Mettler Sys Stim 220 Service manual

SYS*STIM ®

INTERFERENTIAL

220

NEUROMUSCULAR

STIMULATOR

Mettler
1333

South

Anaheim,

(714)

Toll

533-2221
Free

Electronics

Claudina

CA

92805

[phone]

Corp.
Street

U.S.A.

MAINTENANCE

MANUAL

copyright©
copyright©

IR6-64

1989
1992

by
by

(November,

Mettler
Mettler

1993)

Electronics
Electronics

1

Corp.
Corp.

--Anaheim,
Anaheim,

CA
CA

TABLE OF CONTENTS

SECTION

Introduction
Precautions
Labels
Abbreviations
Limited

Warrant
Equipment
Controls

and
Operating
Routine

Fuse

Maintenance

Replacement
Cleaning
Functional

y

Description

Displays

Instructions

Troubleshooting

PAGE

3

4

5

5

6

7

9

14
17
17
17
18

Theory
Sys*Stim

of

Operation

220
Troubleshooting
Specifications
sys*Stim
Drawings

220

and

Test

Procedure

Guide

Parts

List

Schematics

19
23
32

33

34

38

2

Introduction

This

manual

technicians

interferential

guidance

to

malfunctions.
This

information
Electronics
considered
and

address

necessary.

Mettler
Manual
1333

Anaheim,

The

ME220

amplitude

is

modulated

by a membrane
In

the

premodulated

premodulated

ments
amplitude
tively

and

made
modulated

increase

currents.

is

intended

in

the
neuromuscular

aid

the

is

Corp.

may

to:

Electronics

Update

S.

Claudina

an

interferential

control

for

output

to

reciprocate

the

to

servicing

technician

current

make

To

List

CA

92805

and

premodulated

panel.

mode,

to

mode,
area

aid

biomedical
and
stimulator.

in

as

of

changes

receive

Corp.

street

neuromuscular

interferential

one

or

between

the

treatment

being

treated

engineers

repair

of

It

troubleshooting

publication.

if

and

when

manual

updates,

operating

currents

two

channels
the

two

field

by

the

the

Sys*stim

contains

Mettler

they

stimulator

modes

for
channels.
rotates
interferential

and

and

are

send

controlled

can

two

220
sufficient
repairing

your

providing

be

pad

treat-

In

the

to

effec-

name

Bright
Both

channel
display.
either

Operating
If

the
section
that

If

section

you

Service

digital

outputs

A

dual

channel

instructions

operational

are

desired,

is

need

further

Department

displays

are

control

separately

characteristics

go

pictured

assistance,

toll

show

displayed
knob

or

in

this

to

that

and

free

treatment

simultaneously

is

used

both

together.

manual

of

portion

fully

described.

calI

at

[phone]

time

to

adjust

are
a

particular
of

Mettler

and

keyed

the

Electronics

or

output

on

the

to

intensity.

the

intensity

illustrations.

membrane

instructions

[phone].

LED

of

panel
where

Corp.

3

PRECAUTIONS

1.

2.

3.

4.

5.

6.

7.

8.

DISCONNECT

THE

LINE SUPPLY

UNIT.

Servicing
recommended

The

ME220

to

preserve

Adhere
servicing

To

insure
plicable
checked

USE

OF

PROCEDURES

should

calibrated

should

protection

to

standard

medical

compliance

safety

and

safety

CONTROLS

OTHER

standards,

OR

ME220 INSTRUCTION

TO

ELECTRICAL

Do

not

shortwave

Replace
specified
fire

and

operate

line

other

ENERGY.

or

microwave

fuses

in

the

the

component

be

performed

test

be

plugged

against

safety

electronic

with

tested

ADJUSTMENTS,

THAN

THOSE

MANUAL,

ME220

in

diathermies.

with

list

the

of

specifications
damage.

CORD

PRIOR

by

qualified

and

measurement

into

a

electric

practices

equipment.

performance

the

ME220

at

least

OR

SPECIFIED

MAY

RESULT

close

same

proximity

type

TO

DISASSEMBLY

technicians

equipment.

grounded

wall

shock

for

troubleshooting

specifications

should

once

each

be

year.

PERFORMANCE

HEREIN,

IN

HAZARDOUS

with

and

rating

to

avoid

OF

outlet

hazards.

and

performance

OF

AND

IN

THE

EXPOSURE

operating

as
risk

THE

using

only

and

ap-

of

9.

