IVAC Vital 4200C User manual

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FUNCTIONAL

DESCRIPTION

3.9.2

Battery

When

battery
and

Charger

the

instrument

charger

provides

on.

This

modulated

off.

current
measuring

Voltage
adjustable
set.

This
width

deposited
value.

this

pin

level

by

circuit

(0101),

leases

energy

C106

the

network

The

supplied

current

driving

For

would

the

voltage

15.

increasing

at

Cill

driving

signal.

smooths

limiting

the

feedback

divider,

reference

via

in

example,

cause

U101

the

C106.

and.

frequency-free

this

time.

of

23.4

lock

at

CPU

clock

to

the

injected

When

kHz

23.4
frequency,

CPU

clock,

into

Regulator

is

regulator

operating

is a switching

pass

transistors

L101

through

voltage

the

to

nominally

commutating

voltage

drop

consisting

is

through
allowing

voltage

R114

and

L101

Q101

to

pin

voltage

such

to

maintain

if

the

voltage

at

UlOl

pin

would

R113.

is

kHz.

then

energy

The

switching

When

runs

at

the

instrument

applied

The

stored

23.4

thus

alleviating

the

instrument

(figure

plugged

serves

power

regulator

stores

across

of

R112

R120,

is

15.

feedback

that

the

load

16

with

increase

the

instrument

about

to

Q105,

khz

the

3-25)

in

to

to

to

the

0101

energy

diode 08108

at

the

2

amps

R108

and

R119.

R121

the

output

derived

internally

an

appropriate

the

voltage

were

at

C106

regard

the

in

L101,

frequency

20

kHz.

is

turned

causing

frequency

switching

problems

by

the

an

AC

power

charge
instrument

based
and

when

output

maximum

the

battery
when

on a TL-494

0102

with a pulse

0101

when

side

is

at

pins 1 and 2 of

and

R122

voltage

from

pin

adjusts

amount

across

to

increase

to

decrease,

to

the

reference

pulse

Q105

width

thus

restoring

driving

is

turned

will

on, a differentiated

the

Q101

be

switching frequency

is a submultiple

regulator

caused

switching

by

regulator.

source,

it

is

turned

0101

of

L101.

accomplished

which

to

14

form

be

precisely

of

U101

the

of

energy

C106

at a constant

on

the

decreasing

driving

the

is

off,

the

turned

is

synchronized

asychronous

the

at

all

times

is

turned

regulator

width

on

and re-

is

turned

Output

by

UlOl

via

an

and

pulse

is

regulator,

also

voltage

0101,

voltage

determined

switching

off

at

pulse

of

the

noise

at

to

Q107

the

from

C102

is

charger

AC

is

turning
from

the

included

regulator

power.

drained

off

Q107.

system

to

When

by

When

ground

prevent

to

AC

power

the

regulator

Q107
and

the

ground

is

current

3-62

battery

when

is

disconnected,

and

off,

the

drain

from

the

CR106

regulator

draining

instrument

the

and

RIO1,

cannot

is

voltage

is

occur.

back

through

disconnected

across

effectively

disconnected

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FUNCTIONAL

DESCRIPTION

CIRCUIT

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SECONDARY

3.9.3

CR105

instrument

28
ground

battery

CRLO9
overvoltage
occur

Fuses

Two

tects

the
fuse,
direct

blocks

VDC,

circuits

protects

if

(figure

fuses

against

power

protects

short

the

connected

causing

charger

the

in

case

0101

were

3-25)

are

in

a

distribution

the

to

battery

to

CR106
for

regulator.

fault

ground

U101

battery

of

shorted.

the

battery

to

battery

in

voltage

AC

power,

conduct,

and

and

failure

the

system

and

from

3-64

from

the

biasing

associated

the

rest

of

the

circuit.

power

the

regulator

in

the

associated

battery.

reaching

voltage

circuitry;

of

regulator,

F101, a 2.5 amp

instrument.

C102.

at

C102

0107

on

the

instrument

such

or

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F102, a 5

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FUNCTIONAL

DESCRIPTION

3.9.4

3.9.5

Battery

CR107,
0101
the
Q103

R107,

Charge

0103,

collector,

switching

will

illuminating
thermometer
logic

that

Battery

The

1,

tors.

the

resulting

larly,

LO

the

Status

battery

2,

and

If

junction

if

junction

causing
from
the

voltage

U106

U104 pins 2 and 4 are

logic/analog

at

reference

C115,

ment

setting

(figure

Indicator

C105,

regulator

be

turned

board.

to

port

instrument

Monitor

condition

14.

VRIOl

the

battery

of

in

U106

the

battery

of

R144

pin 2 to

the

junction

voltage.

flip-flop

3-28).

R106,

indicating

on

in

the

charge

This

U40

on

is

operating

(figure

is

provides

voltage

R145

and

pin 1 going

drops

and

R145

go HI

board.

This

(figure

and

C107

that

is

functioning,

this

indicator

also

turns

the

logic/analog

monitored

a
drops

R146

will

HI,

below

will

and

monitored

If

the

of

R143

causes

U103

pins 4 and

3-26)

detect

the

instrument

case,

supplying

on

on

AC

3-27)

by

reference

below

drop

and

11.5

drop

below

U104

pin 2 to
by

voltage

and

R144

U106

pin

the

thus

LED

Q104

board,

power.

three

voltage

11.6

below

U104

volts,

the

the

drops

will

14
10,

switching

is

plugged

charging

current through

on

the

display/

through

R109

signaling

comparators,

to

the

volts,

the

reference

pin 4 going

the

voltage

reference

go

LO.

CPU

through

below

to

drop

go

11.4

below

LO,

disabling

waveform

in

and

the

battery.

to

send

the

U106 pins

compara-

the

voltage

voltage

LO.

Simi-

at

the

voltage

The

signals

port

U40

volts,

the

discharging

the

instru-

at

a

CPU

at

on

the

C115

and

the

pump

summarizes

Table

Battery

Battery

Battery

The

voltage

the

power-on

R147

motor

the

prevent

load,

comparator

3-6.

<

11.6V,

<

11.5V,

<

11.4V,

source

circuit.

short-term

from

Battery

0106-1

U106-2

U106-14

to

the

voltage

turning

reference

Status

Monitor

battery

off

the

thresholds.

=

HI

=

HI

=

LO

status

drops

from,

instrument.

Reference

(i.e.,

(i.e.,

(i.e.,

DEADBAT-

RESET-

monitor

for

Thresholds

LOWBATT-

comes

example,

Table

=

=

=

from

3-6

LO)

LO)

LO)

part

of

3-66

EUNCTIONAL

DESCRIPTION

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해

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TO

BATTERY

0101

Bi,

71494

Figure

3-26.

Battery

3-67

Charge

Indicator

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FUNCTIONAL

DESCRIPTION

3.9.6

Power

The
an
actuate

U102, a JK

tion,
is
debounce

ON/OFF
off,

On/Off

instrument

electro-mechanical

the

flip-flop,

U102

activated.

is

the

switch

U102

will

the Q output,

the

logic

turning

logic

ing

the

The

+12V

3.9.7

The

LO G output

on,

which

the

battery

divider

status

board

on

the

and

-12V

power

and

and

3.9.8.

then

chain

circuitry

Control

is

turned

electronic

toggled

R128,

ON/OFF

activation.

toggle

pin

14,

through

+12V

power

switch

+5V

power

of

U102

turns

status

comparators,

CR1I13,

is

(figure

on

switch.

switching.

is

the

(changes

R127,

switch

C113

If

so

that

will

J1-10

power

supplies

supply,

again

supplies

is

on

0109

R142,

described

3-28)

or

off

However,

main

and

state)

and

apply

the

control

instrument

the Q output,

go

LO.

The

(PWRON)

which

and

powers

will

reverse

are

applied

and

0110

0106 pins

R143,

in

R144,
section

electronically

a

pushbutton

element.

every

U103-11,

a

time

a

Schmitt

clock pulse

was

pin
high Q output
and

to

the

in

turn

up

the

the

above

discussed

through

to

apply

R145,

R133

1,

further

2,

and

3.9.5

rather

is

In

normal

the

ON/OFF

trigger,

to

U102-13

previously

15,

will

is

base

of

enables

instrument.

process.

in

to

0108,

battery

and

14,

R146.

(figure

than

used

to

switch

turned

go

HI

applied

0122,

the

+5

Actuat-

sections

turning

voltage

through

The

battery

3-27).

with

opera-

upon

and

to

it

to

the

The

battery

are

configured

from

being
voltage
will

go

causing

The

LO

U103

pin 3 to

reset
power

pulls

HI

and

The

CPU

via

output

driving

The

on/off

+5VAO

drops
LO.
U103-4

level

U103-4

source.

U103

U103

can

U103

supply

status

as

circuit

an

toggled

below

This

LO is

and

U103-10

from

U103

go

HI,

and

U103-10,

This

action

pin 8 LO,

pin 4 is

turn

U40

the

port

pin 2 LO,

control

discussed

R/S

to

turn

11.4

volts,

coupled

pin

holding

resetting

LO.

instrument

on

the

causing

circuit

in

can

hold

flip-flop

the

instrument

through

to

be

10

is

U102

the

instrument

turns

U103-4

logic/analog

0103

is

always

section

U102

which

the

battery

set

with

coupled

reset

on

0107,

and

off

by

pin 3 to go

active,

3.9.10.

reset.

can

be

on.

status

R147,

discharging

pin

to

0103

and

the

must

be

pulling

U103-10

resetting

board

and

0103-4

set

to

If

the

output

10

LO

and

pin

instrument

connected
CR112

so

0102. This

turning

HI,

resetting

is

powered

and
prevent

battery

C115

pin 4 HI.

1,

causing

LO,

U103

pin

on

Q106,

0103-10

U102

(U106-14)

and

off.

which

to

is

an

10

done

To

AC

is

U102。

by

the

3-69

FUNCTIONAL

DESCRIPTION

3.9.7

3.9.8

+12

Volt

The

+12V

Although

to

+14

volts,

the

instrument

The

pump

own

switch,

The

power
controls
J/K

flip-flop

output,

configured
collector
switch.

The

current

through

Q123

collector

supply)

the

instrument.

