

pulse

for

/'jJP^

5

6

RECORDER

DELAY/OFF/REAL

Records

sensitive

Toggle

ON/OFF.

recorder

corded

delayed.

routine

right

ECG

on

standard

paper.

switch

controls

Switch to left turns

on:

is

information

four

(4)

seconds

DELAY record

monitoring.

turns

recorder

informationiscurrent

most

current

scope).

diagnostic quality and

for

diagnostic

as 12

lead

Real

ECG

trace

on

record

procedures

and

stress

heat

recorder

is

Switch

on;

(matches

cardio

is

of

is

re

for

to

used

such

testing.

7

BATT

LEVEL

(AC/DC

Level

battery

however,

should

power

the

POWER switch ON; marker in

Model

indicator

Only)

wil1

Battery

indicate

voltage continuously,

the battery indicator

be

observed

when

the

cord is disconnected from

wall

outlet

and

with

the

AC

2-3

TABLE

2-1

(Continued)

'/^\

FIGURE

KEY

NO.

7

(cont'd.)

8

9

10

CARDIOSCOPE/RECORDER

CONTROL

INDICATOR

BATT

ECG

PATIENT

LEVEL

CHG

LEAD

OR

(Continued)

SELECT

CONN

MODULE

CONTROLS

AND INDICATORS

FUNCTION

green

voltage half

depleted

charged

necting

wall

(AC/DC

will pak

Rotary desired

half

indicates

adequacy,

indicates

battery

in 16

power

outlet.

Model

illuminate

is

charging.

switch

paddles

patient cable

II,

III,

AVR, AVL, AVF and

Connections

patient

cable.

low

hours

cord

Only)

for

leads;

for

battery

marker

battery.

can

be

by con

to

Indicator

when

input

six

battery

selecting

STD,

(6)

in

red

fully

grounded

or

I,

V.

A

11

12

13

QRS

HEART

ALARM

RATE

LIMITS

Indicator

sensed.

Digital from

20 to 300

minutes

dates

Switches

LOW

heart

Violation

will result in a continuous audio

alarm. To

control

flashes

display of QRS

beats-per-

(BPM).

ewery

for

rate

of

silence

knobs

Heart

3.5

seconds.

selecting

limits.

these

to

when QRS

rate

preset

alarm

OFF.

rate

up

HIGH

limits

turn the

and

^\

2-4

Ksoumn

CAimo*—rerr TO INSTRUCTION

MANUAL BEFORE

CONNECTING

ACCESSORY

El

|;

CSA

Figure

units

I

FIGURE

KEY NO.

1

2

*Note:

2-2

CARDIOSCOPE/RECORDER

TABLE

CARDIOSCOPE/RECORDER

CONTROL

INDICATOR

ECG

POWER

do not

OR

OUTPUT

CORD

*

have

this

2-2

MODULE

ECG

output

MODULE

REAR

ECG

REAR

PANEL

output

monitoring

Connect

function.

PANEL

FUNCTION

jack equipment.

to

wall

for

external

receptable.

2-5

Jan.

1979

FIGURE

2-3

DC

DEFIBRILLATOR

MODULE

2-6

CONTROLS

AND

INDICATORS

TABLE

2-3

J^*\

FIGURE KEY NO.

1

2

3

4

DC

DEFIBRILLATOR

CONTROL

INDICATOR

STERNUM

APEX

Paddle

Charge

ENERGY

MODULE

OR

Paddle

Indicator

SELECT

CONTROLS

AND

INDICATORS

FUNCTION

Defibrillating

discharge

Defibrillating

Discharge

TO CHARGE Pushbutton, and a

Charge

Light cycle,

flashes has

90%

Rotary

energy

10,

400

500

Indicator.

flashes

steady

again when

bled

down to approximately

of

selected

switch

levels

20,

30,

joules

joules).

electrode

pushbutton.

electrode

Pushbutton,aPUSH

during

light

charge

when

instrument

energy

with 9

level.

discrete

selectable;

50,

100,

delivered.

200, 300,

(Optional

with

with a

ready,

5,

5

CHARGE

Pushbutton

Momentary

defibrillator

level. If ENERGY

is

changed

is

charged,

"dumped"

necessary.

6

POWER

Pushbutton

illuminates

7

8

500J

Push w/CHARGE

(Not

INTRNL

DISCHG

(Optional)

shown)

PADDLE

Momentary

vate

charging

Momentary

defibrillator

paddles

BATT

9

LEVEL

Battery

indicate

tinuously,

indicator

the

AC

from the wall outlet and with the

POWER

Pushbutton to charge

to

preselected

SELECT

after

charge

and

switch.

when

Pushbutton

pushbutton

are

Level

instrument

will

recharge

power

to

500

when

internal

utilized.

indicator

Indicator

to

joules

to

battery voltage con

power

(1)

however,

should

cord

switch

the

be

observed

is

disconnected

ON;

level

be

is

on.

acti

only.

discharge

will

battery

when

indicator

2-7

DC

DEFIBRILLATOR

TABLE

2-3

(Continued)

MODULE CONTROLS

AND

INDICATORS

FIGURE

KEY NO.

(Cont'd)

10

11

CONTROL

INDICATOR

BATT

SYNC

LEVEL

CHG

OR

(continued)

FUNCTION

will

marker

be

connecting

grounded

Indicator

being

Momentary

select

ton

with each

defibrillate mode,

indicate

in

battery

in red half indicates low

voltage

battery.Adepleted

fully

chargedin16

wall

battery

green

half

adequacy,

AC

power

outlet.

indicates

condition,

indicates

battery

hours

cord

battery

charged.

pushbutton

synchronized

will

illuminate

QRS.

To return to

switch

mode.

and

(asynchronous)

depress

button

again.

marker

to

But

flash

can

by

is

to

OFF

Defibrillatorisautomatically

in

defib mode when instrument

is

turnedonand

returns to defib mode after

discharge

connected from monitor.

or

automatically

if

unit

is

dis

13

14

15

16

12

Discharge

Pushbutton

Test Load Indicator

Test

Power

Paddle Connector

Load

Cord

Discharge

paddles

Pushbuttons

must

be

depressed

on

both

simultaneouslytodischarge

defibrillator.

be

delivered

ment

Indicator

or

test

less

50

Metal

energy

is

fully

flashes

greater

load.

than

ohm

is

100

defibrillator

contacts

pulse

Connecttowall

Connector for external

internal

paddles.

Energy

unless

the

will

instru

chargedor"ready".

when

discharged

Will

not

joules

for

from

paddles.

200

into

flash

is

delivered

test

load

receiving

receptacle

or

not

joules

when

2-8

Jan.

1979

DC

DEFIBRILLATOR

TABLE

2-3

MODULE

(Continued)

CONTROLS

AND

INDICATORS

FIGURE KEY NO,

17

CONTROL

INDICATOR

Power

LP6

Receptacle

Monitor

OR

for

FUNCTION

Connector

Cardioscope/Recorder

when

operatedorcharging

batteries from one power source

both

for

connecting

units

are

Module

to

be

the

line-

2-9

2-3.

OPERATING INSTRUCTIONS

The

following

the

LIFEPAK6cardiac

cautions

•

while

This

Operator

covered

The

agents

paragraphs

operating

instrumentisto

should

in

SectionsIand

LIFEPAK6should

to

anesthetics.

provide

care

be

instrument.

the

CAUTION

be

thoroughly

not

brief

operating

instrument.

used

by

authorized

familiar

II

of

this

be

used

in

Observe

with

service

the

presence

instructions

the

following

personnel

information

manual

only.

before

of

flammable

for

using

2-4.

• Do not

•

Stay

•

Do

•

Keep

(wet

the

charge.

• Do energy

If

diathermy

Module

DC

defibrillator

separated

of

the

and

electrical

When the modules are

exposed.

used

only to

signal

the

synchronized

recorder

present

discharge

clear

not

of

discharge

defibrillator

or

dry)

presentahazardous

paddle

not

fibrillation

Connection.

again

defibrillator.

electrodes

operate electrical

prior

module

by

connections

These exposed

transfer

from the DC

mode,

to the DC

at these

contacts.

with

patient

paddles

when

defibrillator

paddles

and

the

defibrillator

fields

occurs

to

turning

The

cardioscope/recorder

throughaspecial

pressing

The

such

where

the

slide

between

separated,

contacts

the

paddle

defibrillator

the

trigger

defibrillator.

shorted

defibrillating.

into

clean.

user

in

the

as

diathermy

on

defibrillator.

lock

release

connector

the

electrical

do

not

pickup

to the cardioscope/recorder or

pulse

No

together.

open

air.

Paddles

electrical

during

presence

those

two

represent

of the low

from

dangerous

defibrillator

generated

is

in

module is connected to the

slide

button

makes

modules.

slide contacts are

the

covered

with

pathway

of

strong

by

use,

connector.

both

a safety

cardioscope/

voltages

turn off

on the

the

Refer

level

between

diathermy.

right

mechanical

to

hazard

ECG

are ever

jel

dis

high

They may

side

Figure

and

in

be

2-4

are

2-5.

1)

2)

Input

For

grounded

To

to a operate

power

Power,

AC

operate

three

cord

AC or DC

operating

power

source.

AC/DC

grounded

AC/DC

instrument

from

Operation.

instrument,

connect

Do not use

instrumentonAC

power

on

the

three

2-10

adapter.

input

source.

internal

grounded

power

cord

power,

Do not use

battery,

outlet.

toathree

connect

adapter. disconnect

Turn

POWER

power

switch

Jan.

cord

To

the

1979

Slide

Connection

Figure

2-4

Module

Release

Connection

(,.

2-5

'

2-6.

1}

2)

3)

4)

InputPovier^M^^L^m^^

to

ON

and

observe

the

"green"

Hot.:

C^c^Re^^

^^^^TI^^

Refertoparagraph

ational

zone

When

instant

rechargedin16

checkout.

^fused!^

be

connected

Attach Turn

Depress

either

ECG

LEAD

POWER

the

BATT

LEVEL

which

indicates

is

connected

hours.

2-10

for

ui

•

4-0

^^"cSySSS^Tnd

together.

patient

SELECT

pushbutton

cable

switch

switch_on1_______

(Continued)

^

adequate

operatui

DATTFNT

or

paddles

to

position

CAUTI

b^^^

oakery

t<>

the

AC

input.

service

CONN

to

which

If

QUIK-LOOK

DC

dSfltrlll.tor

patient.

desired.

he

in

power^the

includes

an

oper-

paddlesa)e

,™st

when not in

5)

-^J22t-^Ji^

if

recorder

switchtothe

use.

monitoringisdesired,

position

madeinthe

• a -^

desired.

DELAY

switch

2-11

,ri<»st

adjust

position.

the

recorder

DELAY/REAL

.pfihril

2-6.

Cardioscope/Recorder

Module

(Continued)

6)

7)

8)

9)

10)

Depress

a

10mmsquarewave

cardioscope.

Adjust

on

Adjust

Note:

If

HIGH and LOW limits.

Note:

If

CAL

momentary

ECG

SIZE

controltoobtain

cardioscope

SYST

When

each

useofthe

Audible

exceeded.

limit

desired,

For

patient

to

the

combination with LIFEPAK 6 has been evaluated for fire

and

shock

and/or

VOL

controltodesired

volumeisadjusted,

QRS

complex.

ALARM

alarm

adjustments

connect

safety

ECG

OUTPUT

hazard.

pushbutton

switch,

displayonrecorderora

desired

recorder.

volume.

"beeper"

LIMITSisdesired,

is

continuous

To

turn

off

alarm,

beyond

external

do

not

jack

the

monitoring

CAUTION

connect

unless

adjust

when

accessory

preset

move

patient's

equipment

accessory

adjust

ECG

convenient

patient

should

the

limits

the

HIGH

rate.

equipment

SIZE

control

displayonthe

generated

coincide

controls

and/or

to

equipment

are

the

in

with

ECG

for

LOW

for

display

proper

OUTPUT

O

jack

11)

2-7.

1)

2)

3)

Depress

is

desired

Note:

DC

Defibrillator

operating

using

2-10

Press

Note:

Select

Depress

front

Note:

FREEZE

If

FREEZE

recording

depressed

to

real-time

information will be recorded and the unit then returns to

DELAY

instructions

the

paddlesisdiscussedinparagraph

for

operator

POWER

If

operating

indicator

desired

and

panel

If

the

w/CHG

CHARGE 3

switch

to be studied.

while

mode.

Module.

on

switchisdespressed

continues

recordinginDELAY

until

for

service

1

release

or on

switch

on

to

insure

energytobe

CHARGE

APEX

(optional)

pushbutton

pushbutton.

internal

paddle.

front

The

to

500

switch

panel;ifthe

while

uninterrupted.

FREEZE

is

released.

following

LIFEPAK6DC

includinganoperational

on.

adequate

delivered

3

Button

battery

with

pushbutton

joulesisto

must

be

pushed

recording

If

mode,

paragraphs

Defibrillator.

2-6.

will

power,

voltage.

ENERGY

switch

be

ECG

signal

FREEZE

recording

At

that

on

in

switch

time,

provide

Monitoring

Refer

checkout.

illuminate.

check

SELECT

either

delivered,

simultaneously

to

BATT

the

cardioscope

REAL

mode,

is

reverts

frozen

brief

paragraph

LEVEL

2

on

switch.

defibrillator

500J

with

PUSH

the

Indiscriminate

cause

is

cardiac

not

recommended.

use of

damage.

CAUTION

energy

Automatic

(See

Operators

2-12

settings

selection

above

Instruction

400

of

maximum

joules

Manual).

may

energy

Jan.

1979

2"7-

DC

Defibrillator

Module

(Continued)

4)

5)

6)

Place

DC

flashing

fully

Note:

Depress

shock.

paddles

firmlyonpatient's

defibrillatorisreadytofire

and

glows

charged

Once and

is

bleed

level,

instrument

If

changed

automatically

instrument to

both

to

the

ready

down.

the

Stay

paddle

steady.

preset

defibrillator

charge

to

CHARGE

must be

ENERGY

while the

clear

level.

indicator

fire.