Primary
specified

UL-544

circuit

components

standard

components

to

insure

for

medical

must

and

be

replaced

continued

dental

with

compliance

equipment.

factory-

with

the

4

LABELS

1.

2.

3.

AC

BPS
DB

DC

DVM

Hz

kohm

LG1
LG2

mA

msec

mW

usec
Vdc
Vac

W

The

Food
devices
the

Sys*Stim
product.

Care

should
alized
such

actions
labels.

Include
assistance.

alternating

beats

display
direct
digital
hertz

-

Kilo-ohm

logic

logic

milliampere

-

millisecond
milliwatt

-

microsecond

voltage
voltage
watts

and

be

uniquely

be

labels,

applicable

per

current

voltmeter

(cycles

one

two

Direct

Alternating

Drug

220

with

taken
especially

as

removing

current

second

board

(1000

board
board

(1/1000
(1/1000

(1/1000

(1/1,000,000

Administration

identifiable.

seriaI

to

preserve

during

access

seriaI

ABBREVIATIONS

per

numbers

second)

ohms)

ampere)
second)

watt)

Current

Current

requires

number

the
servicing

covers

when

second)

This

labels

integrity

that

is

accomplished
unique

and

could

damage

requesting

medical

to

of

the

repair

service

on

each

seri-

when

the

5

LIMITED

WARRANT

Y

The
workmanship
During
will,
without

For
returned
Mettler

sys*Stim

the

applicable

at

its

charge

service
by

Electronics

Electronics
The

buyer
proof
without

of

must

the

proof
out-of-warranty
service

rates.

Alteration,

warranty.

Except

Electronics

includinq

without
merchantability
to

the

Product.

law,

they

are

Mettler
indirect,
from

any

special,

defect

220

for

a

period

discretion,

for

under

the

buyer

Corp.

under

also

date

of

of

the

product

misuse,

as

Corp.

makes

limitation

or

If

limited

Electronics

in

is

warranted
of

two

warrant

either

these

Corp.

types

this

within

warrant

Shippinq

this

include

a
purchase.
date

of

at

or

Mettler

neqlect
specifically

no

warranties,

fitness

any

in

for

implied

duration

corp.
consequential
or

use

of

against

years

y

period

repair

of

defects.

y ,

the

applicable

warrant

copy

If

of
the

purchase,

Electronics

set

any

implied

a

particular

warranties

to

shall

or

the

Product.

defects
from
Mettler

the

or

date

replace

Product

charqes

y

must
the

be

sales
Product
it

will

of

the

Product

forth

express

warrant

apply

one

year.

not

be

incidental

in

of

purchase.

Electronics

the

must

warrant

to

paid

and

y

from

by

receipt

is

returned

be

serviced

Corp.'s

voids

above,

p~pose,

or

y

Mettler

implied,

of

as

liable

for

damaqes

materials

Product

be

period

Mettler

the

or

prevailinq

with

a

matter

any
resultinq

Corp.

to

buyer.

other
as

this

respect

and

an

of

Any
warrant
claim
courts

Sorne
warrant
consequential"
not

apply

legal

from

state

legal

y

must

arises

located

y

lasts,

rights,

and

states

to

the

to

action

be

commenced
must

in

Orange

do

not

or

the

damages,

buyer.

and

the

state.

brought

within

be

brought
County,

allow
exclusion
so

the

This

buyer

by

limitations

above
warrant

may

also

the

buyer

one

year
only
California.

or

in

limitation
limitations

y

gives

have

relating
from

the

on

other

state

how

of

the

to

the

date

or

long

incidental

or

exclusions

buyer

rights

this

any

federal

an

implied

specifie

which

or

may

vary

6

EQUIPKENT

DESCRIPTION

1.

2.

3.

4.

5.