+5V

Logic

Supply

supply

labeled

motor

0115

ON/OFF

the

+5V

goes

HI,

as:an

from

flowing

0121

base

causing

Supply

(figure

is

derived

+12V,

depending

is

plugged

is

not

and

switch

Logic

U102

is

and

emitter

Q123

base,

through

and

is

applied

them

(figure

3-29)

directly

the

actual

on

the

in.

powered

Q116,

directly

controls

and

-12V

toggled

current

follower.

also

Q122

Q114 base,

to

U107

to

be

enabled,

3-29)

state

by

supply.

by

flows

turning

from

voltage

of

the

+12V

from

the

+12V

the

ON/OFF

to

the

Current

flows
turning

(+5V

supplying

the

can

battery

supply,

the

supply,

To

turn

switch,

base

then

on

Q123,

through

them

supply)

battery

be

between

charge

but

battery

which

the

of

Q122,

flows

the

R178

on.

The

and

power

via

0123.

about

and

whether

through

via

F101.

in

turn
instrument
U102-15,

which

into

0122

+12

volt

and

also

+12V

from

U108 (-12V

to

the

rest

+11

its

on,

the

0

is

supply

of

The

+5V

supply

instrument,

This

L103

supply

tor.

It

is

tegulator

and

Q121

is

the

diode,

CR117

the 5 volt

0119.
about
the

and

is

Cl44
20

80085

0124.

furnishes

power

is

powered

via

to

very

from

F101.

with a pulse

energy

C136

an

overvoltage

line

and

kHz,

which

clock

storage

serves

in

case

R180

frequency,

most

the

displays,

similar

the

U108

drives

width

as a filter

protection

of a regulator

result
is

synchronized

by a differentiated

of

the

logic

and

power

to

that

of

the

battery voltage

the

pass

transistor,

modulated

inductor,

signal

CR116

capacitor.

diode

to

failure,

in a free-running

to

23.4

Vcc

potentials

to

the

thermometer.

battery charger

or

battery

at a 23.4

is

the

protect

such

switching

commutating

charger

Q119,

kHz

the

items

as a shorted

frequency

kHz, a submultiple

23.4

kHz

pulse

in

the

regula-

via

rate.

Q120

on

of

of

via

3-70

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DESCRIPTION

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FUNCTIONAL

DESCRIPTION

3.10

3.10.1

3.10.2

THERMOMETER

Temperature

The

display/thermometer

ing

system,
vated
Measurement

analog

signal

BCD

ler

As

signal

the
display.

circuit

uController

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2K

timing

writing.

by

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temperature

conditioning

words

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compute

shown

data

in

is

through
The

so

ucontroller

bytes

of

registers,

FUNCTIONS

Measurement

containing

cycle

by

the

and

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block

linearized

thermometer

that

internal

(Ul,

(UL)

ROM,

(figure

of

the

is

initiated.

signal

circuitry

A/D

converter.

display

diagram

and

the

multiplexer,

figure

is

128

bytes

and

I/O

board

its

own

thermometer

to

the

the

converted

module

power

3-33)

an

NSC

of

porting

3-32)

is

an

essentially

hardware

probe

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thermometer

module.

and

is

digitized

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temperature,

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also

on

COP444L

RAM,

to

and

contains

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for

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BCD.

writes

board

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data

and

software.

from

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signal

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FUNCTIONAL

an

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DESCRIPTION

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which

or

to

the

thermometer

or

the

which

G3

register

to

CLK1

the

divided

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of

the

U9

regarding

and

through

selects

digit

be

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probe

senses

is

be

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are

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display

G3)

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read

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when

is.

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the

by

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test

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the

state

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output

when

inputs.for

crystal.

crystal.

to

achieve

This

cycle

within

-

state

inputs

display

into

of

for

that

it

conducts.

Capacitors

The

the

time

the

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DO

digit

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channel,

test

port.

for

the

the

testing

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crystal

16

ensures

through

strobe

or

off)

and

outputs.

data

state

Gl

is

an

automatic

measurement

storage

probe

the

sense

purposes.

on

clock

C10

frequency

microsecond

that

execute

D3

(LSD,

via

U9-13.

(AO

(BO

output

is

well.

signal

Q62,

generator,

and

Cll

the

outputs

GO

is

turn-

G2

causing

is

cycle

at

the

RST

input,

tion.

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DO

through

display

with

LO

through

D3

decimal

C8

and

point

and

L6

L7

R14

are

are

is

3-79

performs

the

the

display

driven

display

from

the

segment
digit
output

power-on

drivers.

SK.

initializa-

drivers.

The

Outputs

FUNCTIONAL

DESCRIPTION

3.10.3

Analog

The

analog

regulator
and

R72;

voltage
probe
Li,

C24,

As

the
thermistor,
leads

U13

from
R72,
U7-5

via

output

fier

R55

and

‘-VDC,

which

U6-11.

The

output

via

R53,

Ul3

compensates

the

thermistor.
voltage

the

bridge
through
top

of

output

with

sponding

Input

and

input

U13;

wide-band

at

U7-7

tip.

Filtering

C18,

and

temperature

Rt,

to a changing

U7-7.

and

the

probe

R71.

These

is

applied

(op

amp)

U7

R54.

This

is

the

voltage

as

well

1.2V

higher

at

R71

R53,

REF,

the

bridge

voltage

0.000V

corresponding

to

42.2°C

Linearizer

and

resistors

choke

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linearly

C23.

of

decreases

voltage

From

the

circuit.

resistors

to

at

pins 5 and

circuit

voltage

from

as to

for the

The

voltage

than
and
and
as

at

U7-7

(108°F).

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linearizer

R53,
Ll;

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noise

the.

probe

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OUT

terminal,

The

the

differential

scales

level

U7-7

U6-11.

nonlinear

regulator

the

R3

of

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OUT

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is

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tip

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are

6.
the

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is

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voltage,

probe.

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increase

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stray

is

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This

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rises,

This

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voltage

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resistance

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The

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(88.0°F)

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R68,

C18,

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to
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by

the

the

versus

always

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voltage

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and

6,

and

R69,

C23,

and

temperature

is

resistance

resistance

the

REF

goes

is

also

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gain

A/D

converter

REF

terminal

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REF,

temperature

maintains

drives

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applied

tip

rises.

respect

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7;

voltage

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C24.

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provided

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at

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analog

by

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the

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ucontroller

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counts
ucontroller

11

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figure

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multiplexer

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reference

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the

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total

voltage

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voltage.
voltage.

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The

zero

adjust

analog circuit
zero.

R84

(ZERO)

adjusted.

The

voltage

2,

4,

is

it is

and | outputs

equivalent

the

significant

[MSD]),

3,

and

The

digits

the

temperature

represents

Every value

107.9°F.

temperature
MSD,
U6

NSD,

operates

conversion.

is

4).

The

level

ones

digit

indicated

do

107.9°F,

from

reading,

and

continuously

circuit

is

zero

is a variable

is

coded

of

to

one

raw

(least

[NSD]),

by

not

indicate

data.

the

000

to

ucontroller

The

LSD

digit

of

U6

volts,

in

U6

(U6-16,

digit

significant

or

the

the

LSD,

the

For

example,

top

and

999

represents

converts
digits

strobes,

at a rate

ensures

the

digital

resistor

three

15,

of

the

digit

hundreds

NSD,

actual

bottom

this

are

indicating

of

FUNCTIONAL

that

output

which

four-bit

1,

and

temperature

[LSD]),

(most

and

MSD

temperature,

000

represents
of

the

a

temperature

raw

output

about

DESCRIPTION

when

can

data

2).

the

of

Each

input

U6 is

be

words

reading.

the

significant

outputs

but

88.0°F

temperature

value

to

sequentially

which

9.5

digit

milliseconds

manually

at

four-bit

tens

(next

of U6

represent

and

from

the

actual

with

is

from

the

also

the

8,

word

Whether

digit

(U6-5,

999

range.

88.0°F

the

present.

per

to

3.10.5

Multiplexer

The

multiplexer

and

display

of

four-bit

Inputs

BO-B3

state.

AO-A3

(U9-3,

AQ

output;

receives
from

the

BO-B3

The

which

outputs

when

controlled

The

R63.

outputs

to

are

multiplexer

four-bit

SEL

OE

input

It

facilitate

(U9,

figure

accepts

test

data

receives

A2

from
data
NSD

two

DO

through

is

by

can

in a high-impedance

(U9-2,

6,

10,

the

from

output.

distinct

select

word,

LO;

the B word

the

of

the

be

driven

signal.

words

5,

and

data

"4"

the

B3

A

D3

GO

output

multiplexer

(U9-4,

HI

testing.

3-35)

digital

Output

at

DO-D3,

11,

and

13)

are

from

output;

MSD

output

receives

four-bit

(SEL),

or

B,

is

of

by

test

state.

information
is

14)
digit

the

"1"

and

the

words.

at

U9-1,

is

sent

7,

9,

selected

the

(U9-15)

equipment

to

the:

are

temperature

strobes

output

АЗ

from

of

U6;

display

acts

to

the

and

12).

when

ucontroller

is

This

allows

from

ucontroller

and

of

U6;

the

Bi

from

test

as a switch

ucontroller
The A word
SEL

(U5-21).

normally.

to

put

simulation

the

the

"8"

the

state.

is

the

A/D

converter

in

the

data.

Inputs

display

Al

from

output.

LSD

output;
A0-A3

to

through

is

HI,

SEL

pulled

multiplexer's

of

form

test

the

"2"

BO

and

pick

selected

is

down

data

B2

by

3-83

FUNCTIONAL

DESCRIPTION

3.10.6

3.10.7

Display

and

uController

strobes,

(DS10

through
junction
indicates

nated

time,

per

five

When

064,
sistors

SK

through

029

signals

for

but

second.

digits

L7

048,

drive

and

and

sink

buffers

053,

from

neously.

(strobed)

through

Watchdog

D3.