When

SELECT

dumped.

defibrill

of

discharge

If

the

indicator

recharged

defibrillator

patient

chest.

when

DC

defibrillator

has

charged

stops

not

fired,

charge

switch

It

is

ate at a different

CAUTION

when

pushbuttons

red

to

flashing,

the

reaches

will

is

begin

before

inadvertently

is

charged,

necessary

defibrill

simultaneously

CHARGE

will

the

desired

the

charge

90%

of

to

flash

using.

to

recharge

setting.

ati

indicator

not

fire

instrument

will

the

or

the

ng.

stops

unless

level

slowly

selected

and

the

intentionally

charge

the

for

is

counter-

<r

7)

8)

9)

If

repeat

and

repeat

To

dump

on

defibrillator

For

internal

the

instrument

separate

and

the

A.

To

illuminate.

B.

Select

(Delivered

internal

Note:

C.

Depress

Defibrillatorisready

and

D.

Depress

counter

as

above.

charge

from

connector

defibrill

and

front

defibrillation

(the

the

ate.

desired

energy

paddles).

Instrument energies

and

release

glows

steady.

INTRNL

shockisnecessary,

turn

off

defibrillator,

panel.

LIFEPAK6cardioscope/recorder

defibrillator

for

the

Button

the

external

moduletoexpose

internal

Press POWER

energytobe

is

limited

will

with

internal

delivered

not

charge

depress

light

paddles

(T)

to

5,

paddles

depress

will

paddles

is

switchtoon.

with

10,

20,

to

nor

deliver

connected.

CHARGE©pushbutton

to

fire

PADDLE

DISCHG

when

switchonfront

CHARGE

then

(5)

pushbutton

POWER

extinguish.

are

module

the

connected.

(T)

disconnected

must

paddle

switch

connector)

Button

ENERGY

30

switchonfront

indicator

and

higher

panel

SELECT

50

for

(?)

joules

stops

countershock.

panel.

from

be

will

switch.

with

flashing

r2-8.

E.

Synchronized

operating

1)

Connect

If

repeat

and

repeat

the

countershockisnecessary,

as

above.

Cardioversion.

instructions

Cardioscope/Recorder

for

The

following

the

LIFEPAK6synchronized

and

2-13

depress

paragraphs

Defibrillator

CHARGE

(£)

pushbutton

provide

cardioversion.

Modules

brief

together.

2-8

Synchronized,

Cardioversion

(Continued)

2)

3)

4)

5)

6)

7)

Turn

Connect

on

POWER

Defibrillator

patienttopatient

Do

not

electrive

buttons

movementofpaddles

defibrillator prematurely. .

Press

Adjust cardioscope

will

SYNC

ECG

beep

pushbutton

SIZE

(CRT).

with

getasignal

Set

desired

Depress

front

panel

energytobe

and

release

or on

switchonboth

will

use

with

come

on

defibrillator

cardioversions.

are

depressed,

switch

control

marker.

SYNC

(It

until

pushbutton

sufficient

delivered

CHARGE©pushbutton

APEX

paddle.

Cardioscope

in

manually

cable

could

and

CAUTION

paddlesasECG

Once

artifact

cause

on.

Button

marker

may

be

necessarytomove

amplitude).

with

and

Defibrillator

triggered

set

LEAD

the

discharge

from

poor

synchronizertofire

will

blip

occursonECG

switch

will

mode.

SELECT

pickup

switchtolead

push

contact

illuminate.

flash

the

ENERGY

SELECT

switch

either

Modules

for

or

complex

and

SYSTOLE

electrodes

(?)

switch.

on

defibrillator

II

on

sound

to

2-9.

2-10.

To

discharge,

lator

milliseconds

After

rillate

the

button

OPERATOR

The

daily

stylus

fires

discharge,

mode.

defibrillator

switch

following

operational

adjustment

Operational

procedures

Table

DC

ronized

These

2-6

Defibrillator

cardioversion.

procedures

depress

on

the

of marker. Release.

on.

SERVICE

paragraphs

Checkout.

for

providesanoperational

scope/Recorder

tests

checkout

should

procedures

be

activitytocopy

tenance

aid.

both

discharge

the

defibrillator

If

repeat

in

When

checlou'.

and

synchronized

the

SYNC

button

provide

replacement.

Tables

the

cardioscope/record-r

Defibrillator

mode

is

illuminated,

npo*

''^unvj,--

2-4

and checkout

modules

will

and

DC

performedasroutine

them

connected

determine

whetherornot

Defibrillator

are

presentedintabular

and

use

themasan

buttons

automatically

cardioversionisrequired,

again

•t

2-5

and

by

depressing

r

service

replacement

provide

hold

until

will

fire

within

returnstothe

the

synchronizer

procedures

and

operational

-ndDCdefibrillator

for

Cardioscope/Recorder

together

nodules

maintenance.

for

verification

the

function

form

ongoing

LIFEPAK6Cardio

normally.

The

operational

to

allow

preventative

defibril

20

defib-

place

SYNC

recorder

push

is

on.

including

checkout

modules.

of

synch

These

the

using

main

and

<*%

2-14

TABLE

CARDIOSCOPE/RECORDER MODULE OPERATIONAL CHECKOUT

2-4

PROCEDURE

1.

Turn

ition and SYS VOL control

counterclockwise.

2.

Attach

CONN

3. Recorder switch should be in off

ALARM

LIMITS

patient

connector.

to

OFF

cable to

pos

PATIENT

position.

4. Set ECG LEAD

STD

position.

5.

Push

POWER

SELECT

button

switch

on.

to

RESULTS

Verify

on

ment, observe BATT level

cator

age

With

power

Battery

illuminous trace appears

cardioscope.

for

adequate

with

power

source,

CHG

cord

(If

battery

cord

connected

verify

indicator

AC/DC

disconnected.

that

is

ated.)

instru

indi

volt

to the

illumin

6.

Depress1mV

pushbutton

7.

Set

Recorder

8.

Depress1mV

pushbutton

9.

Adjust low ALARM off

position.

10.

Set

ECG

position

LEAD

1.

(PUSH)

switch.

switch

(PUSH)

switch.

LIMITS

SELECT

momentary

to REAL

momentary

from

switch

to

Squarewave

on

cardioscope.

if necessary.

Verify

replacement

to

paragraph

A)

Verify

display

on

B)

Adjust

is

heard

pulse

should

Adjust

recorder

starts.

is

required,

2-12.

thatasatisfactory

(pulse)

recorder.

SYS

with

VOL

is

so

each

appear

ECG

If

refer

obtained

that

lmV

signal.

Verify

activated.

A)

that

Verify

the

audio

interference

alarm

is

on cardioscope trace with 4 or

5 lead

of white lead and black lead

wires

scope

cable.

Place snap ends

together-trace

should

stabilize.

on

size

paper

beep

is

present

cardio

2-15

TABLE

CARDIOSCOPE/RECORDER MODULE OPERATIONAL CHECKOUT

2-4

(CONTINUED)

PROCEDURE

(Continued)

10.

11.

Return ECG

to STD.

12.

Turn Recorder DELAY/REAL

switch

to

LEAD

DELAY.

SELECT

switch

RESULTS

B)

RepeatAabove

SELECT

Place

and trace

stabilize.

C)

RepeatAabove

SELECT switch to

Place and

trace

stabilize.

Verify recorder starts and trace

appears

Depress

switch

that

on

cardioscope

on

the

switch

snap ends of white lead

red

lead

on cardioscope

snap

red

lead

on cardioscope

within one and 1/2

lmV

(PUSH)

several

the

squarewave

ECG

paper

with

to position

wire

ECG

LEAD

together

should

with

ends

wire

ECG

position

of

black

together

LEAD

should

second.

pushbutton

times

and

verify

pulse

is

appears

recorded

within5seconds.

II.

-

III.

lead

-

13. Set Recorder switch to OFF.

14.

Press

POWER

switch

off.

2-16

DC

DEFIBRILLATOR

TABLE

MODULE

2-5

OPERATIONAL

CHECKOUT

PROCEDURE

Note:

1.

3.

4.

Do

not

lubricate

on

test

to

Verify

are firmly seated in stor

age

Push

on.

Set

switch

unlubricated

area.

POWER

ENERGY

Depress

button

load

insure

delivery of

Q

SELECT

to maximum

CHARGE

switch.

(3)

plates

switch

paddles.

paddles

(?)

rotary

energy.

push

to

prevent

energies.

to

Use

RESULT

firm

contact

arcing,

Verify

uminates.

observe BATT level indicator for

adequate

power

source,

CHG

Verify until

dicator

CHARGE also

at

pitting

that

(If

battery

cord

verify

indicator

fully

is

indicator

flashes

time

of

discharge

of

paddles,

button

AC/DC

indicator

instrument,

capacity

disconnected.

connected

that

is

charged

on

steady.

until

the

illuminated.)

on

panel and

on APEX

fully

and

to

power

battery

then

Verify

ill

with

With

flashes

in

paddles charged.

With unlubricated

firmly

in

both

buttons

on

storage

paddle

simultaneously.

test

load

area.

DISCHARGE

paddles

plates

Depress

Verify

than 10 seconds.

Verify

flashes with discharge.

Note:

charging

TEST

Because of heat created

at time of discharge

into test load, do not

repeat

rillator more than ten

400

every

temperature.

time

Load

Indicator

testingofdefib

joules

hour

discharges

at room

is

less

2-17

TABLE

CARDIOSCOPE/RECORDER AND DC DEFIBRILLATOR OPERATIONAL CHECKOUT

2-6

PROCEDURE

Note:

1.

The

Cardioscope/Recorder

connected

Push POWER switch, on

cardioscope/recorder

to

on.

Set

ECG

LEAD

to

PADDLES.

Connect

simulator

CABLE connector on cardio

scope/recorder

patient

and

together

SELECT

cabletoECG

to

PATIENT

module.

for

module,

switch

and

the

following

RESULTS

DC

Defibrillator

operational

A.

B.

C.

Observe

modules

Verify

paddle

trace

Repeat

paddle

Place

Verify

trace

ppears.

thatbytouching

face,

shows

A above with the other

face.

paddle

that the interference

on

cardioscope

must

checkout.

the

cardioscope

interference.

faces

cardioscope

for

be

one

together.

disa

ECG

signal

4.

Push POWER defibrillator, to

Depress

switch.

6. Set ENERGY SELECT switch to

200

joules

7.

With load

depress

paddles plates

CHARGE

switch,

SYNC

pushbutton

or

firmly

in

both

paddle

buttons

on DC

on.

above.

on

test

storage

area,

DIS

simultaneously.

Verify

defibrillator

inates.

Verify on

indicator is

PWR

button

that

the

R-wave

Verify

on the next R-wave and that the

test load

Following

verify

returns

(cardioscope)

illuminated

defibrillator

indicator

energy

that the instrument

to

indicator

front

panel

marker

discharge,

defibrill

illum

blip

and

discharges

flashes.

ate

mode.

on DC

appears SYNC

'**%

2-18

w

'

2-11.

1)

2)

3)

4)

5)

2-12.

Recorder

follows.

Pull

Remove

out

old

Replace

off the

Pull

out

Press

DELAY

POWER

position

with

Figure

Paper

paper

new

roll

in a counterclockwise

short

pushbutton

2-5

Replacement.

carrier.

roll.

paper

lengthofpaper

and

ECG

recorderisrunning,

rubber

Recorder

proceed

Note:

roller.

Stylus

as

follows:

The

special

kit)

information,

stylus.

Paper Replacement

stylus

willberequiredinthe

Recorder

Paper

Replacement

RefertoFigure

roll.

switchtoon.

LEAD

guide

willbepulled

Note

that

direction.

and

close

Set

SELECT

paper

switchtoSTD

over

all

throughbyrubber

and

Adjustment.

replacement

tool

the

following

refertoinstruction

2-5

and

recorder

paper

Recorder

carrier.

switch

position.

metal

sheet

rollers

RefertoFigure

(partofthe

procedure.

accompanying

proceed

paper

as

must

to

While

and

under

roller.

2-6

replacement

For

more

replacement

come

and

detailed

2-19

May

1978

2-12.

Recorder

Stylus

Replacement

and

Adjustment.

(Continued)

1)

2)

3)

4)

5)

6)

7)

Press

Lift

Using

screwsatbaseofstylus

Remove

Insert

insertion tool.

Replace

and

in

stylus

adjust

Adjust

stylus through

the

stylus

Place

switchtoREAL

switch.

POWER

out

paper

the

stylus

new

stylus

paper

insure

contact

stylus

with

does

the

middle

Stylus

replacement

the

stylus,

life.

ECG

LEAD

Observe

switch

off.

carrier

replacement

with

not

ring

for

fingers.

and

tighten

loadonpaper

moves

the

paper

touch

Heat

the

stylus

controlasnecessary. tool,

hole

the

SELECTOR

and

deflection

located

desired

let

and

recorder

remove

and

paper

tool,

turn

loosen

counterclockwise

the

two

carrier.

outofthe

when

paper,

tension

adjust

way

paper

lift

screw

the

under

line.Alight

switchtoSTD

run

and

compare

loadtoexpose

the two

outside

Close

of

load

the

clockwisetoincrease

stylus the

(lmV)

while

paper

the

carrierisshut.

paper

Using

heat

paper

line

position.

depressing

with

outside

until

alien-head

carrier

writing

load

the control

carrier

will

below.

edge

carrier

other

near

provide

the1MV

baseofstylus.

alien-head

loose.

screws

carefully

endofthe

potentiometer

Set

with

and

comes

If

the

and

pressure.

the

base

longer

Recorder

(PUSH)

of

/^llkN

8)

ACCEPTABLE

(NOMINAL)

Adjust

Note:

stylus

To

tension

insure

pressure

response

AHA

to

4-6

AHA

TOO

LOOSE

screw

frequency

if

necessary.

response,

grams

specifications.

usingagram

2-20

Repeat

adjust

gauge

_r

TOO TIGHT

step7above,

the

stylus

and

check

'**%

STYLUS

CONTROL

HEAT

FIGURE

2-6

STYLUS

REPLACEMENT

AND

ADJUSTMENT

STYLUS

OUTSIDE

HEAD

SCREWS

TENSION

ALLEN

SCREW

r

2-21

Jan

1979

SECTION

III

0

3-1.