The

sys*stim
channel,
a

choice

operational

The
two
circuitry
front
base

There
Display,
consisting
and
supply
later

The
switches

Displays
indicate

tain

injection

halves,

half.

that

are

logic

circuits.

in

membrane

(LED's),

error

220

is

interferential

of

four

modes.

a

and
is
four

Logic

of

boards

the

and

consisting
green
control

conditions

frequency

molded

front
indicator

The

back

removed

printed
1

and

two

conta
Theory
control

connector

LED

operation,

a

ABS

half

by

Logic

line

Each

of

panel

of

mode

portable,

neuromuscular

modulation

plastic
and

a

subassemblies

half

in

are

provides

means

circuit

2.

fuses
of

Operation

into
7-segment

indicators,

and

most

these

incorporates

one

end

explained

of

of

solid

enclosure

back

four

boards

The

a
the

subassemblies

section.

replaceable

state,
stimulator
modes

half.

are

a

protective
phillips

in

RFI

line

operating

graphies,

.

light

of

emitting

and

an

treatment

later.

for

is
Electronics

assembled

the
board
filter.

component

audible

time

digital,

that

each

divided

coyer

head

ME220:

is

a

The

and

is

described

circuitry,

diodes

and

dual
offers

of

into

into

screws.

RFI,

small

display

power

.

signal

cer-

two

the

and

pcb

7

time

05.00'-'1

min

IIlngle

lIec

intensity

1[,12

J

(-;

(~~~~1~~

~

(-

0

o 7

,

10

,

__

Î0

\

(

o f

- ;

(-----'

milliamplI

~~15

bpll

bplI

0 -250

bpll

lIec.

~_-'

am

(1)

,~)

~

.-

_)

..) interfer.loHI

_.

---1

'.

.>

-,

:

J

'.

fast

!

freq,
sweep

'i

amp.

recip.lb)

!bi

single

Ifreq.

select

13

mod.lIl

poln

~:

;2

Ion)

beat

frequency

lIelector

."[J.n

power

CONTROL

AND

DISPLAY PANEL

8

1

channel

1+2

0

"\7

\1

min

pUllh

intensity

2

•

\,-:7

'V

mex

CONTROLS

AND

DISPLAYS

[

min

Time

Up

05.

Oown

00

••

c

Oisplay

arrows

J

1.

2.

3.

The

time

and

seconds.

the

display

Up

and

down

immediately
display
select
time.
one
switch
ly

•.
will
time.

The
operator

when

fully

the
Time

minute

is

Holding

rapidly

"Go"

intensity

counterclockwise.

display

is

arrows
below

allow

desired

will

steps

depressed

switch
to

begin

shows

The

format

00.00.

located

the

the

operator

treatment

increment

when

the

switch

increment

allows

treatment

controls

minutes

for

time

to

in

the

momentari-

down

the

the

are

GO

HOLO

(

RESET

Switch

Switch

switch

)

4.

5.

The

"Hold"
treatment
desired
or

time.

zero

once

The
time
clears

parameters.
treatment

if

before
again.

"Reset"

display

aIl

pressed

switch

without

treatment

Intensity

"Go"

switch

to

previously

It

and

reset

during

suspends
altering

parameters

must

is

pressed

returns

zero

will

and
also

parameters

"Go".

set

be

stop

the

to

the

9

beet:frequency

.elect:or

6.

The

"Single
tor"
control
beat

"single
is
cies
selected.

thumbwheel
frequency

activated.

from

the
freq.

1-299

Frequency

switches

input

of

when

select"

Beat

bps

Selec-

a

single

the

switch

frequen-

may

be

single

Frequency

power

Main

Power

switch

intensity

1ŒD@]e

Intensity

Display

Selector

7.

8.

The

Main
rocker
pressed
power

The

intensity

the

output

and

2

liamps.

Power

switch

to

·to

the

simultaneously

the

of

Switch

which,

right,

unit.

display

both

is

if

de-

applies

shows

Channels

in

mil-

a

1

When
tor

the

lights

following

to

the

"0-15"

mode

left

switch

selector

of

each

switches

switch

9.

10

are

will

The

"0-15"

beat
bps.
from
15
selected,
control
sweep,
lationtrecip.

modes

frequency

A

15

bps

takes

amplitude

may

activated,

be

lit.

switch

normal
to

0

the

the

fast

also

sweep
sweep

bps

and

14

sec.

switches

frequency

modu-

and

be

indica-

activates

of

0-15
cycle
back

When

which

bipolar
activated.

a

to

10.

The

"80-150"

a

beat

150

bps.
from
150

150

bps

selected,

control
amplitude
and

bipolar

activated.

switch

frequency

A

normal

to

80

bps

takes

the

the

14
switches

fast

modulation/recip.

modes

activates

sweep

sweep
and

sec.
freq.

may

of

back
When
which

sweep,

also

80-

cycle

to

be

"80-150"

"0-250"

( 0 7

l~

7

sec

switch

switch

_ee.

