Eberline ESP-1 - TROUBLESHOOTING

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Troubleshooting

The

ESP-1

uses

the

latest

state-of-the-art

components

and

circuitry

available

at

the

time

of

its

design.

Eberline's

experience

using

similar

components

has

shown

them

to

be

very

reliable

and

trouble

free.

Realizing

that

failures

and

problems

will

occur,

this

section

is

intended

to

assist

the

technician

with

the

task

of

repair.

Eberline

provides

a

repair

and

calibration

service

at

two

locations

in

the

United

States

and

one

in

England

for

the

European

market.

Contact

Eberline

for

details

(see

front

of

manual).

To

hold

downtime

to

the

minimum

possible,

users

might

consider

changing

the

entire

printed-circuit-board

set.

By

maintaining

a

spare

board

set

and

exchanging

the

board

set

when

a

failure

occurs,

downtime

(including

recalibration)

can

probably

be

limited

to

less

than

one

hour.

The

inoperative

board(s)

can

then

be

repaired

in-house

or

by

Eberline

without

taking

the

ESP-1

out

of

service

for

lengthy

periods

of

time.

NOTE

Always

recalibrate

after

repair.

a.

General

Procedure

A

thorough

understanding

of

the

ESP-1

circuitry

and

program

operation

is

necessary

before

any

field

repairs

are

attempted.

For

component

problems,

review

section

IV,

"Theory

of

Operation"

and

the

schematic

and

logic

drawings,

section

V.

For

problems

related

to

operation,

review

section

III

"Detailed

Operation"

and

the

logic

flow

charts,

section

VII.

The

incorporation

of

a

microcomputer

in

the

ESP-1

does

not

change

the

general

approach

to

trouble-shooting

and

repair.

In

short,

the

problem

must

be

defined,

the

trouble

isolated,

and

the

defect

identified.

Only

then

can

effective

repair

be

accomplished.

The

circuitry

used

in

the

ESP-1

employs

CMOS

technology.

These

CMOS

devices

are

sensitive

to

electrostatic

discharge.

To

prevent

damage,

they

should

be

properly

grounded

before

and

during

handling.

Generally,

problems

can

be

defined

in

one

of

two

categories.

These

would

be

a

nonfunctioning

microcomputer

or

a

nonfunctioning

counter.

NOTE

"Counter"

refers

to

the

pulse

amplifier,

low-voltage

circuits,

and

high-voltage

circuits.

A

nonfunctioning

microcomputer

can

be

recognized

by:

M

No

information

on

the

display.

Ш

Erratic

display

information.

ГА

Ш

Unidentifiable/wrong

characters

on

the

display.

ESP1.MAN/February

1992

5-11

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