3-2. FUNCTIONAL

INTRODUCTION

This

section

or

first.

followed

The

view diagrams

cussion,

reading

section

in

LIFEPAK6Cardioscope/Recorder

is

block

The

LIFEPAK6block

of

the

NOTE:

in

this

values)

This

a

different

In

any

would

change

tion at the rear of this

CIRCUIT

providesadetailed

divided

diagram

subsequent

by the DC

DESCRIPTION

system

of

the

to allow for

circuit

In

section

from

would

case,

carry

into

description

Defibrillator

diagrams

operation

major

rare

occur

the

circuits

examination

descriptions.

instances

may

the

configuration

only

revision

the

engineering

applicable

information

DESCRIPTION

descriptionofthe

three

parts

major

of

are

of

in,

the

differ

if

the

than

each

presentedbyCardioscope/Recorder

module.

Figures

terms

are

slightly

the

configuration

notedinthe

manual.

circuits

and

DC

Defibrillator

parts.

module

of

provided

of

the

in-text

that

PCB

board

one

schematicinSection

Change

A

brief

of

the

3-1

and

its

two

later,

circuits

schematics

(e.g.,

the

user

in

question

presented

and

Information

general

LIFEPAK6is

3-2

provide

modules.

in

from

provided

component

may

in

text.

interim

modules.

Schematic

the

detailed

two

levels

have.

was

6

Sec

contained

The

functional

presented

module

an

overall

dis

while

3-3.

Monitor

in

Figure

no-fade,

and

in

boards.

a

given

The

five-lead seven

Module

3-1

(4)

deflection

displays.

Figure

3-1

They

function.

preamplifier

cableordefibrillator

combinations,

iousDCand

isolation

processing.

The

rate

display

ECG

for

zation

heart

between

board

size

each

pulses

rate

Circuits.

are

incorporatedinthe

recorder,

printed

The

numbers1through7assignedtoindividual

correspondtothe

therefore

board

prearnplifies

power-line-frequency

the

provides

The

(5)

display,

circuit

indicate

accepts

patient

ECG

final

monitor

boards,

module

(1)

preamplifier,

(6)

charger,

andinthe

numbersinthe

which

ECG

paddles,

the

board

signals

sums

signaltoreject

components,

and

subsequent

amplification,

from

control.Inaddition,itdetects

successive

for

defibrillator

alarm,

and

systole

heart

rate

event,

module

digital

generates

use,

outputs.

circuit

functions

(2)

and

(7)

power

front

above

contains

the

and

interposes

amplification

signal

the

cardioversion

and

produces

panel

listingofcircuit

the

patient,

cable

signals

common-mode,

calibration,

R-wave

systole

portrayed

rate,

(3).

supply

controls

blocks

circuitry

either

for

via

into

spur

electrical

and

signal

and

portionofthe

synchroni

sound,

3-1

D/A

CONVERTER

I

VERT

AMPLIFIER

DEFLECTION

I

YOKE

(CRT)

VERT

(CRT)

HORIZONTAL

YOKE

MOTOR

PEN

RECORDER

STYLUS

PEN

DRIVE

MOTOR

PAPER

MEMORY

AMP

FINAL

2

BANDPASS

SIZE

ECG &

AMPLIFIER

FREEZE

ECG

OUT

lmV

CAL

SWITCH

REAL TIME

DELAY TIME

R-WAVE

DETECTOR

*-*

RATE

DIGITAL

CIRCUITRY

HORIZONTAL

SYSTOLE

'

I

AMP

DEFLECTION

RAMP

GENERATOR

ALARM

OSCILLATOR

SOUND

ALARMS

RATE

r

AMP

PEN

DEFLECTION

DEFIB

CONTROL

TO

CIRCUITRY

SYNC

AUDIO

TRANSDUCER

VOLUME

SYSTOLE

CONTROL

HEAT

CONTROL

STYLUS

VOLTAGE

FLYBACK

CIRCUITRY

HI

ANODE

CRT

BATTERY

INDICATOR

LOW

CONTROL

PAPER SPEED

POWER

SUPPLY

AC/DC

CONTROL

BATTERY

15V

LI 'J

CIRCUITRY

RELAY

BLOCK DIAGRAM CARDIOSCOPE/RECORDER

3-1.

FIGURE

PREAMP

ISOLATED

LEAD

SELECTOR

rr

CABLE

PATIENT

RATE

DISPLAY

DEFIB

PADDLES

ALARM

CONTROLS

RATE

CHARGE

BATTERY

CIRCUITRY

AC/DC

CONVERTER

BATTERY

CHARGING

INDICATOR

I

ro

3-3.

Monitor

The to

digital

memory

that a

time

power

anode

The

recorder.

fier

no-fade

heating

Module

no-fade

store

readout

base

supply

voltages,

recorder

in

the

board.

and

Circuits

board

form,

representing

to

for

and

board

The

rate

recorder

samples

stores

analog CRT

deflection

and

amplifies

signal

board,

The

(Continued).

the

ECG

successive

the

past5seconds

form,

display

amplification

is

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3-4.

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than

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logic

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Jan.

value

following

case,

1979

3-6.

Preamplifier

Board

(continued)

LEAD

SELECT SWITCH

PATIENT

CABLE

INPUT

PADDLES

INPUT

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BUFFERS

LEAD

SELECT

LOGIC

WILSON

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60/50 Hz

NOTCH

INSTRUMENT

AMP

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CHOPPER

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ECG,

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P-P

FIGURE

C.

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up

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conduct.

insertedinthe

The

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output

instrumentation

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in the

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cable

amplifier.

response

3-4.

(continued)

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quick-acting

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BLOCK DIAGRAM

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R36,

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in

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equipment

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therefore

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in

modulatedbythe

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rate

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the

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higher

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applied

and

conductedtothe

transistor

appliedtothe

gateonduring

preamplifier

20-kHz

frequency.

ECG

signal,istransformedbytransformer

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amplificaton.

further

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frequencies,

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shield

output

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transformer.

patient

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passed

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signalisfirst

the

square

wave

ECG

signal

through

signal-modulated

generatedinthe

primaryoftransformer

Q3.

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20-kHz

gate

each

negative-going

outputisappliedatQ2

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resulting

rectifiedbyQ3

capacitor

ground,

3-11 Jan. 1979

removes

while

wave,

of

Q2.

halfofthe

drain,

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detecting

reappearing

Both

transistors

and

amplitude-

20-kHz

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is

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at

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chopped

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component,

modulation

3-6.

Preamplifier

F.

Isolated

addition

supply.Asthe

with

diodes

respecttoground,

CR18&21

Similarly,

provides-8volts

CMOS

ratings

Board

Power

(continued)

Supply.

servesasthe

opposite

to

regulator

CR19&20

for

are

not

The

20-kHz

isolated

endsofT2

they

are

connect

the

exceeded.

the

board.

outputoftransformerT2in

inputtothe

secondary

alternately

U12,

which

negative

The

regulators

preamplifier

swing

connected

provides+8volts.

swingstoU13,

ensure

power

positive

through

which

that

3-7.

Rate

Board

signal

R-waves

and

rate

of

the

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calibration,

and

generates

digital

rate

board

providesafull

A.

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ECG

whose

to

ground,

blocks

the

signal

outputisUl,

the

providesamidband

the

preamplifier

from

generated

the

patient

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amplitudeatUl,

the

circuits

voltage

simulating

produced

This

network

terminal,

equivalence

by

action

R2,

Ul,

The

rate

and

display

cardioversion

outputs.

showing

interface

schematicofthe

Final

Amplifier.

board

size

Figure

rate

provides

control.Inaddition,itdetects

sync,

3-5

with

On

systole

providesanoverall

other

board

the

circuitry.

rate

arrivingatPl-17isappliedtoa

7.

CapacitorC2bypasses

thus

removing

DC

componentofthe

gainoftwo.

gain

byafactor

typical

inahuman

are

operating

the

effect

pressing

connects

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6.

them

from

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approximately

of

1000

maximum

is1millivolt,

7,

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the1mv

-12V

to

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normally

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1-mv

input

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at

the

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to

button

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-12V

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500

Ula

typical

the

on

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final

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amplification,

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block

stages.

board

bandpass

signal.

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actingincascade

raises

output.

of

the

Figure

the

preamplified

amplifier

25-kHz

harmonics

Capacitor

bandpass

the

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signal

counterpart

To

to

calibrate

Ula,

the

of

applied

pin6input

preamplifier

front

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the

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to the

alarm,

diagram

3-6

C3

amplifier

with

signal

verify

can

divider

inverting

that

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result

Ula.

along

step With

made,

equivalent to a 1-mv ECG

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on the

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service full

normally

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negative circuit

the

output

Ula

isanegative

step,

the

displacement

normality

visual

of

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main

flex

recording

output

equal

amplified

ECG

signal

step

is

connected

assembly.

or

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or to

to the

step

and

(if

of

indicated

can

be

input.

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measurement

1/1000

ECG

input

3-12

of

one

volt

in

the

output

convertedinsucceeding

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the

display

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via

depending

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test

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in

no

subsequent

Pl-8toa

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patient.

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the

CRT

test

on

plug

used

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the

latter

signal

stages

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recorder.

gain

adjustments

reference

jack

and

insertion

for

field

equal

to

thus

Jan.

from

vertical

divider

the

being

(/^l

1979

ERROR

INTEGRATOR

VALUE

CIRCUIT

ABSOLUTE

*

AGC

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SAMPLE

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^h

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DIGIT

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3-5.

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VOLUME

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DURATION

*

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1

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GAIN

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SIZE

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LOADING

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determines

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the

(continued)

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(continued)

control,apotentiometer

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conjunction

output

the

vertical

load

circuitofUla.

deflectionofthe

(ECG

size)onthe

with

front

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pot

setting

CRT

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recorder

panel

thus

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of

Ul

outputisappliedtofinal

gainof6.

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corder.

peak

amplitudeofsignal

6 x

5/6x1000).

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R-Wave

time

during

functionofthe

R-wave

reference

gain

stage,anAC-coupled

sistingofan

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AGC

amplification,

of

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unity-gain

attenuate

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andTwaves

availableattest

absolute

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peak

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loop

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buffer.

frequencies

detection

gain

setting,avariable

amplifier

fraction

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U3aisusedasECG

the

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ECG

OUTistypically5volts

R-wave

amplitude

patient.

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processing

and

reduceittoanessentially

automatic

buffer

absolute-value

circuit,

voltage-controlled

will

nowbeexamined.

appearsatop

amp

theACcomponentsofU2a

The

coupling

below

and

favoring

point3,enters

circuit,

about3Hz,

the

using

real

time

maximum

can

vary

Therefore

circuitsisto

gain

control

stage,

andafeedback

peak

detector,

resistance

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ECG

U2a

input.

AGC-regulated

components

thus

R-wave

spectrum.

the

AGC

U2b

and

feedback

Uld.

signaltothe

(5/6)

substantially

the

sense

involvesavariable

network.

signal,

The

variable-gain

resistanceofQ8.

outputtoUlc,

(R23,

discriminating

C6)

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(from0to

provides

ECG

setting,

(i.e.,

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the

fixed

loop

error

after

selectively

buffer

loop

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a

OUT.

re

the

with

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final

a

against

output,

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circuit

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original

signalatTP3is+V,

conduct

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periences

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path

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scaled

handifthe

for

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U2b

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inputs:-Vthrough

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output.

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C13,

R34, R28,

periodispresentedtoU2casan

R29

maintainedatthe

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for

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amplifier

output

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ECG

signal

level

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error

junctionofR30

3-14

waveformatUld

For

example,ifthe

causes

through

amplifier

and+Vthrough

+Vxl)=+V.

conducts,

thus

+V.

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and

clipping

are

average

signal.

providing

has

but

restate,

are

conducted

voltage

integrated

value

overanRC

The

and

R29.

Jan.

output

CR7

thus

20K

one

all

volts.

error

1979

to

10K

ex

ohm.

On

the

no

input

wave

is

by

3-7.

Rate

Board

B.

R-Wave

The

applied resistance

For error

negative,

integrating

Circuitry

Detection

error

to the

peak

detected

signal

(continued)

signal

in

so that

capacitance

is

gate

proportion

voltages

to

U2c,

CR15

inverted

of

FET

to

13

is

not

increases,

and

integrated

Q8,

in

signal

of

more

swings

conducting.

order

to

strength.

than

+2

positive,

and

AGC

at

U2,

vary

Q8

volts

and

Thus

damping

the

14

and

drain-to-source

across the

CI3,

output

effective

periods

lengthen.

the

C.

With

error

voltage R thus

to

minimum.

R-Wave

zero

signal

is

minimum. maximum.

U2c

is

negative

been

brought

presence

tiation,

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filtering

and

U3C.

passing

emphasizes

the

high-end

spectrum

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stage

U3d,

instantaneous

relatively

while

noise

rejecting

or

ECG

signal,

reference

is

at

its

is

at

its

and

Detector.

to a

of

an

slope

function

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the

principal

the

roll-off.

and

effectively

with

slope

low

other

the

-2

maximum

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gain

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high

ECG

maximum

Q8

resistance

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ECG

reference

R-wave.

magnitude

involves

they

R-wave

low

end

of

the

bandpassed

R25

and

of

the

frequency

the

high

artifacts.

steady-state

volts

plus

at

U2a, signal

positive

signal,

This

detection,

is

level,

inversely

is

maximum.

level

process

two

applied

levels

level

its

by

AGC,

involves

and

op

provideapass

harmonic

the

spectrum

Stage

C8

U3c

provides

the

basic

wave.

favors

the

ECG

components

CapacitorC7serves

harmonicsofthe

frequency

spikes

CI3

voltage to

U2c,

and

drain-source

proportional

such

that

(+0.5V),

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average

amplitudes

is

now

filtering,

duration

amp

stages

band

from5to

components.

and

effectively

the

high-end

low

roll-off.

waveshapes

sensing

differentiated

caused

is

zero,

the

Q8

gate

resistance

to

1+R,

the

error

the

Q8

gate

U2a

gain

having

examined

for

differen

detection.

employing

17

Hz,

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is

U3b

provides

of

the

provided

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to

pass

wave,

typically

the

is

signal

voltage

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the

U3b

by

the

by

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slope

configuration.

outputaslong

detector

Circuit

as

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are

resistance

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producing

when

an

the

slope

causes

the

unvarying

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maintained

-.6-(+.6)).

an

at

ladders.

output

input

-0.6

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outputatU2d

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absolute

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the

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to

U3d,

this

of

condition,

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+0.6V

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large

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volts.