~

switch

J

::::.

.weep

11.

12.

The
beat
bps.

from
250

"0-250"

frequency

A

250

bps
selected,
control
tude

modulation/recip.
bipolar
activated.

The

switch

fast

freq.
frequency
seven

seconds,
frequency
It

cannot
"single
being

used.

switch

normal

to

0

bps

takes
the

modes

the

"7

14
switches

fast

may

sec",

sweep,

sweep
sweep

be

selected

Frequency

sweep
sweep

and

sec.
sweep,

also

activates

twice

as

the

of

Select"

activates

of

0-250

cycle

back

When

which

ampli­and
be

labeled

as
normal

14

seconds.
when

a

to

a

fast,

is

'------_----/'

_11"[

AmpUlud.

'~'"

~

r

..

'.1'....

••

Amp.

...

_11"(

fl.çlp.oulkN\

mod.

8mp.mod.m
recip.lbJ

lIIloclulllion (Il

: ,

•.

1

,l,

(I)/recip.

13.

(b)

When
either
to
and

channel
mode,
rocation
occurs

In
displays
output
channel

switch

11

selected

40%

back

or

each

modulate
of

the

alternately

in

the

a

four

of

each

in

the

case

will

intensity

as

they

this

switch

the

set

intensity

interferential

second

channel

bipolar

the

intensity

indicate

of

change.

will

amplitude

in

each

recip-

mode.

the

each

[ -

o

~

~

Jbi

polar

interfer.[offJ

[onJ

14.

This

tor
only
stimulation
premodulated
frequency
pads

ment.

frequency
with
Hz,

is

available
When

lected

the
Channel

frequency
channel
that
depending
cy

Four

interferential

switch

to

treat

two

electrodes.

are

required

Example:

another

the

output

100

bps.

this

the

interferential

two
one

varies

settings

pads

allows

a

patient

currents

to

so

that

of

4000
frequency

beat

The

on

both

switch

Sys*stim

always

of

4000
has
from

on

the

described

~ust

be
therapy.

the

are

create

only
for

The

carrier

Hz

is

frequency

output

channels.

is

not

220
mode.
has

Hz,

while

a

frequency

4001-4299

beat

used

opera­using

The

a

beat

two

treat-

mixed

of

4100
is
se-

is

a

frequen­above.

for

in

Hz,

Bipolar

o f

[

____

Single

(on)/Interfer.

single
freq.

select

J

freq.

select

15.

switch

16.

(off)

Channel
adjusts
Channel
be
clockwise
sity

switch

The

single
activates
switches
of

a
frequency.
used

modulation/recip.

stimulation
this
13

and

The

Intensity
allow
the

intensity
either
pressing
to

rotate
neously
knob

initiate

adjusts

rotated

to

which

single

for

amplitude

option

14)

the

simultaneously

down
or
1

the

2.

zero

treatment

freq.

the

thumbwheel

allow
treatment
Only

may

is

selected.

control

operator

of
on

both

and

to

knobs

singly.

the

the

intensity

Both

fully

reset
in

select

the

and

be

used

to

both
the

The

intensity

upper

channels

counter-

the

order

by

switch

selection

beat

switches

bipolar

when

(See

knobs
adjust
channels
by

top

knob

simulta-

lower

knob

for

must

inten­to
pressing

for

12

1

0

chenn.'

1+&

pueh

V

min

0

intensity

2

•

\l

mex

"Go".
the
the
unit
reading
the
changes
patient/pad/cord
ance
in
position.

It
intensity
stimulation

terminaIs.

in

stimulation

as

changes

the

intensity

should

mA

the

be

controls

voltage

The

will

current

loop

without

control

noted

control

meter

change

resist-

a

change

at

that

the

and

Intensity

control

13

OPERATING INSTRUCTIONS

power

Main

min

1

o

Power

channel

1+2

pu.h

Switch

intensity

Intensity

Controls

time

[

05.00J

min

Bec

2

•

max

1.

2.

3.