Display

outputs

They send

DS14)

with

to

any

the

This

the

the

one

digits

which

DO

through

054, 060,

current

segments

Q41

030

LO

through

The

display

by

the

(The

Circuit

Driver

L7

and

signals

is

to

SK

(decimal

display

digit.

gives

are

which

Only

are

turned

the

illuminated

D3

or

Q61,

from

g

through

and

040,

and

052,

L6

for

which
appropriate
decimal

(figure

point

3-37)

(figure

DO

through

to

the

display

be

illuminated.

point)

segments

one

digit

on

display

constantly.

are

driven

respectively,

the

display

a

and

the

042

and Q39,

023

and 059, and

are

sent

the

display

is

only

3-36)

D3

and

(a

is

and off

the

appearance

HI

one

cathodes.

decimal

to

all

data

is

enable

connected

are

the

indicating

This

LO

through

through

illuminated

in

succession

at a time,

to

conduct.

point,

033

and 047,

024

five
valid

strobes,

display

output

L6

g)

of

LO

through

and 058.

displays

is

enabled

at

DS12.)

enable

which display

works

are

containing

These

respectively,

output

illumi-

at

any

250

they

L6

034

and

The

in

con-

which

given

times

cause

tran-

and

046,

simulta-

L7

and

DO

3.10.8

The

watchdog

ucontroller

watchdog

through

(°F/°C)

selected).

and

function

13,

U8

pins 4 and

yields

C21

circuit

054

or

the

Under
a

‘occurs

charges

thermometer

Normal/Monitor

a.

Normal

Setting

the

ucontroller

the

monitor

δ.

based

The

Monitor

on

predicted

Setting
the

ucontroller

the

normal

equilibriate
display.

MONITOR

circuit

turns

malfunction

constantly

and 060 and

NORMAL

high

5,

/MONITOR

normal

input

and

no

through

resetting

board.

Modes

Mode

the

NORMAL/MONITOR

to

mode.

the

rate

value

Mode

the

NORMAL/MONITOR

to

mode.

and

The

ucontroller

mode

switch through

the

thermometer

causing a loss

receives

061

if

the

mode

conditions,
at

U8

pins 4 and

signal

R57.

(figure

the

is

The

latch

3-37)

mode

use a different

Temperature

of

change

is

reported

use a different

Temperature

is

continuously

detects

signals

S2

switch

C21

received
resulting

and

switch

is

of

the

to

mode

in

switch

the

input

off

of

the

internal

are

remains

5.

However,

at

LO

turning

to

program

estimated

resistivity

the

display.

to

program

probe

monitored

the

state

SI

via

if

digit

from

DIP

closed

discharged

U8

pins

signal

off

normal

than

in

monitor

than

is

and

of

U8-10,

there

strobes.

the

displays

switch

(MONITOR

if a mal-

11, 12,
is
the

mode

that

about

in

that

allowed

updated

the

isa

no.

by

received

display/

causes

used

30

seconds

the

probe.

mode

causes

used

to

to

NORMAL/

The

5

or

Q51

and

°C

at

in

in

the

3-84

FUNCTIONAL

RNIO

10K

8PL

DESCRIPTION

NOTE:

U1

cor

44461

/8 = 8

/5 = 5

SA

LINES

THRU

DA

THRU

LINES

SG.DP

DE

(SA-SG,DP)

(DA-DE)

s

RN4

&PL

10K

5

TO

| i

+

1

I

!

1
to

上

i

i

| i

|

I
1

RES

pe rr

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—

PIO

P16

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P20

P24

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CIM

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OPTION

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Figure

3-36.

Temperature

Display

3-85

and

Display

Driver

3.10.9

32

Internal

DIP

Switch

No. 5 (°F/°C)

FUNCTIONAL

(figure

DESCRIPTION

3-37)

3.10.10

Setting
causes
temperature.

through

The
holes

S2

in

the

the

input

internal

position;

Power

The

Power
supply

The
power

to

Control

power

enters

by

CPU

turns

control

determine

temperature
probe
the

CPU

sense

goes

°F/°C

ucontroller

The

SI

the

bottom,

°C = down

Circuit

control

the

plugging

the
circuit.

when

probe
optics

HI.

Table

DIP

switch

to

use

ycontroller

via

functional

DIP

switch

right-hand

position).

(figure

circuit

consists

thermometer

in a thermometer

thermometer

The

to

power-up

is

plugged

are

turned

(See

table

3-7.

CPU

Monitoring

to

different

detects

(no.5)

3-38)

at

module

CPU

monitors

the

in

on)

3-7.)

°C

(Centigrade)

the

signal

is

accessible

side

of

of

J1-24,

probe

on

thermometer

but

out

the

of

constants

state

from

U8-10.

the

instrument

Q37,

Q38,

J1-24

or

and

off

the

thermometer

of

its

TEMP

signal

Thermometer

or

to

of

the

through

Q45, and

is

connected

tester.

by

board.

well

(U40

°F

(Fahrenheit)

calculate

switch

louver

(°F = up

U8.

to

controlling

probe

When

(i.e.,

Probe

pin

the

the

12)

Well

the

+5V

the

well

from

R/S

flip-flop

pin 9 goes
and

Q45.

v(U7)Y

and

plexer
probe

connector

Depending

methods

8.

By

both

and

probe
LO
HI

Condition

Probe
Probe

U8,

HI,

Q38

supplies

A/D

converter

(U9)

and

on

the

for

activating

removing

the

connector

the

thermometer

causes
transition
and

activating

not

in

well:

pin

9,

power

flows

power

(U6).

ucontroller.
is

plugged

position

the

the

probe

the

CPU

is

coupled

the

in

well:

applies

to

ground

(VA)

Q45

+5THERM

in,

of

the

thermometer:

from

and

probe

is

off).

to

pull

through

thermometer.

CPU

signal

TEMP = HI
TEMP = LO HI

power

to
supplies

and

through

through

the

analog

is

always

supplies

power

power

thermometer

the

storage

are

In

Q57

in

this

drain
C27,

well when

place

case,

to

setting

Q38 and

037,

input

(VP)

present

probe,

(i.e.,

removal

ground.

Q57

Drain

LO

Q45.

saturating

and

to

the

when

to

U8,

there

initially

Q57

of

This

flip-flop

When

038

linearizer

multi-

the

are

two

drain

the

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FUNCTIONAL

DESCRIPTION

3.11

b.

By

inserting

is

empty

through

level.

thermometer.

Application
power

through
ization

The

is

first

R14

to

occur.

thermometer

Alternatively,

causes
U8-9
condition

CIM

The
blocks.

instrument

The

the

to

flip

EQUIPPED

CIM

equipped

These

blocks

ucontroller

through

through

are

thermometer

(i.e.,

R56,

This

delay

of

power
applied,

delays

can

inserting

to

LO.

MODEL

Model

blocks

an

display

the

probe

Q57

and

U8

causes

from

the

rise

be

deactivated

to

The

CR7 and

4200C

4200C

are

an

RS-232

IVAC

CIM

interface

connector

drain

pin 2 is

LO).

U8

045

initializes

VP

goes

HI

of

RST

the

probe

output a LO

ucontroller

CR8

via

contains

designed

port.

II

board, a real-time
port.

when

In

this

held

LO

pin 9 to

and

RST

to

logical

by

removing

into

the

to U8

senses

its

G2

three

to

permit

the

case,

until

become

the

ucontroller.

is

LO,

1,

probe
pins 4 and

the

port.

additional
ASCII

probe

storage

+5V

C27

charges

HI,

activating

Charging

allowing

the

probe

storage

inserted

monitoring

clock,

well

charges

to a HI

When
C8

initial-

connector.

well

5,

causing

probe

functional

of

and

a

027

the

the

3.11.1

CIM

Interface

The

CIM

equipped
which
verters

II

cated
carries

Ul6

loading
access),
a

when

The
upper

an

The

from

operation

The

It's
WR-

contains

to

board

HI

IO

is

connector

only

is a bi-directional

from

and the

to

avoid

Ul6

is

address

eight

transfer.)

read

CIM

or

the

board

timing

RD-.

or
Sl

and

(figure

Model

a

UART,

interface

interfaced

is

the

signals

the

data
data

ambiguous

not

enabled.

lines

address

write

status

HI

is a read

is

selected

is

derived

3-39)

4200C

baud

to

to

in

parallel

bus.
direction

IOA0

and

lines

command

line

from

an

external

the

and

buffer

It

logic

ΤΟΑΙ

copy

to

from

operation.

for

incorporates

rate

generator,

4200C

with

power

is

levels

the
the

an

the

used

enabled

is

are

the

CIM
CPU

I/O

address

required

determined

lower

an

data

gathering

through

the

test

to

isolate

by

on

the

buffered

eight

board
as

IOWR-.

operation

decoder

IVAC

and

J4.

connector

by

the

the

EXTIO-

by

external

ADDR8

address

is

derived

LO

when

CIM

II

RS232

This

system.

16-pin

CIM

CIM

(external

RD-,

bus

and

level

RN2

and

is a write

IOXSEL-

output

board

J5,
II

board.

board

maintains

IODQ-I0D7

ADDR9.

lines

buffered

EXTIO-

con-

The

dedi-

but

I/O

during

is

CIM

(The

LO.

and

+5

Volts

and +12

volts

are

provided

3-88

at

J4

to

operate

the

CIM

board.

FUNCTIONAL

DESCRIPTION

3.11.2

Thermometer

The

thermometer

the

display/thermometer

and

64

bytes
digit
are

code

interface

is

The
can

temperature

The
clock
reset
eter

U10
ture
P25 and

driver

processed

and

four-digit

is

not

compatible

thermometer
occur

with

thermometer

signal

(BRESET)

display

ports

P10-16

display

P26

NORMAL/MONITOR

1-6).

Display

interface

of

RAM.

signals

to

convert

required

with

interface

the

display.

display

(BCLK)

from

interface.

and

segment

monitor

switch

Interface

(U10)

board.

It

decodes

and

thermometer
the

BCD

code

because

the

CPU

interprets

thermometer,

interface
from
the CPU

the

P20-24
and

digit

is

serve

thermometer

and

the

Circuit

is

It

contains

temperature

display
for

transmittal

the

multiplexed

data

as

is

CPU

via

inverted

as

strobe

power

S2

internal

(figure

an

8741A

control
information

bus and

all

possible

well

as

clocked
Ul2,

pin 6 and

to

input ports

signals,
status

DIP

3-40)

satellite

1K

byte

display

signals.

to

to

the

temperature

CPU's

timing.

conditions

the

contents

by

the

initialize

for

respectively.

and P17

switch

`

processor

of

program

segment

These

an

8-bit

CPU.