3-15 Jan. 1979

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3-6.

RATE

BOARD

3-16/3-17

800053

SCHEMATIC

jan

^\

1979

3-7.

Rate

C.

Board

R-Wave

Circuitry

Detector

(continued)

JfF^

Duringarapidly

in

the

R-wave,

positive

(the

The

Finally,

millivolt,

responds

The circuit

12-volt

milliseconds.

With

is

initially

output

time

drops

charges

When

positive

or

constant

U2d

output

when

with a +12

output

-12V

output

becomes

constant

below

quickly

U2d

output voltage

transistor

stitutingasignal

the

negative.

threshold

is

U3dabsolute

U2d

input

associated

of U2d

uncharged.

+12V

of

threshold,

through

has

to

conduct.

changing

U3d

ECG

output

When

it

across

then

zero

(+.6-(+.6)).

output

difference

volt

output.

with

has

transistor

lasted

(indicating

When

and

C5

charges

this

transmitted

path

U2d

been

that a

is

output

CR4,

positive

Asaresult

valid

input

will

to

equal

is

+1.2V,

CR5

accounting

exceeds

goes

the

requisite

positive

waves!ope

ECG

slope

through

20

ms.

When

reverts

the

RC

of

for

almost

via

CR2

to

Ql,

R-wave

U3d,

or

U2d

1.2V

Ql

senses

less

exceeds

CR3

the

to

that

the

has

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exceed

input

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by more

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whether a

minimum

than

threshold,

and

slope

-12V

path

20

ms,

base

16

goes

sensed.

as

experienced

1.2V,

becomes

the

either

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0.6V

than

comparator

drop).

a

positive

of 20

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U2d

R13.

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of

The

eventually

C5

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the

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Ql

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this

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RC

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Cardioversion Sync

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multivibrator.

stable

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shutoff

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which

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drives

and the

lator

with Q2

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PI-25,

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result

the

monitor

defibrillator

has

base

high.

as

addition,

version

discharge.

of

Ql

is

reverts

Ql

to

negative

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is

inputted

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that

with

respectively.

transitions

sustain

is

thatQbecomesalow

base

of

modules

for the

Q2

low.

interfaced

panel,aconstant

been

supplying

driven

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signal

in

the

low by

high

SYNC

to

defibrillator,

effected

at

by

C33

discharge

output.

An affirmative R-wave detection

U4a

asalogic

time,

the

flip

flop

itsQandQterminals

Now,

to

its

unstable,

to

and

with

10

during

that

the

complementary

milliseconds.

that

moment,

SYNC

current

conduction

Q,

02

is

conducted

generate

current

switches

to

an

R-wave

the

SYNC

off and

the

signal

through

low

to

that

has

been

high

and

low-

11

pulsed

condition,

10

ms.

with

the

pushbutton

source

to

no-fade

marker

Q2

in

via

its

board

on

the

Pl-18.

collector

the

enablesacardio

R68,

one-shot

in

its

low,

It

the

thus

defibrillator

actuated

on

defibril

Now,

through

CRT.

In

3-18 Jan. 1979

3-7.

Rate

Board

E.

Rate

an

belowinconjunction

As

Figure

U4b,

175

conducted

systole

the result,

approximates

The

Circuitry

Measurement.

R-wave

soonasU4a

involve

3-7(b)

drives

milliseconds,

that

through

LEDtolight

U10,

pin8,audio

the

audio

thatofthe

feedback

loopofQ

servestoprevent

output

refractory

from

period.

retriggering

(continued)

The

further

rate

sensing

with

has

transitionedtoits

itsQoutput

the

hightoa

unittoits

Figure

Jl-1

3-7(c).

andonto

for

that

alarm

sounds

heart.

output

any

new

(and

the10ms

consequencesofthe

and

display.

pulse

diagramsofFigure

10ms

second

unstable

175

oscillator

stage,

The

resultingQoutput

the

display

ms.

The

for

They

unstable

one-shot

whose

boardtocause

sameQlow

that

withaninterrupted

high

from

U4btothe

presumably

single-shot

spurious)

during

detection

are

discussed

3-7.

state,

of

multivibrator,

duration

low

is

the

enables

interval.Asa

beep

whose

period

inputofU4a

R-wave

detector

the

175-ms

(>%

During

shot

returnedtohigh,apositive

the

revertedtoits

heartbeat

period,

stable

condition,

pulse

about2ms,asdeterminedbyR48,

connecting

After

to

the2ms

start

current

C21

has

Figure

current

produced

that

gatetoconnect

on

C21

ratio

10-ms

shorted

a

new

C24,

Figure

lengthoftime

recent

measureofthe effectofC24

successive

average

U5a,

pin1to

period,

rechargingata

through

since

3-7(d).

excursiontothe

a Q

transistor

then

been

That

output

ground

the

steady

climbing

climb

unstable

hightoU5b.

C24inparallel

and

C24

then

rapidly

equals

state,

the

capacitance

the

U5b

connection

temporarilytoground

C21

recharge

3-7(e)

detected

heartbeatsissuggestedinFigure

short

cycle

servesasa

between

R-wave.

current

sampling

term

the

rateatwhich and

variations

will

Thus

and

U5a

gate

rate

Q4.

Asaresult,

essentially

reachesastateinwhich

ratio.

will

through

start.

stored

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yet

just

after

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C20)

draining

has

C20

enabled

off

reopened,

determinedbythe

the

steadily

with

stopped

state,

This

voltage

react

the

10-ms

control

with

C21.

At

the

end

open,

detected

the

C21

U5a,

pins

Meanwhile,

sample

proportionaltothe R-wave

across

heartisbeating.

charge

3-8.

quicklytosustained

the

10-ms

with

had

switch

U4a-Q

briefly

U5a,

single

having

chargeonC21.

allowing

constant

voltage

time,asin

across

when,inits

single

signal

The

of

will

1 &

the

again

2,

and

C24isan

buildups

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shot

causes

charges

the

charge

me

current

be

and

voltage

the

during

serves

(for

thus

C21

^

< 1

then

across

most-

inverse

The

to

changes.

In

the

first

experienced.

voltage

the

end

C21

and

initial

it

is

seen

staircasedtoa

level.

halfofthe

During

across

of

thatonC24isdistributedtoC24. chargeonC24isassumed

C21)

each

ramp,

that

withinafew

virtually

mock

each

history

heartbeat

illustrated,a60-BPM

period,

therefore,

V21

rate

(the

is

rampstoapproximately1volt.Atessentially

the

difference

heartbeats

stable

3-19

between

zero.

level,

the

charge

For

simplicity,

Eveninthis

the

voltage

asymptotic

with

on

worst

across

the

Jan.

the

case,

C24

C21

1979

has

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3-24 Jan. 1979

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3-28 Jan. 1979

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slope

In

reducing

into

In

order

from

memory

Record

sampling R2

of

from

U17

memory.

the

one

read-out

of

the

ECG

signal

The

slope

C12

and

processing

U19d

to

produce

That

flip-flop

the

signal

INTENS,

of

intensity

consequence,arelatively

the

CRT.

to

give

an

Circuit

period

counter.

and

U18

This

word

is

inverted

isanegative-going

the

vertical

on the

the

steepest

power

requirement

the

operator

interesting

is

provided.

the

cycle

U8

in

the

The

to

latch

is

thus

in

serves

is

the

an

deflection

faster

ECG

counter delay

resulting

the

applied

four

as the

sensed result

absolute

and

traveling

slopes,

low average

and

adequate

before

reachesacount

record

Q output

binary

when ECG OUT

basis

by

differen

in

operational

value

amplified

for

of

at

full-wave

signal.

portions

experienced

the

chance

reaction

that

waveform

circuit

from

word then

as a

binary

the

on

beam

of

3-32

3-8.

No-Fade

I.

Delayed

Board

Circuitry

Record

(continued)

f^k

number

form, normally recorder

delay

Each

to

and

mechanism.

ramp

produced

sample a and

For start

to

64

come

therefore

period

then

simplicity,

at

1.

During

and

constituting

from

sample

inserted

ramp

through address

word

1.

will

newest

resistance

filtered conducting as

signal

corresponds

byacycle

the

memory

back

to the

1.

Therefore

that

address

periods

into

address

Similarly,

1024, 33

back

will

represent

sample,

and

FREEZE

DELAYED

counter

takes

is

in

sketched

ramp,

the

32.

earlier

during

to

be

conveyed

the

which

network

amplified.

to

gate

RECORD.

an

ECG

RN3,

count

2050/400,000 serially

original

ramp1the

it

sequences

the

word

first

This

address

than

the

1 at the

ramp

1.

At

clock

to

sample

will

be

lodged

summed

It

is

U14c

and

Figure

A/D

converter

from1through

sec=5.125

scanned

address.

from1through

read-out

sample

input

representsasample

present

end

of the

2,

the

count

the

recorder.

taken

993

in

there

then outputted

3-10

through

address

from

to the

sample,

period

address

64,

samples

address

to

analog

conveyed

to the

illustrates

sampling

2050.

ms.

its

scan

1024,

RAM

recorder

which

occupied

will

the

word

As in

earlier

2.

through

staircase

Each

During

1024

is

assumed

at

clock

taken

will

cycle

stored

ramp

than

voltage

the

such

addresses

to

then

back

count

will

993

be

by

from

1,

2

at

this

the

Thus

the

occurred

J.

5.09

Blanking

sweeps

A

seconds.

is

effected

Intensity

200

Hz

divide-by-four

applied the

Horizontal conducted oscilloscope. the

analog

conducted

oscilloscope.

K.

Horizontal to

generate

operation

2050

pulses

5.125miHi

to 5

volts

buffering

U19b output

to

recorder 993 x

Control.

is

gated

in

Control

square-v/ave

constantly

5.125

the

ms

In

to the CRT

Output

Circuit.

from

counter

through

(freeze

amplifier

yieldasawtooth

is

gated

Sweep

The

gate

Sweep

the

from

sec.

DC.

OR

gate

Circuit.

U14b

Ul2,

U14a.

U14a

Circuit.

horizontal

mode

the

400-kHz

The

ramp

This

input

U19a,

through

senses

earlier,

order to

deflection

Gate

the

Cycle

U12.

to

UlOc

Jl,

The

to

pin2output

Asaresult

to

Jl,

The

sweep.

not

selected)

clock,

voltage

to

the

summed

swing

U14b.

3-33

that

save

Logic,

Ul2,

control

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sweep

22

one

21

ramp

Inasmuch

over

Sweep

with

from

and

records

is

to

say,

power,

only one of

amplifiers.

Horizontal

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is

pin2output

the

analog

out

as

signal

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also

ECG

sample

as

signal

from

the

as

builds

the

-2.5

+2.5

overacount

normal

that

time

Circuit

volts

to

-2.5

the event that

the delay

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Sweep

inputted

Circuit

(50

gate

of

four

H0RIZ

applied

is to to

out of

ECG

OUT to the

A/D

converter

the

ramp

sweep

period

swings

is

applied

and

inverted

volts.

is

every

blanking

to

the

Hz)

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U14b thereby the control

four

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in

normal

from0to

is

from

to

This

four

and

in

is

used

0

in

3-9.

Recorder

circuits

Board

for

Circuitry.

stylus

heating,

The

pen

recorder

drive,

board

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contains

paper

drive.

the

control

xjjp*

Heating

is

provided

is

effected

U3

timer

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voltage

period,

to

timer

Q2

base,

through

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the of

resistor

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of

circuit.

recorder

that

therefore,

U3,

it

P2-3

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U3,

timer

U3.

duration

pin3cyclic

0.11

msec

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paper

recorder

6-volt

The

fractionofthat

at

25

amplifier

to

the

emitter

constant

minimum.

drive

paper

drop

mm/sec.

Q3

armature

counteracts

voltage

the

recorder

by

the

by

the

turn-on,

turns

4,

turns

fully

that

for

an

charged,

pin3output

The

R27.

of

U3,

high

circuit

at a

across

The

to

supply

winding.

across

stylus,

current

single

on

Ql

pulse

current

Ql.

collector

reappears

transistor

output

Charging

required

from

circuit

charging

Cll

voltage

without

on,

delay

conducting

uninterrupted3seconds

Ql

duty

cycle

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varies

pin3cyclic

is

adjustable

turns

alternates

(U3,

from

off

pin3output

about

low

is

(via

R27)

producesasteadyDCcurrent

fixed

itself

inverted

motor

speed

so

voltage

constant

Negative

frictional

the

of

that

tapped

output

drive

motor

25

mm/sec.

its

anode

by

at

Ul,

current

feedback

or

winding

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associated

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high

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about3seconds.

low.

and

That

at

U3,

stylus

for

quick

Ql

collector

low

low)

47%

(R27=0)toabout

0.104

from

msec.

0.45

Zener

is

regulated

potentiometer

10

analog

through

to

Ul,

inertial

inductance.

variations

of

that

Ql

low,

3.

heating

initial

goes

under

depends

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duration

msec

maximum

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CR1

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to

R20

fixes

controls

the

12

paper,

output

and

by

the

base-to-emitter

For

that

transmitted

Applied

to

current

warmup.

the

19%

fixed

command

on

high.

of

the

setting

(R27=50K).

of

U3,

to

advances

the

a

-6

volts.

the

speed

power

motor

and

commutator

from

by

maintaining

Q3

3-10.

The

ECG

cation fier

mounted

input

stages

line.

applied

or

right

pen

deflection

signal,

and

application

on a

to

the

depending

either

provide

Op

amp

heat

sink

two

velocity

overshoot.Abridge

feedback

the

former

representation,

Rate

lighted

also

Four-bit

are

channeled

decoder

respectively.

signal

lead

stage

Display

digital

providesablink

binary

Ul.

