HP 548A Service and user manual

A

ND

SERVICE

M

ANUA

AL

LOGIC

HEWLETT

CLIP

l

|hﬁ_,

PACKARD

CERTIFICATION

Hewlett-Packard shipment ments Bureau’s zation

This of

one

of

this

or

replace

to

Hewlett-Packard, Repairs TIES TIES IS

NOT

If

this

shall

Service

For vided

from

are

traceable

calibration

members.

Hewlett-Packard

year

from

manual,

products

necessitated

ARE

EXPRESSED

OF

MERCHANTABILITY

LIABLE

product

not

be

applicable,

contracts

any

assistance,

at

the

back

Company

the

FOR

is

sold

or

of

factory.

warranty

which

contact this

certifies

Hewlett-Packard

to

the

United

facility,

and

WARRANTY

product

date

of

shipment

shall be

prove

and

provided

by

misuse OR

IMPLIED,

CONSEQUENTIAL

as

part

and

this

customer

assistance

your

manual.

that

this

instrument

Company

States

to

the

calibration

National

AND

is

warranted

for

to

be

the

of

the

AND

FITNESS

of a Hewlett-Packard

product

nearest

against defects

except

defective preventive product

INCLUDING,

that

the

specified

are not

FOR A PARTICULAR

DAMAGES.

shall

be

agreements

Hewlett-Packard

met further

Bureau

facilities

ASSISTANCE

in

the

period.

during

covered

the

maintenance

covered

BUT

integrated

are

available

its

published

certifies

of

Standards,

of

other

in

materials

case

of

certain

Hewlett-Packard

warranty

procedures by

NOT

LIMITED

instrument

only

by

the

Sales

and

specifications

that

to

International

and components

period

in

this

warranty.

TO,

PURPOSE.

system

for

Hewlett-Packard

Service

its

calibration

the

extent

workmanship

will,

provided

this

manual

NO

ThHE

IMPLIED

HEWLETT-PACKARD

system,

warranty.

Office.

at

allowed

Standards

listed

at

its

option,

they

are

OTHER

the

above

products.

Addresses

the

time

of

measure-

by

the

Organi-

for a period

in

Section

repair

returned

followed. WARRAN- WARRAN-

warranty

are

pro-

|

010000-A~238

OPERATING

AND

SERVICE

MANUAL

Manual Microfiche

Part

No.

Part

548A

00548-90009

No.

00548-90010

LOGIC

548A

CLIP

Printed:

CLIP

INSTRUCTIONS

JUN

1977

Printed

in

U.S.A.

Page

0

AUXILIARY

POWER

CONNECTOR

e

P

T

—

The

30

volts

548A

Logic

which

must application pulse

greater

cause

permanent

ered

by

warranty.

No

damge

clipped

circuit if

the

directly

with

clip

is

CAUTION

maximum

Clip

is

an

not

be

of a dc

than

damage

will

occur

to

dc

voltages

removed

Model

input

to

the

absolute

exceeded.

voltage

30

if

an

value

volts

not

the

548A

integrated

up

to

30

Any

or

a

may

cov-

is

volts

within 1 minute.

548A

Figure

1.

HP

Model

|

548A

Logic

Clip

Test

leads

should

make

connections

there

is

any

possibility tering a voltage dc.

Test

lead

inductance

noise

spikes

or 30

volts

and

permanently

the

logic

clip.

not

to

greater

pulses

be

the

of

encoun-

than

may

in

excess

used

548A

18

volts

cause

damage

to

if

of

Model

548A

APPLICATION The

548A

Logic

families,

of a dual adders, Sixteen connections

including

in-line

and

shift

high-efficiency

NOTE:

Accidental

are

SPECIFICATIONS

Input

Protection:

Input

Current: Supply Supply

Voltage: 4 to Current:

Auxiliary

Supply

Input

Threshold

on

above

Logic

Family Operating Indications:

=15

Positive

must

be

2.3V. Compatibility:

Temperature

Clip

light-emitting-diodes

TTL,

HTL, DTL,

IC

which

operates

registers.

necessary;

All

LED’s

the

16

provide

Logic

connection

30V

absolute

uA

18V

50

mA

Supply

at

least

Voltage

maximum

across

maximum

Voltage:

1.5V

Range:

any

more

DTL,

Range: 0 to

LED

Indication

CMQOS,

and

from a supply

input

gates

HIGH

Clip

powers

of

up

to

+30

for

one minute.

over

the

range

two

pins.

with

15

LED’s

+4.5

to

+20V

positive

(LED’s)

are

will

NMOS.

It

of 4 to

electronically

(LED

on)

and

itself

from

volts

on

548A

of

+0.5V

on.

applied

than

any

to

18

V55|, x (0.4 + 0.06).