ROM

and

signals

status

The

display

that

of

the

buffered 3 MHz

4.

Power-on

the

thermom-

the

tempera~

TO,
monitors
settings

the

(nos.

on

Ull

functions

display

tently

kHz).

decimal

clocked

as a pulse

point

at

the

(BDP),

thermometer

stretcher

because

monitoring

the

decimal

ucontroller's

the

temperature

point

clock

is

rate

intermit-

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3.12.2

Blood

The

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perform

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d.

Calibrate

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5.

Figures

Diagnostic

Redisplay

program

3-44)

are

the

about

interrupt.

pressure

together
module
the

inflation

3-42

flow

show

how

START/RESET

every

Program

monitor

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display

pressure

tests

values

through

is

shown

the

683

microseconds.

at

tasks:

or

test

(memory

3-44

in

two

switch

program

load

time.

interrupt

pump-up

mode)

depict

figure

interrupts

and

The

is

Three

processing

program

3-42,

are

the

time

real-time

organized

modules

tasks.

operation.

Flowcharts
processed.

base

interrupt,

clock

=

into

modules

and a segment

The

remainder

The

main

(figures

The

two

occurring

3-43

interrupts

is a third

that

of

and

When

power

failsafe

this

time,

completing

and

other

exits

auto-start

occurs.

motor

longer

hardware

the

While

is

off and

than

is

the

the

data

wait

condition

display a FIX
switches

to

When a blood

enters
and

blood

the

inflate

data-taking

pressure

first

are
program
diagnostics,
values

loop

in

the

that

20

seconds,

ME

message.

see

if

pressure

cycle

and

applied,

executed.

will

and

to

start

is

detected

wait

the

If

the

calibrate

measurement

cycle.

is

returns

software

diagnostics

If a malfunction
display a FIX
the

finally

a

loop,

cuff

either

Also

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program

enters a wait

blood

or

the.

pressure

test

during

mode

has

inflation

initializes

pressure

when

program

does

fails,

wait,
has

been

entered. Finally,

to

the

wait

loop.

ME

message

measurement

the

START/RESET

checks

not

the

it

been

requested,

is

complete,

the

of

memory

is

detected

and

various

loop.

that

exceed

instrument

tests

the

selected.

program

halt.

The

program

when

interrupt

the

20

mmHg

internal

the

program

the

deflate

computes

and

at

Upon

timers

the

pump

for

will

the

3-95

The

START/RESET

function

program

Instead,
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for

example,

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monitors)

the

interrupt.

The
each
organized

example,

the

does

it

The

time-base

time

the
so

the

milliseconds.

returns

tion

instrument
when

to

is

detected.

the

diagnostics

interrupt

operator
not

return

passes

control

START/RESET

during

the

state

interrupt
interrupt

that

microphone

the

each

When

execution

interrupted

The

offline

display

has

control

interrupt

memory

of

program

occurs

branch

signal

time

are

program

requested

to

the

mode.

the

START/RESET

(see

is

is

of a branch
program
base

test

performed.

FUNCTIONAL

(figure

to

the

main
can
In

and

be

memory

3-43)

responds

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disabled;

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switch

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executed

sampled

figure

one

3-44).

periodically.

and

is

completed,

unless a failsafe

interrupt

is

being

is

executed,

determines

accordingly.

location,

at

the
it is

the

instead

of

several

The

processed

disabled

and

DESCRIPTION

what

location

disabled,

program

of

branches

program

For

every

control

error

when

at

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the

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The

polls
using

'

is

two

3.12.3

Hardware

the

Checks

computer

conditions,
condition

displays
fying
meanings

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is

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type

appear

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power

through

only
and L to N are

Tests

-

ing the

value.

tions

expected

listed

on

switch

K

once each

corresponding

value

The

for

input

in

the

failsafe

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tests

table

program

initially

detected,

FIX

ME x message

of

in

the

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on

and off.

W,

time

performed

of

failsafe

corresponding

code

5-1,

input

tests

problem

chapter

at

power-on

the

and

Tests

the

instrument

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5.0.

can

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power

to

the

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Table

is

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messages

failsafe

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the

5-2

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FIX

CIM

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FAILO,

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values

computer

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ME

audibly

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FAILI,

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D

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five

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5,

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3-96

FUNCTIONAL

DESCRIPTION

When
must

value

Example:

the

match

is

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displays
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to

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Pulse

FSDIS

Binary

Octal

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signal.

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The

motor

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the

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the

PULSE

failsafe

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ME

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041

©

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0 1 ο

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good

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signal

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the

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FIX

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particular

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ME

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input

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bit 7 is

match,

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faulty

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run

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FSO

this

off

6

and

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(a

3-97

POWER

DIAGNOSTICS

|

INITIALIZE

T

MOTOR

CUFF

TESTS

BRATION

MODE

SELECTED

ON

t

AND

PRESSURE

CALI

NO

FUNCTIONAL

DO

CALIBRATE

FUNCTION

DESCRIPTION

AUTO

START

INFLATE

DEFLATE

AND

DATA

COMPUTE

BLOOD

AND

YES

COLLECT

|

PRESSURE

PULSE

NO

Figure

3-42.

Main

3-98

Program Flowchart

START/RESET

INTERRUPT

FUNCTIONAL

DESCRIPTION

i ;

Figure 3 -

]

MEMORY

Y

NO

DO

OFF

LINE

YE

DISPLAY

DO

MODE

TEST

MEMORY

FUNCTION

42

Figure 3 -

Figure 3 -

;

42

42

NO

Figure

3-43.

START/RESET

3-99

Interrupts

TIME

.

GO

TO

TIME

Go

+

SAMPLE

RELATIVE

PRESSURE

SLOT

OOLEACH 8 MSEC)

+

PROCESS

RELATIVE

PRESSURE

SIGNAL

RETURN

…

O4{EACH

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To

16

DEFLATE

MSEC}

TIME

BASE

INTERRUPT

1

ATIEACH 2 MSEC)}EXZIEACH

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PRES

(

2

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AND

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Г

RETURN

)

3

O8(EACH 8 MSEC}

TIMERS

|

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SOFTWARE

TIMERS

Y

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MIC

6S

MSEC) | TEST

+

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PROCESS

PHONE

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OTHEA

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SWITCH

SAMPLE

DISPLAY
PUSH

TEST

BUTTON

:

y

RETURN

DESCRIPTION

AND

MICRO-

SIGNAL

)

UPDATE

RETURN

Y

D/A

Figure

3-44.

Time

Base

3-100

BATTERY

DEAD

Oe

MESSAGE MESSAGE 4 SHUT

HALT

PROGRAM

Interrupts

DISPLAY

CHARGE

INSTRUMENT

%

HALT

PROGRAM

BATTERY

OFF

RETURN

-

\

1.0

INTRODUCTION

This

chapter

detailed

4200.
Chapter

For

Three,

contains

system

specific

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M

CHAPTER

FIVE - TROUBLESHOOTING

5.0

INTRODUCTION

This

chapter

instrument

before

save

Should

a.

b.

CAUTION:
shooting

Logic

"HI"

The

a.

b.

attempting

time

a

problem

That

The

integrity

Always follow

this

levels

state,

following

Table

Table

provides

should

and

the

are

and

5-1.

5-2.

repair

to

service,

may

avoid

occur,

instrument

of

instrument.

defined

zero

volts

is

an

outline

FIX

ME

Failsafe

help

the

in

be

necessary.

unnecessary

first

is

being

cuff

static

as a nominal

for a "0,"

to

Alarms

1/0

troubleshooting

Referring

repair,

ensure:

or

repair.

operated

and

cable.

grounding

procedures

potential

"LO,"

the

tables

Ports

the

replace

properly.

or

iù

this

VITALeCHECK

to

this

any

when

of

+5V

logic

chapter:

chapter

component

trouble-

for a "1"

ground.

will

or

ο.

d.

e.

f.

5.

Table

Table

Table

Table

Table

5-3.

BP

System

5-4.

Thermometer

5-5.

Power

5-6.

Logic/Analog

5-7.

Display/Thermometer

Troubleshooting

System

Regulator

Board

Troubleshooting

Board

Voltage

Voltage

Board

Guide

Guide

Specifications

Specifications

Voltage

Specifications

5-1

TROUBLESHOOTING

HARDWARE

This

instrument

these

check

The
this

checks

that

use

section.

section

Tests
CIM

on.

operation,

FIX

writes

for

equipped

Tests

ME

circuit

FAILI

(U-18,

expected

the

information

display.

Table
expected,

Table

5-1

5~2

CHECKS

fail,

failed.

of

the

If a FIX

5.2.

FIX

ME x conditions

instruments)

for

3,

conditions

an

8-bit

response

BDO-7)

value

This

octal

summarizes
correct

shows

performs

the

FIX

ME x messages

4, 5,

A

to K are

word

is

to

is

read

and

not

display,

obtained,

value

the

binary

the

significance

self-diagnostic

CPU

issues

a

for

ME x message

0,

2,

are

run

once

and L to N are

tests

failsafe

back

is

compared

to

of

output

the

the

and

displays

corresponds

alarm
output

messages.

is

shown

of

hardware

FIX

ME x message,

checks.

where

If

any

x

-

troubleshooting

does

not

appear,

and A to K (also W to Z for

when

run

the

CPU

with

CPU

an

to

each

the

periodically

failsafe

port

FAILO

through

an

expected

issues

octal

the

For
in

bit

an

value

8-bit

the

octal

BDO-7

is
continue

instrument

circuit.

(U7,

failsafe

value.

alarm

in

input

failsafe

for

reference.

in

the

explained

is

during

The

FS0-5).

input

If

message

the

PULSE

from

tests,

message.

of

is

the

in

to

the

turned

CPU

The

port

the

to

FAILI.

the

5-2

TROUBLESHOOTING

FIX

Code

0

2

ME

Type

EPROM

memory.

of

RAM

write/read

Attempt

Pump

motor

Cuff

pressure

Initial

(pressure

valve

or

failsafe

failsafe

clear,

test

multiplexer

Test

CRC

check

to

execute

on

power-on

greater

closed,

disconnect

or

incorrect

Table

check

failed.

more

exceeded

state

than

or

pump

disconnect

channel

5-1.

failed.

from

nonexistent

than

320

not

20

motor

flipflop

flipflop

pressure

FIX

100

seconds.

mmHg.

correct

mmHg,

activated,

being

comparator

selected).