Ul

is

involving

the

Board

display

coded-decimal

through

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Transistor

low

inputted

selector is

placed

real

time

to

the

pen

high-frequency

U2

furnishes

to

dissipate

pen

deflection

on

the

signal

and

sendsafeedback

circuit

balanced

primarily

latter

Circuitry.

of

indication

including

via

adjustment

primarily

The

patient

numbers

Jl

to

pins

four

pins

correspondtodecimal

supply

through

on

pin4of

STD.

or

delayed,

deflection

discrimination

the

power

thermal

windings

polarity.

the

potentiometric

damping.

circuit

heart

synchronous

generated

7,

1,2and

appears

motor.

against

amplification

energy.

in

series,

The

small

signal

main

to

windings,

pickoffs

for

fidelity

of

Figure

rate

in

beats

with each

in

the

6 of

BCD-to-seven

at

The

for

third

U2

of

3-12

per

beat.

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Jl-6

first

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drive

numbers

voltageisinputtedatUl,

Ul

blanks

the

display

for

amplifi

two

ampli

noise

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output

on

such

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Rll

at

square-wave

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R10

inertial

R10,

and

a

minute.

count

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1,

2,4and

16.

when

the

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R17,

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SCHEMATIC

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ALL RESISTORS ARE IN

1.

NOTES:

MFD/WVDC.

ALL CAPACITORS IN

2.

800033

BOARD

RECORDER

3-35/3-36

3-11.

FIGURE i

CIRCUITRY

3-36.

DRIVE

MOTOR

WK SI

MEAT

U9

CPU

20

PAPER

IK182I4

-\IV

3-10.

Rate

Display

Board

Circuitry

(continued)

G

|J—L

-Sn.c.

The

decoder

combinations,

range0through

series

diodes,

resistor

one each in

EachDSmodule

arrangedasone

cathodes

3

to

connectedtoa

connected

base,

segment,aspartofa

the

that

of

emitter

transistor

FIGURE

outputs

each

9.

contains

segmentofa

all

seven

Ul

LED

emits

3-12. DISPLAY

through

combination

A

high

in

RNl

and

DSl,

pins

atagiven

thence

DS2 and

seven

LED's

of a

transistor.

output

conductsbyvirtue

light.

displayofsome

are

high,

BOARD

9-15.

representingadifferent

to

the

DS3.

such

LED's,

seven-segment

connected

When

and

when

The

result

SCHEMATIC

These

anodes

pins

is

transmitted

of

with

each_LED

figure

through

the

anode

simultaneously

ofapulse

is

the

display

integerinthe

go

high

in

digit

through

three

light-emitting

spatially

y

array.

module

of a

at

pins

given

its

the

of

LED

cathode-

transistor

that

range0through

800161

ten

in

the

a

The

14,

is

one

9.

TransistorQ4controls

plays

playedinthe

place.

digitsinthe

ten's

unit's

place,

the

lightingofLED

place.

SimilarlyQ3controls

whileQ2controls

3-37

segmentsinDS3,

DS2

DSl

digitsinthe

Jan.

which

dis

digits

hundred's

1979

dis

3-10.

Rate

Display

The

three

strobe

digital

strobe

any

inputs

rate

pulses

given

next7ms,

enabled

digits

illuminated.

for

selected

Board

transistors,

circuits

transistor

during

3.5

at

on

Jll,

any

ms

for

Circuitry

which

each.

display

Q2,

J10 and

on the

one

line

is

enabled

time

(continued)

Q3,

and Q4 are

J9.

rate

is

10.5

for

the

other

Eye

persistance

inagiven

The

board.

ms.

3.5

turned

strobe

The

ms,

then

tv/o

transistors

of

vision

readout

on successively by

signals

period

strobe

to

originate

betv/een

duty

disabled

are

allows

appear

cycle

for

sequentially

all

steadily

in

successive

is

1/3;

the

three

3-11.

Heart

Jl-12.

conducted

separate

When emits digital

Switch

and tively

Power

power

and

high

A.

beat

Arrived

through

LED

DSl

is

light.

display

SI

and

RN3

respectively,

for

Supply/Deflection

supply/deflection

vertical

voltage

Cardioscope

signal

second.

current

connected

The

fraction

U7,

potentiometer

during

ground conducts

As diode current

improves

for

screen

pulses

generated

at the

Ql,

in

DSl.

enabled

The

visual

isalight

S2

select

heart

beat

deflection

supply

(CRT)

incoming

Power

ramp

to the

betv/een

of the

2,

depends

R15.

each

depends

sweep

on the

the

overall

curvature.

base

aresistorin

through

result

blink

from

thereby rate

comparators

Board

board

signals

and

the

Deflection

at

Pl-22

op

amp

U7

CRT

Jl-1

and

Pl-22

primarily

The

because

on

instantaneous

positive

increases,

visual

in

the

R-wave

of

transistor

RNl,

Q2 at

strobe

in

the

during

differently

setting

Circuitry.

provides

for

the

main

power

Amplifiers.

ramps

from

amplifies

horizontal

Jl-2.

signal

on

the

fraction

the

resistance

signal

half

of the

diode resistance decreases. This effect

linearity

detector

Ql,

they cause +5

and

thence

frequency,

front

the

on

panel,

each

successive

valued

low

and

the

rate

As

shov/ninFigure

amplification

cardioscope

supply

for

The

-2.5

to +2.5

that

deflection

applied

signal,

to the

calibrated

applied,

however,

through

strength.

ramp,

of

the

CR18 on the

are

conveyed

to

the

separate

adjacent

heart

resistances

high

limits

board.

for

the

(CRT)

the

module

horizontal

volts

to

provide

coil

externally

non-inverting

setting

varies

CR17

Diode

sweep,

compensating

volts

anode

to the

beat.

in

respec

3-13,

horizontal

display,

as

sweep

50

times

of

gain

slightly

and

CR18

CR17

negative.

through

to be

of a

LED

RN2

the

CRT

follows:

a

the

input,

to

The

sampled

application

constituted

frequency

covers

milliseconds.

than

about5seconds

ECG

wave

to the

ECG

signal

the

appears

vertical

representsaspectrum

original,

but

at

Pl-21

deflection

inasmuchasthe

is

horizontally

3-38

for

coils

power

of the

about

portrayed

swept

amplification

CRT.

1000

The re

greater

history

once

each

Jan.

5

and

in

1979

+15.

FREAMP

PREAMP

H.V

DRIVE

GWD

ONO

+400

62

• OWLY)

ANODE

LEAD

(REP)

7

:ri<>-

CIS±-

NOTES: UNLESS OTHERWISE

1. ALL RESISTORS

i

5

V

-

MRBlft

.025/

500

j

2. ALL CAPACITORS IN

FIGURE

SPECIFIED

ARE

IN

MFD/WVDC,

3-13.

OHMS,

POWER

1/4W,

5%,

SUPPLY/DEFLECTION

800112

BOARD

SCHEMATIC

3-39/3-40

Jan

3-11.

Power

Supply/Deflection

Board

Circuitry

(continued)

(f^

A.

Cardioscope

The

amplified

converted

Transistor

Q13.

In

(CRT)

signal

to

deflection

Q10

providesaconstant

proportiontothe

pin6,conduction

as

diodes).

proportionatetosignal. increases

increased

Accordingly

through

Q12

current

proportionatetosignal.

creases

B.

High

square-waves,

Hz,

On

the

1

and2are

As

C13

2

increases.

8

and

of

the

conduct

from

Voltage

arrive

negative charges

11

go

input.

v/hen

J3

Supply.

generatedonthe

at

the

driven

through

When

low

This

pins8and

Deflection

Amplifiers

appearingonop

coil

current

magnitudeofa

diminishes

R26,

CR19

and

Q14

With

to

turns

through

is

With

through

Pl-1

going

low

the

and

R27

and

High

voltage

of

the

power

transitionofthe

which

RIO

threshold

remains

is

coupledtothe

11

causes

and

low

of

U6

(continued)

amp

drive

current

Qll

turned

positive

J3.

off

negative

CR20.

no-fade

Rll,

voltageofU6

until

are

off

signal

A

negative

Q13,

signal

drive

boardata

supply

signalatPl-1,

U6,

pins8and

the

voltageonU6,

the

baseofQ9

high.

output

positive

and

while

U8,

pin6is

byatransistor

source

for

outputatU8,

Q12

(which

and

Q13

currentismade

increase,

outputatU8,

increasing

increase

pulses,

positive-going

frequencyof200

board.

11

is

reached,

causingitto

network.

base

drive

are

connected

current

Q14

current

U6,

pins

to

go

high.

pins1and

U6,

transition

of

6

current

in

pins

During

of

is

stored in the core

Voltageonthe

stored

the

T2

increases

turned

in

secondaryoranode

The

resulting

secondary

to

ground,

cathode

topped,

CR22

c-

+12 from

non-inverting

ray

rectifiedinCR16,

and

appliedtothe

Volt

Regulator.

the

charger

throughtothe

locks

via

In

the

Pl-10

addition,

T2

primary

time

Q9

is

conducting,

linearly

off,

the

secondaryofT2

is

secondaryisdependentonthe

the

core

during

storing

released to the

each

energy

cycle

voltageisadjustedbythe

high

are

diode-rectified,

and

tube.

voltaqe

positive

appliedasanode

A

lesser

portionofthe

smoothedbytwo

voltageof9KV

filteredinC15,

CRT

accelerating

Zener

board

terminalofop

inverting

output asavoltage

at

after

winding

12.1

being

diode

to

be

droppedto6.2

amp

input

volts.

regulated

filtered,itforms

current.

(via

the

currentinthe

in

flies

back

secondary.

i.e.,

swingsatthe

anodeat+400

CR12

causes

U5.

Feeding

emitter

This supply

potentialisapplied

elsewhereinthe

primary

the

core

to

amountofenergy

on

time

of

+9KV,

of

T2. and

Q9.

When

the

The

potentiometerofRIO.

top

of

the

capacitorsinseries

in

the

monitor

secondary

voltage

regulatedbyR31,

the

+14.4

volts

followers

the

appliedtothe

back

the

Q7,

power

supply

volt

output

level.

input

and

offboard

monitor.

winding

Q9

energy

is

CR21,

Q8)

for

3-41 Jan. 1979

3-11.

Power

D.

Supply/Deflection

Power

Supply.

potential

charger

virtue

flipflop

terminals

These

waves

paralleled

VMOS-FET

volt

input

first

terminal

from

developed

effectistwice

reversalofflow

30

volts,

Board

ReferringtoFigure

across

inputatPl-12.

of

RC

U2a,

output

zener

feedback.

the

result

complementary

are

buffer

gatesoftwo

transistors.

flowsinTl

center

3.

Withagiven

across

but

tap

the

14.4

direction,

of

opposite

Circuitry

diode

amplified

CR1isderived

Amplifier

Its

squarewave

being

that

squarewavesof20

and

setsofthree

Asaresult,

primary

to

terminal1,then

full

volt

winding,

directionofflow,

primarybyvirtueofauto

inputoressentially30volts.

the

full

polarity.

(continued)

3-13,

Ula

the13volt

from

the

oscillatesat40KHz

output

the

flipflop0and

applied

clocks

kHz

pushpulltothe

high-current

current

driven

alternatingindirection,

from

center

the

inductive

winding

inductionisagain

regulated

14.4

volt

by

D-type

Q

frequency.

capacity

by

the

+14.4

tap

to

voltage

transformer

With

Preamolifier

Tl-6

and

squarewave

are

±20

volts

180°

outofphase

Pl-19

The

p-p,isfull

level

On

to

and

regulator

by to

On

-62

portionofthis

For

7,

and

voltage

in

the

Tl

17

volts

CR7

virtueofCR5,

regulator

negative

volts

squarewave

9,

10

chopper

Tl-9,

and

voltagesatthese

and

Pl-20is30

wave

the

anode

secondary

negative

alternate

U3,

which

U4,

swings,

across

voltageistappedtosupply

rectification,asTl

and

11,

respecttocenter

conduct,

providing

driveistapped

distributed

out

points

±10

volts

with

volts

from

primary

rectifiedbyCR10

voltage

winding

with

conduction,

producesa-12

CR6

alternate

v/hich

CR8

itself

alternately

tap8,diodes

rectification.

respectively.

each

other,

peak-to-peakat20

center

circuit.

terminals6and10alternately

respecttoground.ByvirtueofCR4

the

conduction

provides

the+5volts

conducts,sothat

with

respecttoground.Aselected

swing

CR4,5,6,7and8alternately

offoftheTlsecondary

through

(with

the

taptoend

and

-16.5

volt

secondary

Pl-19

and

Pl-20.

respecttochassis

Since

differential

CR11

voltsisappliedtovoltage

regulated

+7.5

zener

these

voltages

signal

kHz.

points,30volts

for

useat26

output.

voltsisapplied

regulated

CR9

CRT

grid

winding,

supply.

maintains

bias.

points

negativeorpositive

at

The

ground)

are

between

volt

swing

Similarly,

6,

with

The

outputsofthe

in

casesofthe

U3

andU4respectively.

zener

diode

CR9,

rectifiers

-12R

adjustedbypotentiometerR4and

and

are

+5R

voltages

The

-10Vto-60V

3_42

filteredbyC4,

are

series

outputisregulated

C6,C8and

pass

regulated

by

filteredbyC9.

Jan.

1979

by

(This

page

intentionally

left

blank)

3-43

May

1978

3-12.

Monitor

module

source

selectionofbatteryas+15

(d)

As

line,

thentothe

former

Charger

provides

for

module,

Sensingofbattery

indicatedonFigure

the

lineisconnected

secondaryisapplied

Board

for

power

(a)

(b)

transformer,

Circuitry.

Rectificationofline

Battery

condition

3-14,

The

charger

trickle

volt

sourceifAC

and

charging

when

the

moduleisplugged

through

across

fuseF2on

locatedonthe

the

boardinthe

poweras+15

charging,

diodes

(c)

powerisinterrupted,

status.

the

module

CR1,

monitor

volt

Automatic

intoa115-volt

charger

proper.