Turn

Adjust
fully
is

minimum

Select
time
located

play".

or

down

the

time

minute.

button
the
minute
time

time
play.
sary
operate
an

time.

time

59

minutes.

indefinite
initiate
"Go"

on

the

main

both

counter-clockwise

the

using

below
Briefly
arrow

will
intervals.

which

by

observing

NOTE:

to

the

without

intensity

intensity.

desired
the

up

or

Holding

rapidly

up

or

can

Verify

input

Sys*Stim

operation

entering

upjdown

the

pressing

will

down

down
be

It

time
time

power

treatment

"Time

increment

one

down

increment
in

The

entered

the

time

is

not

in

220.

is

by

switch.

controls

which

arrows

Dis-

an

the

one

maximum

is

input

dis-

neces-

order

If
desired,
pressing
a

preset

up

to

Up

l0

Down

~

~

BEATFREQ.

100

BPS

Arrows

J

~i

polar

Interfer.(offJ

ConJ

4.

Select
choice
choose
channel

(Channel

1 =
trode
bipolar/pre-modulated
is

be

14

the
here
the

treatment

2 =

4000-4299

placement

pressed,

premixed

treatment

will

interferential,

the

in

automatically

type.

4000

Hz,

#9).

currents

the

Hz,

see

unit

type.

Channel
elec-

If

the

button

will

and

No

2

each
pre-modulated
of

channel

0-299

bps.

will

beat

supply

frequency

a

Beat
100

( 0

080-150

(0

( J

o

BPS

°bP~!5

bp.

f

7.ec.

Freq.

J

Î

./

single
freq.
aelect

f.at
freq.

aweep

5.

6.

Select
beat
pressing

lowing:

cycle

frequency

time

o -

80 -150

o -

elect
frequency
Frequency

If

sweep

to

cycle

seconds.
more
time
The

from
to

a

you

range,

complete

is

aggressive
of

sweep

15

15

bps

one

of

the

any

one

(NOTE:

=

14

15

bps

bps

250

bps

or

single

by

pressing

Select".

select

approximately

Press
7
bps

.

a

the

an

entire

seconds.
cycle

to

0

three

sweep

sec.)

treatment

beat

normal

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sweep
for

bps

modes

of

the

normal

frequency

sec"

Example:
"0-15"

and

preset

fol-

sweep

"Single

time

sweep

14
for

cycle

back

by

a

is

•

lnBle

beet:frequencv

•

elect:or

7.

8.

If

you

frequency
desired
frequency
Beat
thumbwheel
frequency

Press

the
channel
the
sensation
stimulation
the

Activation

15

select

select",

treatment

by

Frequency

switches.

range

this

amplitude

interferential

patient

switch

alternately

of

is

when

of

"single

dial

beat

using

to

movement

experienced

this

the

Selector"

is

0-299

to

40%

mode.

in

switch

in

"Single

The

bps

modulate

in

each

when

this

of

in

the

mode.

the

beat

.

A

by

in

r-

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~mm

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----+

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l'f---i-

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Reciprocatlon

TIME

amp.

recip.

Modulation

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4-CH2

(1)

UJ

bipolar
the
Channels
channel

mode

bipolar

one

will

approximately

during

In

displays

indicate

of

each

each

each

case

will
the

channel

will

reciprocate

stimulus

and

two.

be

on

four

cycle.

the

intensity

dynamically

output

.

between

Each
for
seconds

intensity

int:ensit:y

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9.

10.

11.

Install

2 dummy

ohm)

Press
controls

GO

(both

must

counterclockwise).

Adjust
the
dual
By
upper
controls

the

desired

intensity

pressing

control

output

level

down

will
simultaneously.
adjust
lower
two

the
intensity

will

Channel

control

is

adjusted

upper

be

control
for

displayed

milliamps.

loads.

intensity

be

fully

intensity

using

control

gently
knob
rotate

In

one,

knob.

by

knob.

both

in

(lK

the

knob.

on

both

order

rotate

Channel

rotating
channels

to

the

to

the

The

12.

13.

If

any

program
desired,
ad

just

ment

suspend

intensity

intensity
counter-clockwise
pressing
treatment.

When

the

elapsed,

sound.

displays
the

electrical

stop.

16

except

s,

press

treatment.

by

rotating

controls

"GO"

to

treatment
the

buzzer

The

time

will

display

changes

intensity

"Hold"

fully

before

reinitiate

time

and

output

are

Reset

both

has

will

intensity

"0"

will

to
the

and