ME

Alarms

or

set,

dump

or

held

Expected

Binary

00

110

000

Result

Octal

060

Failure

or

Failure
pump

dump

motor

to

valve

to

Simulated

comparator
simulation

Failsafe

sense
20

(FAILO

Failsafe

clock

00

Failsafe

comparator
simulation

Failsafe
simulation

Port = 00

comparators

mmHg,

Port = 00

loss

001

000).

detect

not

detect
not

able

20

mmHg

failed

(FAILO

20

mmHg

less than

clock

335

4.5

loss;

simulation

mmHg

failed

(FAILO

minute

timed

011

010).

dump

valve

able

pump

to

to

motor
be

pressure

less
Port = 00

and

failed

000

pressure

greater
Port = 00

out

than

335

335

mmHg

010).

watchdog

(FAILO

timer

prematurely

closure

be

closed.

on

turned

sense

20
000

mmHg

pressure

greater

simulation

Port

sense

than

O11

high

or

on.

mmHg

001).

than

failed

=

335

011).

speed

(FAILO

mmHg

00

00

00

00

01

01

00

010

100

110

111

110

111

111

000

000

001

010

000

O11

010

020

040

061

072

160

173

072

TROUBLESHOOTING

Failsafe

simulation

.

required

Failsafe

lock

conclusion

(FAILO

Failsafe

to

be

testing

Pump
at

idle

Pressure exceeded

20

seconds

Failsafe
comparator

upon

1/0

interface

4.5

time

1/0

on

command

Port = 00

disconnect

reset

(FAILO

not

off

state.

pressure

cuff

failure

failed

of

at

failed

inflation.

(U10) and

minute

(FAILO

port

from

power-on

100

by

the

Port = 00

or

dump

idle

between

timer

to

time
Port = 00

failed

the

101).

flipflop

CPU

valve

20

mmHg

state.

sense
to

detect

52-6

the

the

high

out

within

to

write-

CPU

at

failsafe

failed

during

000

power-on

100).

not

more than

20

mmHg

pressure

probably

thermometer

CPU.

speed

011

010).

the

testing

open

open.

the

01

00

00

00

00

111

010

110

000

110

100

110

000

110 000

172

060

064

060

060

RAM

or

interface

Failure

(U10)

to

display

Failure

(U10)

to

display

ROM

failure

(U10).

of

the

properly

segments

of

the

properly

segments

in

the

thermometer

read

or

the

digits

thermometer

read

or

the

digit

thermometer

interface

temperature

strobes.

interface

temperature

strobes,

TROUBLESHOOTING

Failsafe

Bit

Mnemonic

Failsafe

Input

7
0

FSDIS

FSDUMP

FSMOT

FSCOMP

FS2~FS0

Output

Port

(FAILI):

6 /

FSDIS

0 = Failsafe

1 = Alarm

0 = Dumper

1 = Dumper

O =

1 = Pump

0 = Pressure

.

1 = Pressure

Port

Table

hardware

Pump

See

(FAILO):

5-2.

Failsafe

U18

1/0

5 4
FSDUMP © FSMOT | FSCOMP

OK

condition,

closed

open

on
off

output

less

greater

(changes

than

system

20

than

during

U7

Ports

3

disconnected

mmHg

20

mmHg

testing)

/ 2

FS2 FSI #50

by

failsafe

1

0

Bit

Mnemonic

7

.

0 0

FS5

FS4

0 0

0

1
1 1

FS2

#51,

FSO

FS1

0 0
0

1

1 1

6 /

1 = Disconnect

FS3-

=

1

0

=
=

=

1 = Reset

flipflop,

select inputs

FS0

=

1

0

=

=

=

5
FS5

failsafe

Clock

No

90

375
Both

Select

clock

Hz

clock

Hz

clocks

to

pressure

Selected

Actual

Simulated

Simulated

Simulated

4
FS4

clock

FSDIS

Cuff

cuff

less than

between

pressure

3
FS3-

from

software

(when

comparators

Pressure

pressire

20

20

of

under

(APS)

mmHg

and

more

/ 2

control

software

335

mmHg

than

FS2

335

1

-FS1

control)

mmHg

0
FSO

5-5

The

following

5-2.

The

CPU

Chapter

simulate
compares

with

system,

and

displays

an

example

exercises
Three,

conditions
the

value

expected

the

CPU

an

illustrates

the

failsafe circuits

section

of

3.8

for

the

value.

issues

an

octal value

and

testing

failsafe

If

the

alarm

in

use

3.12.3.

is

FAILO
input

expected

message

the

PULSE

of

the

on

The

port

value

to

display.

failsafe

start-up
output

(U7,

the

as

port used

FS0-5).
FAILI

is

information

(U18,

not

TROUBLESHOOTING

tables,

5-1

discussed

to

The

CPU
BDATAO-7)

read from

display,

and

in

the

5.2

During
simulate

R19,
through
reset
software

failsafe

(step
(173)

the

U27,

start-up

a

R23,

R30,

the

from

overpressure

backup

e).

If

input

failsafe

U38,

or

pressure

375

flip/flop

from

TROUBLESHOOTING

If a FIX

instrument.

a

functional

ment

thermometer

The

for

conditions,
circuit boards.

ME

system.

remainder

circuit

message

Use

function.

and

and

test

G,

of

and

R37.

kHz

clock

U25.

detect

is

tested

the

microprocessor
Ui8,

it

overpressure

one

of

the

GUIDES

is

table

problem
Use

of

table

the

5-3

can

tables

component

reference

the

microprocessor

greater

than

Simultaneously,

to

counter

This

simulates

flag

as

described

fails.

alarms

FIX

circuit.

surrounding

not

displayed,

if

the

instrument

be

localized

5-4

if a functional

in

this

level

voltages

troubleshooting.

335

017.

is

disabled

in

to

ME

G,

Suspect

resistors.

observe

to

chapter

are

provided

makes

mmHg,

it

uses

FS2

a

situation

Chapter

obtain

indicating

components

is

the

blood

problem

serve

FSO

using

is

and

the

inoperative

resistor

FS3

and

LO,

the

Three,

the

required

operation

pressure
resides

as

Test

for

each

and

FS1

FS4
removing
in

which

hardware

section

a

problem

might

and/or

reference

points,

of

HI

to

ladder

to

pass
the
the

01111011

with

include

of

the

measure-

in

the

guides

test

the

3.8

if

5-6

TROUBLESHOOTING

Problem

Instrument

erative,
is

on

Instrument
erative

from

when

AC

but

when

(battery

Instrument

inoperative.

completely

charge

connected

completely

disconnected

only).

completely

inop-

light

to

inop-

AC.

Table

Probable

Blown

Cause

fuse

Defective

microprocessor

Dead

Blown

Battery

Battery

Dead
dead

or

defective

fuse

pack

trip

electrical

battery.

5-3,

Instrument

F101.

6

MHz

F102.

connectors

adjustment.

BP

System

crystal

inoperative.

battery

outlet

and

Troubleshooting

Malfunction

or

pack.

loose.

Guide

Solution

Replace

shorted

Check

logic/analog

but

U9,

Replace

Replace

shorted

Check

and

Adjust

Plug

hours

F101
on

for 3 MHz

no 3 MHz

then

Yi

battery

F102
on

integrity

harness.

R142

into

live

before

power

on

power

for

and

check
regulator

square

board.

square

board.

pack

and

check
regulator

of

11.6V

outlet

use.

that

board.

wave

If

voltages

wave

with

is

full

that

board.

battery

low

pack

battery

for a minimum

CR109

at

U9-37

are

present,

charge.

CR109

connectors

is

not

on

correct,

replace

is

not

alarm.

of

3

Loss

of

circuits.

Defect

No

+5VAO

continuity

on

power

(Reg. Bd.)

in

AC

regulator

input

board.

5-7

Check

continuity

breaker,

Check

power

regulator,

integrity.

replace

If

0105-15

is

12V

or

and

or

transformer

supply

U101),

Check

check

is

OV,

more,

of

line

voltages

and

C116

0105

replace

replace

cord,

windings.

power

for

+5V;

апа

0111,

U105.

Q1ll.

circuit

(+12V

supply

if

If

switching

harness

not,

0105-15

TROUBLESHOOTING

(cont.)

Instrument

than

selected

strument

mode

DISPLAY

other

selected.

erative.

High

and

absent.

inflates

enters

than

TEST

low

pressure;

operating

mode

switch

beep

to

inop-

tones

other

in-

Circuit

Circuit

Defective

analog

board.

Defective

thermometer

Defective
board,

Open

or,

connection

defective

Defective

board.

Defective

analog

board.

Defective

board.

breaker

breaker

U35

U2

or U3

board,

U40

U40

speaker

U26

tripped.

trips

or

U31

on

on

logic/analog

in

switch

switch.

on

logic/analog

LS1

on

logic/analog

repeatedly.

on

logic/

display/

tail,

on

logic/

Reset

Check

windings

circuit

for

CR101-CR104

Вер1асе

Replace

Replace

Replace

Replace

Replace

measure

Replace

1

and

at

U26-10).

035,

U2

U40.

switch

U40.

speaker

45

U26

15

shorted

on

power

on

031.

or

+50,

if

(if

the 3 MHz

breaker.

windings

transformer,

power

U3.

panel.

if

resistance

no

signal

or

regulator

is

present

CLK

signal

shorts

or

shorted

board.

does

is

between

not

at

present

pins

High

beep

tone

absent.

Defective
analog

Defective

analog

Defective

board.

Q16

board.

U36

board.

U26

and U36

and

U40

on

logic/analog

on

on

logic/

logic/

Replace

Replace

Replace

Q16,

U36,

U26

then

then

if

no

036.

U40.

signal

at

pin

15.

Low

beep tone

absent.

Defective

analog

board.

U36

and U40

on

logic/

Replace

U36,

then

TROUBLESHOOTING

U40.

START/RESET

effect.

switch

has

no

Defective
board.

Failsafe

or

overpressure

safe

fault.

Defective
nection

Defective

board,

Defective
board.