CR3,

board,

and

CR4.

jr

"^

and

Trans

Rectificationofone

secondary

Jl-1

is

slow-blow

Assume

that

J2-3

positive

The

return

A

half

With

the

chargeClwill

be

via

and

connectionofthe

involves

that

diodes

to

initially

is

at

relativetoJ2-3,

path

cycle

later,

center

stillbethrough

ground,

CR4

WithClcharged, the

normally

fuseFlto

the

front

pointsofapplication.

Trickle

CR1

diode

through

whose

fully

current-limiterR2andonto

positive

charged,

open

PI-9.

panel.

chargingofthe

in

half

terminalisplugged

the

half

CR4

accommodate

its

maximum

from

the

tap

now

and

relayKlwill

contact.

That

Actuationofthat

wave

trickle

the

and

3,

the

transformer

negative

maximum

resulting

capacitor

initial

potential

+15

Cl,

charging

secondary

amplitude.

currenttochargeClflows

grounded

maximum

positive

J2-2.

The

plateofCl

negative

relativetoJ2-2,

J2-1.

have

+15

swing

The

return

energized,

voltsisthus

pointisconnectedtothe

switch

battery

rectification.

involves

into

charge

throughR2is

The

the

Pl-7.

connects

full

rectified

nickel

appearing

voltstooutput

and

relay

of

Cl.

voltage

With

Kl.

swings

the

across

center

through

is

through

willbeat

current

path

pulling

outputted

power

the

secondary

cadmium

When

150

CR3toJ2-3.

J2-2.

flow

fromClwill

its

wiper

through

switch

+15Vtoits

voltage

output

the

mA.

is

battery,

battery

the

Fuse

so

tap

J2-1.

to

on

and

passed

is

F2

to

^

While

of

on,

connectedtoPl-6.

whenever

battery

Ql

positive

channeling

charging

chargeisoccurring,

(around16volts).

the

+30V

current

WhenACpowerisnot

AsaresultKlwiper

battery

outputtoPI-9.

equipotential,Qlis

Battery

PI-3.

terminal

voltage

dropstonear

conditionisindicatedbya

Zener

diode

maintainsavoltageof12

CR2,

dropstoonly

zero,

the

CR1

output

The

base

beingat15V,Qlswitches

through

The

LED,

flows.

availableoris

switchestotheNCcontact,

Moreover,

off

and

whose

slightly

causing

Rl,

labelled

LED

BATT

anode

volts

below

the

meter

3-44

Ql,

andafront

BATT

CHG,

not

selected,

withQlbase

CHG

does

front

is

panel

connectedtothe

across

that

level,

needletofall

pulls

accordingly

the

panel

emitter

LED

lights

relayKlde-energizes.

thereby and

not

illuminate.

meter

itself.

the

connecting

emitter

now

connected

battery

If

battery

meter

into

current

the

Jan.

to

+

red

range.

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3-45

Jan

1979

3-13.

DC DEFIBRILLATOR

The

following

DC

Defibrillator

diagram

data

Defibrillator.

presentedinSectionVIprovides

for

the

paragraphs

subassemblies

circuit

3-14

through

description.

which

comprises

3-16

The

the

provide

interconnect

complete

the

LIFEPAK

interconnection

LIFEPAK6DC

6

wiring

3-14.

Main Board Circuitry

The

central

volt

of

these

inputtohigh-voltageDCpulses

functionofmain

pulses.

Entailed

provisionofsupply

control.

capacitor

energy

(e)

disconnectionofECG

mode

(g)

status

to

the

A.

On-Off

the

of

on-off

Kl not

and

In

its

monostable

of

front

stantlyto+12

The

aspectsofactive

shunt

level

enabling

withdrawal;

selection;

(defibrillationofsynchronized

display;

patient.

Control.

main

transformerTlwill

relayKlis

coil

conducting.

theKlwiper

the

quiescent

emitter

the

POWER

panel,

(See

board

to

appearsatJ3-3.

groundisopen

and

flip-flop

switch,amomentary

grounds

volts.

defibrillator

andtocontrol

steps

voltages,

(d)

monitoring

and

(h)

Figure

The

+12

include

controls

control

(b)

high-voltage

initialization,

are:

dumpingofunwanted

circuits;

controlofstored

3-15).

volt

input

from

TheDCinput

eventuallybecompleted

energized.

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because

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bypass

state,Q3is

baseatthe

path

involving

not

conducting

+12

volt

UlaQoutputishigh.

switchonthe

Jl-9,

thus

Figure

causing

3-16

traces

boardisto

the

power

on-off

(a)

energy-storage

pulse

timing;

stored

(f)

discharge

cardioversion);

charge

the

charger

pathtoterminal

v/hen

however,

transistor

viaafront

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input

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subsequent

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but

potential.

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first

defibrillator

convert

+12

application

control,

and

active

(c)

stored

energy;

application

board

the

panel

Q3.

maintains

events.

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1

coil

path

of

from

path

control

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depression

almost

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is

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ground

state,

and

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which

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FIGURE

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3-15.

MAIN BOARD SCHEMATIC

3-47/3-48

Jan

197S

3-14.

Main

Board

Circuitry

(continued)

v*

A.

On-Off

Control

POWER

SWITCH

1st

U1A

l|

DEPRESS

(ON)

RESET"[/

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U1A Q

U1B Q

(continued)

RELEASE

Q3

CONDUCTS

* '

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U5A CONDUCTS

2ND

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DEPRESS

(OFF)

[/-

i_r

FIGURE 3-16. ON-OFF CONTROL

When

Ula

finally

after

off

to

charger

to

off

itsQoutput

Kl

energized,

transformer

For

is

pulse

depressed,

enter

about

constitutinganew

causes

low.

path

POWER

Q3.

The

typeDflip-flop

input

reset

winding

comparable,

Ulb

transistor

path

thereby

Tl.

subsequent

through

sending

its

set

0.2

second,

theQoutputofUlb

Asaresult

to

ground.

revertstoits

switch

leading

first

so

that

U5a.

toggles

from

normal

except

C3.

state,

The

reset

release),

edge

Ulb.

became

flip-flop'sQoutput

Now,

high,

+12

completing

turnoffofthe

that

Again,

a'low

with

itsQoutput

clock

U5a

transistor

Kl

itsQpin

of

the

high

At

some

earlier

available,ithad

with

the

turningonU5a

voltstoground.

the

high

Ulb

does

the

POWER

pulsetoUla,

itsQoutput

revertstohigh,

inputtoUlb.

to

toggle

turns

wiper

accordingly

state

reverts

constitutesaclock

clock

capacity

+12

not

(about

to

time,

pulsed

wasalow

input

and

thus

The

volt

experienceareset

input,

0.2

second

high,

when

shutting

+12

through

that

to

Ulb

going

completing

Kl

relay

circuittothe

accordingly

the

switchismomentarily

going

This

from

off,

10.

its

opens.

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low.

the

second

causes

After

leading

clock

high

the

input

volt

C3

switched

high,

the

action

high

Ula

to

edge

input

to

Kl

coil

(<

3-49

3-14.

Main

Board

B.

Voltage

the

nominal

is

from

against

and

volts

outputatU6,

the

The

the

Circuitry

Supply.

defibrillator

+12

volts

tapped

charger

CR18.

basesoftwo

outputatthe

base-emitter

from

transient

The

to

monochip

input

channeledtomonochips

tively.

the

+12 tiometer pin7as

in U4.

C.

Control

centerinmonochips

areaready

to

two

lation.

flip-flop,

U6

isacharge

U6

providesinaddition,a+7

volts.

R7,

adjusted

the

reference

Initialization.

oscillator

selectable

StagesinU4

andanenergy-level

(continued)

The

control

module

for

the

load

(J3-3).

after

overvoltagesisprovidedbyZener

+5

volt

U6,

supplyisderived

which

6.

This

emitter-follower

emittersisconsequently

diode

drop,or5

U6,U4and

and

indicatorDCloads

are

supplied

POWER,

SYNC,

from

and

sideoffuseF2and

The

nominal

filteringinLI

producesaregulated

+5.7

volts

transistorsinparallel,

volts.

U2,

+12

and

from

is

That5volts

pins5,14

the

CHARGE

applied

the

volt

OutputtedatU6,

7,

it

is

theretoabout6volts,

U2S

andaflip-flop

modes:

voltage

The

U4,

synchronized

includeadump

for

control

and

U6.

the

energy-level

functions

Principal

whose

cardioversionordefibril

relay

comparator.Aprincipal

oscillator.

throughout

main

supplied

volts

C15.

applicationof+12

5.7

supply

board.

switch

directly

is

derived

Protection

diodes

+5.7

to

and

volt

volts

is

12

respec

derived

The

lamps

CR15

U5b&c.

minus

from

appliedtopoten and

appliedtoU4,

comparator

on

the

board

stagesinU2

two

states

correspond

flip-flop,acharge

feature

of

J

^

v 7

As

of

POWER

U2 and U4.

It

dump

to

of

will

D.

Active

energy

depressing

charge

grounds

to

charge

to

high,

caus.es

J3-6,togo

also

has

their

partofthe

Ulb

during

switch

resets

flip-floptode-energized

non-charge

Ulb

goes

have

Control.

storage

buttononthe

common

the

charge

state,

its

energized

appliedtothe

those

turn-on

and

until

acts

the

high

stabilized

as

sync/defib

state.

ensures

After

capacitor

either

the

point

flip-flop

which

state.

units

low.

In

process,

shortly

an

reset

flip-floptodefibrillation

state,

Holding

before

Ulb-Q

can

CHARGE

adult

Jl-4,

at

causes

these

that

the

active

has

begin.

switchonthe

apex

J2-7.

U4,

the

dump

Asaresult,

basesoftransistors

to

conduct

and

consequence,

tiedtoJ3-6,isenergized.

passively

normally

allowed

closed

the

relay

position

that

the

low

appearingatQ

after

pulse

the

to

the

and

states

first

the

until

+12,+7and

control

gone

high,

That

is

chargeupofthe

processisstarted

front

external

This

13.

flip-flopinU4

paddle.

constitutesaset

That

U4,

pin3goes

U5d

thus

the

Until

high-voltage

their

transfer

now,

completesa100K

terminal

depressionofthe

flip-flops

charge

theQterminal

+5

volt

entered.

in

mode,

the

flip-flop

supplies

panelorthe

Either

action

input

unit

switches

to

transition

to

high.

and

U5e

in

parallel,

collectors,

relay

the

coil,

contactstostay

tied

dump

coil,

de-energized,

ohm

resistor

high-

by

the

That

to

in

^

\ 1

3-50

3-14.

Main

D.

Board

Active

Circuitry

Control

(continued)

g

path

connected

provision

has

across

ensured

drainedofcharge

instrument relay

will

drain

the

dump

the

bleed

In

transitioningtocharge

relay

a

high

thence

called

builds

imately

U6,

pin3ordering

initiate

*

delay ohm

shunt

The

oscillator

exceeds

with

time.

mentary

then

complete

paralleled

positive

low

failure,

and

passive

offafull

coil

to

energize,

(+5

to

having

path

so

volts)

capacitor

signalCD&

until,

3.5

energy

gives

volts.

the

from

after

the

in

+3.5

volts,

That

form

at

forashorter

one

cycle.

transistors

and

essentially

storage dump

U6,

the

high-energy

that

the

capacitor

and

therefore

with

closing

that

the

through

C21.

RLI

At

the

storage

U6,

output,

consequent

of

charge

been

energized,

subsequent

charge

internal

As

(charge

about

100

that

oscillatorinU6

capacitor

coil

sufficient

commandedonwhen

providesasquare-wave

appearingatU6,

8),

variable

Each

50-usec

U3a

shorting

safe.

the

100K

within

capacitor charge-up

state

and

flip-flop

C21

charges,

delay

milliseconds,

level

capacitor

goes

it

charge-up.

high

period

high

and

U3b,

Ql

storage

capacitor.

initially

is

(Incidentally,

de-energizingofthe

ohm

20

seconds).

the

100K

thereby

has,

path

across

Now,

ohm

dump

signaling

in

addition,

resistancetoU4,

the

voltage

and

ready

constitutesacommand

to

time

to

before

the

for

50

(about

from

thereby

collector

light

it

exceeds

operate

The

disconnect

charge-up

signal

output

10

and

100

to

unsymmetrical

(and

microseconds,

20

to

30

U6,

10

driving

to

Ql

ground.

This

essentially

power

or

dump

the

capacitor,

however,

relay

may

the

opens

proceed.

dump

applied

11

and

across

it

interface^

approx

via

thereby

millisecond

the

100K

begins.

U6,

3

in

comple

usee)

turns

to

on

base

During

1-2

the

of Tl

maximum

flux

buildup

winding

of

this

During

emitter

phase

high

from

8

high

be

voltage

negative

almost in

the

of

to

low

turns

shorted

immediately.

Tl

inducesahigh

endpoint

veyed

passes

through

50-usec,

increases

current

has

end

point6goes

negative

50

microseconds,C9has

signal

the

oscillation

low

and

to

high.

on

through

across

pulse

Tl-6

going

CR2

the

DC

current

from

zero

producesalarge

inducedalarge

negative.

voltage

of

Ql.

its

complement

The

transistor

U3c

C9

cannot

to the

to

J5,

After

begins,

significant

U3c,

collectortoground.

change

base

of

The

consequent

voltage

positive.Aresultant

and

output

the

normally

closed

through

to

Ql

magnetic

voltage

the

charged

the

50

with

terminal,

result

causing

instantly,

Ql,

turning

in

Tl

secondary

jack

J5.

contacts

primary

saturation

flux

in

Tl

Diode

high-voltage

usee

U6,

CR2

up

period

U6,

is

C9

positive

prevents

via

10

that

Inasmuch

the

that

quick

collapse

with

current

From

there,

of

winding

level.

in

Tl

secondary,

This

core.

coupling

connector.

the

base-to-

ends,

changing

the

8,

switching

the

U6,

plate

as

result

transistor

is

of

the

winding

pulse

off

board,

the

transfer

The

so

that

reverse

from

to

the

a

off

flux

is

con

relay

it

3-51

Jan.

1979

3-14.

Main

Board

D.