TTL,

HTL,

CMOS

55°C.

and

NMOS

indicate

displays,

volts.

logic

simultaneously,

The

buffered

LOW

(LED

the

V.

clip

pins

to

Vsupply - 0-5V.

connector

on

IC

under

Example:

in

dual

levels

clip

can

to

minimize

off)

logic

and

ground

for a minute

on

top

of

clip

test

to

at

+5Vgypply

in-line

on

most

logic

test

flip-flops,

loading level pins

will

(ground

prevent

LED’s

packages

integrated

levels

for

gates,

on

any

indication.

of

the

IC

under

not

damage

supplied

drawing

will

up

to

be

16

power

off

pins.

circuit

all

8,

14

(IC)

or

counters,

IC

being

No

power

test.

548A

circuits.

by

IC

under

from

below

Page

logic

16

pins

buffers,

tested.

supply

test).

the

IC.

1.7V

and

1

On Off

Dim

Pin Pin Pin

voltage voltage voltage

above

threshold

below

threshold

pulsating

or

no

connection

(open)

Page

2

Model

548A

OPERATION

Squeeze contact the

corresponding

OPERATION

If

the

IC’s voltage for

details.

nominally

(See

the

Logic

must

be

WITH

being

applied

An

auxiliary

0.4 x (Vgypply - 0.8).

TESTING

If

faulty

operation

to

check

for

correct

LED’s

should should

Clip

pin.

The

threshold specifications. and

connect a monitored

zero

and

light.

go

off. A separate

Test

leads

voltage

Test

note

the

MAINTENANCE

The

Logic

Clip

ment

parts,

address

and

identify

parts

Photo)

Clip

good.

IC

pin.

AUXILIARY

tested

to

the

548A

of

the

operation.

Ground

can

which

the

threshold

internal

inquiry

by

description.

to

open

the

The

LED’s

There

are

use

low

voltage

top

terminal

power

cable

Logic

Clip

With

each

adjustable

be

used

for

will

by

variable

voltage

electronics

to

the

contact

will

no

POWER

is

suspected,

the

voltage

testing

switch

applying a steady

threshold

(e.g.,

assembly

nearest

jaws

indicate

operating

the

SUPPLY

(below

supplied

separately

4V)

(see

photo)

with

each

supply

power

provided

one

LED

test

voltage

1.7

to

2.3

is a single

Hewlett-Packard

and

place

logic

level

controls

or

if

power

allows

the

clip.

network connected (except

supply

the

on

is

variable,

monitored

volts)

molded

the

applied

to

the

(LED

or

service

may

complete

NOTE:

across

V.

can

be

each

for

each

Sales

clip

on

on = logic

adjustments

not

Input

should

any LED), used

voltage

and

it

supply

LED

LED.

part

and

Service

the

pins

be

drawn

use

of

threshold

be

tested. A 4

two

pins,

and

each

to

check

does

depends

voltage

to

be

is

not

Office.

of

the

HIGH

and

on

the

from

circuit

the

clip.

Refer

with

the

V¢

LED,

the

threshold

not

exceed

on

the

to a pair

tested.

Increase

repairable.

Give

IC

to

LED

clip.

to

auxiliary

to

18

volt

LED

when

18V

IC

supply

of

548A

To

Logic

be

tested.

off = logic

under

test,

the

“Specifications”

power

supply

and

the

remaining

that

is

voltage

dc

obtain

maximum.

voltage.

pins

the

test

Clip

of

(e.g.,

voltage

other

model

Pin-to-pin

LOW)

an

external

supply

can

be

used

grounded, each

Logic

See

+5

volts),

from

replace-

number

on

is

14

the

To

obtain

Service

IN

THE

IN

CANADA:

HEWLETT-PACKARD

servicing

Office

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CALIFORNIA

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GEORGIA

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ILLINOIS

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JERSEY W. Paramus

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or

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AND

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and

MARUAL

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MANUAL

DESCRIPTION

518A

and

None

1976

JUN

00548-90009

005/8-90010

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ACTION

paragraph

the

Logle

Clip

Service

TG

under

applied

Monunl

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voltage

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HEWLETT

P8

PACKARD

Insert

the

this

inside

MANUAL

Warning

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nfter

cover,

product

sufficiently

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risk

further

To

service nnd

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follow

CHANGES

the

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isolnted

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the

for

manufacturer's

voltoges

when

(00548-90009)

MODEL

Certificntfon/Warranty

be

risk

%484

WARN

ING

connected

the

from

of

equipment

exceeding

o

to

supply

main

eleastric

under

service

30

power

and

to

shock,

test

snfety

VAMS

Page

Assistonce

source

prevent

refer

(when

50°

or

&

which

is

that

the

to

applicable)

precautions

are

VDC

is

on

HEWLETT

|

)

PACKARD

ai

Manual

Part

No.

00548-90009

Printed

in

U.S.A.