4.5

in

U9

U26

minute

switch

switch

U32

on

on

logic/analog

time-out

or

other fail-

or

broken

tail.

on

logic/analog

logic/analog

con-

Replace

Cycle

reset

Replace

present.

Replace

Replace

U26

if

no

instrument's

instrument.

switch

panel

U32.

U9.

signal

power

if

at

pin

off

no

continuity

and

1。

on

to

Alarms

TROUBLESHOOTING

Message

No

flashing

blood

pressure

instrument

BP*READY

(oscillometric

measurement).

CHECK

FOR

AIR

runs.)

asterisk

measurement,

always

LEAKS

during

indicates

(Pump

Probable

Defective

Defective

ponents

Cuff

loosely

Cuff

strument.

Leaky

Leaker

improperly

cuff.

Internal

Cause

microphone

U46

on

logic/analog

pneumatic

not

sealing.

or

associated

applied.

connected

in

system

cuff.

com-

board.

to

leakage.

in-

Solution

Replace

Apply

board
Voltage

Properly

Properly

on

Replace

With

flate
fixture.

MANUAL

small

leaker,

transducer

assembly

Replace

coil

microphone/umbilical

100

mV,

and

trace

gain

apply

mate

instrument.

cuff.

instrument

the

pneumatic

The

indicator

pliers,

overpressure

to

for

leaker

(J5

on

transition

10

Hz

signal

should

cuff.

cuff

in

MODE

lit. One

pinch

isolate

air

leak.

if

signal

through

be

about

connector

CAL

mode,

system

SELECT

tubes

switch,

leak.

about

board),

assembly.

to

J8

24.

with

manually

with

switch

at a time,

connecting

and

Check

4V

is

present

pin 2 on

U46

to

U4l.

receptacle

in-

calibration

must

have

using

to

pressure

reservoir

across

the

5-10

If

about
logic/analog
circuitry

If

+5V

is

board

U50,

analog

Check

is

and

board.

for

cable.

+5V

to

GND

board,

on

board.

present,

not

less

associated

open

conductor

is

absent

check

but

J5-2

than

+1V

components

at

Q3

and

on

to

GND,

in

14-conductor

J7-11

associated

transition

check

on

logic/

on

Q7,

flat

TROUBLESHOOTING

(cont.)

CHECK

does

not

FOR

AIR

run.)

LEAKS

(Pump

Overpressure

Dump

valve

Pressure

Tube
sensor

Pump

Defective

No

pump

sensor

connecting

kinked.

jammed.

drive

switch

leaking

pump.

voltage.

leaking.

or

not

leaking.

to

pressure

closed.

Replace

Replace

present

switch.

manifold

between

board.

1f

12V

is

cable

Q14, and

board.

Replace

pressure

Replace

Obstruction

pump

Replace

If

when

for

associated

pressure

channel.

or

assembly.

pump.

about

attempt
conductor
0115,

power

0116,
regulator

logic/analog

absent,

an

open

straighten

caught

12V

is

is

between

and

board.

assembly

J3-1

check

conductor,

circuitry

sensor

if

and 2 on

14-conductor

and

about

transition

then

check

on

logic/analog

calibrate

tube.

in

not

made

J2

connecting

present

to

pump,

on

transition

across

rod

check

associated components

board,

then

U9

and

12V

is

flat

the

area

pump

for

board,

on

ÇI

on

Q12,

on

motor

open

and

LOW

SIGNAL

Cuff

weak

improperly

pulse,

installed

or

5-11

very

Verify proper

Replace
Check

microphone/umbilical

046,

041,

logic/analog

cuff

800

board.

placement.

assembly.

associated components

on

LOW
beeps
pumps

SIGNAL

continuously,
to

higher

(Instrument

pressures.)

and

holds,

re-

Defective
cable

Leaker

in

microphone

cuff

assembly.

malfunction.

or

audio

Replace

Perform

microphone/umbilical

leaker

bias

adjustment.

TROUBLESHOOTING

assembly.

PATIENT

FIX

ME

FIX

ME

FIX

ME

FIX

ME

MOVEMENT

0

2

3

4

or

ARTIFACT

Excessive

Poor

Defective

RAM

ROM

cuff

read/write

CRC

check)

Program

memory.

Pump

on

turned

patient

placement.

cuff.

(cyclic

error.

jump

too

off.

error.

to

nonexistent

long

motion.

redundancy

or

cannot

be

Replace

U50;
board.

Instruct

Verify

Replace

Replace

leaker.

and

Check

correct

cuff.

U1O,

associated

patient

logic/analog

Replace
analog

Replace
analog

Check

Ul,

board.

U9,

board.

for

regulator

Check

then

for

replace

U43

then

board.

then

then

shorted

board,

shorted

U9

Check

and

to

cuff

U5, U2,

U5,

Ul,

0115-0118

Q1

on

logic/analog

Q6,

Q7,

circuitry

U42,

remain

placement.

Ul,

U6,

and

U5,

and

on

logic/analog

Q8,

on

still.

and

U9

U6

on

power

Q9,

Q10,

logic/analog

U9

on

on

logic/

on

logic/

board,

board.

FIX

ME

5

Pressure

exceeded

320

mmHg.

5-12

Check
regulator

Replace

Cycle

for

U18

power

defective

board.

measurement.

Refer

to

FIX

on

logic/analog

ON/OFF

ME

4,

U104

switch

above.

(FSMOT)

board.

and

retry

on

power

FIX

ME A (All

to

logic/analog

otherwise

references

board

specified.)

are

unless

Improper

pulse

1хх.

initial

display

conditions/

contains

octal

Check

for a 90

04

U23-10

base.

Hz

Q4

for

logic

square

emitter

wave

should

0,

at

TROUBLESHOOTING

If

logic

U17-1,

be

U6-6,

logic

1,

1.

look

and

(PULSE

160

or

display

170.)

reads:

octal

Check

U108

(+0.25V).

If

U23-10

U25-1.

for

U38, R31,

Adjust

alarm

Check

replace

Check

and

replace

Check

Check

board.

Check

then

If

shorted

overpressure

before

U25-12,

FSO

U104

14-pin

Q115

that

goes

or

is

logic

it is

overpressure

R35,

replacing

as

necessary.

and

pin

12

as

necessary.

ribbon

for

U23-3

to

logic

C136

for

proper

0,

look

logic l instead

switch,

R38,

or

C45.

switch

switch.

if

high,

FS1,

on

if

high,

power

check

regulator

cable,

open,

on

power

has a momentary

0

when

for

to

Q2

check

power

5V

try

regulator

level

logic 0 at

of

0,

check

defective

to

clear

and

Q3

and

Q117,

0118,

board

logic

is

1,

turned

and

on.

Check

contains

U38-3

either

ciated

tion

U6-6

no

should

U27,

components

is

required.

for a 90

375

kHz

be

less than

the

pressure

is

Hz

square

component.

0.01V.

sensor,

defective,

wave

or

that

If

not,

or

asso-

calibra-

5-13

TROUBLESHOOTING

(cont.

FIX

reads

FIX

reads

PULSE

)

ME B (PULSE

octal

ME

C

octal

display

000.

060.)

(PULSE

060.)

display

display

reads

octal

PULSE

number

PULSE
number

Unable

Unable

display

040.

display

020.

to

close

to

start

contains

contains

dump

pump.

octal

octal

valve.

Check

components

Check

components,

Check

0117,

Q12,

dump

+202,

Defective

Check
components.

Check

012, 014,

dump

1208,

Check

components

Check

Replace

Check

Q115-Q118,

Qi!

dump

0118, 0104,

on

014,

and

valve

14-pin

valve

on

and

U9.

pump

assembly.

valve

and

power

regulator

042,

U28,

14-conductor

coil

for a resistance

cable.

U42, U28, U39,

coil

U104,

power

for a resistance

and

regulator

(see

FIX

associated

board.

U39,

and

associated

flat

cable.

and

associated

associated

board.

ME B also).

of

of

240

240

FIX

PULSE

041.

FIX

ME

display

ME

D

E

reads

octal

<20

mm

comparator

U27-5

U27-5

measures

does

0.07V.

Defective

>20

mm

U27-2

U27-2

to

measures

does

1.70V.

not

motor.

comparator

not

test

0.05

measure

test

1.50

measure

to

to

fail;

0.07V.

0.05

fail;

1.70V.

1.50

5-14

to

Check

Check

Replace

Check

Check

U27, U38,

U27,

R19,

pump

assembly.

027,

038,

U27,

R19,

R24,

R31,

R23,

R30,

R24, R31,

R23,

R30, R37,

and

R37,

and

R35.

and

R35.

and

+5V

+5V

REF.

REF.

TROUBLESHOOTING

FIX

ME F (PULSE

reads

FIX

FIX

FIX

FIX

FIX

ME

ME

ME

ME

ME

octal

G

H

1

J

K

060.)

display

90 Hz

Overpressure

failure;

to

U27-4

watchdog

2。55V。

does

2.55V.

Premature
minute

Failure

minute

Cannot

failsafe

Cannot

logic

timer

to

timer

write-lock

reset

test.

comparator

U27-4

not

time-out

test

time-out

test

logic.

U25

test

measures

measure

failure.

during

at

during

at

output

during

2.40

375

375

test

2.40

to

4.5

kHz.

4.5

kHz.

port

failsafe

to

Check

Check

Check

Check

Check

division

Check

Check

Check

NOTE:
ous
other

U23,

Q115

U27, U38, R24,

U27,

U17

U7,

U18,

U7,

This

failsafe

conditions

pressure

sensor

Q4,

and

R19,

and

of

019,

U7,

U23, U39,

test

channel

can

cause

U25,

Q116

R23,

U22

outputs

input

06,

U13,

is

logic

signal.

017, 013, 022,

interspersed
tests,

such

or a defective

this

and

on

R31,

R30,

and

and

U18.

power

U3.

U25.

with

as

excessive

alarm.

regulator

and

R37,

for

R35,

and

+5V

correct

апа

among

result

offset

pressure

board.

REF.

binary

118,

previ-—

that

in

FIX

ME

L

Initial
dump

valve

idle

state.

conditions

open)

(i.e.,

not

pump

attained

5-15

off,

in

Check PULSE
table

Check
012-014

and
in

5-1.