Active

and

capacitor.

through

relay,

As

secondaryisinductively

ground,

to

appliedtopin

turn-on

When

50-usec

current

Circuitry

Control

is

stored

The

another

and

thence

longasthe

the

magnitudeofthe

the

drop

across

line

all

the

on-period

ceases

(continued)

as an

discharging

16,

low

energy

in

(continued)

incremental

return

pathisthrough

setofnormally

charge

closed

on

the

series

contactsonthe

backtogroundatJ3-8onthe

currentisflowing,

driven

conducting

ofU6maintains

as

longasthe

storedasTl

has

been

Tl

secondary.

negative

diode

the

negative

with

voltage

CR6.

turn-off

condition

This

fluxasa

transferredtothe

energy

inductor

storage

LI,

transfer

main

terminal5of

respect

being

board.

to

limited

negative

line

high

endures.

resultofthe

storage

capacitor,

Tl

signal,

and

the

Consequently,

signaltoU6,

tained

for

Tl-5

pin16ends.

an

dependsonthe

14

of

U6.

During

value

long

lations in Tl.

In

25

the

on-off

to cretely

300

charging

voltage

the

This

SELECT

interconnected

potential

the

setting,

SELECT

then

or

to

wiring

such

that

enough

all,

usee.

RC

(about10usee)todamp

the

off

The

turn-on

circuit

charging

charge

the

storage

selectable

or

400

joules).

processisstopped

across

desired

amount of

quantityisselectedbyappropriate

switchonthe

end

of

voltageonthe

the

switched

switch

back

Jl-7

(dependingonjoule

ground

harness

wiper

through via

J2-8

revertstoground

The

additional,

fixed

valuesofR5,

calibration,

the

fixed

("flyback")

final

phaseofa

phaseisset

externaltoU6,

cycles

suchasthe

capacitor

energy

levels

An

optional,

when

the

capacitor

joules.

front

to

the

main

52

megohm

energy

andaselected

panel.

board

resistorRlwhose

storage

path

from

interconnect

range).

and

J3-2

respectively

and

the

paddle

potential;

turn-off

period.

RM3,

and

potentiometerR5is

portionofthe

to

15.

one

phase,

This

C18

out

energy-dissipating

charging

50

usee

Thousands

just

fixed

connectedtopins1and

off

by

describedisrequired

stepwisetoone

(5,

10,

20,

30,

tenth

the

levelis500

incrementally

reachesamagnitude

settingofthe

The

wiper

at Jl-8and

of

thus

high

capacitor.

Jl-8

passes

resistoronthe

wiringtothe

Those

and

connectors.

In

through

main

two

points

interlocksonthe

i.e.,

the

negative

however,issus

period

adjustedtoa

phase

lasts

oscil

cycle

of

lasts

about

adjustingR6in

of

successive

nine

dis

50,

100,

joules.

200,

The

increasing

corresponding

ENERGY

the

switch

to the low

end

senses

any

given

the

control

is

ENERGY

panel,

boardatJl-6

are

connected

to

3-52

Jan.

1979

3-14.

Main

Board

D.

Active

The

voltage voltage, 52

megohms,

on the

at

J5

comparator.

6.2

volts,

7.

When

switches,

flip-flop

its

halts.

U6

has

up

oscillator

has

also flip-flop two

concurrent

respectively,

U2.

the

LED

period. a

ground-level

to

light

progress,

1

Hz

capacitor

Circuitry

Control

at

that

whereRis

control

is

conveyedtomonochip

obtained

the

signal

causing

drops

(continued)

Jl-8

proportion

panel.

The

isasmall

comparator

from

climbs

the

CD &

greater-than

level.

operating.

While

remained

Each

lamp

Each

for

frequency

This

the

high

was

in

U4

was

highs,

and

positive

on

the

negative

output,

that

both

C7.

lights

is

causes

In

consequence,

charging

commandedtooperate.

high,

commanded

theretostartasquare-wave1Hz

half

apex

0.5

determined

equaling

the

resistance

That

fraction

reference

potentiometer

to

this

charge

RLI

3.5

the

process

at

the

level

at

the

conveyed

cycle,

paddle

half

cycle,

causes

second

will

blinkonand

proportion

the

U4,

reference

flip-flop

signal

volt

output

level

charge-up

charging

has

it

level

to

its

to

monochip

appearing

to

light

appearing

the

CHARGE

period.

by

U2

internal

of ratio of

of the

5,

voltage

R7

in U4 to

betweenRand

the

increasing

the

and

level,

at

(typical

oscillator

of

been

proceeding

switched

Meanwhile

it

attained

energized

U2,

at

for

lamp

Thus

during

off

onceasecond.

elements

the

storage

Selected

signal

is

applied

U4,

input

approximately

comparator

reset.

5V)

in

the

storage

to

when

v/hen state. pin

10

oscillator

8 of

that

at

on

the

0.5

6 of

the

capacitor

R+

resistor

voltage

to

U4,

The

11,

from

to

the

U6

to

capacitor

the

charge-

3 of

the

dump

These

and

9

U2,

causes

second

U2

front

charging

plus

a

output

reset

2 of

U4

in

as

panel

The

When

the

charge-up

selected

Pins8and6will

steady

subsequently

bleeds 5%,

exceeded condition. until

lighting

down

the

energy

either

joule

and

re-initiationofthe

switch

E.

Defibrillation

is

applied

In

in

that

is

defib

to mode,

rotated

mode,

the

(indicatedbysteady

can

command

by

depressing

paddles

or

the

oscillator

level

of

before

sufficiently

level

the

In

that

the

having

go

fixed

both

application

comparator

case,

desired

charge-up

or

the

Discharge.

4 of

SYNC

when

lamp

the

selected

lightingofthe

its

dischargetothe

both

discharge

single

switch

3-53

been

high

the

CHARGE

to

drop

output

the

charge

main

While

U2

on

the

is

commanded

reached,

and

low

lamp

of

the

capacitor

hysteresis

will

charge

indicator

level

process,

power

maintainsasteady

is

the

front

amount

sync/defib

charge

patient.

switches

on

the

simultaneouslyonthe

control

to

respectively,

and

the

stored

lag

revert

is

restored

or

the

turned

panel,

of

energy

lamps),

The

panel.

cease

2 of

apex

charge,

voltage

of 5%

to

not

lamps

after

energy

off.

flip-flop

high

keeps

has

command

operating,

U6

goes

causing

lamp.

that

more

will

be

ready

blink,

operator

select

which,

that

been

the

is

Jan-

lamp

stored

operator

effected

^79

the

low.

If

charge

than

in

U2

off.

external

3-14.

Main

Board

E.

Defibrillation

Discharge

at

energy

single

state

shot

plishes

the

instrumentisused.

this

sync

Circuitry

switch

U4,

level shot

of

about

flip-flop,

four

sync-defib

reset

mode,

(b)atU2b,

that

flip-flopinon

sequent

U3d,

through

in

storage

whichinturn

J3-7toenergize

U4,

the

(continued)

Discharge

despression

16,

traversesatransfer-enable

comparator

multivibratorinU4

200-millisecond

going

things:

flip-floptodefib

is

academic.

resets

the

pin6,the

capacitor

200-msec

flip-floptode-energized

to

shunt

appliedtothe

before

the

energy

patient.

any

significant

(continued)

grounds

J2-3.

outputishigh)

to

transitiontoits

duration.

highatU4,

(a)

appliedtoU2,

(With

the

The

pin9for

mode

instrument

same

action,

instrumenttothe

set

inputofthe

status

turnsontransistor

singleshot

storage

during

the

discharge,

the

transfer

output

state.

This

capacitor

The

dischargeisaccomplished,

amountofthe

(c)itturnsontransistor

relay

resets

evenasthe

energyisbled

This

ground,

gateinU4

and

causes

the

setorhigh

The

output

the

16,itactstoreset

for

the

however,

safe

mode

on-off

flip-flop,itholds

transients

Q2,

transmittingalow

and

the

causes

the

of

200-msec

time

occurring

for

causedbysub

(d)

internally

dump

bleed

charge

down.

appearing

(when

the

transfer

the

single

accom

the

mode,

in

use.)

resistor

is

however,

/^jjk

The

energizingofthe

and

inductor

relay

pins6and9,thencetopaddle

andonto

In

addition,

closed

ECG

disconnecting

F.

Synchronized

the

automatic

sync/defib

the

defibrillator

both

are

defibrillation

on

the

front

In

that

switch

statesitis

+2

the

low,

U2,

U4,

toggles

volts

flip-floptosync

causing

pin2goes

pin1,disables

received.

at

J4-2,

combination

the

paddle

the

"Quik-Look"

the

Cardioversion.

turn-on

flip-flopinU2todefibrillation

turned

panel.

joint

configuration,

in

from

the

The

appearsasa

whichisappliedtotwo

transfer

via

the

electrodes.

energizingofthe

contactsonthe

monitor

preamplifier

When

sequences,asexplained

and

monitor modules

on,

mode

either

can

synchronized

be

selectedbymeans

each

the

defib/sync

to

the

opposite

paneltoJl-13

status,

SYNC

hightoabout

systole

lamptolight.

+4.3

the

transfer

pulse,

+5

volt

circuits;

relay

connects

relay

DPDT

connector

transfer

from

the

defibrillatorisused

are

cardioversion

momentary

flip-flop

state.

and

its

outputatU2,

volts.

gate

received

signalof10

(a)

from

Switch

via

C12asa

Moreover,

untilasystole

from

appearingatU2,

the

storage

wipers

pins

relay

the

mode.

connected

opens

relay,

paddle

earlier,

of

the

to

Jl-11

However,

together

SYNC

capacitor

transfer

and

normally

thus

electrodes.

set

mode

switch

depressionofthe

whicheverofthe two

depression

clock

applies

pulse

pin4goes

itsQoutput

The

high,

applied

pulse

the

monitor

millisecond

interface

duration,

pin3,it

Jl-8,

alone,

the

when

and

or

SYNC

to

steady

at

to

is

/^

^ /

3-54

3-14.

Main

F.

Board

Synchronized

Circuitry

Cardioversion

(continued)

a

turns

10

to

the

msec

U2,

SYNC

is

lengthenedto80-100

1).

approximate the

systole

the

10-msec

the

transfer

As

in

defib

charge

discharge the

ready

switchorswitches

transfer

flip-floptoits

results

of

R-wave.

G.

Energy

while

to be

operator.

The

rotation

the

voltage

ground.

The

U4,

U4

the

to

as

in

the

stored

Level

the

storage

the

previously

dumped

energy

and

The

selected

from

wiperisin

circuit

division

The

voltageatU4,

5,

input

is

caused

dump

non-charge

flip-floptode-energized

capacitorisdumped,

is

suspended.

position,

normal

lamp

0.1 signals

5-volt

gate

mode,

condition.

gate.

defib

off

The

visible

second

per

are

pulseisone

in

U4.

another

The

200

millisecond

mode;

for80to

being

When

subsequent

chargeisnow

Change.

If

the

capacitorischargingupor

selected

charge-uptothe

sequenceisas

switchonthe

one

settingtoanother

transit.

between

the

low

resistorsinthe

undivided

high

pin5,quickly

exceeds

to

transition.

status.

Asaresult,

and

When

the

select

sequencing

100

milliseconds

msecasthe

blinking

heart

beat

off

informs

received;

of

the

coincident

requisite

the

sends

enabling

gateisenabled,

the

discharge

transitionofthe

with

the

in

synchronization

operator

level,

new

follows:

Switch

end

state

rotation

of

accomplishes

exception

selectsanew

that

charge

limit

front

panelisof

opens

52

megohm

energy

voltageisapplied

risesto+8

about8volts,

The

changed

an

status

the

energyinthe

if

charging

switchisthen

resumes.

was

(in

effectofC6

of

the

lamp

the

operator

(b)

appearingatU4,

conditions

the

transfer

depressing

command

the

that

the

with

the

energy

afterithas

stored

will

the

be

institutedbythe

wiper

therefore

resistorRland

select

switch

throughRlto

voltsormore.

energy

comparator

and

in

progress,

dump

the

charge

placed

U2,

the

connected

for

that

enabling

gate

the

through

single-shot

same

discharge

detected

level

charged

earlier

the

circuit

briefly

type

will

where

while

opens

the

circuit

C4.

When

comparator

output

resets

flip-flop

storage

the

charging

anew

onaset

15,

is

to

in

the

H.

500

energy

unit,a500

a

500

resistor

the

switch

With

circuitinU4

(See

Joule

storage

joule

for

energy

and

the

instrumentonbut

Figure

Option.

When

the

500

capacitorisemployed

joule

switchisaddedtothe

voltage

select

the

3-17).

settingisaddedtothe

divisionatJl-8.

switchisin

500

JOULE

produces

With

switch

before

+1.5

voltsatthe

the

energy

3-55 Jan. 1979

Joule

front

500

joule

must

charging

select

optionisinstalled,a46

insteadofthe

energy

panel,

To

initiate

position,

be

depressed

starts,

comparator

switchin500

standard36uf

select

as

is

switch,

an

appropriate

charging

both

the

CHARGE

simultaneously.

the

comparator

input,

U4,

JOULE

uf and

when

setting

5

3-14.

Main

H.

Board

500

that

500

to

Circuitry

Joule

+1.5

Joule

Jl-5onthe

(continued)

Option

voltsisconveyed

position

(continued)

via

voltage-division

main

board

and

Jl-8,

the

select

resistor,

thencetoU4,

and

switch

wiper,

interconnect

12.

C

the^

wiring

With

the

+1.5

to

U4,

13,byactuationofeither

inhibited.

Actuationofthe

voltsatU4,

voltstogroundsothat

switch,

charge

PCB

+

HARNESS

Jl

(the

charge

flip-flopinU4

I

20K

with

commandatU4,

to

>

J5

i

300K

+12

12,acharge

500

JOULE

concurrent

charge

state.

6

command,

charge

switch,

switch

will

inputted

will

short

actuationofeither

13),

now

gated,

^

500

JOULE

SWITCH

will

->T0Ji-5

CHARGE

INHIBIT

be

the

+1.5

charge

set

the

PADDLE CONN.

FIGURE

Interlocks.

ground,

in

the

in

EXTERNAL

PADDLES

3-17.

establishing

main

PADDLE

Figure

board

energy

i

INTERLOCKS

3-17

shows

the

voltage

level

3-56

n

PATHTOGROUND

the

paddle

division

comparator.

n,

INTERNAL

PADDLE

interlock

for

energy

paths

to

sensing

c.

3-14.

Main

Board

!•

Interlocks

With

and

Thus,

resistors

and

If

switchisin

through

storage

not

charging

If

storage

via

J.

Battery

(from

voltage

diode

R8

The

actually

In

the

This

of

Circuitry

(continued)

adult

J3-2

the

external

are

the

low

are

100-400

ground

grounded

potential

normally

or

path

any

J2-8

is

broken,inany

capacitoratleast

occur.

the

As

and

ground

discussed

dump

interlock

capacitor,

an

energy

5,

with

select

the

result

Monitoring.

the

battery

levelisdroppedby8.2

and

CR17)

Jl-14

and

to

the

readingofthis

under

calibrating

battery)

reading

full

battery

the

and

correspondstothe

(continued)

paddles

via

employed,

the

jumpersinthe

endsofboth

100-500

through

low

range

grounded

(namely

bank).

J3-2isbroken

setting

high

partly

under

any

chargeonthe

energy

pathisbroken

the

+12

voltsatRN3,

via

switch

that

For

J6-1

pathtoJl-8

chargingisinhibited.

battery

and

condition

the

volts

the

differenceisapplied

BATT

LEVEL

meteronthe

meterissignificant

load,ofthe

meter,

R8

is

+10.5

adjusted

defibrillator

voltsissubstitutedatJ6-1

for

voltage

charge

remains.

main

board

paddle

banksofvoltage

the5to

while

(5-50)orif

range

charged,

storage

setting,

level

but

the

change,

capacitor.

with

pin8,willbeapplied

and

comparator

monitoring,

defib

charger

(the

fixed

through

defibrillator

only

meter

when

charge-up

deflectiontocenter

experienced

points

connectors.

division

50

joule

the

energy

the

ground

and

with

voltage

no

division

this

chargeonthe

the

assembly)

voltage

adjustable

the

when

J2-8

bank

select

path

the

does

will

input

+12

halt

U4,

volts

supply

across

panel.

battery

circuitry.

Zener

resistance

is

(for

scale.

only

20%

3-15.

Defibrillator

three

main

functions:

defibrillator

battery:

Charger

and

automatic

Board.

conversionofline

board;

transfer

The

charging

between

defibrillator

the

AC

115-voltACconfigurationisdescribed

working

doubled;

The

VDC

to

directlytoa

Filtering

to

power

Cl,

TransistorsQland

square-wave

producea20

voltagesatcollectorsofQl,

otherwise

AC

conversion

to

generatea20

12

volts

the

block

C2,

radio

line

frequencies.

and C3 is 150

DC.

oscillator,

kHz

the

involves

kHz

In

the

full-wave

bridge

frequency

output,

VDC.

Q2

and

output

same

square-wave,

initial

bridge

interference;

The

transformerT2are

the

to

Q2

description

rectification

and

step,

employing

series

nominal

the

inductorLIserves

no-load

transistors

transformer

3-57 Jan. 1979

charger

to

DC

for

alternative

the

two

power

below.

and

suffices

to

Cl

150

For

and

(see

VDC,

square-wave

line

AC

diodes

CR1

applicationtothe

power

the

is

board,

source,

sources.

230

C2

should

Figure

use

of

volt

be

3-18).

the

performs

The

option,

150

rectification

applied

through

4.

principally

capacitorsCland2bypass

rectifier

principal

conducting

Tl.

output

across

elementsofa

alternately

to

a

basic

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CRI5

CR5

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=i»-BATT.

LEVEL.

METER

NOTES: UNLESS OTHERWISE

1.

ALL

RESISTORS

2.

ALL

CAPACITORS

FIGURE

5-57

SPECIFIED

ARE

IN

MFD/WVDC.

3-18.

OHMS,

1/4W,

DEFIBRILLATOR

5%.

800041

CHARGER

3-58/3-59

BOARD

SCHEMATIC

Jan

19;

e

•0^\

3-15.

Defibrillator

Charger

Board

(continued)

Ql'sDCpathisfrom

Tl

winding

backtoC3

Q2

collectortoemitter,

provided

ResistorR3sensesQland

a

safe

on

that

In

phase

alternately

Hence,

Tl-3.

halfofTl

other

primary

therefore

and

Q2

not

be

For

square-wave

alternatively

diodes

cation. the

normally

diodes

defibrillator

CR8

and9respectivelyto27

tection for those units.

2-1,

T2

negative

respectivelybyT2

value

(about3amperes),

transistor,

with

the

connectedtothe

the

150V

potentialatTl-2isalternately

By

virtueofautotransformer

primary

half.

approximately

collector.

inadvertently

rectification,asTl

swing

CR8

and

then

The

output, open

capableofconducting

board.

the

primary

lead.

thus

alternate01andQ2conduction,

resultsina

The

Note

grounded

12-volts

CR9

filteredbyL2

contactofrelayKland

Zener

positive

winding

leadofC3

1-3,Qlcollectortoemitter,

Q2'sDCpathisTl

and

R4.

Positive

secondary

Q2

emitter

the

shorting

negative

windings

currents.

positive-going

out

the

sideofthe

action,animposed

voltageofequal

peak

voltage

300V,asis

acrossTlprimary

the

peak

thatC3negative

during

negative

alternately

test

secondary

with

conduct,

and

C6,is+12

the10ampere

diodes

volts

CR16

and17limit

and

thus

(the

voltage

winding

feedback

6-5

If

2-3,T2winding

for

Ql

and

6-7.

this

current

baseofQ3

base

driveofQl

points

+150

referencedtoTl-1

volt

voltage

magnitude

winding

voltage

leadisnot

connection.

winding

betweenQlcollector

grounded

points10and

respecttocenter

providing

full

volts,

J2-4.

load

CR8

& 9

current

requiredbythe

reverse

provide

reverse

supply)

R3,

and

Q2

exceeds

will

and

Q2.

Tl-1

and

supply

across

1-3

and

tap

11,

wave

rectifi

appearing

are

Schottky voltages

breakdown

through

and

4-2,

is

turn

Tl-3

are

voltage.

and

the

is

should

12

between

across

pro

As

soonasAC

half-wave

relay

open

At

Kl.

contactofKl

startuporwithnoloadonTl

inducedinTl

example

base.

current,

that

Some

conveyed

drivingQlbase

progressively

As

Ql

current

toward

The

zero

lesseningofbase

ThusT2flux

change

rapidly

begins

polarity.Q2base

from

anew.

line

voltageisappliedtothe

rectifiedbyCR12

The

energized

to

J2-4

winding

this

resulting

4-9byflux

winding

small

throughT2winding

further

re-occur,

approaches

positive.

causingQlto

andsotherefore

driveinturn

startstodrop,

zero

toward

and

appliedtothe

coil

then

causes

as

outputtothe

secondary,asmall

change

4-9

voltageisappliedinpositive

current

will

1-3,

This

saturation,

does

its

the

reverses

causing

becomes

saturation.

the

positive

WithQsaturation,

3-60 Jan. 1979

bridge

48VDC

wiperCto

main

rectifier

actuating

connect

board.

transient

throughTlwinding

begin

throughQlcollector.

inducesinwinding

positive

be

forced

rate

feedback

rapidlytosaturation.

of

increase

cycle

diminishes

inductionofpositive

the

collector

voltage

andQ2collector

inducedinits

current

the

CR1-4,itis

coil

the

voltage

2-3.

of

normally

is

Assume

for

sensetoQl

That

5-6avoltage

will

voltageatT2-5.

buildup.

windings

current

inverse

mounts

to

cycle

3-15.

Defibrillator

Thus

T2

flux

current

TransformerT2operatesinthe

fact,

foraclose

waveform.

sinusoidal

Asaresult,Tland

the

If

drains

the

and

augmenting

alternative,astep-down

line

voltage

off

normally

12-volt1ampere-hour

output

As

terminal

longasline

connected

charged.

the

24-volt20kHz

consistsofCR7,

DC

to

C7.

transistor

zener

diode,

makeQ5collector

charging

it

current

control

when

panel.

the

Charger

and

the

induced

approximationtothe

Wave

line

squareness

frequencies,

drops

throughKlcoil,

closed

Board

current

the

sharp

T2

out,

contactsothat

(continued)

oscillate

voltage

saturation

and

together

the

allowing

makes

transformer

battery,

point.

voltageisappliedtoKl

from

supplying

The

charging

output

CR8,

The

trickle

Q5.

For

emittertocollector.

current

output

currentisobtained

fromTlwinding

CR9

and

currentismaintainedat100

voltage

regulation,

100

currentisflowing,

that

chargerisdisconnected

will

light

Diode

CR13

the

prevents

and

so

in

step

output

saturated

ideal

relative

are

from

Tl

secondary

flux

density

characteristicofQl&2,

square-wave

high

frequency,

for

efficient

much

lighter

operatingatline

chargeonsmoothing

rapid

the

willbeconnected

through

CR10,

mA.

also

which

PotentiometerR6is

The

servestoturnonQ6

LED

called

battery

from

actuationofKl

alternative

relay,

J2-4

and

through

10-12.

apply

transistorQ7is

R7

drop,

BATTCHGonthe

discharge

line

power.

does

the

Tl

primary

10-12.

region.

transformer

compared

transformer

and

less

This

makes

output

to

action.

bulky

frequency.

than

capacitorC8quickly

wiper

power

from

the

batteryisdis

is

instead

source,

Jl-2tothe

rectification

The

bridge

approximately24volts

mA

by

means

used

adjusted

becauseitindicates

and

pass

to

the

Jl-5

trickle-

of

rectifier

of

as

a

to

through

defibrillator

throughQ5collector

^

( J

3-16.

Test

maintain

Load

Board.

indicator

serves

settings

With

on

the

both

discharge

seeing

either

cathodeofZener

of

CR2

Cl

minus22volts.

Ql

turnsonQ2.

the

collectorofQ2

until

drained,

when

the

to

200

the

paddles

front

discharge

200

indicator

test

that

and

panel,

switches.

voltageisimpressed

approximately

polarity,ispolarizedbyrectifier

is

22

volts,

the

energy

Ql,

Q2

The

test

joulesisdischarged

the

100

areatleast

load

circuit

dark

when

defibrillator

100

restingintheir

the

charged

Either

capacitorisdischargedbydepressing

paddle

acrossRlandR2in

1.3%ofthe

diode

The

CR2

the

voltage

When

R3

conductionofQ2

going

high

storedinCl

and

the

LED

is

input.

positive.

acrossR3is

potential

latches

is

dissipated.

turn

off.

joules

approximately

normal

postponedatleast30secondstoallow

to

be

dissipated.

is

designed

through

stored

the

is

discharged.

charges

correct

locationonthe

maybeon

This

fraction,

bridge

Because

drop

exceeds

lights

Ql.

The

the

voltage

LED

CR1.

Q2

conductionisextended

When

test

dissipatedinRl

to

light

load

at

either

series,

CR1sothat

breakdown

the

and

to

It

energy

(see

Figure

contact

plate.

with

which

maybeof

the

across

thereby select

3-19).

plates

The

R2

voltage

approximately2volts,

In

addition,

that

capacitor

discharge

and

is

must

R2

be

3-61

Jan.

1979

5%.

1/4W,

OHMS,

SPECIFIED

IK

800167

OTHERWISE

ALL RESISTORS ARE

1.

NOTES: UNLESS

ALL CAPACITORS IN MFD/WVDC.

2.

BOARD SCHEMATIC

LOAD

TEST

3-19.

FIGURE

PLATE

(REF)

CONTACT

co

R2L

.6SH

WW

4-1. INTRODUCTION

SECTION

MAINTENANCE

IV

/T$P\

4-2.

4-3.

This

procedures

section

for the

provides

listofrecommended

for

helpinfault

calibration, qualified

tion should

The

section

part

Subsequent

by the DC

GENERAL

The

following

for the

which

cleaning

Warranty.

workmanship

cable

any

products

provided

described

personnel

presentedinSection

be

returned

provides

parts

defibrillator.

instrument.

include

information.

LIFEPAK6is

and

stylus90days.

proper

in

and

is

foraperiod

which

the

isolation.

component

to

organized

general

are

paragraphs

warranty,

provetobe

use

operating

maintenance,

LIFEPAK6instrument.

test

equipment

Troubleshooting,

removal

thoroughly

III.

Physio-Control

into

three

information

presentedbycardioscope/recorder

4-3

through

This

section

test

equipment,

warranted

of

one

Physio-Control

and

maintenance

and

servicing

and

Included

calibration

andatroubleshooting

repair,

shouldbeattempted

familiar

Circuit

applicable

is

against

year

defective

service

with

for

major

4-6

divided

repair

from

the

boards

servicing.

parts.

to

provide

into four major

all

defects

date

will

during

procedures

manual.

circuit

needing

both

general

techniques

of

repairorreplace

the

are

The

delivery:,

herein

is

guide

test

only

descrip

repair

first

units.

followed

information

and

in

parts

warranty

followed

a

and

by

major

topics

and

patient

period,

as

4-4.

All

defective

Control,orits

planationofthe

Service

performed,

Controlorits

Control be cause to void this warranty.

No

other

assume

either

Test

calibration

any

inplied

Equipment.

specific,

other

listed

test

may be

productsorcomponents

authorized

failure.

other

authorized

party

is

authorizedtomake

liability

or

in

Test

of the

LIFEPAK6are

commercially

equipment

used.

than

agents

for

Physio-Control

writing

instruments

available

with

specifications

service

center,

Transportation

stylus

may,

will

be

suitable

listed

test

4-1

must

be

returnedtoPhysio-

withadetailed

charges

must

be

replacement,byother

at

the

discretionofPhysio-

any

other

products.

warranty,orto

No

other

recognized.

for

maintenance

in

Table

instruments

4-1.

are

Although

recommended,

equivalenttothose

ex

prepaid.

than

Physio-

warranty,

and

Physio-Control Lifepak 6 ECG User and service manual

Specifications and Main Features

Frequently Asked Questions

User Manual