Q115-Q118

and

associated

down

position

display

on

U25

on

components.

or

for

incorrect

power
the

logic/analog

not

defective.

regulator

Check

bits

board

that

per

board,

S2-6

and

is

TROUBLESHOOTING

FIX

FIX

ME

ME

M

N

Pressure

in

idle

Dump

valve

Plugged

Excess

cuff

during

20

mmHg

not

detect

is

inflated

>20

mmHg

state.

or

airways

air

being

operation.

comparator

pressure

beyond

leaker

or

squeezed

for

20

not

kinked

(U38-1)

when

33

mmHg.

seconds

opening.

tubing.

from

does

system

Check
in

pressure

Check

Check

Follow

Check

Check

pressure

channel.

valve

or

integrity

operating

U38, R43,

ADC

(U41).

sensor

and

leaker,

of

pneumatics.

instructions.

R34,

and

offset

S2-6.

adjustment

5-16

Malfunctions

TROUBLESHOOTING

Symptom

All

displays

All

displays

Missing systolic,

or

pulse

information

show

are

group,

in

digits.

Missing

Same
in

systolic,

pulse

segment

missing

group.

or
diastolic,

dots.

blank.

diastolic

or

one

in

dim

wrong

or

more

one

segment

digit.

or

Probable

No

clock.

Poor

analog

boards.

Poor

Cause

connections

and

contacts

logic/analog

thermometer

Defective

thermometer

Defective

Defective

Defective

thermometer

Defective

thermometer

between

display/thermometer

in

boards.

Ul

and

or

cable
display/

U4

on

display/

between

board.

U5

on

logic/analog

digit.

RNl

or

RN2

on

display/

board.

Ul

or

U4

on

display/

board.

logic/

board.

Solution

Check

Check

Check

Replace

U4

if

Replace

Replace

Replace
RN2

if

Replace
U4

if

Y-1 for 6 MHz out.

mating

mating

pulse

Ul if

problem.

and

integrity

and

integrity

systolic/diastolic

US.

digit.

RNl

if

systolic/diastolic

pulse

pulse

Ul

problem.

if

systolic/diastolic

problem.

between

between

boards.

boards.

problem,

problem,

problem,

or

or

or

One
or

digit

dim.

completely

missing

Defective

thermometer

transistor

board.

on

display/

5-17

Replace

digits:

Systolic
Systolic

Systolic
Diastolic
Diastolic

Diastolic.

Pulse
Pulse

Pulse

transistor

LSD:
NSD:

MSD:
LSD:
NSD:

MSD:

LSD: 022.
NSD: 021.

MSD:

corresponding

Q3.
Q2.

Ql.

09.

08.

Q7.

020.

to

missing

TROUBLESHOOTING

(cont.

Wrong

in

)

or

information

Missing
ments

Won't

Cuff

placement.

in

deflate,

too

missing

display.

characters

information

loose/cuff

information

or

seg-

display.

Defective

thermometer

Poor

contacts

logic/analog

mometer

boards.

Defective

board.

Defective

or

DS16).

Bias

adjustment.

Defective

circuit.

Ul or U4 on

board.

in

cable

and

display/ther-

US

on

logic/analog

display

microphone

module

display/

between

(DS15

or

amplifier

Replace

missing

Check

Replace

Ul

or U4

mating

U5.

if

Replace display

Perform

Replace

Replace

Check

deflation

leaker

umbilical

U46

pins 1 and

systolic/diastolic

if

and

pulse

integrity

digit

module.

loop

balance

assembly

and

cable.

14.

missing.

of

contacts.

adjustment.

check

digit

ADC

(U41).

5-18

TROUBLESHOOTING

Problem

Thermometer

inoperative.

NOTE:

ment must
for

The

the

The

entire

be

thermometer

description

display/thermometer

board.

completely

instru-

operational

to

operate.

refers

to

Table

5-4.

Probable

Defective

Q17

on

No

power

Defective

Defective

Defective
R56,

CR7,

ponents,

Thermometer

Instrument

Cause

or

contaminated

logic/analog

(+5V).

crystal

U5.

U8,

Q37, Q38,

CR8,

or

System

Malfunction/Alarm

DSi

board.

(Y1.)

Q45, C27,

associated

Troubleshooting

Solution

or

Replace

Look

thermometer

plugged

Check
high

place

If a 2.00
replacing

Refer

com-

Replace

Guide

or

clean

for

+5

board.

in.

for

2,00

impedance

Yl.

MHz
Yl,

to

voltage

suspected

+0.25V

MHz

scope.

waveform

replace

DSi

or

at

U8-14

Probe

waveform

If

U5.

table

component.

017.

or

not

does

to

on

tester

at

present,

not

isolate

display/

must

U5-2

with

appear

problem.

be

a

re-

after

Thermometer

not

read

gives

immediate

active

temperature,

ERR H alarm.

but

does

or

Defective
components

board.

Defective

Defective
ciated

Q57,

or

U40

probe.

U6, U7,

components.

Q63,

and

on

logic/analog

U13

or

associated

asso-

5-19

Check
DISPLAY

Replace

mometer

Replace
tact.

and

compare

that

TEST

probe

tester

U6,

Measure

Q57

switch

ensure

voltages

to

and

or

substitute

to

test

values

Q63

have

is

actuated.

thermometer,

that

at

on

gate

Model

R84

or

U6,

voltage

R83

107,

drive

828A

are

апа 013

table.

when

ther-

in-

TROUBLESHOOTING

Turns

One

off

blank

thermometer

2

to 3 seconds

digit

Missing

digit.

Same
always

digits,

missing

is

segment

segment

lit

or

or

in 2 to 3 seconds.

digit

affected.

in

may

turn

if

on

missing

on

all

decimal

always

display;

off

center

one

or

five

point

lit,

in

Defective

Defective

circuitry.

Defective

Defective

060,

Defective

061,

Defective

Defective

U8,

Q51

and

associated

CR5.

transistors

and

064.

U5.

digit.

transistor.

Q48,

Q54,

With

at

U8-10

12,

Check

an

and

to

charged

Replace

U8-11,

mode.

12,

Replace

Hundreds:
Tens:
Units:
Tenths:

Indicator:

Replace

Replace

Replace

Du

924,

041,

cem

942, 039.
033,

ro

934,
029,
030,

mo

023,

oscilloscope

is

an

inverted

13.

see

that

Q51

if a waveform

CR5

if

no

waveform

and

13,

when

transistor

according

061.

060.

054.

048.

064.

U5.

digit.

according

to

058.

040.

047.

046.

053.

052.

059.

check

likeness

is

keeping

is

present

in

affected

that

is

present

the

to

segmented:

the

of

021

at

normal

digit:

waveform

U8-11，

dis-

8-10.

at

and

°F

Defective

Defective

RN10,

U5.

RN3, RN4,

or

5-20

RN6,

Replace

Replace

RN10,

U5.

RN3, RN4,

or

RN6.

One

digit

jumbled.

very

bright

and

Short

between

Defective

thermometer

traces.

transistors

board.

on

display/

Check

Replace

digit:

for

shorts,

transistors

according

TROUBLESHOOTING

to

affected

Thermometer

itself

off.

will

not

turn

Defective

Defective

Defective

Defective

Defective

U5.

U8.

C20,

U5.

probe

R58,

sense

circuit,

Hundreds:

Tens:
Units:
Tenths:

Indicator:

Replace

Remove

probe

storage

Withdraw

eter,
spike

ative

If

U5-22

needs

If

Check

then
should appear
spike

no

negative

goes

to

U5-22

DSI

U5.

well,

probe

replace

from

be

stays

or

061.

060,

054.

048.

064.

connector,

then

from

probe

appears,

spike

logic

replaced.

logical

017.

place

replace

well

at

U8-4,

replace

appears

1

to

1,

probe

probe

to

turn

in

well. A negative

5.

into

connector.

on

thermom-

If

this

U8.

at

U8-4, 5 but

0,

then

replace

C20

U5.

neg-

or

R58

5-21

TROUBLESHOOTING

Temperature
minutes
no

appears

indicator.

Thermometer
to

to

audible

instead

one

or

switches.

Thermometer

unusual

play

lit,
unless

unplugged.

characters

with

or

does

probe

takes 3 to
obtain,
tone,

both

does

and F or

of

not

function

turns

only

decimal

not
connector

there

rotating

on

in

turn

5

is

respond

with

dis-

point

off

is

C

Instrument

or

initial

94°F

or

above.

Defective

Defective

thermometer

Defective

Defective

is

in

temperature

switch.

CR3

or

board.

C8,

CR1,

US.

monitor

CR4

on

or

mode,

was

display/

R14.

If

entire

in

monitor

NORMAL/MONITOR

instrument

well.

If

only

is

in

ated

when room

higher

taking begins

ture

when

display

mode.

by

Retake

temperature.

the C or F is

peak

than

holding

34.4°C

temperatures

(94°F).

Replace

Replace

Using

C8

and

R14

circuits

switch.

defective

ohmmeter,

CRl,

with

U5

are

and

removed

found

priate, replace

Replace

U5.

is

Eject probe

mode

inserting

and

switch

mode.

probe

(94°F)

in

normal

CR3.

check

approximate

from

or

faulty

flashing,

to

probe

flashing,

This

temperatures

when

mode.

are

lower

or

CR4.

for

short

socket.

resistance

components

thermometer

cover,

NORMAL.

into

thermometer

mode

temperature-

Retake

than

circuits

resistance

If

is

as

set the

Reset

storage

is

activ-

are

tempera-

34.4°C

at

short

inappro-

needed.

is

at

No

audible

tone.

Defective

Defective

Defective

speaker

Q62.

U5.

or

CR2.

Check

meter.

If

the

shorted

Check

check
If

square

062.

Check

no

waveform

the

continuity

Replace

resistance

and

should

for

square

for

square

wave

for

square

at

if

30

is

be

wave
wave

is

not

wave

U5-:7,

of

speaker

to

408

very

replaced.

at

U5-17.

at

collector

present

at

U5-17.

replaco

are

low,

CR2

at

U5.

with

not

If

Q62,

If

an

ohm-

obtained.

may

be

present,
of

Q62.

replace

there

is

ERR

O

Defective

U6.

Replace

TROUBLESHOOTING

U6,

ERR

ERR

t

L

Defective

The

thermometer

a

temperature

after

The

thermometer

proper

mouth

U9.

insertion.

tissue

for

more

fails

within

senses

contact

than

to

1

within

30

minute

a

obtain

loss

the

seconds.

of

Replace

Eject

probe

turning

-

perature,

Eject probe

turning
tion

probe

perature,

not

allow

U9.

probe

probe

in

holding

patient

cover.

to

storage

cover.

to

storage

patient's

Reset

Reset

probe

to

reposition

thermometer

well.

instrument

well.
mouth
base

Retake

Properly

and

constantly.

retake

probe.

by

by

tem-

re-

re-

posi-

tem-

Do

5-23

TROUBLESHOOTING

Signal

Unregulated

DC

voltage

Regulated
voltage

Regulated

voltage

with

load

+5VA0

+5V

Logic

+14.1 Volts

(+12V)

DC

DC

Test

Point*

C102+
5101-12

2101

F101

J2-11
C116+

J2-10

C136

J2-13
0141

Table

5-5.

Power

Conditions

Input

disconnected,

25W

resistor

Same

Nominal
ON/OFF

connected

Nominal

ON/OFF

Same

Same

Regulator

AC

voltages:

conditions

AC

input.

switch

to

AC

input;

switch

conditions

conditions

Board

95-135

ON/OFF

connected

as

above.

Battery

off.

regulated

102,

battery

on.

as

above.

as

above.

Voltages

VAC.

switch

from

disconnected.

50W

DC

voltage.

connected;

Battery

off.
J107

load

and

Waveforms

252,
to

gnd.

resistor

Limits

18-35

should

14.1

14.1

5

+.25

5

4.25

14.1

VDC;

be

+.1

+.1

VDC;

VDC;

4.15

ripple

<1.5V.

VDC;

VDC;

ripple

ripple

volts.

voltage

ripple

ripple

<350

<350

<100

<300

mV.

mV.

mV.

mV.

~12

23.4

23.4

23.4

Volts

kHz

kHz

kHz

32-15

C~129

0101

U108

U107

pin

pin

pin

5

5

5

Same

Same

Same

Same

conditions

conditions

conditions

conditions

as

as

as

as

5-24

above.

above.

above.

above.

-12

23.4

form

23.4

form

23.4

form

+)

VDC;

kHz

about

kHz

about

kHz

about

+1

+1

+]

ripple

kHz

0-3.5

kHz

0-3.5

kHz

0-3,5

<500

sawtooth

VDC.

sawtooth

VDC.

sawtooth

VDC.

mV.

wave-

wave-

wave-

LOW

BATT-

J108

(to

gnd)

AC

removed

Low

voltage

vernier

J105-2

set

and

and

DC
to

gnd.

battery

power

14.0V

disconnected.

supply
connected

with

to

LOW

5V

BATT-

to

OV

signal

at

11.6

TROUBLESHOOTING

goes

4.05

from

VDC.

*

1)

2)

NOTES:

Unless

volts,

in

MANUAL,

Logic
between

otherwise
the

thermometer
and

0

is a voltage
4

and

specified,

all but

5.0V.

probe

the

between

CAUTION:

tarily

(Resets

on.

these

information

removed

0.0

and

tests

Slowly

are

from

display

+0.2V;

Observe

short

latch

with

the

Logic

'

polarity;

U103

U103.)

lower

DC

the

instrument,

blank.

1

momen-

pin 8 to

gnd.

ON/OFF

supply

AC

is a voltage

line

MODE

voltage.

at

switch

120

set

|

5-25

TROUBLESHOOTING

Point

U9-37

U9-36

U9-3

U9-7

U9-9

U9-8

09-4

U9-6

U29-20

(CLK)

(RST

(RST

(RST7

(RST5.5)

(RST6.5)

(SOD)

(TRAP)

(CIM

Table

IN)

OUT)

.5)

Option

5-6.

Unless

Logic/Analog

specified,

only)

all

Board

points

Voltage

3

logic

logic

1.46

MHz

Voltage

referred

Spec.

square

1

0

kHz

square

Specifications

to

wave,

wave,

logic 0 (logic 1 START/RESET

logic 0 (with
logic 0 to

logic 0 (except

logic

+5

40.2

0

VDC

CIM

logic

1)

when

ground:

logic

0

to

logic 0 to

actuated)

Option: 1 Hz

pump

on)

logic

logic

pulse,

1

1

U29-2

U29-18

U33-4

U26-1

U26-15

U26-4

U26-6

CLOCK)

U40-10

U40-12

U40-13

U40-23

(CIM

Option

(CIM

Option

(PWR

GOOD)

(LOW

TONE)

(HIGH

(POWER

(A/O

(TURN

TONE)

SUPPLY

CLOCK,

OFF)

(TEMP)

(DTEST)

(DEADBAT-)

only)

only}

CLOCK)

FAILSAFE

32.768

logic

logic

logic

732

1.46

23.4

375 kHz

logic

Hz

kHz

kHz

kHz

1

1

1

square

square

square

square

0

square

logic 1 (probe

logic

logic

0

1

(battery charged)

wave,

wave,

wave,

wave,

wave,

removed

logic 0 to

logic 0 to

logic 0 to

logic 0 to

logic

from

0

to

well)

logic

logic

logic

logic

1

1

1

1

5-26

ンー

ペー

TROUBLESHOOTING

U40-24

U40-25

U36-10

U17-1

U17-12

U17-4

U17-2

U25-4

U25-8

U25-12

925-10

(LOWBATT-)

(AC-)

(AUDIO)

(4.5

MIN

TIMER

CLOCK)

logic 1 (battery charged)

logic 0 (when

logic

91.6

45.8

1.43

logic

logic

second

logic

0

Hz

Hz

Hz

0

1

0

(no

square

square

square

(not

stage)

logic 1 (FS+5

dumper,

leaker,

plugged

audio

present)

wave,

wave,

wave, logic

allowed

activated

and

into

logic 0 to

logic

to

pump

circuits)

logic

0

AC)

0

0

clock

to

enable

control

logic

to

logic

to

logic

a 1 to

1

1

1

U23-2

U23-1

023-11

U23-4

U22-11

U22-2

U3-3

U13-9

U27-1

(FS2-)

and

U22-3

(To

ANALOG

(4.5

MIN

GROUND)

TIMER)

logic

logic

logic

logic

logic

logic

logic

logic

0.0

1

1

1

0

1

0

(both

0

1

+0,024

VDC

HI at

(system

the end

deflated)

of

4.5

MIN)

5-27

TROUBLESHOOTING

U27-5

U27-2

U27-4

U38-1

U38-7

U38-3

U38-2

U38-5

Pin

From

Unless

or

Lead

U42-14

specified,

Position

to

U42-7

all

points

referred

Voltage

0.058

1.60

2.39

to

Spec.

+0.004

+0.010

30.180

analog

logic 0 (system

logic

0.0

0.118

1.99

Voltage

logic

1

+0.024

10.010

40.15

Spec.

0

(system

VDC

VDC

VDC

VDC

VDC

deflated

«335

(system

VDC

(reference)

(reference)

ground

mmHg)

(U41-16):

<20

mmHg)

deflated)

From

U42-15

From

U42-16

014

collector

U41-28

U41-27

U41-26

From

U41-10

U46-14

(APS)

(RPS)

(MICS)

|

to

to

to

U42-7

U42-7

U42-7

logic

logic

12.7

0.0

2.5

2.5

375

0.0

0

0

+1.7

+0.02

+0.25

30.25

kHz

+0.04

VDC

VDC

VDC

VDC

square

VDC

(dumper

(idle

(idle

(idle

wave,

open)

state)

state)

state)

logic

0

to

logic

1

5-28

Ma

TROUBLESHOOTING

From

U46-9

U46-6

VR2

"OUT"

044-2

U45-1

U45-5

U50-1

U50-5

From

U50-10

U50-12

(+5VDC

(APS)

(-LIM)

to

(+LIM)

Unless

VR2

"OUT"

REF)

specified,

to

VR2

"OUT"

all

points

Voltage

-0.1

-0.1

referred

0.050

to

+0.025

4.75

to

1.22

to

0.0

30.024

1.22

to

0.0

+0,5

+0.025

0.050

to

1.5 4 0.5

Spec.

0.125

5.15

1.25

VDC

1.25

VDC

0.125

VDC

VDC

VDC

VDC

VDC

VDC

to

ground:

VDC

(system

VDC

deflated)

U50-14

Point

U1-20

U10-2

U10-3

U10-4

U10-39

(CIM

(CIM

(CIM

(CIM

Table

Option

Option

Option

Option

5-7.

Unless

Display/Thermometer

specified,

only)

only)

only)

only)

ali

5.5

to

Board

points

Voltage

+5

£0.25

3

MHz

3

MHz

logic

logic

7.0

Voltage

referred

Spec.

VDC

square

square

1

0

VDC

wave,

wave,

Specifications

to

ground:

logic 0 to

logic 0 to

logic

logic

1

1

5-29

TROUBLESHOOTING

Thermometer
ground:

Point

08-14

08-10

Q37-C

U5-11

U7-8

U5-4

Q57-D

(VP)

(VA)

(RST)

completely

inoperative;

Expected

4.75

Waveform,

to

logic

0

to

4.75

4.75

4.75

0

VDC

to

0.1

to

to

to

Voltage

5.25

1

VDC

5.25

5.25

5.25

unless

VDC

logic

VDC

VDC

VDC

0

specified,

Probable

Probe

08

037

045

038

C8,

U5,

Q57

on

board,

analog

ail

points

Defective

Connector

or

R14

referred

Item

display/thermometer

DS1

or

017

on

board

to

logic/

Thermometer
to

ground.

Point

U5-23

SENSOR

(PROBE

IN)

U8-9

07-8

U7-7

(TEMP

U13

U6-10

U8-11,

12,

does

SIGNAL)

and

13

not

read

Expected

1,2

4,75

4,75

1

VDC

OUT

0.1

0

to 5 VDC

temperature;

Voltage

to

1.4

VBC

to

5.25

to

5,25

or

less

1.23

VDC > REF

VDC

or

less

pulses

VDC

VDC

unless

specified,

Probable

CR7,

U8,

CR8,

C27,

038

U7

U13

R67

U8

or

R61

all

points

Defective

or

C15

or

R56

referred

Item

5-30